mirror of
https://github.com/mozilla/gecko-dev.git
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8474 lines
303 KiB
C++
8474 lines
303 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=78: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsLayoutUtils.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/gfx/PathHelpers.h"
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#include "mozilla/Likely.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/MemoryReporting.h"
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#include "nsCharTraits.h"
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#include "nsFontMetrics.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDOMHTMLElement.h"
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#include "nsFrameList.h"
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#include "nsGkAtoms.h"
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#include "nsHtml5Atoms.h"
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#include "nsIAtom.h"
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#include "nsCSSPseudoElements.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSColorUtils.h"
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#include "nsView.h"
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#include "nsViewManager.h"
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#include "nsPlaceholderFrame.h"
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#include "nsIScrollableFrame.h"
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#include "nsIDOMEvent.h"
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#include "nsDisplayList.h"
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#include "nsRegion.h"
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#include "nsFrameManager.h"
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#include "nsBlockFrame.h"
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#include "nsBidiPresUtils.h"
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#include "imgIContainer.h"
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#include "ImageOps.h"
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#include "ImageRegion.h"
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#include "gfxRect.h"
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#include "gfxContext.h"
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#include "nsRenderingContext.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsCSSRendering.h"
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#include "nsThemeConstants.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDocShell.h"
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#include "nsIWidget.h"
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#include "gfxMatrix.h"
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#include "gfxPrefs.h"
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#include "gfxTypes.h"
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#include "nsTArray.h"
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#include "mozilla/dom/HTMLCanvasElement.h"
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#include "nsICanvasRenderingContextInternal.h"
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#include "gfxPlatform.h"
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#include <algorithm>
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#include <limits>
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#include "mozilla/dom/HTMLVideoElement.h"
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#include "mozilla/dom/HTMLImageElement.h"
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#include "mozilla/dom/DOMRect.h"
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#include "mozilla/dom/KeyframeEffect.h"
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#include "imgIRequest.h"
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#include "nsIImageLoadingContent.h"
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#include "nsCOMPtr.h"
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#include "nsCSSProps.h"
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#include "nsListControlFrame.h"
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#include "mozilla/dom/Element.h"
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#include "nsCanvasFrame.h"
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#include "gfxDrawable.h"
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#include "gfxUtils.h"
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#include "nsDataHashtable.h"
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#include "nsTextFrame.h"
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#include "nsFontFaceList.h"
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#include "nsFontInflationData.h"
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#include "nsSVGUtils.h"
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#include "SVGImageContext.h"
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#include "SVGTextFrame.h"
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#include "nsStyleStructInlines.h"
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#include "nsStyleTransformMatrix.h"
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#include "nsIFrameInlines.h"
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#include "ImageContainer.h"
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#include "nsComputedDOMStyle.h"
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#include "ActiveLayerTracker.h"
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#include "mozilla/gfx/2D.h"
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#include "gfx2DGlue.h"
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#include "mozilla/LookAndFeel.h"
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#include "UnitTransforms.h"
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#include "TiledLayerBuffer.h" // For TILEDLAYERBUFFER_TILE_SIZE
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#include "ClientLayerManager.h"
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#include "nsRefreshDriver.h"
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#include "nsIContentViewer.h"
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#include "LayersLogging.h"
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#include "mozilla/Preferences.h"
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#include "nsFrameSelection.h"
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#include "FrameLayerBuilder.h"
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#include "mozilla/layers/APZCTreeManager.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventStateManager.h"
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#ifdef MOZ_XUL
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#include "nsXULPopupManager.h"
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#endif
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#include "GeckoProfiler.h"
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#include "nsAnimationManager.h"
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#include "nsTransitionManager.h"
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#include "RestyleManager.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::image;
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using namespace mozilla::layers;
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using namespace mozilla::layout;
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using namespace mozilla::gfx;
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#define GRID_ENABLED_PREF_NAME "layout.css.grid.enabled"
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#define RUBY_ENABLED_PREF_NAME "layout.css.ruby.enabled"
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#define STICKY_ENABLED_PREF_NAME "layout.css.sticky.enabled"
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#define DISPLAY_CONTENTS_ENABLED_PREF_NAME "layout.css.display-contents.enabled"
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#define TEXT_ALIGN_TRUE_ENABLED_PREF_NAME "layout.css.text-align-true-value.enabled"
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#ifdef DEBUG
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// TODO: remove, see bug 598468.
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bool nsLayoutUtils::gPreventAssertInCompareTreePosition = false;
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#endif // DEBUG
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typedef FrameMetrics::ViewID ViewID;
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typedef nsStyleTransformMatrix::TransformReferenceBox TransformReferenceBox;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationEmPerLine;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationMinTwips;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationLineThreshold;
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/* static */ int32_t nsLayoutUtils::sFontSizeInflationMappingIntercept;
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/* static */ uint32_t nsLayoutUtils::sFontSizeInflationMaxRatio;
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/* static */ bool nsLayoutUtils::sFontSizeInflationForceEnabled;
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/* static */ bool nsLayoutUtils::sFontSizeInflationDisabledInMasterProcess;
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/* static */ bool nsLayoutUtils::sInvalidationDebuggingIsEnabled;
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/* static */ bool nsLayoutUtils::sCSSVariablesEnabled;
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/* static */ bool nsLayoutUtils::sInterruptibleReflowEnabled;
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/* static */ bool nsLayoutUtils::sSVGTransformOriginEnabled;
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static ViewID sScrollIdCounter = FrameMetrics::START_SCROLL_ID;
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typedef nsDataHashtable<nsUint64HashKey, nsIContent*> ContentMap;
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static ContentMap* sContentMap = nullptr;
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static ContentMap& GetContentMap() {
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if (!sContentMap) {
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sContentMap = new ContentMap();
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}
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return *sContentMap;
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}
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// When the pref "layout.css.grid.enabled" changes, this function is invoked
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// to let us update kDisplayKTable, to selectively disable or restore the
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// entries for "grid" and "inline-grid" in that table.
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static void
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GridEnabledPrefChangeCallback(const char* aPrefName, void* aClosure)
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{
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MOZ_ASSERT(strncmp(aPrefName, GRID_ENABLED_PREF_NAME,
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ArrayLength(GRID_ENABLED_PREF_NAME)) == 0,
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"We only registered this callback for a single pref, so it "
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"should only be called for that pref");
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static int32_t sIndexOfGridInDisplayTable;
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static int32_t sIndexOfInlineGridInDisplayTable;
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static bool sAreGridKeywordIndicesInitialized; // initialized to false
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bool isGridEnabled =
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Preferences::GetBool(GRID_ENABLED_PREF_NAME, false);
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if (!sAreGridKeywordIndicesInitialized) {
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// First run: find the position of "grid" and "inline-grid" in
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// kDisplayKTable.
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sIndexOfGridInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_grid,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfGridInDisplayTable >= 0,
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"Couldn't find grid in kDisplayKTable");
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sIndexOfInlineGridInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_inline_grid,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfInlineGridInDisplayTable >= 0,
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"Couldn't find inline-grid in kDisplayKTable");
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sAreGridKeywordIndicesInitialized = true;
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}
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// OK -- now, stomp on or restore the "grid" entries in kDisplayKTable,
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// depending on whether the grid pref is enabled vs. disabled.
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if (sIndexOfGridInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfGridInDisplayTable] =
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isGridEnabled ? eCSSKeyword_grid : eCSSKeyword_UNKNOWN;
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}
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if (sIndexOfInlineGridInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfInlineGridInDisplayTable] =
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isGridEnabled ? eCSSKeyword_inline_grid : eCSSKeyword_UNKNOWN;
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}
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}
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static void
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RubyEnabledPrefChangeCallback(const char* aPrefName, void* aClosure)
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{
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MOZ_ASSERT(strncmp(aPrefName, RUBY_ENABLED_PREF_NAME,
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ArrayLength(RUBY_ENABLED_PREF_NAME)) == 0,
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"We only registered this callback for a single pref, so it "
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"should only be called for that pref");
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static int32_t sIndexOfRubyInDisplayTable;
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static int32_t sIndexOfRubyBaseInDisplayTable;
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static int32_t sIndexOfRubyBaseContainerInDisplayTable;
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static int32_t sIndexOfRubyTextInDisplayTable;
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static int32_t sIndexOfRubyTextContainerInDisplayTable;
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static bool sAreRubyKeywordIndicesInitialized; // initialized to false
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bool isRubyEnabled =
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Preferences::GetBool(RUBY_ENABLED_PREF_NAME, false);
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if (!sAreRubyKeywordIndicesInitialized) {
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// First run: find the position of the ruby display values in
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// kDisplayKTable.
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sIndexOfRubyInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_ruby,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfRubyInDisplayTable >= 0,
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"Couldn't find ruby in kDisplayKTable");
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sIndexOfRubyBaseInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_ruby_base,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfRubyBaseInDisplayTable >= 0,
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"Couldn't find ruby-base in kDisplayKTable");
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sIndexOfRubyBaseContainerInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_ruby_base_container,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfRubyBaseContainerInDisplayTable >= 0,
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"Couldn't find ruby-base-container in kDisplayKTable");
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sIndexOfRubyTextInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_ruby_text,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfRubyTextInDisplayTable >= 0,
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"Couldn't find ruby-text in kDisplayKTable");
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sIndexOfRubyTextContainerInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_ruby_text_container,
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nsCSSProps::kDisplayKTable);
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MOZ_ASSERT(sIndexOfRubyTextContainerInDisplayTable >= 0,
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"Couldn't find ruby-text-container in kDisplayKTable");
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sAreRubyKeywordIndicesInitialized = true;
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}
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// OK -- now, stomp on or restore the "ruby" entries in kDisplayKTable,
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// depending on whether the ruby pref is enabled vs. disabled.
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if (sIndexOfRubyInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfRubyInDisplayTable] =
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isRubyEnabled ? eCSSKeyword_ruby : eCSSKeyword_UNKNOWN;
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}
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if (sIndexOfRubyBaseInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfRubyBaseInDisplayTable] =
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isRubyEnabled ? eCSSKeyword_ruby_base : eCSSKeyword_UNKNOWN;
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}
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if (sIndexOfRubyBaseContainerInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfRubyBaseContainerInDisplayTable] =
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isRubyEnabled ? eCSSKeyword_ruby_base_container : eCSSKeyword_UNKNOWN;
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}
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if (sIndexOfRubyTextInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfRubyTextInDisplayTable] =
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isRubyEnabled ? eCSSKeyword_ruby_text : eCSSKeyword_UNKNOWN;
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}
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if (sIndexOfRubyTextContainerInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfRubyTextContainerInDisplayTable] =
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isRubyEnabled ? eCSSKeyword_ruby_text_container : eCSSKeyword_UNKNOWN;
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}
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}
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// When the pref "layout.css.sticky.enabled" changes, this function is invoked
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// to let us update kPositionKTable, to selectively disable or restore the
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// entry for "sticky" in that table.
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static void
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StickyEnabledPrefChangeCallback(const char* aPrefName, void* aClosure)
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{
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MOZ_ASSERT(strncmp(aPrefName, STICKY_ENABLED_PREF_NAME,
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ArrayLength(STICKY_ENABLED_PREF_NAME)) == 0,
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"We only registered this callback for a single pref, so it "
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"should only be called for that pref");
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static int32_t sIndexOfStickyInPositionTable;
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static bool sIsStickyKeywordIndexInitialized; // initialized to false
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bool isStickyEnabled =
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Preferences::GetBool(STICKY_ENABLED_PREF_NAME, false);
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if (!sIsStickyKeywordIndexInitialized) {
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// First run: find the position of "sticky" in kPositionKTable.
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sIndexOfStickyInPositionTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_sticky,
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nsCSSProps::kPositionKTable);
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MOZ_ASSERT(sIndexOfStickyInPositionTable >= 0,
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"Couldn't find sticky in kPositionKTable");
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sIsStickyKeywordIndexInitialized = true;
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}
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// OK -- now, stomp on or restore the "sticky" entry in kPositionKTable,
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// depending on whether the sticky pref is enabled vs. disabled.
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nsCSSProps::kPositionKTable[sIndexOfStickyInPositionTable] =
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isStickyEnabled ? eCSSKeyword_sticky : eCSSKeyword_UNKNOWN;
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}
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// When the pref "layout.css.display-contents.enabled" changes, this function is
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// invoked to let us update kDisplayKTable, to selectively disable or restore
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// the entries for "contents" in that table.
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static void
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DisplayContentsEnabledPrefChangeCallback(const char* aPrefName, void* aClosure)
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{
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NS_ASSERTION(strcmp(aPrefName, DISPLAY_CONTENTS_ENABLED_PREF_NAME) == 0,
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"Did you misspell " DISPLAY_CONTENTS_ENABLED_PREF_NAME " ?");
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static bool sIsDisplayContentsKeywordIndexInitialized;
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static int32_t sIndexOfContentsInDisplayTable;
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bool isDisplayContentsEnabled =
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Preferences::GetBool(DISPLAY_CONTENTS_ENABLED_PREF_NAME, false);
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if (!sIsDisplayContentsKeywordIndexInitialized) {
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// First run: find the position of "contents" in kDisplayKTable.
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sIndexOfContentsInDisplayTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_contents,
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nsCSSProps::kDisplayKTable);
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sIsDisplayContentsKeywordIndexInitialized = true;
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}
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// OK -- now, stomp on or restore the "contents" entry in kDisplayKTable,
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// depending on whether the pref is enabled vs. disabled.
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if (sIndexOfContentsInDisplayTable >= 0) {
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nsCSSProps::kDisplayKTable[sIndexOfContentsInDisplayTable] =
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isDisplayContentsEnabled ? eCSSKeyword_contents : eCSSKeyword_UNKNOWN;
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}
|
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}
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||
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// When the pref "layout.css.text-align-true-value.enabled" changes, this
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// function is called to let us update kTextAlignKTable & kTextAlignLastKTable,
|
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// to selectively disable or restore the entries for "true" in those tables.
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static void
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TextAlignTrueEnabledPrefChangeCallback(const char* aPrefName, void* aClosure)
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{
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NS_ASSERTION(strcmp(aPrefName, TEXT_ALIGN_TRUE_ENABLED_PREF_NAME) == 0,
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"Did you misspell " TEXT_ALIGN_TRUE_ENABLED_PREF_NAME " ?");
|
||
|
||
static bool sIsInitialized;
|
||
static int32_t sIndexOfTrueInTextAlignTable;
|
||
static int32_t sIndexOfTrueInTextAlignLastTable;
|
||
bool isTextAlignTrueEnabled =
|
||
Preferences::GetBool(TEXT_ALIGN_TRUE_ENABLED_PREF_NAME, false);
|
||
|
||
if (!sIsInitialized) {
|
||
// First run: find the position of "true" in kTextAlignKTable.
|
||
sIndexOfTrueInTextAlignTable =
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_true,
|
||
nsCSSProps::kTextAlignKTable);
|
||
// First run: find the position of "true" in kTextAlignLastKTable.
|
||
sIndexOfTrueInTextAlignLastTable =
|
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nsCSSProps::FindIndexOfKeyword(eCSSKeyword_true,
|
||
nsCSSProps::kTextAlignLastKTable);
|
||
sIsInitialized = true;
|
||
}
|
||
|
||
// OK -- now, stomp on or restore the "true" entry in the keyword tables,
|
||
// depending on whether the pref is enabled vs. disabled.
|
||
MOZ_ASSERT(sIndexOfTrueInTextAlignTable >= 0);
|
||
nsCSSProps::kTextAlignKTable[sIndexOfTrueInTextAlignTable] =
|
||
isTextAlignTrueEnabled ? eCSSKeyword_true : eCSSKeyword_UNKNOWN;
|
||
MOZ_ASSERT(sIndexOfTrueInTextAlignLastTable >= 0);
|
||
nsCSSProps::kTextAlignLastKTable[sIndexOfTrueInTextAlignLastTable] =
|
||
isTextAlignTrueEnabled ? eCSSKeyword_true : eCSSKeyword_UNKNOWN;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::HasAnimationsForCompositor(nsIContent* aContent,
|
||
nsCSSProperty aProperty)
|
||
{
|
||
return nsAnimationManager::GetAnimationsForCompositor(aContent, aProperty) ||
|
||
nsTransitionManager::GetAnimationsForCompositor(aContent, aProperty);
|
||
}
|
||
|
||
static AnimationCollection*
|
||
GetAnimationsOrTransitions(nsIContent* aContent,
|
||
nsIAtom* aAnimationProperty,
|
||
nsCSSProperty aProperty)
|
||
{
|
||
AnimationCollection* collection =
|
||
static_cast<AnimationCollection*>(aContent->GetProperty(
|
||
aAnimationProperty));
|
||
if (collection) {
|
||
bool propertyMatches = collection->HasAnimationOfProperty(aProperty);
|
||
if (propertyMatches) {
|
||
return collection;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::HasAnimations(nsIContent* aContent,
|
||
nsCSSProperty aProperty)
|
||
{
|
||
if (!aContent->MayHaveAnimations())
|
||
return false;
|
||
return GetAnimationsOrTransitions(aContent, nsGkAtoms::animationsProperty,
|
||
aProperty) ||
|
||
GetAnimationsOrTransitions(aContent, nsGkAtoms::transitionsProperty,
|
||
aProperty);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::HasCurrentAnimations(nsIContent* aContent,
|
||
nsIAtom* aAnimationProperty)
|
||
{
|
||
if (!aContent->MayHaveAnimations())
|
||
return false;
|
||
|
||
AnimationCollection* collection =
|
||
static_cast<AnimationCollection*>(
|
||
aContent->GetProperty(aAnimationProperty));
|
||
return (collection && collection->HasCurrentAnimations());
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::HasCurrentAnimationsForProperties(nsIContent* aContent,
|
||
const nsCSSProperty* aProperties,
|
||
size_t aPropertyCount)
|
||
{
|
||
if (!aContent->MayHaveAnimations())
|
||
return false;
|
||
|
||
static nsIAtom* const sAnimProps[] = { nsGkAtoms::transitionsProperty,
|
||
nsGkAtoms::animationsProperty,
|
||
nullptr };
|
||
for (nsIAtom* const* animProp = sAnimProps; *animProp; animProp++) {
|
||
AnimationCollection* collection =
|
||
static_cast<AnimationCollection*>(aContent->GetProperty(*animProp));
|
||
if (collection &&
|
||
collection->HasCurrentAnimationsForProperties(aProperties,
|
||
aPropertyCount)) {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
static gfxSize
|
||
GetScaleForValue(const StyleAnimationValue& aValue, nsIFrame* aFrame)
|
||
{
|
||
if (!aFrame) {
|
||
NS_WARNING("No frame.");
|
||
return gfxSize();
|
||
}
|
||
if (aValue.GetUnit() != StyleAnimationValue::eUnit_Transform) {
|
||
NS_WARNING("Expected a transform.");
|
||
return gfxSize();
|
||
}
|
||
|
||
nsCSSValueSharedList* list = aValue.GetCSSValueSharedListValue();
|
||
MOZ_ASSERT(list->mHead);
|
||
|
||
if (list->mHead->mValue.GetUnit() == eCSSUnit_None) {
|
||
// There is an animation, but no actual transform yet.
|
||
return gfxSize();
|
||
}
|
||
|
||
bool dontCare;
|
||
TransformReferenceBox refBox(aFrame);
|
||
gfx3DMatrix transform = nsStyleTransformMatrix::ReadTransforms(
|
||
list->mHead,
|
||
aFrame->StyleContext(),
|
||
aFrame->PresContext(), dontCare, refBox,
|
||
aFrame->PresContext()->AppUnitsPerDevPixel());
|
||
|
||
gfxMatrix transform2d;
|
||
bool canDraw2D = transform.CanDraw2D(&transform2d);
|
||
if (!canDraw2D) {
|
||
return gfxSize();
|
||
}
|
||
|
||
return transform2d.ScaleFactors(true);
|
||
}
|
||
|
||
static float
|
||
GetSuitableScale(float aMaxScale, float aMinScale,
|
||
nscoord aVisibleDimension, nscoord aDisplayDimension)
|
||
{
|
||
float displayVisibleRatio = float(aDisplayDimension) /
|
||
float(aVisibleDimension);
|
||
// We want to rasterize based on the largest scale used during the
|
||
// transform animation, unless that would make us rasterize something
|
||
// larger than the screen. But we never want to go smaller than the
|
||
// minimum scale over the animation.
|
||
return std::max(std::min(aMaxScale, displayVisibleRatio), aMinScale);
|
||
}
|
||
|
||
static void
|
||
GetMinAndMaxScaleForAnimationProperty(nsIContent* aContent,
|
||
AnimationCollection* aAnimations,
|
||
gfxSize& aMaxScale,
|
||
gfxSize& aMinScale)
|
||
{
|
||
for (size_t animIdx = aAnimations->mAnimations.Length(); animIdx-- != 0; ) {
|
||
dom::Animation* anim = aAnimations->mAnimations[animIdx];
|
||
if (!anim->GetEffect() || anim->GetEffect()->IsFinishedTransition()) {
|
||
continue;
|
||
}
|
||
dom::KeyframeEffectReadOnly* effect = anim->GetEffect();
|
||
for (size_t propIdx = effect->Properties().Length(); propIdx-- != 0; ) {
|
||
AnimationProperty& prop = effect->Properties()[propIdx];
|
||
if (prop.mProperty == eCSSProperty_transform) {
|
||
for (uint32_t segIdx = prop.mSegments.Length(); segIdx-- != 0; ) {
|
||
AnimationPropertySegment& segment = prop.mSegments[segIdx];
|
||
gfxSize from = GetScaleForValue(segment.mFromValue,
|
||
aContent->GetPrimaryFrame());
|
||
aMaxScale.width = std::max<float>(aMaxScale.width, from.width);
|
||
aMaxScale.height = std::max<float>(aMaxScale.height, from.height);
|
||
aMinScale.width = std::min<float>(aMinScale.width, from.width);
|
||
aMinScale.height = std::min<float>(aMinScale.height, from.height);
|
||
gfxSize to = GetScaleForValue(segment.mToValue,
|
||
aContent->GetPrimaryFrame());
|
||
aMaxScale.width = std::max<float>(aMaxScale.width, to.width);
|
||
aMaxScale.height = std::max<float>(aMaxScale.height, to.height);
|
||
aMinScale.width = std::min<float>(aMinScale.width, to.width);
|
||
aMinScale.height = std::min<float>(aMinScale.height, to.height);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
gfxSize
|
||
nsLayoutUtils::ComputeSuitableScaleForAnimation(nsIContent* aContent,
|
||
const nsSize& aVisibleSize,
|
||
const nsSize& aDisplaySize)
|
||
{
|
||
gfxSize maxScale(std::numeric_limits<gfxFloat>::min(),
|
||
std::numeric_limits<gfxFloat>::min());
|
||
gfxSize minScale(std::numeric_limits<gfxFloat>::max(),
|
||
std::numeric_limits<gfxFloat>::max());
|
||
|
||
AnimationCollection* animations =
|
||
nsAnimationManager::GetAnimationsForCompositor(aContent,
|
||
eCSSProperty_transform);
|
||
if (animations) {
|
||
GetMinAndMaxScaleForAnimationProperty(aContent, animations,
|
||
maxScale, minScale);
|
||
}
|
||
|
||
animations =
|
||
nsTransitionManager::GetAnimationsForCompositor(aContent,
|
||
eCSSProperty_transform);
|
||
if (animations) {
|
||
GetMinAndMaxScaleForAnimationProperty(aContent, animations,
|
||
maxScale, minScale);
|
||
}
|
||
|
||
if (maxScale.width == std::numeric_limits<gfxFloat>::min()) {
|
||
// We didn't encounter a transform
|
||
return gfxSize(1.0, 1.0);
|
||
}
|
||
|
||
return gfxSize(GetSuitableScale(maxScale.width, minScale.width,
|
||
aVisibleSize.width, aDisplaySize.width),
|
||
GetSuitableScale(maxScale.height, minScale.height,
|
||
aVisibleSize.height, aDisplaySize.height));
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::AreAsyncAnimationsEnabled()
|
||
{
|
||
static bool sAreAsyncAnimationsEnabled;
|
||
static bool sAsyncPrefCached = false;
|
||
|
||
if (!sAsyncPrefCached) {
|
||
sAsyncPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sAreAsyncAnimationsEnabled,
|
||
"layers.offmainthreadcomposition.async-animations");
|
||
}
|
||
|
||
return sAreAsyncAnimationsEnabled &&
|
||
gfxPlatform::OffMainThreadCompositingEnabled();
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsAnimationLoggingEnabled()
|
||
{
|
||
static bool sShouldLog;
|
||
static bool sShouldLogPrefCached;
|
||
|
||
if (!sShouldLogPrefCached) {
|
||
sShouldLogPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sShouldLog,
|
||
"layers.offmainthreadcomposition.log-animations");
|
||
}
|
||
|
||
return sShouldLog;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::UseBackgroundNearestFiltering()
|
||
{
|
||
static bool sUseBackgroundNearestFilteringEnabled;
|
||
static bool sUseBackgroundNearestFilteringPrefInitialised = false;
|
||
|
||
if (!sUseBackgroundNearestFilteringPrefInitialised) {
|
||
sUseBackgroundNearestFilteringPrefInitialised = true;
|
||
sUseBackgroundNearestFilteringEnabled =
|
||
Preferences::GetBool("gfx.filter.nearest.force-enabled", false);
|
||
}
|
||
|
||
return sUseBackgroundNearestFilteringEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::GPUImageScalingEnabled()
|
||
{
|
||
static bool sGPUImageScalingEnabled;
|
||
static bool sGPUImageScalingPrefInitialised = false;
|
||
|
||
if (!sGPUImageScalingPrefInitialised) {
|
||
sGPUImageScalingPrefInitialised = true;
|
||
sGPUImageScalingEnabled =
|
||
Preferences::GetBool("layout.gpu-image-scaling.enabled", false);
|
||
}
|
||
|
||
return sGPUImageScalingEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::AnimatedImageLayersEnabled()
|
||
{
|
||
static bool sAnimatedImageLayersEnabled;
|
||
static bool sAnimatedImageLayersPrefCached = false;
|
||
|
||
if (!sAnimatedImageLayersPrefCached) {
|
||
sAnimatedImageLayersPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sAnimatedImageLayersEnabled,
|
||
"layout.animated-image-layers.enabled",
|
||
false);
|
||
}
|
||
|
||
return sAnimatedImageLayersEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::CSSFiltersEnabled()
|
||
{
|
||
static bool sCSSFiltersEnabled;
|
||
static bool sCSSFiltersPrefCached = false;
|
||
|
||
if (!sCSSFiltersPrefCached) {
|
||
sCSSFiltersPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sCSSFiltersEnabled,
|
||
"layout.css.filters.enabled",
|
||
false);
|
||
}
|
||
|
||
return sCSSFiltersEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::CSSClipPathShapesEnabled()
|
||
{
|
||
static bool sCSSClipPathShapesEnabled;
|
||
static bool sCSSClipPathShapesPrefCached = false;
|
||
|
||
if (!sCSSClipPathShapesPrefCached) {
|
||
sCSSClipPathShapesPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sCSSClipPathShapesEnabled,
|
||
"layout.css.clip-path-shapes.enabled",
|
||
false);
|
||
}
|
||
|
||
return sCSSClipPathShapesEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::UnsetValueEnabled()
|
||
{
|
||
static bool sUnsetValueEnabled;
|
||
static bool sUnsetValuePrefCached = false;
|
||
|
||
if (!sUnsetValuePrefCached) {
|
||
sUnsetValuePrefCached = true;
|
||
Preferences::AddBoolVarCache(&sUnsetValueEnabled,
|
||
"layout.css.unset-value.enabled",
|
||
false);
|
||
}
|
||
|
||
return sUnsetValueEnabled;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsTextAlignTrueValueEnabled()
|
||
{
|
||
static bool sTextAlignTrueValueEnabled;
|
||
static bool sTextAlignTrueValueEnabledPrefCached = false;
|
||
|
||
if (!sTextAlignTrueValueEnabledPrefCached) {
|
||
sTextAlignTrueValueEnabledPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sTextAlignTrueValueEnabled,
|
||
TEXT_ALIGN_TRUE_ENABLED_PREF_NAME,
|
||
false);
|
||
}
|
||
|
||
return sTextAlignTrueValueEnabled;
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::UnionChildOverflow(nsIFrame* aFrame,
|
||
nsOverflowAreas& aOverflowAreas,
|
||
FrameChildListIDs aSkipChildLists)
|
||
{
|
||
// Iterate over all children except pop-ups.
|
||
FrameChildListIDs skip = aSkipChildLists |
|
||
nsIFrame::kSelectPopupList | nsIFrame::kPopupList;
|
||
for (nsIFrame::ChildListIterator childLists(aFrame);
|
||
!childLists.IsDone(); childLists.Next()) {
|
||
if (skip.Contains(childLists.CurrentID())) {
|
||
continue;
|
||
}
|
||
|
||
nsFrameList children = childLists.CurrentList();
|
||
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
|
||
nsIFrame* child = e.get();
|
||
nsOverflowAreas childOverflow =
|
||
child->GetOverflowAreas() + child->GetPosition();
|
||
aOverflowAreas.UnionWith(childOverflow);
|
||
}
|
||
}
|
||
}
|
||
|
||
static void DestroyViewID(void* aObject, nsIAtom* aPropertyName,
|
||
void* aPropertyValue, void* aData)
|
||
{
|
||
ViewID* id = static_cast<ViewID*>(aPropertyValue);
|
||
GetContentMap().Remove(*id);
|
||
delete id;
|
||
}
|
||
|
||
/**
|
||
* A namespace class for static layout utilities.
|
||
*/
|
||
|
||
bool
|
||
nsLayoutUtils::FindIDFor(const nsIContent* aContent, ViewID* aOutViewId)
|
||
{
|
||
void* scrollIdProperty = aContent->GetProperty(nsGkAtoms::RemoteId);
|
||
if (scrollIdProperty) {
|
||
*aOutViewId = *static_cast<ViewID*>(scrollIdProperty);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
ViewID
|
||
nsLayoutUtils::FindOrCreateIDFor(nsIContent* aContent)
|
||
{
|
||
ViewID scrollId;
|
||
|
||
if (!FindIDFor(aContent, &scrollId)) {
|
||
scrollId = sScrollIdCounter++;
|
||
aContent->SetProperty(nsGkAtoms::RemoteId, new ViewID(scrollId),
|
||
DestroyViewID);
|
||
GetContentMap().Put(scrollId, aContent);
|
||
}
|
||
|
||
return scrollId;
|
||
}
|
||
|
||
nsIContent*
|
||
nsLayoutUtils::FindContentFor(ViewID aId)
|
||
{
|
||
MOZ_ASSERT(aId != FrameMetrics::NULL_SCROLL_ID,
|
||
"Cannot find a content element in map for null IDs.");
|
||
nsIContent* content;
|
||
bool exists = GetContentMap().Get(aId, &content);
|
||
|
||
if (exists) {
|
||
return content;
|
||
} else {
|
||
return nullptr;
|
||
}
|
||
}
|
||
|
||
nsIScrollableFrame*
|
||
nsLayoutUtils::FindScrollableFrameFor(ViewID aId)
|
||
{
|
||
nsIContent* content = FindContentFor(aId);
|
||
if (!content) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsIFrame* scrolledFrame = content->GetPrimaryFrame();
|
||
if (scrolledFrame && content->OwnerDoc()->GetRootElement() == content) {
|
||
// The content is the root element of a subdocument, so return the root scrollable
|
||
// for the subdocument.
|
||
scrolledFrame = scrolledFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
||
}
|
||
return scrolledFrame ? scrolledFrame->GetScrollTargetFrame() : nullptr;
|
||
}
|
||
|
||
static nsRect
|
||
ApplyRectMultiplier(nsRect aRect, float aMultiplier)
|
||
{
|
||
if (aMultiplier == 1.0f) {
|
||
return aRect;
|
||
}
|
||
float newWidth = aRect.width * aMultiplier;
|
||
float newHeight = aRect.height * aMultiplier;
|
||
float newX = aRect.x - ((newWidth - aRect.width) / 2.0f);
|
||
float newY = aRect.y - ((newHeight - aRect.height) / 2.0f);
|
||
// Rounding doesn't matter too much here, do a round-in
|
||
return nsRect(ceil(newX), ceil(newY), floor(newWidth), floor(newHeight));
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::UsesAsyncScrolling(nsIFrame* aFrame)
|
||
{
|
||
#ifdef MOZ_WIDGET_ANDROID
|
||
// We always have async scrolling for android
|
||
return true;
|
||
#endif
|
||
|
||
return AsyncPanZoomEnabled(aFrame);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::AsyncPanZoomEnabled(nsIFrame* aFrame)
|
||
{
|
||
// We use this as a shortcut, since if the compositor will never use APZ,
|
||
// no widget will either.
|
||
if (!gfxPrefs::AsyncPanZoomEnabledDoNotUseDirectly()) {
|
||
return false;
|
||
}
|
||
|
||
nsIFrame *frame = nsLayoutUtils::GetDisplayRootFrame(aFrame);
|
||
nsIWidget* widget = frame->GetNearestWidget();
|
||
if (!widget) {
|
||
return false;
|
||
}
|
||
return widget->AsyncPanZoomEnabled();
|
||
}
|
||
|
||
// Return the maximum displayport size, based on the LayerManager's maximum
|
||
// supported texture size. The result is in app units.
|
||
static nscoord
|
||
GetMaxDisplayPortSize(nsIContent* aContent)
|
||
{
|
||
MOZ_ASSERT(!gfxPrefs::LayersTilesEnabled(), "Do not clamp displayports if tiling is enabled");
|
||
|
||
nsIFrame* frame = aContent->GetPrimaryFrame();
|
||
if (!frame) {
|
||
return nscoord_MAX;
|
||
}
|
||
frame = nsLayoutUtils::GetDisplayRootFrame(frame);
|
||
|
||
nsIWidget* widget = frame->GetNearestWidget();
|
||
if (!widget) {
|
||
return nscoord_MAX;
|
||
}
|
||
LayerManager* lm = widget->GetLayerManager();
|
||
if (!lm) {
|
||
return nscoord_MAX;
|
||
}
|
||
nsPresContext* presContext = frame->PresContext();
|
||
|
||
int32_t maxSizeInDevPixels = lm->GetMaxTextureSize();
|
||
if (maxSizeInDevPixels < 0 || maxSizeInDevPixels == INT_MAX) {
|
||
return nscoord_MAX;
|
||
}
|
||
return presContext->DevPixelsToAppUnits(maxSizeInDevPixels);
|
||
}
|
||
|
||
static nsRect
|
||
GetDisplayPortFromRectData(nsIContent* aContent,
|
||
DisplayPortPropertyData* aRectData,
|
||
float aMultiplier)
|
||
{
|
||
// In the case where the displayport is set as a rect, we assume it is
|
||
// already aligned and clamped as necessary. The burden to do that is
|
||
// on the setter of the displayport. In practice very few places set the
|
||
// displayport directly as a rect (mostly tests). We still do need to
|
||
// expand it by the multiplier though.
|
||
return ApplyRectMultiplier(aRectData->mRect, aMultiplier);
|
||
}
|
||
|
||
static nsRect
|
||
GetDisplayPortFromMarginsData(nsIContent* aContent,
|
||
DisplayPortMarginsPropertyData* aMarginsData,
|
||
float aMultiplier)
|
||
{
|
||
// In the case where the displayport is set via margins, we apply the margins
|
||
// to a base rect. Then we align the expanded rect based on the alignment
|
||
// requested, further expand the rect by the multiplier, and finally, clamp it
|
||
// to the size of the scrollable rect.
|
||
|
||
nsRect base;
|
||
if (nsRect* baseData = static_cast<nsRect*>(aContent->GetProperty(nsGkAtoms::DisplayPortBase))) {
|
||
base = *baseData;
|
||
} else {
|
||
NS_WARNING("Attempting to get a margins-based displayport with no base data!");
|
||
}
|
||
|
||
nsIFrame* frame = aContent->GetPrimaryFrame();
|
||
if (!frame) {
|
||
// Turns out we can't really compute it. Oops. We still should return
|
||
// something sane. Note that although we can apply the multiplier on the
|
||
// base rect here, we can't tile-align or clamp the rect without a frame.
|
||
NS_WARNING("Attempting to get a displayport from a content with no primary frame!");
|
||
return ApplyRectMultiplier(base, aMultiplier);
|
||
}
|
||
|
||
bool isRoot = false;
|
||
if (aContent->OwnerDoc()->GetRootElement() == aContent) {
|
||
// We want the scroll frame, the root scroll frame differs from all
|
||
// others in that the primary frame is not the scroll frame.
|
||
frame = frame->PresContext()->PresShell()->GetRootScrollFrame();
|
||
if (!frame) {
|
||
// If there is no root scrollframe, just exit.
|
||
return ApplyRectMultiplier(base, aMultiplier);
|
||
}
|
||
|
||
isRoot = true;
|
||
}
|
||
|
||
nsPoint scrollPos;
|
||
if (nsIScrollableFrame* scrollableFrame = frame->GetScrollTargetFrame()) {
|
||
scrollPos = scrollableFrame->GetScrollPosition();
|
||
}
|
||
|
||
nsPresContext* presContext = frame->PresContext();
|
||
int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel();
|
||
|
||
LayoutDeviceToScreenScale2D res(presContext->PresShell()->GetCumulativeResolution()
|
||
* nsLayoutUtils::GetTransformToAncestorScale(frame));
|
||
|
||
// First convert the base rect to screen pixels
|
||
LayoutDeviceToScreenScale2D parentRes = res;
|
||
if (isRoot) {
|
||
// the base rect for root scroll frames is specified in the parent document
|
||
// coordinate space, so it doesn't include the local resolution.
|
||
float localRes = presContext->PresShell()->GetResolution();
|
||
parentRes.xScale /= localRes;
|
||
parentRes.yScale /= localRes;
|
||
}
|
||
ScreenRect screenRect = LayoutDeviceRect::FromAppUnits(base, auPerDevPixel)
|
||
* parentRes;
|
||
|
||
if (gfxPrefs::LayersTilesEnabled()) {
|
||
// Note on the correctness of applying the alignment in Screen space:
|
||
// The correct space to apply the alignment in would be Layer space, but
|
||
// we don't necessarily know the scale to convert to Layer space at this
|
||
// point because Layout may not yet have chosen the resolution at which to
|
||
// render (it chooses that in FrameLayerBuilder, but this can be called
|
||
// during display list building). Therefore, we perform the alignment in
|
||
// Screen space, which basically assumes that Layout chose to render at
|
||
// screen resolution; since this is what Layout does most of the time,
|
||
// this is a good approximation. A proper solution would involve moving
|
||
// the choosing of the resolution to display-list building time.
|
||
int alignmentX = gfxPlatform::GetPlatform()->GetTileWidth();
|
||
int alignmentY = gfxPlatform::GetPlatform()->GetTileHeight();
|
||
|
||
// Expand the rect by the margins
|
||
screenRect.Inflate(aMarginsData->mMargins);
|
||
|
||
// Inflate the rectangle by 1 so that we always push to the next tile
|
||
// boundary. This is desirable to stop from having a rectangle with a
|
||
// moving origin occasionally being smaller when it coincidentally lines
|
||
// up to tile boundaries.
|
||
screenRect.Inflate(1);
|
||
|
||
// Avoid division by zero.
|
||
if (alignmentX == 0) {
|
||
alignmentX = 1;
|
||
}
|
||
if (alignmentY == 0) {
|
||
alignmentY = 1;
|
||
}
|
||
|
||
ScreenPoint scrollPosScreen = LayoutDevicePoint::FromAppUnits(scrollPos, auPerDevPixel)
|
||
* res;
|
||
|
||
screenRect += scrollPosScreen;
|
||
float x = alignmentX * floor(screenRect.x / alignmentX);
|
||
float y = alignmentY * floor(screenRect.y / alignmentY);
|
||
float w = alignmentX * ceil(screenRect.XMost() / alignmentX) - x;
|
||
float h = alignmentY * ceil(screenRect.YMost() / alignmentY) - y;
|
||
screenRect = ScreenRect(x, y, w, h);
|
||
screenRect -= scrollPosScreen;
|
||
} else {
|
||
nscoord maxSizeInAppUnits = GetMaxDisplayPortSize(aContent);
|
||
if (maxSizeInAppUnits == nscoord_MAX) {
|
||
// Pick a safe maximum displayport size for sanity purposes. This is the
|
||
// lowest maximum texture size on tileless-platforms (Windows, D3D10).
|
||
maxSizeInAppUnits = presContext->DevPixelsToAppUnits(8192);
|
||
}
|
||
|
||
// Find the maximum size in screen pixels.
|
||
int32_t maxSizeInDevPixels = presContext->AppUnitsToDevPixels(maxSizeInAppUnits);
|
||
int32_t maxWidthInScreenPixels = floor(double(maxSizeInDevPixels) * res.xScale);
|
||
int32_t maxHeightInScreenPixels = floor(double(maxSizeInDevPixels) * res.yScale);
|
||
|
||
// For each axis, inflate the margins up to the maximum size.
|
||
const ScreenMargin& margins = aMarginsData->mMargins;
|
||
if (screenRect.height < maxHeightInScreenPixels) {
|
||
int32_t budget = maxHeightInScreenPixels - screenRect.height;
|
||
|
||
int32_t top = std::min(int32_t(margins.top), budget);
|
||
screenRect.y -= top;
|
||
screenRect.height += top + std::min(int32_t(margins.bottom), budget - top);
|
||
}
|
||
if (screenRect.width < maxWidthInScreenPixels) {
|
||
int32_t budget = maxWidthInScreenPixels - screenRect.width;
|
||
|
||
int32_t left = std::min(int32_t(margins.left), budget);
|
||
screenRect.x -= left;
|
||
screenRect.width += left + std::min(int32_t(margins.right), budget - left);
|
||
}
|
||
}
|
||
|
||
// Convert the aligned rect back into app units.
|
||
nsRect result = LayoutDeviceRect::ToAppUnits(screenRect / res, auPerDevPixel);
|
||
|
||
// Expand it for the low-res buffer if needed
|
||
result = ApplyRectMultiplier(result, aMultiplier);
|
||
|
||
// Finally, clamp it to the expanded scrollable rect.
|
||
nsRect expandedScrollableRect = nsLayoutUtils::CalculateExpandedScrollableRect(frame);
|
||
result = expandedScrollableRect.Intersect(result + scrollPos) - scrollPos;
|
||
|
||
return result;
|
||
}
|
||
|
||
static bool
|
||
GetDisplayPortImpl(nsIContent* aContent, nsRect *aResult, float aMultiplier)
|
||
{
|
||
DisplayPortPropertyData* rectData =
|
||
static_cast<DisplayPortPropertyData*>(aContent->GetProperty(nsGkAtoms::DisplayPort));
|
||
DisplayPortMarginsPropertyData* marginsData =
|
||
static_cast<DisplayPortMarginsPropertyData*>(aContent->GetProperty(nsGkAtoms::DisplayPortMargins));
|
||
|
||
if (!rectData && !marginsData) {
|
||
// This content element has no displayport data at all
|
||
return false;
|
||
}
|
||
|
||
if (!aResult) {
|
||
// We have displayport data, but the caller doesn't want the actual
|
||
// rect, so we don't need to actually compute it.
|
||
return true;
|
||
}
|
||
|
||
if (rectData && marginsData) {
|
||
// choose margins if equal priority
|
||
if (rectData->mPriority > marginsData->mPriority) {
|
||
marginsData = nullptr;
|
||
} else {
|
||
rectData = nullptr;
|
||
}
|
||
}
|
||
|
||
NS_ASSERTION((rectData == nullptr) != (marginsData == nullptr),
|
||
"Only one of rectData or marginsData should be set!");
|
||
|
||
nsRect result;
|
||
if (rectData) {
|
||
result = GetDisplayPortFromRectData(aContent, rectData, aMultiplier);
|
||
} else {
|
||
result = GetDisplayPortFromMarginsData(aContent, marginsData, aMultiplier);
|
||
}
|
||
|
||
if (!gfxPrefs::LayersTilesEnabled()) {
|
||
// Either we should have gotten a valid rect directly from the displayport
|
||
// base, or we should have computed a valid rect from the margins.
|
||
NS_ASSERTION(result.width <= GetMaxDisplayPortSize(aContent),
|
||
"Displayport must be a valid texture size");
|
||
NS_ASSERTION(result.height <= GetMaxDisplayPortSize(aContent),
|
||
"Displayport must be a valid texture size");
|
||
}
|
||
|
||
*aResult = result;
|
||
return true;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::GetDisplayPort(nsIContent* aContent, nsRect *aResult)
|
||
{
|
||
if (gfxPrefs::UseLowPrecisionBuffer()) {
|
||
return GetDisplayPortImpl(aContent, aResult, 1.0f / gfxPrefs::LowPrecisionResolution());
|
||
}
|
||
return GetDisplayPortImpl(aContent, aResult, 1.0f);
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::GetDisplayPortForVisibilityTesting(nsIContent* aContent,
|
||
nsRect* aResult)
|
||
{
|
||
return GetDisplayPortImpl(aContent, aResult, 1.0f);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::SetDisplayPortMargins(nsIContent* aContent,
|
||
nsIPresShell* aPresShell,
|
||
const ScreenMargin& aMargins,
|
||
uint32_t aPriority,
|
||
RepaintMode aRepaintMode)
|
||
{
|
||
MOZ_ASSERT(aContent);
|
||
MOZ_ASSERT(aContent->GetComposedDoc() == aPresShell->GetDocument());
|
||
|
||
DisplayPortMarginsPropertyData* currentData =
|
||
static_cast<DisplayPortMarginsPropertyData*>(aContent->GetProperty(nsGkAtoms::DisplayPortMargins));
|
||
if (currentData && currentData->mPriority > aPriority) {
|
||
return false;
|
||
}
|
||
|
||
aContent->SetProperty(nsGkAtoms::DisplayPortMargins,
|
||
new DisplayPortMarginsPropertyData(
|
||
aMargins, aPriority),
|
||
nsINode::DeleteProperty<DisplayPortMarginsPropertyData>);
|
||
|
||
if (gfxPrefs::LayoutUseContainersForRootFrames()) {
|
||
nsIFrame* rootScrollFrame = aPresShell->GetRootScrollFrame();
|
||
if (rootScrollFrame &&
|
||
aContent == rootScrollFrame->GetContent() &&
|
||
nsLayoutUtils::UsesAsyncScrolling(rootScrollFrame))
|
||
{
|
||
// We are setting a root displayport for a document.
|
||
// If we have APZ, then set a special flag on the pres shell so
|
||
// that we don't get scrollbars drawn.
|
||
aPresShell->SetIgnoreViewportScrolling(true);
|
||
}
|
||
}
|
||
|
||
if (aRepaintMode == RepaintMode::Repaint) {
|
||
nsIFrame* rootFrame = aPresShell->FrameManager()->GetRootFrame();
|
||
if (rootFrame) {
|
||
rootFrame->SchedulePaint();
|
||
}
|
||
}
|
||
|
||
// Display port margins changing means that the set of visible images may
|
||
// have drastically changed. Schedule an update.
|
||
aPresShell->ScheduleImageVisibilityUpdate();
|
||
|
||
return true;
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::SetDisplayPortBase(nsIContent* aContent, const nsRect& aBase)
|
||
{
|
||
aContent->SetProperty(nsGkAtoms::DisplayPortBase, new nsRect(aBase),
|
||
nsINode::DeleteProperty<nsRect>);
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::SetDisplayPortBaseIfNotSet(nsIContent* aContent, const nsRect& aBase)
|
||
{
|
||
if (!aContent->GetProperty(nsGkAtoms::DisplayPortBase)) {
|
||
SetDisplayPortBase(aContent, aBase);
|
||
}
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::GetCriticalDisplayPort(nsIContent* aContent, nsRect* aResult)
|
||
{
|
||
if (gfxPrefs::UseLowPrecisionBuffer()) {
|
||
return GetDisplayPortImpl(aContent, aResult, 1.0f);
|
||
}
|
||
return false;
|
||
}
|
||
|
||
nsContainerFrame*
|
||
nsLayoutUtils::LastContinuationWithChild(nsContainerFrame* aFrame)
|
||
{
|
||
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
||
nsIFrame* f = aFrame->LastContinuation();
|
||
while (!f->GetFirstPrincipalChild() && f->GetPrevContinuation()) {
|
||
f = f->GetPrevContinuation();
|
||
}
|
||
return static_cast<nsContainerFrame*>(f);
|
||
}
|
||
|
||
//static
|
||
FrameChildListID
|
||
nsLayoutUtils::GetChildListNameFor(nsIFrame* aChildFrame)
|
||
{
|
||
nsIFrame::ChildListID id = nsIFrame::kPrincipalList;
|
||
|
||
if (aChildFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
|
||
nsIFrame* pif = aChildFrame->GetPrevInFlow();
|
||
if (pif->GetParent() == aChildFrame->GetParent()) {
|
||
id = nsIFrame::kExcessOverflowContainersList;
|
||
}
|
||
else {
|
||
id = nsIFrame::kOverflowContainersList;
|
||
}
|
||
}
|
||
// See if the frame is moved out of the flow
|
||
else if (aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
|
||
// Look at the style information to tell
|
||
const nsStyleDisplay* disp = aChildFrame->StyleDisplay();
|
||
|
||
if (NS_STYLE_POSITION_ABSOLUTE == disp->mPosition) {
|
||
id = nsIFrame::kAbsoluteList;
|
||
} else if (NS_STYLE_POSITION_FIXED == disp->mPosition) {
|
||
if (nsLayoutUtils::IsReallyFixedPos(aChildFrame)) {
|
||
id = nsIFrame::kFixedList;
|
||
} else {
|
||
id = nsIFrame::kAbsoluteList;
|
||
}
|
||
#ifdef MOZ_XUL
|
||
} else if (NS_STYLE_DISPLAY_POPUP == disp->mDisplay) {
|
||
// Out-of-flows that are DISPLAY_POPUP must be kids of the root popup set
|
||
#ifdef DEBUG
|
||
nsIFrame* parent = aChildFrame->GetParent();
|
||
NS_ASSERTION(parent && parent->GetType() == nsGkAtoms::popupSetFrame,
|
||
"Unexpected parent");
|
||
#endif // DEBUG
|
||
|
||
id = nsIFrame::kPopupList;
|
||
#endif // MOZ_XUL
|
||
} else {
|
||
NS_ASSERTION(aChildFrame->IsFloating(), "not a floated frame");
|
||
id = nsIFrame::kFloatList;
|
||
}
|
||
|
||
} else {
|
||
nsIAtom* childType = aChildFrame->GetType();
|
||
if (nsGkAtoms::menuPopupFrame == childType) {
|
||
nsIFrame* parent = aChildFrame->GetParent();
|
||
MOZ_ASSERT(parent, "nsMenuPopupFrame can't be the root frame");
|
||
if (parent) {
|
||
if (parent->GetType() == nsGkAtoms::popupSetFrame) {
|
||
id = nsIFrame::kPopupList;
|
||
} else {
|
||
nsIFrame* firstPopup = parent->GetFirstChild(nsIFrame::kPopupList);
|
||
MOZ_ASSERT(!firstPopup || !firstPopup->GetNextSibling(),
|
||
"We assume popupList only has one child, but it has more.");
|
||
id = firstPopup == aChildFrame
|
||
? nsIFrame::kPopupList
|
||
: nsIFrame::kPrincipalList;
|
||
}
|
||
} else {
|
||
id = nsIFrame::kPrincipalList;
|
||
}
|
||
} else if (nsGkAtoms::tableColGroupFrame == childType) {
|
||
id = nsIFrame::kColGroupList;
|
||
} else if (aChildFrame->IsTableCaption()) {
|
||
id = nsIFrame::kCaptionList;
|
||
} else {
|
||
id = nsIFrame::kPrincipalList;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
// Verify that the frame is actually in that child list or in the
|
||
// corresponding overflow list.
|
||
nsContainerFrame* parent = aChildFrame->GetParent();
|
||
bool found = parent->GetChildList(id).ContainsFrame(aChildFrame);
|
||
if (!found) {
|
||
if (!(aChildFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
||
found = parent->GetChildList(nsIFrame::kOverflowList)
|
||
.ContainsFrame(aChildFrame);
|
||
}
|
||
else if (aChildFrame->IsFloating()) {
|
||
found = parent->GetChildList(nsIFrame::kOverflowOutOfFlowList)
|
||
.ContainsFrame(aChildFrame);
|
||
if (!found) {
|
||
found = parent->GetChildList(nsIFrame::kPushedFloatsList)
|
||
.ContainsFrame(aChildFrame);
|
||
}
|
||
}
|
||
// else it's positioned and should have been on the 'id' child list.
|
||
NS_POSTCONDITION(found, "not in child list");
|
||
}
|
||
#endif
|
||
|
||
return id;
|
||
}
|
||
|
||
/*static*/ nsIFrame*
|
||
nsLayoutUtils::GetBeforeFrameForContent(nsIFrame* aFrame,
|
||
nsIContent* aContent)
|
||
{
|
||
// We need to call GetGenConPseudos() on the first continuation/ib-split.
|
||
// Find it, for symmetry with GetAfterFrameForContent.
|
||
nsContainerFrame* genConParentFrame =
|
||
FirstContinuationOrIBSplitSibling(aFrame)->GetContentInsertionFrame();
|
||
if (!genConParentFrame) {
|
||
return nullptr;
|
||
}
|
||
nsTArray<nsIContent*>* prop = genConParentFrame->GetGenConPseudos();
|
||
if (prop) {
|
||
const nsTArray<nsIContent*>& pseudos(*prop);
|
||
for (uint32_t i = 0; i < pseudos.Length(); ++i) {
|
||
if (pseudos[i]->GetParent() == aContent &&
|
||
pseudos[i]->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentbefore) {
|
||
return pseudos[i]->GetPrimaryFrame();
|
||
}
|
||
}
|
||
}
|
||
// If the first child frame is a pseudo-frame, then try that.
|
||
// Note that the frame we create for the generated content is also a
|
||
// pseudo-frame and so don't drill down in that case.
|
||
nsIFrame* childFrame = genConParentFrame->GetFirstPrincipalChild();
|
||
if (childFrame &&
|
||
childFrame->IsPseudoFrame(aContent) &&
|
||
!childFrame->IsGeneratedContentFrame()) {
|
||
return GetBeforeFrameForContent(childFrame, aContent);
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
/*static*/ nsIFrame*
|
||
nsLayoutUtils::GetBeforeFrame(nsIFrame* aFrame)
|
||
{
|
||
return GetBeforeFrameForContent(aFrame, aFrame->GetContent());
|
||
}
|
||
|
||
/*static*/ nsIFrame*
|
||
nsLayoutUtils::GetAfterFrameForContent(nsIFrame* aFrame,
|
||
nsIContent* aContent)
|
||
{
|
||
// We need to call GetGenConPseudos() on the first continuation,
|
||
// but callers are likely to pass the last.
|
||
nsContainerFrame* genConParentFrame =
|
||
FirstContinuationOrIBSplitSibling(aFrame)->GetContentInsertionFrame();
|
||
if (!genConParentFrame) {
|
||
return nullptr;
|
||
}
|
||
nsTArray<nsIContent*>* prop = genConParentFrame->GetGenConPseudos();
|
||
if (prop) {
|
||
const nsTArray<nsIContent*>& pseudos(*prop);
|
||
for (uint32_t i = 0; i < pseudos.Length(); ++i) {
|
||
if (pseudos[i]->GetParent() == aContent &&
|
||
pseudos[i]->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentafter) {
|
||
return pseudos[i]->GetPrimaryFrame();
|
||
}
|
||
}
|
||
}
|
||
// If the last child frame is a pseudo-frame, then try that.
|
||
// Note that the frame we create for the generated content is also a
|
||
// pseudo-frame and so don't drill down in that case.
|
||
genConParentFrame = aFrame->GetContentInsertionFrame();
|
||
if (!genConParentFrame) {
|
||
return nullptr;
|
||
}
|
||
nsIFrame* lastParentContinuation =
|
||
LastContinuationWithChild(static_cast<nsContainerFrame*>(
|
||
LastContinuationOrIBSplitSibling(genConParentFrame)));
|
||
nsIFrame* childFrame =
|
||
lastParentContinuation->GetLastChild(nsIFrame::kPrincipalList);
|
||
if (childFrame &&
|
||
childFrame->IsPseudoFrame(aContent) &&
|
||
!childFrame->IsGeneratedContentFrame()) {
|
||
return GetAfterFrameForContent(childFrame->FirstContinuation(), aContent);
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
/*static*/ nsIFrame*
|
||
nsLayoutUtils::GetAfterFrame(nsIFrame* aFrame)
|
||
{
|
||
return GetAfterFrameForContent(aFrame, aFrame->GetContent());
|
||
}
|
||
|
||
// static
|
||
nsIFrame*
|
||
nsLayoutUtils::GetClosestFrameOfType(nsIFrame* aFrame, nsIAtom* aFrameType)
|
||
{
|
||
for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent()) {
|
||
if (frame->GetType() == aFrameType) {
|
||
return frame;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
// static
|
||
nsIFrame*
|
||
nsLayoutUtils::GetStyleFrame(nsIFrame* aFrame)
|
||
{
|
||
if (aFrame->GetType() == nsGkAtoms::tableOuterFrame) {
|
||
nsIFrame* inner = aFrame->GetFirstPrincipalChild();
|
||
NS_ASSERTION(inner, "Outer table must have an inner");
|
||
return inner;
|
||
}
|
||
|
||
return aFrame;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetStyleFrame(const nsIContent* aContent)
|
||
{
|
||
nsIFrame *frame = aContent->GetPrimaryFrame();
|
||
if (!frame) {
|
||
return nullptr;
|
||
}
|
||
|
||
return nsLayoutUtils::GetStyleFrame(frame);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetFloatFromPlaceholder(nsIFrame* aFrame) {
|
||
NS_ASSERTION(nsGkAtoms::placeholderFrame == aFrame->GetType(),
|
||
"Must have a placeholder here");
|
||
if (aFrame->GetStateBits() & PLACEHOLDER_FOR_FLOAT) {
|
||
nsIFrame *outOfFlowFrame =
|
||
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
||
NS_ASSERTION(outOfFlowFrame->IsFloating(),
|
||
"How did that happen?");
|
||
return outOfFlowFrame;
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
// static
|
||
bool
|
||
nsLayoutUtils::IsGeneratedContentFor(nsIContent* aContent,
|
||
nsIFrame* aFrame,
|
||
nsIAtom* aPseudoElement)
|
||
{
|
||
NS_PRECONDITION(aFrame, "Must have a frame");
|
||
NS_PRECONDITION(aPseudoElement, "Must have a pseudo name");
|
||
|
||
if (!aFrame->IsGeneratedContentFrame()) {
|
||
return false;
|
||
}
|
||
nsIFrame* parent = aFrame->GetParent();
|
||
NS_ASSERTION(parent, "Generated content can't be root frame");
|
||
if (parent->IsGeneratedContentFrame()) {
|
||
// Not the root of the generated content
|
||
return false;
|
||
}
|
||
|
||
if (aContent && parent->GetContent() != aContent) {
|
||
return false;
|
||
}
|
||
|
||
return (aFrame->GetContent()->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentbefore) ==
|
||
(aPseudoElement == nsCSSPseudoElements::before);
|
||
}
|
||
|
||
// static
|
||
nsIFrame*
|
||
nsLayoutUtils::GetCrossDocParentFrame(const nsIFrame* aFrame,
|
||
nsPoint* aExtraOffset)
|
||
{
|
||
nsIFrame* p = aFrame->GetParent();
|
||
if (p)
|
||
return p;
|
||
|
||
nsView* v = aFrame->GetView();
|
||
if (!v)
|
||
return nullptr;
|
||
v = v->GetParent(); // anonymous inner view
|
||
if (!v)
|
||
return nullptr;
|
||
if (aExtraOffset) {
|
||
*aExtraOffset += v->GetPosition();
|
||
}
|
||
v = v->GetParent(); // subdocumentframe's view
|
||
return v ? v->GetFrame() : nullptr;
|
||
}
|
||
|
||
// static
|
||
bool
|
||
nsLayoutUtils::IsProperAncestorFrameCrossDoc(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
||
nsIFrame* aCommonAncestor)
|
||
{
|
||
if (aFrame == aAncestorFrame)
|
||
return false;
|
||
return IsAncestorFrameCrossDoc(aAncestorFrame, aFrame, aCommonAncestor);
|
||
}
|
||
|
||
// static
|
||
bool
|
||
nsLayoutUtils::IsAncestorFrameCrossDoc(const nsIFrame* aAncestorFrame, const nsIFrame* aFrame,
|
||
const nsIFrame* aCommonAncestor)
|
||
{
|
||
for (const nsIFrame* f = aFrame; f != aCommonAncestor;
|
||
f = GetCrossDocParentFrame(f)) {
|
||
if (f == aAncestorFrame)
|
||
return true;
|
||
}
|
||
return aCommonAncestor == aAncestorFrame;
|
||
}
|
||
|
||
// static
|
||
bool
|
||
nsLayoutUtils::IsProperAncestorFrame(nsIFrame* aAncestorFrame, nsIFrame* aFrame,
|
||
nsIFrame* aCommonAncestor)
|
||
{
|
||
if (aFrame == aAncestorFrame)
|
||
return false;
|
||
for (nsIFrame* f = aFrame; f != aCommonAncestor; f = f->GetParent()) {
|
||
if (f == aAncestorFrame)
|
||
return true;
|
||
}
|
||
return aCommonAncestor == aAncestorFrame;
|
||
}
|
||
|
||
// static
|
||
int32_t
|
||
nsLayoutUtils::DoCompareTreePosition(nsIContent* aContent1,
|
||
nsIContent* aContent2,
|
||
int32_t aIf1Ancestor,
|
||
int32_t aIf2Ancestor,
|
||
const nsIContent* aCommonAncestor)
|
||
{
|
||
NS_PRECONDITION(aContent1, "aContent1 must not be null");
|
||
NS_PRECONDITION(aContent2, "aContent2 must not be null");
|
||
|
||
nsAutoTArray<nsINode*, 32> content1Ancestors;
|
||
nsINode* c1;
|
||
for (c1 = aContent1; c1 && c1 != aCommonAncestor; c1 = c1->GetParentNode()) {
|
||
content1Ancestors.AppendElement(c1);
|
||
}
|
||
if (!c1 && aCommonAncestor) {
|
||
// So, it turns out aCommonAncestor was not an ancestor of c1. Oops.
|
||
// Never mind. We can continue as if aCommonAncestor was null.
|
||
aCommonAncestor = nullptr;
|
||
}
|
||
|
||
nsAutoTArray<nsINode*, 32> content2Ancestors;
|
||
nsINode* c2;
|
||
for (c2 = aContent2; c2 && c2 != aCommonAncestor; c2 = c2->GetParentNode()) {
|
||
content2Ancestors.AppendElement(c2);
|
||
}
|
||
if (!c2 && aCommonAncestor) {
|
||
// So, it turns out aCommonAncestor was not an ancestor of c2.
|
||
// We need to retry with no common ancestor hint.
|
||
return DoCompareTreePosition(aContent1, aContent2,
|
||
aIf1Ancestor, aIf2Ancestor, nullptr);
|
||
}
|
||
|
||
int last1 = content1Ancestors.Length() - 1;
|
||
int last2 = content2Ancestors.Length() - 1;
|
||
nsINode* content1Ancestor = nullptr;
|
||
nsINode* content2Ancestor = nullptr;
|
||
while (last1 >= 0 && last2 >= 0
|
||
&& ((content1Ancestor = content1Ancestors.ElementAt(last1)) ==
|
||
(content2Ancestor = content2Ancestors.ElementAt(last2)))) {
|
||
last1--;
|
||
last2--;
|
||
}
|
||
|
||
if (last1 < 0) {
|
||
if (last2 < 0) {
|
||
NS_ASSERTION(aContent1 == aContent2, "internal error?");
|
||
return 0;
|
||
}
|
||
// aContent1 is an ancestor of aContent2
|
||
return aIf1Ancestor;
|
||
}
|
||
|
||
if (last2 < 0) {
|
||
// aContent2 is an ancestor of aContent1
|
||
return aIf2Ancestor;
|
||
}
|
||
|
||
// content1Ancestor != content2Ancestor, so they must be siblings with the same parent
|
||
nsINode* parent = content1Ancestor->GetParentNode();
|
||
#ifdef DEBUG
|
||
// TODO: remove the uglyness, see bug 598468.
|
||
NS_ASSERTION(gPreventAssertInCompareTreePosition || parent,
|
||
"no common ancestor at all???");
|
||
#endif // DEBUG
|
||
if (!parent) { // different documents??
|
||
return 0;
|
||
}
|
||
|
||
int32_t index1 = parent->IndexOf(content1Ancestor);
|
||
int32_t index2 = parent->IndexOf(content2Ancestor);
|
||
if (index1 < 0 || index2 < 0) {
|
||
// one of them must be anonymous; we can't determine the order
|
||
return 0;
|
||
}
|
||
|
||
return index1 - index2;
|
||
}
|
||
|
||
// static
|
||
nsIFrame*
|
||
nsLayoutUtils::FillAncestors(nsIFrame* aFrame,
|
||
nsIFrame* aStopAtAncestor,
|
||
nsTArray<nsIFrame*>* aAncestors)
|
||
{
|
||
while (aFrame && aFrame != aStopAtAncestor) {
|
||
aAncestors->AppendElement(aFrame);
|
||
aFrame = nsLayoutUtils::GetParentOrPlaceholderFor(aFrame);
|
||
}
|
||
return aFrame;
|
||
}
|
||
|
||
// Return true if aFrame1 is after aFrame2
|
||
static bool IsFrameAfter(nsIFrame* aFrame1, nsIFrame* aFrame2)
|
||
{
|
||
nsIFrame* f = aFrame2;
|
||
do {
|
||
f = f->GetNextSibling();
|
||
if (f == aFrame1)
|
||
return true;
|
||
} while (f);
|
||
return false;
|
||
}
|
||
|
||
// static
|
||
int32_t
|
||
nsLayoutUtils::DoCompareTreePosition(nsIFrame* aFrame1,
|
||
nsIFrame* aFrame2,
|
||
int32_t aIf1Ancestor,
|
||
int32_t aIf2Ancestor,
|
||
nsIFrame* aCommonAncestor)
|
||
{
|
||
NS_PRECONDITION(aFrame1, "aFrame1 must not be null");
|
||
NS_PRECONDITION(aFrame2, "aFrame2 must not be null");
|
||
|
||
nsAutoTArray<nsIFrame*,20> frame2Ancestors;
|
||
nsIFrame* nonCommonAncestor =
|
||
FillAncestors(aFrame2, aCommonAncestor, &frame2Ancestors);
|
||
|
||
return DoCompareTreePosition(aFrame1, aFrame2, frame2Ancestors,
|
||
aIf1Ancestor, aIf2Ancestor,
|
||
nonCommonAncestor ? aCommonAncestor : nullptr);
|
||
}
|
||
|
||
// static
|
||
int32_t
|
||
nsLayoutUtils::DoCompareTreePosition(nsIFrame* aFrame1,
|
||
nsIFrame* aFrame2,
|
||
nsTArray<nsIFrame*>& aFrame2Ancestors,
|
||
int32_t aIf1Ancestor,
|
||
int32_t aIf2Ancestor,
|
||
nsIFrame* aCommonAncestor)
|
||
{
|
||
NS_PRECONDITION(aFrame1, "aFrame1 must not be null");
|
||
NS_PRECONDITION(aFrame2, "aFrame2 must not be null");
|
||
|
||
nsPresContext* presContext = aFrame1->PresContext();
|
||
if (presContext != aFrame2->PresContext()) {
|
||
NS_ERROR("no common ancestor at all, different documents");
|
||
return 0;
|
||
}
|
||
|
||
nsAutoTArray<nsIFrame*,20> frame1Ancestors;
|
||
if (aCommonAncestor &&
|
||
!FillAncestors(aFrame1, aCommonAncestor, &frame1Ancestors)) {
|
||
// We reached the root of the frame tree ... if aCommonAncestor was set,
|
||
// it is wrong
|
||
return DoCompareTreePosition(aFrame1, aFrame2,
|
||
aIf1Ancestor, aIf2Ancestor, nullptr);
|
||
}
|
||
|
||
int32_t last1 = int32_t(frame1Ancestors.Length()) - 1;
|
||
int32_t last2 = int32_t(aFrame2Ancestors.Length()) - 1;
|
||
while (last1 >= 0 && last2 >= 0 &&
|
||
frame1Ancestors[last1] == aFrame2Ancestors[last2]) {
|
||
last1--;
|
||
last2--;
|
||
}
|
||
|
||
if (last1 < 0) {
|
||
if (last2 < 0) {
|
||
NS_ASSERTION(aFrame1 == aFrame2, "internal error?");
|
||
return 0;
|
||
}
|
||
// aFrame1 is an ancestor of aFrame2
|
||
return aIf1Ancestor;
|
||
}
|
||
|
||
if (last2 < 0) {
|
||
// aFrame2 is an ancestor of aFrame1
|
||
return aIf2Ancestor;
|
||
}
|
||
|
||
nsIFrame* ancestor1 = frame1Ancestors[last1];
|
||
nsIFrame* ancestor2 = aFrame2Ancestors[last2];
|
||
// Now we should be able to walk sibling chains to find which one is first
|
||
if (IsFrameAfter(ancestor2, ancestor1))
|
||
return -1;
|
||
if (IsFrameAfter(ancestor1, ancestor2))
|
||
return 1;
|
||
NS_WARNING("Frames were in different child lists???");
|
||
return 0;
|
||
}
|
||
|
||
// static
|
||
nsIFrame* nsLayoutUtils::GetLastSibling(nsIFrame* aFrame) {
|
||
if (!aFrame) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsIFrame* next;
|
||
while ((next = aFrame->GetNextSibling()) != nullptr) {
|
||
aFrame = next;
|
||
}
|
||
return aFrame;
|
||
}
|
||
|
||
// static
|
||
nsView*
|
||
nsLayoutUtils::FindSiblingViewFor(nsView* aParentView, nsIFrame* aFrame) {
|
||
nsIFrame* parentViewFrame = aParentView->GetFrame();
|
||
nsIContent* parentViewContent = parentViewFrame ? parentViewFrame->GetContent() : nullptr;
|
||
for (nsView* insertBefore = aParentView->GetFirstChild(); insertBefore;
|
||
insertBefore = insertBefore->GetNextSibling()) {
|
||
nsIFrame* f = insertBefore->GetFrame();
|
||
if (!f) {
|
||
// this view could be some anonymous view attached to a meaningful parent
|
||
for (nsView* searchView = insertBefore->GetParent(); searchView;
|
||
searchView = searchView->GetParent()) {
|
||
f = searchView->GetFrame();
|
||
if (f) {
|
||
break;
|
||
}
|
||
}
|
||
NS_ASSERTION(f, "Can't find a frame anywhere!");
|
||
}
|
||
if (!f || !aFrame->GetContent() || !f->GetContent() ||
|
||
CompareTreePosition(aFrame->GetContent(), f->GetContent(), parentViewContent) > 0) {
|
||
// aFrame's content is after f's content (or we just don't know),
|
||
// so put our view before f's view
|
||
return insertBefore;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
//static
|
||
nsIScrollableFrame*
|
||
nsLayoutUtils::GetScrollableFrameFor(const nsIFrame *aScrolledFrame)
|
||
{
|
||
nsIFrame *frame = aScrolledFrame->GetParent();
|
||
nsIScrollableFrame *sf = do_QueryFrame(frame);
|
||
return (sf && sf->GetScrolledFrame() == aScrolledFrame) ? sf : nullptr;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetFixedPositionLayerData(Layer* aLayer,
|
||
const nsIFrame* aViewportFrame,
|
||
const nsRect& aAnchorRect,
|
||
const nsIFrame* aFixedPosFrame,
|
||
nsPresContext* aPresContext,
|
||
const ContainerLayerParameters& aContainerParameters) {
|
||
// Find out the rect of the viewport frame relative to the reference frame.
|
||
// This, in conjunction with the container scale, will correspond to the
|
||
// coordinate-space of the built layer.
|
||
float factor = aPresContext->AppUnitsPerDevPixel();
|
||
Rect anchorRect(NSAppUnitsToFloatPixels(aAnchorRect.x, factor) *
|
||
aContainerParameters.mXScale,
|
||
NSAppUnitsToFloatPixels(aAnchorRect.y, factor) *
|
||
aContainerParameters.mYScale,
|
||
NSAppUnitsToFloatPixels(aAnchorRect.width, factor) *
|
||
aContainerParameters.mXScale,
|
||
NSAppUnitsToFloatPixels(aAnchorRect.height, factor) *
|
||
aContainerParameters.mYScale);
|
||
// Need to transform anchorRect from the container layer's coordinate system
|
||
// into aLayer's coordinate system.
|
||
Matrix transform2d;
|
||
if (aLayer->GetTransform().Is2D(&transform2d)) {
|
||
transform2d.Invert();
|
||
anchorRect = transform2d.TransformBounds(anchorRect);
|
||
} else {
|
||
NS_ERROR("3D transform found between fixedpos content and its viewport (should never happen)");
|
||
anchorRect = Rect(0,0,0,0);
|
||
}
|
||
|
||
// Work out the anchor point for this fixed position layer. We assume that
|
||
// any positioning set (left/top/right/bottom) indicates that the
|
||
// corresponding side of its container should be the anchor point,
|
||
// defaulting to top-left.
|
||
LayerPoint anchor(anchorRect.x, anchorRect.y);
|
||
// Make sure the layer is aware of any fixed position margins that have
|
||
// been set.
|
||
nsMargin fixedMargins = aPresContext->PresShell()->GetContentDocumentFixedPositionMargins();
|
||
LayerMargin fixedLayerMargins(NSAppUnitsToFloatPixels(fixedMargins.top, factor) *
|
||
aContainerParameters.mYScale,
|
||
NSAppUnitsToFloatPixels(fixedMargins.right, factor) *
|
||
aContainerParameters.mXScale,
|
||
NSAppUnitsToFloatPixels(fixedMargins.bottom, factor) *
|
||
aContainerParameters.mYScale,
|
||
NSAppUnitsToFloatPixels(fixedMargins.left, factor) *
|
||
aContainerParameters.mXScale);
|
||
|
||
if (aFixedPosFrame != aViewportFrame) {
|
||
const nsStylePosition* position = aFixedPosFrame->StylePosition();
|
||
if (position->mOffset.GetRightUnit() != eStyleUnit_Auto) {
|
||
if (position->mOffset.GetLeftUnit() != eStyleUnit_Auto) {
|
||
anchor.x = anchorRect.x + anchorRect.width / 2.f;
|
||
} else {
|
||
anchor.x = anchorRect.XMost();
|
||
}
|
||
}
|
||
if (position->mOffset.GetBottomUnit() != eStyleUnit_Auto) {
|
||
if (position->mOffset.GetTopUnit() != eStyleUnit_Auto) {
|
||
anchor.y = anchorRect.y + anchorRect.height / 2.f;
|
||
} else {
|
||
anchor.y = anchorRect.YMost();
|
||
}
|
||
}
|
||
|
||
// If the frame is auto-positioned on either axis, set the top/left layer
|
||
// margins to -1, to indicate to the compositor that this layer is
|
||
// unaffected by fixed margins.
|
||
if (position->mOffset.GetLeftUnit() == eStyleUnit_Auto &&
|
||
position->mOffset.GetRightUnit() == eStyleUnit_Auto) {
|
||
fixedLayerMargins.left = -1;
|
||
}
|
||
if (position->mOffset.GetTopUnit() == eStyleUnit_Auto &&
|
||
position->mOffset.GetBottomUnit() == eStyleUnit_Auto) {
|
||
fixedLayerMargins.top = -1;
|
||
}
|
||
}
|
||
|
||
aLayer->SetFixedPositionAnchor(anchor);
|
||
aLayer->SetFixedPositionMargins(fixedLayerMargins);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::ViewportHasDisplayPort(nsPresContext* aPresContext, nsRect* aDisplayPort)
|
||
{
|
||
nsIFrame* rootScrollFrame =
|
||
aPresContext->PresShell()->GetRootScrollFrame();
|
||
return rootScrollFrame &&
|
||
nsLayoutUtils::GetDisplayPort(rootScrollFrame->GetContent(), aDisplayPort);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsFixedPosFrameInDisplayPort(const nsIFrame* aFrame, nsRect* aDisplayPort)
|
||
{
|
||
// Fixed-pos frames are parented by the viewport frame or the page content frame.
|
||
// We'll assume that printing/print preview don't have displayports for their
|
||
// pages!
|
||
nsIFrame* parent = aFrame->GetParent();
|
||
if (!parent || parent->GetParent() ||
|
||
aFrame->StyleDisplay()->mPosition != NS_STYLE_POSITION_FIXED) {
|
||
return false;
|
||
}
|
||
return ViewportHasDisplayPort(aFrame->PresContext(), aDisplayPort);
|
||
}
|
||
|
||
NS_DECLARE_FRAME_PROPERTY(ScrollbarThumbLayerized, nullptr)
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetScrollbarThumbLayerization(nsIFrame* aThumbFrame, bool aLayerize)
|
||
{
|
||
aThumbFrame->Properties().Set(ScrollbarThumbLayerized(),
|
||
reinterpret_cast<void*>(intptr_t(aLayerize)));
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsScrollbarThumbLayerized(nsIFrame* aThumbFrame)
|
||
{
|
||
return reinterpret_cast<intptr_t>(aThumbFrame->Properties().Get(ScrollbarThumbLayerized()));
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetAnimatedGeometryRootForFrame(nsDisplayListBuilder* aBuilder,
|
||
nsIFrame* aFrame,
|
||
const nsIFrame* aStopAtAncestor)
|
||
{
|
||
return aBuilder->FindAnimatedGeometryRootFor(aFrame, aStopAtAncestor);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetAnimatedGeometryRootFor(nsDisplayItem* aItem,
|
||
nsDisplayListBuilder* aBuilder,
|
||
LayerManager* aManager)
|
||
{
|
||
nsIFrame* f = aItem->Frame();
|
||
if (aItem->ShouldFixToViewport(aManager)) {
|
||
// Make its active scrolled root be the active scrolled root of
|
||
// the enclosing viewport, since it shouldn't be scrolled by scrolled
|
||
// frames in its document. InvalidateFixedBackgroundFramesFromList in
|
||
// nsGfxScrollFrame will not repaint this item when scrolling occurs.
|
||
nsIFrame* viewportFrame =
|
||
nsLayoutUtils::GetClosestFrameOfType(f, nsGkAtoms::viewportFrame);
|
||
NS_ASSERTION(viewportFrame, "no viewport???");
|
||
return GetAnimatedGeometryRootForFrame(aBuilder, viewportFrame,
|
||
aBuilder->FindReferenceFrameFor(viewportFrame));
|
||
}
|
||
return GetAnimatedGeometryRootForFrame(aBuilder, f, aItem->ReferenceFrame());
|
||
}
|
||
|
||
// static
|
||
nsIScrollableFrame*
|
||
nsLayoutUtils::GetNearestScrollableFrameForDirection(nsIFrame* aFrame,
|
||
Direction aDirection)
|
||
{
|
||
NS_ASSERTION(aFrame, "GetNearestScrollableFrameForDirection expects a non-null frame");
|
||
for (nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
||
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
||
if (scrollableFrame) {
|
||
ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
||
uint32_t directions = scrollableFrame->GetPerceivedScrollingDirections();
|
||
if (aDirection == eVertical ?
|
||
(ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN &&
|
||
(directions & nsIScrollableFrame::VERTICAL)) :
|
||
(ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN &&
|
||
(directions & nsIScrollableFrame::HORIZONTAL)))
|
||
return scrollableFrame;
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
// static
|
||
nsIScrollableFrame*
|
||
nsLayoutUtils::GetNearestScrollableFrame(nsIFrame* aFrame, uint32_t aFlags)
|
||
{
|
||
NS_ASSERTION(aFrame, "GetNearestScrollableFrame expects a non-null frame");
|
||
for (nsIFrame* f = aFrame; f; f = (aFlags & SCROLLABLE_SAME_DOC) ?
|
||
f->GetParent() : nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
||
nsIScrollableFrame* scrollableFrame = do_QueryFrame(f);
|
||
if (scrollableFrame) {
|
||
if (aFlags & SCROLLABLE_ONLY_ASYNC_SCROLLABLE) {
|
||
if (scrollableFrame->WantAsyncScroll()) {
|
||
return scrollableFrame;
|
||
}
|
||
continue;
|
||
}
|
||
ScrollbarStyles ss = scrollableFrame->GetScrollbarStyles();
|
||
if ((aFlags & SCROLLABLE_INCLUDE_HIDDEN) ||
|
||
ss.mVertical != NS_STYLE_OVERFLOW_HIDDEN ||
|
||
ss.mHorizontal != NS_STYLE_OVERFLOW_HIDDEN)
|
||
return scrollableFrame;
|
||
}
|
||
if (aFlags & SCROLLABLE_ALWAYS_MATCH_ROOT) {
|
||
nsIPresShell* ps = f->PresContext()->PresShell();
|
||
if (ps->GetDocument() && ps->GetDocument()->IsRootDisplayDocument() &&
|
||
ps->GetRootFrame() == f) {
|
||
return ps->GetRootScrollFrameAsScrollable();
|
||
}
|
||
}
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
// static
|
||
nsRect
|
||
nsLayoutUtils::GetScrolledRect(nsIFrame* aScrolledFrame,
|
||
const nsRect& aScrolledFrameOverflowArea,
|
||
const nsSize& aScrollPortSize,
|
||
uint8_t aDirection)
|
||
{
|
||
nscoord x1 = aScrolledFrameOverflowArea.x,
|
||
x2 = aScrolledFrameOverflowArea.XMost(),
|
||
y1 = aScrolledFrameOverflowArea.y,
|
||
y2 = aScrolledFrameOverflowArea.YMost();
|
||
if (y1 < 0) {
|
||
y1 = 0;
|
||
}
|
||
if (aDirection != NS_STYLE_DIRECTION_RTL) {
|
||
if (x1 < 0) {
|
||
x1 = 0;
|
||
}
|
||
} else {
|
||
if (x2 > aScrollPortSize.width) {
|
||
x2 = aScrollPortSize.width;
|
||
}
|
||
// When the scrolled frame chooses a size larger than its available width (because
|
||
// its padding alone is larger than the available width), we need to keep the
|
||
// start-edge of the scroll frame anchored to the start-edge of the scrollport.
|
||
// When the scrolled frame is RTL, this means moving it in our left-based
|
||
// coordinate system, so we need to compensate for its extra width here by
|
||
// effectively repositioning the frame.
|
||
nscoord extraWidth = std::max(0, aScrolledFrame->GetSize().width - aScrollPortSize.width);
|
||
x2 += extraWidth;
|
||
}
|
||
return nsRect(x1, y1, x2 - x1, y2 - y1);
|
||
}
|
||
|
||
//static
|
||
bool
|
||
nsLayoutUtils::HasPseudoStyle(nsIContent* aContent,
|
||
nsStyleContext* aStyleContext,
|
||
nsCSSPseudoElements::Type aPseudoElement,
|
||
nsPresContext* aPresContext)
|
||
{
|
||
NS_PRECONDITION(aPresContext, "Must have a prescontext");
|
||
|
||
nsRefPtr<nsStyleContext> pseudoContext;
|
||
if (aContent) {
|
||
pseudoContext = aPresContext->StyleSet()->
|
||
ProbePseudoElementStyle(aContent->AsElement(), aPseudoElement,
|
||
aStyleContext);
|
||
}
|
||
return pseudoContext != nullptr;
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::GetDOMEventCoordinatesRelativeTo(nsIDOMEvent* aDOMEvent, nsIFrame* aFrame)
|
||
{
|
||
if (!aDOMEvent)
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
WidgetEvent* event = aDOMEvent->GetInternalNSEvent();
|
||
if (!event)
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
return GetEventCoordinatesRelativeTo(event, aFrame);
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::GetEventCoordinatesRelativeTo(const WidgetEvent* aEvent,
|
||
nsIFrame* aFrame)
|
||
{
|
||
if (!aEvent || (aEvent->mClass != eMouseEventClass &&
|
||
aEvent->mClass != eMouseScrollEventClass &&
|
||
aEvent->mClass != eWheelEventClass &&
|
||
aEvent->mClass != eDragEventClass &&
|
||
aEvent->mClass != eSimpleGestureEventClass &&
|
||
aEvent->mClass != ePointerEventClass &&
|
||
aEvent->mClass != eGestureNotifyEventClass &&
|
||
aEvent->mClass != eTouchEventClass &&
|
||
aEvent->mClass != eQueryContentEventClass))
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
|
||
return GetEventCoordinatesRelativeTo(aEvent,
|
||
aEvent->AsGUIEvent()->refPoint,
|
||
aFrame);
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::GetEventCoordinatesRelativeTo(const WidgetEvent* aEvent,
|
||
const LayoutDeviceIntPoint& aPoint,
|
||
nsIFrame* aFrame)
|
||
{
|
||
if (!aFrame) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
nsIWidget* widget = aEvent->AsGUIEvent()->widget;
|
||
if (!widget) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
return GetEventCoordinatesRelativeTo(widget, aPoint, aFrame);
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::GetEventCoordinatesRelativeTo(nsIWidget* aWidget,
|
||
const LayoutDeviceIntPoint& aPoint,
|
||
nsIFrame* aFrame)
|
||
{
|
||
if (!aFrame || !aWidget) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
nsView* view = aFrame->GetView();
|
||
if (view) {
|
||
nsIWidget* frameWidget = view->GetWidget();
|
||
if (frameWidget && frameWidget == aWidget) {
|
||
// Special case this cause it happens a lot.
|
||
// This also fixes bug 664707, events in the extra-special case of select
|
||
// dropdown popups that are transformed.
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
nsPoint pt(presContext->DevPixelsToAppUnits(aPoint.x),
|
||
presContext->DevPixelsToAppUnits(aPoint.y));
|
||
return pt - view->ViewToWidgetOffset();
|
||
}
|
||
}
|
||
|
||
/* If we walk up the frame tree and discover that any of the frames are
|
||
* transformed, we need to do extra work to convert from the global
|
||
* space to the local space.
|
||
*/
|
||
nsIFrame* rootFrame = aFrame;
|
||
bool transformFound = false;
|
||
for (nsIFrame* f = aFrame; f; f = GetCrossDocParentFrame(f)) {
|
||
if (f->IsTransformed()) {
|
||
transformFound = true;
|
||
}
|
||
|
||
rootFrame = f;
|
||
}
|
||
|
||
nsView* rootView = rootFrame->GetView();
|
||
if (!rootView) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
nsPoint widgetToView = TranslateWidgetToView(rootFrame->PresContext(),
|
||
aWidget, aPoint, rootView);
|
||
|
||
if (widgetToView == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
// Convert from root document app units to app units of the document aFrame
|
||
// is in.
|
||
int32_t rootAPD = rootFrame->PresContext()->AppUnitsPerDevPixel();
|
||
int32_t localAPD = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
widgetToView = widgetToView.ScaleToOtherAppUnits(rootAPD, localAPD);
|
||
|
||
/* If we encountered a transform, we can't do simple arithmetic to figure
|
||
* out how to convert back to aFrame's coordinates and must use the CTM.
|
||
*/
|
||
if (transformFound || aFrame->IsSVGText()) {
|
||
return TransformRootPointToFrame(aFrame, widgetToView);
|
||
}
|
||
|
||
/* Otherwise, all coordinate systems are translations of one another,
|
||
* so we can just subtract out the difference.
|
||
*/
|
||
return widgetToView - aFrame->GetOffsetToCrossDoc(rootFrame);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetPopupFrameForEventCoordinates(nsPresContext* aPresContext,
|
||
const WidgetEvent* aEvent)
|
||
{
|
||
#ifdef MOZ_XUL
|
||
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
|
||
if (!pm) {
|
||
return nullptr;
|
||
}
|
||
nsTArray<nsIFrame*> popups;
|
||
pm->GetVisiblePopups(popups);
|
||
uint32_t i;
|
||
// Search from top to bottom
|
||
for (i = 0; i < popups.Length(); i++) {
|
||
nsIFrame* popup = popups[i];
|
||
if (popup->PresContext()->GetRootPresContext() == aPresContext &&
|
||
popup->GetScrollableOverflowRect().Contains(
|
||
GetEventCoordinatesRelativeTo(aEvent, popup))) {
|
||
return popup;
|
||
}
|
||
}
|
||
#endif
|
||
return nullptr;
|
||
}
|
||
|
||
static void ConstrainToCoordValues(float& aStart, float& aSize)
|
||
{
|
||
MOZ_ASSERT(aSize >= 0);
|
||
|
||
// Here we try to make sure that the resulting nsRect will continue to cover
|
||
// as much of the area that was covered by the original gfx Rect as possible.
|
||
|
||
// We clamp the bounds of the rect to {nscoord_MIN,nscoord_MAX} since
|
||
// nsRect::X/Y() and nsRect::XMost/YMost() can't return values outwith this
|
||
// range:
|
||
float end = aStart + aSize;
|
||
aStart = clamped(aStart, float(nscoord_MIN), float(nscoord_MAX));
|
||
end = clamped(end, float(nscoord_MIN), float(nscoord_MAX));
|
||
|
||
aSize = end - aStart;
|
||
|
||
// We must also clamp aSize to {0,nscoord_MAX} since nsRect::Width/Height()
|
||
// can't return a value greater than nscoord_MAX. If aSize is greater than
|
||
// nscoord_MAX then we reduce it to nscoord_MAX while keeping the rect
|
||
// centered:
|
||
if (aSize > nscoord_MAX) {
|
||
float excess = aSize - nscoord_MAX;
|
||
excess /= 2;
|
||
aStart += excess;
|
||
aSize = nscoord_MAX;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Given a gfxFloat, constrains its value to be between nscoord_MIN and nscoord_MAX.
|
||
*
|
||
* @param aVal The value to constrain (in/out)
|
||
*/
|
||
static void ConstrainToCoordValues(gfxFloat& aVal)
|
||
{
|
||
if (aVal <= nscoord_MIN)
|
||
aVal = nscoord_MIN;
|
||
else if (aVal >= nscoord_MAX)
|
||
aVal = nscoord_MAX;
|
||
}
|
||
|
||
static void ConstrainToCoordValues(gfxFloat& aStart, gfxFloat& aSize)
|
||
{
|
||
gfxFloat max = aStart + aSize;
|
||
|
||
// Clamp the end points to within nscoord range
|
||
ConstrainToCoordValues(aStart);
|
||
ConstrainToCoordValues(max);
|
||
|
||
aSize = max - aStart;
|
||
// If the width if still greater than the max nscoord, then bring both
|
||
// endpoints in by the same amount until it fits.
|
||
if (aSize > nscoord_MAX) {
|
||
gfxFloat excess = aSize - nscoord_MAX;
|
||
excess /= 2;
|
||
|
||
aStart += excess;
|
||
aSize = nscoord_MAX;
|
||
} else if (aSize < nscoord_MIN) {
|
||
gfxFloat excess = aSize - nscoord_MIN;
|
||
excess /= 2;
|
||
|
||
aStart -= excess;
|
||
aSize = nscoord_MIN;
|
||
}
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::RoundGfxRectToAppRect(const Rect &aRect, float aFactor)
|
||
{
|
||
/* Get a new Rect whose units are app units by scaling by the specified factor. */
|
||
Rect scaledRect = aRect;
|
||
scaledRect.ScaleRoundOut(aFactor);
|
||
|
||
/* We now need to constrain our results to the max and min values for coords. */
|
||
ConstrainToCoordValues(scaledRect.x, scaledRect.width);
|
||
ConstrainToCoordValues(scaledRect.y, scaledRect.height);
|
||
|
||
/* Now typecast everything back. This is guaranteed to be safe. */
|
||
return nsRect(nscoord(scaledRect.X()), nscoord(scaledRect.Y()),
|
||
nscoord(scaledRect.Width()), nscoord(scaledRect.Height()));
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::RoundGfxRectToAppRect(const gfxRect &aRect, float aFactor)
|
||
{
|
||
/* Get a new gfxRect whose units are app units by scaling by the specified factor. */
|
||
gfxRect scaledRect = aRect;
|
||
scaledRect.ScaleRoundOut(aFactor);
|
||
|
||
/* We now need to constrain our results to the max and min values for coords. */
|
||
ConstrainToCoordValues(scaledRect.x, scaledRect.width);
|
||
ConstrainToCoordValues(scaledRect.y, scaledRect.height);
|
||
|
||
/* Now typecast everything back. This is guaranteed to be safe. */
|
||
return nsRect(nscoord(scaledRect.X()), nscoord(scaledRect.Y()),
|
||
nscoord(scaledRect.Width()), nscoord(scaledRect.Height()));
|
||
}
|
||
|
||
|
||
nsRegion
|
||
nsLayoutUtils::RoundedRectIntersectRect(const nsRect& aRoundedRect,
|
||
const nscoord aRadii[8],
|
||
const nsRect& aContainedRect)
|
||
{
|
||
// rectFullHeight and rectFullWidth together will approximately contain
|
||
// the total area of the frame minus the rounded corners.
|
||
nsRect rectFullHeight = aRoundedRect;
|
||
nscoord xDiff = std::max(aRadii[NS_CORNER_TOP_LEFT_X], aRadii[NS_CORNER_BOTTOM_LEFT_X]);
|
||
rectFullHeight.x += xDiff;
|
||
rectFullHeight.width -= std::max(aRadii[NS_CORNER_TOP_RIGHT_X],
|
||
aRadii[NS_CORNER_BOTTOM_RIGHT_X]) + xDiff;
|
||
nsRect r1;
|
||
r1.IntersectRect(rectFullHeight, aContainedRect);
|
||
|
||
nsRect rectFullWidth = aRoundedRect;
|
||
nscoord yDiff = std::max(aRadii[NS_CORNER_TOP_LEFT_Y], aRadii[NS_CORNER_TOP_RIGHT_Y]);
|
||
rectFullWidth.y += yDiff;
|
||
rectFullWidth.height -= std::max(aRadii[NS_CORNER_BOTTOM_LEFT_Y],
|
||
aRadii[NS_CORNER_BOTTOM_RIGHT_Y]) + yDiff;
|
||
nsRect r2;
|
||
r2.IntersectRect(rectFullWidth, aContainedRect);
|
||
|
||
nsRegion result;
|
||
result.Or(r1, r2);
|
||
return result;
|
||
}
|
||
|
||
nsIntRegion
|
||
nsLayoutUtils::RoundedRectIntersectIntRect(const nsIntRect& aRoundedRect,
|
||
const RectCornerRadii& aCornerRadii,
|
||
const nsIntRect& aContainedRect)
|
||
{
|
||
// rectFullHeight and rectFullWidth together will approximately contain
|
||
// the total area of the frame minus the rounded corners.
|
||
nsIntRect rectFullHeight = aRoundedRect;
|
||
uint32_t xDiff = std::max(aCornerRadii.TopLeft().width,
|
||
aCornerRadii.BottomLeft().width);
|
||
rectFullHeight.x += xDiff;
|
||
rectFullHeight.width -= std::max(aCornerRadii.TopRight().width,
|
||
aCornerRadii.BottomRight().width) + xDiff;
|
||
nsIntRect r1;
|
||
r1.IntersectRect(rectFullHeight, aContainedRect);
|
||
|
||
nsIntRect rectFullWidth = aRoundedRect;
|
||
uint32_t yDiff = std::max(aCornerRadii.TopLeft().height,
|
||
aCornerRadii.TopRight().height);
|
||
rectFullWidth.y += yDiff;
|
||
rectFullWidth.height -= std::max(aCornerRadii.BottomLeft().height,
|
||
aCornerRadii.BottomRight().height) + yDiff;
|
||
nsIntRect r2;
|
||
r2.IntersectRect(rectFullWidth, aContainedRect);
|
||
|
||
nsIntRegion result;
|
||
result.Or(r1, r2);
|
||
return result;
|
||
}
|
||
|
||
// Helper for RoundedRectIntersectsRect.
|
||
static bool
|
||
CheckCorner(nscoord aXOffset, nscoord aYOffset,
|
||
nscoord aXRadius, nscoord aYRadius)
|
||
{
|
||
MOZ_ASSERT(aXOffset > 0 && aYOffset > 0,
|
||
"must not pass nonpositives to CheckCorner");
|
||
MOZ_ASSERT(aXRadius >= 0 && aYRadius >= 0,
|
||
"must not pass negatives to CheckCorner");
|
||
|
||
// Avoid floating point math unless we're either (1) within the
|
||
// quarter-ellipse area at the rounded corner or (2) outside the
|
||
// rounding.
|
||
if (aXOffset >= aXRadius || aYOffset >= aYRadius)
|
||
return true;
|
||
|
||
// Convert coordinates to a unit circle with (0,0) as the center of
|
||
// curvature, and see if we're inside the circle or outside.
|
||
float scaledX = float(aXRadius - aXOffset) / float(aXRadius);
|
||
float scaledY = float(aYRadius - aYOffset) / float(aYRadius);
|
||
return scaledX * scaledX + scaledY * scaledY < 1.0f;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::RoundedRectIntersectsRect(const nsRect& aRoundedRect,
|
||
const nscoord aRadii[8],
|
||
const nsRect& aTestRect)
|
||
{
|
||
if (!aTestRect.Intersects(aRoundedRect))
|
||
return false;
|
||
|
||
// distances from this edge of aRoundedRect to opposite edge of aTestRect,
|
||
// which we know are positive due to the Intersects check above.
|
||
nsMargin insets;
|
||
insets.top = aTestRect.YMost() - aRoundedRect.y;
|
||
insets.right = aRoundedRect.XMost() - aTestRect.x;
|
||
insets.bottom = aRoundedRect.YMost() - aTestRect.y;
|
||
insets.left = aTestRect.XMost() - aRoundedRect.x;
|
||
|
||
// Check whether the bottom-right corner of aTestRect is inside the
|
||
// top left corner of aBounds when rounded by aRadii, etc. If any
|
||
// corner is not, then fail; otherwise succeed.
|
||
return CheckCorner(insets.left, insets.top,
|
||
aRadii[NS_CORNER_TOP_LEFT_X],
|
||
aRadii[NS_CORNER_TOP_LEFT_Y]) &&
|
||
CheckCorner(insets.right, insets.top,
|
||
aRadii[NS_CORNER_TOP_RIGHT_X],
|
||
aRadii[NS_CORNER_TOP_RIGHT_Y]) &&
|
||
CheckCorner(insets.right, insets.bottom,
|
||
aRadii[NS_CORNER_BOTTOM_RIGHT_X],
|
||
aRadii[NS_CORNER_BOTTOM_RIGHT_Y]) &&
|
||
CheckCorner(insets.left, insets.bottom,
|
||
aRadii[NS_CORNER_BOTTOM_LEFT_X],
|
||
aRadii[NS_CORNER_BOTTOM_LEFT_Y]);
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::MatrixTransformRectOut(const nsRect &aBounds,
|
||
const gfx3DMatrix &aMatrix, float aFactor)
|
||
{
|
||
nsRect outside = aBounds;
|
||
outside.ScaleRoundOut(1/aFactor);
|
||
gfxRect image = aMatrix.TransformBounds(gfxRect(outside.x,
|
||
outside.y,
|
||
outside.width,
|
||
outside.height));
|
||
return RoundGfxRectToAppRect(image, aFactor);
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::MatrixTransformRect(const nsRect &aBounds,
|
||
const gfx3DMatrix &aMatrix, float aFactor)
|
||
{
|
||
gfxRect image = aMatrix.TransformBounds(gfxRect(NSAppUnitsToDoublePixels(aBounds.x, aFactor),
|
||
NSAppUnitsToDoublePixels(aBounds.y, aFactor),
|
||
NSAppUnitsToDoublePixels(aBounds.width, aFactor),
|
||
NSAppUnitsToDoublePixels(aBounds.height, aFactor)));
|
||
|
||
return RoundGfxRectToAppRect(image, aFactor);
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::MatrixTransformPoint(const nsPoint &aPoint,
|
||
const gfx3DMatrix &aMatrix, float aFactor)
|
||
{
|
||
gfxPoint image = aMatrix.Transform(gfxPoint(NSAppUnitsToFloatPixels(aPoint.x, aFactor),
|
||
NSAppUnitsToFloatPixels(aPoint.y, aFactor)));
|
||
return nsPoint(NSFloatPixelsToAppUnits(float(image.x), aFactor),
|
||
NSFloatPixelsToAppUnits(float(image.y), aFactor));
|
||
}
|
||
|
||
Matrix4x4
|
||
nsLayoutUtils::GetTransformToAncestor(nsIFrame *aFrame, const nsIFrame *aAncestor)
|
||
{
|
||
nsIFrame* parent;
|
||
Matrix4x4 ctm;
|
||
if (aFrame == aAncestor) {
|
||
return ctm;
|
||
}
|
||
ctm = aFrame->GetTransformMatrix(aAncestor, &parent);
|
||
while (parent && parent != aAncestor) {
|
||
if (!parent->Preserves3DChildren()) {
|
||
ctm.ProjectTo2D();
|
||
}
|
||
ctm = ctm * parent->GetTransformMatrix(aAncestor, &parent);
|
||
}
|
||
return ctm;
|
||
}
|
||
|
||
gfxSize
|
||
nsLayoutUtils::GetTransformToAncestorScale(nsIFrame* aFrame)
|
||
{
|
||
Matrix4x4 transform = GetTransformToAncestor(aFrame,
|
||
nsLayoutUtils::GetDisplayRootFrame(aFrame));
|
||
Matrix transform2D;
|
||
if (transform.Is2D(&transform2D)) {
|
||
return ThebesMatrix(transform2D).ScaleFactors(true);
|
||
}
|
||
return gfxSize(1, 1);
|
||
}
|
||
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::FindNearestCommonAncestorFrame(nsIFrame* aFrame1, nsIFrame* aFrame2)
|
||
{
|
||
nsAutoTArray<nsIFrame*,100> ancestors1;
|
||
nsAutoTArray<nsIFrame*,100> ancestors2;
|
||
nsIFrame* commonAncestor = nullptr;
|
||
if (aFrame1->PresContext() == aFrame2->PresContext()) {
|
||
commonAncestor = aFrame1->PresContext()->PresShell()->GetRootFrame();
|
||
}
|
||
for (nsIFrame* f = aFrame1; f != commonAncestor;
|
||
f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
||
ancestors1.AppendElement(f);
|
||
}
|
||
for (nsIFrame* f = aFrame2; f != commonAncestor;
|
||
f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
|
||
ancestors2.AppendElement(f);
|
||
}
|
||
uint32_t minLengths = std::min(ancestors1.Length(), ancestors2.Length());
|
||
for (uint32_t i = 1; i <= minLengths; ++i) {
|
||
if (ancestors1[ancestors1.Length() - i] == ancestors2[ancestors2.Length() - i]) {
|
||
commonAncestor = ancestors1[ancestors1.Length() - i];
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
return commonAncestor;
|
||
}
|
||
|
||
nsLayoutUtils::TransformResult
|
||
nsLayoutUtils::TransformPoints(nsIFrame* aFromFrame, nsIFrame* aToFrame,
|
||
uint32_t aPointCount, CSSPoint* aPoints)
|
||
{
|
||
nsIFrame* nearestCommonAncestor = FindNearestCommonAncestorFrame(aFromFrame, aToFrame);
|
||
if (!nearestCommonAncestor) {
|
||
return NO_COMMON_ANCESTOR;
|
||
}
|
||
Matrix4x4 downToDest = GetTransformToAncestor(aToFrame, nearestCommonAncestor);
|
||
if (downToDest.IsSingular()) {
|
||
return NONINVERTIBLE_TRANSFORM;
|
||
}
|
||
downToDest.Invert();
|
||
Matrix4x4 upToAncestor = GetTransformToAncestor(aFromFrame, nearestCommonAncestor);
|
||
CSSToLayoutDeviceScale devPixelsPerCSSPixelFromFrame(
|
||
double(nsPresContext::AppUnitsPerCSSPixel())/
|
||
aFromFrame->PresContext()->AppUnitsPerDevPixel());
|
||
CSSToLayoutDeviceScale devPixelsPerCSSPixelToFrame(
|
||
double(nsPresContext::AppUnitsPerCSSPixel())/
|
||
aToFrame->PresContext()->AppUnitsPerDevPixel());
|
||
for (uint32_t i = 0; i < aPointCount; ++i) {
|
||
LayoutDevicePoint devPixels = aPoints[i] * devPixelsPerCSSPixelFromFrame;
|
||
// What should the behaviour be if some of the points aren't invertible
|
||
// and others are? Just assume all points are for now.
|
||
Point toDevPixels = downToDest.ProjectPoint(
|
||
(upToAncestor * Point(devPixels.x, devPixels.y))).As2DPoint();
|
||
// Divide here so that when the devPixelsPerCSSPixels are the same, we get the correct
|
||
// answer instead of some inaccuracy multiplying a number by its reciprocal.
|
||
aPoints[i] = LayoutDevicePoint(toDevPixels.x, toDevPixels.y) /
|
||
devPixelsPerCSSPixelToFrame;
|
||
}
|
||
return TRANSFORM_SUCCEEDED;
|
||
}
|
||
|
||
nsLayoutUtils::TransformResult
|
||
nsLayoutUtils::TransformPoint(nsIFrame* aFromFrame, nsIFrame* aToFrame,
|
||
nsPoint& aPoint)
|
||
{
|
||
nsIFrame* nearestCommonAncestor = FindNearestCommonAncestorFrame(aFromFrame, aToFrame);
|
||
if (!nearestCommonAncestor) {
|
||
return NO_COMMON_ANCESTOR;
|
||
}
|
||
Matrix4x4 downToDest = GetTransformToAncestor(aToFrame, nearestCommonAncestor);
|
||
if (downToDest.IsSingular()) {
|
||
return NONINVERTIBLE_TRANSFORM;
|
||
}
|
||
downToDest.Invert();
|
||
Matrix4x4 upToAncestor = GetTransformToAncestor(aFromFrame, nearestCommonAncestor);
|
||
|
||
float devPixelsPerAppUnitFromFrame =
|
||
1.0f / aFromFrame->PresContext()->AppUnitsPerDevPixel();
|
||
float devPixelsPerAppUnitToFrame =
|
||
1.0f / aToFrame->PresContext()->AppUnitsPerDevPixel();
|
||
Point4D toDevPixels = downToDest.ProjectPoint(
|
||
upToAncestor * Point(aPoint.x * devPixelsPerAppUnitFromFrame,
|
||
aPoint.y * devPixelsPerAppUnitFromFrame));
|
||
if (!toDevPixels.HasPositiveWCoord()) {
|
||
// Not strictly true, but we failed to get a valid point in this
|
||
// coordinate space.
|
||
return NONINVERTIBLE_TRANSFORM;
|
||
}
|
||
aPoint.x = NSToCoordRound(toDevPixels.x / devPixelsPerAppUnitToFrame);
|
||
aPoint.y = NSToCoordRound(toDevPixels.y / devPixelsPerAppUnitToFrame);
|
||
return TRANSFORM_SUCCEEDED;
|
||
}
|
||
|
||
nsLayoutUtils::TransformResult
|
||
nsLayoutUtils::TransformRect(nsIFrame* aFromFrame, nsIFrame* aToFrame,
|
||
nsRect& aRect)
|
||
{
|
||
nsIFrame* nearestCommonAncestor = FindNearestCommonAncestorFrame(aFromFrame, aToFrame);
|
||
if (!nearestCommonAncestor) {
|
||
return NO_COMMON_ANCESTOR;
|
||
}
|
||
Matrix4x4 downToDest = GetTransformToAncestor(aToFrame, nearestCommonAncestor);
|
||
if (downToDest.IsSingular()) {
|
||
return NONINVERTIBLE_TRANSFORM;
|
||
}
|
||
downToDest.Invert();
|
||
Matrix4x4 upToAncestor = GetTransformToAncestor(aFromFrame, nearestCommonAncestor);
|
||
|
||
float devPixelsPerAppUnitFromFrame =
|
||
1.0f / aFromFrame->PresContext()->AppUnitsPerDevPixel();
|
||
float devPixelsPerAppUnitToFrame =
|
||
1.0f / aToFrame->PresContext()->AppUnitsPerDevPixel();
|
||
gfx::Rect toDevPixels = downToDest.ProjectRectBounds(
|
||
upToAncestor.ProjectRectBounds(
|
||
gfx::Rect(aRect.x * devPixelsPerAppUnitFromFrame,
|
||
aRect.y * devPixelsPerAppUnitFromFrame,
|
||
aRect.width * devPixelsPerAppUnitFromFrame,
|
||
aRect.height * devPixelsPerAppUnitFromFrame),
|
||
Rect(-std::numeric_limits<Float>::max() * 0.5f,
|
||
-std::numeric_limits<Float>::max() * 0.5f,
|
||
std::numeric_limits<Float>::max(),
|
||
std::numeric_limits<Float>::max())),
|
||
Rect(-std::numeric_limits<Float>::max() * devPixelsPerAppUnitFromFrame * 0.5f,
|
||
-std::numeric_limits<Float>::max() * devPixelsPerAppUnitFromFrame * 0.5f,
|
||
std::numeric_limits<Float>::max() * devPixelsPerAppUnitFromFrame,
|
||
std::numeric_limits<Float>::max() * devPixelsPerAppUnitFromFrame));
|
||
aRect.x = toDevPixels.x / devPixelsPerAppUnitToFrame;
|
||
aRect.y = toDevPixels.y / devPixelsPerAppUnitToFrame;
|
||
aRect.width = toDevPixels.width / devPixelsPerAppUnitToFrame;
|
||
aRect.height = toDevPixels.height / devPixelsPerAppUnitToFrame;
|
||
return TRANSFORM_SUCCEEDED;
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::GetRectRelativeToFrame(Element* aElement, nsIFrame* aFrame)
|
||
{
|
||
if (!aElement || !aFrame) {
|
||
return nsRect();
|
||
}
|
||
|
||
nsIFrame* frame = aElement->GetPrimaryFrame();
|
||
if (!frame) {
|
||
return nsRect();
|
||
}
|
||
|
||
nsRect rect = frame->GetRectRelativeToSelf();
|
||
nsLayoutUtils::TransformResult rv =
|
||
nsLayoutUtils::TransformRect(frame, aFrame, rect);
|
||
if (rv != nsLayoutUtils::TRANSFORM_SUCCEEDED) {
|
||
return nsRect();
|
||
}
|
||
|
||
return rect;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::ContainsPoint(const nsRect& aRect, const nsPoint& aPoint,
|
||
nscoord aInflateSize)
|
||
{
|
||
nsRect rect = aRect;
|
||
rect.Inflate(aInflateSize);
|
||
return rect.Contains(aPoint);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsRectVisibleInScrollFrames(nsIFrame* aFrame, const nsRect& aRect)
|
||
{
|
||
return !ClampRectToScrollFrames(aFrame, aRect).IsEmpty();
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::ClampRectToScrollFrames(nsIFrame* aFrame, const nsRect& aRect)
|
||
{
|
||
nsIFrame* closestScrollFrame =
|
||
nsLayoutUtils::GetClosestFrameOfType(aFrame, nsGkAtoms::scrollFrame);
|
||
|
||
nsRect resultRect = aRect;
|
||
|
||
while (closestScrollFrame) {
|
||
nsIScrollableFrame* sf = do_QueryFrame(closestScrollFrame);
|
||
|
||
nsRect scrollPortRect = sf->GetScrollPortRect();
|
||
nsLayoutUtils::TransformRect(closestScrollFrame, aFrame, scrollPortRect);
|
||
|
||
resultRect = resultRect.Intersect(scrollPortRect);
|
||
|
||
// Check whether aRect is visible in the scroll frame or not.
|
||
if (resultRect.IsEmpty()) {
|
||
break;
|
||
}
|
||
|
||
// Get next ancestor scroll frame.
|
||
closestScrollFrame =
|
||
nsLayoutUtils::GetClosestFrameOfType(closestScrollFrame->GetParent(),
|
||
nsGkAtoms::scrollFrame);
|
||
}
|
||
|
||
return resultRect;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::GetLayerTransformForFrame(nsIFrame* aFrame,
|
||
Matrix4x4* aTransform)
|
||
{
|
||
// FIXME/bug 796690: we can sometimes compute a transform in these
|
||
// cases, it just increases complexity considerably. Punt for now.
|
||
if (aFrame->Preserves3DChildren() || aFrame->HasTransformGetter()) {
|
||
return false;
|
||
}
|
||
|
||
nsIFrame* root = nsLayoutUtils::GetDisplayRootFrame(aFrame);
|
||
if (root->HasAnyStateBits(NS_FRAME_UPDATE_LAYER_TREE)) {
|
||
// Content may have been invalidated, so we can't reliably compute
|
||
// the "layer transform" in general.
|
||
return false;
|
||
}
|
||
// If the caller doesn't care about the value, early-return to skip
|
||
// overhead below.
|
||
if (!aTransform) {
|
||
return true;
|
||
}
|
||
|
||
nsDisplayListBuilder builder(root, nsDisplayListBuilder::OTHER,
|
||
false/*don't build caret*/);
|
||
nsDisplayList list;
|
||
nsDisplayTransform* item =
|
||
new (&builder) nsDisplayTransform(&builder, aFrame, &list, nsRect());
|
||
|
||
*aTransform = item->GetTransform();
|
||
item->~nsDisplayTransform();
|
||
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
TransformGfxPointFromAncestor(nsIFrame *aFrame,
|
||
const Point &aPoint,
|
||
nsIFrame *aAncestor,
|
||
Point* aOut)
|
||
{
|
||
Matrix4x4 ctm = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestor);
|
||
ctm.Invert();
|
||
Point4D point = ctm.ProjectPoint(aPoint);
|
||
if (!point.HasPositiveWCoord()) {
|
||
return false;
|
||
}
|
||
*aOut = point.As2DPoint();
|
||
return true;
|
||
}
|
||
|
||
static Rect
|
||
TransformGfxRectToAncestor(nsIFrame *aFrame,
|
||
const Rect &aRect,
|
||
const nsIFrame *aAncestor,
|
||
bool* aPreservesAxisAlignedRectangles = nullptr)
|
||
{
|
||
Matrix4x4 ctm = nsLayoutUtils::GetTransformToAncestor(aFrame, aAncestor);
|
||
if (aPreservesAxisAlignedRectangles) {
|
||
Matrix matrix2d;
|
||
*aPreservesAxisAlignedRectangles =
|
||
ctm.Is2D(&matrix2d) && matrix2d.PreservesAxisAlignedRectangles();
|
||
}
|
||
return ctm.TransformBounds(aRect);
|
||
}
|
||
|
||
static SVGTextFrame*
|
||
GetContainingSVGTextFrame(nsIFrame* aFrame)
|
||
{
|
||
if (!aFrame->IsSVGText()) {
|
||
return nullptr;
|
||
}
|
||
|
||
return static_cast<SVGTextFrame*>
|
||
(nsLayoutUtils::GetClosestFrameOfType(aFrame->GetParent(),
|
||
nsGkAtoms::svgTextFrame));
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::TransformAncestorPointToFrame(nsIFrame* aFrame,
|
||
const nsPoint& aPoint,
|
||
nsIFrame* aAncestor)
|
||
{
|
||
SVGTextFrame* text = GetContainingSVGTextFrame(aFrame);
|
||
|
||
float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
Point result(NSAppUnitsToFloatPixels(aPoint.x, factor),
|
||
NSAppUnitsToFloatPixels(aPoint.y, factor));
|
||
|
||
if (text) {
|
||
if (!TransformGfxPointFromAncestor(text, result, aAncestor, &result)) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
result = text->TransformFramePointToTextChild(result, aFrame);
|
||
} else {
|
||
if (!TransformGfxPointFromAncestor(aFrame, result, nullptr, &result)) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
}
|
||
|
||
return nsPoint(NSFloatPixelsToAppUnits(float(result.x), factor),
|
||
NSFloatPixelsToAppUnits(float(result.y), factor));
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::TransformFrameRectToAncestor(nsIFrame* aFrame,
|
||
const nsRect& aRect,
|
||
const nsIFrame* aAncestor,
|
||
bool* aPreservesAxisAlignedRectangles /* = nullptr */)
|
||
{
|
||
SVGTextFrame* text = GetContainingSVGTextFrame(aFrame);
|
||
|
||
float srcAppUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
Rect result;
|
||
|
||
if (text) {
|
||
result = ToRect(text->TransformFrameRectFromTextChild(aRect, aFrame));
|
||
result = TransformGfxRectToAncestor(text, result, aAncestor);
|
||
// TransformFrameRectFromTextChild could involve any kind of transform, we
|
||
// could drill down into it to get an answer out of it but we don't yet.
|
||
if (aPreservesAxisAlignedRectangles)
|
||
*aPreservesAxisAlignedRectangles = false;
|
||
} else {
|
||
result = Rect(NSAppUnitsToFloatPixels(aRect.x, srcAppUnitsPerDevPixel),
|
||
NSAppUnitsToFloatPixels(aRect.y, srcAppUnitsPerDevPixel),
|
||
NSAppUnitsToFloatPixels(aRect.width, srcAppUnitsPerDevPixel),
|
||
NSAppUnitsToFloatPixels(aRect.height, srcAppUnitsPerDevPixel));
|
||
result = TransformGfxRectToAncestor(aFrame, result, aAncestor, aPreservesAxisAlignedRectangles);
|
||
}
|
||
|
||
float destAppUnitsPerDevPixel = aAncestor->PresContext()->AppUnitsPerDevPixel();
|
||
return nsRect(NSFloatPixelsToAppUnits(float(result.x), destAppUnitsPerDevPixel),
|
||
NSFloatPixelsToAppUnits(float(result.y), destAppUnitsPerDevPixel),
|
||
NSFloatPixelsToAppUnits(float(result.width), destAppUnitsPerDevPixel),
|
||
NSFloatPixelsToAppUnits(float(result.height), destAppUnitsPerDevPixel));
|
||
}
|
||
|
||
static LayoutDeviceIntPoint GetWidgetOffset(nsIWidget* aWidget, nsIWidget*& aRootWidget) {
|
||
LayoutDeviceIntPoint offset(0, 0);
|
||
while ((aWidget->WindowType() == eWindowType_child ||
|
||
aWidget->IsPlugin())) {
|
||
nsIWidget* parent = aWidget->GetParent();
|
||
if (!parent) {
|
||
break;
|
||
}
|
||
nsIntRect bounds;
|
||
aWidget->GetBounds(bounds);
|
||
offset += LayoutDeviceIntPoint::FromUntyped(bounds.TopLeft());
|
||
aWidget = parent;
|
||
}
|
||
aRootWidget = aWidget;
|
||
return offset;
|
||
}
|
||
|
||
static LayoutDeviceIntPoint
|
||
WidgetToWidgetOffset(nsIWidget* aFrom, nsIWidget* aTo) {
|
||
nsIWidget* fromRoot;
|
||
LayoutDeviceIntPoint fromOffset = GetWidgetOffset(aFrom, fromRoot);
|
||
nsIWidget* toRoot;
|
||
LayoutDeviceIntPoint toOffset = GetWidgetOffset(aTo, toRoot);
|
||
|
||
if (fromRoot == toRoot) {
|
||
return fromOffset - toOffset;
|
||
}
|
||
return aFrom->WidgetToScreenOffset() - aTo->WidgetToScreenOffset();
|
||
}
|
||
|
||
nsPoint
|
||
nsLayoutUtils::TranslateWidgetToView(nsPresContext* aPresContext,
|
||
nsIWidget* aWidget, const LayoutDeviceIntPoint& aPt,
|
||
nsView* aView)
|
||
{
|
||
nsPoint viewOffset;
|
||
nsIWidget* viewWidget = aView->GetNearestWidget(&viewOffset);
|
||
if (!viewWidget) {
|
||
return nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
LayoutDeviceIntPoint widgetPoint = aPt + WidgetToWidgetOffset(aWidget, viewWidget);
|
||
nsPoint widgetAppUnits(aPresContext->DevPixelsToAppUnits(widgetPoint.x),
|
||
aPresContext->DevPixelsToAppUnits(widgetPoint.y));
|
||
return widgetAppUnits - viewOffset;
|
||
}
|
||
|
||
LayoutDeviceIntPoint
|
||
nsLayoutUtils::TranslateViewToWidget(nsPresContext* aPresContext,
|
||
nsView* aView, nsPoint aPt,
|
||
nsIWidget* aWidget)
|
||
{
|
||
nsPoint viewOffset;
|
||
nsIWidget* viewWidget = aView->GetNearestWidget(&viewOffset);
|
||
if (!viewWidget) {
|
||
return LayoutDeviceIntPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
|
||
}
|
||
|
||
LayoutDeviceIntPoint relativeToViewWidget(aPresContext->AppUnitsToDevPixels(aPt.x + viewOffset.x),
|
||
aPresContext->AppUnitsToDevPixels(aPt.y + viewOffset.y));
|
||
return relativeToViewWidget + WidgetToWidgetOffset(viewWidget, aWidget);
|
||
}
|
||
|
||
// Combine aNewBreakType with aOrigBreakType, but limit the break types
|
||
// to NS_STYLE_CLEAR_LEFT, RIGHT, BOTH.
|
||
uint8_t
|
||
nsLayoutUtils::CombineBreakType(uint8_t aOrigBreakType,
|
||
uint8_t aNewBreakType)
|
||
{
|
||
uint8_t breakType = aOrigBreakType;
|
||
switch(breakType) {
|
||
case NS_STYLE_CLEAR_LEFT:
|
||
if (NS_STYLE_CLEAR_RIGHT == aNewBreakType ||
|
||
NS_STYLE_CLEAR_BOTH == aNewBreakType) {
|
||
breakType = NS_STYLE_CLEAR_BOTH;
|
||
}
|
||
break;
|
||
case NS_STYLE_CLEAR_RIGHT:
|
||
if (NS_STYLE_CLEAR_LEFT == aNewBreakType ||
|
||
NS_STYLE_CLEAR_BOTH == aNewBreakType) {
|
||
breakType = NS_STYLE_CLEAR_BOTH;
|
||
}
|
||
break;
|
||
case NS_STYLE_CLEAR_NONE:
|
||
if (NS_STYLE_CLEAR_LEFT == aNewBreakType ||
|
||
NS_STYLE_CLEAR_RIGHT == aNewBreakType ||
|
||
NS_STYLE_CLEAR_BOTH == aNewBreakType) {
|
||
breakType = aNewBreakType;
|
||
}
|
||
}
|
||
return breakType;
|
||
}
|
||
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
#include <stdio.h>
|
||
|
||
static bool gDumpEventList = false;
|
||
int gPaintCount = 0;
|
||
#endif
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetFrameForPoint(nsIFrame* aFrame, nsPoint aPt, uint32_t aFlags)
|
||
{
|
||
PROFILER_LABEL("nsLayoutUtils", "GetFrameForPoint",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
nsresult rv;
|
||
nsAutoTArray<nsIFrame*,8> outFrames;
|
||
rv = GetFramesForArea(aFrame, nsRect(aPt, nsSize(1, 1)), outFrames, aFlags);
|
||
NS_ENSURE_SUCCESS(rv, nullptr);
|
||
return outFrames.Length() ? outFrames.ElementAt(0) : nullptr;
|
||
}
|
||
|
||
nsresult
|
||
nsLayoutUtils::GetFramesForArea(nsIFrame* aFrame, const nsRect& aRect,
|
||
nsTArray<nsIFrame*> &aOutFrames,
|
||
uint32_t aFlags)
|
||
{
|
||
PROFILER_LABEL("nsLayoutUtils", "GetFramesForArea",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::EVENT_DELIVERY,
|
||
false);
|
||
nsDisplayList list;
|
||
|
||
if (aFlags & IGNORE_PAINT_SUPPRESSION) {
|
||
builder.IgnorePaintSuppression();
|
||
}
|
||
|
||
if (aFlags & IGNORE_ROOT_SCROLL_FRAME) {
|
||
nsIFrame* rootScrollFrame =
|
||
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
||
if (rootScrollFrame) {
|
||
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
||
}
|
||
}
|
||
if (aFlags & IGNORE_CROSS_DOC) {
|
||
builder.SetDescendIntoSubdocuments(false);
|
||
}
|
||
|
||
builder.EnterPresShell(aFrame);
|
||
aFrame->BuildDisplayListForStackingContext(&builder, aRect, &list);
|
||
builder.LeavePresShell(aFrame);
|
||
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
if (gDumpEventList) {
|
||
fprintf_stderr(stderr, "Event handling --- (%d,%d):\n", aRect.x, aRect.y);
|
||
|
||
std::stringstream ss;
|
||
nsFrame::PrintDisplayList(&builder, list, ss);
|
||
print_stderr(ss);
|
||
}
|
||
#endif
|
||
|
||
nsDisplayItem::HitTestState hitTestState;
|
||
list.HitTest(&builder, aRect, &hitTestState, &aOutFrames);
|
||
list.DeleteAll();
|
||
return NS_OK;
|
||
}
|
||
|
||
// aScrollFrameAsScrollable must be non-nullptr and queryable to an nsIFrame
|
||
static FrameMetrics
|
||
CalculateFrameMetricsForDisplayPort(nsIScrollableFrame* aScrollFrame) {
|
||
nsIFrame* frame = do_QueryFrame(aScrollFrame);
|
||
MOZ_ASSERT(frame);
|
||
|
||
// Calculate the metrics necessary for calculating the displayport.
|
||
// This code has a lot in common with the code in ComputeFrameMetrics();
|
||
// we may want to refactor this at some point.
|
||
FrameMetrics metrics;
|
||
nsPresContext* presContext = frame->PresContext();
|
||
nsIPresShell* presShell = presContext->PresShell();
|
||
CSSToLayoutDeviceScale deviceScale(float(nsPresContext::AppUnitsPerCSSPixel())
|
||
/ presContext->AppUnitsPerDevPixel());
|
||
float resolution = 1.0f;
|
||
if (frame == presShell->GetRootScrollFrame()) {
|
||
// Only the root scrollable frame for a given presShell should pick up
|
||
// the presShell's resolution. All the other frames are 1.0.
|
||
resolution = presShell->GetResolution();
|
||
}
|
||
// Note: unlike in ComputeFrameMetrics(), we don't know the full cumulative
|
||
// resolution including FrameMetrics::mExtraResolution, because layout hasn't
|
||
// chosen a resolution to paint at yet. However, the display port calculation
|
||
// divides out mExtraResolution anyways, so we get the correct result by
|
||
// setting the mCumulativeResolution to everything except the extra resolution
|
||
// and leaving mExtraResolution at 1.
|
||
LayoutDeviceToLayerScale2D cumulativeResolution(
|
||
presShell->GetCumulativeResolution()
|
||
* nsLayoutUtils::GetTransformToAncestorScale(frame));
|
||
|
||
LayerToParentLayerScale layerToParentLayerScale(1.0f);
|
||
metrics.SetDevPixelsPerCSSPixel(deviceScale);
|
||
metrics.SetPresShellResolution(resolution);
|
||
metrics.SetCumulativeResolution(cumulativeResolution);
|
||
metrics.SetZoom(deviceScale * cumulativeResolution * layerToParentLayerScale);
|
||
|
||
// Only the size of the composition bounds is relevant to the
|
||
// displayport calculation, not its origin.
|
||
nsSize compositionSize = nsLayoutUtils::CalculateCompositionSizeForFrame(frame);
|
||
LayoutDeviceToParentLayerScale2D compBoundsScale;
|
||
if (frame == presShell->GetRootScrollFrame() && presContext->IsRootContentDocument()) {
|
||
if (presContext->GetParentPresContext()) {
|
||
float res = presContext->GetParentPresContext()->PresShell()->GetCumulativeResolution();
|
||
compBoundsScale = LayoutDeviceToParentLayerScale2D(
|
||
LayoutDeviceToParentLayerScale(res));
|
||
}
|
||
} else {
|
||
compBoundsScale = cumulativeResolution * layerToParentLayerScale;
|
||
}
|
||
metrics.SetCompositionBounds(
|
||
LayoutDeviceRect::FromAppUnits(nsRect(nsPoint(0, 0), compositionSize),
|
||
presContext->AppUnitsPerDevPixel())
|
||
* compBoundsScale);
|
||
|
||
metrics.SetRootCompositionSize(
|
||
nsLayoutUtils::CalculateRootCompositionSize(frame, false, metrics));
|
||
|
||
metrics.SetScrollOffset(CSSPoint::FromAppUnits(
|
||
aScrollFrame->GetScrollPosition()));
|
||
|
||
metrics.SetScrollableRect(CSSRect::FromAppUnits(
|
||
nsLayoutUtils::CalculateScrollableRectForFrame(aScrollFrame, nullptr)));
|
||
|
||
return metrics;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::CalculateAndSetDisplayPortMargins(nsIScrollableFrame* aScrollFrame,
|
||
RepaintMode aRepaintMode) {
|
||
nsIFrame* frame = do_QueryFrame(aScrollFrame);
|
||
MOZ_ASSERT(frame);
|
||
nsIContent* content = frame->GetContent();
|
||
MOZ_ASSERT(content);
|
||
|
||
FrameMetrics metrics = CalculateFrameMetricsForDisplayPort(aScrollFrame);
|
||
ScreenMargin displayportMargins = APZCTreeManager::CalculatePendingDisplayPort(
|
||
metrics, ParentLayerPoint(0.0f, 0.0f), 0.0);
|
||
nsIPresShell* presShell = frame->PresContext()->GetPresShell();
|
||
return nsLayoutUtils::SetDisplayPortMargins(
|
||
content, presShell, displayportMargins, 0, aRepaintMode);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::GetOrMaybeCreateDisplayPort(nsDisplayListBuilder& aBuilder,
|
||
nsIFrame* aScrollFrame,
|
||
nsRect aDisplayPortBase,
|
||
nsRect* aOutDisplayport) {
|
||
nsIContent* content = aScrollFrame->GetContent();
|
||
nsIScrollableFrame* scrollableFrame = do_QueryFrame(aScrollFrame);
|
||
if (!content || !scrollableFrame) {
|
||
return false;
|
||
}
|
||
|
||
// Set the base rect. Note that this will not influence 'haveDisplayPort',
|
||
// which is based on either the whole rect or margins being set, but it
|
||
// will affect what is returned in 'aOutDisplayPort' if margins are set.
|
||
SetDisplayPortBase(content, aDisplayPortBase);
|
||
|
||
bool haveDisplayPort = GetDisplayPort(content, aOutDisplayport);
|
||
|
||
// We perform an optimization where we ensure that at least one
|
||
// async-scrollable frame (i.e. one that WantsAsyncScroll()) has a displayport.
|
||
// If that's not the case yet, and we are async-scrollable, we will get a
|
||
// displayport.
|
||
// Note: we only do this in processes where we do subframe scrolling to
|
||
// begin with (i.e., not in the parent process on B2G).
|
||
if (aBuilder.IsPaintingToWindow() &&
|
||
nsLayoutUtils::AsyncPanZoomEnabled(aScrollFrame) &&
|
||
!aBuilder.HaveScrollableDisplayPort() &&
|
||
scrollableFrame->WantAsyncScroll()) {
|
||
|
||
// If we don't already have a displayport, calculate and set one.
|
||
if (!haveDisplayPort) {
|
||
CalculateAndSetDisplayPortMargins(scrollableFrame, nsLayoutUtils::RepaintMode::DoNotRepaint);
|
||
haveDisplayPort = GetDisplayPort(content, aOutDisplayport);
|
||
NS_ASSERTION(haveDisplayPort, "should have a displayport after having just set it");
|
||
}
|
||
|
||
// Record that the we now have a scrollable display port.
|
||
aBuilder.SetHaveScrollableDisplayPort();
|
||
}
|
||
|
||
return haveDisplayPort;
|
||
}
|
||
|
||
nsresult
|
||
nsLayoutUtils::PaintFrame(nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
||
const nsRegion& aDirtyRegion, nscolor aBackstop,
|
||
uint32_t aFlags)
|
||
{
|
||
PROFILER_LABEL("nsLayoutUtils", "PaintFrame",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
if (aFlags & PAINT_WIDGET_LAYERS) {
|
||
nsView* view = aFrame->GetView();
|
||
if (!(view && view->GetWidget() && GetDisplayRootFrame(aFrame) == aFrame)) {
|
||
aFlags &= ~PAINT_WIDGET_LAYERS;
|
||
NS_ASSERTION(aRenderingContext, "need a rendering context");
|
||
}
|
||
}
|
||
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
nsIPresShell* presShell = presContext->PresShell();
|
||
nsRootPresContext* rootPresContext = presContext->GetRootPresContext();
|
||
if (!rootPresContext) {
|
||
return NS_OK;
|
||
}
|
||
|
||
TimeStamp startBuildDisplayList = TimeStamp::Now();
|
||
nsDisplayListBuilder builder(aFrame, nsDisplayListBuilder::PAINTING,
|
||
!(aFlags & PAINT_HIDE_CARET));
|
||
if (aFlags & PAINT_IN_TRANSFORM) {
|
||
builder.SetInTransform(true);
|
||
}
|
||
if (aFlags & PAINT_SYNC_DECODE_IMAGES) {
|
||
builder.SetSyncDecodeImages(true);
|
||
}
|
||
if (aFlags & (PAINT_WIDGET_LAYERS | PAINT_TO_WINDOW)) {
|
||
builder.SetPaintingToWindow(true);
|
||
}
|
||
if (aFlags & PAINT_IGNORE_SUPPRESSION) {
|
||
builder.IgnorePaintSuppression();
|
||
}
|
||
|
||
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
|
||
bool usingDisplayPort = false;
|
||
nsRect displayport;
|
||
if (rootScrollFrame && !aFrame->GetParent() &&
|
||
(aFlags & (PAINT_WIDGET_LAYERS | PAINT_TO_WINDOW)) &&
|
||
gfxPrefs::LayoutUseContainersForRootFrames()) {
|
||
nsRect displayportBase(
|
||
nsPoint(0,0),
|
||
nsLayoutUtils::CalculateCompositionSizeForFrame(rootScrollFrame));
|
||
usingDisplayPort = nsLayoutUtils::GetOrMaybeCreateDisplayPort(
|
||
builder, rootScrollFrame, displayportBase, &displayport);
|
||
}
|
||
|
||
nsRegion visibleRegion;
|
||
if (aFlags & PAINT_WIDGET_LAYERS) {
|
||
// This layer tree will be reused, so we'll need to calculate it
|
||
// for the whole "visible" area of the window
|
||
//
|
||
// |ignoreViewportScrolling| and |usingDisplayPort| are persistent
|
||
// document-rendering state. We rely on PresShell to flush
|
||
// retained layers as needed when that persistent state changes.
|
||
if (!usingDisplayPort) {
|
||
visibleRegion = aFrame->GetVisualOverflowRectRelativeToSelf();
|
||
} else {
|
||
visibleRegion = displayport;
|
||
}
|
||
} else {
|
||
visibleRegion = aDirtyRegion;
|
||
}
|
||
|
||
// If we're going to display something different from what we'd normally
|
||
// paint in a window then we will flush out any retained layer trees before
|
||
// *and after* we draw.
|
||
bool willFlushRetainedLayers = (aFlags & PAINT_HIDE_CARET) != 0;
|
||
|
||
nsDisplayList list;
|
||
|
||
// If the root has embedded plugins, flag the builder so we know we'll need
|
||
// to update plugin geometry after painting.
|
||
if ((aFlags & PAINT_WIDGET_LAYERS) &&
|
||
!willFlushRetainedLayers &&
|
||
!(aFlags & PAINT_DOCUMENT_RELATIVE) &&
|
||
rootPresContext->NeedToComputePluginGeometryUpdates()) {
|
||
builder.SetWillComputePluginGeometry(true);
|
||
}
|
||
|
||
nsRect canvasArea(nsPoint(0, 0), aFrame->GetSize());
|
||
bool ignoreViewportScrolling =
|
||
aFrame->GetParent() ? false : presShell->IgnoringViewportScrolling();
|
||
if (ignoreViewportScrolling && rootScrollFrame) {
|
||
nsIScrollableFrame* rootScrollableFrame =
|
||
presShell->GetRootScrollFrameAsScrollable();
|
||
if (aFlags & PAINT_DOCUMENT_RELATIVE) {
|
||
// Make visibleRegion and aRenderingContext relative to the
|
||
// scrolled frame instead of the root frame.
|
||
nsPoint pos = rootScrollableFrame->GetScrollPosition();
|
||
visibleRegion.MoveBy(-pos);
|
||
if (aRenderingContext) {
|
||
gfxPoint devPixelOffset =
|
||
nsLayoutUtils::PointToGfxPoint(pos,
|
||
presContext->AppUnitsPerDevPixel());
|
||
aRenderingContext->ThebesContext()->SetMatrix(
|
||
aRenderingContext->ThebesContext()->CurrentMatrix().Translate(devPixelOffset));
|
||
}
|
||
}
|
||
builder.SetIgnoreScrollFrame(rootScrollFrame);
|
||
|
||
nsCanvasFrame* canvasFrame =
|
||
do_QueryFrame(rootScrollableFrame->GetScrolledFrame());
|
||
if (canvasFrame) {
|
||
// Use UnionRect here to ensure that areas where the scrollbars
|
||
// were are still filled with the background color.
|
||
canvasArea.UnionRect(canvasArea,
|
||
canvasFrame->CanvasArea() + builder.ToReferenceFrame(canvasFrame));
|
||
}
|
||
}
|
||
|
||
builder.EnterPresShell(aFrame);
|
||
nsRect dirtyRect = visibleRegion.GetBounds();
|
||
{
|
||
// If a scrollable container layer is created in nsDisplayList::PaintForFrame,
|
||
// it will be the scroll parent for display items that are built in the
|
||
// BuildDisplayListForStackingContext call below. We need to set the scroll
|
||
// parent on the display list builder while we build those items, so that they
|
||
// can pick up their scroll parent's id.
|
||
ViewID id = FrameMetrics::NULL_SCROLL_ID;
|
||
if (ignoreViewportScrolling && presContext->IsRootContentDocument()) {
|
||
if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) {
|
||
if (nsIContent* content = rootScrollFrame->GetContent()) {
|
||
id = nsLayoutUtils::FindOrCreateIDFor(content);
|
||
}
|
||
}
|
||
}
|
||
#if !defined(MOZ_WIDGET_ANDROID) || defined(MOZ_ANDROID_APZ)
|
||
else if (presShell->GetDocument() && presShell->GetDocument()->IsRootDisplayDocument()
|
||
&& !presShell->GetRootScrollFrame()) {
|
||
// In cases where the root document is a XUL document, we want to take
|
||
// the ViewID from the root element, as that will be the ViewID of the
|
||
// root APZC in the tree. Skip doing this in cases where we know
|
||
// nsGfxScrollFrame::BuilDisplayList will do it instead.
|
||
if (dom::Element* element = presShell->GetDocument()->GetDocumentElement()) {
|
||
id = nsLayoutUtils::FindOrCreateIDFor(element);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(&builder, id);
|
||
|
||
PROFILER_LABEL("nsLayoutUtils", "PaintFrame::BuildDisplayList",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
aFrame->BuildDisplayListForStackingContext(&builder, dirtyRect, &list);
|
||
}
|
||
const bool paintAllContinuations = aFlags & PAINT_ALL_CONTINUATIONS;
|
||
NS_ASSERTION(!paintAllContinuations || !aFrame->GetPrevContinuation(),
|
||
"If painting all continuations, the frame must be "
|
||
"first-continuation");
|
||
|
||
nsIAtom* frameType = aFrame->GetType();
|
||
|
||
if (paintAllContinuations) {
|
||
nsIFrame* currentFrame = aFrame;
|
||
while ((currentFrame = currentFrame->GetNextContinuation()) != nullptr) {
|
||
PROFILER_LABEL("nsLayoutUtils", "PaintFrame::ContinuationsBuildDisplayList",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
nsRect frameDirty = dirtyRect - builder.ToReferenceFrame(currentFrame);
|
||
currentFrame->BuildDisplayListForStackingContext(&builder,
|
||
frameDirty, &list);
|
||
}
|
||
}
|
||
|
||
// For the viewport frame in print preview/page layout we want to paint
|
||
// the grey background behind the page, not the canvas color.
|
||
if (frameType == nsGkAtoms::viewportFrame &&
|
||
nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
|
||
nsRect bounds = nsRect(builder.ToReferenceFrame(aFrame),
|
||
aFrame->GetSize());
|
||
nsDisplayListBuilder::AutoBuildingDisplayList
|
||
buildingDisplayList(&builder, aFrame, bounds, false);
|
||
presShell->AddPrintPreviewBackgroundItem(builder, list, aFrame, bounds);
|
||
} else if (frameType != nsGkAtoms::pageFrame) {
|
||
// For printing, this function is first called on an nsPageFrame, which
|
||
// creates a display list with a PageContent item. The PageContent item's
|
||
// paint function calls this function on the nsPageFrame's child which is
|
||
// an nsPageContentFrame. We only want to add the canvas background color
|
||
// item once, for the nsPageContentFrame.
|
||
|
||
// Add the canvas background color to the bottom of the list. This
|
||
// happens after we've built the list so that AddCanvasBackgroundColorItem
|
||
// can monkey with the contents if necessary.
|
||
canvasArea.IntersectRect(canvasArea, visibleRegion.GetBounds());
|
||
nsDisplayListBuilder::AutoBuildingDisplayList
|
||
buildingDisplayList(&builder, aFrame, canvasArea, false);
|
||
presShell->AddCanvasBackgroundColorItem(
|
||
builder, list, aFrame, canvasArea, aBackstop);
|
||
|
||
// If the passed in backstop color makes us draw something different from
|
||
// normal, we need to flush layers.
|
||
if ((aFlags & PAINT_WIDGET_LAYERS) && !willFlushRetainedLayers) {
|
||
nsView* view = aFrame->GetView();
|
||
if (view) {
|
||
nscolor backstop = presShell->ComputeBackstopColor(view);
|
||
// The PresShell's canvas background color doesn't get updated until
|
||
// EnterPresShell, so this check has to be done after that.
|
||
nscolor canvasColor = presShell->GetCanvasBackground();
|
||
if (NS_ComposeColors(aBackstop, canvasColor) !=
|
||
NS_ComposeColors(backstop, canvasColor)) {
|
||
willFlushRetainedLayers = true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
builder.LeavePresShell(aFrame);
|
||
Telemetry::AccumulateTimeDelta(Telemetry::PAINT_BUILD_DISPLAYLIST_TIME,
|
||
startBuildDisplayList);
|
||
|
||
if (builder.GetHadToIgnorePaintSuppression()) {
|
||
willFlushRetainedLayers = true;
|
||
}
|
||
|
||
|
||
bool profilerNeedsDisplayList = profiler_feature_active("displaylistdump");
|
||
bool consoleNeedsDisplayList = gfxUtils::DumpDisplayList() || gfxUtils::sDumpPainting;
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
FILE* savedDumpFile = gfxUtils::sDumpPaintFile;
|
||
#endif
|
||
|
||
UniquePtr<std::stringstream> ss;
|
||
if (consoleNeedsDisplayList || profilerNeedsDisplayList) {
|
||
ss = MakeUnique<std::stringstream>();
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
nsCString string("dump-");
|
||
string.AppendInt(gPaintCount);
|
||
string.AppendLiteral(".html");
|
||
gfxUtils::sDumpPaintFile = fopen(string.BeginReading(), "w");
|
||
} else {
|
||
gfxUtils::sDumpPaintFile = stderr;
|
||
}
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
*ss << "<html><head><script>var array = {}; function ViewImage(index) { window.location = array[index]; }</script></head><body>";
|
||
}
|
||
#endif
|
||
*ss << nsPrintfCString("Painting --- before optimization (dirty %d,%d,%d,%d):\n",
|
||
dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height).get();
|
||
nsFrame::PrintDisplayList(&builder, list, *ss, gfxUtils::sDumpPaintingToFile);
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
*ss << "<script>";
|
||
} else {
|
||
// Flush stream now to avoid reordering dump output relative to
|
||
// messages dumped by PaintRoot below.
|
||
if (profilerNeedsDisplayList && !consoleNeedsDisplayList) {
|
||
profiler_log(ss->str().c_str());
|
||
} else {
|
||
// Send to the console which will send to the profiler if required.
|
||
fprint_stderr(gfxUtils::sDumpPaintFile, *ss);
|
||
}
|
||
ss = MakeUnique<std::stringstream>();
|
||
}
|
||
}
|
||
|
||
uint32_t flags = nsDisplayList::PAINT_DEFAULT;
|
||
if (aFlags & PAINT_WIDGET_LAYERS) {
|
||
flags |= nsDisplayList::PAINT_USE_WIDGET_LAYERS;
|
||
if (willFlushRetainedLayers) {
|
||
// The caller wanted to paint from retained layers, but set up
|
||
// the paint in such a way that we can't use them. We're going
|
||
// to display something different from what we'd normally paint
|
||
// in a window, so make sure we flush out any retained layer
|
||
// trees before *and after* we draw. Callers should be fixed to
|
||
// not do this.
|
||
NS_WARNING("Flushing retained layers!");
|
||
flags |= nsDisplayList::PAINT_FLUSH_LAYERS;
|
||
} else if (!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
||
nsIWidget *widget = aFrame->GetNearestWidget();
|
||
if (widget) {
|
||
// If we're finished building display list items for painting of the outermost
|
||
// pres shell, notify the widget about any toolbars we've encountered.
|
||
widget->UpdateThemeGeometries(builder.GetThemeGeometries());
|
||
}
|
||
}
|
||
}
|
||
if (aFlags & PAINT_EXISTING_TRANSACTION) {
|
||
flags |= nsDisplayList::PAINT_EXISTING_TRANSACTION;
|
||
}
|
||
if (aFlags & PAINT_NO_COMPOSITE) {
|
||
flags |= nsDisplayList::PAINT_NO_COMPOSITE;
|
||
}
|
||
if (aFlags & PAINT_COMPRESSED) {
|
||
flags |= nsDisplayList::PAINT_COMPRESSED;
|
||
}
|
||
|
||
TimeStamp paintStart = TimeStamp::Now();
|
||
nsRefPtr<LayerManager> layerManager =
|
||
list.PaintRoot(&builder, aRenderingContext, flags);
|
||
Telemetry::AccumulateTimeDelta(Telemetry::PAINT_RASTERIZE_TIME,
|
||
paintStart);
|
||
|
||
if (consoleNeedsDisplayList || profilerNeedsDisplayList) {
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
*ss << "</script>";
|
||
}
|
||
#endif
|
||
*ss << "Painting --- after optimization:\n";
|
||
nsFrame::PrintDisplayList(&builder, list, *ss, gfxUtils::sDumpPaintingToFile);
|
||
|
||
*ss << "Painting --- layer tree:\n";
|
||
if (layerManager) {
|
||
FrameLayerBuilder::DumpRetainedLayerTree(layerManager, *ss,
|
||
gfxUtils::sDumpPaintingToFile);
|
||
}
|
||
|
||
if (profilerNeedsDisplayList && !consoleNeedsDisplayList) {
|
||
profiler_log(ss->str().c_str());
|
||
} else {
|
||
// Send to the console which will send to the profiler if required.
|
||
fprint_stderr(gfxUtils::sDumpPaintFile, *ss);
|
||
}
|
||
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
*ss << "</body></html>";
|
||
}
|
||
if (gfxUtils::sDumpPaintingToFile) {
|
||
fclose(gfxUtils::sDumpPaintFile);
|
||
}
|
||
gfxUtils::sDumpPaintFile = savedDumpFile;
|
||
gPaintCount++;
|
||
#endif
|
||
}
|
||
|
||
#ifdef MOZ_DUMP_PAINTING
|
||
if (gfxPrefs::DumpClientLayers()) {
|
||
std::stringstream ss;
|
||
FrameLayerBuilder::DumpRetainedLayerTree(layerManager, ss, false);
|
||
print_stderr(ss);
|
||
}
|
||
#endif
|
||
|
||
// Update the widget's opaque region information. This sets
|
||
// glass boundaries on Windows. Also set up the window dragging region
|
||
// and plugin clip regions and bounds.
|
||
if ((aFlags & PAINT_WIDGET_LAYERS) &&
|
||
!willFlushRetainedLayers &&
|
||
!(aFlags & PAINT_DOCUMENT_RELATIVE)) {
|
||
nsIWidget *widget = aFrame->GetNearestWidget();
|
||
if (widget) {
|
||
nsRegion opaqueRegion;
|
||
opaqueRegion.And(builder.GetWindowExcludeGlassRegion(), builder.GetWindowOpaqueRegion());
|
||
widget->UpdateOpaqueRegion(
|
||
opaqueRegion.ToNearestPixels(presContext->AppUnitsPerDevPixel()));
|
||
|
||
const nsIntRegion& draggingRegion = builder.GetWindowDraggingRegion();
|
||
widget->UpdateWindowDraggingRegion(draggingRegion);
|
||
}
|
||
}
|
||
|
||
if (builder.WillComputePluginGeometry()) {
|
||
// For single process compute and apply plugin geometry updates to plugin
|
||
// windows, then request composition. For content processes skip eveything
|
||
// except requesting composition. Geometry updates were calculated and
|
||
// shipped to the chrome process in nsDisplayList when the layer
|
||
// transaction completed.
|
||
if (XRE_GetProcessType() == GeckoProcessType_Default) {
|
||
rootPresContext->ComputePluginGeometryUpdates(aFrame, &builder, &list);
|
||
// We're not going to get a WillPaintWindow event here if we didn't do
|
||
// widget invalidation, so just apply the plugin geometry update here
|
||
// instead. We could instead have the compositor send back an equivalent
|
||
// to WillPaintWindow, but it should be close enough to now not to matter.
|
||
if (layerManager && !layerManager->NeedsWidgetInvalidation()) {
|
||
rootPresContext->ApplyPluginGeometryUpdates();
|
||
}
|
||
}
|
||
|
||
// We told the compositor thread not to composite when it received the
|
||
// transaction because we wanted to update plugins first. Schedule the
|
||
// composite now.
|
||
if (layerManager) {
|
||
layerManager->Composite();
|
||
}
|
||
}
|
||
|
||
|
||
// Flush the list so we don't trigger the IsEmpty-on-destruction assertion
|
||
list.DeleteAll();
|
||
return NS_OK;
|
||
}
|
||
|
||
/**
|
||
* Uses a binary search for find where the cursor falls in the line of text
|
||
* It also keeps track of the part of the string that has already been measured
|
||
* so it doesn't have to keep measuring the same text over and over
|
||
*
|
||
* @param "aBaseWidth" contains the width in twips of the portion
|
||
* of the text that has already been measured, and aBaseInx contains
|
||
* the index of the text that has already been measured.
|
||
*
|
||
* @param aTextWidth returns the (in twips) the length of the text that falls
|
||
* before the cursor aIndex contains the index of the text where the cursor falls
|
||
*/
|
||
bool
|
||
nsLayoutUtils::BinarySearchForPosition(nsRenderingContext* aRendContext,
|
||
nsFontMetrics& aFontMetrics,
|
||
const char16_t* aText,
|
||
int32_t aBaseWidth,
|
||
int32_t aBaseInx,
|
||
int32_t aStartInx,
|
||
int32_t aEndInx,
|
||
int32_t aCursorPos,
|
||
int32_t& aIndex,
|
||
int32_t& aTextWidth)
|
||
{
|
||
int32_t range = aEndInx - aStartInx;
|
||
if ((range == 1) || (range == 2 && NS_IS_HIGH_SURROGATE(aText[aStartInx]))) {
|
||
aIndex = aStartInx + aBaseInx;
|
||
aTextWidth = nsLayoutUtils::AppUnitWidthOfString(aText, aIndex,
|
||
aFontMetrics,
|
||
*aRendContext);
|
||
return true;
|
||
}
|
||
|
||
int32_t inx = aStartInx + (range / 2);
|
||
|
||
// Make sure we don't leave a dangling low surrogate
|
||
if (NS_IS_HIGH_SURROGATE(aText[inx-1]))
|
||
inx++;
|
||
|
||
int32_t textWidth = nsLayoutUtils::AppUnitWidthOfString(aText, inx,
|
||
aFontMetrics,
|
||
*aRendContext);
|
||
|
||
int32_t fullWidth = aBaseWidth + textWidth;
|
||
if (fullWidth == aCursorPos) {
|
||
aTextWidth = textWidth;
|
||
aIndex = inx;
|
||
return true;
|
||
} else if (aCursorPos < fullWidth) {
|
||
aTextWidth = aBaseWidth;
|
||
if (BinarySearchForPosition(aRendContext, aFontMetrics, aText, aBaseWidth,
|
||
aBaseInx, aStartInx, inx, aCursorPos, aIndex,
|
||
aTextWidth)) {
|
||
return true;
|
||
}
|
||
} else {
|
||
aTextWidth = fullWidth;
|
||
if (BinarySearchForPosition(aRendContext, aFontMetrics, aText, aBaseWidth,
|
||
aBaseInx, inx, aEndInx, aCursorPos, aIndex,
|
||
aTextWidth)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
static void
|
||
AddBoxesForFrame(nsIFrame* aFrame,
|
||
nsLayoutUtils::BoxCallback* aCallback)
|
||
{
|
||
nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo();
|
||
|
||
if (pseudoType == nsCSSAnonBoxes::tableOuter) {
|
||
AddBoxesForFrame(aFrame->GetFirstPrincipalChild(), aCallback);
|
||
nsIFrame* kid = aFrame->GetFirstChild(nsIFrame::kCaptionList);
|
||
if (kid) {
|
||
AddBoxesForFrame(kid, aCallback);
|
||
}
|
||
} else if (pseudoType == nsCSSAnonBoxes::mozAnonymousBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozAnonymousPositionedBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozMathMLAnonymousBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozXULAnonymousBlock) {
|
||
for (nsIFrame* kid = aFrame->GetFirstPrincipalChild(); kid; kid = kid->GetNextSibling()) {
|
||
AddBoxesForFrame(kid, aCallback);
|
||
}
|
||
} else {
|
||
aCallback->AddBox(aFrame);
|
||
}
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::GetAllInFlowBoxes(nsIFrame* aFrame, BoxCallback* aCallback)
|
||
{
|
||
while (aFrame) {
|
||
AddBoxesForFrame(aFrame, aCallback);
|
||
aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame);
|
||
}
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetFirstNonAnonymousFrame(nsIFrame* aFrame)
|
||
{
|
||
while (aFrame) {
|
||
nsIAtom* pseudoType = aFrame->StyleContext()->GetPseudo();
|
||
|
||
if (pseudoType == nsCSSAnonBoxes::tableOuter) {
|
||
nsIFrame* f = GetFirstNonAnonymousFrame(aFrame->GetFirstPrincipalChild());
|
||
if (f) {
|
||
return f;
|
||
}
|
||
nsIFrame* kid = aFrame->GetFirstChild(nsIFrame::kCaptionList);
|
||
if (kid) {
|
||
f = GetFirstNonAnonymousFrame(kid);
|
||
if (f) {
|
||
return f;
|
||
}
|
||
}
|
||
} else if (pseudoType == nsCSSAnonBoxes::mozAnonymousBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozAnonymousPositionedBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozMathMLAnonymousBlock ||
|
||
pseudoType == nsCSSAnonBoxes::mozXULAnonymousBlock) {
|
||
for (nsIFrame* kid = aFrame->GetFirstPrincipalChild(); kid; kid = kid->GetNextSibling()) {
|
||
nsIFrame* f = GetFirstNonAnonymousFrame(kid);
|
||
if (f) {
|
||
return f;
|
||
}
|
||
}
|
||
} else {
|
||
return aFrame;
|
||
}
|
||
|
||
aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame);
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
struct BoxToRect : public nsLayoutUtils::BoxCallback {
|
||
nsIFrame* mRelativeTo;
|
||
nsLayoutUtils::RectCallback* mCallback;
|
||
uint32_t mFlags;
|
||
|
||
BoxToRect(nsIFrame* aRelativeTo, nsLayoutUtils::RectCallback* aCallback,
|
||
uint32_t aFlags)
|
||
: mRelativeTo(aRelativeTo), mCallback(aCallback), mFlags(aFlags) {}
|
||
|
||
virtual void AddBox(nsIFrame* aFrame) override {
|
||
nsRect r;
|
||
nsIFrame* outer = nsSVGUtils::GetOuterSVGFrameAndCoveredRegion(aFrame, &r);
|
||
if (!outer) {
|
||
outer = aFrame;
|
||
switch (mFlags & nsLayoutUtils::RECTS_WHICH_BOX_MASK) {
|
||
case nsLayoutUtils::RECTS_USE_CONTENT_BOX:
|
||
r = aFrame->GetContentRectRelativeToSelf();
|
||
break;
|
||
case nsLayoutUtils::RECTS_USE_PADDING_BOX:
|
||
r = aFrame->GetPaddingRectRelativeToSelf();
|
||
break;
|
||
case nsLayoutUtils::RECTS_USE_MARGIN_BOX:
|
||
r = aFrame->GetMarginRectRelativeToSelf();
|
||
break;
|
||
default: // Use the border box
|
||
r = aFrame->GetRectRelativeToSelf();
|
||
}
|
||
}
|
||
if (mFlags & nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS) {
|
||
r = nsLayoutUtils::TransformFrameRectToAncestor(outer, r, mRelativeTo);
|
||
} else {
|
||
r += outer->GetOffsetTo(mRelativeTo);
|
||
}
|
||
mCallback->AddRect(r);
|
||
}
|
||
};
|
||
|
||
void
|
||
nsLayoutUtils::GetAllInFlowRects(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
||
RectCallback* aCallback, uint32_t aFlags)
|
||
{
|
||
BoxToRect converter(aRelativeTo, aCallback, aFlags);
|
||
GetAllInFlowBoxes(aFrame, &converter);
|
||
}
|
||
|
||
nsLayoutUtils::RectAccumulator::RectAccumulator() : mSeenFirstRect(false) {}
|
||
|
||
void nsLayoutUtils::RectAccumulator::AddRect(const nsRect& aRect) {
|
||
mResultRect.UnionRect(mResultRect, aRect);
|
||
if (!mSeenFirstRect) {
|
||
mSeenFirstRect = true;
|
||
mFirstRect = aRect;
|
||
}
|
||
}
|
||
|
||
nsLayoutUtils::RectListBuilder::RectListBuilder(DOMRectList* aList)
|
||
: mRectList(aList)
|
||
{
|
||
}
|
||
|
||
void nsLayoutUtils::RectListBuilder::AddRect(const nsRect& aRect) {
|
||
nsRefPtr<DOMRect> rect = new DOMRect(mRectList);
|
||
|
||
rect->SetLayoutRect(aRect);
|
||
mRectList->Append(rect);
|
||
}
|
||
|
||
nsIFrame* nsLayoutUtils::GetContainingBlockForClientRect(nsIFrame* aFrame)
|
||
{
|
||
return aFrame->PresContext()->PresShell()->GetRootFrame();
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::GetAllInFlowRectsUnion(nsIFrame* aFrame, nsIFrame* aRelativeTo,
|
||
uint32_t aFlags) {
|
||
RectAccumulator accumulator;
|
||
GetAllInFlowRects(aFrame, aRelativeTo, &accumulator, aFlags);
|
||
return accumulator.mResultRect.IsEmpty() ? accumulator.mFirstRect
|
||
: accumulator.mResultRect;
|
||
}
|
||
|
||
nsRect
|
||
nsLayoutUtils::GetTextShadowRectsUnion(const nsRect& aTextAndDecorationsRect,
|
||
nsIFrame* aFrame,
|
||
uint32_t aFlags)
|
||
{
|
||
const nsStyleText* textStyle = aFrame->StyleText();
|
||
if (!textStyle->HasTextShadow())
|
||
return aTextAndDecorationsRect;
|
||
|
||
nsRect resultRect = aTextAndDecorationsRect;
|
||
int32_t A2D = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
for (uint32_t i = 0; i < textStyle->mTextShadow->Length(); ++i) {
|
||
nsCSSShadowItem* shadow = textStyle->mTextShadow->ShadowAt(i);
|
||
nsMargin blur = nsContextBoxBlur::GetBlurRadiusMargin(shadow->mRadius, A2D);
|
||
if ((aFlags & EXCLUDE_BLUR_SHADOWS) && blur != nsMargin(0, 0, 0, 0))
|
||
continue;
|
||
|
||
nsRect tmpRect(aTextAndDecorationsRect);
|
||
|
||
tmpRect.MoveBy(nsPoint(shadow->mXOffset, shadow->mYOffset));
|
||
tmpRect.Inflate(blur);
|
||
|
||
resultRect.UnionRect(resultRect, tmpRect);
|
||
}
|
||
return resultRect;
|
||
}
|
||
|
||
enum ObjectDimensionType { eWidth, eHeight };
|
||
static nscoord
|
||
ComputeMissingDimension(const nsSize& aDefaultObjectSize,
|
||
const nsSize& aIntrinsicRatio,
|
||
const Maybe<nscoord>& aSpecifiedWidth,
|
||
const Maybe<nscoord>& aSpecifiedHeight,
|
||
ObjectDimensionType aDimensionToCompute)
|
||
{
|
||
// The "default sizing algorithm" computes the missing dimension as follows:
|
||
// (source: http://dev.w3.org/csswg/css-images-3/#default-sizing )
|
||
|
||
// 1. "If the object has an intrinsic aspect ratio, the missing dimension of
|
||
// the concrete object size is calculated using the intrinsic aspect
|
||
// ratio and the present dimension."
|
||
if (aIntrinsicRatio.width > 0 && aIntrinsicRatio.height > 0) {
|
||
// Fill in the missing dimension using the intrinsic aspect ratio.
|
||
nscoord knownDimensionSize;
|
||
float ratio;
|
||
if (aDimensionToCompute == eWidth) {
|
||
knownDimensionSize = *aSpecifiedHeight;
|
||
ratio = aIntrinsicRatio.width / aIntrinsicRatio.height;
|
||
} else {
|
||
knownDimensionSize = *aSpecifiedWidth;
|
||
ratio = aIntrinsicRatio.height / aIntrinsicRatio.width;
|
||
}
|
||
return NSCoordSaturatingNonnegativeMultiply(knownDimensionSize, ratio);
|
||
}
|
||
|
||
// 2. "Otherwise, if the missing dimension is present in the object’s
|
||
// intrinsic dimensions, [...]"
|
||
// NOTE: *Skipping* this case, because we already know it's not true -- we're
|
||
// in this function because the missing dimension is *not* present in
|
||
// the object's intrinsic dimensions.
|
||
|
||
// 3. "Otherwise, the missing dimension of the concrete object size is taken
|
||
// from the default object size. "
|
||
return (aDimensionToCompute == eWidth) ?
|
||
aDefaultObjectSize.width : aDefaultObjectSize.height;
|
||
}
|
||
|
||
/*
|
||
* This computes & returns the concrete object size of replaced content, if
|
||
* that content were to be rendered with "object-fit: none". (Or, if the
|
||
* element has neither an intrinsic height nor width, this method returns an
|
||
* empty Maybe<> object.)
|
||
*
|
||
* As specced...
|
||
* http://dev.w3.org/csswg/css-images-3/#valdef-object-fit-none
|
||
* ..we use "the default sizing algorithm with no specified size,
|
||
* and a default object size equal to the replaced element's used width and
|
||
* height."
|
||
*
|
||
* The default sizing algorithm is described here:
|
||
* http://dev.w3.org/csswg/css-images-3/#default-sizing
|
||
* Quotes in the function-impl are taken from that ^ spec-text.
|
||
*
|
||
* Per its final bulleted section: since there's no specified size,
|
||
* we run the default sizing algorithm using the object's intrinsic size in
|
||
* place of the specified size. But if the object has neither an intrinsic
|
||
* height nor an intrinsic width, then we instead return without populating our
|
||
* outparam, and we let the caller figure out the size (using a contain
|
||
* constraint).
|
||
*/
|
||
static Maybe<nsSize>
|
||
MaybeComputeObjectFitNoneSize(const nsSize& aDefaultObjectSize,
|
||
const IntrinsicSize& aIntrinsicSize,
|
||
const nsSize& aIntrinsicRatio)
|
||
{
|
||
// "If the object has an intrinsic height or width, its size is resolved as
|
||
// if its intrinsic dimensions were given as the specified size."
|
||
//
|
||
// So, first we check if we have an intrinsic height and/or width:
|
||
Maybe<nscoord> specifiedWidth;
|
||
if (aIntrinsicSize.width.GetUnit() == eStyleUnit_Coord) {
|
||
specifiedWidth.emplace(aIntrinsicSize.width.GetCoordValue());
|
||
}
|
||
|
||
Maybe<nscoord> specifiedHeight;
|
||
if (aIntrinsicSize.height.GetUnit() == eStyleUnit_Coord) {
|
||
specifiedHeight.emplace(aIntrinsicSize.height.GetCoordValue());
|
||
}
|
||
|
||
Maybe<nsSize> noneSize; // (the value we'll return)
|
||
if (specifiedWidth || specifiedHeight) {
|
||
// We have at least one specified dimension; use whichever dimension is
|
||
// specified, and compute the other one using our intrinsic ratio, or (if
|
||
// no valid ratio) using the default object size.
|
||
noneSize.emplace();
|
||
|
||
noneSize->width = specifiedWidth ?
|
||
*specifiedWidth :
|
||
ComputeMissingDimension(aDefaultObjectSize, aIntrinsicRatio,
|
||
specifiedWidth, specifiedHeight,
|
||
eWidth);
|
||
|
||
noneSize->height = specifiedHeight ?
|
||
*specifiedHeight :
|
||
ComputeMissingDimension(aDefaultObjectSize, aIntrinsicRatio,
|
||
specifiedWidth, specifiedHeight,
|
||
eHeight);
|
||
}
|
||
// [else:] "Otherwise [if there's neither an intrinsic height nor width], its
|
||
// size is resolved as a contain constraint against the default object size."
|
||
// We'll let our caller do that, to share code & avoid redundant
|
||
// computations; so, we return w/out populating noneSize.
|
||
return noneSize;
|
||
}
|
||
|
||
// Computes the concrete object size to render into, as described at
|
||
// http://dev.w3.org/csswg/css-images-3/#concrete-size-resolution
|
||
static nsSize
|
||
ComputeConcreteObjectSize(const nsSize& aConstraintSize,
|
||
const IntrinsicSize& aIntrinsicSize,
|
||
const nsSize& aIntrinsicRatio,
|
||
uint8_t aObjectFit)
|
||
{
|
||
// Handle default behavior (filling the container) w/ fast early return.
|
||
// (Also: if there's no valid intrinsic ratio, then we have the "fill"
|
||
// behavior & just use the constraint size.)
|
||
if (MOZ_LIKELY(aObjectFit == NS_STYLE_OBJECT_FIT_FILL) ||
|
||
aIntrinsicRatio.width == 0 ||
|
||
aIntrinsicRatio.height == 0) {
|
||
return aConstraintSize;
|
||
}
|
||
|
||
// The type of constraint to compute (cover/contain), if needed:
|
||
Maybe<nsImageRenderer::FitType> fitType;
|
||
|
||
Maybe<nsSize> noneSize;
|
||
if (aObjectFit == NS_STYLE_OBJECT_FIT_NONE ||
|
||
aObjectFit == NS_STYLE_OBJECT_FIT_SCALE_DOWN) {
|
||
noneSize = MaybeComputeObjectFitNoneSize(aConstraintSize, aIntrinsicSize,
|
||
aIntrinsicRatio);
|
||
if (!noneSize || aObjectFit == NS_STYLE_OBJECT_FIT_SCALE_DOWN) {
|
||
// Need to compute a 'CONTAIN' constraint (either for the 'none' size
|
||
// itself, or for comparison w/ the 'none' size to resolve 'scale-down'.)
|
||
fitType.emplace(nsImageRenderer::CONTAIN);
|
||
}
|
||
} else if (aObjectFit == NS_STYLE_OBJECT_FIT_COVER) {
|
||
fitType.emplace(nsImageRenderer::COVER);
|
||
} else if (aObjectFit == NS_STYLE_OBJECT_FIT_CONTAIN) {
|
||
fitType.emplace(nsImageRenderer::CONTAIN);
|
||
}
|
||
|
||
Maybe<nsSize> constrainedSize;
|
||
if (fitType) {
|
||
constrainedSize.emplace(
|
||
nsImageRenderer::ComputeConstrainedSize(aConstraintSize,
|
||
aIntrinsicRatio,
|
||
*fitType));
|
||
}
|
||
|
||
// Now, we should have all the sizing information that we need.
|
||
switch (aObjectFit) {
|
||
// skipping NS_STYLE_OBJECT_FIT_FILL; we handled it w/ early-return.
|
||
case NS_STYLE_OBJECT_FIT_CONTAIN:
|
||
case NS_STYLE_OBJECT_FIT_COVER:
|
||
MOZ_ASSERT(constrainedSize);
|
||
return *constrainedSize;
|
||
|
||
case NS_STYLE_OBJECT_FIT_NONE:
|
||
if (noneSize) {
|
||
return *noneSize;
|
||
}
|
||
MOZ_ASSERT(constrainedSize);
|
||
return *constrainedSize;
|
||
|
||
case NS_STYLE_OBJECT_FIT_SCALE_DOWN:
|
||
MOZ_ASSERT(constrainedSize);
|
||
if (noneSize) {
|
||
constrainedSize->width =
|
||
std::min(constrainedSize->width, noneSize->width);
|
||
constrainedSize->height =
|
||
std::min(constrainedSize->height, noneSize->height);
|
||
}
|
||
return *constrainedSize;
|
||
|
||
default:
|
||
MOZ_ASSERT_UNREACHABLE("Unexpected enum value for 'object-fit'");
|
||
return aConstraintSize; // fall back to (default) 'fill' behavior
|
||
}
|
||
}
|
||
|
||
// (Helper for HasInitialObjectFitAndPosition, to check
|
||
// each "object-position" coord.)
|
||
typedef nsStyleBackground::Position::PositionCoord PositionCoord;
|
||
static bool
|
||
IsCoord50Pct(const PositionCoord& aCoord)
|
||
{
|
||
return (aCoord.mLength == 0 &&
|
||
aCoord.mHasPercent &&
|
||
aCoord.mPercent == 0.5f);
|
||
}
|
||
|
||
// Indicates whether the given nsStylePosition has the initial values
|
||
// for the "object-fit" and "object-position" properties.
|
||
static bool
|
||
HasInitialObjectFitAndPosition(const nsStylePosition* aStylePos)
|
||
{
|
||
const nsStyleBackground::Position& objectPos = aStylePos->mObjectPosition;
|
||
|
||
return aStylePos->mObjectFit == NS_STYLE_OBJECT_FIT_FILL &&
|
||
IsCoord50Pct(objectPos.mXPosition) &&
|
||
IsCoord50Pct(objectPos.mYPosition);
|
||
}
|
||
|
||
/* static */ nsRect
|
||
nsLayoutUtils::ComputeObjectDestRect(const nsRect& aConstraintRect,
|
||
const IntrinsicSize& aIntrinsicSize,
|
||
const nsSize& aIntrinsicRatio,
|
||
const nsStylePosition* aStylePos,
|
||
nsPoint* aAnchorPoint)
|
||
{
|
||
// Step 1: Figure out our "concrete object size"
|
||
// (the size of the region we'll actually draw our image's pixels into).
|
||
nsSize concreteObjectSize =
|
||
ComputeConcreteObjectSize(aConstraintRect.Size(), aIntrinsicSize,
|
||
aIntrinsicRatio, aStylePos->mObjectFit);
|
||
|
||
// Step 2: Figure out how to align that region in the element's content-box.
|
||
nsPoint imageTopLeftPt, imageAnchorPt;
|
||
nsImageRenderer::ComputeObjectAnchorPoint(aStylePos->mObjectPosition,
|
||
aConstraintRect.Size(),
|
||
concreteObjectSize,
|
||
&imageTopLeftPt, &imageAnchorPt);
|
||
// Right now, we're with respect to aConstraintRect's top-left point. We add
|
||
// that point here, to convert to the same broader coordinate space that
|
||
// aConstraintRect is in.
|
||
imageTopLeftPt += aConstraintRect.TopLeft();
|
||
imageAnchorPt += aConstraintRect.TopLeft();
|
||
|
||
if (aAnchorPoint) {
|
||
// Special-case: if our "object-fit" and "object-position" properties have
|
||
// their default values ("object-fit: fill; object-position:50% 50%"), then
|
||
// we'll override the calculated imageAnchorPt, and instead use the
|
||
// object's top-left corner.
|
||
//
|
||
// This special case is partly for backwards compatibility (since
|
||
// traditionally we've pixel-aligned the top-left corner of e.g. <img>
|
||
// elements), and partly because ComputeSnappedDrawingParameters produces
|
||
// less error if the anchor point is at the top-left corner. So, all other
|
||
// things being equal, we prefer that code path with less error.
|
||
if (HasInitialObjectFitAndPosition(aStylePos)) {
|
||
*aAnchorPoint = imageTopLeftPt;
|
||
} else {
|
||
*aAnchorPoint = imageAnchorPt;
|
||
}
|
||
}
|
||
return nsRect(imageTopLeftPt, concreteObjectSize);
|
||
}
|
||
|
||
nsresult
|
||
nsLayoutUtils::GetFontMetricsForFrame(const nsIFrame* aFrame,
|
||
nsFontMetrics** aFontMetrics,
|
||
float aInflation)
|
||
{
|
||
return nsLayoutUtils::GetFontMetricsForStyleContext(aFrame->StyleContext(),
|
||
aFontMetrics,
|
||
aInflation);
|
||
}
|
||
|
||
nsresult
|
||
nsLayoutUtils::GetFontMetricsForStyleContext(nsStyleContext* aStyleContext,
|
||
nsFontMetrics** aFontMetrics,
|
||
float aInflation)
|
||
{
|
||
// pass the user font set object into the device context to pass along to CreateFontGroup
|
||
nsPresContext* pc = aStyleContext->PresContext();
|
||
gfxUserFontSet* fs = pc->GetUserFontSet();
|
||
gfxTextPerfMetrics* tp = pc->GetTextPerfMetrics();
|
||
|
||
WritingMode wm(aStyleContext);
|
||
gfxFont::Orientation orientation =
|
||
wm.IsVertical() && !wm.IsSideways() ? gfxFont::eVertical
|
||
: gfxFont::eHorizontal;
|
||
|
||
const nsStyleFont* styleFont = aStyleContext->StyleFont();
|
||
|
||
// When aInflation is 1.0, avoid making a local copy of the nsFont.
|
||
// This also avoids running font.size through floats when it is large,
|
||
// which would be lossy. Fortunately, in such cases, aInflation is
|
||
// guaranteed to be 1.0f.
|
||
if (aInflation == 1.0f) {
|
||
return pc->DeviceContext()->GetMetricsFor(styleFont->mFont,
|
||
styleFont->mLanguage,
|
||
styleFont->mExplicitLanguage,
|
||
orientation, fs, tp,
|
||
*aFontMetrics);
|
||
}
|
||
|
||
nsFont font = styleFont->mFont;
|
||
font.size = NSToCoordRound(font.size * aInflation);
|
||
return pc->DeviceContext()->GetMetricsFor(font, styleFont->mLanguage,
|
||
styleFont->mExplicitLanguage,
|
||
orientation, fs, tp,
|
||
*aFontMetrics);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::FindChildContainingDescendant(nsIFrame* aParent, nsIFrame* aDescendantFrame)
|
||
{
|
||
nsIFrame* result = aDescendantFrame;
|
||
|
||
while (result) {
|
||
nsIFrame* parent = result->GetParent();
|
||
if (parent == aParent) {
|
||
break;
|
||
}
|
||
|
||
// The frame is not an immediate child of aParent so walk up another level
|
||
result = parent;
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
nsBlockFrame*
|
||
nsLayoutUtils::GetAsBlock(nsIFrame* aFrame)
|
||
{
|
||
nsBlockFrame* block = do_QueryFrame(aFrame);
|
||
return block;
|
||
}
|
||
|
||
nsBlockFrame*
|
||
nsLayoutUtils::FindNearestBlockAncestor(nsIFrame* aFrame)
|
||
{
|
||
nsIFrame* nextAncestor;
|
||
for (nextAncestor = aFrame->GetParent(); nextAncestor;
|
||
nextAncestor = nextAncestor->GetParent()) {
|
||
nsBlockFrame* block = GetAsBlock(nextAncestor);
|
||
if (block)
|
||
return block;
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetNonGeneratedAncestor(nsIFrame* aFrame)
|
||
{
|
||
if (!(aFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT))
|
||
return aFrame;
|
||
|
||
nsIFrame* f = aFrame;
|
||
do {
|
||
f = GetParentOrPlaceholderFor(f);
|
||
} while (f->GetStateBits() & NS_FRAME_GENERATED_CONTENT);
|
||
return f;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetParentOrPlaceholderFor(nsIFrame* aFrame)
|
||
{
|
||
if ((aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
||
&& !aFrame->GetPrevInFlow()) {
|
||
return aFrame->PresContext()->PresShell()->FrameManager()->
|
||
GetPlaceholderFrameFor(aFrame);
|
||
}
|
||
return aFrame->GetParent();
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetParentOrPlaceholderForCrossDoc(nsIFrame* aFrame)
|
||
{
|
||
nsIFrame* f = GetParentOrPlaceholderFor(aFrame);
|
||
if (f)
|
||
return f;
|
||
return GetCrossDocParentFrame(aFrame);
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::GetNextContinuationOrIBSplitSibling(nsIFrame *aFrame)
|
||
{
|
||
nsIFrame *result = aFrame->GetNextContinuation();
|
||
if (result)
|
||
return result;
|
||
|
||
if ((aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) != 0) {
|
||
// We only store the ib-split sibling annotation with the first
|
||
// frame in the continuation chain. Walk back to find that frame now.
|
||
aFrame = aFrame->FirstContinuation();
|
||
|
||
void* value = aFrame->Properties().Get(nsIFrame::IBSplitSibling());
|
||
return static_cast<nsIFrame*>(value);
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::FirstContinuationOrIBSplitSibling(nsIFrame *aFrame)
|
||
{
|
||
nsIFrame *result = aFrame->FirstContinuation();
|
||
if (result->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) {
|
||
while (true) {
|
||
nsIFrame *f = static_cast<nsIFrame*>
|
||
(result->Properties().Get(nsIFrame::IBSplitPrevSibling()));
|
||
if (!f)
|
||
break;
|
||
result = f;
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
nsIFrame*
|
||
nsLayoutUtils::LastContinuationOrIBSplitSibling(nsIFrame *aFrame)
|
||
{
|
||
nsIFrame *result = aFrame->FirstContinuation();
|
||
if (result->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) {
|
||
while (true) {
|
||
nsIFrame *f = static_cast<nsIFrame*>
|
||
(result->Properties().Get(nsIFrame::IBSplitSibling()));
|
||
if (!f)
|
||
break;
|
||
result = f;
|
||
}
|
||
}
|
||
|
||
result = result->LastContinuation();
|
||
|
||
return result;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsFirstContinuationOrIBSplitSibling(nsIFrame *aFrame)
|
||
{
|
||
if (aFrame->GetPrevContinuation()) {
|
||
return false;
|
||
}
|
||
if ((aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) &&
|
||
aFrame->Properties().Get(nsIFrame::IBSplitPrevSibling())) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsViewportScrollbarFrame(nsIFrame* aFrame)
|
||
{
|
||
if (!aFrame)
|
||
return false;
|
||
|
||
nsIFrame* rootScrollFrame =
|
||
aFrame->PresContext()->PresShell()->GetRootScrollFrame();
|
||
if (!rootScrollFrame)
|
||
return false;
|
||
|
||
nsIScrollableFrame* rootScrollableFrame = do_QueryFrame(rootScrollFrame);
|
||
NS_ASSERTION(rootScrollableFrame, "The root scorollable frame is null");
|
||
|
||
if (!IsProperAncestorFrame(rootScrollFrame, aFrame))
|
||
return false;
|
||
|
||
nsIFrame* rootScrolledFrame = rootScrollableFrame->GetScrolledFrame();
|
||
return !(rootScrolledFrame == aFrame ||
|
||
IsProperAncestorFrame(rootScrolledFrame, aFrame));
|
||
}
|
||
|
||
static nscoord AddPercents(nsLayoutUtils::IntrinsicISizeType aType,
|
||
nscoord aCurrent, float aPercent)
|
||
{
|
||
nscoord result = aCurrent;
|
||
if (aPercent > 0.0f && aType == nsLayoutUtils::PREF_ISIZE) {
|
||
// XXX Should we also consider percentages for min widths, up to a
|
||
// limit?
|
||
if (aPercent >= 1.0f)
|
||
result = nscoord_MAX;
|
||
else
|
||
result = NSToCoordRound(float(result) / (1.0f - aPercent));
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Use only for widths/heights (or their min/max), since it clamps
|
||
// negative calc() results to 0.
|
||
static bool GetAbsoluteCoord(const nsStyleCoord& aStyle, nscoord& aResult)
|
||
{
|
||
if (aStyle.IsCalcUnit()) {
|
||
if (aStyle.CalcHasPercent()) {
|
||
return false;
|
||
}
|
||
// If it has no percents, we can pass 0 for the percentage basis.
|
||
aResult = nsRuleNode::ComputeComputedCalc(aStyle, 0);
|
||
if (aResult < 0)
|
||
aResult = 0;
|
||
return true;
|
||
}
|
||
|
||
if (eStyleUnit_Coord != aStyle.GetUnit())
|
||
return false;
|
||
|
||
aResult = aStyle.GetCoordValue();
|
||
NS_ASSERTION(aResult >= 0, "negative widths not allowed");
|
||
return true;
|
||
}
|
||
|
||
// Only call on style coords for which GetAbsoluteCoord returned false.
|
||
static bool
|
||
GetPercentBSize(const nsStyleCoord& aStyle,
|
||
nsIFrame* aFrame,
|
||
nscoord& aResult)
|
||
{
|
||
if (eStyleUnit_Percent != aStyle.GetUnit() &&
|
||
!aStyle.IsCalcUnit())
|
||
return false;
|
||
|
||
MOZ_ASSERT(!aStyle.IsCalcUnit() || aStyle.CalcHasPercent(),
|
||
"GetAbsoluteCoord should have handled this");
|
||
|
||
nsIFrame *f = aFrame->GetContainingBlock();
|
||
if (!f) {
|
||
NS_NOTREACHED("top of frame tree not a containing block");
|
||
return false;
|
||
}
|
||
|
||
// During reflow, nsHTMLScrollFrame::ReflowScrolledFrame uses
|
||
// SetComputedHeight on the reflow state for its child to propagate its
|
||
// computed height to the scrolled content. So here we skip to the scroll
|
||
// frame that contains this scrolled content in order to get the same
|
||
// behavior as layout when computing percentage heights.
|
||
if (f->StyleContext()->GetPseudo() == nsCSSAnonBoxes::scrolledContent) {
|
||
f = f->GetParent();
|
||
}
|
||
|
||
WritingMode wm = f->GetWritingMode();
|
||
|
||
const nsStylePosition *pos = f->StylePosition();
|
||
const nsStyleCoord& bSizeCoord = pos->BSize(wm);
|
||
nscoord h;
|
||
if (!GetAbsoluteCoord(bSizeCoord, h) &&
|
||
!GetPercentBSize(bSizeCoord, f, h)) {
|
||
NS_ASSERTION(bSizeCoord.GetUnit() == eStyleUnit_Auto ||
|
||
bSizeCoord.HasPercent(),
|
||
"unknown block-size unit");
|
||
nsIAtom* fType = f->GetType();
|
||
if (fType != nsGkAtoms::viewportFrame && fType != nsGkAtoms::canvasFrame &&
|
||
fType != nsGkAtoms::pageContentFrame) {
|
||
// There's no basis for the percentage height, so it acts like auto.
|
||
// Should we consider a max-height < min-height pair a basis for
|
||
// percentage heights? The spec is somewhat unclear, and not doing
|
||
// so is simpler and avoids troubling discontinuities in behavior,
|
||
// so I'll choose not to. -LDB
|
||
return false;
|
||
}
|
||
|
||
NS_ASSERTION(bSizeCoord.GetUnit() == eStyleUnit_Auto,
|
||
"Unexpected block-size unit for viewport or canvas or page-content");
|
||
// For the viewport, canvas, and page-content kids, the percentage
|
||
// basis is just the parent block-size.
|
||
h = f->BSize(wm);
|
||
if (h == NS_UNCONSTRAINEDSIZE) {
|
||
// We don't have a percentage basis after all
|
||
return false;
|
||
}
|
||
}
|
||
|
||
const nsStyleCoord& maxBSizeCoord = pos->MaxBSize(wm);
|
||
|
||
nscoord maxh;
|
||
if (GetAbsoluteCoord(maxBSizeCoord, maxh) ||
|
||
GetPercentBSize(maxBSizeCoord, f, maxh)) {
|
||
if (maxh < h)
|
||
h = maxh;
|
||
} else {
|
||
NS_ASSERTION(maxBSizeCoord.GetUnit() == eStyleUnit_None ||
|
||
maxBSizeCoord.HasPercent(),
|
||
"unknown max block-size unit");
|
||
}
|
||
|
||
const nsStyleCoord& minBSizeCoord = pos->MinBSize(wm);
|
||
|
||
nscoord minh;
|
||
if (GetAbsoluteCoord(minBSizeCoord, minh) ||
|
||
GetPercentBSize(minBSizeCoord, f, minh)) {
|
||
if (minh > h)
|
||
h = minh;
|
||
} else {
|
||
NS_ASSERTION(minBSizeCoord.HasPercent() ||
|
||
minBSizeCoord.GetUnit() == eStyleUnit_Auto,
|
||
"unknown min block-size unit");
|
||
}
|
||
|
||
if (aStyle.IsCalcUnit()) {
|
||
aResult = std::max(nsRuleNode::ComputeComputedCalc(aStyle, h), 0);
|
||
return true;
|
||
}
|
||
|
||
aResult = NSToCoordRound(aStyle.GetPercentValue() * h);
|
||
return true;
|
||
}
|
||
|
||
// Handles only -moz-max-content and -moz-min-content, and
|
||
// -moz-fit-content for min-width and max-width, since the others
|
||
// (-moz-fit-content for width, and -moz-available) have no effect on
|
||
// intrinsic widths.
|
||
enum eWidthProperty { PROP_WIDTH, PROP_MAX_WIDTH, PROP_MIN_WIDTH };
|
||
static bool
|
||
GetIntrinsicCoord(const nsStyleCoord& aStyle,
|
||
nsRenderingContext* aRenderingContext,
|
||
nsIFrame* aFrame,
|
||
eWidthProperty aProperty,
|
||
nscoord& aResult)
|
||
{
|
||
NS_PRECONDITION(aProperty == PROP_WIDTH || aProperty == PROP_MAX_WIDTH ||
|
||
aProperty == PROP_MIN_WIDTH, "unexpected property");
|
||
if (aStyle.GetUnit() != eStyleUnit_Enumerated)
|
||
return false;
|
||
int32_t val = aStyle.GetIntValue();
|
||
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
||
val == NS_STYLE_WIDTH_MIN_CONTENT ||
|
||
val == NS_STYLE_WIDTH_FIT_CONTENT ||
|
||
val == NS_STYLE_WIDTH_AVAILABLE,
|
||
"unexpected enumerated value for width property");
|
||
if (val == NS_STYLE_WIDTH_AVAILABLE)
|
||
return false;
|
||
if (val == NS_STYLE_WIDTH_FIT_CONTENT) {
|
||
if (aProperty == PROP_WIDTH)
|
||
return false; // handle like 'width: auto'
|
||
if (aProperty == PROP_MAX_WIDTH)
|
||
// constrain large 'width' values down to -moz-max-content
|
||
val = NS_STYLE_WIDTH_MAX_CONTENT;
|
||
else
|
||
// constrain small 'width' or 'max-width' values up to -moz-min-content
|
||
val = NS_STYLE_WIDTH_MIN_CONTENT;
|
||
}
|
||
|
||
NS_ASSERTION(val == NS_STYLE_WIDTH_MAX_CONTENT ||
|
||
val == NS_STYLE_WIDTH_MIN_CONTENT,
|
||
"should have reduced everything remaining to one of these");
|
||
|
||
// If aFrame is a container for font size inflation, then shrink
|
||
// wrapping inside of it should not apply font size inflation.
|
||
AutoMaybeDisableFontInflation an(aFrame);
|
||
|
||
if (val == NS_STYLE_WIDTH_MAX_CONTENT)
|
||
aResult = aFrame->GetPrefISize(aRenderingContext);
|
||
else
|
||
aResult = aFrame->GetMinISize(aRenderingContext);
|
||
return true;
|
||
}
|
||
|
||
#undef DEBUG_INTRINSIC_WIDTH
|
||
|
||
#ifdef DEBUG_INTRINSIC_WIDTH
|
||
static int32_t gNoiseIndent = 0;
|
||
#endif
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::IntrinsicForContainer(nsRenderingContext *aRenderingContext,
|
||
nsIFrame *aFrame,
|
||
IntrinsicISizeType aType,
|
||
uint32_t aFlags)
|
||
{
|
||
NS_PRECONDITION(aFrame, "null frame");
|
||
NS_PRECONDITION(aFrame->GetParent(),
|
||
"IntrinsicForContainer called on frame not in tree");
|
||
NS_PRECONDITION(aType == MIN_ISIZE || aType == PREF_ISIZE, "bad type");
|
||
|
||
#ifdef DEBUG_INTRINSIC_WIDTH
|
||
nsFrame::IndentBy(stderr, gNoiseIndent);
|
||
static_cast<nsFrame*>(aFrame)->ListTag(stderr);
|
||
printf_stderr(" %s intrinsic inline-size for container:\n",
|
||
aType == MIN_ISIZE ? "min" : "pref");
|
||
#endif
|
||
|
||
// If aFrame is a container for font size inflation, then shrink
|
||
// wrapping inside of it should not apply font size inflation.
|
||
AutoMaybeDisableFontInflation an(aFrame);
|
||
|
||
nsIFrame::IntrinsicISizeOffsetData offsets =
|
||
aFrame->IntrinsicISizeOffsets(aRenderingContext);
|
||
|
||
// We want the size this frame will contribute to the parent's inline-size,
|
||
// so we work in the parent's writing mode; but if aFrame is orthogonal to
|
||
// its parent, we'll need to look at its BSize instead of min/pref-ISize.
|
||
WritingMode wm = aFrame->GetParent()->GetWritingMode();
|
||
WritingMode ourWM = aFrame->GetWritingMode();
|
||
bool isOrthogonal = ourWM.IsOrthogonalTo(wm);
|
||
bool isVertical = wm.IsVertical();
|
||
|
||
const nsStylePosition *stylePos = aFrame->StylePosition();
|
||
uint8_t boxSizing = stylePos->mBoxSizing;
|
||
|
||
const nsStyleCoord& styleISize = stylePos->ISize(wm);
|
||
const nsStyleCoord& styleMinISize = stylePos->MinISize(wm);
|
||
const nsStyleCoord& styleMaxISize = stylePos->MaxISize(wm);
|
||
|
||
// We build up two values starting with the content box, and then
|
||
// adding padding, border and margin. The result is normally
|
||
// |result|. Then, when we handle 'width', 'min-width', and
|
||
// 'max-width', we use the results we've been building in |min| as a
|
||
// minimum, overriding 'min-width'. This ensures two things:
|
||
// * that we don't let a value of 'box-sizing' specifying a width
|
||
// smaller than the padding/border inside the box-sizing box give
|
||
// a content width less than zero
|
||
// * that we prevent tables from becoming smaller than their
|
||
// intrinsic minimum width
|
||
nscoord result = 0, min = 0;
|
||
|
||
nscoord maxISize;
|
||
bool haveFixedMaxISize = GetAbsoluteCoord(styleMaxISize, maxISize);
|
||
nscoord minISize;
|
||
|
||
// Treat "min-width: auto" as 0.
|
||
bool haveFixedMinISize;
|
||
if (eStyleUnit_Auto == styleMinISize.GetUnit()) {
|
||
// NOTE: Technically, "auto" is supposed to behave like "min-content" on
|
||
// flex items. However, we don't need to worry about that here, because
|
||
// flex items' min-sizes are intentionally ignored until the flex
|
||
// container explicitly considers them during space distribution.
|
||
minISize = 0;
|
||
haveFixedMinISize = true;
|
||
} else {
|
||
haveFixedMinISize = GetAbsoluteCoord(styleMinISize, minISize);
|
||
}
|
||
|
||
// If we have a specified width (or a specified 'min-width' greater
|
||
// than the specified 'max-width', which works out to the same thing),
|
||
// don't even bother getting the frame's intrinsic width, because in
|
||
// this case GetAbsoluteCoord(styleISize, w) will always succeed, so
|
||
// we'll never need the intrinsic dimensions.
|
||
if (styleISize.GetUnit() == eStyleUnit_Enumerated &&
|
||
(styleISize.GetIntValue() == NS_STYLE_WIDTH_MAX_CONTENT ||
|
||
styleISize.GetIntValue() == NS_STYLE_WIDTH_MIN_CONTENT)) {
|
||
// -moz-fit-content and -moz-available enumerated widths compute intrinsic
|
||
// widths just like auto.
|
||
// For -moz-max-content and -moz-min-content, we handle them like
|
||
// specified widths, but ignore box-sizing.
|
||
boxSizing = NS_STYLE_BOX_SIZING_CONTENT;
|
||
} else if (!styleISize.ConvertsToLength() &&
|
||
!(haveFixedMinISize && haveFixedMaxISize && maxISize <= minISize)) {
|
||
#ifdef DEBUG_INTRINSIC_WIDTH
|
||
++gNoiseIndent;
|
||
#endif
|
||
if (isOrthogonal) {
|
||
// We need aFrame's block-dir size, which will become its inline-size
|
||
// contribution in the container.
|
||
// XXX Unfortunately, we probably don't know this yet, so this is wrong...
|
||
// but it's not clear what we should do. If aFrame's inline size hasn't
|
||
// been determined yet, we can't necessarily figure out its block size
|
||
// either. For now, authors who put orthogonal elements into things like
|
||
// buttons or table cells may have to explicitly provide sizes rather
|
||
// than expecting intrinsic sizing to work "perfectly" in underspecified
|
||
// cases.
|
||
result = aFrame->BSize();
|
||
} else {
|
||
result = aType == MIN_ISIZE
|
||
? aFrame->GetMinISize(aRenderingContext)
|
||
: aFrame->GetPrefISize(aRenderingContext);
|
||
}
|
||
#ifdef DEBUG_INTRINSIC_WIDTH
|
||
--gNoiseIndent;
|
||
nsFrame::IndentBy(stderr, gNoiseIndent);
|
||
static_cast<nsFrame*>(aFrame)->ListTag(stderr);
|
||
printf_stderr(" %s intrinsic inline-size from frame is %d.\n",
|
||
aType == MIN_ISIZE ? "min" : "pref", result);
|
||
#endif
|
||
|
||
// Handle elements with an intrinsic ratio (or size) and a specified
|
||
// height, min-height, or max-height.
|
||
// NOTE: We treat "min-height:auto" as "0" for the purpose of this code,
|
||
// since that's what it means in all cases except for on flex items -- and
|
||
// even there, we're supposed to ignore it (i.e. treat it as 0) until the
|
||
// flex container explicitly considers it.
|
||
const nsStyleCoord& styleBSize = stylePos->BSize(wm);
|
||
const nsStyleCoord& styleMinBSize = stylePos->MinBSize(wm);
|
||
const nsStyleCoord& styleMaxBSize = stylePos->MaxBSize(wm);
|
||
|
||
if (styleBSize.GetUnit() != eStyleUnit_Auto ||
|
||
!(styleMinBSize.GetUnit() == eStyleUnit_Auto ||
|
||
(styleMinBSize.GetUnit() == eStyleUnit_Coord &&
|
||
styleMinBSize.GetCoordValue() == 0)) ||
|
||
styleMaxBSize.GetUnit() != eStyleUnit_None) {
|
||
|
||
LogicalSize ratio(wm, aFrame->GetIntrinsicRatio());
|
||
|
||
if (ratio.BSize(wm) != 0) {
|
||
nscoord bSizeTakenByBoxSizing = 0;
|
||
switch (boxSizing) {
|
||
case NS_STYLE_BOX_SIZING_BORDER: {
|
||
const nsStyleBorder* styleBorder = aFrame->StyleBorder();
|
||
bSizeTakenByBoxSizing +=
|
||
wm.IsVertical() ? styleBorder->GetComputedBorder().LeftRight()
|
||
: styleBorder->GetComputedBorder().TopBottom();
|
||
// fall through
|
||
}
|
||
case NS_STYLE_BOX_SIZING_PADDING: {
|
||
if (!(aFlags & IGNORE_PADDING)) {
|
||
const nsStyleSides& stylePadding =
|
||
aFrame->StylePadding()->mPadding;
|
||
const nsStyleCoord& paddingStart = stylePadding.GetBStart(wm);
|
||
const nsStyleCoord& paddingEnd = stylePadding.GetBEnd(wm);
|
||
nscoord pad;
|
||
if (GetAbsoluteCoord(paddingStart, pad) ||
|
||
GetPercentBSize(paddingStart, aFrame, pad)) {
|
||
bSizeTakenByBoxSizing += pad;
|
||
}
|
||
if (GetAbsoluteCoord(paddingEnd, pad) ||
|
||
GetPercentBSize(paddingEnd, aFrame, pad)) {
|
||
bSizeTakenByBoxSizing += pad;
|
||
}
|
||
}
|
||
// fall through
|
||
}
|
||
case NS_STYLE_BOX_SIZING_CONTENT:
|
||
default:
|
||
break;
|
||
}
|
||
|
||
nscoord h;
|
||
if (GetAbsoluteCoord(styleBSize, h) ||
|
||
GetPercentBSize(styleBSize, aFrame, h)) {
|
||
h = std::max(0, h - bSizeTakenByBoxSizing);
|
||
result = NSCoordMulDiv(h, ratio.ISize(wm), ratio.BSize(wm));
|
||
}
|
||
|
||
if (GetAbsoluteCoord(styleMaxBSize, h) ||
|
||
GetPercentBSize(styleMaxBSize, aFrame, h)) {
|
||
h = std::max(0, h - bSizeTakenByBoxSizing);
|
||
nscoord maxISize = NSCoordMulDiv(h, ratio.ISize(wm), ratio.BSize(wm));
|
||
if (maxISize < result)
|
||
result = maxISize;
|
||
}
|
||
|
||
if (GetAbsoluteCoord(styleMinBSize, h) ||
|
||
GetPercentBSize(styleMinBSize, aFrame, h)) {
|
||
h = std::max(0, h - bSizeTakenByBoxSizing);
|
||
nscoord minISize = NSCoordMulDiv(h, ratio.ISize(wm), ratio.BSize(wm));
|
||
if (minISize > result)
|
||
result = minISize;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (aFrame->GetType() == nsGkAtoms::tableFrame) {
|
||
// Tables can't shrink smaller than their intrinsic minimum width,
|
||
// no matter what.
|
||
min = aFrame->GetMinISize(aRenderingContext);
|
||
}
|
||
|
||
// We also need to track what has been added on outside of the box
|
||
// (controlled by 'box-sizing') where 'width', 'min-width' and
|
||
// 'max-width' are applied. We have to account for these properties
|
||
// after getting all the offsets (margin, border, padding) because
|
||
// percentages do not operate linearly.
|
||
// Doing this is ok because although percentages aren't handled
|
||
// linearly, they are handled monotonically.
|
||
nscoord coordOutsideISize = 0;
|
||
float pctOutsideISize = 0;
|
||
float pctTotal = 0.0f;
|
||
|
||
if (!(aFlags & IGNORE_PADDING)) {
|
||
coordOutsideISize += offsets.hPadding;
|
||
pctOutsideISize += offsets.hPctPadding;
|
||
|
||
if (boxSizing == NS_STYLE_BOX_SIZING_PADDING) {
|
||
min += coordOutsideISize;
|
||
result = NSCoordSaturatingAdd(result, coordOutsideISize);
|
||
pctTotal += pctOutsideISize;
|
||
|
||
coordOutsideISize = 0;
|
||
pctOutsideISize = 0.0f;
|
||
}
|
||
}
|
||
|
||
coordOutsideISize += offsets.hBorder;
|
||
|
||
if (boxSizing == NS_STYLE_BOX_SIZING_BORDER) {
|
||
min += coordOutsideISize;
|
||
result = NSCoordSaturatingAdd(result, coordOutsideISize);
|
||
pctTotal += pctOutsideISize;
|
||
|
||
coordOutsideISize = 0;
|
||
pctOutsideISize = 0.0f;
|
||
}
|
||
|
||
coordOutsideISize += offsets.hMargin;
|
||
pctOutsideISize += offsets.hPctMargin;
|
||
|
||
min += coordOutsideISize;
|
||
result = NSCoordSaturatingAdd(result, coordOutsideISize);
|
||
pctTotal += pctOutsideISize;
|
||
|
||
nscoord w;
|
||
if (GetAbsoluteCoord(styleISize, w) ||
|
||
GetIntrinsicCoord(styleISize, aRenderingContext, aFrame,
|
||
PROP_WIDTH, w)) {
|
||
result = AddPercents(aType, w + coordOutsideISize, pctOutsideISize);
|
||
}
|
||
else if (aType == MIN_ISIZE &&
|
||
// The only cases of coord-percent-calc() units that
|
||
// GetAbsoluteCoord didn't handle are percent and calc()s
|
||
// containing percent.
|
||
styleISize.IsCoordPercentCalcUnit() &&
|
||
aFrame->IsFrameOfType(nsIFrame::eReplaced)) {
|
||
// A percentage width on replaced elements means they can shrink to 0.
|
||
result = 0; // let |min| handle padding/border/margin
|
||
}
|
||
else {
|
||
// NOTE: We could really do a lot better for percents and for some
|
||
// cases of calc() containing percent (certainly including any where
|
||
// the coefficient on the percent is positive and there are no max()
|
||
// expressions). However, doing better for percents wouldn't be
|
||
// backwards compatible.
|
||
result = AddPercents(aType, result, pctTotal);
|
||
}
|
||
|
||
if (haveFixedMaxISize ||
|
||
GetIntrinsicCoord(styleMaxISize, aRenderingContext, aFrame,
|
||
PROP_MAX_WIDTH, maxISize)) {
|
||
maxISize = AddPercents(aType, maxISize + coordOutsideISize, pctOutsideISize);
|
||
if (result > maxISize)
|
||
result = maxISize;
|
||
}
|
||
|
||
if (haveFixedMinISize ||
|
||
GetIntrinsicCoord(styleMinISize, aRenderingContext, aFrame,
|
||
PROP_MIN_WIDTH, minISize)) {
|
||
minISize = AddPercents(aType, minISize + coordOutsideISize, pctOutsideISize);
|
||
if (result < minISize)
|
||
result = minISize;
|
||
}
|
||
|
||
min = AddPercents(aType, min, pctTotal);
|
||
if (result < min)
|
||
result = min;
|
||
|
||
const nsStyleDisplay *disp = aFrame->StyleDisplay();
|
||
if (aFrame->IsThemed(disp)) {
|
||
LayoutDeviceIntSize size;
|
||
bool canOverride = true;
|
||
nsPresContext *presContext = aFrame->PresContext();
|
||
presContext->GetTheme()->
|
||
GetMinimumWidgetSize(presContext, aFrame, disp->mAppearance,
|
||
&size, &canOverride);
|
||
|
||
nscoord themeISize =
|
||
presContext->DevPixelsToAppUnits(isVertical ? size.height : size.width);
|
||
|
||
// GMWS() returns a border-box width
|
||
themeISize += offsets.hMargin;
|
||
themeISize = AddPercents(aType, themeISize, offsets.hPctMargin);
|
||
|
||
if (themeISize > result || !canOverride) {
|
||
result = themeISize;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG_INTRINSIC_WIDTH
|
||
nsFrame::IndentBy(stderr, gNoiseIndent);
|
||
static_cast<nsFrame*>(aFrame)->ListTag(stderr);
|
||
printf_stderr(" %s intrinsic inline-size for container is %d twips.\n",
|
||
aType == MIN_ISIZE ? "min" : "pref", result);
|
||
#endif
|
||
|
||
return result;
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::ComputeCBDependentValue(nscoord aPercentBasis,
|
||
const nsStyleCoord& aCoord)
|
||
{
|
||
NS_WARN_IF_FALSE(aPercentBasis != NS_UNCONSTRAINEDSIZE,
|
||
"have unconstrained width or height; this should only "
|
||
"result from very large sizes, not attempts at intrinsic "
|
||
"size calculation");
|
||
|
||
if (aCoord.IsCoordPercentCalcUnit()) {
|
||
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aPercentBasis);
|
||
}
|
||
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
||
aCoord.GetUnit() == eStyleUnit_Auto,
|
||
"unexpected width value");
|
||
return 0;
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::ComputeISizeValue(
|
||
nsRenderingContext* aRenderingContext,
|
||
nsIFrame* aFrame,
|
||
nscoord aContainingBlockISize,
|
||
nscoord aContentEdgeToBoxSizing,
|
||
nscoord aBoxSizingToMarginEdge,
|
||
const nsStyleCoord& aCoord)
|
||
{
|
||
NS_PRECONDITION(aFrame, "non-null frame expected");
|
||
NS_PRECONDITION(aRenderingContext, "non-null rendering context expected");
|
||
NS_WARN_IF_FALSE(aContainingBlockISize != NS_UNCONSTRAINEDSIZE,
|
||
"have unconstrained inline-size; this should only result from "
|
||
"very large sizes, not attempts at intrinsic inline-size "
|
||
"calculation");
|
||
NS_PRECONDITION(aContainingBlockISize >= 0,
|
||
"inline-size less than zero");
|
||
|
||
nscoord result;
|
||
if (aCoord.IsCoordPercentCalcUnit()) {
|
||
result = nsRuleNode::ComputeCoordPercentCalc(aCoord,
|
||
aContainingBlockISize);
|
||
// The result of a calc() expression might be less than 0; we
|
||
// should clamp at runtime (below). (Percentages and coords that
|
||
// are less than 0 have already been dropped by the parser.)
|
||
result -= aContentEdgeToBoxSizing;
|
||
} else {
|
||
MOZ_ASSERT(eStyleUnit_Enumerated == aCoord.GetUnit());
|
||
// If aFrame is a container for font size inflation, then shrink
|
||
// wrapping inside of it should not apply font size inflation.
|
||
AutoMaybeDisableFontInflation an(aFrame);
|
||
|
||
int32_t val = aCoord.GetIntValue();
|
||
switch (val) {
|
||
case NS_STYLE_WIDTH_MAX_CONTENT:
|
||
result = aFrame->GetPrefISize(aRenderingContext);
|
||
NS_ASSERTION(result >= 0, "inline-size less than zero");
|
||
break;
|
||
case NS_STYLE_WIDTH_MIN_CONTENT:
|
||
result = aFrame->GetMinISize(aRenderingContext);
|
||
NS_ASSERTION(result >= 0, "inline-size less than zero");
|
||
break;
|
||
case NS_STYLE_WIDTH_FIT_CONTENT:
|
||
{
|
||
nscoord pref = aFrame->GetPrefISize(aRenderingContext),
|
||
min = aFrame->GetMinISize(aRenderingContext),
|
||
fill = aContainingBlockISize -
|
||
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
||
result = std::max(min, std::min(pref, fill));
|
||
NS_ASSERTION(result >= 0, "inline-size less than zero");
|
||
}
|
||
break;
|
||
case NS_STYLE_WIDTH_AVAILABLE:
|
||
result = aContainingBlockISize -
|
||
(aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
|
||
}
|
||
}
|
||
|
||
return std::max(0, result);
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::ComputeBSizeDependentValue(
|
||
nscoord aContainingBlockBSize,
|
||
const nsStyleCoord& aCoord)
|
||
{
|
||
// XXXldb Some callers explicitly check aContainingBlockBSize
|
||
// against NS_AUTOHEIGHT *and* unit against eStyleUnit_Percent or
|
||
// calc()s containing percents before calling this function.
|
||
// However, it would be much more likely to catch problems without
|
||
// the unit conditions.
|
||
// XXXldb Many callers pass a non-'auto' containing block height when
|
||
// according to CSS2.1 they should be passing 'auto'.
|
||
NS_PRECONDITION(NS_AUTOHEIGHT != aContainingBlockBSize ||
|
||
!aCoord.HasPercent(),
|
||
"unexpected containing block block-size");
|
||
|
||
if (aCoord.IsCoordPercentCalcUnit()) {
|
||
return nsRuleNode::ComputeCoordPercentCalc(aCoord, aContainingBlockBSize);
|
||
}
|
||
|
||
NS_ASSERTION(aCoord.GetUnit() == eStyleUnit_None ||
|
||
aCoord.GetUnit() == eStyleUnit_Auto,
|
||
"unexpected block-size value");
|
||
return 0;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::MarkDescendantsDirty(nsIFrame *aSubtreeRoot)
|
||
{
|
||
nsAutoTArray<nsIFrame*, 4> subtrees;
|
||
subtrees.AppendElement(aSubtreeRoot);
|
||
|
||
// dirty descendants, iterating over subtrees that may include
|
||
// additional subtrees associated with placeholders
|
||
do {
|
||
nsIFrame *subtreeRoot = subtrees.ElementAt(subtrees.Length() - 1);
|
||
subtrees.RemoveElementAt(subtrees.Length() - 1);
|
||
|
||
// Mark all descendants dirty (using an nsTArray stack rather than
|
||
// recursion).
|
||
// Note that nsHTMLReflowState::InitResizeFlags has some similar
|
||
// code; see comments there for how and why it differs.
|
||
nsAutoTArray<nsIFrame*, 32> stack;
|
||
stack.AppendElement(subtreeRoot);
|
||
|
||
do {
|
||
nsIFrame *f = stack.ElementAt(stack.Length() - 1);
|
||
stack.RemoveElementAt(stack.Length() - 1);
|
||
|
||
f->MarkIntrinsicISizesDirty();
|
||
|
||
if (f->GetType() == nsGkAtoms::placeholderFrame) {
|
||
nsIFrame *oof = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
|
||
if (!nsLayoutUtils::IsProperAncestorFrame(subtreeRoot, oof)) {
|
||
// We have another distinct subtree we need to mark.
|
||
subtrees.AppendElement(oof);
|
||
}
|
||
}
|
||
|
||
nsIFrame::ChildListIterator lists(f);
|
||
for (; !lists.IsDone(); lists.Next()) {
|
||
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
||
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
||
nsIFrame* kid = childFrames.get();
|
||
stack.AppendElement(kid);
|
||
}
|
||
}
|
||
} while (stack.Length() != 0);
|
||
} while (subtrees.Length() != 0);
|
||
}
|
||
|
||
/* static */
|
||
LogicalSize
|
||
nsLayoutUtils::ComputeSizeWithIntrinsicDimensions(WritingMode aWM,
|
||
nsRenderingContext* aRenderingContext, nsIFrame* aFrame,
|
||
const IntrinsicSize& aIntrinsicSize,
|
||
nsSize aIntrinsicRatio,
|
||
const mozilla::LogicalSize& aCBSize,
|
||
const mozilla::LogicalSize& aMargin,
|
||
const mozilla::LogicalSize& aBorder,
|
||
const mozilla::LogicalSize& aPadding)
|
||
{
|
||
const nsStylePosition* stylePos = aFrame->StylePosition();
|
||
|
||
// If we're a flex item, we'll compute our size a bit differently.
|
||
bool isVertical = aWM.IsVertical();
|
||
const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
|
||
const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);
|
||
|
||
bool isFlexItem = aFrame->IsFlexItem();
|
||
bool isInlineFlexItem = false;
|
||
|
||
if (isFlexItem) {
|
||
// Flex items use their "flex-basis" property in place of their main-size
|
||
// property (e.g. "width") for sizing purposes, *unless* they have
|
||
// "flex-basis:auto", in which case they use their main-size property after
|
||
// all.
|
||
uint32_t flexDirection =
|
||
aFrame->GetParent()->StylePosition()->mFlexDirection;
|
||
isInlineFlexItem =
|
||
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW ||
|
||
flexDirection == NS_STYLE_FLEX_DIRECTION_ROW_REVERSE;
|
||
|
||
// NOTE: The logic here should match the similar chunk for determining
|
||
// inlineStyleCoord and blockStyleCoord in nsFrame::ComputeSize().
|
||
const nsStyleCoord* flexBasis = &(stylePos->mFlexBasis);
|
||
if (flexBasis->GetUnit() != eStyleUnit_Auto) {
|
||
if (isInlineFlexItem) {
|
||
inlineStyleCoord = flexBasis;
|
||
} else {
|
||
// One caveat for vertical flex items: We don't support enumerated
|
||
// values (e.g. "max-content") for height properties yet. So, if our
|
||
// computed flex-basis is an enumerated value, we'll just behave as if
|
||
// it were "auto", which means "use the main-size property after all"
|
||
// (which is "height", in this case).
|
||
// NOTE: Once we support intrinsic sizing keywords for "height",
|
||
// we should remove this check.
|
||
if (flexBasis->GetUnit() != eStyleUnit_Enumerated) {
|
||
blockStyleCoord = flexBasis;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// Handle intrinsic sizes and their interaction with
|
||
// {min-,max-,}{width,height} according to the rules in
|
||
// http://www.w3.org/TR/CSS21/visudet.html#min-max-widths
|
||
|
||
// Note: throughout the following section of the function, I avoid
|
||
// a * (b / c) because of its reduced accuracy relative to a * b / c
|
||
// or (a * b) / c (which are equivalent).
|
||
|
||
const bool isAutoISize = inlineStyleCoord->GetUnit() == eStyleUnit_Auto;
|
||
const bool isAutoBSize = IsAutoBSize(*blockStyleCoord, aCBSize.BSize(aWM));
|
||
|
||
LogicalSize boxSizingAdjust(aWM);
|
||
switch (stylePos->mBoxSizing) {
|
||
case NS_STYLE_BOX_SIZING_BORDER:
|
||
boxSizingAdjust += aBorder;
|
||
// fall through
|
||
case NS_STYLE_BOX_SIZING_PADDING:
|
||
boxSizingAdjust += aPadding;
|
||
}
|
||
nscoord boxSizingToMarginEdgeISize =
|
||
aMargin.ISize(aWM) + aBorder.ISize(aWM) + aPadding.ISize(aWM) -
|
||
boxSizingAdjust.ISize(aWM);
|
||
|
||
nscoord iSize, minISize, maxISize, bSize, minBSize, maxBSize;
|
||
|
||
if (!isAutoISize) {
|
||
iSize = nsLayoutUtils::ComputeISizeValue(aRenderingContext,
|
||
aFrame, aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
|
||
boxSizingToMarginEdgeISize, *inlineStyleCoord);
|
||
}
|
||
|
||
const nsStyleCoord& maxISizeCoord = stylePos->MaxISize(aWM);
|
||
|
||
if (maxISizeCoord.GetUnit() != eStyleUnit_None &&
|
||
!(isFlexItem && isInlineFlexItem)) {
|
||
maxISize = nsLayoutUtils::ComputeISizeValue(aRenderingContext,
|
||
aFrame, aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
|
||
boxSizingToMarginEdgeISize, maxISizeCoord);
|
||
} else {
|
||
maxISize = nscoord_MAX;
|
||
}
|
||
|
||
// NOTE: Flex items ignore their min & max sizing properties in their
|
||
// flex container's main-axis. (Those properties get applied later in
|
||
// the flexbox algorithm.)
|
||
|
||
const nsStyleCoord& minISizeCoord = stylePos->MinISize(aWM);
|
||
|
||
if (minISizeCoord.GetUnit() != eStyleUnit_Auto &&
|
||
!(isFlexItem && isInlineFlexItem)) {
|
||
minISize = nsLayoutUtils::ComputeISizeValue(aRenderingContext,
|
||
aFrame, aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
|
||
boxSizingToMarginEdgeISize, minISizeCoord);
|
||
} else {
|
||
// Treat "min-width: auto" as 0.
|
||
// NOTE: Technically, "auto" is supposed to behave like "min-content" on
|
||
// flex items. However, we don't need to worry about that here, because
|
||
// flex items' min-sizes are intentionally ignored until the flex
|
||
// container explicitly considers them during space distribution.
|
||
minISize = 0;
|
||
}
|
||
|
||
if (!isAutoBSize) {
|
||
bSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
|
||
boxSizingAdjust.BSize(aWM),
|
||
*blockStyleCoord);
|
||
}
|
||
|
||
const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(aWM);
|
||
|
||
if (!IsAutoBSize(maxBSizeCoord, aCBSize.BSize(aWM)) &&
|
||
!(isFlexItem && !isInlineFlexItem)) {
|
||
maxBSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
|
||
boxSizingAdjust.BSize(aWM), maxBSizeCoord);
|
||
} else {
|
||
maxBSize = nscoord_MAX;
|
||
}
|
||
|
||
const nsStyleCoord& minBSizeCoord = stylePos->MinBSize(aWM);
|
||
|
||
if (!IsAutoBSize(minBSizeCoord, aCBSize.BSize(aWM)) &&
|
||
!(isFlexItem && !isInlineFlexItem)) {
|
||
minBSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
|
||
boxSizingAdjust.BSize(aWM), minBSizeCoord);
|
||
} else {
|
||
minBSize = 0;
|
||
}
|
||
|
||
// Resolve percentage intrinsic iSize/bSize as necessary:
|
||
|
||
NS_ASSERTION(aCBSize.ISize(aWM) != NS_UNCONSTRAINEDSIZE,
|
||
"Our containing block must not have unconstrained inline-size!");
|
||
|
||
const nsStyleCoord& isizeCoord =
|
||
isVertical ? aIntrinsicSize.height : aIntrinsicSize.width;
|
||
const nsStyleCoord& bsizeCoord =
|
||
isVertical ? aIntrinsicSize.width : aIntrinsicSize.height;
|
||
|
||
bool hasIntrinsicISize, hasIntrinsicBSize;
|
||
nscoord intrinsicISize, intrinsicBSize;
|
||
|
||
if (isizeCoord.GetUnit() == eStyleUnit_Coord) {
|
||
hasIntrinsicISize = true;
|
||
intrinsicISize = isizeCoord.GetCoordValue();
|
||
if (intrinsicISize < 0)
|
||
intrinsicISize = 0;
|
||
} else {
|
||
NS_ASSERTION(isizeCoord.GetUnit() == eStyleUnit_None,
|
||
"unexpected unit");
|
||
hasIntrinsicISize = false;
|
||
intrinsicISize = 0;
|
||
}
|
||
|
||
if (bsizeCoord.GetUnit() == eStyleUnit_Coord) {
|
||
hasIntrinsicBSize = true;
|
||
intrinsicBSize = bsizeCoord.GetCoordValue();
|
||
if (intrinsicBSize < 0)
|
||
intrinsicBSize = 0;
|
||
} else {
|
||
NS_ASSERTION(bsizeCoord.GetUnit() == eStyleUnit_None,
|
||
"unexpected unit");
|
||
hasIntrinsicBSize = false;
|
||
intrinsicBSize = 0;
|
||
}
|
||
|
||
NS_ASSERTION(aIntrinsicRatio.width >= 0 && aIntrinsicRatio.height >= 0,
|
||
"Intrinsic ratio has a negative component!");
|
||
LogicalSize logicalRatio(aWM, aIntrinsicRatio);
|
||
|
||
// Now calculate the used values for iSize and bSize:
|
||
|
||
if (isAutoISize) {
|
||
if (isAutoBSize) {
|
||
|
||
// 'auto' iSize, 'auto' bSize
|
||
|
||
// Get tentative values - CSS 2.1 sections 10.3.2 and 10.6.2:
|
||
|
||
nscoord tentISize, tentBSize;
|
||
|
||
if (hasIntrinsicISize) {
|
||
tentISize = intrinsicISize;
|
||
} else if (hasIntrinsicBSize && logicalRatio.BSize(aWM) > 0) {
|
||
tentISize = NSCoordMulDiv(intrinsicBSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
|
||
} else if (logicalRatio.ISize(aWM) > 0) {
|
||
tentISize = aCBSize.ISize(aWM) - boxSizingToMarginEdgeISize; // XXX scrollbar?
|
||
if (tentISize < 0) tentISize = 0;
|
||
} else {
|
||
tentISize = nsPresContext::CSSPixelsToAppUnits(300);
|
||
}
|
||
|
||
if (hasIntrinsicBSize) {
|
||
tentBSize = intrinsicBSize;
|
||
} else if (logicalRatio.ISize(aWM) > 0) {
|
||
tentBSize = NSCoordMulDiv(tentISize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
|
||
} else {
|
||
tentBSize = nsPresContext::CSSPixelsToAppUnits(150);
|
||
}
|
||
|
||
if (aIntrinsicRatio != nsSize(0, 0)) {
|
||
nsSize autoSize =
|
||
ComputeAutoSizeWithIntrinsicDimensions(minISize, minBSize,
|
||
maxISize, maxBSize,
|
||
tentISize, tentBSize);
|
||
// The nsSize that ComputeAutoSizeWithIntrinsicDimensions returns will
|
||
// actually contain logical values if the parameters passed to it were
|
||
// logical coordinates, so we do NOT perform a physical-to-logical
|
||
// conversion here, but just assign the fields directly to our result.
|
||
iSize = autoSize.width;
|
||
bSize = autoSize.height;
|
||
} else {
|
||
// No intrinsic ratio, so just clamp the dimensions
|
||
// independently without calling
|
||
// ComputeAutoSizeWithIntrinsicDimensions, which deals with
|
||
// propagating these changes to the other dimension (and would
|
||
// be incorrect when there is no intrinsic ratio).
|
||
iSize = NS_CSS_MINMAX(tentISize, minISize, maxISize);
|
||
bSize = NS_CSS_MINMAX(tentBSize, minBSize, maxBSize);
|
||
}
|
||
} else {
|
||
|
||
// 'auto' iSize, non-'auto' bSize
|
||
bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
|
||
if (logicalRatio.BSize(aWM) > 0) {
|
||
iSize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
|
||
} else if (hasIntrinsicISize) {
|
||
iSize = intrinsicISize;
|
||
} else {
|
||
iSize = nsPresContext::CSSPixelsToAppUnits(300);
|
||
}
|
||
iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
|
||
|
||
}
|
||
} else {
|
||
if (isAutoBSize) {
|
||
|
||
// non-'auto' iSize, 'auto' bSize
|
||
iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
|
||
if (logicalRatio.ISize(aWM) > 0) {
|
||
bSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
|
||
} else if (hasIntrinsicBSize) {
|
||
bSize = intrinsicBSize;
|
||
} else {
|
||
bSize = nsPresContext::CSSPixelsToAppUnits(150);
|
||
}
|
||
bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
|
||
|
||
} else {
|
||
|
||
// non-'auto' iSize, non-'auto' bSize
|
||
iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
|
||
bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
|
||
|
||
}
|
||
}
|
||
|
||
return LogicalSize(aWM, iSize, bSize);
|
||
}
|
||
|
||
nsSize
|
||
nsLayoutUtils::ComputeAutoSizeWithIntrinsicDimensions(nscoord minWidth, nscoord minHeight,
|
||
nscoord maxWidth, nscoord maxHeight,
|
||
nscoord tentWidth, nscoord tentHeight)
|
||
{
|
||
// Now apply min/max-width/height - CSS 2.1 sections 10.4 and 10.7:
|
||
|
||
if (minWidth > maxWidth)
|
||
maxWidth = minWidth;
|
||
if (minHeight > maxHeight)
|
||
maxHeight = minHeight;
|
||
|
||
nscoord heightAtMaxWidth, heightAtMinWidth,
|
||
widthAtMaxHeight, widthAtMinHeight;
|
||
|
||
if (tentWidth > 0) {
|
||
heightAtMaxWidth = NSCoordMulDiv(maxWidth, tentHeight, tentWidth);
|
||
if (heightAtMaxWidth < minHeight)
|
||
heightAtMaxWidth = minHeight;
|
||
heightAtMinWidth = NSCoordMulDiv(minWidth, tentHeight, tentWidth);
|
||
if (heightAtMinWidth > maxHeight)
|
||
heightAtMinWidth = maxHeight;
|
||
} else {
|
||
heightAtMaxWidth = heightAtMinWidth = NS_CSS_MINMAX(tentHeight, minHeight, maxHeight);
|
||
}
|
||
|
||
if (tentHeight > 0) {
|
||
widthAtMaxHeight = NSCoordMulDiv(maxHeight, tentWidth, tentHeight);
|
||
if (widthAtMaxHeight < minWidth)
|
||
widthAtMaxHeight = minWidth;
|
||
widthAtMinHeight = NSCoordMulDiv(minHeight, tentWidth, tentHeight);
|
||
if (widthAtMinHeight > maxWidth)
|
||
widthAtMinHeight = maxWidth;
|
||
} else {
|
||
widthAtMaxHeight = widthAtMinHeight = NS_CSS_MINMAX(tentWidth, minWidth, maxWidth);
|
||
}
|
||
|
||
// The table at http://www.w3.org/TR/CSS21/visudet.html#min-max-widths :
|
||
|
||
nscoord width, height;
|
||
|
||
if (tentWidth > maxWidth) {
|
||
if (tentHeight > maxHeight) {
|
||
if (int64_t(maxWidth) * int64_t(tentHeight) <=
|
||
int64_t(maxHeight) * int64_t(tentWidth)) {
|
||
width = maxWidth;
|
||
height = heightAtMaxWidth;
|
||
} else {
|
||
width = widthAtMaxHeight;
|
||
height = maxHeight;
|
||
}
|
||
} else {
|
||
// This also covers "(w > max-width) and (h < min-height)" since in
|
||
// that case (max-width/w < 1), and with (h < min-height):
|
||
// max(max-width * h/w, min-height) == min-height
|
||
width = maxWidth;
|
||
height = heightAtMaxWidth;
|
||
}
|
||
} else if (tentWidth < minWidth) {
|
||
if (tentHeight < minHeight) {
|
||
if (int64_t(minWidth) * int64_t(tentHeight) <=
|
||
int64_t(minHeight) * int64_t(tentWidth)) {
|
||
width = widthAtMinHeight;
|
||
height = minHeight;
|
||
} else {
|
||
width = minWidth;
|
||
height = heightAtMinWidth;
|
||
}
|
||
} else {
|
||
// This also covers "(w < min-width) and (h > max-height)" since in
|
||
// that case (min-width/w > 1), and with (h > max-height):
|
||
// min(min-width * h/w, max-height) == max-height
|
||
width = minWidth;
|
||
height = heightAtMinWidth;
|
||
}
|
||
} else {
|
||
if (tentHeight > maxHeight) {
|
||
width = widthAtMaxHeight;
|
||
height = maxHeight;
|
||
} else if (tentHeight < minHeight) {
|
||
width = widthAtMinHeight;
|
||
height = minHeight;
|
||
} else {
|
||
width = tentWidth;
|
||
height = tentHeight;
|
||
}
|
||
}
|
||
|
||
return nsSize(width, height);
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::MinISizeFromInline(nsIFrame* aFrame,
|
||
nsRenderingContext* aRenderingContext)
|
||
{
|
||
NS_ASSERTION(!aFrame->IsContainerForFontSizeInflation(),
|
||
"should not be container for font size inflation");
|
||
|
||
nsIFrame::InlineMinISizeData data;
|
||
DISPLAY_MIN_WIDTH(aFrame, data.prevLines);
|
||
aFrame->AddInlineMinISize(aRenderingContext, &data);
|
||
data.ForceBreak(aRenderingContext);
|
||
return data.prevLines;
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::PrefISizeFromInline(nsIFrame* aFrame,
|
||
nsRenderingContext* aRenderingContext)
|
||
{
|
||
NS_ASSERTION(!aFrame->IsContainerForFontSizeInflation(),
|
||
"should not be container for font size inflation");
|
||
|
||
nsIFrame::InlinePrefISizeData data;
|
||
DISPLAY_PREF_WIDTH(aFrame, data.prevLines);
|
||
aFrame->AddInlinePrefISize(aRenderingContext, &data);
|
||
data.ForceBreak(aRenderingContext);
|
||
return data.prevLines;
|
||
}
|
||
|
||
static nscolor
|
||
DarkenColor(nscolor aColor)
|
||
{
|
||
uint16_t hue, sat, value;
|
||
uint8_t alpha;
|
||
|
||
// convert the RBG to HSV so we can get the lightness (which is the v)
|
||
NS_RGB2HSV(aColor, hue, sat, value, alpha);
|
||
|
||
// The goal here is to send white to black while letting colored
|
||
// stuff stay colored... So we adopt the following approach.
|
||
// Something with sat = 0 should end up with value = 0. Something
|
||
// with a high sat can end up with a high value and it's ok.... At
|
||
// the same time, we don't want to make things lighter. Do
|
||
// something simple, since it seems to work.
|
||
if (value > sat) {
|
||
value = sat;
|
||
// convert this color back into the RGB color space.
|
||
NS_HSV2RGB(aColor, hue, sat, value, alpha);
|
||
}
|
||
return aColor;
|
||
}
|
||
|
||
// Check whether we should darken text/decoration colors. We need to do this if
|
||
// background images and colors are being suppressed, because that means
|
||
// light text will not be visible against the (presumed light-colored) background.
|
||
static bool
|
||
ShouldDarkenColors(nsPresContext* aPresContext)
|
||
{
|
||
return !aPresContext->GetBackgroundColorDraw() &&
|
||
!aPresContext->GetBackgroundImageDraw();
|
||
}
|
||
|
||
nscolor
|
||
nsLayoutUtils::GetColor(nsIFrame* aFrame, nsCSSProperty aProperty)
|
||
{
|
||
nscolor color = aFrame->GetVisitedDependentColor(aProperty);
|
||
if (ShouldDarkenColors(aFrame->PresContext())) {
|
||
color = DarkenColor(color);
|
||
}
|
||
return color;
|
||
}
|
||
|
||
gfxFloat
|
||
nsLayoutUtils::GetSnappedBaselineY(nsIFrame* aFrame, gfxContext* aContext,
|
||
nscoord aY, nscoord aAscent)
|
||
{
|
||
gfxFloat appUnitsPerDevUnit = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
gfxFloat baseline = gfxFloat(aY) + aAscent;
|
||
gfxRect putativeRect(0, baseline/appUnitsPerDevUnit, 1, 1);
|
||
if (!aContext->UserToDevicePixelSnapped(putativeRect, true))
|
||
return baseline;
|
||
return aContext->DeviceToUser(putativeRect.TopLeft()).y * appUnitsPerDevUnit;
|
||
}
|
||
|
||
gfxFloat
|
||
nsLayoutUtils::GetSnappedBaselineX(nsIFrame* aFrame, gfxContext* aContext,
|
||
nscoord aX, nscoord aAscent)
|
||
{
|
||
gfxFloat appUnitsPerDevUnit = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
gfxFloat baseline = gfxFloat(aX) + aAscent;
|
||
gfxRect putativeRect(baseline / appUnitsPerDevUnit, 0, 1, 1);
|
||
if (!aContext->UserToDevicePixelSnapped(putativeRect, true)) {
|
||
return baseline;
|
||
}
|
||
return aContext->DeviceToUser(putativeRect.TopLeft()).x * appUnitsPerDevUnit;
|
||
}
|
||
|
||
// Hard limit substring lengths to 8000 characters ... this lets us statically
|
||
// size the cluster buffer array in FindSafeLength
|
||
#define MAX_GFX_TEXT_BUF_SIZE 8000
|
||
|
||
static int32_t FindSafeLength(const char16_t *aString, uint32_t aLength,
|
||
uint32_t aMaxChunkLength)
|
||
{
|
||
if (aLength <= aMaxChunkLength)
|
||
return aLength;
|
||
|
||
int32_t len = aMaxChunkLength;
|
||
|
||
// Ensure that we don't break inside a surrogate pair
|
||
while (len > 0 && NS_IS_LOW_SURROGATE(aString[len])) {
|
||
len--;
|
||
}
|
||
if (len == 0) {
|
||
// We don't want our caller to go into an infinite loop, so don't
|
||
// return zero. It's hard to imagine how we could actually get here
|
||
// unless there are languages that allow clusters of arbitrary size.
|
||
// If there are and someone feeds us a 500+ character cluster, too
|
||
// bad.
|
||
return aMaxChunkLength;
|
||
}
|
||
return len;
|
||
}
|
||
|
||
static int32_t GetMaxChunkLength(nsFontMetrics& aFontMetrics)
|
||
{
|
||
return std::min(aFontMetrics.GetMaxStringLength(), MAX_GFX_TEXT_BUF_SIZE);
|
||
}
|
||
|
||
nscoord
|
||
nsLayoutUtils::AppUnitWidthOfString(const char16_t *aString,
|
||
uint32_t aLength,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext& aContext)
|
||
{
|
||
uint32_t maxChunkLength = GetMaxChunkLength(aFontMetrics);
|
||
nscoord width = 0;
|
||
while (aLength > 0) {
|
||
int32_t len = FindSafeLength(aString, aLength, maxChunkLength);
|
||
width += aFontMetrics.GetWidth(aString, len, &aContext);
|
||
aLength -= len;
|
||
aString += len;
|
||
}
|
||
return width;
|
||
}
|
||
|
||
nscoord
|
||
nsLayoutUtils::AppUnitWidthOfStringBidi(const char16_t* aString,
|
||
uint32_t aLength,
|
||
const nsIFrame* aFrame,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext& aContext)
|
||
{
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
if (presContext->BidiEnabled()) {
|
||
nsBidiLevel level =
|
||
nsBidiPresUtils::BidiLevelFromStyle(aFrame->StyleContext());
|
||
return nsBidiPresUtils::MeasureTextWidth(aString, aLength, level,
|
||
presContext, aContext,
|
||
aFontMetrics);
|
||
}
|
||
aFontMetrics.SetTextRunRTL(false);
|
||
aFontMetrics.SetVertical(aFrame->GetWritingMode().IsVertical());
|
||
aFontMetrics.SetTextOrientation(aFrame->StyleVisibility()->mTextOrientation);
|
||
return nsLayoutUtils::AppUnitWidthOfString(aString, aLength, aFontMetrics,
|
||
aContext);
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::StringWidthIsGreaterThan(const nsString& aString,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext& aContext,
|
||
nscoord aWidth)
|
||
{
|
||
const char16_t *string = aString.get();
|
||
uint32_t length = aString.Length();
|
||
uint32_t maxChunkLength = GetMaxChunkLength(aFontMetrics);
|
||
nscoord width = 0;
|
||
while (length > 0) {
|
||
int32_t len = FindSafeLength(string, length, maxChunkLength);
|
||
width += aFontMetrics.GetWidth(string, len, &aContext);
|
||
if (width > aWidth) {
|
||
return true;
|
||
}
|
||
length -= len;
|
||
string += len;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
nsBoundingMetrics
|
||
nsLayoutUtils::AppUnitBoundsOfString(const char16_t* aString,
|
||
uint32_t aLength,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext& aContext)
|
||
{
|
||
uint32_t maxChunkLength = GetMaxChunkLength(aFontMetrics);
|
||
int32_t len = FindSafeLength(aString, aLength, maxChunkLength);
|
||
// Assign directly in the first iteration. This ensures that
|
||
// negative ascent/descent can be returned and the left bearing
|
||
// is properly initialized.
|
||
nsBoundingMetrics totalMetrics =
|
||
aFontMetrics.GetBoundingMetrics(aString, len, &aContext);
|
||
aLength -= len;
|
||
aString += len;
|
||
|
||
while (aLength > 0) {
|
||
len = FindSafeLength(aString, aLength, maxChunkLength);
|
||
nsBoundingMetrics metrics =
|
||
aFontMetrics.GetBoundingMetrics(aString, len, &aContext);
|
||
totalMetrics += metrics;
|
||
aLength -= len;
|
||
aString += len;
|
||
}
|
||
return totalMetrics;
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::DrawString(const nsIFrame* aFrame,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext* aContext,
|
||
const char16_t* aString,
|
||
int32_t aLength,
|
||
nsPoint aPoint,
|
||
nsStyleContext* aStyleContext)
|
||
{
|
||
nsresult rv = NS_ERROR_FAILURE;
|
||
|
||
// If caller didn't pass a style context, use the frame's.
|
||
if (!aStyleContext) {
|
||
aStyleContext = aFrame->StyleContext();
|
||
}
|
||
aFontMetrics.SetVertical(WritingMode(aStyleContext).IsVertical());
|
||
aFontMetrics.SetTextOrientation(
|
||
aStyleContext->StyleVisibility()->mTextOrientation);
|
||
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
if (presContext->BidiEnabled()) {
|
||
nsBidiLevel level =
|
||
nsBidiPresUtils::BidiLevelFromStyle(aStyleContext);
|
||
rv = nsBidiPresUtils::RenderText(aString, aLength, level,
|
||
presContext, *aContext, *aContext,
|
||
aFontMetrics,
|
||
aPoint.x, aPoint.y);
|
||
}
|
||
if (NS_FAILED(rv))
|
||
{
|
||
aFontMetrics.SetTextRunRTL(false);
|
||
DrawUniDirString(aString, aLength, aPoint, aFontMetrics, *aContext);
|
||
}
|
||
}
|
||
|
||
void
|
||
nsLayoutUtils::DrawUniDirString(const char16_t* aString,
|
||
uint32_t aLength,
|
||
nsPoint aPoint,
|
||
nsFontMetrics& aFontMetrics,
|
||
nsRenderingContext& aContext)
|
||
{
|
||
nscoord x = aPoint.x;
|
||
nscoord y = aPoint.y;
|
||
|
||
uint32_t maxChunkLength = GetMaxChunkLength(aFontMetrics);
|
||
if (aLength <= maxChunkLength) {
|
||
aFontMetrics.DrawString(aString, aLength, x, y, &aContext, &aContext);
|
||
return;
|
||
}
|
||
|
||
bool isRTL = aFontMetrics.GetTextRunRTL();
|
||
|
||
// If we're drawing right to left, we must start at the end.
|
||
if (isRTL) {
|
||
x += nsLayoutUtils::AppUnitWidthOfString(aString, aLength, aFontMetrics,
|
||
aContext);
|
||
}
|
||
|
||
while (aLength > 0) {
|
||
int32_t len = FindSafeLength(aString, aLength, maxChunkLength);
|
||
nscoord width = aFontMetrics.GetWidth(aString, len, &aContext);
|
||
if (isRTL) {
|
||
x -= width;
|
||
}
|
||
aFontMetrics.DrawString(aString, len, x, y, &aContext, &aContext);
|
||
if (!isRTL) {
|
||
x += width;
|
||
}
|
||
aLength -= len;
|
||
aString += len;
|
||
}
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::PaintTextShadow(const nsIFrame* aFrame,
|
||
nsRenderingContext* aContext,
|
||
const nsRect& aTextRect,
|
||
const nsRect& aDirtyRect,
|
||
const nscolor& aForegroundColor,
|
||
TextShadowCallback aCallback,
|
||
void* aCallbackData)
|
||
{
|
||
const nsStyleText* textStyle = aFrame->StyleText();
|
||
if (!textStyle->HasTextShadow())
|
||
return;
|
||
|
||
// Text shadow happens with the last value being painted at the back,
|
||
// ie. it is painted first.
|
||
gfxContext* aDestCtx = aContext->ThebesContext();
|
||
for (uint32_t i = textStyle->mTextShadow->Length(); i > 0; --i) {
|
||
nsCSSShadowItem* shadowDetails = textStyle->mTextShadow->ShadowAt(i - 1);
|
||
nsPoint shadowOffset(shadowDetails->mXOffset,
|
||
shadowDetails->mYOffset);
|
||
nscoord blurRadius = std::max(shadowDetails->mRadius, 0);
|
||
|
||
nsRect shadowRect(aTextRect);
|
||
shadowRect.MoveBy(shadowOffset);
|
||
|
||
nsPresContext* presCtx = aFrame->PresContext();
|
||
nsContextBoxBlur contextBoxBlur;
|
||
gfxContext* shadowContext = contextBoxBlur.Init(shadowRect, 0, blurRadius,
|
||
presCtx->AppUnitsPerDevPixel(),
|
||
aDestCtx, aDirtyRect, nullptr);
|
||
if (!shadowContext)
|
||
continue;
|
||
|
||
nscolor shadowColor;
|
||
if (shadowDetails->mHasColor)
|
||
shadowColor = shadowDetails->mColor;
|
||
else
|
||
shadowColor = aForegroundColor;
|
||
|
||
// Conjure an nsRenderingContext from a gfxContext for drawing the text
|
||
// to blur.
|
||
nsRenderingContext renderingContext(shadowContext);
|
||
|
||
aDestCtx->Save();
|
||
aDestCtx->NewPath();
|
||
aDestCtx->SetColor(gfxRGBA(shadowColor));
|
||
|
||
// The callback will draw whatever we want to blur as a shadow.
|
||
aCallback(&renderingContext, shadowOffset, shadowColor, aCallbackData);
|
||
|
||
contextBoxBlur.DoPaint();
|
||
aDestCtx->Restore();
|
||
}
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::GetCenteredFontBaseline(nsFontMetrics* aFontMetrics,
|
||
nscoord aLineHeight,
|
||
bool aIsInverted)
|
||
{
|
||
nscoord fontAscent = aIsInverted ? aFontMetrics->MaxDescent()
|
||
: aFontMetrics->MaxAscent();
|
||
nscoord fontHeight = aFontMetrics->MaxHeight();
|
||
|
||
nscoord leading = aLineHeight - fontHeight;
|
||
return fontAscent + leading/2;
|
||
}
|
||
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::GetFirstLineBaseline(WritingMode aWritingMode,
|
||
const nsIFrame* aFrame, nscoord* aResult)
|
||
{
|
||
LinePosition position;
|
||
if (!GetFirstLinePosition(aWritingMode, aFrame, &position))
|
||
return false;
|
||
*aResult = position.mBaseline;
|
||
return true;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::GetFirstLinePosition(WritingMode aWM,
|
||
const nsIFrame* aFrame,
|
||
LinePosition* aResult)
|
||
{
|
||
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
||
if (!block) {
|
||
// For the first-line baseline we also have to check for a table, and if
|
||
// so, use the baseline of its first row.
|
||
nsIAtom* fType = aFrame->GetType();
|
||
if (fType == nsGkAtoms::tableOuterFrame) {
|
||
aResult->mBStart = 0;
|
||
aResult->mBaseline = aFrame->GetLogicalBaseline(aWM);
|
||
// This is what we want for the list bullet caller; not sure if
|
||
// other future callers will want the same.
|
||
aResult->mBEnd = aFrame->BSize(aWM);
|
||
return true;
|
||
}
|
||
|
||
// For first-line baselines, we have to consider scroll frames.
|
||
if (fType == nsGkAtoms::scrollFrame) {
|
||
nsIScrollableFrame *sFrame = do_QueryFrame(const_cast<nsIFrame*>(aFrame));
|
||
if (!sFrame) {
|
||
NS_NOTREACHED("not scroll frame");
|
||
}
|
||
LinePosition kidPosition;
|
||
if (GetFirstLinePosition(aWM,
|
||
sFrame->GetScrolledFrame(), &kidPosition)) {
|
||
// Consider only the border and padding that contributes to the
|
||
// kid's position, not the scrolling, so we get the initial
|
||
// position.
|
||
*aResult = kidPosition +
|
||
aFrame->GetLogicalUsedBorderAndPadding(aWM).BStart(aWM);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
if (fType == nsGkAtoms::fieldSetFrame) {
|
||
LinePosition kidPosition;
|
||
nsIFrame* kid = aFrame->GetFirstPrincipalChild();
|
||
// kid might be a legend frame here, but that's ok.
|
||
if (GetFirstLinePosition(aWM, kid, &kidPosition)) {
|
||
*aResult = kidPosition +
|
||
kid->GetLogicalNormalPosition(aWM, aFrame->GetSize().width).B(aWM);
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
// No baseline.
|
||
return false;
|
||
}
|
||
|
||
for (nsBlockFrame::const_line_iterator line = block->begin_lines(),
|
||
line_end = block->end_lines();
|
||
line != line_end; ++line) {
|
||
if (line->IsBlock()) {
|
||
nsIFrame *kid = line->mFirstChild;
|
||
LinePosition kidPosition;
|
||
if (GetFirstLinePosition(aWM, kid, &kidPosition)) {
|
||
//XXX Not sure if this is the correct value to use for container
|
||
// width here. It will only be used in vertical-rl layout,
|
||
// which we don't have full support and testing for yet.
|
||
nscoord containerWidth = line->mContainerWidth;
|
||
*aResult = kidPosition +
|
||
kid->GetLogicalNormalPosition(aWM, containerWidth).B(aWM);
|
||
return true;
|
||
}
|
||
} else {
|
||
// XXX Is this the right test? We have some bogus empty lines
|
||
// floating around, but IsEmpty is perhaps too weak.
|
||
if (line->BSize() != 0 || !line->IsEmpty()) {
|
||
nscoord bStart = line->BStart();
|
||
aResult->mBStart = bStart;
|
||
aResult->mBaseline = bStart + line->GetLogicalAscent();
|
||
aResult->mBEnd = bStart + line->BSize();
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::GetLastLineBaseline(WritingMode aWM,
|
||
const nsIFrame* aFrame, nscoord* aResult)
|
||
{
|
||
const nsBlockFrame* block = nsLayoutUtils::GetAsBlock(const_cast<nsIFrame*>(aFrame));
|
||
if (!block)
|
||
// No baseline. (We intentionally don't descend into scroll frames.)
|
||
return false;
|
||
|
||
for (nsBlockFrame::const_reverse_line_iterator line = block->rbegin_lines(),
|
||
line_end = block->rend_lines();
|
||
line != line_end; ++line) {
|
||
if (line->IsBlock()) {
|
||
nsIFrame *kid = line->mFirstChild;
|
||
nscoord kidBaseline;
|
||
nscoord containerWidth = line->mContainerWidth;
|
||
if (GetLastLineBaseline(aWM, kid, &kidBaseline)) {
|
||
// Ignore relative positioning for baseline calculations
|
||
*aResult = kidBaseline +
|
||
kid->GetLogicalNormalPosition(aWM, containerWidth).B(aWM);
|
||
return true;
|
||
} else if (kid->GetType() == nsGkAtoms::scrollFrame) {
|
||
// Use the bottom of the scroll frame.
|
||
// XXX CSS2.1 really doesn't say what to do here.
|
||
*aResult = kid->GetLogicalNormalPosition(aWM, containerWidth).B(aWM) +
|
||
kid->BSize(aWM);
|
||
return true;
|
||
}
|
||
} else {
|
||
// XXX Is this the right test? We have some bogus empty lines
|
||
// floating around, but IsEmpty is perhaps too weak.
|
||
if (line->BSize() != 0 || !line->IsEmpty()) {
|
||
*aResult = line->BStart() + line->GetLogicalAscent();
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
static nscoord
|
||
CalculateBlockContentBEnd(WritingMode aWM, nsBlockFrame* aFrame)
|
||
{
|
||
NS_PRECONDITION(aFrame, "null ptr");
|
||
|
||
nscoord contentBEnd = 0;
|
||
|
||
for (nsBlockFrame::line_iterator line = aFrame->begin_lines(),
|
||
line_end = aFrame->end_lines();
|
||
line != line_end; ++line) {
|
||
if (line->IsBlock()) {
|
||
nsIFrame* child = line->mFirstChild;
|
||
nscoord containerWidth = line->mContainerWidth;
|
||
nscoord offset =
|
||
child->GetLogicalNormalPosition(aWM, containerWidth).B(aWM);
|
||
contentBEnd =
|
||
std::max(contentBEnd,
|
||
nsLayoutUtils::CalculateContentBEnd(aWM, child) + offset);
|
||
}
|
||
else {
|
||
contentBEnd = std::max(contentBEnd, line->BEnd());
|
||
}
|
||
}
|
||
return contentBEnd;
|
||
}
|
||
|
||
/* static */ nscoord
|
||
nsLayoutUtils::CalculateContentBEnd(WritingMode aWM, nsIFrame* aFrame)
|
||
{
|
||
NS_PRECONDITION(aFrame, "null ptr");
|
||
|
||
nscoord contentBEnd = aFrame->BSize(aWM);
|
||
|
||
// We want scrollable overflow rather than visual because this
|
||
// calculation is intended to affect layout.
|
||
LogicalSize overflowSize(aWM, aFrame->GetScrollableOverflowRect().Size());
|
||
if (overflowSize.BSize(aWM) > contentBEnd) {
|
||
nsIFrame::ChildListIDs skip(nsIFrame::kOverflowList |
|
||
nsIFrame::kExcessOverflowContainersList |
|
||
nsIFrame::kOverflowOutOfFlowList);
|
||
nsBlockFrame* blockFrame = GetAsBlock(aFrame);
|
||
if (blockFrame) {
|
||
contentBEnd =
|
||
std::max(contentBEnd, CalculateBlockContentBEnd(aWM, blockFrame));
|
||
skip |= nsIFrame::kPrincipalList;
|
||
}
|
||
nsIFrame::ChildListIterator lists(aFrame);
|
||
for (; !lists.IsDone(); lists.Next()) {
|
||
if (!skip.Contains(lists.CurrentID())) {
|
||
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
||
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
||
nsIFrame* child = childFrames.get();
|
||
nscoord offset =
|
||
child->GetLogicalNormalPosition(aWM,
|
||
aFrame->GetSize().width).B(aWM);
|
||
contentBEnd = std::max(contentBEnd,
|
||
CalculateContentBEnd(aWM, child) + offset);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
return contentBEnd;
|
||
}
|
||
|
||
/* static */ nsIFrame*
|
||
nsLayoutUtils::GetClosestLayer(nsIFrame* aFrame)
|
||
{
|
||
nsIFrame* layer;
|
||
for (layer = aFrame; layer; layer = layer->GetParent()) {
|
||
if (layer->IsAbsPosContaininingBlock() ||
|
||
(layer->GetParent() &&
|
||
layer->GetParent()->GetType() == nsGkAtoms::scrollFrame))
|
||
break;
|
||
}
|
||
if (layer)
|
||
return layer;
|
||
return aFrame->PresContext()->PresShell()->FrameManager()->GetRootFrame();
|
||
}
|
||
|
||
GraphicsFilter
|
||
nsLayoutUtils::GetGraphicsFilterForFrame(nsIFrame* aForFrame)
|
||
{
|
||
GraphicsFilter defaultFilter = GraphicsFilter::FILTER_GOOD;
|
||
nsStyleContext *sc;
|
||
if (nsCSSRendering::IsCanvasFrame(aForFrame)) {
|
||
nsCSSRendering::FindBackground(aForFrame, &sc);
|
||
} else {
|
||
sc = aForFrame->StyleContext();
|
||
}
|
||
|
||
switch (sc->StyleSVG()->mImageRendering) {
|
||
case NS_STYLE_IMAGE_RENDERING_OPTIMIZESPEED:
|
||
return GraphicsFilter::FILTER_FAST;
|
||
case NS_STYLE_IMAGE_RENDERING_OPTIMIZEQUALITY:
|
||
return GraphicsFilter::FILTER_BEST;
|
||
case NS_STYLE_IMAGE_RENDERING_CRISPEDGES:
|
||
return GraphicsFilter::FILTER_NEAREST;
|
||
default:
|
||
return defaultFilter;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Given an image being drawn into an appunit coordinate system, and
|
||
* a point in that coordinate system, map the point back into image
|
||
* pixel space.
|
||
* @param aSize the size of the image, in pixels
|
||
* @param aDest the rectangle that the image is being mapped into
|
||
* @param aPt a point in the same coordinate system as the rectangle
|
||
*/
|
||
static gfxPoint
|
||
MapToFloatImagePixels(const gfxSize& aSize,
|
||
const gfxRect& aDest, const gfxPoint& aPt)
|
||
{
|
||
return gfxPoint(((aPt.x - aDest.X())*aSize.width)/aDest.Width(),
|
||
((aPt.y - aDest.Y())*aSize.height)/aDest.Height());
|
||
}
|
||
|
||
/**
|
||
* Given an image being drawn into an pixel-based coordinate system, and
|
||
* a point in image space, map the point into the pixel-based coordinate
|
||
* system.
|
||
* @param aSize the size of the image, in pixels
|
||
* @param aDest the rectangle that the image is being mapped into
|
||
* @param aPt a point in image space
|
||
*/
|
||
static gfxPoint
|
||
MapToFloatUserPixels(const gfxSize& aSize,
|
||
const gfxRect& aDest, const gfxPoint& aPt)
|
||
{
|
||
return gfxPoint(aPt.x*aDest.Width()/aSize.width + aDest.X(),
|
||
aPt.y*aDest.Height()/aSize.height + aDest.Y());
|
||
}
|
||
|
||
/* static */ gfxRect
|
||
nsLayoutUtils::RectToGfxRect(const nsRect& aRect, int32_t aAppUnitsPerDevPixel)
|
||
{
|
||
return gfxRect(gfxFloat(aRect.x) / aAppUnitsPerDevPixel,
|
||
gfxFloat(aRect.y) / aAppUnitsPerDevPixel,
|
||
gfxFloat(aRect.width) / aAppUnitsPerDevPixel,
|
||
gfxFloat(aRect.height) / aAppUnitsPerDevPixel);
|
||
}
|
||
|
||
struct SnappedImageDrawingParameters {
|
||
// A transform from image space to device space.
|
||
gfxMatrix imageSpaceToDeviceSpace;
|
||
// The size at which the image should be drawn (which may not be its
|
||
// intrinsic size due to, for example, HQ scaling).
|
||
nsIntSize size;
|
||
// The region in tiled image space which will be drawn, with an associated
|
||
// region to which sampling should be restricted.
|
||
ImageRegion region;
|
||
// The default viewport size for SVG images, which we use unless a different
|
||
// one has been explicitly specified. This is the same as |size| except that
|
||
// it does not take into account any transformation on the gfxContext we're
|
||
// drawing to - for example, CSS transforms are not taken into account.
|
||
CSSIntSize svgViewportSize;
|
||
// Whether there's anything to draw at all.
|
||
bool shouldDraw;
|
||
|
||
SnappedImageDrawingParameters()
|
||
: region(ImageRegion::Empty())
|
||
, shouldDraw(false)
|
||
{}
|
||
|
||
SnappedImageDrawingParameters(const gfxMatrix& aImageSpaceToDeviceSpace,
|
||
const nsIntSize& aSize,
|
||
const ImageRegion& aRegion,
|
||
const CSSIntSize& aSVGViewportSize)
|
||
: imageSpaceToDeviceSpace(aImageSpaceToDeviceSpace)
|
||
, size(aSize)
|
||
, region(aRegion)
|
||
, svgViewportSize(aSVGViewportSize)
|
||
, shouldDraw(true)
|
||
{}
|
||
};
|
||
|
||
/**
|
||
* Given two axis-aligned rectangles, returns the transformation that maps the
|
||
* first onto the second.
|
||
*
|
||
* @param aFrom The rect to be transformed.
|
||
* @param aTo The rect that aFrom should be mapped onto by the transformation.
|
||
*/
|
||
static gfxMatrix
|
||
TransformBetweenRects(const gfxRect& aFrom, const gfxRect& aTo)
|
||
{
|
||
gfxSize scale(aTo.width / aFrom.width,
|
||
aTo.height / aFrom.height);
|
||
gfxPoint translation(aTo.x - aFrom.x * scale.width,
|
||
aTo.y - aFrom.y * scale.height);
|
||
return gfxMatrix(scale.width, 0, 0, scale.height,
|
||
translation.x, translation.y);
|
||
}
|
||
|
||
static nsRect
|
||
TileNearRect(const nsRect& aAnyTile, const nsRect& aTargetRect)
|
||
{
|
||
nsPoint distance = aTargetRect.TopLeft() - aAnyTile.TopLeft();
|
||
return aAnyTile + nsPoint(distance.x / aAnyTile.width * aAnyTile.width,
|
||
distance.y / aAnyTile.height * aAnyTile.height);
|
||
}
|
||
|
||
static gfxFloat
|
||
StableRound(gfxFloat aValue)
|
||
{
|
||
// Values slightly less than 0.5 should round up like 0.5 would; we're
|
||
// assuming they were meant to be 0.5.
|
||
return floor(aValue + 0.5001);
|
||
}
|
||
|
||
static gfxPoint
|
||
StableRound(const gfxPoint& aPoint)
|
||
{
|
||
return gfxPoint(StableRound(aPoint.x), StableRound(aPoint.y));
|
||
}
|
||
|
||
/**
|
||
* Given a set of input parameters, compute certain output parameters
|
||
* for drawing an image with the image snapping algorithm.
|
||
* See https://wiki.mozilla.org/Gecko:Image_Snapping_and_Rendering
|
||
*
|
||
* @see nsLayoutUtils::DrawImage() for the descriptions of input parameters
|
||
*/
|
||
static SnappedImageDrawingParameters
|
||
ComputeSnappedImageDrawingParameters(gfxContext* aCtx,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
const nsRect aDest,
|
||
const nsRect aFill,
|
||
const nsPoint aAnchor,
|
||
const nsRect aDirty,
|
||
imgIContainer* aImage,
|
||
GraphicsFilter aGraphicsFilter,
|
||
uint32_t aImageFlags)
|
||
{
|
||
if (aDest.IsEmpty() || aFill.IsEmpty())
|
||
return SnappedImageDrawingParameters();
|
||
|
||
// Avoid unnecessarily large offsets.
|
||
bool doTile = !aDest.Contains(aFill);
|
||
nsRect appUnitDest = doTile ? TileNearRect(aDest, aFill.Intersect(aDirty))
|
||
: aDest;
|
||
nsPoint anchor = aAnchor + (appUnitDest.TopLeft() - aDest.TopLeft());
|
||
|
||
gfxRect devPixelDest =
|
||
nsLayoutUtils::RectToGfxRect(appUnitDest, aAppUnitsPerDevPixel);
|
||
gfxRect devPixelFill =
|
||
nsLayoutUtils::RectToGfxRect(aFill, aAppUnitsPerDevPixel);
|
||
gfxRect devPixelDirty =
|
||
nsLayoutUtils::RectToGfxRect(aDirty, aAppUnitsPerDevPixel);
|
||
|
||
gfxMatrix currentMatrix = aCtx->CurrentMatrix();
|
||
gfxRect fill = devPixelFill;
|
||
gfxRect dest = devPixelDest;
|
||
bool didSnap;
|
||
// Snap even if we have a scale in the context. But don't snap if
|
||
// we have something that's not translation+scale, or if the scale flips in
|
||
// the X or Y direction, because snapped image drawing can't handle that yet.
|
||
if (!currentMatrix.HasNonAxisAlignedTransform() &&
|
||
currentMatrix._11 > 0.0 && currentMatrix._22 > 0.0 &&
|
||
aCtx->UserToDevicePixelSnapped(fill, true) &&
|
||
aCtx->UserToDevicePixelSnapped(dest, true)) {
|
||
// We snapped. On this code path, |fill| and |dest| take into account
|
||
// currentMatrix's transform.
|
||
didSnap = true;
|
||
} else {
|
||
// We didn't snap. On this code path, |fill| and |dest| do not take into
|
||
// account currentMatrix's transform.
|
||
didSnap = false;
|
||
fill = devPixelFill;
|
||
dest = devPixelDest;
|
||
}
|
||
|
||
// If we snapped above, |dest| already takes into account |currentMatrix|'s scale
|
||
// and has integer coordinates. If not, we need these properties to compute
|
||
// the optimal drawn image size, so compute |snappedDestSize| here.
|
||
gfxSize snappedDestSize = dest.Size();
|
||
if (!didSnap) {
|
||
gfxSize scaleFactors = currentMatrix.ScaleFactors(true);
|
||
snappedDestSize.Scale(scaleFactors.width, scaleFactors.height);
|
||
snappedDestSize.width = NS_round(snappedDestSize.width);
|
||
snappedDestSize.height = NS_round(snappedDestSize.height);
|
||
}
|
||
|
||
// We need to be sure that this is at least one pixel in width and height,
|
||
// or we'll end up drawing nothing even if we have a nonempty fill.
|
||
snappedDestSize.width = std::max(snappedDestSize.width, 1.0);
|
||
snappedDestSize.height = std::max(snappedDestSize.height, 1.0);
|
||
|
||
// Bail if we're not going to end up drawing anything.
|
||
if (fill.IsEmpty() || snappedDestSize.IsEmpty()) {
|
||
return SnappedImageDrawingParameters();
|
||
}
|
||
|
||
nsIntSize intImageSize =
|
||
aImage->OptimalImageSizeForDest(snappedDestSize,
|
||
imgIContainer::FRAME_CURRENT,
|
||
aGraphicsFilter, aImageFlags);
|
||
gfxSize imageSize(intImageSize.width, intImageSize.height);
|
||
|
||
// XXX(seth): May be buggy; see bug 1151016.
|
||
CSSIntSize svgViewportSize = currentMatrix.IsIdentity()
|
||
? CSSIntSize(intImageSize.width, intImageSize.height)
|
||
: CSSIntSize(devPixelDest.width, devPixelDest.height);
|
||
|
||
// Compute the set of pixels that would be sampled by an ideal rendering
|
||
gfxPoint subimageTopLeft =
|
||
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.TopLeft());
|
||
gfxPoint subimageBottomRight =
|
||
MapToFloatImagePixels(imageSize, devPixelDest, devPixelFill.BottomRight());
|
||
gfxRect subimage;
|
||
subimage.MoveTo(NSToIntFloor(subimageTopLeft.x),
|
||
NSToIntFloor(subimageTopLeft.y));
|
||
subimage.SizeTo(NSToIntCeil(subimageBottomRight.x) - subimage.x,
|
||
NSToIntCeil(subimageBottomRight.y) - subimage.y);
|
||
|
||
gfxMatrix transform;
|
||
gfxMatrix invTransform;
|
||
|
||
bool anchorAtUpperLeft = anchor.x == appUnitDest.x &&
|
||
anchor.y == appUnitDest.y;
|
||
bool exactlyOneImageCopy = aFill.IsEqualEdges(appUnitDest);
|
||
if (anchorAtUpperLeft && exactlyOneImageCopy) {
|
||
// The simple case: we can ignore the anchor point and compute the
|
||
// transformation from the sampled region (the subimage) to the fill rect.
|
||
// This approach is preferable when it works since it tends to produce
|
||
// less numerical error.
|
||
transform = TransformBetweenRects(subimage, fill);
|
||
invTransform = TransformBetweenRects(fill, subimage);
|
||
} else {
|
||
// The more complicated case: we compute the transformation from the
|
||
// image rect positioned at the image space anchor point to the dest rect
|
||
// positioned at the device space anchor point.
|
||
|
||
// Compute the anchor point in both device space and image space. This
|
||
// code assumes that pixel-based devices have one pixel per device unit!
|
||
gfxPoint anchorPoint(gfxFloat(anchor.x)/aAppUnitsPerDevPixel,
|
||
gfxFloat(anchor.y)/aAppUnitsPerDevPixel);
|
||
gfxPoint imageSpaceAnchorPoint =
|
||
MapToFloatImagePixels(imageSize, devPixelDest, anchorPoint);
|
||
|
||
if (didSnap) {
|
||
imageSpaceAnchorPoint = StableRound(imageSpaceAnchorPoint);
|
||
anchorPoint = imageSpaceAnchorPoint;
|
||
anchorPoint = MapToFloatUserPixels(imageSize, devPixelDest, anchorPoint);
|
||
anchorPoint = currentMatrix.Transform(anchorPoint);
|
||
anchorPoint = StableRound(anchorPoint);
|
||
}
|
||
|
||
// Compute an unsnapped version of the dest rect's size. We continue to
|
||
// follow the pattern that we take |currentMatrix| into account only if
|
||
// |didSnap| is true.
|
||
gfxSize unsnappedDestSize
|
||
= didSnap ? devPixelDest.Size() * currentMatrix.ScaleFactors(true)
|
||
: devPixelDest.Size();
|
||
|
||
gfxRect anchoredDestRect(anchorPoint, unsnappedDestSize);
|
||
gfxRect anchoredImageRect(imageSpaceAnchorPoint, imageSize);
|
||
|
||
// Calculate anchoredDestRect with snapped fill rect when the devPixelFill rect
|
||
// corresponds to just a single tile in that direction
|
||
if (fill.Width() != devPixelFill.Width() &&
|
||
devPixelDest.x == devPixelFill.x &&
|
||
devPixelDest.XMost() == devPixelFill.XMost()) {
|
||
anchoredDestRect.width = fill.width;
|
||
}
|
||
if (fill.Height() != devPixelFill.Height() &&
|
||
devPixelDest.y == devPixelFill.y &&
|
||
devPixelDest.YMost() == devPixelFill.YMost()) {
|
||
anchoredDestRect.height = fill.height;
|
||
}
|
||
|
||
transform = TransformBetweenRects(anchoredImageRect, anchoredDestRect);
|
||
invTransform = TransformBetweenRects(anchoredDestRect, anchoredImageRect);
|
||
}
|
||
|
||
// If the transform is not a straight translation by integers, then
|
||
// filtering will occur, and restricting the fill rect to the dirty rect
|
||
// would change the values computed for edge pixels, which we can't allow.
|
||
// Also, if 'didSnap' is false then rounding out 'devPixelDirty' might not
|
||
// produce pixel-aligned coordinates, which would also break the values
|
||
// computed for edge pixels.
|
||
if (didSnap && !invTransform.HasNonIntegerTranslation()) {
|
||
// This form of Transform is safe to call since non-axis-aligned
|
||
// transforms wouldn't be snapped.
|
||
devPixelDirty = currentMatrix.Transform(devPixelDirty);
|
||
devPixelDirty.RoundOut();
|
||
fill = fill.Intersect(devPixelDirty);
|
||
}
|
||
if (fill.IsEmpty())
|
||
return SnappedImageDrawingParameters();
|
||
|
||
gfxRect imageSpaceFill(didSnap ? invTransform.Transform(fill)
|
||
: invTransform.TransformBounds(fill));
|
||
|
||
// If we didn't snap, we need to post-multiply the matrix on the context to
|
||
// get the final matrix we'll draw with, because we didn't take it into
|
||
// account when computing the matrices above.
|
||
if (!didSnap) {
|
||
transform = transform * currentMatrix;
|
||
}
|
||
|
||
ImageRegion region =
|
||
ImageRegion::CreateWithSamplingRestriction(imageSpaceFill, subimage);
|
||
|
||
return SnappedImageDrawingParameters(transform, intImageSize,
|
||
region, svgViewportSize);
|
||
}
|
||
|
||
|
||
static DrawResult
|
||
DrawImageInternal(gfxContext& aContext,
|
||
nsPresContext* aPresContext,
|
||
imgIContainer* aImage,
|
||
GraphicsFilter aGraphicsFilter,
|
||
const nsRect& aDest,
|
||
const nsRect& aFill,
|
||
const nsPoint& aAnchor,
|
||
const nsRect& aDirty,
|
||
const SVGImageContext* aSVGContext,
|
||
uint32_t aImageFlags)
|
||
{
|
||
if (aPresContext->Type() == nsPresContext::eContext_Print) {
|
||
// We want vector images to be passed on as vector commands, not a raster
|
||
// image.
|
||
aImageFlags |= imgIContainer::FLAG_BYPASS_SURFACE_CACHE;
|
||
}
|
||
if (aDest.Contains(aFill)) {
|
||
aImageFlags |= imgIContainer::FLAG_CLAMP;
|
||
}
|
||
int32_t appUnitsPerDevPixel =
|
||
aPresContext->AppUnitsPerDevPixel();
|
||
|
||
SnappedImageDrawingParameters params =
|
||
ComputeSnappedImageDrawingParameters(&aContext, appUnitsPerDevPixel, aDest,
|
||
aFill, aAnchor, aDirty, aImage,
|
||
aGraphicsFilter, aImageFlags);
|
||
|
||
if (!params.shouldDraw) {
|
||
return DrawResult::SUCCESS;
|
||
}
|
||
|
||
gfxContextMatrixAutoSaveRestore contextMatrixRestorer(&aContext);
|
||
aContext.SetMatrix(params.imageSpaceToDeviceSpace);
|
||
|
||
Maybe<SVGImageContext> svgContext = ToMaybe(aSVGContext);
|
||
if (!svgContext) {
|
||
// Use the default viewport.
|
||
svgContext = Some(SVGImageContext(params.svgViewportSize, Nothing()));
|
||
}
|
||
|
||
return aImage->Draw(&aContext, params.size, params.region,
|
||
imgIContainer::FRAME_CURRENT, aGraphicsFilter,
|
||
svgContext, aImageFlags);
|
||
}
|
||
|
||
/* static */ DrawResult
|
||
nsLayoutUtils::DrawSingleUnscaledImage(gfxContext& aContext,
|
||
nsPresContext* aPresContext,
|
||
imgIContainer* aImage,
|
||
GraphicsFilter aGraphicsFilter,
|
||
const nsPoint& aDest,
|
||
const nsRect* aDirty,
|
||
uint32_t aImageFlags,
|
||
const nsRect* aSourceArea)
|
||
{
|
||
CSSIntSize imageSize;
|
||
aImage->GetWidth(&imageSize.width);
|
||
aImage->GetHeight(&imageSize.height);
|
||
if (imageSize.width < 1 || imageSize.height < 1) {
|
||
NS_WARNING("Image width or height is non-positive");
|
||
return DrawResult::TEMPORARY_ERROR;
|
||
}
|
||
|
||
nsSize size(CSSPixel::ToAppUnits(imageSize));
|
||
nsRect source;
|
||
if (aSourceArea) {
|
||
source = *aSourceArea;
|
||
} else {
|
||
source.SizeTo(size);
|
||
}
|
||
|
||
nsRect dest(aDest - source.TopLeft(), size);
|
||
nsRect fill(aDest, source.Size());
|
||
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
||
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
||
// translation but we don't want to actually tile the image.
|
||
fill.IntersectRect(fill, dest);
|
||
return DrawImageInternal(aContext, aPresContext,
|
||
aImage, aGraphicsFilter,
|
||
dest, fill, aDest, aDirty ? *aDirty : dest,
|
||
nullptr, aImageFlags);
|
||
}
|
||
|
||
/* static */ DrawResult
|
||
nsLayoutUtils::DrawSingleImage(gfxContext& aContext,
|
||
nsPresContext* aPresContext,
|
||
imgIContainer* aImage,
|
||
GraphicsFilter aGraphicsFilter,
|
||
const nsRect& aDest,
|
||
const nsRect& aDirty,
|
||
const SVGImageContext* aSVGContext,
|
||
uint32_t aImageFlags,
|
||
const nsPoint* aAnchorPoint,
|
||
const nsRect* aSourceArea)
|
||
{
|
||
nscoord appUnitsPerCSSPixel = nsDeviceContext::AppUnitsPerCSSPixel();
|
||
CSSIntSize pixelImageSize(ComputeSizeForDrawingWithFallback(aImage, aDest.Size()));
|
||
if (pixelImageSize.width < 1 || pixelImageSize.height < 1) {
|
||
NS_WARNING("Image width or height is non-positive");
|
||
return DrawResult::TEMPORARY_ERROR;
|
||
}
|
||
|
||
nsSize imageSize(CSSPixel::ToAppUnits(pixelImageSize));
|
||
nsRect source;
|
||
nsCOMPtr<imgIContainer> image;
|
||
if (aSourceArea) {
|
||
source = *aSourceArea;
|
||
nsIntRect subRect(source.x, source.y, source.width, source.height);
|
||
subRect.ScaleInverseRoundOut(appUnitsPerCSSPixel);
|
||
image = ImageOps::Clip(aImage, subRect);
|
||
|
||
nsRect imageRect;
|
||
imageRect.SizeTo(imageSize);
|
||
nsRect clippedSource = imageRect.Intersect(source);
|
||
|
||
source -= clippedSource.TopLeft();
|
||
imageSize = clippedSource.Size();
|
||
} else {
|
||
source.SizeTo(imageSize);
|
||
image = aImage;
|
||
}
|
||
|
||
nsRect dest = GetWholeImageDestination(imageSize, source, aDest);
|
||
|
||
// Ensure that only a single image tile is drawn. If aSourceArea extends
|
||
// outside the image bounds, we want to honor the aSourceArea-to-aDest
|
||
// transform but we don't want to actually tile the image.
|
||
nsRect fill;
|
||
fill.IntersectRect(aDest, dest);
|
||
return DrawImageInternal(aContext, aPresContext, image,
|
||
aGraphicsFilter, dest, fill,
|
||
aAnchorPoint ? *aAnchorPoint : fill.TopLeft(),
|
||
aDirty, aSVGContext, aImageFlags);
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::ComputeSizeForDrawing(imgIContainer *aImage,
|
||
CSSIntSize& aImageSize, /*outparam*/
|
||
nsSize& aIntrinsicRatio, /*outparam*/
|
||
bool& aGotWidth, /*outparam*/
|
||
bool& aGotHeight /*outparam*/)
|
||
{
|
||
aGotWidth = NS_SUCCEEDED(aImage->GetWidth(&aImageSize.width));
|
||
aGotHeight = NS_SUCCEEDED(aImage->GetHeight(&aImageSize.height));
|
||
bool gotRatio = NS_SUCCEEDED(aImage->GetIntrinsicRatio(&aIntrinsicRatio));
|
||
|
||
if (!(aGotWidth && aGotHeight) && !gotRatio) {
|
||
// We hit an error (say, because the image failed to load or couldn't be
|
||
// decoded) and should return zero size.
|
||
aGotWidth = aGotHeight = true;
|
||
aImageSize = CSSIntSize(0, 0);
|
||
aIntrinsicRatio = nsSize(0, 0);
|
||
}
|
||
}
|
||
|
||
/* static */ CSSIntSize
|
||
nsLayoutUtils::ComputeSizeForDrawingWithFallback(imgIContainer* aImage,
|
||
const nsSize& aFallbackSize)
|
||
{
|
||
CSSIntSize imageSize;
|
||
nsSize imageRatio;
|
||
bool gotHeight, gotWidth;
|
||
ComputeSizeForDrawing(aImage, imageSize, imageRatio, gotWidth, gotHeight);
|
||
|
||
// If we didn't get both width and height, try to compute them using the
|
||
// intrinsic ratio of the image.
|
||
if (gotWidth != gotHeight) {
|
||
if (!gotWidth) {
|
||
if (imageRatio.height != 0) {
|
||
imageSize.width =
|
||
NSCoordSaturatingNonnegativeMultiply(imageSize.height,
|
||
float(imageRatio.width) /
|
||
float(imageRatio.height));
|
||
gotWidth = true;
|
||
}
|
||
} else {
|
||
if (imageRatio.width != 0) {
|
||
imageSize.height =
|
||
NSCoordSaturatingNonnegativeMultiply(imageSize.width,
|
||
float(imageRatio.height) /
|
||
float(imageRatio.width));
|
||
gotHeight = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
// If we still don't have a width or height, just use the fallback size the
|
||
// caller provided.
|
||
if (!gotWidth) {
|
||
imageSize.width = nsPresContext::AppUnitsToIntCSSPixels(aFallbackSize.width);
|
||
}
|
||
if (!gotHeight) {
|
||
imageSize.height = nsPresContext::AppUnitsToIntCSSPixels(aFallbackSize.height);
|
||
}
|
||
|
||
return imageSize;
|
||
}
|
||
|
||
/* static */ DrawResult
|
||
nsLayoutUtils::DrawBackgroundImage(gfxContext& aContext,
|
||
nsPresContext* aPresContext,
|
||
imgIContainer* aImage,
|
||
const CSSIntSize& aImageSize,
|
||
GraphicsFilter aGraphicsFilter,
|
||
const nsRect& aDest,
|
||
const nsRect& aFill,
|
||
const nsPoint& aAnchor,
|
||
const nsRect& aDirty,
|
||
uint32_t aImageFlags)
|
||
{
|
||
PROFILER_LABEL("layout", "nsLayoutUtils::DrawBackgroundImage",
|
||
js::ProfileEntry::Category::GRAPHICS);
|
||
|
||
if (UseBackgroundNearestFiltering()) {
|
||
aGraphicsFilter = GraphicsFilter::FILTER_NEAREST;
|
||
}
|
||
|
||
SVGImageContext svgContext(aImageSize, Nothing());
|
||
|
||
return DrawImageInternal(aContext, aPresContext, aImage,
|
||
aGraphicsFilter, aDest, aFill, aAnchor,
|
||
aDirty, &svgContext, aImageFlags);
|
||
}
|
||
|
||
/* static */ DrawResult
|
||
nsLayoutUtils::DrawImage(gfxContext& aContext,
|
||
nsPresContext* aPresContext,
|
||
imgIContainer* aImage,
|
||
GraphicsFilter aGraphicsFilter,
|
||
const nsRect& aDest,
|
||
const nsRect& aFill,
|
||
const nsPoint& aAnchor,
|
||
const nsRect& aDirty,
|
||
uint32_t aImageFlags)
|
||
{
|
||
return DrawImageInternal(aContext, aPresContext, aImage,
|
||
aGraphicsFilter, aDest, aFill, aAnchor,
|
||
aDirty, nullptr, aImageFlags);
|
||
}
|
||
|
||
/* static */ nsRect
|
||
nsLayoutUtils::GetWholeImageDestination(const nsSize& aWholeImageSize,
|
||
const nsRect& aImageSourceArea,
|
||
const nsRect& aDestArea)
|
||
{
|
||
double scaleX = double(aDestArea.width)/aImageSourceArea.width;
|
||
double scaleY = double(aDestArea.height)/aImageSourceArea.height;
|
||
nscoord destOffsetX = NSToCoordRound(aImageSourceArea.x*scaleX);
|
||
nscoord destOffsetY = NSToCoordRound(aImageSourceArea.y*scaleY);
|
||
nscoord wholeSizeX = NSToCoordRound(aWholeImageSize.width*scaleX);
|
||
nscoord wholeSizeY = NSToCoordRound(aWholeImageSize.height*scaleY);
|
||
return nsRect(aDestArea.TopLeft() - nsPoint(destOffsetX, destOffsetY),
|
||
nsSize(wholeSizeX, wholeSizeY));
|
||
}
|
||
|
||
/* static */ already_AddRefed<imgIContainer>
|
||
nsLayoutUtils::OrientImage(imgIContainer* aContainer,
|
||
const nsStyleImageOrientation& aOrientation)
|
||
{
|
||
MOZ_ASSERT(aContainer, "Should have an image container");
|
||
nsCOMPtr<imgIContainer> img(aContainer);
|
||
|
||
if (aOrientation.IsFromImage()) {
|
||
img = ImageOps::Orient(img, img->GetOrientation());
|
||
} else if (!aOrientation.IsDefault()) {
|
||
Angle angle = aOrientation.Angle();
|
||
Flip flip = aOrientation.IsFlipped() ? Flip::Horizontal
|
||
: Flip::Unflipped;
|
||
img = ImageOps::Orient(img, Orientation(angle, flip));
|
||
}
|
||
|
||
return img.forget();
|
||
}
|
||
|
||
static bool NonZeroStyleCoord(const nsStyleCoord& aCoord)
|
||
{
|
||
if (aCoord.IsCoordPercentCalcUnit()) {
|
||
// Since negative results are clamped to 0, check > 0.
|
||
return nsRuleNode::ComputeCoordPercentCalc(aCoord, nscoord_MAX) > 0 ||
|
||
nsRuleNode::ComputeCoordPercentCalc(aCoord, 0) > 0;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::HasNonZeroCorner(const nsStyleCorners& aCorners)
|
||
{
|
||
NS_FOR_CSS_HALF_CORNERS(corner) {
|
||
if (NonZeroStyleCoord(aCorners.Get(corner)))
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
// aCorner is a "full corner" value, i.e. NS_CORNER_TOP_LEFT etc
|
||
static bool IsCornerAdjacentToSide(uint8_t aCorner, css::Side aSide)
|
||
{
|
||
PR_STATIC_ASSERT((int)NS_SIDE_TOP == NS_CORNER_TOP_LEFT);
|
||
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == NS_CORNER_TOP_RIGHT);
|
||
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == NS_CORNER_BOTTOM_RIGHT);
|
||
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == NS_CORNER_BOTTOM_LEFT);
|
||
PR_STATIC_ASSERT((int)NS_SIDE_TOP == ((NS_CORNER_TOP_RIGHT - 1)&3));
|
||
PR_STATIC_ASSERT((int)NS_SIDE_RIGHT == ((NS_CORNER_BOTTOM_RIGHT - 1)&3));
|
||
PR_STATIC_ASSERT((int)NS_SIDE_BOTTOM == ((NS_CORNER_BOTTOM_LEFT - 1)&3));
|
||
PR_STATIC_ASSERT((int)NS_SIDE_LEFT == ((NS_CORNER_TOP_LEFT - 1)&3));
|
||
|
||
return aSide == aCorner || aSide == ((aCorner - 1)&3);
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::HasNonZeroCornerOnSide(const nsStyleCorners& aCorners,
|
||
css::Side aSide)
|
||
{
|
||
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_X/2 == NS_CORNER_TOP_LEFT);
|
||
PR_STATIC_ASSERT(NS_CORNER_TOP_LEFT_Y/2 == NS_CORNER_TOP_LEFT);
|
||
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_X/2 == NS_CORNER_TOP_RIGHT);
|
||
PR_STATIC_ASSERT(NS_CORNER_TOP_RIGHT_Y/2 == NS_CORNER_TOP_RIGHT);
|
||
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_X/2 == NS_CORNER_BOTTOM_RIGHT);
|
||
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_RIGHT_Y/2 == NS_CORNER_BOTTOM_RIGHT);
|
||
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_X/2 == NS_CORNER_BOTTOM_LEFT);
|
||
PR_STATIC_ASSERT(NS_CORNER_BOTTOM_LEFT_Y/2 == NS_CORNER_BOTTOM_LEFT);
|
||
|
||
NS_FOR_CSS_HALF_CORNERS(corner) {
|
||
// corner is a "half corner" value, so dividing by two gives us a
|
||
// "full corner" value.
|
||
if (NonZeroStyleCoord(aCorners.Get(corner)) &&
|
||
IsCornerAdjacentToSide(corner/2, aSide))
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */ nsTransparencyMode
|
||
nsLayoutUtils::GetFrameTransparency(nsIFrame* aBackgroundFrame,
|
||
nsIFrame* aCSSRootFrame) {
|
||
if (aCSSRootFrame->StyleDisplay()->mOpacity < 1.0f)
|
||
return eTransparencyTransparent;
|
||
|
||
if (HasNonZeroCorner(aCSSRootFrame->StyleBorder()->mBorderRadius))
|
||
return eTransparencyTransparent;
|
||
|
||
if (aCSSRootFrame->StyleDisplay()->mAppearance == NS_THEME_WIN_GLASS)
|
||
return eTransparencyGlass;
|
||
|
||
if (aCSSRootFrame->StyleDisplay()->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS)
|
||
return eTransparencyBorderlessGlass;
|
||
|
||
nsITheme::Transparency transparency;
|
||
if (aCSSRootFrame->IsThemed(&transparency))
|
||
return transparency == nsITheme::eTransparent
|
||
? eTransparencyTransparent
|
||
: eTransparencyOpaque;
|
||
|
||
// We need an uninitialized window to be treated as opaque because
|
||
// doing otherwise breaks window display effects on some platforms,
|
||
// specifically Vista. (bug 450322)
|
||
if (aBackgroundFrame->GetType() == nsGkAtoms::viewportFrame &&
|
||
!aBackgroundFrame->GetFirstPrincipalChild()) {
|
||
return eTransparencyOpaque;
|
||
}
|
||
|
||
nsStyleContext* bgSC;
|
||
if (!nsCSSRendering::FindBackground(aBackgroundFrame, &bgSC)) {
|
||
return eTransparencyTransparent;
|
||
}
|
||
const nsStyleBackground* bg = bgSC->StyleBackground();
|
||
if (NS_GET_A(bg->mBackgroundColor) < 255 ||
|
||
// bottom layer's clip is used for the color
|
||
bg->BottomLayer().mClip != NS_STYLE_BG_CLIP_BORDER)
|
||
return eTransparencyTransparent;
|
||
return eTransparencyOpaque;
|
||
}
|
||
|
||
static bool IsPopupFrame(nsIFrame* aFrame)
|
||
{
|
||
// aFrame is a popup it's the list control frame dropdown for a combobox.
|
||
nsIAtom* frameType = aFrame->GetType();
|
||
if (frameType == nsGkAtoms::listControlFrame) {
|
||
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(aFrame);
|
||
return lcf->IsInDropDownMode();
|
||
}
|
||
|
||
// ... or if it's a XUL menupopup frame.
|
||
return frameType == nsGkAtoms::menuPopupFrame;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::IsPopup(nsIFrame* aFrame)
|
||
{
|
||
// Optimization: the frame can't possibly be a popup if it has no view.
|
||
if (!aFrame->HasView()) {
|
||
NS_ASSERTION(!IsPopupFrame(aFrame), "popup frame must have a view");
|
||
return false;
|
||
}
|
||
return IsPopupFrame(aFrame);
|
||
}
|
||
|
||
/* static */ nsIFrame*
|
||
nsLayoutUtils::GetDisplayRootFrame(nsIFrame* aFrame)
|
||
{
|
||
// We could use GetRootPresContext() here if the
|
||
// NS_FRAME_IN_POPUP frame bit is set.
|
||
nsIFrame* f = aFrame;
|
||
for (;;) {
|
||
if (!f->HasAnyStateBits(NS_FRAME_IN_POPUP)) {
|
||
f = f->PresContext()->FrameManager()->GetRootFrame();
|
||
} else if (IsPopup(f)) {
|
||
return f;
|
||
}
|
||
nsIFrame* parent = GetCrossDocParentFrame(f);
|
||
if (!parent)
|
||
return f;
|
||
f = parent;
|
||
}
|
||
}
|
||
|
||
/* static */ nsIFrame*
|
||
nsLayoutUtils::GetReferenceFrame(nsIFrame* aFrame)
|
||
{
|
||
nsIFrame *f = aFrame;
|
||
for (;;) {
|
||
if (f->IsTransformed() || IsPopup(f)) {
|
||
return f;
|
||
}
|
||
nsIFrame* parent = GetCrossDocParentFrame(f);
|
||
if (!parent) {
|
||
return f;
|
||
}
|
||
f = parent;
|
||
}
|
||
}
|
||
|
||
/* static */ nsIFrame*
|
||
nsLayoutUtils::GetTransformRootFrame(nsIFrame* aFrame)
|
||
{
|
||
nsIFrame *parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
|
||
while (parent && parent->Preserves3DChildren()) {
|
||
parent = nsLayoutUtils::GetCrossDocParentFrame(parent);
|
||
}
|
||
return parent;
|
||
}
|
||
|
||
/* static */ uint32_t
|
||
nsLayoutUtils::GetTextRunFlagsForStyle(nsStyleContext* aStyleContext,
|
||
const nsStyleFont* aStyleFont,
|
||
const nsStyleText* aStyleText,
|
||
nscoord aLetterSpacing)
|
||
{
|
||
uint32_t result = 0;
|
||
if (aLetterSpacing != 0) {
|
||
result |= gfxTextRunFactory::TEXT_DISABLE_OPTIONAL_LIGATURES;
|
||
}
|
||
if (aStyleText->mControlCharacterVisibility == NS_STYLE_CONTROL_CHARACTER_VISIBILITY_HIDDEN) {
|
||
result |= gfxTextRunFactory::TEXT_HIDE_CONTROL_CHARACTERS;
|
||
}
|
||
switch (aStyleContext->StyleSVG()->mTextRendering) {
|
||
case NS_STYLE_TEXT_RENDERING_OPTIMIZESPEED:
|
||
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
||
break;
|
||
case NS_STYLE_TEXT_RENDERING_AUTO:
|
||
if (aStyleFont->mFont.size <
|
||
aStyleContext->PresContext()->GetAutoQualityMinFontSize()) {
|
||
result |= gfxTextRunFactory::TEXT_OPTIMIZE_SPEED;
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
return result | GetTextRunOrientFlagsForStyle(aStyleContext);
|
||
}
|
||
|
||
/* static */ uint32_t
|
||
nsLayoutUtils::GetTextRunOrientFlagsForStyle(nsStyleContext* aStyleContext)
|
||
{
|
||
WritingMode wm(aStyleContext);
|
||
if (wm.IsVertical()) {
|
||
switch (aStyleContext->StyleVisibility()->mTextOrientation) {
|
||
case NS_STYLE_TEXT_ORIENTATION_MIXED:
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_MIXED;
|
||
case NS_STYLE_TEXT_ORIENTATION_UPRIGHT:
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_UPRIGHT;
|
||
case NS_STYLE_TEXT_ORIENTATION_SIDEWAYS:
|
||
// This should depend on writing mode vertical-lr vs vertical-rl,
|
||
// but until we support SIDEWAYS_LEFT, we'll treat this the same
|
||
// as SIDEWAYS_RIGHT and simply fall through.
|
||
/*
|
||
if (wm.IsVerticalLR()) {
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_SIDEWAYS_LEFT;
|
||
} else {
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
||
}
|
||
*/
|
||
case NS_STYLE_TEXT_ORIENTATION_SIDEWAYS_RIGHT:
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_SIDEWAYS_RIGHT;
|
||
case NS_STYLE_TEXT_ORIENTATION_SIDEWAYS_LEFT:
|
||
// Not yet supported, so fall through to the default (error) case.
|
||
/*
|
||
return gfxTextRunFactory::TEXT_ORIENT_VERTICAL_SIDEWAYS_LEFT;
|
||
*/
|
||
default:
|
||
NS_NOTREACHED("unknown text-orientation");
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::GetRectDifferenceStrips(const nsRect& aR1, const nsRect& aR2,
|
||
nsRect* aHStrip, nsRect* aVStrip) {
|
||
NS_ASSERTION(aR1.TopLeft() == aR2.TopLeft(),
|
||
"expected rects at the same position");
|
||
nsRect unionRect(aR1.x, aR1.y, std::max(aR1.width, aR2.width),
|
||
std::max(aR1.height, aR2.height));
|
||
nscoord VStripStart = std::min(aR1.width, aR2.width);
|
||
nscoord HStripStart = std::min(aR1.height, aR2.height);
|
||
*aVStrip = unionRect;
|
||
aVStrip->x += VStripStart;
|
||
aVStrip->width -= VStripStart;
|
||
*aHStrip = unionRect;
|
||
aHStrip->y += HStripStart;
|
||
aHStrip->height -= HStripStart;
|
||
}
|
||
|
||
nsDeviceContext*
|
||
nsLayoutUtils::GetDeviceContextForScreenInfo(nsPIDOMWindow* aWindow)
|
||
{
|
||
if (!aWindow) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell();
|
||
while (docShell) {
|
||
// Now make sure our size is up to date. That will mean that the device
|
||
// context does the right thing on multi-monitor systems when we return it to
|
||
// the caller. It will also make sure that our prescontext has been created,
|
||
// if we're supposed to have one.
|
||
nsCOMPtr<nsPIDOMWindow> win = docShell->GetWindow();
|
||
if (!win) {
|
||
// No reason to go on
|
||
return nullptr;
|
||
}
|
||
|
||
win->EnsureSizeUpToDate();
|
||
|
||
nsRefPtr<nsPresContext> presContext;
|
||
docShell->GetPresContext(getter_AddRefs(presContext));
|
||
if (presContext) {
|
||
nsDeviceContext* context = presContext->DeviceContext();
|
||
if (context) {
|
||
return context;
|
||
}
|
||
}
|
||
|
||
nsCOMPtr<nsIDocShellTreeItem> parentItem;
|
||
docShell->GetParent(getter_AddRefs(parentItem));
|
||
docShell = do_QueryInterface(parentItem);
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::IsReallyFixedPos(nsIFrame* aFrame)
|
||
{
|
||
NS_PRECONDITION(aFrame->GetParent(),
|
||
"IsReallyFixedPos called on frame not in tree");
|
||
NS_PRECONDITION(aFrame->StyleDisplay()->mPosition ==
|
||
NS_STYLE_POSITION_FIXED,
|
||
"IsReallyFixedPos called on non-'position:fixed' frame");
|
||
|
||
nsIAtom *parentType = aFrame->GetParent()->GetType();
|
||
return parentType == nsGkAtoms::viewportFrame ||
|
||
parentType == nsGkAtoms::pageContentFrame;
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult
|
||
nsLayoutUtils::SurfaceFromElement(nsIImageLoadingContent* aElement,
|
||
uint32_t aSurfaceFlags,
|
||
DrawTarget* aTarget)
|
||
{
|
||
SurfaceFromElementResult result;
|
||
nsresult rv;
|
||
|
||
nsCOMPtr<imgIRequest> imgRequest;
|
||
rv = aElement->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
|
||
getter_AddRefs(imgRequest));
|
||
if (NS_FAILED(rv) || !imgRequest)
|
||
return result;
|
||
|
||
uint32_t status;
|
||
imgRequest->GetImageStatus(&status);
|
||
result.mHasSize = status & imgIRequest::STATUS_SIZE_AVAILABLE;
|
||
if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
|
||
// Spec says to use GetComplete, but that only works on
|
||
// nsIDOMHTMLImageElement, and we support all sorts of other stuff
|
||
// here. Do this for now pending spec clarification.
|
||
result.mIsStillLoading = (status & imgIRequest::STATUS_ERROR) == 0;
|
||
return result;
|
||
}
|
||
|
||
nsCOMPtr<nsIPrincipal> principal;
|
||
rv = imgRequest->GetImagePrincipal(getter_AddRefs(principal));
|
||
if (NS_FAILED(rv))
|
||
return result;
|
||
|
||
nsCOMPtr<imgIContainer> imgContainer;
|
||
rv = imgRequest->GetImage(getter_AddRefs(imgContainer));
|
||
if (NS_FAILED(rv))
|
||
return result;
|
||
|
||
uint32_t noRasterize = aSurfaceFlags & SFE_NO_RASTERIZING_VECTORS;
|
||
|
||
uint32_t whichFrame = (aSurfaceFlags & SFE_WANT_FIRST_FRAME)
|
||
? (uint32_t) imgIContainer::FRAME_FIRST
|
||
: (uint32_t) imgIContainer::FRAME_CURRENT;
|
||
uint32_t frameFlags = imgIContainer::FLAG_SYNC_DECODE;
|
||
if (aSurfaceFlags & SFE_NO_COLORSPACE_CONVERSION)
|
||
frameFlags |= imgIContainer::FLAG_DECODE_NO_COLORSPACE_CONVERSION;
|
||
if (aSurfaceFlags & SFE_PREFER_NO_PREMULTIPLY_ALPHA) {
|
||
frameFlags |= imgIContainer::FLAG_DECODE_NO_PREMULTIPLY_ALPHA;
|
||
result.mIsPremultiplied = false;
|
||
}
|
||
|
||
int32_t imgWidth, imgHeight;
|
||
rv = imgContainer->GetWidth(&imgWidth);
|
||
nsresult rv2 = imgContainer->GetHeight(&imgHeight);
|
||
if (NS_FAILED(rv) || NS_FAILED(rv2))
|
||
return result;
|
||
|
||
if (!noRasterize || imgContainer->GetType() == imgIContainer::TYPE_RASTER) {
|
||
if (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) {
|
||
frameFlags |= imgIContainer::FLAG_WANT_DATA_SURFACE;
|
||
}
|
||
result.mSourceSurface = imgContainer->GetFrame(whichFrame, frameFlags);
|
||
if (!result.mSourceSurface) {
|
||
return result;
|
||
}
|
||
// The surface we return is likely to be cached. We don't want to have to
|
||
// convert to a surface that's compatible with aTarget each time it's used
|
||
// (that would result in terrible performance), so we convert once here
|
||
// upfront if aTarget is specified.
|
||
if (aTarget) {
|
||
RefPtr<SourceSurface> optSurface =
|
||
aTarget->OptimizeSourceSurface(result.mSourceSurface);
|
||
if (optSurface) {
|
||
result.mSourceSurface = optSurface;
|
||
}
|
||
}
|
||
} else {
|
||
result.mDrawInfo.mImgContainer = imgContainer;
|
||
result.mDrawInfo.mWhichFrame = whichFrame;
|
||
result.mDrawInfo.mDrawingFlags = frameFlags;
|
||
}
|
||
|
||
int32_t corsmode;
|
||
if (NS_SUCCEEDED(imgRequest->GetCORSMode(&corsmode))) {
|
||
result.mCORSUsed = (corsmode != imgIRequest::CORS_NONE);
|
||
}
|
||
|
||
result.mSize = gfxIntSize(imgWidth, imgHeight);
|
||
result.mPrincipal = principal.forget();
|
||
// no images, including SVG images, can load content from another domain.
|
||
result.mIsWriteOnly = false;
|
||
result.mImageRequest = imgRequest.forget();
|
||
|
||
return result;
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult
|
||
nsLayoutUtils::SurfaceFromElement(HTMLImageElement *aElement,
|
||
uint32_t aSurfaceFlags,
|
||
DrawTarget* aTarget)
|
||
{
|
||
return SurfaceFromElement(static_cast<nsIImageLoadingContent*>(aElement),
|
||
aSurfaceFlags, aTarget);
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult
|
||
nsLayoutUtils::SurfaceFromElement(HTMLCanvasElement* aElement,
|
||
uint32_t aSurfaceFlags,
|
||
DrawTarget* aTarget)
|
||
{
|
||
SurfaceFromElementResult result;
|
||
|
||
bool* isPremultiplied = nullptr;
|
||
if (aSurfaceFlags & SFE_PREFER_NO_PREMULTIPLY_ALPHA) {
|
||
isPremultiplied = &result.mIsPremultiplied;
|
||
}
|
||
|
||
gfxIntSize size = aElement->GetSize();
|
||
|
||
result.mSourceSurface = aElement->GetSurfaceSnapshot(isPremultiplied);
|
||
if (!result.mSourceSurface) {
|
||
// If the element doesn't have a context then we won't get a snapshot. The canvas spec wants us to not error and just
|
||
// draw nothing, so return an empty surface.
|
||
DrawTarget *ref = aTarget ? aTarget : gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
|
||
RefPtr<DrawTarget> dt = ref->CreateSimilarDrawTarget(IntSize(size.width, size.height),
|
||
SurfaceFormat::B8G8R8A8);
|
||
if (dt) {
|
||
result.mSourceSurface = dt->Snapshot();
|
||
}
|
||
} else if (aTarget) {
|
||
RefPtr<SourceSurface> opt = aTarget->OptimizeSourceSurface(result.mSourceSurface);
|
||
if (opt) {
|
||
result.mSourceSurface = opt;
|
||
}
|
||
}
|
||
|
||
// Ensure that any future changes to the canvas trigger proper invalidation,
|
||
// in case this is being used by -moz-element()
|
||
aElement->MarkContextClean();
|
||
|
||
result.mHasSize = true;
|
||
result.mSize = size;
|
||
result.mPrincipal = aElement->NodePrincipal();
|
||
result.mIsWriteOnly = aElement->IsWriteOnly();
|
||
|
||
return result;
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult
|
||
nsLayoutUtils::SurfaceFromElement(HTMLVideoElement* aElement,
|
||
uint32_t aSurfaceFlags,
|
||
DrawTarget* aTarget)
|
||
{
|
||
SurfaceFromElementResult result;
|
||
|
||
NS_WARN_IF_FALSE((aSurfaceFlags & SFE_PREFER_NO_PREMULTIPLY_ALPHA) == 0, "We can't support non-premultiplied alpha for video!");
|
||
|
||
#ifdef MOZ_EME
|
||
if (aElement->ContainsRestrictedContent()) {
|
||
return result;
|
||
}
|
||
#endif
|
||
|
||
uint16_t readyState;
|
||
if (NS_SUCCEEDED(aElement->GetReadyState(&readyState)) &&
|
||
(readyState == nsIDOMHTMLMediaElement::HAVE_NOTHING ||
|
||
readyState == nsIDOMHTMLMediaElement::HAVE_METADATA)) {
|
||
result.mIsStillLoading = true;
|
||
return result;
|
||
}
|
||
|
||
// If it doesn't have a principal, just bail
|
||
nsCOMPtr<nsIPrincipal> principal = aElement->GetCurrentPrincipal();
|
||
if (!principal)
|
||
return result;
|
||
|
||
ImageContainer *container = aElement->GetImageContainer();
|
||
if (!container)
|
||
return result;
|
||
|
||
mozilla::gfx::IntSize size;
|
||
result.mSourceSurface = container->GetCurrentAsSourceSurface(&size);
|
||
if (!result.mSourceSurface)
|
||
return result;
|
||
|
||
if (aTarget) {
|
||
RefPtr<SourceSurface> opt = aTarget->OptimizeSourceSurface(result.mSourceSurface);
|
||
if (opt) {
|
||
result.mSourceSurface = opt;
|
||
}
|
||
}
|
||
|
||
result.mCORSUsed = aElement->GetCORSMode() != CORS_NONE;
|
||
result.mHasSize = true;
|
||
result.mSize = size;
|
||
result.mPrincipal = principal.forget();
|
||
result.mIsWriteOnly = false;
|
||
|
||
return result;
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult
|
||
nsLayoutUtils::SurfaceFromElement(dom::Element* aElement,
|
||
uint32_t aSurfaceFlags,
|
||
DrawTarget* aTarget)
|
||
{
|
||
// If it's a <canvas>, we may be able to just grab its internal surface
|
||
if (HTMLCanvasElement* canvas =
|
||
HTMLCanvasElement::FromContentOrNull(aElement)) {
|
||
return SurfaceFromElement(canvas, aSurfaceFlags, aTarget);
|
||
}
|
||
|
||
// Maybe it's <video>?
|
||
if (HTMLVideoElement* video =
|
||
HTMLVideoElement::FromContentOrNull(aElement)) {
|
||
return SurfaceFromElement(video, aSurfaceFlags, aTarget);
|
||
}
|
||
|
||
// Finally, check if it's a normal image
|
||
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(aElement);
|
||
|
||
if (!imageLoader) {
|
||
return SurfaceFromElementResult();
|
||
}
|
||
|
||
return SurfaceFromElement(imageLoader, aSurfaceFlags, aTarget);
|
||
}
|
||
|
||
/* static */
|
||
nsIContent*
|
||
nsLayoutUtils::GetEditableRootContentByContentEditable(nsIDocument* aDocument)
|
||
{
|
||
// If the document is in designMode we should return nullptr.
|
||
if (!aDocument || aDocument->HasFlag(NODE_IS_EDITABLE)) {
|
||
return nullptr;
|
||
}
|
||
|
||
// contenteditable only works with HTML document.
|
||
// Note: Use nsIDOMHTMLDocument rather than nsIHTMLDocument for getting the
|
||
// body node because nsIDOMHTMLDocument::GetBody() does something
|
||
// additional work for some cases and nsEditor uses them.
|
||
nsCOMPtr<nsIDOMHTMLDocument> domHTMLDoc = do_QueryInterface(aDocument);
|
||
if (!domHTMLDoc) {
|
||
return nullptr;
|
||
}
|
||
|
||
Element* rootElement = aDocument->GetRootElement();
|
||
if (rootElement && rootElement->IsEditable()) {
|
||
return rootElement;
|
||
}
|
||
|
||
// If there are no editable root element, check its <body> element.
|
||
// Note that the body element could be <frameset> element.
|
||
nsCOMPtr<nsIDOMHTMLElement> body;
|
||
nsresult rv = domHTMLDoc->GetBody(getter_AddRefs(body));
|
||
nsCOMPtr<nsIContent> content = do_QueryInterface(body);
|
||
if (NS_SUCCEEDED(rv) && content && content->IsEditable()) {
|
||
return content;
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
/* static */ void
|
||
nsLayoutUtils::AssertNoDuplicateContinuations(nsIFrame* aContainer,
|
||
const nsFrameList& aFrameList)
|
||
{
|
||
for (nsIFrame* f = aFrameList.FirstChild(); f ; f = f->GetNextSibling()) {
|
||
// Check only later continuations of f; we deal with checking the
|
||
// earlier continuations when we hit those earlier continuations in
|
||
// the frame list.
|
||
for (nsIFrame *c = f; (c = c->GetNextInFlow());) {
|
||
NS_ASSERTION(c->GetParent() != aContainer ||
|
||
!aFrameList.ContainsFrame(c),
|
||
"Two continuations of the same frame in the same "
|
||
"frame list");
|
||
}
|
||
}
|
||
}
|
||
|
||
// Is one of aFrame's ancestors a letter frame?
|
||
static bool
|
||
IsInLetterFrame(nsIFrame *aFrame)
|
||
{
|
||
for (nsIFrame *f = aFrame->GetParent(); f; f = f->GetParent()) {
|
||
if (f->GetType() == nsGkAtoms::letterFrame) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(nsIFrame *aSubtreeRoot)
|
||
{
|
||
NS_ASSERTION(aSubtreeRoot->GetPrevInFlow(),
|
||
"frame tree not empty, but caller reported complete status");
|
||
|
||
// Also assert that text frames map no text.
|
||
int32_t start, end;
|
||
nsresult rv = aSubtreeRoot->GetOffsets(start, end);
|
||
NS_ASSERTION(NS_SUCCEEDED(rv), "GetOffsets failed");
|
||
// In some cases involving :first-letter, we'll partially unlink a
|
||
// continuation in the middle of a continuation chain from its
|
||
// previous and next continuations before destroying it, presumably so
|
||
// that we don't also destroy the later continuations. Once we've
|
||
// done this, GetOffsets returns incorrect values.
|
||
// For examples, see list of tests in
|
||
// https://bugzilla.mozilla.org/show_bug.cgi?id=619021#c29
|
||
NS_ASSERTION(start == end || IsInLetterFrame(aSubtreeRoot),
|
||
"frame tree not empty, but caller reported complete status");
|
||
|
||
nsIFrame::ChildListIterator lists(aSubtreeRoot);
|
||
for (; !lists.IsDone(); lists.Next()) {
|
||
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
||
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
||
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(childFrames.get());
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
|
||
static void
|
||
GetFontFacesForFramesInner(nsIFrame* aFrame, nsFontFaceList* aFontFaceList)
|
||
{
|
||
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
||
|
||
if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
||
if (!aFrame->GetPrevContinuation()) {
|
||
nsLayoutUtils::GetFontFacesForText(aFrame, 0, INT32_MAX, true,
|
||
aFontFaceList);
|
||
}
|
||
return;
|
||
}
|
||
|
||
nsIFrame::ChildListID childLists[] = { nsIFrame::kPrincipalList,
|
||
nsIFrame::kPopupList };
|
||
for (size_t i = 0; i < ArrayLength(childLists); ++i) {
|
||
nsFrameList children(aFrame->GetChildList(childLists[i]));
|
||
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
|
||
nsIFrame* child = e.get();
|
||
child = nsPlaceholderFrame::GetRealFrameFor(child);
|
||
GetFontFacesForFramesInner(child, aFontFaceList);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
nsresult
|
||
nsLayoutUtils::GetFontFacesForFrames(nsIFrame* aFrame,
|
||
nsFontFaceList* aFontFaceList)
|
||
{
|
||
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
||
|
||
while (aFrame) {
|
||
GetFontFacesForFramesInner(aFrame, aFontFaceList);
|
||
aFrame = GetNextContinuationOrIBSplitSibling(aFrame);
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
/* static */
|
||
nsresult
|
||
nsLayoutUtils::GetFontFacesForText(nsIFrame* aFrame,
|
||
int32_t aStartOffset, int32_t aEndOffset,
|
||
bool aFollowContinuations,
|
||
nsFontFaceList* aFontFaceList)
|
||
{
|
||
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
||
|
||
if (aFrame->GetType() != nsGkAtoms::textFrame) {
|
||
return NS_OK;
|
||
}
|
||
|
||
nsTextFrame* curr = static_cast<nsTextFrame*>(aFrame);
|
||
do {
|
||
int32_t fstart = std::max(curr->GetContentOffset(), aStartOffset);
|
||
int32_t fend = std::min(curr->GetContentEnd(), aEndOffset);
|
||
if (fstart >= fend) {
|
||
curr = static_cast<nsTextFrame*>(curr->GetNextContinuation());
|
||
continue;
|
||
}
|
||
|
||
// curr is overlapping with the offset we want
|
||
gfxSkipCharsIterator iter = curr->EnsureTextRun(nsTextFrame::eInflated);
|
||
gfxTextRun* textRun = curr->GetTextRun(nsTextFrame::eInflated);
|
||
NS_ENSURE_TRUE(textRun, NS_ERROR_OUT_OF_MEMORY);
|
||
|
||
// include continuations in the range that share the same textrun
|
||
nsTextFrame* next = nullptr;
|
||
if (aFollowContinuations && fend < aEndOffset) {
|
||
next = static_cast<nsTextFrame*>(curr->GetNextContinuation());
|
||
while (next && next->GetTextRun(nsTextFrame::eInflated) == textRun) {
|
||
fend = std::min(next->GetContentEnd(), aEndOffset);
|
||
next = fend < aEndOffset ?
|
||
static_cast<nsTextFrame*>(next->GetNextContinuation()) : nullptr;
|
||
}
|
||
}
|
||
|
||
uint32_t skipStart = iter.ConvertOriginalToSkipped(fstart);
|
||
uint32_t skipEnd = iter.ConvertOriginalToSkipped(fend);
|
||
aFontFaceList->AddFontsFromTextRun(textRun, skipStart, skipEnd - skipStart);
|
||
curr = next;
|
||
} while (aFollowContinuations && curr);
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
/* static */
|
||
size_t
|
||
nsLayoutUtils::SizeOfTextRunsForFrames(nsIFrame* aFrame,
|
||
MallocSizeOf aMallocSizeOf,
|
||
bool clear)
|
||
{
|
||
NS_PRECONDITION(aFrame, "NULL frame pointer");
|
||
|
||
size_t total = 0;
|
||
|
||
if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
||
nsTextFrame* textFrame = static_cast<nsTextFrame*>(aFrame);
|
||
for (uint32_t i = 0; i < 2; ++i) {
|
||
gfxTextRun *run = textFrame->GetTextRun(
|
||
(i != 0) ? nsTextFrame::eInflated : nsTextFrame::eNotInflated);
|
||
if (run) {
|
||
if (clear) {
|
||
run->ResetSizeOfAccountingFlags();
|
||
} else {
|
||
total += run->MaybeSizeOfIncludingThis(aMallocSizeOf);
|
||
}
|
||
}
|
||
}
|
||
return total;
|
||
}
|
||
|
||
nsAutoTArray<nsIFrame::ChildList,4> childListArray;
|
||
aFrame->GetChildLists(&childListArray);
|
||
|
||
for (nsIFrame::ChildListArrayIterator childLists(childListArray);
|
||
!childLists.IsDone(); childLists.Next()) {
|
||
for (nsFrameList::Enumerator e(childLists.CurrentList());
|
||
!e.AtEnd(); e.Next()) {
|
||
total += SizeOfTextRunsForFrames(e.get(), aMallocSizeOf, clear);
|
||
}
|
||
}
|
||
return total;
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::Initialize()
|
||
{
|
||
Preferences::AddUintVarCache(&sFontSizeInflationMaxRatio,
|
||
"font.size.inflation.maxRatio");
|
||
Preferences::AddUintVarCache(&sFontSizeInflationEmPerLine,
|
||
"font.size.inflation.emPerLine");
|
||
Preferences::AddUintVarCache(&sFontSizeInflationMinTwips,
|
||
"font.size.inflation.minTwips");
|
||
Preferences::AddUintVarCache(&sFontSizeInflationLineThreshold,
|
||
"font.size.inflation.lineThreshold");
|
||
Preferences::AddIntVarCache(&sFontSizeInflationMappingIntercept,
|
||
"font.size.inflation.mappingIntercept");
|
||
Preferences::AddBoolVarCache(&sFontSizeInflationForceEnabled,
|
||
"font.size.inflation.forceEnabled");
|
||
Preferences::AddBoolVarCache(&sFontSizeInflationDisabledInMasterProcess,
|
||
"font.size.inflation.disabledInMasterProcess");
|
||
Preferences::AddBoolVarCache(&sInvalidationDebuggingIsEnabled,
|
||
"nglayout.debug.invalidation");
|
||
Preferences::AddBoolVarCache(&sCSSVariablesEnabled,
|
||
"layout.css.variables.enabled");
|
||
Preferences::AddBoolVarCache(&sInterruptibleReflowEnabled,
|
||
"layout.interruptible-reflow.enabled");
|
||
Preferences::AddBoolVarCache(&sSVGTransformOriginEnabled,
|
||
"svg.transform-origin.enabled");
|
||
|
||
Preferences::RegisterCallback(GridEnabledPrefChangeCallback,
|
||
GRID_ENABLED_PREF_NAME);
|
||
GridEnabledPrefChangeCallback(GRID_ENABLED_PREF_NAME, nullptr);
|
||
Preferences::RegisterCallback(RubyEnabledPrefChangeCallback,
|
||
RUBY_ENABLED_PREF_NAME);
|
||
RubyEnabledPrefChangeCallback(RUBY_ENABLED_PREF_NAME, nullptr);
|
||
Preferences::RegisterCallback(StickyEnabledPrefChangeCallback,
|
||
STICKY_ENABLED_PREF_NAME);
|
||
StickyEnabledPrefChangeCallback(STICKY_ENABLED_PREF_NAME, nullptr);
|
||
Preferences::RegisterCallback(TextAlignTrueEnabledPrefChangeCallback,
|
||
TEXT_ALIGN_TRUE_ENABLED_PREF_NAME);
|
||
Preferences::RegisterCallback(DisplayContentsEnabledPrefChangeCallback,
|
||
DISPLAY_CONTENTS_ENABLED_PREF_NAME);
|
||
DisplayContentsEnabledPrefChangeCallback(DISPLAY_CONTENTS_ENABLED_PREF_NAME,
|
||
nullptr);
|
||
TextAlignTrueEnabledPrefChangeCallback(TEXT_ALIGN_TRUE_ENABLED_PREF_NAME,
|
||
nullptr);
|
||
|
||
nsComputedDOMStyle::RegisterPrefChangeCallbacks();
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::Shutdown()
|
||
{
|
||
if (sContentMap) {
|
||
delete sContentMap;
|
||
sContentMap = nullptr;
|
||
}
|
||
|
||
Preferences::UnregisterCallback(GridEnabledPrefChangeCallback,
|
||
GRID_ENABLED_PREF_NAME);
|
||
Preferences::UnregisterCallback(RubyEnabledPrefChangeCallback,
|
||
RUBY_ENABLED_PREF_NAME);
|
||
Preferences::UnregisterCallback(StickyEnabledPrefChangeCallback,
|
||
STICKY_ENABLED_PREF_NAME);
|
||
|
||
nsComputedDOMStyle::UnregisterPrefChangeCallbacks();
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::RegisterImageRequest(nsPresContext* aPresContext,
|
||
imgIRequest* aRequest,
|
||
bool* aRequestRegistered)
|
||
{
|
||
if (!aPresContext) {
|
||
return;
|
||
}
|
||
|
||
if (aRequestRegistered && *aRequestRegistered) {
|
||
// Our request is already registered with the refresh driver, so
|
||
// no need to register it again.
|
||
return;
|
||
}
|
||
|
||
if (aRequest) {
|
||
if (!aPresContext->RefreshDriver()->AddImageRequest(aRequest)) {
|
||
NS_WARNING("Unable to add image request");
|
||
return;
|
||
}
|
||
|
||
if (aRequestRegistered) {
|
||
*aRequestRegistered = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::RegisterImageRequestIfAnimated(nsPresContext* aPresContext,
|
||
imgIRequest* aRequest,
|
||
bool* aRequestRegistered)
|
||
{
|
||
if (!aPresContext) {
|
||
return;
|
||
}
|
||
|
||
if (aRequestRegistered && *aRequestRegistered) {
|
||
// Our request is already registered with the refresh driver, so
|
||
// no need to register it again.
|
||
return;
|
||
}
|
||
|
||
if (aRequest) {
|
||
nsCOMPtr<imgIContainer> image;
|
||
if (NS_SUCCEEDED(aRequest->GetImage(getter_AddRefs(image)))) {
|
||
// Check to verify that the image is animated. If so, then add it to the
|
||
// list of images tracked by the refresh driver.
|
||
bool isAnimated = false;
|
||
nsresult rv = image->GetAnimated(&isAnimated);
|
||
if (NS_SUCCEEDED(rv) && isAnimated) {
|
||
if (!aPresContext->RefreshDriver()->AddImageRequest(aRequest)) {
|
||
NS_WARNING("Unable to add image request");
|
||
return;
|
||
}
|
||
|
||
if (aRequestRegistered) {
|
||
*aRequestRegistered = true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::DeregisterImageRequest(nsPresContext* aPresContext,
|
||
imgIRequest* aRequest,
|
||
bool* aRequestRegistered)
|
||
{
|
||
if (!aPresContext) {
|
||
return;
|
||
}
|
||
|
||
// Deregister our imgIRequest with the refresh driver to
|
||
// complete tear-down, but only if it has been registered
|
||
if (aRequestRegistered && !*aRequestRegistered) {
|
||
return;
|
||
}
|
||
|
||
if (aRequest) {
|
||
nsCOMPtr<imgIContainer> image;
|
||
if (NS_SUCCEEDED(aRequest->GetImage(getter_AddRefs(image)))) {
|
||
aPresContext->RefreshDriver()->RemoveImageRequest(aRequest);
|
||
|
||
if (aRequestRegistered) {
|
||
*aRequestRegistered = false;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* static */
|
||
void
|
||
nsLayoutUtils::PostRestyleEvent(Element* aElement,
|
||
nsRestyleHint aRestyleHint,
|
||
nsChangeHint aMinChangeHint)
|
||
{
|
||
nsIDocument* doc = aElement->GetComposedDoc();
|
||
if (doc) {
|
||
nsCOMPtr<nsIPresShell> presShell = doc->GetShell();
|
||
if (presShell) {
|
||
presShell->GetPresContext()->RestyleManager()->PostRestyleEvent(
|
||
aElement, aRestyleHint, aMinChangeHint);
|
||
}
|
||
}
|
||
}
|
||
|
||
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
||
const nsAString& aValue)
|
||
: mContent(aContent),
|
||
mAttrName(aAttrName),
|
||
mValue(aValue)
|
||
{
|
||
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
||
}
|
||
|
||
nsSetAttrRunnable::nsSetAttrRunnable(nsIContent* aContent, nsIAtom* aAttrName,
|
||
int32_t aValue)
|
||
: mContent(aContent),
|
||
mAttrName(aAttrName)
|
||
{
|
||
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
||
mValue.AppendInt(aValue);
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsSetAttrRunnable::Run()
|
||
{
|
||
return mContent->SetAttr(kNameSpaceID_None, mAttrName, mValue, true);
|
||
}
|
||
|
||
nsUnsetAttrRunnable::nsUnsetAttrRunnable(nsIContent* aContent,
|
||
nsIAtom* aAttrName)
|
||
: mContent(aContent),
|
||
mAttrName(aAttrName)
|
||
{
|
||
NS_ASSERTION(aContent && aAttrName, "Missing stuff, prepare to crash");
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
nsUnsetAttrRunnable::Run()
|
||
{
|
||
return mContent->UnsetAttr(kNameSpaceID_None, mAttrName, true);
|
||
}
|
||
|
||
/**
|
||
* Compute the minimum font size inside of a container with the given
|
||
* width, such that **when the user zooms the container to fill the full
|
||
* width of the device**, the fonts satisfy our minima.
|
||
*/
|
||
static nscoord
|
||
MinimumFontSizeFor(nsPresContext* aPresContext, WritingMode aWritingMode,
|
||
nscoord aContainerISize)
|
||
{
|
||
nsIPresShell* presShell = aPresContext->PresShell();
|
||
|
||
uint32_t emPerLine = presShell->FontSizeInflationEmPerLine();
|
||
uint32_t minTwips = presShell->FontSizeInflationMinTwips();
|
||
if (emPerLine == 0 && minTwips == 0) {
|
||
return 0;
|
||
}
|
||
|
||
// Clamp the container width to the device dimensions
|
||
nscoord iFrameISize = aWritingMode.IsVertical()
|
||
? aPresContext->GetVisibleArea().height
|
||
: aPresContext->GetVisibleArea().width;
|
||
nscoord effectiveContainerISize = std::min(iFrameISize, aContainerISize);
|
||
|
||
nscoord byLine = 0, byInch = 0;
|
||
if (emPerLine != 0) {
|
||
byLine = effectiveContainerISize / emPerLine;
|
||
}
|
||
if (minTwips != 0) {
|
||
// REVIEW: Is this giving us app units and sizes *not* counting
|
||
// viewport scaling?
|
||
gfxSize screenSize = aPresContext->ScreenSizeInchesForFontInflation();
|
||
float deviceISizeInches = aWritingMode.IsVertical()
|
||
? screenSize.height : screenSize.width;
|
||
byInch = NSToCoordRound(effectiveContainerISize /
|
||
(deviceISizeInches * 1440 /
|
||
minTwips ));
|
||
}
|
||
return std::max(byLine, byInch);
|
||
}
|
||
|
||
/* static */ float
|
||
nsLayoutUtils::FontSizeInflationInner(const nsIFrame *aFrame,
|
||
nscoord aMinFontSize)
|
||
{
|
||
// Note that line heights should be inflated by the same ratio as the
|
||
// font size of the same text; thus we operate only on the font size
|
||
// even when we're scaling a line height.
|
||
nscoord styleFontSize = aFrame->StyleFont()->mFont.size;
|
||
if (styleFontSize <= 0) {
|
||
// Never scale zero font size.
|
||
return 1.0;
|
||
}
|
||
|
||
if (aMinFontSize <= 0) {
|
||
// No need to scale.
|
||
return 1.0;
|
||
}
|
||
|
||
// If between this current frame and its font inflation container there is a
|
||
// non-inline element with fixed width or height, then we should not inflate
|
||
// fonts for this frame.
|
||
for (const nsIFrame* f = aFrame;
|
||
f && !f->IsContainerForFontSizeInflation();
|
||
f = f->GetParent()) {
|
||
nsIContent* content = f->GetContent();
|
||
nsIAtom* fType = f->GetType();
|
||
nsIFrame* parent = f->GetParent();
|
||
// Also, if there is more than one frame corresponding to a single
|
||
// content node, we want the outermost one.
|
||
if (!(parent && parent->GetContent() == content) &&
|
||
// ignore width/height on inlines since they don't apply
|
||
fType != nsGkAtoms::inlineFrame &&
|
||
// ignore width on radios and checkboxes since we enlarge them and
|
||
// they have width/height in ua.css
|
||
fType != nsGkAtoms::formControlFrame) {
|
||
// ruby annotations should have the same inflation as its
|
||
// grandparent, which is the ruby frame contains the annotation.
|
||
if (fType == nsGkAtoms::rubyTextFrame) {
|
||
MOZ_ASSERT(parent &&
|
||
parent->GetType() == nsGkAtoms::rubyTextContainerFrame);
|
||
nsIFrame* grandparent = parent->GetParent();
|
||
MOZ_ASSERT(grandparent &&
|
||
grandparent->GetType() == nsGkAtoms::rubyFrame);
|
||
return FontSizeInflationFor(grandparent);
|
||
}
|
||
nsStyleCoord stylePosWidth = f->StylePosition()->mWidth;
|
||
nsStyleCoord stylePosHeight = f->StylePosition()->mHeight;
|
||
if (stylePosWidth.GetUnit() != eStyleUnit_Auto ||
|
||
stylePosHeight.GetUnit() != eStyleUnit_Auto) {
|
||
|
||
return 1.0;
|
||
}
|
||
}
|
||
}
|
||
|
||
int32_t interceptParam = nsLayoutUtils::FontSizeInflationMappingIntercept();
|
||
float maxRatio = (float)nsLayoutUtils::FontSizeInflationMaxRatio() / 100.0f;
|
||
|
||
float ratio = float(styleFontSize) / float(aMinFontSize);
|
||
float inflationRatio;
|
||
|
||
// Given a minimum inflated font size m, a specified font size s, we want to
|
||
// find the inflated font size i and then return the ratio of i to s (i/s).
|
||
if (interceptParam >= 0) {
|
||
// Since the mapping intercept parameter P is greater than zero, we use it
|
||
// to determine the point where our mapping function intersects the i=s
|
||
// line. This means that we have an equation of the form:
|
||
//
|
||
// i = m + s·(P/2)/(1 + P/2), if s <= (1 + P/2)·m
|
||
// i = s, if s >= (1 + P/2)·m
|
||
|
||
float intercept = 1 + float(interceptParam)/2.0f;
|
||
if (ratio >= intercept) {
|
||
// If we're already at 1+P/2 or more times the minimum, don't scale.
|
||
return 1.0;
|
||
}
|
||
|
||
// The point (intercept, intercept) is where the part of the i vs. s graph
|
||
// that's not slope 1 meets the i=s line. (This part of the
|
||
// graph is a line from (0, m), to that point). We calculate the
|
||
// intersection point to be ((1+P/2)m, (1+P/2)m), where P is the
|
||
// intercept parameter above. We then need to return i/s.
|
||
inflationRatio = (1.0f + (ratio * (intercept - 1) / intercept)) / ratio;
|
||
} else {
|
||
// This is the case where P is negative. We essentially want to implement
|
||
// the case for P=infinity here, so we make i = s + m, which means that
|
||
// i/s = s/s + m/s = 1 + 1/ratio
|
||
inflationRatio = 1 + 1.0f / ratio;
|
||
}
|
||
|
||
if (maxRatio > 1.0 && inflationRatio > maxRatio) {
|
||
return maxRatio;
|
||
} else {
|
||
return inflationRatio;
|
||
}
|
||
}
|
||
|
||
static bool
|
||
ShouldInflateFontsForContainer(const nsIFrame *aFrame)
|
||
{
|
||
// We only want to inflate fonts for text that is in a place
|
||
// with room to expand. The question is what the best heuristic for
|
||
// that is...
|
||
// For now, we're going to use NS_FRAME_IN_CONSTRAINED_BSIZE, which
|
||
// indicates whether the frame is inside something with a constrained
|
||
// block-size (propagating down the tree), but the propagation stops when
|
||
// we hit overflow-y [or -x, for vertical mode]: scroll or auto.
|
||
const nsStyleText* styleText = aFrame->StyleText();
|
||
|
||
return styleText->mTextSizeAdjust != NS_STYLE_TEXT_SIZE_ADJUST_NONE &&
|
||
!(aFrame->GetStateBits() & NS_FRAME_IN_CONSTRAINED_BSIZE) &&
|
||
// We also want to disable font inflation for containers that have
|
||
// preformatted text.
|
||
// MathML cells need special treatment. See bug 1002526 comment 56.
|
||
(styleText->WhiteSpaceCanWrap(aFrame) ||
|
||
aFrame->IsFrameOfType(nsIFrame::eMathML));
|
||
}
|
||
|
||
nscoord
|
||
nsLayoutUtils::InflationMinFontSizeFor(const nsIFrame *aFrame)
|
||
{
|
||
nsPresContext *presContext = aFrame->PresContext();
|
||
if (!FontSizeInflationEnabled(presContext) ||
|
||
presContext->mInflationDisabledForShrinkWrap) {
|
||
return 0;
|
||
}
|
||
|
||
for (const nsIFrame *f = aFrame; f; f = f->GetParent()) {
|
||
if (f->IsContainerForFontSizeInflation()) {
|
||
if (!ShouldInflateFontsForContainer(f)) {
|
||
return 0;
|
||
}
|
||
|
||
nsFontInflationData *data =
|
||
nsFontInflationData::FindFontInflationDataFor(aFrame);
|
||
// FIXME: The need to null-check here is sort of a bug, and might
|
||
// lead to incorrect results.
|
||
if (!data || !data->InflationEnabled()) {
|
||
return 0;
|
||
}
|
||
|
||
return MinimumFontSizeFor(aFrame->PresContext(),
|
||
aFrame->GetWritingMode(),
|
||
data->EffectiveISize());
|
||
}
|
||
}
|
||
|
||
MOZ_ASSERT(false, "root should always be container");
|
||
|
||
return 0;
|
||
}
|
||
|
||
float
|
||
nsLayoutUtils::FontSizeInflationFor(const nsIFrame *aFrame)
|
||
{
|
||
if (aFrame->IsSVGText()) {
|
||
const nsIFrame* container = aFrame;
|
||
while (container->GetType() != nsGkAtoms::svgTextFrame) {
|
||
container = container->GetParent();
|
||
}
|
||
NS_ASSERTION(container, "expected to find an ancestor SVGTextFrame");
|
||
return
|
||
static_cast<const SVGTextFrame*>(container)->GetFontSizeScaleFactor();
|
||
}
|
||
|
||
if (!FontSizeInflationEnabled(aFrame->PresContext())) {
|
||
return 1.0f;
|
||
}
|
||
|
||
return FontSizeInflationInner(aFrame, InflationMinFontSizeFor(aFrame));
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::FontSizeInflationEnabled(nsPresContext *aPresContext)
|
||
{
|
||
nsIPresShell* presShell = aPresContext->GetPresShell();
|
||
|
||
if (!presShell) {
|
||
return false;
|
||
}
|
||
|
||
return presShell->FontSizeInflationEnabled();
|
||
}
|
||
|
||
/* static */ nsRect
|
||
nsLayoutUtils::GetBoxShadowRectForFrame(nsIFrame* aFrame,
|
||
const nsSize& aFrameSize)
|
||
{
|
||
nsCSSShadowArray* boxShadows = aFrame->StyleBorder()->mBoxShadow;
|
||
if (!boxShadows) {
|
||
return nsRect();
|
||
}
|
||
|
||
bool nativeTheme;
|
||
const nsStyleDisplay* styleDisplay = aFrame->StyleDisplay();
|
||
nsITheme::Transparency transparency;
|
||
if (aFrame->IsThemed(styleDisplay, &transparency)) {
|
||
// For opaque (rectangular) theme widgets we can take the generic
|
||
// border-box path with border-radius disabled.
|
||
nativeTheme = transparency != nsITheme::eOpaque;
|
||
} else {
|
||
nativeTheme = false;
|
||
}
|
||
|
||
nsRect frameRect = nativeTheme ?
|
||
aFrame->GetVisualOverflowRectRelativeToSelf() :
|
||
nsRect(nsPoint(0, 0), aFrameSize);
|
||
|
||
nsRect shadows;
|
||
int32_t A2D = aFrame->PresContext()->AppUnitsPerDevPixel();
|
||
for (uint32_t i = 0; i < boxShadows->Length(); ++i) {
|
||
nsRect tmpRect = frameRect;
|
||
nsCSSShadowItem* shadow = boxShadows->ShadowAt(i);
|
||
|
||
// inset shadows are never painted outside the frame
|
||
if (shadow->mInset)
|
||
continue;
|
||
|
||
tmpRect.MoveBy(nsPoint(shadow->mXOffset, shadow->mYOffset));
|
||
tmpRect.Inflate(shadow->mSpread);
|
||
tmpRect.Inflate(
|
||
nsContextBoxBlur::GetBlurRadiusMargin(shadow->mRadius, A2D));
|
||
shadows.UnionRect(shadows, tmpRect);
|
||
}
|
||
return shadows;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::UpdateImageVisibilityForFrame(nsIFrame* aImageFrame)
|
||
{
|
||
#ifdef DEBUG
|
||
nsIAtom* type = aImageFrame->GetType();
|
||
MOZ_ASSERT(type == nsGkAtoms::imageFrame ||
|
||
type == nsGkAtoms::imageControlFrame ||
|
||
type == nsGkAtoms::svgImageFrame, "wrong type of frame");
|
||
#endif
|
||
|
||
nsCOMPtr<nsIImageLoadingContent> content = do_QueryInterface(aImageFrame->GetContent());
|
||
if (!content) {
|
||
return;
|
||
}
|
||
|
||
nsIPresShell* presShell = aImageFrame->PresContext()->PresShell();
|
||
if (presShell->AssumeAllImagesVisible()) {
|
||
presShell->EnsureImageInVisibleList(content);
|
||
return;
|
||
}
|
||
|
||
bool visible = true;
|
||
nsIFrame* f = aImageFrame->GetParent();
|
||
nsRect rect = aImageFrame->GetContentRectRelativeToSelf();
|
||
nsIFrame* rectFrame = aImageFrame;
|
||
while (f) {
|
||
nsIScrollableFrame* sf = do_QueryFrame(f);
|
||
if (sf) {
|
||
nsRect transformedRect =
|
||
nsLayoutUtils::TransformFrameRectToAncestor(rectFrame, rect, f);
|
||
if (!sf->IsRectNearlyVisible(transformedRect)) {
|
||
visible = false;
|
||
break;
|
||
}
|
||
// Move transformedRect to be contained in the scrollport as best we can
|
||
// (it might not fit) to pretend that it was scrolled into view.
|
||
nsRect scrollPort = sf->GetScrollPortRect();
|
||
if (transformedRect.XMost() > scrollPort.XMost()) {
|
||
transformedRect.x -= transformedRect.XMost() - scrollPort.XMost();
|
||
}
|
||
if (transformedRect.x < scrollPort.x) {
|
||
transformedRect.x = scrollPort.x;
|
||
}
|
||
if (transformedRect.YMost() > scrollPort.YMost()) {
|
||
transformedRect.y -= transformedRect.YMost() - scrollPort.YMost();
|
||
}
|
||
if (transformedRect.y < scrollPort.y) {
|
||
transformedRect.y = scrollPort.y;
|
||
}
|
||
transformedRect.width = std::min(transformedRect.width, scrollPort.width);
|
||
transformedRect.height = std::min(transformedRect.height, scrollPort.height);
|
||
rect = transformedRect;
|
||
rectFrame = f;
|
||
}
|
||
nsIFrame* parent = f->GetParent();
|
||
if (!parent) {
|
||
parent = nsLayoutUtils::GetCrossDocParentFrame(f);
|
||
if (parent && parent->PresContext()->IsChrome()) {
|
||
break;
|
||
}
|
||
}
|
||
f = parent;
|
||
}
|
||
|
||
if (visible) {
|
||
presShell->EnsureImageInVisibleList(content);
|
||
} else {
|
||
presShell->RemoveImageFromVisibleList(content);
|
||
}
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::GetContentViewerSize(nsPresContext* aPresContext,
|
||
LayoutDeviceIntSize& aOutSize)
|
||
{
|
||
nsCOMPtr<nsIDocShell> docShell = aPresContext->GetDocShell();
|
||
if (!docShell) {
|
||
return false;
|
||
}
|
||
|
||
nsCOMPtr<nsIContentViewer> cv;
|
||
docShell->GetContentViewer(getter_AddRefs(cv));
|
||
if (!cv) {
|
||
return false;
|
||
}
|
||
|
||
nsIntRect bounds;
|
||
cv->GetBounds(bounds);
|
||
aOutSize = LayoutDeviceIntRect::FromUntyped(bounds).Size();
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
UpdateCompositionBoundsForRCDRSF(ParentLayerRect& aCompBounds,
|
||
nsPresContext* aPresContext,
|
||
const nsRect& aFrameBounds,
|
||
bool aScaleContentViewerSize,
|
||
const LayoutDeviceToLayerScale2D& aCumulativeResolution)
|
||
{
|
||
nsIFrame* rootFrame = aPresContext->PresShell()->GetRootFrame();
|
||
if (!rootFrame) {
|
||
return false;
|
||
}
|
||
|
||
// On Android, we need to do things a bit differently to get things
|
||
// right (see bug 983208, bug 988882). We use the bounds of the nearest
|
||
// widget, but clamp the height to the frame bounds height. This clamping
|
||
// is done to get correct results for a page where the page is sized to
|
||
// the screen and thus the dynamic toolbar never disappears. In such a
|
||
// case, we want the composition bounds to exclude the toolbar height,
|
||
// but the widget bounds includes it. We don't currently have a good way
|
||
// of knowing about the toolbar height, but clamping to the frame bounds
|
||
// height gives the correct answer in the cases we care about.
|
||
#ifdef MOZ_WIDGET_ANDROID
|
||
nsIWidget* widget = rootFrame->GetNearestWidget();
|
||
#else
|
||
nsView* view = rootFrame->GetView();
|
||
nsIWidget* widget = view ? view->GetWidget() : nullptr;
|
||
#endif
|
||
|
||
if (widget) {
|
||
nsIntRect widgetBounds;
|
||
widget->GetBounds(widgetBounds);
|
||
widgetBounds.MoveTo(0, 0);
|
||
aCompBounds = ParentLayerRect(ViewAs<ParentLayerPixel>(widgetBounds));
|
||
#ifdef MOZ_WIDGET_ANDROID
|
||
ParentLayerRect frameBounds =
|
||
LayoutDeviceRect::FromAppUnits(aFrameBounds, aPresContext->AppUnitsPerDevPixel())
|
||
* aCumulativeResolution
|
||
* LayerToParentLayerScale(1.0);
|
||
if (frameBounds.height < aCompBounds.height) {
|
||
aCompBounds.height = frameBounds.height;
|
||
}
|
||
#endif
|
||
return true;
|
||
}
|
||
|
||
LayoutDeviceIntSize contentSize;
|
||
if (nsLayoutUtils::GetContentViewerSize(aPresContext, contentSize)) {
|
||
LayoutDeviceToParentLayerScale scale;
|
||
if (aScaleContentViewerSize && aPresContext->GetParentPresContext()) {
|
||
scale = LayoutDeviceToParentLayerScale(
|
||
aPresContext->GetParentPresContext()->PresShell()->GetCumulativeResolution());
|
||
}
|
||
aCompBounds.SizeTo(contentSize * scale);
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* static */ nsMargin
|
||
nsLayoutUtils::ScrollbarAreaToExcludeFromCompositionBoundsFor(nsIFrame* aScrollFrame)
|
||
{
|
||
if (!aScrollFrame || !aScrollFrame->GetScrollTargetFrame()) {
|
||
return nsMargin();
|
||
}
|
||
nsPresContext* presContext = aScrollFrame->PresContext();
|
||
nsIPresShell* presShell = presContext->GetPresShell();
|
||
if (!presShell) {
|
||
return nsMargin();
|
||
}
|
||
bool isRootScrollFrame = aScrollFrame == presShell->GetRootScrollFrame();
|
||
bool isRootContentDocRootScrollFrame = isRootScrollFrame
|
||
&& presContext->IsRootContentDocument();
|
||
if (!isRootContentDocRootScrollFrame) {
|
||
return nsMargin();
|
||
}
|
||
if (LookAndFeel::GetInt(LookAndFeel::eIntID_UseOverlayScrollbars)) {
|
||
return nsMargin();
|
||
}
|
||
nsIScrollableFrame* scrollableFrame = aScrollFrame->GetScrollTargetFrame();
|
||
if (!scrollableFrame) {
|
||
return nsMargin();
|
||
}
|
||
return scrollableFrame->GetActualScrollbarSizes();
|
||
}
|
||
|
||
/* static */ nsSize
|
||
nsLayoutUtils::CalculateCompositionSizeForFrame(nsIFrame* aFrame, bool aSubtractScrollbars)
|
||
{
|
||
// If we have a scrollable frame, restrict the composition bounds to its
|
||
// scroll port. The scroll port excludes the frame borders and the scroll
|
||
// bars, which we don't want to be part of the composition bounds.
|
||
nsIScrollableFrame* scrollableFrame = aFrame->GetScrollTargetFrame();
|
||
nsRect rect = scrollableFrame ? scrollableFrame->GetScrollPortRect() : aFrame->GetRect();
|
||
nsSize size = rect.Size();
|
||
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
nsIPresShell* presShell = presContext->PresShell();
|
||
|
||
bool isRootContentDocRootScrollFrame = presContext->IsRootContentDocument()
|
||
&& aFrame == presShell->GetRootScrollFrame();
|
||
if (isRootContentDocRootScrollFrame) {
|
||
ParentLayerRect compBounds;
|
||
LayoutDeviceToLayerScale2D cumulativeResolution(
|
||
presShell->GetCumulativeResolution()
|
||
* nsLayoutUtils::GetTransformToAncestorScale(aFrame));
|
||
if (UpdateCompositionBoundsForRCDRSF(compBounds, presContext, rect,
|
||
false, cumulativeResolution)) {
|
||
int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel();
|
||
size = nsSize(compBounds.width * auPerDevPixel, compBounds.height * auPerDevPixel);
|
||
}
|
||
}
|
||
|
||
if (aSubtractScrollbars) {
|
||
nsMargin margins = ScrollbarAreaToExcludeFromCompositionBoundsFor(aFrame);
|
||
size.width -= margins.LeftRight();
|
||
size.height -= margins.TopBottom();
|
||
}
|
||
|
||
return size;
|
||
}
|
||
|
||
/* static */ CSSSize
|
||
nsLayoutUtils::CalculateRootCompositionSize(nsIFrame* aFrame,
|
||
bool aIsRootContentDocRootScrollFrame,
|
||
const FrameMetrics& aMetrics)
|
||
{
|
||
|
||
if (aIsRootContentDocRootScrollFrame) {
|
||
return ViewAs<LayerPixel>(aMetrics.GetCompositionBounds().Size(),
|
||
PixelCastJustification::ParentLayerToLayerForRootComposition)
|
||
* LayerToScreenScale(1.0f)
|
||
/ aMetrics.DisplayportPixelsPerCSSPixel();
|
||
}
|
||
nsPresContext* presContext = aFrame->PresContext();
|
||
ScreenSize rootCompositionSize;
|
||
nsPresContext* rootPresContext =
|
||
presContext->GetToplevelContentDocumentPresContext();
|
||
if (!rootPresContext) {
|
||
rootPresContext = presContext->GetRootPresContext();
|
||
}
|
||
nsIPresShell* rootPresShell = nullptr;
|
||
if (rootPresContext) {
|
||
rootPresShell = rootPresContext->PresShell();
|
||
if (nsIFrame* rootFrame = rootPresShell->GetRootFrame()) {
|
||
LayoutDeviceToLayerScale2D cumulativeResolution(
|
||
rootPresShell->GetCumulativeResolution()
|
||
* nsLayoutUtils::GetTransformToAncestorScale(rootFrame));
|
||
ParentLayerRect compBounds;
|
||
if (UpdateCompositionBoundsForRCDRSF(compBounds, rootPresContext,
|
||
rootFrame->GetRect(), true, cumulativeResolution)) {
|
||
rootCompositionSize = ViewAs<ScreenPixel>(compBounds.Size(),
|
||
PixelCastJustification::ScreenIsParentLayerForRoot);
|
||
} else {
|
||
int32_t rootAUPerDevPixel = rootPresContext->AppUnitsPerDevPixel();
|
||
LayerSize frameSize =
|
||
(LayoutDeviceRect::FromAppUnits(rootFrame->GetRect(), rootAUPerDevPixel)
|
||
* cumulativeResolution).Size();
|
||
rootCompositionSize = frameSize * LayerToScreenScale(1.0f);
|
||
}
|
||
}
|
||
} else {
|
||
nsIWidget* widget = aFrame->GetNearestWidget();
|
||
nsIntRect widgetBounds;
|
||
widget->GetBounds(widgetBounds);
|
||
rootCompositionSize = ScreenSize(ViewAs<ScreenPixel>(widgetBounds.Size()));
|
||
}
|
||
|
||
// Adjust composition size for the size of scroll bars.
|
||
nsIFrame* rootRootScrollFrame = rootPresShell ? rootPresShell->GetRootScrollFrame() : nullptr;
|
||
nsMargin scrollbarMargins = ScrollbarAreaToExcludeFromCompositionBoundsFor(rootRootScrollFrame);
|
||
CSSMargin margins = CSSMargin::FromAppUnits(scrollbarMargins);
|
||
// Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
|
||
rootCompositionSize.width -= margins.LeftRight();
|
||
rootCompositionSize.height -= margins.TopBottom();
|
||
|
||
return rootCompositionSize / aMetrics.DisplayportPixelsPerCSSPixel();
|
||
}
|
||
|
||
/* static */ nsRect
|
||
nsLayoutUtils::CalculateScrollableRectForFrame(nsIScrollableFrame* aScrollableFrame, nsIFrame* aRootFrame)
|
||
{
|
||
nsRect contentBounds;
|
||
if (aScrollableFrame) {
|
||
contentBounds = aScrollableFrame->GetScrollRange();
|
||
|
||
// We ifndef the below code for Fennec because it requires special behaviour
|
||
// on the APZC side. Because Fennec has it's own PZC implementation which doesn't
|
||
// provide the special behaviour, this code will cause it to break. We can remove
|
||
// the ifndef once Fennec switches over to APZ or if we add the special handling
|
||
// to Fennec
|
||
#if !defined(MOZ_WIDGET_ANDROID) || defined(MOZ_ANDROID_APZ)
|
||
nsPoint scrollPosition = aScrollableFrame->GetScrollPosition();
|
||
if (aScrollableFrame->GetScrollbarStyles().mVertical == NS_STYLE_OVERFLOW_HIDDEN) {
|
||
contentBounds.y = scrollPosition.y;
|
||
contentBounds.height = 0;
|
||
}
|
||
if (aScrollableFrame->GetScrollbarStyles().mHorizontal == NS_STYLE_OVERFLOW_HIDDEN) {
|
||
contentBounds.x = scrollPosition.x;
|
||
contentBounds.width = 0;
|
||
}
|
||
#endif
|
||
|
||
contentBounds.width += aScrollableFrame->GetScrollPortRect().width;
|
||
contentBounds.height += aScrollableFrame->GetScrollPortRect().height;
|
||
} else {
|
||
contentBounds = aRootFrame->GetRect();
|
||
}
|
||
return contentBounds;
|
||
}
|
||
|
||
/* static */ nsRect
|
||
nsLayoutUtils::CalculateExpandedScrollableRect(nsIFrame* aFrame)
|
||
{
|
||
nsRect scrollableRect =
|
||
CalculateScrollableRectForFrame(aFrame->GetScrollTargetFrame(),
|
||
aFrame->PresContext()->PresShell()->GetRootFrame());
|
||
nsSize compSize = CalculateCompositionSizeForFrame(aFrame);
|
||
|
||
if (aFrame == aFrame->PresContext()->PresShell()->GetRootScrollFrame()) {
|
||
// the composition size for the root scroll frame does not include the
|
||
// local resolution, so we adjust.
|
||
float res = aFrame->PresContext()->PresShell()->GetResolution();
|
||
compSize.width = NSToCoordRound(compSize.width / res);
|
||
compSize.height = NSToCoordRound(compSize.height / res);
|
||
}
|
||
|
||
if (scrollableRect.width < compSize.width) {
|
||
scrollableRect.x = std::max(0,
|
||
scrollableRect.x - (compSize.width - scrollableRect.width));
|
||
scrollableRect.width = compSize.width;
|
||
}
|
||
|
||
if (scrollableRect.height < compSize.height) {
|
||
scrollableRect.y = std::max(0,
|
||
scrollableRect.y - (compSize.height - scrollableRect.height));
|
||
scrollableRect.height = compSize.height;
|
||
}
|
||
return scrollableRect;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::DoLogTestDataForPaint(LayerManager* aManager,
|
||
ViewID aScrollId,
|
||
const std::string& aKey,
|
||
const std::string& aValue)
|
||
{
|
||
if (aManager->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
|
||
static_cast<ClientLayerManager*>(aManager)->LogTestDataForCurrentPaint(aScrollId, aKey, aValue);
|
||
}
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::IsAPZTestLoggingEnabled()
|
||
{
|
||
return gfxPrefs::APZTestLoggingEnabled();
|
||
}
|
||
|
||
nsLayoutUtils::SurfaceFromElementResult::SurfaceFromElementResult()
|
||
// Use safe default values here
|
||
: mIsWriteOnly(true)
|
||
, mIsStillLoading(false)
|
||
, mHasSize(false)
|
||
, mCORSUsed(false)
|
||
, mIsPremultiplied(true)
|
||
{
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::IsNonWrapperBlock(nsIFrame* aFrame)
|
||
{
|
||
return GetAsBlock(aFrame) && !aFrame->IsBlockWrapper();
|
||
}
|
||
|
||
bool
|
||
nsLayoutUtils::NeedsPrintPreviewBackground(nsPresContext* aPresContext)
|
||
{
|
||
return aPresContext->IsRootPaginatedDocument() &&
|
||
(aPresContext->Type() == nsPresContext::eContext_PrintPreview ||
|
||
aPresContext->Type() == nsPresContext::eContext_PageLayout);
|
||
}
|
||
|
||
AutoMaybeDisableFontInflation::AutoMaybeDisableFontInflation(nsIFrame *aFrame)
|
||
{
|
||
// FIXME: Now that inflation calculations are based on the flow
|
||
// root's NCA's (nearest common ancestor of its inflatable
|
||
// descendants) width, we could probably disable inflation in
|
||
// fewer cases than we currently do.
|
||
// MathML cells need special treatment. See bug 1002526 comment 56.
|
||
if (aFrame->IsContainerForFontSizeInflation() &&
|
||
!aFrame->IsFrameOfType(nsIFrame::eMathML)) {
|
||
mPresContext = aFrame->PresContext();
|
||
mOldValue = mPresContext->mInflationDisabledForShrinkWrap;
|
||
mPresContext->mInflationDisabledForShrinkWrap = true;
|
||
} else {
|
||
// indicate we have nothing to restore
|
||
mPresContext = nullptr;
|
||
}
|
||
}
|
||
|
||
AutoMaybeDisableFontInflation::~AutoMaybeDisableFontInflation()
|
||
{
|
||
if (mPresContext) {
|
||
mPresContext->mInflationDisabledForShrinkWrap = mOldValue;
|
||
}
|
||
}
|
||
|
||
namespace mozilla {
|
||
|
||
Rect NSRectToRect(const nsRect& aRect, double aAppUnitsPerPixel)
|
||
{
|
||
// Note that by making aAppUnitsPerPixel a double we're doing floating-point
|
||
// division using a larger type and avoiding rounding error.
|
||
return Rect(Float(aRect.x / aAppUnitsPerPixel),
|
||
Float(aRect.y / aAppUnitsPerPixel),
|
||
Float(aRect.width / aAppUnitsPerPixel),
|
||
Float(aRect.height / aAppUnitsPerPixel));
|
||
}
|
||
|
||
Rect NSRectToSnappedRect(const nsRect& aRect, double aAppUnitsPerPixel,
|
||
const gfx::DrawTarget& aSnapDT)
|
||
{
|
||
// Note that by making aAppUnitsPerPixel a double we're doing floating-point
|
||
// division using a larger type and avoiding rounding error.
|
||
Rect rect(Float(aRect.x / aAppUnitsPerPixel),
|
||
Float(aRect.y / aAppUnitsPerPixel),
|
||
Float(aRect.width / aAppUnitsPerPixel),
|
||
Float(aRect.height / aAppUnitsPerPixel));
|
||
MaybeSnapToDevicePixels(rect, aSnapDT, true);
|
||
return rect;
|
||
}
|
||
|
||
void StrokeLineWithSnapping(const nsPoint& aP1, const nsPoint& aP2,
|
||
int32_t aAppUnitsPerDevPixel,
|
||
DrawTarget& aDrawTarget,
|
||
const Pattern& aPattern,
|
||
const StrokeOptions& aStrokeOptions,
|
||
const DrawOptions& aDrawOptions)
|
||
{
|
||
Point p1 = NSPointToPoint(aP1, aAppUnitsPerDevPixel);
|
||
Point p2 = NSPointToPoint(aP2, aAppUnitsPerDevPixel);
|
||
SnapLineToDevicePixelsForStroking(p1, p2, aDrawTarget);
|
||
aDrawTarget.StrokeLine(p1, p2, aPattern, aStrokeOptions, aDrawOptions);
|
||
}
|
||
|
||
namespace layout {
|
||
|
||
|
||
void
|
||
MaybeSetupTransactionIdAllocator(layers::LayerManager* aManager, nsView* aView)
|
||
{
|
||
if (aManager->GetBackendType() == layers::LayersBackend::LAYERS_CLIENT) {
|
||
layers::ClientLayerManager *manager = static_cast<layers::ClientLayerManager*>(aManager);
|
||
nsRefreshDriver *refresh = aView->GetViewManager()->GetPresShell()->GetPresContext()->RefreshDriver();
|
||
manager->SetTransactionIdAllocator(refresh);
|
||
}
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::IsOutlineStyleAutoEnabled()
|
||
{
|
||
static bool sOutlineStyleAutoEnabled;
|
||
static bool sOutlineStyleAutoPrefCached = false;
|
||
|
||
if (!sOutlineStyleAutoPrefCached) {
|
||
sOutlineStyleAutoPrefCached = true;
|
||
Preferences::AddBoolVarCache(&sOutlineStyleAutoEnabled,
|
||
"layout.css.outline-style-auto.enabled",
|
||
false);
|
||
}
|
||
return sOutlineStyleAutoEnabled;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetBSizeFromFontMetrics(const nsIFrame* aFrame,
|
||
nsHTMLReflowMetrics& aMetrics,
|
||
const LogicalMargin& aFramePadding,
|
||
WritingMode aLineWM,
|
||
WritingMode aFrameWM)
|
||
{
|
||
nsRefPtr<nsFontMetrics> fm;
|
||
float inflation = nsLayoutUtils::FontSizeInflationFor(aFrame);
|
||
nsLayoutUtils::GetFontMetricsForFrame(aFrame, getter_AddRefs(fm), inflation);
|
||
|
||
if (fm) {
|
||
// Compute final height of the frame.
|
||
//
|
||
// Do things the standard css2 way -- though it's hard to find it
|
||
// in the css2 spec! It's actually found in the css1 spec section
|
||
// 4.4 (you will have to read between the lines to really see
|
||
// it).
|
||
//
|
||
// The height of our box is the sum of our font size plus the top
|
||
// and bottom border and padding. The height of children do not
|
||
// affect our height.
|
||
aMetrics.SetBlockStartAscent(aLineWM.IsLineInverted() ? fm->MaxDescent()
|
||
: fm->MaxAscent());
|
||
aMetrics.BSize(aLineWM) = fm->MaxHeight();
|
||
} else {
|
||
NS_WARNING("Cannot get font metrics - defaulting sizes to 0");
|
||
aMetrics.SetBlockStartAscent(aMetrics.BSize(aLineWM) = 0);
|
||
}
|
||
aMetrics.SetBlockStartAscent(aMetrics.BlockStartAscent() +
|
||
aFramePadding.BStart(aFrameWM));
|
||
aMetrics.BSize(aLineWM) += aFramePadding.BStartEnd(aFrameWM);
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::HasApzAwareListeners(EventListenerManager* aElm)
|
||
{
|
||
if (!aElm) {
|
||
return false;
|
||
}
|
||
return aElm->HasListenersFor(nsGkAtoms::ontouchstart) ||
|
||
aElm->HasListenersFor(nsGkAtoms::ontouchmove) ||
|
||
aElm->HasListenersFor(nsGkAtoms::onwheel) ||
|
||
aElm->HasListenersFor(nsGkAtoms::onDOMMouseScroll) ||
|
||
aElm->HasListenersFor(nsHtml5Atoms::onmousewheel);
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(nsIPresShell* aShell)
|
||
{
|
||
if (nsIDocument* doc = aShell->GetDocument()) {
|
||
WidgetEvent event(true, NS_EVENT_NULL);
|
||
nsTArray<EventTarget*> targets;
|
||
nsresult rv = EventDispatcher::Dispatch(doc, nullptr, &event, nullptr,
|
||
nullptr, nullptr, &targets);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
for (size_t i = 0; i < targets.Length(); i++) {
|
||
if (HasApzAwareListeners(targets[i]->GetExistingListenerManager())) {
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */ float
|
||
nsLayoutUtils::GetResolution(nsIPresShell* aPresShell)
|
||
{
|
||
nsIScrollableFrame* sf = aPresShell->GetRootScrollFrameAsScrollable();
|
||
if (sf) {
|
||
return sf->GetResolution();
|
||
}
|
||
return aPresShell->GetResolution();
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetResolutionAndScaleTo(nsIPresShell* aPresShell, float aResolution)
|
||
{
|
||
nsIScrollableFrame* sf = aPresShell->GetRootScrollFrameAsScrollable();
|
||
if (sf) {
|
||
sf->SetResolutionAndScaleTo(aResolution);
|
||
aPresShell->SetResolutionAndScaleTo(aResolution);
|
||
}
|
||
}
|
||
|
||
static void
|
||
MaybeReflowForInflationScreenSizeChange(nsPresContext *aPresContext)
|
||
{
|
||
if (aPresContext) {
|
||
nsIPresShell* presShell = aPresContext->GetPresShell();
|
||
bool fontInflationWasEnabled = presShell->FontSizeInflationEnabled();
|
||
presShell->NotifyFontSizeInflationEnabledIsDirty();
|
||
bool changed = false;
|
||
if (presShell && presShell->FontSizeInflationEnabled() &&
|
||
presShell->FontSizeInflationMinTwips() != 0) {
|
||
aPresContext->ScreenSizeInchesForFontInflation(&changed);
|
||
}
|
||
|
||
changed = changed ||
|
||
(fontInflationWasEnabled != presShell->FontSizeInflationEnabled());
|
||
if (changed) {
|
||
nsCOMPtr<nsIDocShell> docShell = aPresContext->GetDocShell();
|
||
if (docShell) {
|
||
nsCOMPtr<nsIContentViewer> cv;
|
||
docShell->GetContentViewer(getter_AddRefs(cv));
|
||
if (cv) {
|
||
nsTArray<nsCOMPtr<nsIContentViewer> > array;
|
||
cv->AppendSubtree(array);
|
||
for (uint32_t i = 0, iEnd = array.Length(); i < iEnd; ++i) {
|
||
nsCOMPtr<nsIPresShell> shell;
|
||
nsCOMPtr<nsIContentViewer> cv = array[i];
|
||
cv->GetPresShell(getter_AddRefs(shell));
|
||
if (shell) {
|
||
nsIFrame *rootFrame = shell->GetRootFrame();
|
||
if (rootFrame) {
|
||
shell->FrameNeedsReflow(rootFrame,
|
||
nsIPresShell::eStyleChange,
|
||
NS_FRAME_IS_DIRTY);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetScrollPositionClampingScrollPortSize(nsIPresShell* aPresShell, CSSSize aSize)
|
||
{
|
||
MOZ_ASSERT(aSize.width >= 0.0 && aSize.height >= 0.0);
|
||
|
||
aPresShell->SetScrollPositionClampingScrollPortSize(
|
||
nsPresContext::CSSPixelsToAppUnits(aSize.width),
|
||
nsPresContext::CSSPixelsToAppUnits(aSize.height));
|
||
|
||
// When the "font.size.inflation.minTwips" preference is set, the
|
||
// layout depends on the size of the screen. Since when the size
|
||
// of the screen changes, the scroll position clamping scroll port
|
||
// size also changes, we hook in the needed updates here rather
|
||
// than adding a separate notification just for this change.
|
||
nsPresContext* presContext = aPresShell->GetPresContext();
|
||
MaybeReflowForInflationScreenSizeChange(presContext);
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::SetCSSViewport(nsIPresShell* aPresShell, CSSSize aSize)
|
||
{
|
||
MOZ_ASSERT(aSize.width >= 0.0 && aSize.height >= 0.0);
|
||
|
||
nscoord width = nsPresContext::CSSPixelsToAppUnits(aSize.width);
|
||
nscoord height = nsPresContext::CSSPixelsToAppUnits(aSize.height);
|
||
|
||
aPresShell->ResizeReflowOverride(width, height);
|
||
}
|
||
|
||
/* static */ FrameMetrics
|
||
nsLayoutUtils::ComputeFrameMetrics(nsIFrame* aForFrame,
|
||
nsIFrame* aScrollFrame,
|
||
nsIContent* aContent,
|
||
const nsIFrame* aReferenceFrame,
|
||
Layer* aLayer,
|
||
ViewID aScrollParentId,
|
||
const nsRect& aViewport,
|
||
const Maybe<nsRect>& aClipRect,
|
||
bool aIsRootContent,
|
||
const ContainerLayerParameters& aContainerParameters)
|
||
{
|
||
nsPresContext* presContext = aForFrame->PresContext();
|
||
int32_t auPerDevPixel = presContext->AppUnitsPerDevPixel();
|
||
|
||
nsIPresShell* presShell = presContext->GetPresShell();
|
||
FrameMetrics metrics;
|
||
metrics.SetViewport(CSSRect::FromAppUnits(aViewport));
|
||
|
||
ViewID scrollId = FrameMetrics::NULL_SCROLL_ID;
|
||
if (aContent) {
|
||
scrollId = nsLayoutUtils::FindOrCreateIDFor(aContent);
|
||
nsRect dp;
|
||
if (nsLayoutUtils::GetDisplayPort(aContent, &dp)) {
|
||
metrics.SetDisplayPort(CSSRect::FromAppUnits(dp));
|
||
nsLayoutUtils::LogTestDataForPaint(aLayer->Manager(), scrollId, "displayport",
|
||
metrics.GetDisplayPort());
|
||
}
|
||
if (nsLayoutUtils::GetCriticalDisplayPort(aContent, &dp)) {
|
||
metrics.SetCriticalDisplayPort(CSSRect::FromAppUnits(dp));
|
||
}
|
||
DisplayPortMarginsPropertyData* marginsData =
|
||
static_cast<DisplayPortMarginsPropertyData*>(aContent->GetProperty(nsGkAtoms::DisplayPortMargins));
|
||
if (marginsData) {
|
||
metrics.SetDisplayPortMargins(marginsData->mMargins);
|
||
}
|
||
}
|
||
|
||
nsIScrollableFrame* scrollableFrame = nullptr;
|
||
if (aScrollFrame)
|
||
scrollableFrame = aScrollFrame->GetScrollTargetFrame();
|
||
|
||
metrics.SetScrollableRect(CSSRect::FromAppUnits(
|
||
nsLayoutUtils::CalculateScrollableRectForFrame(scrollableFrame, aForFrame)));
|
||
|
||
if (scrollableFrame) {
|
||
nsPoint scrollPosition = scrollableFrame->GetScrollPosition();
|
||
metrics.SetScrollOffset(CSSPoint::FromAppUnits(scrollPosition));
|
||
|
||
nsPoint smoothScrollPosition = scrollableFrame->LastScrollDestination();
|
||
metrics.SetSmoothScrollOffset(CSSPoint::FromAppUnits(smoothScrollPosition));
|
||
|
||
// If the frame was scrolled since the last layers update, and by
|
||
// something other than the APZ code, we want to tell the APZ to update
|
||
// its scroll offset.
|
||
nsIAtom* lastScrollOrigin = scrollableFrame->LastScrollOrigin();
|
||
if (lastScrollOrigin && lastScrollOrigin != nsGkAtoms::apz) {
|
||
metrics.SetScrollOffsetUpdated(scrollableFrame->CurrentScrollGeneration());
|
||
}
|
||
nsIAtom* lastSmoothScrollOrigin = scrollableFrame->LastSmoothScrollOrigin();
|
||
if (lastSmoothScrollOrigin) {
|
||
metrics.SetSmoothScrollOffsetUpdated(scrollableFrame->CurrentScrollGeneration());
|
||
}
|
||
|
||
nsSize lineScrollAmount = scrollableFrame->GetLineScrollAmount();
|
||
LayoutDeviceIntSize lineScrollAmountInDevPixels =
|
||
LayoutDeviceIntSize::FromAppUnitsRounded(lineScrollAmount, presContext->AppUnitsPerDevPixel());
|
||
metrics.SetLineScrollAmount(lineScrollAmountInDevPixels);
|
||
|
||
nsSize pageScrollAmount = scrollableFrame->GetPageScrollAmount();
|
||
LayoutDeviceIntSize pageScrollAmountInDevPixels =
|
||
LayoutDeviceIntSize::FromAppUnitsRounded(pageScrollAmount, presContext->AppUnitsPerDevPixel());
|
||
metrics.SetPageScrollAmount(pageScrollAmountInDevPixels);
|
||
|
||
if (!aScrollFrame->GetParent() ||
|
||
EventStateManager::CanVerticallyScrollFrameWithWheel(aScrollFrame->GetParent()))
|
||
{
|
||
metrics.SetAllowVerticalScrollWithWheel();
|
||
}
|
||
|
||
metrics.SetUsesContainerScrolling(scrollableFrame->UsesContainerScrolling());
|
||
}
|
||
|
||
// If we have the scrollparent being the same as the scroll id, the
|
||
// compositor-side code could get into an infinite loop while building the
|
||
// overscroll handoff chain.
|
||
MOZ_ASSERT(aScrollParentId == FrameMetrics::NULL_SCROLL_ID || scrollId != aScrollParentId);
|
||
metrics.SetScrollId(scrollId);
|
||
metrics.SetIsRootContent(aIsRootContent);
|
||
metrics.SetScrollParentId(aScrollParentId);
|
||
|
||
if (scrollId != FrameMetrics::NULL_SCROLL_ID && !presContext->GetParentPresContext()) {
|
||
if ((aScrollFrame && (aScrollFrame == presShell->GetRootScrollFrame())) ||
|
||
aContent == presShell->GetDocument()->GetDocumentElement()) {
|
||
metrics.SetIsLayersIdRoot(true);
|
||
}
|
||
}
|
||
|
||
// Only the root scrollable frame for a given presShell should pick up
|
||
// the presShell's resolution. All the other frames are 1.0.
|
||
if (aScrollFrame == presShell->GetRootScrollFrame()) {
|
||
metrics.SetPresShellResolution(presShell->GetResolution());
|
||
} else {
|
||
metrics.SetPresShellResolution(1.0f);
|
||
}
|
||
// The cumulative resolution is the resolution at which the scroll frame's
|
||
// content is actually rendered. It includes the pres shell resolutions of
|
||
// all the pres shells from here up to the root, as well as any css-driven
|
||
// resolution. We don't need to compute it as it's already stored in the
|
||
// container parameters.
|
||
metrics.SetCumulativeResolution(aContainerParameters.Scale());
|
||
|
||
LayoutDeviceToScreenScale2D resolutionToScreen(
|
||
presShell->GetCumulativeResolution()
|
||
* nsLayoutUtils::GetTransformToAncestorScale(aScrollFrame ? aScrollFrame : aForFrame));
|
||
metrics.SetExtraResolution(metrics.GetCumulativeResolution() / resolutionToScreen);
|
||
|
||
metrics.SetDevPixelsPerCSSPixel(CSSToLayoutDeviceScale(
|
||
(float)nsPresContext::AppUnitsPerCSSPixel() / auPerDevPixel));
|
||
|
||
// Initially, AsyncPanZoomController should render the content to the screen
|
||
// at the painted resolution.
|
||
const LayerToParentLayerScale layerToParentLayerScale(1.0f);
|
||
metrics.SetZoom(metrics.GetCumulativeResolution() * metrics.GetDevPixelsPerCSSPixel()
|
||
* layerToParentLayerScale);
|
||
|
||
// Calculate the composition bounds as the size of the scroll frame and
|
||
// its origin relative to the reference frame.
|
||
// If aScrollFrame is null, we are in a document without a root scroll frame,
|
||
// so it's a xul document. In this case, use the size of the viewport frame.
|
||
nsIFrame* frameForCompositionBoundsCalculation = aScrollFrame ? aScrollFrame : aForFrame;
|
||
nsRect compositionBounds(frameForCompositionBoundsCalculation->GetOffsetToCrossDoc(aReferenceFrame),
|
||
frameForCompositionBoundsCalculation->GetSize());
|
||
if (scrollableFrame) {
|
||
// If we have a scrollable frame, restrict the composition bounds to its
|
||
// scroll port. The scroll port excludes the frame borders and the scroll
|
||
// bars, which we don't want to be part of the composition bounds.
|
||
nsRect scrollPort = scrollableFrame->GetScrollPortRect();
|
||
compositionBounds = nsRect(compositionBounds.TopLeft() + scrollPort.TopLeft(),
|
||
scrollPort.Size());
|
||
}
|
||
ParentLayerRect frameBounds = LayoutDeviceRect::FromAppUnits(compositionBounds, auPerDevPixel)
|
||
* metrics.GetCumulativeResolution()
|
||
* layerToParentLayerScale;
|
||
|
||
if (aClipRect) {
|
||
ParentLayerRect rect = LayoutDeviceRect::FromAppUnits(*aClipRect, auPerDevPixel)
|
||
* metrics.GetCumulativeResolution()
|
||
* layerToParentLayerScale;
|
||
metrics.SetClipRect(Some(RoundedToInt(rect)));
|
||
}
|
||
|
||
// For the root scroll frame of the root content document (RCD-RSF), the above calculation
|
||
// will yield the size of the viewport frame as the composition bounds, which
|
||
// doesn't actually correspond to what is visible when
|
||
// nsIDOMWindowUtils::setCSSViewport has been called to modify the visible area of
|
||
// the prescontext that the viewport frame is reflowed into. In that case if our
|
||
// document has a widget then the widget's bounds will correspond to what is
|
||
// visible. If we don't have a widget the root view's bounds correspond to what
|
||
// would be visible because they don't get modified by setCSSViewport.
|
||
bool isRootScrollFrame = aScrollFrame == presShell->GetRootScrollFrame();
|
||
bool isRootContentDocRootScrollFrame = isRootScrollFrame
|
||
&& presContext->IsRootContentDocument();
|
||
if (isRootContentDocRootScrollFrame) {
|
||
UpdateCompositionBoundsForRCDRSF(frameBounds, presContext,
|
||
compositionBounds, true, metrics.GetCumulativeResolution());
|
||
}
|
||
|
||
nsMargin sizes = ScrollbarAreaToExcludeFromCompositionBoundsFor(aScrollFrame);
|
||
// Scrollbars are not subject to scaling, so CSS pixels = layer pixels for them.
|
||
ParentLayerMargin boundMargins = CSSMargin::FromAppUnits(sizes) * CSSToParentLayerScale(1.0f);
|
||
frameBounds.Deflate(boundMargins);
|
||
|
||
metrics.SetCompositionBounds(frameBounds);
|
||
|
||
metrics.SetRootCompositionSize(
|
||
nsLayoutUtils::CalculateRootCompositionSize(aScrollFrame ? aScrollFrame : aForFrame,
|
||
isRootContentDocRootScrollFrame, metrics));
|
||
|
||
if (gfxPrefs::APZPrintTree()) {
|
||
if (nsIContent* content = frameForCompositionBoundsCalculation->GetContent()) {
|
||
nsAutoString contentDescription;
|
||
content->Describe(contentDescription);
|
||
metrics.SetContentDescription(NS_LossyConvertUTF16toASCII(contentDescription));
|
||
}
|
||
}
|
||
|
||
metrics.SetPresShellId(presShell->GetPresShellId());
|
||
|
||
// If the scroll frame's content is marked 'scrollgrab', record this
|
||
// in the FrameMetrics so APZ knows to provide the scroll grabbing
|
||
// behaviour.
|
||
if (aScrollFrame && nsContentUtils::HasScrollgrab(aScrollFrame->GetContent())) {
|
||
metrics.SetHasScrollgrab(true);
|
||
}
|
||
|
||
// Also compute and set the background color.
|
||
// This is needed for APZ overscrolling support.
|
||
if (aScrollFrame) {
|
||
if (isRootScrollFrame) {
|
||
metrics.SetBackgroundColor(presShell->GetCanvasBackground());
|
||
} else {
|
||
nsStyleContext* backgroundStyle;
|
||
if (nsCSSRendering::FindBackground(aScrollFrame, &backgroundStyle)) {
|
||
metrics.SetBackgroundColor(backgroundStyle->StyleBackground()->mBackgroundColor);
|
||
}
|
||
}
|
||
}
|
||
|
||
return metrics;
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::ContainsMetricsWithId(const Layer* aLayer, const ViewID& aScrollId)
|
||
{
|
||
for (uint32_t i = aLayer->GetFrameMetricsCount(); i > 0; i--) {
|
||
if (aLayer->GetFrameMetrics(i-1).GetScrollId() == aScrollId) {
|
||
return true;
|
||
}
|
||
}
|
||
for (Layer* child = aLayer->GetFirstChild(); child; child = child->GetNextSibling()) {
|
||
if (ContainsMetricsWithId(child, aScrollId)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* static */ uint32_t
|
||
nsLayoutUtils::GetTouchActionFromFrame(nsIFrame* aFrame)
|
||
{
|
||
// If aFrame is null then return default value
|
||
if (!aFrame) {
|
||
return NS_STYLE_TOUCH_ACTION_AUTO;
|
||
}
|
||
|
||
// The touch-action CSS property applies to: all elements except:
|
||
// non-replaced inline elements, table rows, row groups, table columns, and column groups
|
||
bool isNonReplacedInlineElement = aFrame->IsFrameOfType(nsIFrame::eLineParticipant);
|
||
if (isNonReplacedInlineElement) {
|
||
return NS_STYLE_TOUCH_ACTION_AUTO;
|
||
}
|
||
|
||
const nsStyleDisplay* disp = aFrame->StyleDisplay();
|
||
bool isTableElement = disp->IsInnerTableStyle() &&
|
||
disp->mDisplay != NS_STYLE_DISPLAY_TABLE_CELL &&
|
||
disp->mDisplay != NS_STYLE_DISPLAY_TABLE_CAPTION;
|
||
if (isTableElement) {
|
||
return NS_STYLE_TOUCH_ACTION_AUTO;
|
||
}
|
||
|
||
return disp->mTouchAction;
|
||
}
|
||
|
||
/* static */ void
|
||
nsLayoutUtils::TransformToAncestorAndCombineRegions(
|
||
const nsRect& aBounds,
|
||
nsIFrame* aFrame,
|
||
const nsIFrame* aAncestorFrame,
|
||
nsRegion* aPreciseTargetDest,
|
||
nsRegion* aImpreciseTargetDest)
|
||
{
|
||
if (aBounds.IsEmpty()) {
|
||
return;
|
||
}
|
||
Matrix4x4 matrix = GetTransformToAncestor(aFrame, aAncestorFrame);
|
||
Matrix matrix2D;
|
||
bool isPrecise = (matrix.Is2D(&matrix2D)
|
||
&& !matrix2D.HasNonAxisAlignedTransform());
|
||
nsRect transformed = TransformFrameRectToAncestor(
|
||
aFrame, aBounds, aAncestorFrame);
|
||
nsRegion* dest = isPrecise ? aPreciseTargetDest : aImpreciseTargetDest;
|
||
dest->OrWith(transformed);
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::ShouldUseNoScriptSheet(nsIDocument* aDocument)
|
||
{
|
||
// also handle the case where print is done from print preview
|
||
// see bug #342439 for more details
|
||
if (aDocument->IsStaticDocument()) {
|
||
aDocument = aDocument->GetOriginalDocument();
|
||
}
|
||
return aDocument->IsScriptEnabled();
|
||
}
|
||
|
||
/* static */ bool
|
||
nsLayoutUtils::ShouldUseNoFramesSheet(nsIDocument* aDocument)
|
||
{
|
||
bool allowSubframes = true;
|
||
nsIDocShell* docShell = aDocument->GetDocShell();
|
||
if (docShell) {
|
||
docShell->GetAllowSubframes(&allowSubframes);
|
||
}
|
||
return !allowSubframes;
|
||
}
|