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--HG-- rename : widget/xpwidgets/ContentHelper.cpp => widget/ContentHelper.cpp rename : widget/xpwidgets/ContentHelper.h => widget/ContentHelper.h rename : widget/xpwidgets/GfxDriverInfo.cpp => widget/GfxDriverInfo.cpp rename : widget/xpwidgets/GfxDriverInfo.h => widget/GfxDriverInfo.h rename : widget/xpwidgets/GfxInfoBase.cpp => widget/GfxInfoBase.cpp rename : widget/xpwidgets/GfxInfoBase.h => widget/GfxInfoBase.h rename : widget/xpwidgets/GfxInfoCollector.cpp => widget/GfxInfoCollector.cpp rename : widget/xpwidgets/GfxInfoCollector.h => widget/GfxInfoCollector.h rename : widget/xpwidgets/GfxInfoWebGL.cpp => widget/GfxInfoWebGL.cpp rename : widget/xpwidgets/GfxInfoWebGL.h => widget/GfxInfoWebGL.h rename : widget/xpwidgets/GfxInfoX11.cpp => widget/GfxInfoX11.cpp rename : widget/xpwidgets/GfxInfoX11.h => widget/GfxInfoX11.h rename : widget/xpwidgets/InputData.cpp => widget/InputData.cpp rename : widget/xpwidgets/PuppetWidget.cpp => widget/PuppetWidget.cpp rename : widget/xpwidgets/PuppetWidget.h => widget/PuppetWidget.h rename : widget/xpwidgets/ScreenProxy.cpp => widget/ScreenProxy.cpp rename : widget/xpwidgets/ScreenProxy.h => widget/ScreenProxy.h rename : widget/shared/SharedWidgetUtils.cpp => widget/SharedWidgetUtils.cpp rename : widget/xpwidgets/WidgetUtils.cpp => widget/WidgetUtils.cpp rename : widget/xpwidgets/nsAppShellSingleton.h => widget/nsAppShellSingleton.h rename : widget/xpwidgets/nsBaseAppShell.cpp => widget/nsBaseAppShell.cpp rename : widget/xpwidgets/nsBaseAppShell.h => widget/nsBaseAppShell.h rename : widget/xpwidgets/nsBaseClipboard.cpp => widget/nsBaseClipboard.cpp rename : widget/xpwidgets/nsBaseClipboard.h => widget/nsBaseClipboard.h rename : widget/xpwidgets/nsBaseDragService.cpp => widget/nsBaseDragService.cpp rename : widget/xpwidgets/nsBaseDragService.h => widget/nsBaseDragService.h rename : widget/xpwidgets/nsBaseFilePicker.cpp => widget/nsBaseFilePicker.cpp rename : widget/xpwidgets/nsBaseFilePicker.h => widget/nsBaseFilePicker.h rename : widget/xpwidgets/nsBaseScreen.cpp => widget/nsBaseScreen.cpp rename : widget/xpwidgets/nsBaseScreen.h => widget/nsBaseScreen.h rename : widget/xpwidgets/nsBaseWidget.cpp => widget/nsBaseWidget.cpp rename : widget/xpwidgets/nsBaseWidget.h => widget/nsBaseWidget.h rename : widget/xpwidgets/nsClipboardHelper.cpp => widget/nsClipboardHelper.cpp rename : widget/xpwidgets/nsClipboardHelper.h => widget/nsClipboardHelper.h rename : widget/xpwidgets/nsClipboardProxy.cpp => widget/nsClipboardProxy.cpp rename : widget/xpwidgets/nsClipboardProxy.h => widget/nsClipboardProxy.h rename : widget/xpwidgets/nsColorPickerProxy.cpp => widget/nsColorPickerProxy.cpp rename : widget/xpwidgets/nsColorPickerProxy.h => widget/nsColorPickerProxy.h rename : widget/xpwidgets/nsContentProcessWidgetFactory.cpp => widget/nsContentProcessWidgetFactory.cpp rename : widget/xpwidgets/nsFilePickerProxy.cpp => widget/nsFilePickerProxy.cpp rename : widget/xpwidgets/nsFilePickerProxy.h => widget/nsFilePickerProxy.h rename : widget/xpwidgets/nsHTMLFormatConverter.cpp => widget/nsHTMLFormatConverter.cpp rename : widget/xpwidgets/nsHTMLFormatConverter.h => widget/nsHTMLFormatConverter.h rename : widget/xpwidgets/nsIWidgetListener.cpp => widget/nsIWidgetListener.cpp rename : widget/xpwidgets/nsIdleService.cpp => widget/nsIdleService.cpp rename : widget/xpwidgets/nsIdleService.h => widget/nsIdleService.h rename : widget/xpwidgets/nsNativeTheme.cpp => widget/nsNativeTheme.cpp rename : widget/xpwidgets/nsNativeTheme.h => widget/nsNativeTheme.h rename : widget/xpwidgets/nsPrimitiveHelpers.cpp => widget/nsPrimitiveHelpers.cpp rename : widget/xpwidgets/nsPrimitiveHelpers.h => widget/nsPrimitiveHelpers.h rename : widget/xpwidgets/nsPrintOptionsImpl.cpp => widget/nsPrintOptionsImpl.cpp rename : widget/xpwidgets/nsPrintOptionsImpl.h => widget/nsPrintOptionsImpl.h rename : widget/xpwidgets/nsPrintSession.cpp => widget/nsPrintSession.cpp rename : widget/xpwidgets/nsPrintSession.h => widget/nsPrintSession.h rename : widget/xpwidgets/nsPrintSettingsImpl.cpp => widget/nsPrintSettingsImpl.cpp rename : widget/xpwidgets/nsPrintSettingsImpl.h => widget/nsPrintSettingsImpl.h rename : widget/xpwidgets/nsScreenManagerProxy.cpp => widget/nsScreenManagerProxy.cpp rename : widget/xpwidgets/nsScreenManagerProxy.h => widget/nsScreenManagerProxy.h rename : widget/xpwidgets/nsTransferable.cpp => widget/nsTransferable.cpp rename : widget/xpwidgets/nsTransferable.h => widget/nsTransferable.h rename : widget/xpwidgets/nsXPLookAndFeel.cpp => widget/nsXPLookAndFeel.cpp rename : widget/xpwidgets/nsXPLookAndFeel.h => widget/nsXPLookAndFeel.h
119 lines
5.0 KiB
C++
119 lines
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "ContentHelper.h"
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#include "nsContainerFrame.h"
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#include "nsIContent.h"
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#include "nsIScrollableFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsStyleConsts.h"
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#include "nsView.h"
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namespace mozilla {
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namespace widget {
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uint32_t
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ContentHelper::GetTouchActionFromFrame(nsIFrame* aFrame)
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{
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// If aFrame is null then return default value
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if (!aFrame) {
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return NS_STYLE_TOUCH_ACTION_AUTO;
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}
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// The touch-action CSS property applies to: all elements except:
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// non-replaced inline elements, table rows, row groups, table columns, and column groups
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bool isNonReplacedInlineElement = aFrame->IsFrameOfType(nsIFrame::eLineParticipant);
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if (isNonReplacedInlineElement) {
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return NS_STYLE_TOUCH_ACTION_AUTO;
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}
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const nsStyleDisplay* disp = aFrame->StyleDisplay();
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bool isTableElement = disp->IsInnerTableStyle() &&
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disp->mDisplay != NS_STYLE_DISPLAY_TABLE_CELL &&
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disp->mDisplay != NS_STYLE_DISPLAY_TABLE_CAPTION;
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if (isTableElement) {
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return NS_STYLE_TOUCH_ACTION_AUTO;
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}
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return disp->mTouchAction;
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}
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void
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ContentHelper::UpdateAllowedBehavior(uint32_t aTouchActionValue, bool aConsiderPanning, TouchBehaviorFlags& aOutBehavior)
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{
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if (aTouchActionValue != NS_STYLE_TOUCH_ACTION_AUTO) {
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// Double-tap-zooming need property value AUTO
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aOutBehavior &= ~AllowedTouchBehavior::DOUBLE_TAP_ZOOM;
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if (aTouchActionValue != NS_STYLE_TOUCH_ACTION_MANIPULATION) {
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// Pinch-zooming need value AUTO or MANIPULATION
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aOutBehavior &= ~AllowedTouchBehavior::PINCH_ZOOM;
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}
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}
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if (aConsiderPanning) {
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if (aTouchActionValue == NS_STYLE_TOUCH_ACTION_NONE) {
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aOutBehavior &= ~AllowedTouchBehavior::VERTICAL_PAN;
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aOutBehavior &= ~AllowedTouchBehavior::HORIZONTAL_PAN;
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}
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// Values pan-x and pan-y set at the same time to the same element do not affect panning constraints.
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// Therefore we need to check whether pan-x is set without pan-y and the same for pan-y.
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if ((aTouchActionValue & NS_STYLE_TOUCH_ACTION_PAN_X) && !(aTouchActionValue & NS_STYLE_TOUCH_ACTION_PAN_Y)) {
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aOutBehavior &= ~AllowedTouchBehavior::VERTICAL_PAN;
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} else if ((aTouchActionValue & NS_STYLE_TOUCH_ACTION_PAN_Y) && !(aTouchActionValue & NS_STYLE_TOUCH_ACTION_PAN_X)) {
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aOutBehavior &= ~AllowedTouchBehavior::HORIZONTAL_PAN;
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}
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}
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}
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ContentHelper::TouchBehaviorFlags
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ContentHelper::GetAllowedTouchBehavior(nsIWidget* aWidget, const nsIntPoint& aPoint)
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{
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nsView *view = nsView::GetViewFor(aWidget);
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nsIFrame *viewFrame = view->GetFrame();
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nsPoint relativePoint = nsLayoutUtils::GetEventCoordinatesRelativeTo(aWidget, aPoint, viewFrame);
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nsIFrame *target = nsLayoutUtils::GetFrameForPoint(viewFrame, relativePoint, nsLayoutUtils::IGNORE_ROOT_SCROLL_FRAME);
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nsIScrollableFrame *nearestScrollableParent = nsLayoutUtils::GetNearestScrollableFrame(target, 0);
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nsIFrame* nearestScrollableFrame = do_QueryFrame(nearestScrollableParent);
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// We're walking up the DOM tree until we meet the element with touch behavior and accumulating
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// touch-action restrictions of all elements in this chain.
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// The exact quote from the spec, that clarifies more:
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// To determine the effect of a touch, find the nearest ancestor (starting from the element itself)
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// that has a default touch behavior. Then examine the touch-action property of each element between
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// the hit tested element and the element with the default touch behavior (including both the hit
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// tested element and the element with the default touch behavior). If the touch-action property of
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// any of those elements disallows the default touch behavior, do nothing. Otherwise allow the element
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// to start considering the touch for the purposes of executing a default touch behavior.
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// Currently we support only two touch behaviors: panning and zooming.
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// For panning we walk up until we meet the first scrollable element (the element that supports panning)
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// or root element.
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// For zooming we walk up until the root element since Firefox currently supports only zooming of the
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// root frame but not the subframes.
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bool considerPanning = true;
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TouchBehaviorFlags behavior = AllowedTouchBehavior::VERTICAL_PAN | AllowedTouchBehavior::HORIZONTAL_PAN |
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AllowedTouchBehavior::PINCH_ZOOM | AllowedTouchBehavior::DOUBLE_TAP_ZOOM;
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for (nsIFrame *frame = target; frame && frame->GetContent() && behavior; frame = frame->GetParent()) {
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UpdateAllowedBehavior(GetTouchActionFromFrame(frame), considerPanning, behavior);
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if (frame == nearestScrollableFrame) {
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// We met the scrollable element, after it we shouldn't consider touch-action
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// values for the purpose of panning but only for zooming.
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considerPanning = false;
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}
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}
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return behavior;
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}
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}
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}
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