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0c9d4ac32b
We need to ensure we transfer (or clear) all subproperties of a shorthand that is only enabled in UA style sheets or in certified apps. Otherwise, the shorthand will parse correctly and get stored on the nsCSSExpandedDataBlock but the transfer (or clear) method will skip all of the subproperties.
720 lines
25 KiB
C++
720 lines
25 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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/*
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* compact representation of the property-value pairs within a CSS
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* declaration, and the code for expanding and compacting it
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*/
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#include "nsCSSDataBlock.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/css/Declaration.h"
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#include "mozilla/css/ImageLoader.h"
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#include "nsRuleData.h"
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#include "nsStyleSet.h"
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#include "nsStyleContext.h"
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#include "nsIDocument.h"
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#include "WritingModes.h"
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using namespace mozilla;
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/**
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* Does a fast move of aSource to aDest. The previous value in
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* aDest is cleanly destroyed, and aSource is cleared. Returns
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* true if, before the copy, the value at aSource compared unequal
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* to the value at aDest; false otherwise.
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*/
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static bool
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MoveValue(nsCSSValue* aSource, nsCSSValue* aDest)
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{
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bool changed = (*aSource != *aDest);
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aDest->~nsCSSValue();
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memcpy(aDest, aSource, sizeof(nsCSSValue));
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new (aSource) nsCSSValue();
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return changed;
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}
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static bool
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ShouldIgnoreColors(nsRuleData *aRuleData)
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{
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return aRuleData->mLevel != nsStyleSet::eAgentSheet &&
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aRuleData->mLevel != nsStyleSet::eUserSheet &&
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!aRuleData->mPresContext->UseDocumentColors();
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}
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/**
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* Tries to call |nsCSSValue::StartImageLoad()| on an image source.
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* Image sources are specified by |url()| or |-moz-image-rect()| function.
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*/
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static void
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TryToStartImageLoadOnValue(const nsCSSValue& aValue, nsIDocument* aDocument,
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nsCSSValueTokenStream* aTokenStream)
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{
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MOZ_ASSERT(aDocument);
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if (aValue.GetUnit() == eCSSUnit_URL) {
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aValue.StartImageLoad(aDocument);
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if (aTokenStream) {
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aTokenStream->mImageValues.PutEntry(aValue.GetImageStructValue());
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}
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}
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else if (aValue.GetUnit() == eCSSUnit_Image) {
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// If we already have a request, see if this document needs to clone it.
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imgIRequest* request = aValue.GetImageValue(nullptr);
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if (request) {
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mozilla::css::ImageValue* imageValue = aValue.GetImageStructValue();
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aDocument->StyleImageLoader()->MaybeRegisterCSSImage(imageValue);
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if (aTokenStream) {
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aTokenStream->mImageValues.PutEntry(imageValue);
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}
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}
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}
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else if (aValue.EqualsFunction(eCSSKeyword__moz_image_rect)) {
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nsCSSValue::Array* arguments = aValue.GetArrayValue();
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NS_ABORT_IF_FALSE(arguments->Count() == 6, "unexpected num of arguments");
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const nsCSSValue& image = arguments->Item(1);
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TryToStartImageLoadOnValue(image, aDocument, aTokenStream);
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}
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}
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static void
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TryToStartImageLoad(const nsCSSValue& aValue, nsIDocument* aDocument,
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nsCSSProperty aProperty,
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nsCSSValueTokenStream* aTokenStream)
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{
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if (aValue.GetUnit() == eCSSUnit_List) {
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for (const nsCSSValueList* l = aValue.GetListValue(); l; l = l->mNext) {
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TryToStartImageLoad(l->mValue, aDocument, aProperty, aTokenStream);
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}
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} else if (nsCSSProps::PropHasFlags(aProperty,
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CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0)) {
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if (aValue.GetUnit() == eCSSUnit_Array) {
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TryToStartImageLoadOnValue(aValue.GetArrayValue()->Item(0), aDocument,
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aTokenStream);
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}
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} else {
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TryToStartImageLoadOnValue(aValue, aDocument, aTokenStream);
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}
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}
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static inline bool
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ShouldStartImageLoads(nsRuleData *aRuleData, nsCSSProperty aProperty)
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{
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// Don't initiate image loads for if-visited styles. This is
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// important because:
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// (1) it's a waste of CPU and bandwidth
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// (2) in some cases we'd start the image load on a style change
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// where we wouldn't have started the load initially, which makes
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// which links are visited detectable to Web pages (see bug
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// 557287)
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return !aRuleData->mStyleContext->IsStyleIfVisited() &&
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nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_START_IMAGE_LOADS);
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}
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static void
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MapSinglePropertyInto(nsCSSProperty aProp,
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const nsCSSValue* aValue,
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nsCSSValue* aTarget,
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nsRuleData* aRuleData)
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{
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NS_ABORT_IF_FALSE(aValue->GetUnit() != eCSSUnit_Null, "oops");
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// Although aTarget is the nsCSSValue we are going to write into,
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// we also look at its value before writing into it. This is done
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// when aTarget is a token stream value, which is the case when we
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// have just re-parsed a property that had a variable reference (in
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// nsCSSParser::ParsePropertyWithVariableReferences). TryToStartImageLoad
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// then records any resulting ImageValue objects on the
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// nsCSSValueTokenStream object we found on aTarget. See the comment
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// above nsCSSValueTokenStream::mImageValues for why.
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NS_ABORT_IF_FALSE(aTarget->GetUnit() == eCSSUnit_TokenStream ||
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aTarget->GetUnit() == eCSSUnit_Null,
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"aTarget must only be a token stream (when re-parsing "
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"properties with variable references) or null");
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nsCSSValueTokenStream* tokenStream =
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aTarget->GetUnit() == eCSSUnit_TokenStream ?
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aTarget->GetTokenStreamValue() :
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nullptr;
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if (ShouldStartImageLoads(aRuleData, aProp)) {
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nsIDocument* doc = aRuleData->mPresContext->Document();
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TryToStartImageLoad(*aValue, doc, aProp, tokenStream);
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}
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*aTarget = *aValue;
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if (nsCSSProps::PropHasFlags(aProp,
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CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) &&
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ShouldIgnoreColors(aRuleData))
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{
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if (aProp == eCSSProperty_background_color) {
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// Force non-'transparent' background
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// colors to the user's default.
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if (aTarget->IsNonTransparentColor()) {
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aTarget->SetColorValue(aRuleData->mPresContext->
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DefaultBackgroundColor());
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}
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} else {
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// Ignore 'color', 'border-*-color', etc.
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*aTarget = nsCSSValue();
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}
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}
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}
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/**
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* If aProperty is a logical property, converts it to the equivalent physical
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* property based on writing mode information obtained from aRuleData's
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* style context.
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*/
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static inline void
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EnsurePhysicalProperty(nsCSSProperty& aProperty, nsRuleData* aRuleData)
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{
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bool isAxisProperty =
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nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_AXIS);
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bool isBlock =
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nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_BLOCK_AXIS);
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int index;
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if (isAxisProperty) {
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LogicalAxis logicalAxis = isBlock ? eLogicalAxisBlock : eLogicalAxisInline;
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uint8_t wm = aRuleData->mStyleContext->StyleVisibility()->mWritingMode;
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PhysicalAxis axis =
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WritingMode::PhysicalAxisForLogicalAxis(wm, logicalAxis);
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// We rely on physical axis constants values matching the order of the
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// physical properties in the logical group array.
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static_assert(eAxisVertical == 0 && eAxisHorizontal == 1,
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"unexpected axis constant values");
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index = axis;
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} else {
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bool isEnd =
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nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_END_EDGE);
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LogicalEdge edge = isEnd ? eLogicalEdgeEnd : eLogicalEdgeStart;
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// We handle block axis logical properties separately to save a bit of
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// work that the WritingMode constructor does that is unnecessary
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// unless we have an inline axis property.
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mozilla::css::Side side;
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if (isBlock) {
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uint8_t wm = aRuleData->mStyleContext->StyleVisibility()->mWritingMode;
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side = WritingMode::PhysicalSideForBlockAxis(wm, edge);
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} else {
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WritingMode wm(aRuleData->mStyleContext);
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side = wm.PhysicalSideForInlineAxis(edge);
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}
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// We rely on the physical side constant values matching the order of
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// the physical properties in the logical group array.
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static_assert(NS_SIDE_TOP == 0 && NS_SIDE_RIGHT == 1 &&
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NS_SIDE_BOTTOM == 2 && NS_SIDE_LEFT == 3,
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"unexpected side constant values");
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index = side;
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}
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const nsCSSProperty* props = nsCSSProps::LogicalGroup(aProperty);
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#ifdef DEBUG
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{
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size_t len = isAxisProperty ? 2 : 4;
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for (size_t i = 0; i < len; i++) {
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MOZ_ASSERT(props[i] != eCSSProperty_UNKNOWN,
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"unexpected logical group length");
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}
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MOZ_ASSERT(props[len] == eCSSProperty_UNKNOWN,
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"unexpected logical group length");
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}
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#endif
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aProperty = props[index];
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}
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void
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nsCSSCompressedDataBlock::MapRuleInfoInto(nsRuleData *aRuleData) const
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{
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// If we have no data for these structs, then return immediately.
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// This optimization should make us return most of the time, so we
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// have to worry much less (although still some) about the speed of
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// the rest of the function.
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if (!(aRuleData->mSIDs & mStyleBits))
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return;
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// We process these in reverse order so that we end up mapping the
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// right property when one can be expressed using both logical and
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// physical property names.
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for (uint32_t i = mNumProps; i-- > 0; ) {
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nsCSSProperty iProp = PropertyAtIndex(i);
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if (nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]) &
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aRuleData->mSIDs) {
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if (nsCSSProps::PropHasFlags(iProp, CSS_PROPERTY_LOGICAL)) {
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EnsurePhysicalProperty(iProp, aRuleData);
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// We can't cache anything on the rule tree if we use any data from
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// the style context, since data cached in the rule tree could be
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// used with a style context with a different value.
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aRuleData->mCanStoreInRuleTree = false;
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}
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nsCSSValue* target = aRuleData->ValueFor(iProp);
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if (target->GetUnit() == eCSSUnit_Null) {
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const nsCSSValue *val = ValueAtIndex(i);
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MapSinglePropertyInto(iProp, val, target, aRuleData);
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}
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}
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}
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}
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const nsCSSValue*
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nsCSSCompressedDataBlock::ValueFor(nsCSSProperty aProperty) const
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{
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NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aProperty),
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"Don't call for shorthands");
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// If we have no data for this struct, then return immediately.
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// This optimization should make us return most of the time, so we
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// have to worry much less (although still some) about the speed of
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// the rest of the function.
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if (!(nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[aProperty]) &
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mStyleBits))
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return nullptr;
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for (uint32_t i = 0; i < mNumProps; i++) {
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if (PropertyAtIndex(i) == aProperty) {
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return ValueAtIndex(i);
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}
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}
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return nullptr;
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}
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bool
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nsCSSCompressedDataBlock::TryReplaceValue(nsCSSProperty aProperty,
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nsCSSExpandedDataBlock& aFromBlock,
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bool *aChanged)
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{
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nsCSSValue* newValue = aFromBlock.PropertyAt(aProperty);
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NS_ABORT_IF_FALSE(newValue && newValue->GetUnit() != eCSSUnit_Null,
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"cannot replace with empty value");
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const nsCSSValue* oldValue = ValueFor(aProperty);
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if (!oldValue) {
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*aChanged = false;
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return false;
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}
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*aChanged = MoveValue(newValue, const_cast<nsCSSValue*>(oldValue));
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aFromBlock.ClearPropertyBit(aProperty);
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return true;
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}
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nsCSSCompressedDataBlock*
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nsCSSCompressedDataBlock::Clone() const
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{
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nsAutoPtr<nsCSSCompressedDataBlock>
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result(new(mNumProps) nsCSSCompressedDataBlock(mNumProps));
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result->mStyleBits = mStyleBits;
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for (uint32_t i = 0; i < mNumProps; i++) {
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result->SetPropertyAtIndex(i, PropertyAtIndex(i));
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result->CopyValueToIndex(i, ValueAtIndex(i));
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}
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return result.forget();
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}
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nsCSSCompressedDataBlock::~nsCSSCompressedDataBlock()
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{
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for (uint32_t i = 0; i < mNumProps; i++) {
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#ifdef DEBUG
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(void)PropertyAtIndex(i); // this checks the property is in range
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#endif
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const nsCSSValue* val = ValueAtIndex(i);
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NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null, "oops");
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val->~nsCSSValue();
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}
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}
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/* static */ nsCSSCompressedDataBlock*
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nsCSSCompressedDataBlock::CreateEmptyBlock()
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{
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nsCSSCompressedDataBlock *result = new(0) nsCSSCompressedDataBlock(0);
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return result;
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}
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size_t
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nsCSSCompressedDataBlock::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
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{
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size_t n = aMallocSizeOf(this);
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for (uint32_t i = 0; i < mNumProps; i++) {
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n += ValueAtIndex(i)->SizeOfExcludingThis(aMallocSizeOf);
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}
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return n;
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}
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bool
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nsCSSCompressedDataBlock::HasDefaultBorderImageSlice() const
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{
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const nsCSSValueList *slice =
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ValueFor(eCSSProperty_border_image_slice)->GetListValue();
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return !slice->mNext &&
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slice->mValue.GetRectValue().AllSidesEqualTo(
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nsCSSValue(1.0f, eCSSUnit_Percent));
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}
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bool
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nsCSSCompressedDataBlock::HasDefaultBorderImageWidth() const
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{
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const nsCSSRect &width =
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ValueFor(eCSSProperty_border_image_width)->GetRectValue();
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return width.AllSidesEqualTo(nsCSSValue(1.0f, eCSSUnit_Number));
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}
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bool
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nsCSSCompressedDataBlock::HasDefaultBorderImageOutset() const
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{
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const nsCSSRect &outset =
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ValueFor(eCSSProperty_border_image_outset)->GetRectValue();
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return outset.AllSidesEqualTo(nsCSSValue(0.0f, eCSSUnit_Number));
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}
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bool
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nsCSSCompressedDataBlock::HasDefaultBorderImageRepeat() const
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{
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const nsCSSValuePair &repeat =
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ValueFor(eCSSProperty_border_image_repeat)->GetPairValue();
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return repeat.BothValuesEqualTo(
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nsCSSValue(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH, eCSSUnit_Enumerated));
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}
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/*****************************************************************************/
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nsCSSExpandedDataBlock::nsCSSExpandedDataBlock()
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{
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AssertInitialState();
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}
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nsCSSExpandedDataBlock::~nsCSSExpandedDataBlock()
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{
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AssertInitialState();
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}
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void
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nsCSSExpandedDataBlock::DoExpand(nsCSSCompressedDataBlock *aBlock,
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bool aImportant)
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{
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/*
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* Save needless copying and allocation by copying the memory
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* corresponding to the stored data in the compressed block.
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*/
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for (uint32_t i = 0; i < aBlock->mNumProps; i++) {
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nsCSSProperty iProp = aBlock->PropertyAtIndex(i);
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NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
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NS_ABORT_IF_FALSE(!HasPropertyBit(iProp),
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"compressed block has property multiple times");
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SetPropertyBit(iProp);
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if (aImportant)
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SetImportantBit(iProp);
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const nsCSSValue* val = aBlock->ValueAtIndex(i);
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nsCSSValue* dest = PropertyAt(iProp);
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NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null, "oops");
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NS_ABORT_IF_FALSE(dest->GetUnit() == eCSSUnit_Null,
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"expanding into non-empty block");
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#ifdef NS_BUILD_REFCNT_LOGGING
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dest->~nsCSSValue();
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#endif
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memcpy(dest, val, sizeof(nsCSSValue));
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}
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// Set the number of properties to zero so that we don't destroy the
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// remnants of what we just copied.
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aBlock->SetNumPropsToZero();
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delete aBlock;
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}
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void
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nsCSSExpandedDataBlock::Expand(nsCSSCompressedDataBlock *aNormalBlock,
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nsCSSCompressedDataBlock *aImportantBlock)
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{
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NS_ABORT_IF_FALSE(aNormalBlock, "unexpected null block");
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AssertInitialState();
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DoExpand(aNormalBlock, false);
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if (aImportantBlock) {
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DoExpand(aImportantBlock, true);
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}
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}
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void
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nsCSSExpandedDataBlock::ComputeNumProps(uint32_t* aNumPropsNormal,
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uint32_t* aNumPropsImportant)
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{
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*aNumPropsNormal = *aNumPropsImportant = 0;
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for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
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if (!mPropertiesSet.HasPropertyInChunk(iHigh))
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continue;
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for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
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if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
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continue;
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#ifdef DEBUG
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nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
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#endif
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NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
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NS_ABORT_IF_FALSE(PropertyAt(iProp)->GetUnit() != eCSSUnit_Null,
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"null value while computing size");
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if (mPropertiesImportant.HasPropertyAt(iHigh, iLow))
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(*aNumPropsImportant)++;
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else
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(*aNumPropsNormal)++;
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}
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}
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}
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void
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nsCSSExpandedDataBlock::Compress(nsCSSCompressedDataBlock **aNormalBlock,
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nsCSSCompressedDataBlock **aImportantBlock,
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const nsTArray<uint32_t>& aOrder)
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{
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nsAutoPtr<nsCSSCompressedDataBlock> result_normal, result_important;
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uint32_t i_normal = 0, i_important = 0;
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uint32_t numPropsNormal, numPropsImportant;
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ComputeNumProps(&numPropsNormal, &numPropsImportant);
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result_normal =
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new(numPropsNormal) nsCSSCompressedDataBlock(numPropsNormal);
|
|
|
|
if (numPropsImportant != 0) {
|
|
result_important =
|
|
new(numPropsImportant) nsCSSCompressedDataBlock(numPropsImportant);
|
|
} else {
|
|
result_important = nullptr;
|
|
}
|
|
|
|
/*
|
|
* Save needless copying and allocation by copying the memory
|
|
* corresponding to the stored data in the expanded block, and then
|
|
* clearing the data in the expanded block.
|
|
*/
|
|
for (size_t i = 0; i < aOrder.Length(); i++) {
|
|
nsCSSProperty iProp = static_cast<nsCSSProperty>(aOrder[i]);
|
|
if (iProp >= eCSSProperty_COUNT) {
|
|
// a custom property
|
|
continue;
|
|
}
|
|
NS_ABORT_IF_FALSE(mPropertiesSet.HasProperty(iProp),
|
|
"aOrder identifies a property not in the expanded "
|
|
"data block");
|
|
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
|
|
bool important = mPropertiesImportant.HasProperty(iProp);
|
|
nsCSSCompressedDataBlock *result =
|
|
important ? result_important : result_normal;
|
|
uint32_t* ip = important ? &i_important : &i_normal;
|
|
nsCSSValue* val = PropertyAt(iProp);
|
|
NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null,
|
|
"Null value while compressing");
|
|
result->SetPropertyAtIndex(*ip, iProp);
|
|
result->RawCopyValueToIndex(*ip, val);
|
|
new (val) nsCSSValue();
|
|
(*ip)++;
|
|
result->mStyleBits |=
|
|
nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]);
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(numPropsNormal == i_normal, "bad numProps");
|
|
|
|
if (result_important) {
|
|
NS_ABORT_IF_FALSE(numPropsImportant == i_important, "bad numProps");
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
// assert that we didn't have any other properties on this expanded data
|
|
// block that we didn't find in aOrder
|
|
uint32_t numPropsInSet = 0;
|
|
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; iHigh++) {
|
|
if (!mPropertiesSet.HasPropertyInChunk(iHigh)) {
|
|
continue;
|
|
}
|
|
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; iLow++) {
|
|
if (mPropertiesSet.HasPropertyAt(iHigh, iLow)) {
|
|
numPropsInSet++;
|
|
}
|
|
}
|
|
}
|
|
NS_ABORT_IF_FALSE(numPropsNormal + numPropsImportant == numPropsInSet,
|
|
"aOrder missing properties from the expanded data "
|
|
"block");
|
|
}
|
|
#endif
|
|
|
|
ClearSets();
|
|
AssertInitialState();
|
|
*aNormalBlock = result_normal.forget();
|
|
*aImportantBlock = result_important.forget();
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::AddLonghandProperty(nsCSSProperty aProperty,
|
|
const nsCSSValue& aValue)
|
|
{
|
|
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aProperty),
|
|
"property out of range");
|
|
nsCSSValue& storage = *static_cast<nsCSSValue*>(PropertyAt(aProperty));
|
|
storage = aValue;
|
|
SetPropertyBit(aProperty);
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::Clear()
|
|
{
|
|
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
|
|
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
|
|
continue;
|
|
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
|
|
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
|
|
continue;
|
|
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
|
|
ClearLonghandProperty(iProp);
|
|
}
|
|
}
|
|
|
|
AssertInitialState();
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::ClearProperty(nsCSSProperty aPropID)
|
|
{
|
|
if (nsCSSProps::IsShorthand(aPropID)) {
|
|
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aPropID,
|
|
nsCSSProps::eIgnoreEnabledState) {
|
|
ClearLonghandProperty(*p);
|
|
}
|
|
} else {
|
|
ClearLonghandProperty(aPropID);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::ClearLonghandProperty(nsCSSProperty aPropID)
|
|
{
|
|
NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aPropID), "out of range");
|
|
|
|
ClearPropertyBit(aPropID);
|
|
ClearImportantBit(aPropID);
|
|
PropertyAt(aPropID)->Reset();
|
|
}
|
|
|
|
bool
|
|
nsCSSExpandedDataBlock::TransferFromBlock(nsCSSExpandedDataBlock& aFromBlock,
|
|
nsCSSProperty aPropID,
|
|
nsCSSProps::EnabledState aEnabledState,
|
|
bool aIsImportant,
|
|
bool aOverrideImportant,
|
|
bool aMustCallValueAppended,
|
|
css::Declaration* aDeclaration)
|
|
{
|
|
if (!nsCSSProps::IsShorthand(aPropID)) {
|
|
return DoTransferFromBlock(aFromBlock, aPropID,
|
|
aIsImportant, aOverrideImportant,
|
|
aMustCallValueAppended, aDeclaration);
|
|
}
|
|
|
|
// We can pass eIgnoreEnabledState (here, and in ClearProperty above) rather
|
|
// than a value corresponding to whether we're parsing a UA style sheet or
|
|
// certified app because we assert in nsCSSProps::AddRefTable that shorthand
|
|
// properties available in these contexts also have all of their
|
|
// subproperties available in these contexts.
|
|
bool changed = false;
|
|
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aPropID, aEnabledState) {
|
|
changed |= DoTransferFromBlock(aFromBlock, *p,
|
|
aIsImportant, aOverrideImportant,
|
|
aMustCallValueAppended, aDeclaration);
|
|
}
|
|
return changed;
|
|
}
|
|
|
|
bool
|
|
nsCSSExpandedDataBlock::DoTransferFromBlock(nsCSSExpandedDataBlock& aFromBlock,
|
|
nsCSSProperty aPropID,
|
|
bool aIsImportant,
|
|
bool aOverrideImportant,
|
|
bool aMustCallValueAppended,
|
|
css::Declaration* aDeclaration)
|
|
{
|
|
bool changed = false;
|
|
NS_ABORT_IF_FALSE(aFromBlock.HasPropertyBit(aPropID), "oops");
|
|
if (aIsImportant) {
|
|
if (!HasImportantBit(aPropID))
|
|
changed = true;
|
|
SetImportantBit(aPropID);
|
|
} else {
|
|
if (HasImportantBit(aPropID)) {
|
|
// When parsing a declaration block, an !important declaration
|
|
// is not overwritten by an ordinary declaration of the same
|
|
// property later in the block. However, CSSOM manipulations
|
|
// come through here too, and in that case we do want to
|
|
// overwrite the property.
|
|
if (!aOverrideImportant) {
|
|
aFromBlock.ClearLonghandProperty(aPropID);
|
|
return false;
|
|
}
|
|
changed = true;
|
|
ClearImportantBit(aPropID);
|
|
}
|
|
}
|
|
|
|
if (aMustCallValueAppended || !HasPropertyBit(aPropID)) {
|
|
aDeclaration->ValueAppended(aPropID);
|
|
}
|
|
|
|
SetPropertyBit(aPropID);
|
|
aFromBlock.ClearPropertyBit(aPropID);
|
|
|
|
/*
|
|
* Save needless copying and allocation by calling the destructor in
|
|
* the destination, copying memory directly, and then using placement
|
|
* new.
|
|
*/
|
|
changed |= MoveValue(aFromBlock.PropertyAt(aPropID), PropertyAt(aPropID));
|
|
return changed;
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::MapRuleInfoInto(nsCSSProperty aPropID,
|
|
nsRuleData* aRuleData) const
|
|
{
|
|
MOZ_ASSERT(!nsCSSProps::IsShorthand(aPropID));
|
|
|
|
const nsCSSValue* src = PropertyAt(aPropID);
|
|
MOZ_ASSERT(src->GetUnit() != eCSSUnit_Null);
|
|
|
|
nsCSSProperty physicalProp = aPropID;
|
|
if (nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_LOGICAL)) {
|
|
EnsurePhysicalProperty(physicalProp, aRuleData);
|
|
aRuleData->mCanStoreInRuleTree = false;
|
|
}
|
|
|
|
nsCSSValue* dest = aRuleData->ValueFor(physicalProp);
|
|
MOZ_ASSERT(dest->GetUnit() == eCSSUnit_TokenStream &&
|
|
dest->GetTokenStreamValue()->mPropertyID == aPropID);
|
|
|
|
MapSinglePropertyInto(physicalProp, src, dest, aRuleData);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsCSSExpandedDataBlock::DoAssertInitialState()
|
|
{
|
|
mPropertiesSet.AssertIsEmpty("not initial state");
|
|
mPropertiesImportant.AssertIsEmpty("not initial state");
|
|
|
|
for (uint32_t i = 0; i < eCSSProperty_COUNT_no_shorthands; ++i) {
|
|
nsCSSProperty prop = nsCSSProperty(i);
|
|
NS_ABORT_IF_FALSE(PropertyAt(prop)->GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
}
|
|
}
|
|
#endif
|