2538 lines
87 KiB
C++
2538 lines
87 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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/*
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* the container for the style sheets that apply to a presentation, and
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* the internal API that the style system exposes for creating (and
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* potentially re-creating) style contexts
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*/
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#include "nsStyleSet.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/EffectCompositor.h"
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#include "mozilla/EnumeratedRange.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/RuleProcessorCache.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "nsIDocumentInlines.h"
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#include "nsRuleWalker.h"
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#include "nsStyleContext.h"
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#include "mozilla/css/StyleRule.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSPseudoElements.h"
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#include "nsCSSRuleProcessor.h"
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#include "nsDataHashtable.h"
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#include "nsIContent.h"
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#include "nsRuleData.h"
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#include "nsRuleProcessorData.h"
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#include "nsAnimationManager.h"
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#include "nsStyleSheetService.h"
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#include "mozilla/dom/Element.h"
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#include "GeckoProfiler.h"
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#include "nsHTMLCSSStyleSheet.h"
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#include "nsHTMLStyleSheet.h"
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#include "SVGAttrAnimationRuleProcessor.h"
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#include "nsCSSRules.h"
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#include "nsPrintfCString.h"
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#include "nsIFrame.h"
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#include "mozilla/RestyleManagerHandle.h"
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#include "mozilla/RestyleManagerHandleInlines.h"
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#include "nsQueryObject.h"
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#include <inttypes.h>
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS(nsEmptyStyleRule, nsIStyleRule)
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/* virtual */ void
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nsEmptyStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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}
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/* virtual */ bool
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nsEmptyStyleRule::MightMapInheritedStyleData()
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{
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return false;
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}
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/* virtual */ bool
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nsEmptyStyleRule::GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
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nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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}
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#ifdef DEBUG
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/* virtual */ void
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nsEmptyStyleRule::List(FILE* out, int32_t aIndent) const
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{
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nsAutoCString indentStr;
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for (int32_t index = aIndent; --index >= 0; ) {
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indentStr.AppendLiteral(" ");
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}
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fprintf_stderr(out, "%s[empty style rule] {}\n", indentStr.get());
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}
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#endif
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NS_IMPL_ISUPPORTS(nsInitialStyleRule, nsIStyleRule)
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/* virtual */ void
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nsInitialStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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// Iterate over the property groups
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for (nsStyleStructID sid = nsStyleStructID(0);
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sid < nsStyleStructID_Length; sid = nsStyleStructID(sid + 1)) {
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if (aRuleData->mSIDs & (1 << sid)) {
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// Iterate over nsCSSValues within the property group
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nsCSSValue * const value_start =
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aRuleData->mValueStorage + aRuleData->mValueOffsets[sid];
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for (nsCSSValue *value = value_start,
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*value_end = value + nsCSSProps::PropertyCountInStruct(sid);
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value != value_end; ++value) {
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// If MathML is disabled take care not to set MathML properties (or we
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// will trigger assertions in nsRuleNode)
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if (sid == eStyleStruct_Font &&
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!aRuleData->mPresContext->Document()->GetMathMLEnabled()) {
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size_t index = value - value_start;
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if (index == nsCSSProps::PropertyIndexInStruct(
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eCSSProperty_script_level) ||
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index == nsCSSProps::PropertyIndexInStruct(
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eCSSProperty_script_size_multiplier) ||
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index == nsCSSProps::PropertyIndexInStruct(
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eCSSProperty_script_min_size) ||
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index == nsCSSProps::PropertyIndexInStruct(
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eCSSProperty_math_variant) ||
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index == nsCSSProps::PropertyIndexInStruct(
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eCSSProperty_math_display)) {
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continue;
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}
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}
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if (value->GetUnit() == eCSSUnit_Null) {
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value->SetInitialValue();
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}
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}
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}
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}
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}
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/* virtual */ bool
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nsInitialStyleRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsInitialStyleRule::GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
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nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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}
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#ifdef DEBUG
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/* virtual */ void
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nsInitialStyleRule::List(FILE* out, int32_t aIndent) const
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{
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nsAutoCString indentStr;
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for (int32_t index = aIndent; --index >= 0; ) {
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indentStr.AppendLiteral(" ");
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}
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fprintf_stderr(out, "%s[initial style rule] {}\n", indentStr.get());
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}
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#endif
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NS_IMPL_ISUPPORTS(nsDisableTextZoomStyleRule, nsIStyleRule)
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/* virtual */ void
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nsDisableTextZoomStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (!(aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Font)))
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return;
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nsCSSValue* value = aRuleData->ValueForTextZoom();
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if (value->GetUnit() == eCSSUnit_Null)
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value->SetNoneValue();
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}
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/* virtual */ bool
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nsDisableTextZoomStyleRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsDisableTextZoomStyleRule::
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GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty, nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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}
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#ifdef DEBUG
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/* virtual */ void
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nsDisableTextZoomStyleRule::List(FILE* out, int32_t aIndent) const
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{
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nsAutoCString indentStr;
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for (int32_t index = aIndent; --index >= 0; ) {
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indentStr.AppendLiteral(" ");
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}
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fprintf_stderr(out, "%s[disable text zoom style rule] {}\n", indentStr.get());
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}
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#endif
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static const SheetType gCSSSheetTypes[] = {
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// From lowest to highest in cascading order.
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SheetType::Agent,
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SheetType::User,
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SheetType::Doc,
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SheetType::ScopedDoc,
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SheetType::Override
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};
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/* static */ bool
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nsStyleSet::IsCSSSheetType(SheetType aSheetType)
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{
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for (SheetType type : gCSSSheetTypes) {
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if (type == aSheetType) {
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return true;
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}
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}
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return false;
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}
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nsStyleSet::nsStyleSet()
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: mRuleTree(nullptr),
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mBatching(0),
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mInShutdown(false),
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mInGC(false),
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mAuthorStyleDisabled(false),
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mInReconstruct(false),
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mInitFontFeatureValuesLookup(true),
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mNeedsRestyleAfterEnsureUniqueInner(false),
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mDirty(0),
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mRootStyleContextCount(0),
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#ifdef DEBUG
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mOldRootNode(nullptr),
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#endif
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mUnusedRuleNodeCount(0)
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{
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}
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nsStyleSet::~nsStyleSet()
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{
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for (SheetType type : gCSSSheetTypes) {
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for (CSSStyleSheet* sheet : mSheets[type]) {
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sheet->DropStyleSet(this);
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}
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}
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// drop reference to cached rule processors
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nsCSSRuleProcessor* rp;
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rp = static_cast<nsCSSRuleProcessor*>(mRuleProcessors[SheetType::Agent].get());
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if (rp) {
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MOZ_ASSERT(rp->IsShared());
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rp->ReleaseStyleSetRef();
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}
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rp = static_cast<nsCSSRuleProcessor*>(mRuleProcessors[SheetType::User].get());
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if (rp) {
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MOZ_ASSERT(rp->IsShared());
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rp->ReleaseStyleSetRef();
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}
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}
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size_t
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nsStyleSet::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
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{
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size_t n = aMallocSizeOf(this);
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for (SheetType type : MakeEnumeratedRange(SheetType::Count)) {
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if (mRuleProcessors[type]) {
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bool shared = false;
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if (type == SheetType::Agent || type == SheetType::User) {
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// The only two origins we consider caching rule processors for.
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nsCSSRuleProcessor* rp =
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static_cast<nsCSSRuleProcessor*>(mRuleProcessors[type].get());
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shared = rp->IsShared();
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}
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if (!shared) {
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n += mRuleProcessors[type]->SizeOfIncludingThis(aMallocSizeOf);
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}
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}
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// We don't own the sheets (either the nsLayoutStyleSheetCache singleton
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// or our document owns them).
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n += mSheets[type].ShallowSizeOfExcludingThis(aMallocSizeOf);
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}
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for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); i++) {
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n += mScopedDocSheetRuleProcessors[i]->SizeOfIncludingThis(aMallocSizeOf);
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}
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n += mScopedDocSheetRuleProcessors.ShallowSizeOfExcludingThis(aMallocSizeOf);
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return n;
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}
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void
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nsStyleSet::Init(nsPresContext *aPresContext)
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{
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mFirstLineRule = new nsEmptyStyleRule;
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mFirstLetterRule = new nsEmptyStyleRule;
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mPlaceholderRule = new nsEmptyStyleRule;
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mDisableTextZoomStyleRule = new nsDisableTextZoomStyleRule;
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mRuleTree = nsRuleNode::CreateRootNode(aPresContext);
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// Make an explicit GatherRuleProcessors call for the levels that
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// don't have style sheets. The other levels will have their calls
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// triggered by DirtyRuleProcessors.
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GatherRuleProcessors(SheetType::PresHint);
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GatherRuleProcessors(SheetType::SVGAttrAnimation);
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GatherRuleProcessors(SheetType::StyleAttr);
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GatherRuleProcessors(SheetType::Animation);
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GatherRuleProcessors(SheetType::Transition);
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}
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nsresult
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nsStyleSet::BeginReconstruct()
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{
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NS_ASSERTION(!mInReconstruct, "Unmatched begin/end?");
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NS_ASSERTION(mRuleTree, "Reconstructing before first construction?");
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mInReconstruct = true;
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// Clear any ArenaRefPtr-managed style contexts, as we don't want them
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// held on to after the rule tree has been reconstructed.
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PresContext()->PresShell()->ClearArenaRefPtrs(eArenaObjectID_nsStyleContext);
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#ifdef DEBUG
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MOZ_ASSERT(!mOldRootNode);
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mOldRootNode = mRuleTree;
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#endif
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// Create a new rule tree root, dropping the reference to our old rule tree.
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// After reconstruction, we will re-enable GC, and allow everything to be
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// collected.
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mRuleTree = nsRuleNode::CreateRootNode(mRuleTree->PresContext());
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return NS_OK;
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}
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void
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nsStyleSet::EndReconstruct()
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{
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NS_ASSERTION(mInReconstruct, "Unmatched begin/end?");
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mInReconstruct = false;
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GCRuleTrees();
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}
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typedef nsDataHashtable<nsPtrHashKey<nsINode>, uint32_t> ScopeDepthCache;
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// Returns the depth of a style scope element, with 1 being the depth of
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// a style scope element that has no ancestor style scope elements. The
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// depth does not count intervening non-scope elements.
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static uint32_t
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GetScopeDepth(nsINode* aScopeElement, ScopeDepthCache& aCache)
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{
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nsINode* parent = aScopeElement->GetParent();
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if (!parent || !parent->IsElementInStyleScope()) {
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return 1;
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}
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uint32_t depth = aCache.Get(aScopeElement);
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if (!depth) {
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for (nsINode* n = parent; n; n = n->GetParent()) {
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if (n->IsScopedStyleRoot()) {
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depth = GetScopeDepth(n, aCache) + 1;
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aCache.Put(aScopeElement, depth);
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break;
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}
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}
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}
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return depth;
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}
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struct ScopedSheetOrder
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{
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CSSStyleSheet* mSheet;
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uint32_t mDepth;
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uint32_t mOrder;
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bool operator==(const ScopedSheetOrder& aRHS) const
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{
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return mDepth == aRHS.mDepth &&
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mOrder == aRHS.mOrder;
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}
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bool operator<(const ScopedSheetOrder& aRHS) const
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{
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if (mDepth != aRHS.mDepth) {
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return mDepth < aRHS.mDepth;
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}
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return mOrder < aRHS.mOrder;
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}
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};
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// Sorts aSheets such that style sheets for ancestor scopes come
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// before those for descendant scopes, and with sheets for a single
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// scope in document order.
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static void
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SortStyleSheetsByScope(nsTArray<CSSStyleSheet*>& aSheets)
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{
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uint32_t n = aSheets.Length();
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if (n == 1) {
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return;
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}
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ScopeDepthCache cache;
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nsTArray<ScopedSheetOrder> sheets;
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sheets.SetLength(n);
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// For each sheet, record the depth of its scope element and its original
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// document order.
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for (uint32_t i = 0; i < n; i++) {
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sheets[i].mSheet = aSheets[i];
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sheets[i].mDepth = GetScopeDepth(aSheets[i]->GetScopeElement(), cache);
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sheets[i].mOrder = i;
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}
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// Sort by depth first, then document order.
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sheets.Sort();
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for (uint32_t i = 0; i < n; i++) {
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aSheets[i] = sheets[i].mSheet;
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}
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}
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nsresult
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nsStyleSet::GatherRuleProcessors(SheetType aType)
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{
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NS_ENSURE_FALSE(mInShutdown, NS_ERROR_FAILURE);
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// We might be in GatherRuleProcessors because we are dropping a sheet,
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// resulting in an nsCSSSelector being destroyed. Tell the
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// RestyleManager for each document we're used in so that they can
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// drop any nsCSSSelector pointers (used for eRestyle_SomeDescendants)
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// in their mPendingRestyles.
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if (IsCSSSheetType(aType)) {
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ClearSelectors();
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}
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nsCOMPtr<nsIStyleRuleProcessor> oldRuleProcessor(mRuleProcessors[aType]);
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nsTArray<nsCOMPtr<nsIStyleRuleProcessor>> oldScopedDocRuleProcessors;
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if (aType == SheetType::Agent || aType == SheetType::User) {
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// drop reference to cached rule processor
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nsCSSRuleProcessor* rp =
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static_cast<nsCSSRuleProcessor*>(mRuleProcessors[aType].get());
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if (rp) {
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MOZ_ASSERT(rp->IsShared());
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rp->ReleaseStyleSetRef();
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}
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}
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mRuleProcessors[aType] = nullptr;
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if (aType == SheetType::ScopedDoc) {
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for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); i++) {
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nsIStyleRuleProcessor* processor = mScopedDocSheetRuleProcessors[i].get();
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Element* scope =
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static_cast<nsCSSRuleProcessor*>(processor)->GetScopeElement();
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scope->ClearIsScopedStyleRoot();
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}
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// Clear mScopedDocSheetRuleProcessors, but save it.
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oldScopedDocRuleProcessors.SwapElements(mScopedDocSheetRuleProcessors);
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}
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if (mAuthorStyleDisabled && (aType == SheetType::Doc ||
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aType == SheetType::ScopedDoc ||
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aType == SheetType::StyleAttr)) {
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// Don't regather if this level is disabled. Note that we gather
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// preshint sheets no matter what, but then skip them for some
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// elements later if mAuthorStyleDisabled.
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return NS_OK;
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}
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switch (aType) {
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// levels that do not contain CSS style sheets
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case SheetType::Animation:
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MOZ_ASSERT(mSheets[aType].IsEmpty());
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mRuleProcessors[aType] = PresContext()->EffectCompositor()->
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RuleProcessor(EffectCompositor::CascadeLevel::Animations);
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return NS_OK;
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case SheetType::Transition:
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MOZ_ASSERT(mSheets[aType].IsEmpty());
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mRuleProcessors[aType] = PresContext()->EffectCompositor()->
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RuleProcessor(EffectCompositor::CascadeLevel::Transitions);
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return NS_OK;
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case SheetType::StyleAttr:
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MOZ_ASSERT(mSheets[aType].IsEmpty());
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mRuleProcessors[aType] = PresContext()->Document()->GetInlineStyleSheet();
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return NS_OK;
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case SheetType::PresHint:
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MOZ_ASSERT(mSheets[aType].IsEmpty());
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mRuleProcessors[aType] =
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PresContext()->Document()->GetAttributeStyleSheet();
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return NS_OK;
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case SheetType::SVGAttrAnimation:
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MOZ_ASSERT(mSheets[aType].IsEmpty());
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mRuleProcessors[aType] =
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PresContext()->Document()->GetSVGAttrAnimationRuleProcessor();
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return NS_OK;
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default:
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// keep going
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break;
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}
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MOZ_ASSERT(IsCSSSheetType(aType));
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if (aType == SheetType::ScopedDoc) {
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// Create a rule processor for each scope.
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uint32_t count = mSheets[SheetType::ScopedDoc].Length();
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if (count) {
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// Gather the scoped style sheets into an array as
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// CSSStyleSheets, and mark all of their scope elements
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// as scoped style roots.
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nsTArray<CSSStyleSheet*> sheets(count);
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for (CSSStyleSheet* sheet : mSheets[SheetType::ScopedDoc]) {
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sheets.AppendElement(sheet);
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Element* scope = sheet->GetScopeElement();
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scope->SetIsScopedStyleRoot();
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}
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|
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// Sort the scoped style sheets so that those for the same scope are
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// adjacent and that ancestor scopes come before descendent scopes.
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SortStyleSheetsByScope(sheets);
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|
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// Put the old scoped rule processors in a hashtable so that we
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|
// can retrieve them efficiently, even in edge cases like the
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// simultaneous removal and addition of a large number of elements
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// with scoped sheets.
|
|
nsDataHashtable<nsPtrHashKey<Element>,
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|
nsCSSRuleProcessor*> oldScopedRuleProcessorHash;
|
|
for (size_t i = oldScopedDocRuleProcessors.Length(); i-- != 0; ) {
|
|
nsCSSRuleProcessor* oldRP =
|
|
static_cast<nsCSSRuleProcessor*>(oldScopedDocRuleProcessors[i].get());
|
|
Element* scope = oldRP->GetScopeElement();
|
|
MOZ_ASSERT(!oldScopedRuleProcessorHash.Get(scope),
|
|
"duplicate rule processors for same scope element?");
|
|
oldScopedRuleProcessorHash.Put(scope, oldRP);
|
|
}
|
|
|
|
uint32_t start = 0, end;
|
|
do {
|
|
// Find the range of style sheets with the same scope.
|
|
Element* scope = sheets[start]->GetScopeElement();
|
|
end = start + 1;
|
|
while (end < count && sheets[end]->GetScopeElement() == scope) {
|
|
end++;
|
|
}
|
|
|
|
scope->SetIsScopedStyleRoot();
|
|
|
|
// Create a rule processor for the scope.
|
|
nsTArray<RefPtr<CSSStyleSheet>> sheetsForScope;
|
|
sheetsForScope.AppendElements(sheets.Elements() + start, end - start);
|
|
nsCSSRuleProcessor* oldRP = oldScopedRuleProcessorHash.Get(scope);
|
|
mScopedDocSheetRuleProcessors.AppendElement
|
|
(new nsCSSRuleProcessor(Move(sheetsForScope), aType, scope, oldRP));
|
|
|
|
start = end;
|
|
} while (start < count);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
if (!mSheets[aType].IsEmpty()) {
|
|
switch (aType) {
|
|
case SheetType::Agent:
|
|
case SheetType::User: {
|
|
// levels containing non-scoped CSS style sheets whose rule processors
|
|
// we want to re-use
|
|
nsTArray<CSSStyleSheet*> sheets(mSheets[aType].Length());
|
|
for (CSSStyleSheet* sheet : mSheets[aType]) {
|
|
sheets.AppendElement(sheet);
|
|
}
|
|
nsCSSRuleProcessor* rp =
|
|
RuleProcessorCache::GetRuleProcessor(sheets, PresContext());
|
|
if (!rp) {
|
|
rp = new nsCSSRuleProcessor(mSheets[aType], aType, nullptr,
|
|
static_cast<nsCSSRuleProcessor*>(
|
|
oldRuleProcessor.get()),
|
|
true /* aIsShared */);
|
|
nsTArray<css::DocumentRule*> documentRules;
|
|
nsDocumentRuleResultCacheKey cacheKey;
|
|
rp->TakeDocumentRulesAndCacheKey(PresContext(),
|
|
documentRules, cacheKey);
|
|
RuleProcessorCache::PutRuleProcessor(sheets,
|
|
Move(documentRules),
|
|
cacheKey, rp);
|
|
}
|
|
mRuleProcessors[aType] = rp;
|
|
rp->AddStyleSetRef();
|
|
break;
|
|
}
|
|
case SheetType::Doc:
|
|
case SheetType::Override: {
|
|
// levels containing non-scoped CSS stylesheets whose rule processors
|
|
// we don't want to re-use
|
|
mRuleProcessors[aType] =
|
|
new nsCSSRuleProcessor(mSheets[aType], aType, nullptr,
|
|
static_cast<nsCSSRuleProcessor*>(
|
|
oldRuleProcessor.get()));
|
|
} break;
|
|
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("non-CSS sheet types should be handled above");
|
|
break;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::AppendStyleSheet(SheetType aType, CSSStyleSheet* aSheet)
|
|
{
|
|
NS_PRECONDITION(aSheet, "null arg");
|
|
NS_ASSERTION(aSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
bool present = mSheets[aType].RemoveElement(aSheet);
|
|
mSheets[aType].AppendElement(aSheet);
|
|
|
|
if (!present && IsCSSSheetType(aType)) {
|
|
aSheet->AddStyleSet(this);
|
|
}
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::PrependStyleSheet(SheetType aType, CSSStyleSheet* aSheet)
|
|
{
|
|
NS_PRECONDITION(aSheet, "null arg");
|
|
NS_ASSERTION(aSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
bool present = mSheets[aType].RemoveElement(aSheet);
|
|
mSheets[aType].InsertElementAt(0, aSheet);
|
|
|
|
if (!present && IsCSSSheetType(aType)) {
|
|
aSheet->AddStyleSet(this);
|
|
}
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::RemoveStyleSheet(SheetType aType, CSSStyleSheet* aSheet)
|
|
{
|
|
NS_PRECONDITION(aSheet, "null arg");
|
|
NS_ASSERTION(aSheet->IsComplete(),
|
|
"Incomplete sheet being removed from style set");
|
|
if (mSheets[aType].RemoveElement(aSheet)) {
|
|
if (IsCSSSheetType(aType)) {
|
|
aSheet->DropStyleSet(this);
|
|
}
|
|
}
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::ReplaceSheets(SheetType aType,
|
|
const nsTArray<RefPtr<CSSStyleSheet>>& aNewSheets)
|
|
{
|
|
bool cssSheetType = IsCSSSheetType(aType);
|
|
if (cssSheetType) {
|
|
for (CSSStyleSheet* sheet : mSheets[aType]) {
|
|
sheet->DropStyleSet(this);
|
|
}
|
|
}
|
|
|
|
mSheets[aType].Clear();
|
|
mSheets[aType].AppendElements(aNewSheets);
|
|
|
|
if (cssSheetType) {
|
|
for (CSSStyleSheet* sheet : mSheets[aType]) {
|
|
sheet->AddStyleSet(this);
|
|
}
|
|
}
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::InsertStyleSheetBefore(SheetType aType, CSSStyleSheet* aNewSheet,
|
|
CSSStyleSheet* aReferenceSheet)
|
|
{
|
|
NS_PRECONDITION(aNewSheet && aReferenceSheet, "null arg");
|
|
NS_ASSERTION(aNewSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
|
|
bool present = mSheets[aType].RemoveElement(aNewSheet);
|
|
int32_t idx = mSheets[aType].IndexOf(aReferenceSheet);
|
|
if (idx < 0)
|
|
return NS_ERROR_INVALID_ARG;
|
|
|
|
mSheets[aType].InsertElementAt(idx, aNewSheet);
|
|
|
|
if (!present && IsCSSSheetType(aType)) {
|
|
aNewSheet->AddStyleSet(this);
|
|
}
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
static inline uint32_t
|
|
DirtyBit(SheetType aType)
|
|
{
|
|
return 1 << uint32_t(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::DirtyRuleProcessors(SheetType aType)
|
|
{
|
|
if (!mBatching)
|
|
return GatherRuleProcessors(aType);
|
|
|
|
mDirty |= DirtyBit(aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::GetAuthorStyleDisabled() const
|
|
{
|
|
return mAuthorStyleDisabled;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::SetAuthorStyleDisabled(bool aStyleDisabled)
|
|
{
|
|
if (aStyleDisabled == !mAuthorStyleDisabled) {
|
|
mAuthorStyleDisabled = aStyleDisabled;
|
|
BeginUpdate();
|
|
mDirty |= DirtyBit(SheetType::Doc) |
|
|
DirtyBit(SheetType::ScopedDoc) |
|
|
DirtyBit(SheetType::StyleAttr);
|
|
return EndUpdate();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// -------- Doc Sheets
|
|
|
|
nsresult
|
|
nsStyleSet::AddDocStyleSheet(CSSStyleSheet* aSheet, nsIDocument* aDocument)
|
|
{
|
|
NS_PRECONDITION(aSheet && aDocument, "null arg");
|
|
NS_ASSERTION(aSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
|
|
SheetType type = aSheet->GetScopeElement() ?
|
|
SheetType::ScopedDoc :
|
|
SheetType::Doc;
|
|
nsTArray<RefPtr<CSSStyleSheet>>& sheets = mSheets[type];
|
|
|
|
bool present = sheets.RemoveElement(aSheet);
|
|
|
|
size_t index = aDocument->FindDocStyleSheetInsertionPoint(sheets, *aSheet);
|
|
sheets.InsertElementAt(index, aSheet);
|
|
|
|
if (!present) {
|
|
aSheet->AddStyleSet(this);
|
|
}
|
|
|
|
return DirtyRuleProcessors(type);
|
|
}
|
|
|
|
void
|
|
nsStyleSet::AppendAllXBLStyleSheets(nsTArray<mozilla::CSSStyleSheet*>& aArray) const
|
|
{
|
|
if (mBindingManager) {
|
|
// XXXheycam stylo: AppendAllSheets will need to be able to return either
|
|
// CSSStyleSheets or ServoStyleSheets, on request (and then here requesting
|
|
// CSSStyleSheets).
|
|
AutoTArray<StyleSheet*, 32> sheets;
|
|
mBindingManager->AppendAllSheets(sheets);
|
|
for (StyleSheet* handle : sheets) {
|
|
MOZ_ASSERT(handle->IsGecko(), "stylo: AppendAllSheets shouldn't give us "
|
|
"ServoStyleSheets yet");
|
|
aArray.AppendElement(handle->AsGecko());
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::RemoveDocStyleSheet(CSSStyleSheet* aSheet)
|
|
{
|
|
bool isScoped = aSheet->GetScopeElement();
|
|
return RemoveStyleSheet(isScoped ? SheetType::ScopedDoc : SheetType::Doc,
|
|
aSheet);
|
|
}
|
|
|
|
// Batching
|
|
void
|
|
nsStyleSet::BeginUpdate()
|
|
{
|
|
++mBatching;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::EndUpdate()
|
|
{
|
|
NS_ASSERTION(mBatching > 0, "Unbalanced EndUpdate");
|
|
if (--mBatching) {
|
|
// We're not completely done yet.
|
|
return NS_OK;
|
|
}
|
|
|
|
for (SheetType type : MakeEnumeratedRange(SheetType::Count)) {
|
|
if (mDirty & DirtyBit(type)) {
|
|
nsresult rv = GatherRuleProcessors(type);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
mDirty = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
template<class T>
|
|
static bool
|
|
EnumRulesMatching(nsIStyleRuleProcessor* aProcessor, void* aData)
|
|
{
|
|
T* data = static_cast<T*>(aData);
|
|
aProcessor->RulesMatching(data);
|
|
return true;
|
|
}
|
|
|
|
static inline bool
|
|
IsMoreSpecificThanAnimation(nsRuleNode *aRuleNode)
|
|
{
|
|
return !aRuleNode->IsRoot() &&
|
|
(aRuleNode->GetLevel() == SheetType::Transition ||
|
|
aRuleNode->IsImportantRule());
|
|
}
|
|
|
|
static nsIStyleRule*
|
|
GetAnimationRule(nsRuleNode *aRuleNode)
|
|
{
|
|
nsRuleNode *n = aRuleNode;
|
|
while (IsMoreSpecificThanAnimation(n)) {
|
|
n = n->GetParent();
|
|
}
|
|
|
|
if (n->IsRoot() || n->GetLevel() != SheetType::Animation) {
|
|
return nullptr;
|
|
}
|
|
|
|
return n->GetRule();
|
|
}
|
|
|
|
static nsRuleNode*
|
|
ReplaceAnimationRule(nsRuleNode *aOldRuleNode,
|
|
nsIStyleRule *aOldAnimRule,
|
|
nsIStyleRule *aNewAnimRule)
|
|
{
|
|
nsTArray<nsRuleNode*> moreSpecificNodes;
|
|
|
|
nsRuleNode *n = aOldRuleNode;
|
|
while (IsMoreSpecificThanAnimation(n)) {
|
|
moreSpecificNodes.AppendElement(n);
|
|
n = n->GetParent();
|
|
}
|
|
|
|
if (aOldAnimRule) {
|
|
MOZ_ASSERT(n->GetRule() == aOldAnimRule, "wrong rule");
|
|
MOZ_ASSERT(n->GetLevel() == SheetType::Animation,
|
|
"wrong level");
|
|
n = n->GetParent();
|
|
}
|
|
|
|
MOZ_ASSERT(!IsMoreSpecificThanAnimation(n) &&
|
|
(n->IsRoot() || n->GetLevel() != SheetType::Animation),
|
|
"wrong level");
|
|
|
|
if (aNewAnimRule) {
|
|
n = n->Transition(aNewAnimRule, SheetType::Animation, false);
|
|
n->SetIsAnimationRule();
|
|
}
|
|
|
|
for (uint32_t i = moreSpecificNodes.Length(); i-- != 0; ) {
|
|
nsRuleNode *oldNode = moreSpecificNodes[i];
|
|
n = n->Transition(oldNode->GetRule(), oldNode->GetLevel(),
|
|
oldNode->IsImportantRule());
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
/**
|
|
* |GetContext| implements sharing of style contexts (not just the data
|
|
* on the rule nodes) between siblings and cousins of the same
|
|
* generation. (It works for cousins of the same generation since
|
|
* |aParentContext| could itself be a shared context.)
|
|
*/
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::GetContext(nsStyleContext* aParentContext,
|
|
nsRuleNode* aRuleNode,
|
|
// aVisitedRuleNode may be null; if it is null
|
|
// it means that we don't need to force creation
|
|
// of a StyleIfVisited. (But if we make one
|
|
// because aParentContext has one, then aRuleNode
|
|
// should be used.)
|
|
nsRuleNode* aVisitedRuleNode,
|
|
nsIAtom* aPseudoTag,
|
|
CSSPseudoElementType aPseudoType,
|
|
Element* aElementForAnimation,
|
|
uint32_t aFlags)
|
|
{
|
|
NS_PRECONDITION((!aPseudoTag &&
|
|
aPseudoType ==
|
|
CSSPseudoElementType::NotPseudo) ||
|
|
(aPseudoTag &&
|
|
nsCSSPseudoElements::GetPseudoType(
|
|
aPseudoTag, CSSEnabledState::eIgnoreEnabledState) ==
|
|
aPseudoType),
|
|
"Pseudo mismatch");
|
|
|
|
if (aVisitedRuleNode == aRuleNode) {
|
|
// No need to force creation of a visited style in this case.
|
|
aVisitedRuleNode = nullptr;
|
|
}
|
|
|
|
// Ensure |aVisitedRuleNode != nullptr| corresponds to the need to
|
|
// create an if-visited style context, and that in that case, we have
|
|
// parentIfVisited set correctly.
|
|
nsStyleContext *parentIfVisited =
|
|
aParentContext ? aParentContext->GetStyleIfVisited() : nullptr;
|
|
if (parentIfVisited) {
|
|
if (!aVisitedRuleNode) {
|
|
aVisitedRuleNode = aRuleNode;
|
|
}
|
|
} else {
|
|
if (aVisitedRuleNode) {
|
|
parentIfVisited = aParentContext;
|
|
}
|
|
}
|
|
|
|
if (aFlags & eIsLink) {
|
|
// If this node is a link, we want its visited's style context's
|
|
// parent to be the regular style context of its parent, because
|
|
// only the visitedness of the relevant link should influence style.
|
|
parentIfVisited = aParentContext;
|
|
}
|
|
|
|
bool relevantLinkVisited = (aFlags & eIsLink) ?
|
|
(aFlags & eIsVisitedLink) :
|
|
(aParentContext && aParentContext->RelevantLinkVisited());
|
|
|
|
RefPtr<nsStyleContext> result;
|
|
if (aParentContext)
|
|
result = aParentContext->FindChildWithRules(aPseudoTag, aRuleNode,
|
|
aVisitedRuleNode,
|
|
relevantLinkVisited);
|
|
|
|
if (!result) {
|
|
// |aVisitedRuleNode| may have a ref-count of zero since we are yet
|
|
// to create the style context that will hold an owning reference to it.
|
|
// As a result, we need to make sure it stays alive until that point
|
|
// in case something in the first call to NS_NewStyleContext triggers a
|
|
// GC sweep of rule nodes.
|
|
RefPtr<nsRuleNode> kungFuDeathGrip{aVisitedRuleNode};
|
|
|
|
result = NS_NewStyleContext(aParentContext, aPseudoTag, aPseudoType,
|
|
aRuleNode,
|
|
aFlags & eSkipParentDisplayBasedStyleFixup);
|
|
if (aVisitedRuleNode) {
|
|
RefPtr<nsStyleContext> resultIfVisited =
|
|
NS_NewStyleContext(parentIfVisited, aPseudoTag, aPseudoType,
|
|
aVisitedRuleNode,
|
|
aFlags & eSkipParentDisplayBasedStyleFixup);
|
|
resultIfVisited->SetIsStyleIfVisited();
|
|
result->SetStyleIfVisited(resultIfVisited.forget());
|
|
|
|
if (relevantLinkVisited) {
|
|
result->AddStyleBit(NS_STYLE_RELEVANT_LINK_VISITED);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERTION(result->GetPseudoType() == aPseudoType, "Unexpected type");
|
|
NS_ASSERTION(result->GetPseudo() == aPseudoTag, "Unexpected pseudo");
|
|
}
|
|
|
|
if (aFlags & eDoAnimation) {
|
|
|
|
nsIStyleRule *oldAnimRule = GetAnimationRule(aRuleNode);
|
|
nsIStyleRule *animRule = nullptr;
|
|
|
|
// Ignore animations for print or print preview, and for elements
|
|
// that are not attached to the document tree.
|
|
if (PresContext()->IsDynamic() &&
|
|
aElementForAnimation->IsInComposedDoc()) {
|
|
// Update CSS animations in case the animation-name has just changed.
|
|
PresContext()->AnimationManager()->UpdateAnimations(result,
|
|
aElementForAnimation);
|
|
PresContext()->EffectCompositor()->UpdateEffectProperties(
|
|
result, aElementForAnimation, result->GetPseudoType());
|
|
|
|
animRule = PresContext()->EffectCompositor()->
|
|
GetAnimationRule(aElementForAnimation,
|
|
result->GetPseudoType(),
|
|
EffectCompositor::CascadeLevel::Animations,
|
|
result);
|
|
}
|
|
|
|
MOZ_ASSERT(result->RuleNode() == aRuleNode,
|
|
"unexpected rule node");
|
|
MOZ_ASSERT(!result->GetStyleIfVisited() == !aVisitedRuleNode,
|
|
"unexpected visited rule node");
|
|
MOZ_ASSERT(!aVisitedRuleNode ||
|
|
result->GetStyleIfVisited()->RuleNode() == aVisitedRuleNode,
|
|
"unexpected visited rule node");
|
|
MOZ_ASSERT(!aVisitedRuleNode ||
|
|
oldAnimRule == GetAnimationRule(aVisitedRuleNode),
|
|
"animation rule mismatch between rule nodes");
|
|
if (oldAnimRule != animRule) {
|
|
nsRuleNode *ruleNode =
|
|
ReplaceAnimationRule(aRuleNode, oldAnimRule, animRule);
|
|
nsRuleNode *visitedRuleNode = aVisitedRuleNode
|
|
? ReplaceAnimationRule(aVisitedRuleNode, oldAnimRule, animRule)
|
|
: nullptr;
|
|
MOZ_ASSERT(!visitedRuleNode ||
|
|
GetAnimationRule(ruleNode) ==
|
|
GetAnimationRule(visitedRuleNode),
|
|
"animation rule mismatch between rule nodes");
|
|
result = GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
aPseudoTag, aPseudoType, nullptr,
|
|
aFlags & ~eDoAnimation);
|
|
}
|
|
}
|
|
|
|
if (aElementForAnimation &&
|
|
aElementForAnimation->IsHTMLElement(nsGkAtoms::body) &&
|
|
aPseudoType == CSSPseudoElementType::NotPseudo &&
|
|
PresContext()->CompatibilityMode() == eCompatibility_NavQuirks) {
|
|
nsIDocument* doc = aElementForAnimation->GetUncomposedDoc();
|
|
if (doc && doc->GetBodyElement() == aElementForAnimation) {
|
|
// Update the prescontext's body color
|
|
PresContext()->SetBodyTextColor(result->StyleColor()->mColor);
|
|
}
|
|
}
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
void
|
|
nsStyleSet::AddImportantRules(nsRuleNode* aCurrLevelNode,
|
|
nsRuleNode* aLastPrevLevelNode,
|
|
nsRuleWalker* aRuleWalker)
|
|
{
|
|
NS_ASSERTION(aCurrLevelNode &&
|
|
aCurrLevelNode != aLastPrevLevelNode, "How did we get here?");
|
|
|
|
AutoTArray<nsIStyleRule*, 16> importantRules;
|
|
for (nsRuleNode *node = aCurrLevelNode; node != aLastPrevLevelNode;
|
|
node = node->GetParent()) {
|
|
// We guarantee that we never walk the root node here, so no need
|
|
// to null-check GetRule(). Furthermore, it must be a CSS rule.
|
|
NS_ASSERTION(RefPtr<css::Declaration>(do_QueryObject(node->GetRule())),
|
|
"Unexpected non-CSS rule");
|
|
|
|
nsIStyleRule* impRule =
|
|
static_cast<css::Declaration*>(node->GetRule())->GetImportantStyleData();
|
|
if (impRule)
|
|
importantRules.AppendElement(impRule);
|
|
}
|
|
|
|
NS_ASSERTION(importantRules.Length() != 0,
|
|
"Why did we think there were important rules?");
|
|
|
|
for (uint32_t i = importantRules.Length(); i-- != 0; ) {
|
|
aRuleWalker->Forward(importantRules[i]);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsStyleSet::AssertNoImportantRules(nsRuleNode* aCurrLevelNode,
|
|
nsRuleNode* aLastPrevLevelNode)
|
|
{
|
|
if (!aCurrLevelNode)
|
|
return;
|
|
|
|
for (nsRuleNode *node = aCurrLevelNode; node != aLastPrevLevelNode;
|
|
node = node->GetParent()) {
|
|
RefPtr<css::Declaration> declaration(do_QueryObject(node->GetRule()));
|
|
NS_ASSERTION(declaration, "Unexpected non-CSS rule");
|
|
|
|
NS_ASSERTION(!declaration->GetImportantStyleData(),
|
|
"Unexpected important style source");
|
|
}
|
|
}
|
|
|
|
void
|
|
nsStyleSet::AssertNoCSSRules(nsRuleNode* aCurrLevelNode,
|
|
nsRuleNode* aLastPrevLevelNode)
|
|
{
|
|
if (!aCurrLevelNode)
|
|
return;
|
|
|
|
for (nsRuleNode *node = aCurrLevelNode; node != aLastPrevLevelNode;
|
|
node = node->GetParent()) {
|
|
nsIStyleRule *rule = node->GetRule();
|
|
RefPtr<css::Declaration> declaration(do_QueryObject(rule));
|
|
if (declaration) {
|
|
RefPtr<css::StyleRule> cssRule =
|
|
do_QueryObject(declaration->GetOwningRule());
|
|
NS_ASSERTION(!cssRule || !cssRule->Selector(),
|
|
"Unexpected CSS rule");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Enumerate the rules in a way that cares about the order of the rules.
|
|
void
|
|
nsStyleSet::FileRules(nsIStyleRuleProcessor::EnumFunc aCollectorFunc,
|
|
RuleProcessorData* aData, Element* aElement,
|
|
nsRuleWalker* aRuleWalker)
|
|
{
|
|
PROFILER_LABEL("nsStyleSet", "FileRules",
|
|
js::ProfileEntry::Category::CSS);
|
|
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
// Cascading order:
|
|
// [least important]
|
|
// - UA normal rules = Agent normal
|
|
// - User normal rules = User normal
|
|
// - Presentation hints = PresHint normal
|
|
// - SVG Animation (highest pres hint) = SVGAttrAnimation normal
|
|
// - Author normal rules = Document normal
|
|
// - Override normal rules = Override normal
|
|
// - animation rules = Animation normal
|
|
// - Author !important rules = Document !important
|
|
// - Override !important rules = Override !important
|
|
// - User !important rules = User !important
|
|
// - UA !important rules = Agent !important
|
|
// - transition rules = Transition normal
|
|
// [most important]
|
|
|
|
// Save off the last rule before we start walking our agent sheets;
|
|
// this will be either the root or one of the restriction rules.
|
|
nsRuleNode* lastRestrictionRN = aRuleWalker->CurrentNode();
|
|
|
|
aRuleWalker->SetLevel(SheetType::Agent, false, true);
|
|
if (mRuleProcessors[SheetType::Agent])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::Agent], aData);
|
|
nsRuleNode* lastAgentRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantUARules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(SheetType::User, false, true);
|
|
bool skipUserStyles =
|
|
aElement && aElement->IsInNativeAnonymousSubtree();
|
|
if (!skipUserStyles && mRuleProcessors[SheetType::User]) // NOTE: different
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::User], aData);
|
|
nsRuleNode* lastUserRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantUserRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(SheetType::PresHint, false, false);
|
|
if (mRuleProcessors[SheetType::PresHint])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::PresHint], aData);
|
|
|
|
aRuleWalker->SetLevel(SheetType::SVGAttrAnimation, false, false);
|
|
if (mRuleProcessors[SheetType::SVGAttrAnimation])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::SVGAttrAnimation], aData);
|
|
nsRuleNode* lastSVGAttrAnimationRN = aRuleWalker->CurrentNode();
|
|
|
|
aRuleWalker->SetLevel(SheetType::Doc, false, true);
|
|
bool cutOffInheritance = false;
|
|
if (mBindingManager && aElement) {
|
|
// We can supply additional document-level sheets that should be walked.
|
|
mBindingManager->WalkRules(aCollectorFunc,
|
|
static_cast<ElementDependentRuleProcessorData*>(aData),
|
|
&cutOffInheritance);
|
|
}
|
|
if (!skipUserStyles && !cutOffInheritance && // NOTE: different
|
|
mRuleProcessors[SheetType::Doc])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::Doc], aData);
|
|
nsRuleNode* lastDocRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantDocRules = !aRuleWalker->GetCheckForImportantRules();
|
|
nsTArray<nsRuleNode*> lastScopedRNs;
|
|
nsTArray<bool> haveImportantScopedRules;
|
|
bool haveAnyImportantScopedRules = false;
|
|
if (!skipUserStyles && !cutOffInheritance &&
|
|
aElement && aElement->IsElementInStyleScope()) {
|
|
lastScopedRNs.SetLength(mScopedDocSheetRuleProcessors.Length());
|
|
haveImportantScopedRules.SetLength(mScopedDocSheetRuleProcessors.Length());
|
|
for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); i++) {
|
|
aRuleWalker->SetLevel(SheetType::ScopedDoc, false, true);
|
|
nsCSSRuleProcessor* processor =
|
|
static_cast<nsCSSRuleProcessor*>(mScopedDocSheetRuleProcessors[i].get());
|
|
aData->mScope = processor->GetScopeElement();
|
|
(*aCollectorFunc)(mScopedDocSheetRuleProcessors[i], aData);
|
|
lastScopedRNs[i] = aRuleWalker->CurrentNode();
|
|
haveImportantScopedRules[i] = !aRuleWalker->GetCheckForImportantRules();
|
|
haveAnyImportantScopedRules = haveAnyImportantScopedRules || haveImportantScopedRules[i];
|
|
}
|
|
aData->mScope = nullptr;
|
|
}
|
|
nsRuleNode* lastScopedRN = aRuleWalker->CurrentNode();
|
|
aRuleWalker->SetLevel(SheetType::StyleAttr, false, true);
|
|
if (mRuleProcessors[SheetType::StyleAttr])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::StyleAttr], aData);
|
|
nsRuleNode* lastStyleAttrRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantStyleAttrRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(SheetType::Override, false, true);
|
|
if (mRuleProcessors[SheetType::Override])
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::Override], aData);
|
|
nsRuleNode* lastOvrRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantOverrideRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
// This needs to match IsMoreSpecificThanAnimation() above.
|
|
aRuleWalker->SetLevel(SheetType::Animation, false, false);
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::Animation], aData);
|
|
|
|
if (haveAnyImportantScopedRules) {
|
|
for (uint32_t i = lastScopedRNs.Length(); i-- != 0; ) {
|
|
aRuleWalker->SetLevel(SheetType::ScopedDoc, true, false);
|
|
nsRuleNode* startRN = lastScopedRNs[i];
|
|
nsRuleNode* endRN = i == 0 ? lastDocRN : lastScopedRNs[i - 1];
|
|
if (haveImportantScopedRules[i]) {
|
|
AddImportantRules(startRN, endRN, aRuleWalker); // scoped
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(startRN, endRN);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastScopedRN, lastDocRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantDocRules) {
|
|
aRuleWalker->SetLevel(SheetType::Doc, true, false);
|
|
AddImportantRules(lastDocRN, lastSVGAttrAnimationRN, aRuleWalker); // doc
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastDocRN, lastSVGAttrAnimationRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantStyleAttrRules) {
|
|
aRuleWalker->SetLevel(SheetType::StyleAttr, true, false);
|
|
AddImportantRules(lastStyleAttrRN, lastScopedRN, aRuleWalker); // style attr
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastStyleAttrRN, lastScopedRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantOverrideRules) {
|
|
aRuleWalker->SetLevel(SheetType::Override, true, false);
|
|
AddImportantRules(lastOvrRN, lastStyleAttrRN, aRuleWalker); // override
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastOvrRN, lastStyleAttrRN);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
AssertNoCSSRules(lastSVGAttrAnimationRN, lastUserRN);
|
|
#endif
|
|
|
|
if (haveImportantUserRules) {
|
|
aRuleWalker->SetLevel(SheetType::User, true, false);
|
|
AddImportantRules(lastUserRN, lastAgentRN, aRuleWalker); //user
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastUserRN, lastAgentRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantUARules) {
|
|
aRuleWalker->SetLevel(SheetType::Agent, true, false);
|
|
AddImportantRules(lastAgentRN, lastRestrictionRN, aRuleWalker); //agent
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastAgentRN, lastRestrictionRN);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
AssertNoCSSRules(lastRestrictionRN, mRuleTree);
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
nsRuleNode *lastImportantRN = aRuleWalker->CurrentNode();
|
|
#endif
|
|
aRuleWalker->SetLevel(SheetType::Transition, false, false);
|
|
(*aCollectorFunc)(mRuleProcessors[SheetType::Transition], aData);
|
|
#ifdef DEBUG
|
|
AssertNoCSSRules(aRuleWalker->CurrentNode(), lastImportantRN);
|
|
#endif
|
|
|
|
}
|
|
|
|
// Enumerate all the rules in a way that doesn't care about the order
|
|
// of the rules and doesn't walk !important-rules.
|
|
void
|
|
nsStyleSet::WalkRuleProcessors(nsIStyleRuleProcessor::EnumFunc aFunc,
|
|
ElementDependentRuleProcessorData* aData,
|
|
bool aWalkAllXBLStylesheets)
|
|
{
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
if (mRuleProcessors[SheetType::Agent])
|
|
(*aFunc)(mRuleProcessors[SheetType::Agent], aData);
|
|
|
|
bool skipUserStyles = aData->mElement->IsInNativeAnonymousSubtree();
|
|
if (!skipUserStyles && mRuleProcessors[SheetType::User]) // NOTE: different
|
|
(*aFunc)(mRuleProcessors[SheetType::User], aData);
|
|
|
|
if (mRuleProcessors[SheetType::PresHint])
|
|
(*aFunc)(mRuleProcessors[SheetType::PresHint], aData);
|
|
|
|
if (mRuleProcessors[SheetType::SVGAttrAnimation])
|
|
(*aFunc)(mRuleProcessors[SheetType::SVGAttrAnimation], aData);
|
|
|
|
bool cutOffInheritance = false;
|
|
if (mBindingManager) {
|
|
// We can supply additional document-level sheets that should be walked.
|
|
if (aWalkAllXBLStylesheets) {
|
|
mBindingManager->WalkAllRules(aFunc, aData);
|
|
} else {
|
|
mBindingManager->WalkRules(aFunc, aData, &cutOffInheritance);
|
|
}
|
|
}
|
|
if (!skipUserStyles && !cutOffInheritance) {
|
|
if (mRuleProcessors[SheetType::Doc]) // NOTE: different
|
|
(*aFunc)(mRuleProcessors[SheetType::Doc], aData);
|
|
if (aData->mElement->IsElementInStyleScope()) {
|
|
for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); i++)
|
|
(*aFunc)(mScopedDocSheetRuleProcessors[i], aData);
|
|
}
|
|
}
|
|
if (mRuleProcessors[SheetType::StyleAttr])
|
|
(*aFunc)(mRuleProcessors[SheetType::StyleAttr], aData);
|
|
if (mRuleProcessors[SheetType::Override])
|
|
(*aFunc)(mRuleProcessors[SheetType::Override], aData);
|
|
(*aFunc)(mRuleProcessors[SheetType::Animation], aData);
|
|
(*aFunc)(mRuleProcessors[SheetType::Transition], aData);
|
|
}
|
|
|
|
static void
|
|
InitStyleScopes(TreeMatchContext& aTreeContext, Element* aElement)
|
|
{
|
|
if (aElement->IsElementInStyleScope()) {
|
|
aTreeContext.InitStyleScopes(aElement->GetParentElementCrossingShadowRoot());
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleFor(Element* aElement,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aElement);
|
|
return ResolveStyleFor(aElement, aParentContext, treeContext);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleFor(Element* aElement,
|
|
nsStyleContext* aParentContext,
|
|
TreeMatchContext& aTreeMatchContext)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
NS_ASSERTION(aElement, "aElement must not be null");
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
aTreeMatchContext.ResetForUnvisitedMatching();
|
|
ElementRuleProcessorData data(PresContext(), aElement, &ruleWalker,
|
|
aTreeMatchContext);
|
|
WalkDisableTextZoomRule(aElement, &ruleWalker);
|
|
FileRules(EnumRulesMatching<ElementRuleProcessorData>, &data, aElement,
|
|
&ruleWalker);
|
|
|
|
nsRuleNode *ruleNode = ruleWalker.CurrentNode();
|
|
nsRuleNode *visitedRuleNode = nullptr;
|
|
|
|
if (aTreeMatchContext.HaveRelevantLink()) {
|
|
aTreeMatchContext.ResetForVisitedMatching();
|
|
ruleWalker.Reset();
|
|
FileRules(EnumRulesMatching<ElementRuleProcessorData>, &data, aElement,
|
|
&ruleWalker);
|
|
visitedRuleNode = ruleWalker.CurrentNode();
|
|
}
|
|
|
|
uint32_t flags = eDoAnimation;
|
|
if (nsCSSRuleProcessor::IsLink(aElement)) {
|
|
flags |= eIsLink;
|
|
}
|
|
if (nsCSSRuleProcessor::GetContentState(aElement, aTreeMatchContext).
|
|
HasState(NS_EVENT_STATE_VISITED)) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
if (aTreeMatchContext.mSkippingParentDisplayBasedStyleFixup) {
|
|
flags |= eSkipParentDisplayBasedStyleFixup;
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
nullptr, CSSPseudoElementType::NotPseudo,
|
|
aElement, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForRules(nsStyleContext* aParentContext,
|
|
const nsTArray< nsCOMPtr<nsIStyleRule> > &aRules)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
// FIXME: Perhaps this should be passed in, but it probably doesn't
|
|
// matter.
|
|
ruleWalker.SetLevel(SheetType::Doc, false, false);
|
|
for (uint32_t i = 0; i < aRules.Length(); i++) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(aRules.ElementAt(i));
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleWalker.CurrentNode(), nullptr,
|
|
nullptr, CSSPseudoElementType::NotPseudo,
|
|
nullptr, eNoFlags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleByAddingRules(nsStyleContext* aBaseContext,
|
|
const nsCOMArray<nsIStyleRule> &aRules)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
ruleWalker.SetCurrentNode(aBaseContext->RuleNode());
|
|
// This needs to be the transition sheet because that is the highest
|
|
// level of the cascade, and thus the only thing that makes sense if
|
|
// we are ever going to call ResolveStyleWithReplacement on the
|
|
// resulting context. It's also the right thing for the one case (the
|
|
// transition manager's cover rule) where we put the result of this
|
|
// function in the style context tree.
|
|
ruleWalker.SetLevel(SheetType::Transition, false, false);
|
|
for (int32_t i = 0; i < aRules.Count(); i++) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(aRules.ObjectAt(i));
|
|
}
|
|
|
|
nsRuleNode *ruleNode = ruleWalker.CurrentNode();
|
|
nsRuleNode *visitedRuleNode = nullptr;
|
|
|
|
if (aBaseContext->GetStyleIfVisited()) {
|
|
ruleWalker.SetCurrentNode(aBaseContext->GetStyleIfVisited()->RuleNode());
|
|
for (int32_t i = 0; i < aRules.Count(); i++) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(aRules.ObjectAt(i));
|
|
}
|
|
visitedRuleNode = ruleWalker.CurrentNode();
|
|
}
|
|
|
|
uint32_t flags = eNoFlags;
|
|
if (aBaseContext->IsLinkContext()) {
|
|
flags |= eIsLink;
|
|
|
|
// GetContext handles propagating RelevantLinkVisited state from the
|
|
// parent in non-link cases; all we need to pass in is if this link
|
|
// is visited.
|
|
if (aBaseContext->RelevantLinkVisited()) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
}
|
|
return GetContext(aBaseContext->GetParent(), ruleNode, visitedRuleNode,
|
|
aBaseContext->GetPseudo(),
|
|
aBaseContext->GetPseudoType(),
|
|
nullptr, flags);
|
|
}
|
|
|
|
struct RuleNodeInfo {
|
|
nsIStyleRule* mRule;
|
|
SheetType mLevel;
|
|
bool mIsImportant;
|
|
bool mIsAnimationRule;
|
|
};
|
|
|
|
struct CascadeLevel {
|
|
SheetType mLevel;
|
|
bool mIsImportant;
|
|
bool mCheckForImportantRules;
|
|
nsRestyleHint mLevelReplacementHint;
|
|
};
|
|
|
|
static const CascadeLevel gCascadeLevels[] = {
|
|
{ SheetType::Agent, false, false, nsRestyleHint(0) },
|
|
{ SheetType::User, false, false, nsRestyleHint(0) },
|
|
{ SheetType::PresHint, false, false, nsRestyleHint(0) },
|
|
{ SheetType::SVGAttrAnimation, false, false, eRestyle_SVGAttrAnimations },
|
|
{ SheetType::Doc, false, false, nsRestyleHint(0) },
|
|
{ SheetType::ScopedDoc, false, false, nsRestyleHint(0) },
|
|
{ SheetType::StyleAttr, false, true, eRestyle_StyleAttribute |
|
|
eRestyle_StyleAttribute_Animations },
|
|
{ SheetType::Override, false, false, nsRestyleHint(0) },
|
|
{ SheetType::Animation, false, false, eRestyle_CSSAnimations },
|
|
{ SheetType::ScopedDoc, true, false, nsRestyleHint(0) },
|
|
{ SheetType::Doc, true, false, nsRestyleHint(0) },
|
|
{ SheetType::StyleAttr, true, false, eRestyle_StyleAttribute |
|
|
eRestyle_StyleAttribute_Animations },
|
|
{ SheetType::Override, true, false, nsRestyleHint(0) },
|
|
{ SheetType::User, true, false, nsRestyleHint(0) },
|
|
{ SheetType::Agent, true, false, nsRestyleHint(0) },
|
|
{ SheetType::Transition, false, false, eRestyle_CSSTransitions },
|
|
};
|
|
|
|
nsRuleNode*
|
|
nsStyleSet::RuleNodeWithReplacement(Element* aElement,
|
|
Element* aPseudoElement,
|
|
nsRuleNode* aOldRuleNode,
|
|
CSSPseudoElementType aPseudoType,
|
|
nsRestyleHint aReplacements)
|
|
{
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
MOZ_ASSERT(!aPseudoElement ==
|
|
(aPseudoType >= CSSPseudoElementType::Count ||
|
|
!(nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aPseudoType) ||
|
|
nsCSSPseudoElements::PseudoElementSupportsUserActionState(aPseudoType))),
|
|
"should have aPseudoElement only for certain pseudo elements");
|
|
|
|
MOZ_ASSERT(!(aReplacements & ~(eRestyle_CSSTransitions |
|
|
eRestyle_CSSAnimations |
|
|
eRestyle_SVGAttrAnimations |
|
|
eRestyle_StyleAttribute |
|
|
eRestyle_StyleAttribute_Animations |
|
|
eRestyle_Force |
|
|
eRestyle_ForceDescendants)),
|
|
"unexpected replacement bits");
|
|
|
|
// FIXME (perf): This should probably not rebuild the whole path, but
|
|
// only the path from the last change in the rule tree, like
|
|
// ReplaceAnimationRule in nsStyleSet.cpp does. (That could then
|
|
// perhaps share this code, too?)
|
|
// But if we do that, we'll need to pass whether we are rebuilding the
|
|
// rule tree from ElementRestyler::RestyleSelf to avoid taking that
|
|
// path when we're rebuilding the rule tree.
|
|
|
|
// This array can be hot and often grows to ~20 elements, so inline storage
|
|
// is best.
|
|
AutoTArray<RuleNodeInfo, 30> rules;
|
|
for (nsRuleNode* ruleNode = aOldRuleNode; !ruleNode->IsRoot();
|
|
ruleNode = ruleNode->GetParent()) {
|
|
RuleNodeInfo* curRule = rules.AppendElement();
|
|
curRule->mRule = ruleNode->GetRule();
|
|
curRule->mLevel = ruleNode->GetLevel();
|
|
curRule->mIsImportant = ruleNode->IsImportantRule();
|
|
curRule->mIsAnimationRule = ruleNode->IsAnimationRule();
|
|
}
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
auto rulesIndex = rules.Length();
|
|
|
|
// We need to transfer this information between the non-!important and
|
|
// !important phases for the style attribute level.
|
|
nsRuleNode* lastScopedRN = nullptr;
|
|
nsRuleNode* lastStyleAttrRN = nullptr;
|
|
bool haveImportantStyleAttrRules = false;
|
|
|
|
for (const CascadeLevel *level = gCascadeLevels,
|
|
*levelEnd = ArrayEnd(gCascadeLevels);
|
|
level != levelEnd; ++level) {
|
|
|
|
bool doReplace = level->mLevelReplacementHint & aReplacements;
|
|
|
|
ruleWalker.SetLevel(level->mLevel, level->mIsImportant,
|
|
level->mCheckForImportantRules && doReplace);
|
|
|
|
if (doReplace) {
|
|
switch (level->mLevel) {
|
|
case SheetType::Animation: {
|
|
if (aPseudoType == CSSPseudoElementType::NotPseudo ||
|
|
aPseudoType == CSSPseudoElementType::before ||
|
|
aPseudoType == CSSPseudoElementType::after) {
|
|
nsIStyleRule* rule = PresContext()->EffectCompositor()->
|
|
GetAnimationRule(aElement, aPseudoType,
|
|
EffectCompositor::CascadeLevel::Animations,
|
|
nullptr);
|
|
if (rule) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(rule);
|
|
ruleWalker.CurrentNode()->SetIsAnimationRule();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case SheetType::Transition: {
|
|
if (aPseudoType == CSSPseudoElementType::NotPseudo ||
|
|
aPseudoType == CSSPseudoElementType::before ||
|
|
aPseudoType == CSSPseudoElementType::after) {
|
|
nsIStyleRule* rule = PresContext()->EffectCompositor()->
|
|
GetAnimationRule(aElement, aPseudoType,
|
|
EffectCompositor::CascadeLevel::Transitions,
|
|
nullptr);
|
|
if (rule) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(rule);
|
|
ruleWalker.CurrentNode()->SetIsAnimationRule();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case SheetType::SVGAttrAnimation: {
|
|
SVGAttrAnimationRuleProcessor* ruleProcessor =
|
|
static_cast<SVGAttrAnimationRuleProcessor*>(
|
|
mRuleProcessors[SheetType::SVGAttrAnimation].get());
|
|
if (ruleProcessor &&
|
|
aPseudoType == CSSPseudoElementType::NotPseudo) {
|
|
ruleProcessor->ElementRulesMatching(aElement, &ruleWalker);
|
|
}
|
|
break;
|
|
}
|
|
case SheetType::StyleAttr: {
|
|
if (!level->mIsImportant) {
|
|
// First time through, we handle the non-!important rule.
|
|
nsHTMLCSSStyleSheet* ruleProcessor =
|
|
static_cast<nsHTMLCSSStyleSheet*>(
|
|
mRuleProcessors[SheetType::StyleAttr].get());
|
|
if (ruleProcessor) {
|
|
lastScopedRN = ruleWalker.CurrentNode();
|
|
if (aPseudoType ==
|
|
CSSPseudoElementType::NotPseudo) {
|
|
ruleProcessor->ElementRulesMatching(PresContext(),
|
|
aElement,
|
|
&ruleWalker);
|
|
} else if (aPseudoType <
|
|
CSSPseudoElementType::Count &&
|
|
nsCSSPseudoElements::
|
|
PseudoElementSupportsStyleAttribute(aPseudoType)) {
|
|
ruleProcessor->PseudoElementRulesMatching(aPseudoElement,
|
|
aPseudoType,
|
|
&ruleWalker);
|
|
}
|
|
lastStyleAttrRN = ruleWalker.CurrentNode();
|
|
haveImportantStyleAttrRules =
|
|
!ruleWalker.GetCheckForImportantRules();
|
|
}
|
|
} else {
|
|
// Second time through, we handle the !important rule(s).
|
|
if (haveImportantStyleAttrRules) {
|
|
AddImportantRules(lastStyleAttrRN, lastScopedRN, &ruleWalker);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
MOZ_ASSERT(false, "unexpected result from gCascadeLevels lookup");
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (rulesIndex != 0) {
|
|
--rulesIndex;
|
|
const RuleNodeInfo& ruleInfo = rules[rulesIndex];
|
|
|
|
if (ruleInfo.mLevel != level->mLevel ||
|
|
ruleInfo.mIsImportant != level->mIsImportant) {
|
|
++rulesIndex;
|
|
break;
|
|
}
|
|
|
|
if (!doReplace) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(ruleInfo.mRule);
|
|
if (ruleInfo.mIsAnimationRule) {
|
|
ruleWalker.CurrentNode()->SetIsAnimationRule();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(rulesIndex == 0,
|
|
"rules are in incorrect cascading order, "
|
|
"which means we replaced them incorrectly");
|
|
|
|
return ruleWalker.CurrentNode();
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleWithReplacement(Element* aElement,
|
|
Element* aPseudoElement,
|
|
nsStyleContext* aNewParentContext,
|
|
nsStyleContext* aOldStyleContext,
|
|
nsRestyleHint aReplacements,
|
|
uint32_t aFlags)
|
|
{
|
|
nsRuleNode* ruleNode =
|
|
RuleNodeWithReplacement(aElement, aPseudoElement,
|
|
aOldStyleContext->RuleNode(),
|
|
aOldStyleContext->GetPseudoType(), aReplacements);
|
|
|
|
nsRuleNode* visitedRuleNode = nullptr;
|
|
nsStyleContext* oldStyleIfVisited = aOldStyleContext->GetStyleIfVisited();
|
|
if (oldStyleIfVisited) {
|
|
if (oldStyleIfVisited->RuleNode() == aOldStyleContext->RuleNode()) {
|
|
visitedRuleNode = ruleNode;
|
|
} else {
|
|
visitedRuleNode =
|
|
RuleNodeWithReplacement(aElement, aPseudoElement,
|
|
oldStyleIfVisited->RuleNode(),
|
|
oldStyleIfVisited->GetPseudoType(),
|
|
aReplacements);
|
|
}
|
|
}
|
|
|
|
uint32_t flags = eNoFlags;
|
|
if (aOldStyleContext->IsLinkContext()) {
|
|
flags |= eIsLink;
|
|
|
|
// GetContext handles propagating RelevantLinkVisited state from the
|
|
// parent in non-link cases; all we need to pass in is if this link
|
|
// is visited.
|
|
if (aOldStyleContext->RelevantLinkVisited()) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
}
|
|
|
|
CSSPseudoElementType pseudoType = aOldStyleContext->GetPseudoType();
|
|
Element* elementForAnimation = nullptr;
|
|
if (!(aFlags & eSkipStartingAnimations) &&
|
|
(pseudoType == CSSPseudoElementType::NotPseudo ||
|
|
pseudoType == CSSPseudoElementType::before ||
|
|
pseudoType == CSSPseudoElementType::after)) {
|
|
// We want to compute a correct elementForAnimation to pass in
|
|
// because at this point the parameter is more than just the element
|
|
// for animation; it's also used for the SetBodyTextColor call when
|
|
// it's the body element.
|
|
// However, we only want to set the flag to call CheckAnimationRule
|
|
// if we're dealing with a replacement (such as style attribute
|
|
// replacement) that could lead to the animation property changing,
|
|
// and we explicitly do NOT want to call CheckAnimationRule when
|
|
// we're trying to do an animation-only update.
|
|
if (aReplacements & ~(eRestyle_CSSTransitions | eRestyle_CSSAnimations)) {
|
|
flags |= eDoAnimation;
|
|
}
|
|
elementForAnimation = aElement;
|
|
#ifdef DEBUG
|
|
{
|
|
nsIFrame* styleFrame = nsLayoutUtils::GetStyleFrame(elementForAnimation);
|
|
NS_ASSERTION(pseudoType == CSSPseudoElementType::NotPseudo ||
|
|
!styleFrame ||
|
|
styleFrame->StyleContext()->GetPseudoType() ==
|
|
CSSPseudoElementType::NotPseudo,
|
|
"aElement should be the element and not the pseudo-element");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (aElement && aElement->IsRootOfAnonymousSubtree()) {
|
|
// For anonymous subtree roots, don't tweak "display" value based on whether
|
|
// or not the parent is styled as a flex/grid container. (If the parent
|
|
// has anonymous-subtree kids, then we know it's not actually going to get
|
|
// a flex/grid container frame, anyway.)
|
|
flags |= eSkipParentDisplayBasedStyleFixup;
|
|
}
|
|
|
|
return GetContext(aNewParentContext, ruleNode, visitedRuleNode,
|
|
aOldStyleContext->GetPseudo(), pseudoType,
|
|
elementForAnimation, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleWithoutAnimation(dom::Element* aTarget,
|
|
nsStyleContext* aStyleContext,
|
|
nsRestyleHint aWhichToRemove)
|
|
{
|
|
#ifdef DEBUG
|
|
CSSPseudoElementType pseudoType = aStyleContext->GetPseudoType();
|
|
#endif
|
|
MOZ_ASSERT(pseudoType == CSSPseudoElementType::NotPseudo ||
|
|
pseudoType == CSSPseudoElementType::before ||
|
|
pseudoType == CSSPseudoElementType::after,
|
|
"unexpected type for animations");
|
|
MOZ_ASSERT(PresContext()->RestyleManager()->IsGecko(),
|
|
"stylo: the style set and restyle manager must have the same "
|
|
"StyleBackendType");
|
|
RestyleManager* restyleManager = PresContext()->RestyleManager()->AsGecko();
|
|
|
|
bool oldSkipAnimationRules = restyleManager->SkipAnimationRules();
|
|
restyleManager->SetSkipAnimationRules(true);
|
|
|
|
RefPtr<nsStyleContext> result =
|
|
ResolveStyleWithReplacement(aTarget, nullptr, aStyleContext->GetParent(),
|
|
aStyleContext, aWhichToRemove,
|
|
eSkipStartingAnimations);
|
|
|
|
restyleManager->SetSkipAnimationRules(oldSkipAnimationRules);
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForText(nsIContent* aTextNode,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
MOZ_ASSERT(aTextNode && aTextNode->IsNodeOfType(nsINode::eTEXT));
|
|
return GetContext(aParentContext, mRuleTree, nullptr,
|
|
nsCSSAnonBoxes::mozText,
|
|
CSSPseudoElementType::AnonBox, nullptr, eNoFlags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForOtherNonElement(nsStyleContext* aParentContext)
|
|
{
|
|
return GetContext(aParentContext, mRuleTree, nullptr,
|
|
nsCSSAnonBoxes::mozOtherNonElement,
|
|
CSSPseudoElementType::AnonBox, nullptr, eNoFlags);
|
|
}
|
|
|
|
void
|
|
nsStyleSet::WalkRestrictionRule(CSSPseudoElementType aPseudoType,
|
|
nsRuleWalker* aRuleWalker)
|
|
{
|
|
// This needs to match GetPseudoRestriction in nsRuleNode.cpp.
|
|
aRuleWalker->SetLevel(SheetType::Agent, false, false);
|
|
if (aPseudoType == CSSPseudoElementType::firstLetter)
|
|
aRuleWalker->Forward(mFirstLetterRule);
|
|
else if (aPseudoType == CSSPseudoElementType::firstLine)
|
|
aRuleWalker->Forward(mFirstLineRule);
|
|
else if (aPseudoType == CSSPseudoElementType::placeholder)
|
|
aRuleWalker->Forward(mPlaceholderRule);
|
|
}
|
|
|
|
void
|
|
nsStyleSet::WalkDisableTextZoomRule(Element* aElement, nsRuleWalker* aRuleWalker)
|
|
{
|
|
aRuleWalker->SetLevel(SheetType::Agent, false, false);
|
|
if (aElement->IsSVGElement(nsGkAtoms::text))
|
|
aRuleWalker->Forward(mDisableTextZoomStyleRule);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolvePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext,
|
|
Element* aPseudoElement)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
NS_ASSERTION(aType < CSSPseudoElementType::Count,
|
|
"must have pseudo element type");
|
|
NS_ASSERTION(aParentElement, "Must have parent element");
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aParentElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aParentElement);
|
|
PseudoElementRuleProcessorData data(PresContext(), aParentElement,
|
|
&ruleWalker, aType, treeContext,
|
|
aPseudoElement);
|
|
WalkRestrictionRule(aType, &ruleWalker);
|
|
FileRules(EnumRulesMatching<PseudoElementRuleProcessorData>, &data,
|
|
aParentElement, &ruleWalker);
|
|
|
|
nsRuleNode *ruleNode = ruleWalker.CurrentNode();
|
|
nsRuleNode *visitedRuleNode = nullptr;
|
|
|
|
if (treeContext.HaveRelevantLink()) {
|
|
treeContext.ResetForVisitedMatching();
|
|
ruleWalker.Reset();
|
|
WalkRestrictionRule(aType, &ruleWalker);
|
|
FileRules(EnumRulesMatching<PseudoElementRuleProcessorData>, &data,
|
|
aParentElement, &ruleWalker);
|
|
visitedRuleNode = ruleWalker.CurrentNode();
|
|
}
|
|
|
|
// For pseudos, |data.IsLink()| being true means that
|
|
// our parent node is a link.
|
|
uint32_t flags = eNoFlags;
|
|
if (aType == CSSPseudoElementType::before ||
|
|
aType == CSSPseudoElementType::after) {
|
|
flags |= eDoAnimation;
|
|
} else {
|
|
// Flex and grid containers don't expect to have any pseudo-element children
|
|
// aside from ::before and ::after. So if we have such a child, we're not
|
|
// actually in a flex/grid container, and we should skip flex/grid item
|
|
// style fixup.
|
|
flags |= eSkipParentDisplayBasedStyleFixup;
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
nsCSSPseudoElements::GetPseudoAtom(aType), aType,
|
|
aParentElement, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aParentElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aParentElement);
|
|
return ProbePseudoElementStyle(aParentElement, aType, aParentContext,
|
|
treeContext);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
CSSPseudoElementType aType,
|
|
nsStyleContext* aParentContext,
|
|
TreeMatchContext& aTreeMatchContext,
|
|
Element* aPseudoElement)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
NS_ASSERTION(aType < CSSPseudoElementType::Count,
|
|
"must have pseudo element type");
|
|
NS_ASSERTION(aParentElement, "aParentElement must not be null");
|
|
|
|
nsIAtom* pseudoTag = nsCSSPseudoElements::GetPseudoAtom(aType);
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
aTreeMatchContext.ResetForUnvisitedMatching();
|
|
PseudoElementRuleProcessorData data(PresContext(), aParentElement,
|
|
&ruleWalker, aType, aTreeMatchContext,
|
|
aPseudoElement);
|
|
WalkRestrictionRule(aType, &ruleWalker);
|
|
// not the root if there was a restriction rule
|
|
nsRuleNode *adjustedRoot = ruleWalker.CurrentNode();
|
|
FileRules(EnumRulesMatching<PseudoElementRuleProcessorData>, &data,
|
|
aParentElement, &ruleWalker);
|
|
|
|
nsRuleNode *ruleNode = ruleWalker.CurrentNode();
|
|
if (ruleNode == adjustedRoot) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsRuleNode *visitedRuleNode = nullptr;
|
|
|
|
if (aTreeMatchContext.HaveRelevantLink()) {
|
|
aTreeMatchContext.ResetForVisitedMatching();
|
|
ruleWalker.Reset();
|
|
WalkRestrictionRule(aType, &ruleWalker);
|
|
FileRules(EnumRulesMatching<PseudoElementRuleProcessorData>, &data,
|
|
aParentElement, &ruleWalker);
|
|
visitedRuleNode = ruleWalker.CurrentNode();
|
|
}
|
|
|
|
// For pseudos, |data.IsLink()| being true means that
|
|
// our parent node is a link.
|
|
uint32_t flags = eNoFlags;
|
|
if (aType == CSSPseudoElementType::before ||
|
|
aType == CSSPseudoElementType::after) {
|
|
flags |= eDoAnimation;
|
|
} else {
|
|
// Flex and grid containers don't expect to have any pseudo-element children
|
|
// aside from ::before and ::after. So if we have such a child, we're not
|
|
// actually in a flex/grid container, and we should skip flex/grid item
|
|
// style fixup.
|
|
flags |= eSkipParentDisplayBasedStyleFixup;
|
|
}
|
|
|
|
RefPtr<nsStyleContext> result =
|
|
GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
pseudoTag, aType,
|
|
aParentElement, flags);
|
|
|
|
// For :before and :after pseudo-elements, having display: none or no
|
|
// 'content' property is equivalent to not having the pseudo-element
|
|
// at all.
|
|
if (result &&
|
|
(pseudoTag == nsCSSPseudoElements::before ||
|
|
pseudoTag == nsCSSPseudoElements::after)) {
|
|
const nsStyleDisplay *display = result->StyleDisplay();
|
|
const nsStyleContent *content = result->StyleContent();
|
|
// XXXldb What is contentCount for |content: ""|?
|
|
if (display->mDisplay == StyleDisplay::None ||
|
|
content->ContentCount() == 0) {
|
|
result = nullptr;
|
|
}
|
|
}
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveAnonymousBoxStyle(nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext,
|
|
uint32_t aFlags)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
#ifdef DEBUG
|
|
bool isAnonBox = nsCSSAnonBoxes::IsAnonBox(aPseudoTag)
|
|
#ifdef MOZ_XUL
|
|
&& !nsCSSAnonBoxes::IsTreePseudoElement(aPseudoTag)
|
|
#endif
|
|
;
|
|
NS_PRECONDITION(isAnonBox, "Unexpected pseudo");
|
|
#endif
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
AnonBoxRuleProcessorData data(PresContext(), aPseudoTag, &ruleWalker);
|
|
FileRules(EnumRulesMatching<AnonBoxRuleProcessorData>, &data, nullptr,
|
|
&ruleWalker);
|
|
|
|
if (aPseudoTag == nsCSSAnonBoxes::pageContent) {
|
|
// Add any @page rules that are specified.
|
|
nsTArray<nsCSSPageRule*> rules;
|
|
nsTArray<css::ImportantStyleData*> importantRules;
|
|
AppendPageRules(rules);
|
|
for (uint32_t i = 0, i_end = rules.Length(); i != i_end; ++i) {
|
|
css::Declaration* declaration = rules[i]->Declaration();
|
|
declaration->SetImmutable();
|
|
ruleWalker.Forward(declaration);
|
|
css::ImportantStyleData* importantRule =
|
|
declaration->GetImportantStyleData();
|
|
if (importantRule) {
|
|
importantRules.AppendElement(importantRule);
|
|
}
|
|
}
|
|
for (uint32_t i = 0, i_end = importantRules.Length(); i != i_end; ++i) {
|
|
ruleWalker.Forward(importantRules[i]);
|
|
}
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleWalker.CurrentNode(), nullptr,
|
|
aPseudoTag, CSSPseudoElementType::AnonBox,
|
|
nullptr, aFlags);
|
|
}
|
|
|
|
#ifdef MOZ_XUL
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveXULTreePseudoStyle(Element* aParentElement,
|
|
nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext,
|
|
nsICSSPseudoComparator* aComparator)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
NS_ASSERTION(aPseudoTag, "must have pseudo tag");
|
|
NS_ASSERTION(nsCSSAnonBoxes::IsTreePseudoElement(aPseudoTag),
|
|
"Unexpected pseudo");
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aParentElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aParentElement);
|
|
XULTreeRuleProcessorData data(PresContext(), aParentElement, &ruleWalker,
|
|
aPseudoTag, aComparator, treeContext);
|
|
FileRules(EnumRulesMatching<XULTreeRuleProcessorData>, &data, aParentElement,
|
|
&ruleWalker);
|
|
|
|
nsRuleNode *ruleNode = ruleWalker.CurrentNode();
|
|
nsRuleNode *visitedRuleNode = nullptr;
|
|
|
|
if (treeContext.HaveRelevantLink()) {
|
|
treeContext.ResetForVisitedMatching();
|
|
ruleWalker.Reset();
|
|
FileRules(EnumRulesMatching<XULTreeRuleProcessorData>, &data,
|
|
aParentElement, &ruleWalker);
|
|
visitedRuleNode = ruleWalker.CurrentNode();
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
// For pseudos, |data.IsLink()| being true means that
|
|
// our parent node is a link.
|
|
aPseudoTag, CSSPseudoElementType::XULTree,
|
|
nullptr, eNoFlags);
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
nsStyleSet::AppendFontFaceRules(nsTArray<nsFontFaceRuleContainer>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
for (uint32_t i = 0; i < ArrayLength(gCSSSheetTypes); ++i) {
|
|
if (gCSSSheetTypes[i] == SheetType::ScopedDoc)
|
|
continue;
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc && !ruleProc->AppendFontFaceRules(presContext, aArray))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
nsCSSKeyframesRule*
|
|
nsStyleSet::KeyframesRuleForName(const nsString& aName)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
for (uint32_t i = ArrayLength(gCSSSheetTypes); i-- != 0; ) {
|
|
if (gCSSSheetTypes[i] == SheetType::ScopedDoc)
|
|
continue;
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (!ruleProc)
|
|
continue;
|
|
nsCSSKeyframesRule* result =
|
|
ruleProc->KeyframesRuleForName(presContext, aName);
|
|
if (result)
|
|
return result;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsCSSCounterStyleRule*
|
|
nsStyleSet::CounterStyleRuleForName(const nsAString& aName)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
for (uint32_t i = ArrayLength(gCSSSheetTypes); i-- != 0; ) {
|
|
if (gCSSSheetTypes[i] == SheetType::ScopedDoc)
|
|
continue;
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (!ruleProc)
|
|
continue;
|
|
nsCSSCounterStyleRule *result =
|
|
ruleProc->CounterStyleRuleForName(presContext, aName);
|
|
if (result)
|
|
return result;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::AppendFontFeatureValuesRules(
|
|
nsTArray<nsCSSFontFeatureValuesRule*>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
for (uint32_t i = 0; i < ArrayLength(gCSSSheetTypes); ++i) {
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc &&
|
|
!ruleProc->AppendFontFeatureValuesRules(presContext, aArray))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<gfxFontFeatureValueSet>
|
|
nsStyleSet::GetFontFeatureValuesLookup()
|
|
{
|
|
if (mInitFontFeatureValuesLookup) {
|
|
mInitFontFeatureValuesLookup = false;
|
|
|
|
nsTArray<nsCSSFontFeatureValuesRule*> rules;
|
|
AppendFontFeatureValuesRules(rules);
|
|
|
|
mFontFeatureValuesLookup = new gfxFontFeatureValueSet();
|
|
|
|
uint32_t i, numRules = rules.Length();
|
|
for (i = 0; i < numRules; i++) {
|
|
nsCSSFontFeatureValuesRule *rule = rules[i];
|
|
|
|
const nsTArray<FontFamilyName>& familyList = rule->GetFamilyList().GetFontlist();
|
|
const nsTArray<gfxFontFeatureValueSet::FeatureValues>&
|
|
featureValues = rule->GetFeatureValues();
|
|
|
|
// for each family
|
|
size_t f, numFam;
|
|
|
|
numFam = familyList.Length();
|
|
for (f = 0; f < numFam; f++) {
|
|
mFontFeatureValuesLookup->AddFontFeatureValues(familyList[f].mName,
|
|
featureValues);
|
|
}
|
|
}
|
|
}
|
|
|
|
RefPtr<gfxFontFeatureValueSet> lookup = mFontFeatureValuesLookup;
|
|
return lookup.forget();
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::AppendPageRules(nsTArray<nsCSSPageRule*>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
for (uint32_t i = 0; i < ArrayLength(gCSSSheetTypes); ++i) {
|
|
if (gCSSSheetTypes[i] == SheetType::ScopedDoc)
|
|
continue;
|
|
nsCSSRuleProcessor* ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc && !ruleProc->AppendPageRules(presContext, aArray))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsStyleSet::BeginShutdown()
|
|
{
|
|
mInShutdown = 1;
|
|
}
|
|
|
|
void
|
|
nsStyleSet::Shutdown()
|
|
{
|
|
mRuleTree = nullptr;
|
|
GCRuleTrees();
|
|
MOZ_ASSERT(mUnusedRuleNodeList.isEmpty());
|
|
MOZ_ASSERT(mUnusedRuleNodeCount == 0);
|
|
}
|
|
|
|
|
|
void
|
|
nsStyleSet::GCRuleTrees()
|
|
{
|
|
MOZ_ASSERT(!mInReconstruct);
|
|
MOZ_ASSERT(!mInGC);
|
|
mInGC = true;
|
|
|
|
while (!mUnusedRuleNodeList.isEmpty()) {
|
|
nsRuleNode* node = mUnusedRuleNodeList.popFirst();
|
|
#ifdef DEBUG
|
|
if (node == mOldRootNode) {
|
|
// Flag that we've GCed the old root, if any.
|
|
mOldRootNode = nullptr;
|
|
}
|
|
#endif
|
|
node->Destroy();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_ASSERTION(!mOldRootNode, "Should have GCed old root node");
|
|
mOldRootNode = nullptr;
|
|
#endif
|
|
mUnusedRuleNodeCount = 0;
|
|
mInGC = false;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ReparentStyleContext(nsStyleContext* aStyleContext,
|
|
nsStyleContext* aNewParentContext,
|
|
Element* aElement)
|
|
{
|
|
MOZ_ASSERT(aStyleContext, "aStyleContext must not be null");
|
|
|
|
// This short-circuit is OK because we don't call TryInitatingTransition
|
|
// during style reresolution if the style context pointer hasn't changed.
|
|
if (aStyleContext->GetParent() == aNewParentContext) {
|
|
RefPtr<nsStyleContext> ret = aStyleContext;
|
|
return ret.forget();
|
|
}
|
|
|
|
nsIAtom* pseudoTag = aStyleContext->GetPseudo();
|
|
CSSPseudoElementType pseudoType = aStyleContext->GetPseudoType();
|
|
nsRuleNode* ruleNode = aStyleContext->RuleNode();
|
|
|
|
MOZ_ASSERT(PresContext()->RestyleManager()->IsGecko(),
|
|
"stylo: the style set and restyle manager must have the same "
|
|
"StyleBackendType");
|
|
NS_ASSERTION(!PresContext()->RestyleManager()->AsGecko()->SkipAnimationRules(),
|
|
"we no longer handle SkipAnimationRules()");
|
|
|
|
nsRuleNode* visitedRuleNode = nullptr;
|
|
nsStyleContext* visitedContext = aStyleContext->GetStyleIfVisited();
|
|
// Reparenting a style context just changes where we inherit from,
|
|
// not what rules we match or what our DOM looks like. In
|
|
// particular, it doesn't change whether this is a style context for
|
|
// a link.
|
|
if (visitedContext) {
|
|
visitedRuleNode = visitedContext->RuleNode();
|
|
}
|
|
|
|
uint32_t flags = eNoFlags;
|
|
if (aStyleContext->IsLinkContext()) {
|
|
flags |= eIsLink;
|
|
|
|
// GetContext handles propagating RelevantLinkVisited state from the
|
|
// parent in non-link cases; all we need to pass in is if this link
|
|
// is visited.
|
|
if (aStyleContext->RelevantLinkVisited()) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
}
|
|
|
|
if (pseudoType == CSSPseudoElementType::NotPseudo ||
|
|
pseudoType == CSSPseudoElementType::before ||
|
|
pseudoType == CSSPseudoElementType::after) {
|
|
flags |= eDoAnimation;
|
|
}
|
|
|
|
if (aElement && aElement->IsRootOfAnonymousSubtree()) {
|
|
// For anonymous subtree roots, don't tweak "display" value based on whether
|
|
// or not the parent is styled as a flex/grid container. (If the parent
|
|
// has anonymous-subtree kids, then we know it's not actually going to get
|
|
// a flex/grid container frame, anyway.)
|
|
flags |= eSkipParentDisplayBasedStyleFixup;
|
|
}
|
|
|
|
return GetContext(aNewParentContext, ruleNode, visitedRuleNode,
|
|
pseudoTag, pseudoType,
|
|
aElement, flags);
|
|
}
|
|
|
|
struct MOZ_STACK_CLASS StatefulData : public StateRuleProcessorData {
|
|
StatefulData(nsPresContext* aPresContext, Element* aElement,
|
|
EventStates aStateMask, TreeMatchContext& aTreeMatchContext)
|
|
: StateRuleProcessorData(aPresContext, aElement, aStateMask,
|
|
aTreeMatchContext),
|
|
mHint(nsRestyleHint(0))
|
|
{}
|
|
nsRestyleHint mHint;
|
|
};
|
|
|
|
struct MOZ_STACK_CLASS StatefulPseudoElementData : public PseudoElementStateRuleProcessorData {
|
|
StatefulPseudoElementData(nsPresContext* aPresContext, Element* aElement,
|
|
EventStates aStateMask, CSSPseudoElementType aPseudoType,
|
|
TreeMatchContext& aTreeMatchContext, Element* aPseudoElement)
|
|
: PseudoElementStateRuleProcessorData(aPresContext, aElement, aStateMask,
|
|
aPseudoType, aTreeMatchContext,
|
|
aPseudoElement),
|
|
mHint(nsRestyleHint(0))
|
|
{}
|
|
nsRestyleHint mHint;
|
|
};
|
|
|
|
static bool SheetHasDocumentStateStyle(nsIStyleRuleProcessor* aProcessor,
|
|
void *aData)
|
|
{
|
|
StatefulData* data = (StatefulData*)aData;
|
|
if (aProcessor->HasDocumentStateDependentStyle(data)) {
|
|
data->mHint = eRestyle_Self;
|
|
return false; // don't continue
|
|
}
|
|
return true; // continue
|
|
}
|
|
|
|
// Test if style is dependent on a document state.
|
|
bool
|
|
nsStyleSet::HasDocumentStateDependentStyle(nsIContent* aContent,
|
|
EventStates aStateMask)
|
|
{
|
|
if (!aContent || !aContent->IsElement())
|
|
return false;
|
|
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aContent->OwnerDoc());
|
|
InitStyleScopes(treeContext, aContent->AsElement());
|
|
StatefulData data(PresContext(), aContent->AsElement(), aStateMask,
|
|
treeContext);
|
|
WalkRuleProcessors(SheetHasDocumentStateStyle, &data, true);
|
|
return data.mHint != 0;
|
|
}
|
|
|
|
static bool SheetHasStatefulStyle(nsIStyleRuleProcessor* aProcessor,
|
|
void *aData)
|
|
{
|
|
StatefulData* data = (StatefulData*)aData;
|
|
nsRestyleHint hint = aProcessor->HasStateDependentStyle(data);
|
|
data->mHint = nsRestyleHint(data->mHint | hint);
|
|
return true; // continue
|
|
}
|
|
|
|
static bool SheetHasStatefulPseudoElementStyle(nsIStyleRuleProcessor* aProcessor,
|
|
void *aData)
|
|
{
|
|
StatefulPseudoElementData* data = (StatefulPseudoElementData*)aData;
|
|
nsRestyleHint hint = aProcessor->HasStateDependentStyle(data);
|
|
data->mHint = nsRestyleHint(data->mHint | hint);
|
|
return true; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsRestyleHint
|
|
nsStyleSet::HasStateDependentStyle(Element* aElement,
|
|
EventStates aStateMask)
|
|
{
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aElement);
|
|
StatefulData data(PresContext(), aElement, aStateMask, treeContext);
|
|
WalkRuleProcessors(SheetHasStatefulStyle, &data, false);
|
|
return data.mHint;
|
|
}
|
|
|
|
nsRestyleHint
|
|
nsStyleSet::HasStateDependentStyle(Element* aElement,
|
|
CSSPseudoElementType aPseudoType,
|
|
Element* aPseudoElement,
|
|
EventStates aStateMask)
|
|
{
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aElement);
|
|
StatefulPseudoElementData data(PresContext(), aElement, aStateMask,
|
|
aPseudoType, treeContext, aPseudoElement);
|
|
WalkRuleProcessors(SheetHasStatefulPseudoElementStyle, &data, false);
|
|
return data.mHint;
|
|
}
|
|
|
|
struct MOZ_STACK_CLASS AttributeData : public AttributeRuleProcessorData {
|
|
AttributeData(nsPresContext* aPresContext, Element* aElement,
|
|
int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType,
|
|
bool aAttrHasChanged, const nsAttrValue* aOtherValue,
|
|
TreeMatchContext& aTreeMatchContext)
|
|
: AttributeRuleProcessorData(aPresContext, aElement, aNameSpaceID,
|
|
aAttribute, aModType, aAttrHasChanged,
|
|
aOtherValue, aTreeMatchContext),
|
|
mHint(nsRestyleHint(0))
|
|
{}
|
|
nsRestyleHint mHint;
|
|
RestyleHintData mHintData;
|
|
};
|
|
|
|
static bool
|
|
SheetHasAttributeStyle(nsIStyleRuleProcessor* aProcessor, void *aData)
|
|
{
|
|
AttributeData* data = (AttributeData*)aData;
|
|
nsRestyleHint hint =
|
|
aProcessor->HasAttributeDependentStyle(data, data->mHintData);
|
|
data->mHint = nsRestyleHint(data->mHint | hint);
|
|
return true; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsRestyleHint
|
|
nsStyleSet::HasAttributeDependentStyle(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType,
|
|
bool aAttrHasChanged,
|
|
const nsAttrValue* aOtherValue,
|
|
mozilla::RestyleHintData&
|
|
aRestyleHintDataResult)
|
|
{
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aElement->OwnerDoc());
|
|
InitStyleScopes(treeContext, aElement);
|
|
AttributeData data(PresContext(), aElement, aNameSpaceID, aAttribute,
|
|
aModType, aAttrHasChanged, aOtherValue, treeContext);
|
|
WalkRuleProcessors(SheetHasAttributeStyle, &data, false);
|
|
if (!(data.mHint & eRestyle_Subtree)) {
|
|
// No point keeping the list of selectors around if we are going to
|
|
// restyle the whole subtree unconditionally.
|
|
aRestyleHintDataResult = Move(data.mHintData);
|
|
}
|
|
return data.mHint;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::MediumFeaturesChanged()
|
|
{
|
|
NS_ASSERTION(mBatching == 0, "rule processors out of date");
|
|
|
|
// We can't use WalkRuleProcessors without a content node.
|
|
nsPresContext* presContext = PresContext();
|
|
bool stylesChanged = false;
|
|
for (nsIStyleRuleProcessor* processor : mRuleProcessors) {
|
|
if (!processor) {
|
|
continue;
|
|
}
|
|
bool thisChanged = processor->MediumFeaturesChanged(presContext);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
for (nsIStyleRuleProcessor* processor : mScopedDocSheetRuleProcessors) {
|
|
bool thisChanged = processor->MediumFeaturesChanged(presContext);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
|
|
if (mBindingManager) {
|
|
bool thisChanged = false;
|
|
mBindingManager->MediumFeaturesChanged(presContext, &thisChanged);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
|
|
return stylesChanged;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::EnsureUniqueInnerOnCSSSheets()
|
|
{
|
|
AutoTArray<CSSStyleSheet*, 32> queue;
|
|
for (SheetType type : gCSSSheetTypes) {
|
|
for (CSSStyleSheet* sheet : mSheets[type]) {
|
|
queue.AppendElement(sheet);
|
|
}
|
|
}
|
|
|
|
if (mBindingManager) {
|
|
AutoTArray<StyleSheet*, 32> sheets;
|
|
// XXXheycam stylo: AppendAllSheets will need to be able to return either
|
|
// CSSStyleSheets or ServoStyleSheets, on request (and then here requesting
|
|
// CSSStyleSheets).
|
|
mBindingManager->AppendAllSheets(sheets);
|
|
for (StyleSheet* sheet : sheets) {
|
|
MOZ_ASSERT(sheet->IsGecko(), "stylo: AppendAllSheets shouldn't give us "
|
|
"ServoStyleSheets yet");
|
|
queue.AppendElement(sheet->AsGecko());
|
|
}
|
|
}
|
|
|
|
while (!queue.IsEmpty()) {
|
|
uint32_t idx = queue.Length() - 1;
|
|
CSSStyleSheet* sheet = queue[idx];
|
|
queue.RemoveElementAt(idx);
|
|
|
|
sheet->EnsureUniqueInner();
|
|
|
|
// Enqueue all the sheet's children.
|
|
sheet->AppendAllChildSheets(queue);
|
|
}
|
|
|
|
bool res = mNeedsRestyleAfterEnsureUniqueInner;
|
|
mNeedsRestyleAfterEnsureUniqueInner = false;
|
|
return res;
|
|
}
|
|
|
|
nsIStyleRule*
|
|
nsStyleSet::InitialStyleRule()
|
|
{
|
|
if (!mInitialStyleRule) {
|
|
mInitialStyleRule = new nsInitialStyleRule;
|
|
}
|
|
return mInitialStyleRule;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::HasRuleProcessorUsedByMultipleStyleSets(SheetType aSheetType)
|
|
{
|
|
MOZ_ASSERT(size_t(aSheetType) < ArrayLength(mRuleProcessors));
|
|
if (!IsCSSSheetType(aSheetType) || !mRuleProcessors[aSheetType]) {
|
|
return false;
|
|
}
|
|
nsCSSRuleProcessor* rp =
|
|
static_cast<nsCSSRuleProcessor*>(mRuleProcessors[aSheetType].get());
|
|
return rp->IsUsedByMultipleStyleSets();
|
|
}
|
|
|
|
void
|
|
nsStyleSet::ClearSelectors()
|
|
{
|
|
// We might be called before we've done our first rule tree construction.
|
|
if (!mRuleTree) {
|
|
return;
|
|
}
|
|
MOZ_ASSERT(PresContext()->RestyleManager()->IsGecko(),
|
|
"stylo: the style set and restyle manager must have the same "
|
|
"StyleBackendType");
|
|
PresContext()->RestyleManager()->AsGecko()->ClearSelectors();
|
|
}
|