mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 13:45:27 +00:00
2003 lines
66 KiB
C++
2003 lines
66 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 "mozilla/MemoryReporting.h"
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#include "mozilla/Util.h"
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#include "nsStyleSet.h"
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#include "nsCSSStyleSheet.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 "nsTransitionManager.h"
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#include "nsAnimationManager.h"
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#include "nsEventStates.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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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS1(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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#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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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[empty style rule] {}\n", out);
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}
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#endif
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NS_IMPL_ISUPPORTS1(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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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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#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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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[initial style rule] {}\n", out);
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}
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#endif
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NS_IMPL_ISUPPORTS1(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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#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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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[disable text zoom style rule] {}\n", out);
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}
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#endif
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static const nsStyleSet::sheetType gCSSSheetTypes[] = {
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// From lowest to highest in cascading order.
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nsStyleSet::eAgentSheet,
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nsStyleSet::eUserSheet,
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nsStyleSet::eDocSheet,
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nsStyleSet::eScopedDocSheet,
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nsStyleSet::eOverrideSheet
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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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mAuthorStyleDisabled(false),
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mInReconstruct(false),
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mInitFontFeatureValuesLookup(true),
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mDirty(0),
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mUnusedRuleNodeCount(0)
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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 (int i = 0; i < eSheetTypeCount; i++) {
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if (mRuleProcessors[i]) {
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n += mRuleProcessors[i]->SizeOfIncludingThis(aMallocSizeOf);
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}
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n += mSheets[i].SizeOfExcludingThis(nullptr, 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.SizeOfExcludingThis(aMallocSizeOf);
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n += mRoots.SizeOfExcludingThis(aMallocSizeOf);
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n += mOldRuleTrees.SizeOfExcludingThis(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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GatherRuleProcessors(eAnimationSheet);
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GatherRuleProcessors(eTransitionSheet);
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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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// Create a new rule tree root
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nsRuleNode* newTree =
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nsRuleNode::CreateRootNode(mRuleTree->PresContext());
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if (!newTree)
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return NS_ERROR_OUT_OF_MEMORY;
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// Save the old rule tree so we can destroy it later
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if (!mOldRuleTrees.AppendElement(mRuleTree)) {
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newTree->Destroy();
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// We need to keep mRoots so that the rule tree GC will only free the
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// rule trees that really aren't referenced anymore (which should be
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// all of them, if there are no bugs in reresolution code).
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mInReconstruct = true;
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mRuleTree = newTree;
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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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#ifdef DEBUG
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for (int32_t i = mRoots.Length() - 1; i >= 0; --i) {
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nsRuleNode *n = mRoots[i]->RuleNode();
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while (n->GetParent()) {
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n = n->GetParent();
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}
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// Since nsStyleContext's mParent and mRuleNode are immutable, and
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// style contexts own their parents, and nsStyleContext asserts in
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// its constructor that the style context and its parent are in the
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// same rule tree, we don't need to check any of the children of
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// mRoots; we only need to check the rule nodes of mRoots
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// themselves.
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NS_ASSERTION(n == mRuleTree, "style context has old rule node");
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}
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#endif
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// This *should* destroy the only element of mOldRuleTrees, but in
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// case of some bugs (which would trigger the above assertions), it
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// won't.
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GCRuleTrees();
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}
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void
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nsStyleSet::SetQuirkStyleSheet(nsIStyleSheet* aQuirkStyleSheet)
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{
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NS_ASSERTION(aQuirkStyleSheet, "Must have quirk sheet if this is called");
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NS_ASSERTION(!mQuirkStyleSheet, "Multiple calls to SetQuirkStyleSheet?");
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NS_ASSERTION(mSheets[eAgentSheet].IndexOf(aQuirkStyleSheet) != -1,
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"Quirk style sheet not one of our agent sheets?");
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mQuirkStyleSheet = aQuirkStyleSheet;
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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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nsCSSStyleSheet* 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<nsCSSStyleSheet*>& 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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cache.Init();
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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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mRuleProcessors[aType] = nullptr;
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if (aType == eScopedDocSheet) {
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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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mScopedDocSheetRuleProcessors.Clear();
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}
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if (mAuthorStyleDisabled && (aType == eDocSheet ||
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aType == eScopedDocSheet ||
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aType == eStyleAttrSheet)) {
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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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// handle the types for which have a rule processor that does not
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// implement the style sheet interface.
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case eAnimationSheet:
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MOZ_ASSERT(mSheets[aType].Count() == 0);
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mRuleProcessors[aType] = PresContext()->AnimationManager();
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return NS_OK;
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case eTransitionSheet:
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MOZ_ASSERT(mSheets[aType].Count() == 0);
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mRuleProcessors[aType] = PresContext()->TransitionManager();
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return NS_OK;
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case eStyleAttrSheet:
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MOZ_ASSERT(mSheets[aType].Count() == 0);
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mRuleProcessors[aType] = PresContext()->Document()->GetInlineStyleSheet();
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return NS_OK;
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case ePresHintSheet:
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MOZ_ASSERT(mSheets[aType].Count() == 0);
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mRuleProcessors[aType] = PresContext()->Document()->GetAttributeStyleSheet();
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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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if (aType == eScopedDocSheet) {
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// Create a rule processor for each scope.
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uint32_t count = mSheets[eScopedDocSheet].Count();
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if (count) {
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// Gather the scoped style sheets into an array as
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// nsCSSStyleSheets, and mark all of their scope elements
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// as scoped style roots.
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nsTArray<nsCSSStyleSheet*> sheets(count);
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for (uint32_t i = 0; i < count; i++) {
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nsRefPtr<nsCSSStyleSheet> sheet =
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do_QueryObject(mSheets[eScopedDocSheet].ObjectAt(i));
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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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// 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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uint32_t start = 0, end;
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do {
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// Find the range of style sheets with the same scope.
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Element* scope = sheets[start]->GetScopeElement();
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end = start + 1;
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while (end < count && sheets[end]->GetScopeElement() == scope) {
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end++;
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}
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scope->SetIsScopedStyleRoot();
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// Create a rule processor for the scope.
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nsTArray< nsRefPtr<nsCSSStyleSheet> > sheetsForScope;
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sheetsForScope.AppendElements(sheets.Elements() + start, end - start);
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mScopedDocSheetRuleProcessors.AppendElement
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(new nsCSSRuleProcessor(sheetsForScope, uint8_t(aType), scope));
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start = end;
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} while (start < count);
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}
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return NS_OK;
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}
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if (mSheets[aType].Count()) {
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switch (aType) {
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case eAgentSheet:
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case eUserSheet:
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case eDocSheet:
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case eOverrideSheet: {
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// levels containing CSS stylesheets (apart from eScopedDocSheet)
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nsCOMArray<nsIStyleSheet>& sheets = mSheets[aType];
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nsTArray<nsRefPtr<nsCSSStyleSheet> > cssSheets(sheets.Count());
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for (int32_t i = 0, i_end = sheets.Count(); i < i_end; ++i) {
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nsRefPtr<nsCSSStyleSheet> cssSheet = do_QueryObject(sheets[i]);
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NS_ASSERTION(cssSheet, "not a CSS sheet");
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cssSheets.AppendElement(cssSheet);
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}
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mRuleProcessors[aType] =
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new nsCSSRuleProcessor(cssSheets, uint8_t(aType), nullptr);
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} break;
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default:
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// levels containing non-CSS stylesheets
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NS_ASSERTION(mSheets[aType].Count() == 1, "only one sheet per level");
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mRuleProcessors[aType] = do_QueryInterface(mSheets[aType][0]);
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break;
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}
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}
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return NS_OK;
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}
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static bool
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IsScopedStyleSheet(nsIStyleSheet* aSheet)
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{
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nsRefPtr<nsCSSStyleSheet> cssSheet = do_QueryObject(aSheet);
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NS_ASSERTION(cssSheet, "expected aSheet to be an nsCSSStyleSheet");
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return cssSheet->GetScopeElement();
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}
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nsresult
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nsStyleSet::AppendStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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NS_ASSERTION(aSheet->IsApplicable(),
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"Inapplicable sheet being placed in style set");
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mSheets[aType].RemoveObject(aSheet);
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if (!mSheets[aType].AppendObject(aSheet))
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return NS_ERROR_OUT_OF_MEMORY;
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return DirtyRuleProcessors(aType);
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}
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nsresult
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nsStyleSet::PrependStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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NS_ASSERTION(aSheet->IsApplicable(),
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"Inapplicable sheet being placed in style set");
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mSheets[aType].RemoveObject(aSheet);
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if (!mSheets[aType].InsertObjectAt(aSheet, 0))
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return NS_ERROR_OUT_OF_MEMORY;
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return DirtyRuleProcessors(aType);
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}
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nsresult
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nsStyleSet::RemoveStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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NS_ASSERTION(aSheet->IsComplete(),
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"Incomplete sheet being removed from style set");
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mSheets[aType].RemoveObject(aSheet);
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return DirtyRuleProcessors(aType);
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}
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nsresult
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nsStyleSet::ReplaceSheets(sheetType aType,
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const nsCOMArray<nsIStyleSheet> &aNewSheets)
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{
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mSheets[aType].Clear();
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if (!mSheets[aType].AppendObjects(aNewSheets))
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return NS_ERROR_OUT_OF_MEMORY;
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return DirtyRuleProcessors(aType);
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}
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nsresult
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nsStyleSet::InsertStyleSheetBefore(sheetType aType, nsIStyleSheet *aNewSheet,
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nsIStyleSheet *aReferenceSheet)
|
|
{
|
|
NS_PRECONDITION(aNewSheet && aReferenceSheet, "null arg");
|
|
NS_ASSERTION(aNewSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
|
|
mSheets[aType].RemoveObject(aNewSheet);
|
|
int32_t idx = mSheets[aType].IndexOf(aReferenceSheet);
|
|
if (idx < 0)
|
|
return NS_ERROR_INVALID_ARG;
|
|
|
|
if (!mSheets[aType].InsertObjectAt(aNewSheet, idx))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return DirtyRuleProcessors(aType);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::DirtyRuleProcessors(sheetType aType)
|
|
{
|
|
if (!mBatching)
|
|
return GatherRuleProcessors(aType);
|
|
|
|
mDirty |= 1 << aType;
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::GetAuthorStyleDisabled()
|
|
{
|
|
return mAuthorStyleDisabled;
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::SetAuthorStyleDisabled(bool aStyleDisabled)
|
|
{
|
|
if (aStyleDisabled == !mAuthorStyleDisabled) {
|
|
mAuthorStyleDisabled = aStyleDisabled;
|
|
BeginUpdate();
|
|
mDirty |= 1 << eDocSheet |
|
|
1 << eScopedDocSheet |
|
|
1 << eStyleAttrSheet;
|
|
return EndUpdate();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// -------- Doc Sheets
|
|
|
|
nsresult
|
|
nsStyleSet::AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument)
|
|
{
|
|
NS_PRECONDITION(aSheet && aDocument, "null arg");
|
|
NS_ASSERTION(aSheet->IsApplicable(),
|
|
"Inapplicable sheet being placed in style set");
|
|
|
|
sheetType type = IsScopedStyleSheet(aSheet) ?
|
|
eScopedDocSheet :
|
|
eDocSheet;
|
|
nsCOMArray<nsIStyleSheet>& sheets = mSheets[type];
|
|
|
|
sheets.RemoveObject(aSheet);
|
|
nsStyleSheetService *sheetService = nsStyleSheetService::GetInstance();
|
|
|
|
// lowest index first
|
|
int32_t newDocIndex = aDocument->GetIndexOfStyleSheet(aSheet);
|
|
|
|
int32_t count = sheets.Count();
|
|
int32_t index;
|
|
for (index = 0; index < count; index++) {
|
|
nsIStyleSheet* sheet = sheets.ObjectAt(index);
|
|
int32_t sheetDocIndex = aDocument->GetIndexOfStyleSheet(sheet);
|
|
if (sheetDocIndex > newDocIndex)
|
|
break;
|
|
|
|
// If the sheet is not owned by the document it can be an author
|
|
// sheet registered at nsStyleSheetService or an additional author
|
|
// sheet on the document, which means the new
|
|
// doc sheet should end up before it.
|
|
if (sheetDocIndex < 0 &&
|
|
((sheetService &&
|
|
sheetService->AuthorStyleSheets()->IndexOf(sheet) >= 0) ||
|
|
sheet == aDocument->FirstAdditionalAuthorSheet()))
|
|
break;
|
|
}
|
|
if (!sheets.InsertObjectAt(aSheet, index))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return DirtyRuleProcessors(type);
|
|
}
|
|
|
|
nsresult
|
|
nsStyleSet::RemoveDocStyleSheet(nsIStyleSheet *aSheet)
|
|
{
|
|
nsRefPtr<nsCSSStyleSheet> cssSheet = do_QueryObject(aSheet);
|
|
bool isScoped = cssSheet && cssSheet->GetScopeElement();
|
|
return RemoveStyleSheet(isScoped ? eScopedDocSheet : eDocSheet, 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 (int i = 0; i < eSheetTypeCount; ++i) {
|
|
if (mDirty & (1 << i)) {
|
|
nsresult rv = GatherRuleProcessors(sheetType(i));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
mDirty = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsStyleSet::EnableQuirkStyleSheet(bool aEnable)
|
|
{
|
|
#ifdef DEBUG
|
|
bool oldEnabled;
|
|
{
|
|
nsCOMPtr<nsIDOMCSSStyleSheet> domSheet =
|
|
do_QueryInterface(mQuirkStyleSheet);
|
|
domSheet->GetDisabled(&oldEnabled);
|
|
oldEnabled = !oldEnabled;
|
|
}
|
|
#endif
|
|
mQuirkStyleSheet->SetEnabled(aEnable);
|
|
#ifdef DEBUG
|
|
// This should always be OK, since SetEnabled should call
|
|
// ClearRuleCascades.
|
|
// Note that we can hit this codepath multiple times when document.open()
|
|
// (potentially implied) happens multiple times.
|
|
if (mRuleProcessors[eAgentSheet] && aEnable != oldEnabled) {
|
|
static_cast<nsCSSRuleProcessor*>(static_cast<nsIStyleRuleProcessor*>(
|
|
mRuleProcessors[eAgentSheet]))->AssertQuirksChangeOK();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
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() == nsStyleSet::eTransitionSheet ||
|
|
aRuleNode->IsImportantRule());
|
|
}
|
|
|
|
static nsIStyleRule*
|
|
GetAnimationRule(nsRuleNode *aRuleNode)
|
|
{
|
|
nsRuleNode *n = aRuleNode;
|
|
while (IsMoreSpecificThanAnimation(n)) {
|
|
n = n->GetParent();
|
|
}
|
|
|
|
if (n->IsRoot() || n->GetLevel() != nsStyleSet::eAnimationSheet) {
|
|
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) {
|
|
NS_ABORT_IF_FALSE(n->GetRule() == aOldAnimRule, "wrong rule");
|
|
NS_ABORT_IF_FALSE(n->GetLevel() == nsStyleSet::eAnimationSheet,
|
|
"wrong level");
|
|
n = n->GetParent();
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(!IsMoreSpecificThanAnimation(n) &&
|
|
(n->IsRoot() ||
|
|
n->GetLevel() != nsStyleSet::eAnimationSheet),
|
|
"wrong level");
|
|
|
|
if (aNewAnimRule) {
|
|
n = n->Transition(aNewAnimRule, nsStyleSet::eAnimationSheet, false);
|
|
}
|
|
|
|
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,
|
|
nsCSSPseudoElements::Type aPseudoType,
|
|
Element* aElementForAnimation,
|
|
uint32_t aFlags)
|
|
{
|
|
NS_PRECONDITION((!aPseudoTag &&
|
|
aPseudoType ==
|
|
nsCSSPseudoElements::ePseudo_NotPseudoElement) ||
|
|
(aPseudoTag &&
|
|
nsCSSPseudoElements::GetPseudoType(aPseudoTag) ==
|
|
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;
|
|
}
|
|
|
|
nsRefPtr<nsStyleContext> result;
|
|
if (aParentContext)
|
|
result = aParentContext->FindChildWithRules(aPseudoTag, aRuleNode,
|
|
aVisitedRuleNode,
|
|
aFlags & eIsVisitedLink);
|
|
|
|
#ifdef NOISY_DEBUG
|
|
if (result)
|
|
fprintf(stdout, "--- SharedSC %d ---\n", ++gSharedCount);
|
|
else
|
|
fprintf(stdout, "+++ NewSC %d +++\n", ++gNewCount);
|
|
#endif
|
|
|
|
if (!result) {
|
|
result = NS_NewStyleContext(aParentContext, aPseudoTag, aPseudoType,
|
|
aRuleNode, aFlags & eSkipFlexItemStyleFixup);
|
|
if (aVisitedRuleNode) {
|
|
nsRefPtr<nsStyleContext> resultIfVisited =
|
|
NS_NewStyleContext(parentIfVisited, aPseudoTag, aPseudoType,
|
|
aVisitedRuleNode,
|
|
aFlags & eSkipFlexItemStyleFixup);
|
|
if (!parentIfVisited) {
|
|
mRoots.AppendElement(resultIfVisited);
|
|
}
|
|
resultIfVisited->SetIsStyleIfVisited();
|
|
result->SetStyleIfVisited(resultIfVisited.forget());
|
|
|
|
bool relevantLinkVisited = (aFlags & eIsLink) ?
|
|
(aFlags & eIsVisitedLink) :
|
|
(aParentContext && aParentContext->RelevantLinkVisited());
|
|
|
|
if (relevantLinkVisited) {
|
|
result->AddStyleBit(NS_STYLE_RELEVANT_LINK_VISITED);
|
|
}
|
|
}
|
|
if (!aParentContext) {
|
|
mRoots.AppendElement(result);
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERTION(result->GetPseudoType() == aPseudoType, "Unexpected type");
|
|
NS_ASSERTION(result->GetPseudo() == aPseudoTag, "Unexpected pseudo");
|
|
}
|
|
|
|
if (aFlags & eDoAnimation) {
|
|
// Normally the animation manager has already added the correct
|
|
// style rule. However, if the animation-name just changed, it
|
|
// might have been wrong. So ask it to double-check based on the
|
|
// resulting style context.
|
|
nsIStyleRule *oldAnimRule = GetAnimationRule(aRuleNode);
|
|
nsIStyleRule *animRule = PresContext()->AnimationManager()->
|
|
CheckAnimationRule(result, aElementForAnimation);
|
|
NS_ABORT_IF_FALSE(result->RuleNode() == aRuleNode,
|
|
"unexpected rule node");
|
|
NS_ABORT_IF_FALSE(!result->GetStyleIfVisited() == !aVisitedRuleNode,
|
|
"unexpected visited rule node");
|
|
NS_ABORT_IF_FALSE(!aVisitedRuleNode ||
|
|
result->GetStyleIfVisited()->RuleNode() ==
|
|
aVisitedRuleNode,
|
|
"unexpected visited rule node");
|
|
if (oldAnimRule != animRule) {
|
|
nsRuleNode *ruleNode =
|
|
ReplaceAnimationRule(aRuleNode, oldAnimRule, animRule);
|
|
nsRuleNode *visitedRuleNode = aVisitedRuleNode
|
|
? ReplaceAnimationRule(aVisitedRuleNode, oldAnimRule, animRule)
|
|
: nullptr;
|
|
result = GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
aPseudoTag, aPseudoType, nullptr,
|
|
aFlags & ~eDoAnimation);
|
|
}
|
|
}
|
|
|
|
if (aElementForAnimation && aElementForAnimation->IsHTML(nsGkAtoms::body) &&
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement &&
|
|
PresContext()->CompatibilityMode() == eCompatibility_NavQuirks) {
|
|
nsIDocument* doc = aElementForAnimation->GetCurrentDoc();
|
|
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?");
|
|
|
|
nsAutoTArray<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(nsRefPtr<css::StyleRule>(do_QueryObject(node->GetRule())),
|
|
"Unexpected non-CSS rule");
|
|
|
|
nsIStyleRule* impRule =
|
|
static_cast<css::StyleRule*>(node->GetRule())->GetImportantRule();
|
|
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()) {
|
|
nsRefPtr<css::StyleRule> rule(do_QueryObject(node->GetRule()));
|
|
NS_ASSERTION(rule, "Unexpected non-CSS rule");
|
|
|
|
NS_ASSERTION(!rule->GetImportantRule(), "Unexpected important rule");
|
|
}
|
|
}
|
|
|
|
void
|
|
nsStyleSet::AssertNoCSSRules(nsRuleNode* aCurrLevelNode,
|
|
nsRuleNode* aLastPrevLevelNode)
|
|
{
|
|
if (!aCurrLevelNode)
|
|
return;
|
|
|
|
for (nsRuleNode *node = aCurrLevelNode; node != aLastPrevLevelNode;
|
|
node = node->GetParent()) {
|
|
nsIStyleRule *rule = node->GetRule();
|
|
nsRefPtr<css::StyleRule> cssRule(do_QueryObject(rule));
|
|
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");
|
|
|
|
// Cascading order:
|
|
// [least important]
|
|
// - UA normal rules = Agent normal
|
|
// - User normal rules = User normal
|
|
// - Presentation hints = PresHint 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(eAgentSheet, false, true);
|
|
if (mRuleProcessors[eAgentSheet])
|
|
(*aCollectorFunc)(mRuleProcessors[eAgentSheet], aData);
|
|
nsRuleNode* lastAgentRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantUARules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(eUserSheet, false, true);
|
|
bool skipUserStyles =
|
|
aElement && aElement->IsInNativeAnonymousSubtree();
|
|
if (!skipUserStyles && mRuleProcessors[eUserSheet]) // NOTE: different
|
|
(*aCollectorFunc)(mRuleProcessors[eUserSheet], aData);
|
|
nsRuleNode* lastUserRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantUserRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(ePresHintSheet, false, false);
|
|
if (mRuleProcessors[ePresHintSheet])
|
|
(*aCollectorFunc)(mRuleProcessors[ePresHintSheet], aData);
|
|
nsRuleNode* lastPresHintRN = aRuleWalker->CurrentNode();
|
|
|
|
aRuleWalker->SetLevel(eDocSheet, 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[eDocSheet])
|
|
(*aCollectorFunc)(mRuleProcessors[eDocSheet], 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(eScopedDocSheet, 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(eStyleAttrSheet, false, true);
|
|
if (mRuleProcessors[eStyleAttrSheet])
|
|
(*aCollectorFunc)(mRuleProcessors[eStyleAttrSheet], aData);
|
|
nsRuleNode* lastStyleAttrRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantStyleAttrRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
aRuleWalker->SetLevel(eOverrideSheet, false, true);
|
|
if (mRuleProcessors[eOverrideSheet])
|
|
(*aCollectorFunc)(mRuleProcessors[eOverrideSheet], aData);
|
|
nsRuleNode* lastOvrRN = aRuleWalker->CurrentNode();
|
|
bool haveImportantOverrideRules = !aRuleWalker->GetCheckForImportantRules();
|
|
|
|
// This needs to match IsMoreSpecificThanAnimation() above.
|
|
aRuleWalker->SetLevel(eAnimationSheet, false, false);
|
|
(*aCollectorFunc)(mRuleProcessors[eAnimationSheet], aData);
|
|
|
|
if (haveAnyImportantScopedRules) {
|
|
for (uint32_t i = lastScopedRNs.Length(); i-- != 0; ) {
|
|
aRuleWalker->SetLevel(eScopedDocSheet, 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(eDocSheet, true, false);
|
|
AddImportantRules(lastDocRN, lastPresHintRN, aRuleWalker); // doc
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastDocRN, lastPresHintRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantStyleAttrRules) {
|
|
aRuleWalker->SetLevel(eStyleAttrSheet, true, false);
|
|
AddImportantRules(lastStyleAttrRN, lastScopedRN, aRuleWalker); // style attr
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastStyleAttrRN, lastScopedRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantOverrideRules) {
|
|
aRuleWalker->SetLevel(eOverrideSheet, true, false);
|
|
AddImportantRules(lastOvrRN, lastStyleAttrRN, aRuleWalker); // override
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastOvrRN, lastStyleAttrRN);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
AssertNoCSSRules(lastPresHintRN, lastUserRN);
|
|
#endif
|
|
|
|
if (haveImportantUserRules) {
|
|
aRuleWalker->SetLevel(eUserSheet, true, false);
|
|
AddImportantRules(lastUserRN, lastAgentRN, aRuleWalker); //user
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
AssertNoImportantRules(lastUserRN, lastAgentRN);
|
|
}
|
|
#endif
|
|
|
|
if (haveImportantUARules) {
|
|
aRuleWalker->SetLevel(eAgentSheet, 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(eTransitionSheet, false, false);
|
|
(*aCollectorFunc)(mRuleProcessors[eTransitionSheet], 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)
|
|
{
|
|
if (mRuleProcessors[eAgentSheet])
|
|
(*aFunc)(mRuleProcessors[eAgentSheet], aData);
|
|
|
|
bool skipUserStyles = aData->mElement->IsInNativeAnonymousSubtree();
|
|
if (!skipUserStyles && mRuleProcessors[eUserSheet]) // NOTE: different
|
|
(*aFunc)(mRuleProcessors[eUserSheet], aData);
|
|
|
|
if (mRuleProcessors[ePresHintSheet])
|
|
(*aFunc)(mRuleProcessors[ePresHintSheet], 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[eDocSheet]) // NOTE: different
|
|
(*aFunc)(mRuleProcessors[eDocSheet], aData);
|
|
if (aData->mElement->IsElementInStyleScope()) {
|
|
for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); i++)
|
|
(*aFunc)(mScopedDocSheetRuleProcessors[i], aData);
|
|
}
|
|
}
|
|
if (mRuleProcessors[eStyleAttrSheet])
|
|
(*aFunc)(mRuleProcessors[eStyleAttrSheet], aData);
|
|
if (mRuleProcessors[eOverrideSheet])
|
|
(*aFunc)(mRuleProcessors[eOverrideSheet], aData);
|
|
(*aFunc)(mRuleProcessors[eAnimationSheet], aData);
|
|
(*aFunc)(mRuleProcessors[eTransitionSheet], aData);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleFor(Element* aElement,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aElement->OwnerDoc());
|
|
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.mSkippingFlexItemStyleFixup) {
|
|
flags |= eSkipFlexItemStyleFixup;
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
nullptr, nsCSSPseudoElements::ePseudo_NotPseudoElement,
|
|
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(eDocSheet, false, false);
|
|
for (uint32_t i = 0; i < aRules.Length(); i++) {
|
|
ruleWalker.ForwardOnPossiblyCSSRule(aRules.ElementAt(i));
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleWalker.CurrentNode(), nullptr,
|
|
nullptr, nsCSSPseudoElements::ePseudo_NotPseudoElement,
|
|
nullptr, eNoFlags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForRules(nsStyleContext* aParentContext,
|
|
nsStyleContext* aOldStyle,
|
|
const nsTArray<RuleAndLevel>& aRules)
|
|
{
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
for (int32_t i = aRules.Length() - 1; i >= 0; --i) {
|
|
ruleWalker.SetLevel(aRules[i].mLevel, false, false);
|
|
ruleWalker.ForwardOnPossiblyCSSRule(aRules[i].mRule);
|
|
}
|
|
|
|
uint32_t flags = eNoFlags;
|
|
if (aOldStyle->IsLinkContext()) {
|
|
flags |= eIsLink;
|
|
}
|
|
if (aOldStyle->RelevantLinkVisited()) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleWalker.CurrentNode(), nullptr,
|
|
nullptr, nsCSSPseudoElements::ePseudo_NotPseudoElement,
|
|
nullptr, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleByAddingRules(nsStyleContext* aBaseContext,
|
|
const nsCOMArray<nsIStyleRule> &aRules)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
ruleWalker.SetCurrentNode(aBaseContext->RuleNode());
|
|
// FIXME: Perhaps this should be passed in, but it probably doesn't
|
|
// matter.
|
|
ruleWalker.SetLevel(eDocSheet, 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;
|
|
}
|
|
if (aBaseContext->RelevantLinkVisited()) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
return GetContext(aBaseContext->GetParent(), ruleNode, visitedRuleNode,
|
|
aBaseContext->GetPseudo(),
|
|
aBaseContext->GetPseudoType(),
|
|
nullptr, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForNonElement(nsStyleContext* aParentContext)
|
|
{
|
|
return GetContext(aParentContext, mRuleTree, nullptr,
|
|
nsCSSAnonBoxes::mozNonElement,
|
|
nsCSSPseudoElements::ePseudo_AnonBox, nullptr,
|
|
eNoFlags);
|
|
}
|
|
|
|
void
|
|
nsStyleSet::WalkRestrictionRule(nsCSSPseudoElements::Type aPseudoType,
|
|
nsRuleWalker* aRuleWalker)
|
|
{
|
|
// This needs to match GetPseudoRestriction in nsRuleNode.cpp.
|
|
aRuleWalker->SetLevel(eAgentSheet, false, false);
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_firstLetter)
|
|
aRuleWalker->Forward(mFirstLetterRule);
|
|
else if (aPseudoType == nsCSSPseudoElements::ePseudo_firstLine)
|
|
aRuleWalker->Forward(mFirstLineRule);
|
|
else if (aPseudoType == nsCSSPseudoElements::ePseudo_mozPlaceholder)
|
|
aRuleWalker->Forward(mPlaceholderRule);
|
|
}
|
|
|
|
void
|
|
nsStyleSet::WalkDisableTextZoomRule(Element* aElement, nsRuleWalker* aRuleWalker)
|
|
{
|
|
aRuleWalker->SetLevel(eAgentSheet, false, false);
|
|
if (aElement->IsSVG(nsGkAtoms::text))
|
|
aRuleWalker->Forward(mDisableTextZoomStyleRule);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolvePseudoElementStyle(Element* aParentElement,
|
|
nsCSSPseudoElements::Type aType,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
NS_ASSERTION(aType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"must have pseudo element type");
|
|
NS_ASSERTION(aParentElement, "Must have parent element");
|
|
|
|
nsRuleWalker ruleWalker(mRuleTree, mAuthorStyleDisabled);
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aParentElement->OwnerDoc());
|
|
PseudoElementRuleProcessorData data(PresContext(), aParentElement,
|
|
&ruleWalker, aType, treeContext);
|
|
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 == nsCSSPseudoElements::ePseudo_before ||
|
|
aType == nsCSSPseudoElements::ePseudo_after) {
|
|
flags |= eDoAnimation;
|
|
} else {
|
|
// Flex 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 container, and we should skip flex-item style fixup.
|
|
flags |= eSkipFlexItemStyleFixup;
|
|
}
|
|
|
|
return GetContext(aParentContext, ruleNode, visitedRuleNode,
|
|
nsCSSPseudoElements::GetPseudoAtom(aType), aType,
|
|
aParentElement, flags);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
nsCSSPseudoElements::Type aType,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
TreeMatchContext treeContext(true, nsRuleWalker::eRelevantLinkUnvisited,
|
|
aParentElement->OwnerDoc());
|
|
return ProbePseudoElementStyle(aParentElement, aType, aParentContext,
|
|
treeContext);
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ProbePseudoElementStyle(Element* aParentElement,
|
|
nsCSSPseudoElements::Type aType,
|
|
nsStyleContext* aParentContext,
|
|
TreeMatchContext& aTreeMatchContext)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
NS_ASSERTION(aType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"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);
|
|
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 == nsCSSPseudoElements::ePseudo_before ||
|
|
aType == nsCSSPseudoElements::ePseudo_after) {
|
|
flags |= eDoAnimation;
|
|
} else {
|
|
// Flex 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 container, and we should skip flex-item style fixup.
|
|
flags |= eSkipFlexItemStyleFixup;
|
|
}
|
|
|
|
nsRefPtr<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 == NS_STYLE_DISPLAY_NONE ||
|
|
content->ContentCount() == 0) {
|
|
result = nullptr;
|
|
}
|
|
}
|
|
|
|
return result.forget();
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveAnonymousBoxStyle(nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
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::ImportantRule*> importantRules;
|
|
nsPresContext* presContext = PresContext();
|
|
presContext->StyleSet()->AppendPageRules(presContext, rules);
|
|
for (uint32_t i = 0, i_end = rules.Length(); i != i_end; ++i) {
|
|
ruleWalker.Forward(rules[i]);
|
|
css::ImportantRule* importantRule = rules[i]->GetImportantRule();
|
|
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, nsCSSPseudoElements::ePseudo_AnonBox,
|
|
nullptr, eNoFlags);
|
|
}
|
|
|
|
#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());
|
|
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, nsCSSPseudoElements::ePseudo_XULTree,
|
|
nullptr, eNoFlags);
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
nsStyleSet::AppendFontFaceRules(nsPresContext* aPresContext,
|
|
nsTArray<nsFontFaceRuleContainer>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
|
|
for (uint32_t i = 0; i < ArrayLength(gCSSSheetTypes); ++i) {
|
|
if (gCSSSheetTypes[i] == eScopedDocSheet)
|
|
continue;
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc && !ruleProc->AppendFontFaceRules(aPresContext, aArray))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
nsCSSKeyframesRule*
|
|
nsStyleSet::KeyframesRuleForName(nsPresContext* aPresContext,
|
|
const nsString& aName)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nullptr);
|
|
|
|
for (uint32_t i = ArrayLength(gCSSSheetTypes); i-- != 0; ) {
|
|
if (gCSSSheetTypes[i] == eScopedDocSheet)
|
|
continue;
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (!ruleProc)
|
|
continue;
|
|
nsCSSKeyframesRule* result =
|
|
ruleProc->KeyframesRuleForName(aPresContext, aName);
|
|
if (result)
|
|
return result;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::AppendFontFeatureValuesRules(nsPresContext* aPresContext,
|
|
nsTArray<nsCSSFontFeatureValuesRule*>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
|
|
for (uint32_t i = 0; i < NS_ARRAY_LENGTH(gCSSSheetTypes); ++i) {
|
|
nsCSSRuleProcessor *ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc &&
|
|
!ruleProc->AppendFontFeatureValuesRules(aPresContext, aArray))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<gfxFontFeatureValueSet>
|
|
nsStyleSet::GetFontFeatureValuesLookup()
|
|
{
|
|
if (mInitFontFeatureValuesLookup) {
|
|
mInitFontFeatureValuesLookup = false;
|
|
|
|
nsTArray<nsCSSFontFeatureValuesRule*> rules;
|
|
AppendFontFeatureValuesRules(PresContext(), rules);
|
|
|
|
mFontFeatureValuesLookup = new gfxFontFeatureValueSet();
|
|
|
|
uint32_t i, numRules = rules.Length();
|
|
for (i = 0; i < numRules; i++) {
|
|
nsCSSFontFeatureValuesRule *rule = rules[i];
|
|
|
|
const nsTArray<nsString>& familyList = rule->GetFamilyList();
|
|
const nsTArray<gfxFontFeatureValueSet::FeatureValues>&
|
|
featureValues = rule->GetFeatureValues();
|
|
|
|
// for each family
|
|
uint32_t f, numFam;
|
|
|
|
numFam = familyList.Length();
|
|
for (f = 0; f < numFam; f++) {
|
|
const nsString& family = familyList.ElementAt(f);
|
|
nsAutoString silly(family);
|
|
mFontFeatureValuesLookup->AddFontFeatureValues(silly, featureValues);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsRefPtr<gfxFontFeatureValueSet> lookup = mFontFeatureValuesLookup;
|
|
return lookup.forget();
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::AppendPageRules(nsPresContext* aPresContext,
|
|
nsTArray<nsCSSPageRule*>& aArray)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, false);
|
|
|
|
for (uint32_t i = 0; i < NS_ARRAY_LENGTH(gCSSSheetTypes); ++i) {
|
|
if (gCSSSheetTypes[i] == eScopedDocSheet)
|
|
continue;
|
|
nsCSSRuleProcessor* ruleProc = static_cast<nsCSSRuleProcessor*>
|
|
(mRuleProcessors[gCSSSheetTypes[i]].get());
|
|
if (ruleProc && !ruleProc->AppendPageRules(aPresContext, aArray))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsStyleSet::BeginShutdown(nsPresContext* aPresContext)
|
|
{
|
|
mInShutdown = 1;
|
|
mRoots.Clear(); // no longer valid, since we won't keep it up to date
|
|
}
|
|
|
|
void
|
|
nsStyleSet::Shutdown(nsPresContext* aPresContext)
|
|
{
|
|
mRuleTree->Destroy();
|
|
mRuleTree = nullptr;
|
|
|
|
// We can have old rule trees either because:
|
|
// (1) we failed the assertions in EndReconstruct, or
|
|
// (2) we're shutting down within a reconstruct (see bug 462392)
|
|
for (uint32_t i = mOldRuleTrees.Length(); i > 0; ) {
|
|
--i;
|
|
mOldRuleTrees[i]->Destroy();
|
|
}
|
|
mOldRuleTrees.Clear();
|
|
}
|
|
|
|
static const uint32_t kGCInterval = 300;
|
|
|
|
void
|
|
nsStyleSet::NotifyStyleContextDestroyed(nsPresContext* aPresContext,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
if (mInShutdown)
|
|
return;
|
|
|
|
// Remove style contexts from mRoots even if mOldRuleTree is non-null. This
|
|
// could be a style context from the new ruletree!
|
|
if (!aStyleContext->GetParent()) {
|
|
mRoots.RemoveElement(aStyleContext);
|
|
}
|
|
|
|
if (mInReconstruct)
|
|
return;
|
|
|
|
if (mUnusedRuleNodeCount >= kGCInterval) {
|
|
GCRuleTrees();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsStyleSet::GCRuleTrees()
|
|
{
|
|
mUnusedRuleNodeCount = 0;
|
|
|
|
// Mark the style context tree by marking all style contexts which
|
|
// have no parent, which will mark all descendants. This will reach
|
|
// style contexts in the undisplayed map and "additional style
|
|
// contexts" since they are descendants of the roots.
|
|
for (int32_t i = mRoots.Length() - 1; i >= 0; --i) {
|
|
mRoots[i]->Mark();
|
|
}
|
|
|
|
// Sweep the rule tree.
|
|
#ifdef DEBUG
|
|
bool deleted =
|
|
#endif
|
|
mRuleTree->Sweep();
|
|
NS_ASSERTION(!deleted, "Root node must not be gc'd");
|
|
|
|
// Sweep the old rule trees.
|
|
for (uint32_t i = mOldRuleTrees.Length(); i > 0; ) {
|
|
--i;
|
|
if (mOldRuleTrees[i]->Sweep()) {
|
|
// It was deleted, as it should be.
|
|
mOldRuleTrees.RemoveElementAt(i);
|
|
} else {
|
|
NS_NOTREACHED("old rule tree still referenced");
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline nsRuleNode*
|
|
SkipAnimationRules(nsRuleNode* aRuleNode, Element* aElement, bool isPseudo)
|
|
{
|
|
nsRuleNode* ruleNode = aRuleNode;
|
|
while (!ruleNode->IsRoot() &&
|
|
(ruleNode->GetLevel() == nsStyleSet::eTransitionSheet ||
|
|
ruleNode->GetLevel() == nsStyleSet::eAnimationSheet)) {
|
|
ruleNode = ruleNode->GetParent();
|
|
}
|
|
if (ruleNode != aRuleNode) {
|
|
NS_ASSERTION(aElement, "How can we have transition rules but no element?");
|
|
// Need to do an animation restyle, just like
|
|
// nsTransitionManager::WalkTransitionRule and
|
|
// nsAnimationManager::GetAnimationRule would.
|
|
nsRestyleHint hint = isPseudo ? eRestyle_Subtree : eRestyle_Self;
|
|
aRuleNode->PresContext()->PresShell()->RestyleForAnimation(aElement, hint);
|
|
}
|
|
return ruleNode;
|
|
}
|
|
|
|
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 TryStartingTransition
|
|
// during style reresolution if the style context pointer hasn't changed.
|
|
if (aStyleContext->GetParent() == aNewParentContext) {
|
|
nsRefPtr<nsStyleContext> ret = aStyleContext;
|
|
return ret.forget();
|
|
}
|
|
|
|
nsIAtom* pseudoTag = aStyleContext->GetPseudo();
|
|
nsCSSPseudoElements::Type pseudoType = aStyleContext->GetPseudoType();
|
|
nsRuleNode* ruleNode = aStyleContext->RuleNode();
|
|
|
|
// Skip transition rules as needed just like
|
|
// nsTransitionManager::WalkTransitionRule would.
|
|
bool skipAnimationRules = PresContext()->IsProcessingRestyles() &&
|
|
!PresContext()->IsProcessingAnimationStyleChange();
|
|
if (skipAnimationRules) {
|
|
// Make sure that we're not using transition rules or animation rules for
|
|
// our new style context. If we need them, an animation restyle will
|
|
// provide.
|
|
ruleNode =
|
|
SkipAnimationRules(ruleNode, aElement,
|
|
pseudoType !=
|
|
nsCSSPseudoElements::ePseudo_NotPseudoElement);
|
|
}
|
|
|
|
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();
|
|
// Again, skip transition rules as needed
|
|
if (skipAnimationRules) {
|
|
// FIXME do something here for animations?
|
|
visitedRuleNode =
|
|
SkipAnimationRules(visitedRuleNode, aElement,
|
|
pseudoType !=
|
|
nsCSSPseudoElements::ePseudo_NotPseudoElement);
|
|
}
|
|
}
|
|
|
|
uint32_t flags = eNoFlags;
|
|
if (aStyleContext->IsLinkContext()) {
|
|
flags |= eIsLink;
|
|
}
|
|
|
|
// If we're a style context for a link, then we already know whether
|
|
// our relevant link is visited, since that does not depend on our
|
|
// parent. Otherwise, we need to match aNewParentContext.
|
|
bool relevantLinkVisited = aStyleContext->IsLinkContext() ?
|
|
aStyleContext->RelevantLinkVisited() :
|
|
aNewParentContext->RelevantLinkVisited();
|
|
|
|
if (relevantLinkVisited) {
|
|
flags |= eIsVisitedLink;
|
|
}
|
|
|
|
if (pseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ||
|
|
pseudoType == nsCSSPseudoElements::ePseudo_before ||
|
|
pseudoType == nsCSSPseudoElements::ePseudo_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 container. (If the parent
|
|
// has anonymous-subtree kids, then we know it's not actually going to get
|
|
// a flex container frame, anyway.)
|
|
flags |= eSkipFlexItemStyleFixup;
|
|
}
|
|
|
|
return GetContext(aNewParentContext, ruleNode, visitedRuleNode,
|
|
pseudoTag, pseudoType,
|
|
aElement, flags);
|
|
}
|
|
|
|
struct MOZ_STACK_CLASS StatefulData : public StateRuleProcessorData {
|
|
StatefulData(nsPresContext* aPresContext, Element* aElement,
|
|
nsEventStates aStateMask, TreeMatchContext& aTreeMatchContext)
|
|
: StateRuleProcessorData(aPresContext, aElement, aStateMask,
|
|
aTreeMatchContext),
|
|
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(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsEventStates aStateMask)
|
|
{
|
|
if (!aContent || !aContent->IsElement())
|
|
return false;
|
|
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aContent->OwnerDoc());
|
|
StatefulData data(aPresContext, 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
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsRestyleHint
|
|
nsStyleSet::HasStateDependentStyle(nsPresContext* aPresContext,
|
|
Element* aElement,
|
|
nsEventStates aStateMask)
|
|
{
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aElement->OwnerDoc());
|
|
StatefulData data(aPresContext, aElement, aStateMask, treeContext);
|
|
WalkRuleProcessors(SheetHasStatefulStyle, &data, false);
|
|
return data.mHint;
|
|
}
|
|
|
|
struct MOZ_STACK_CLASS AttributeData : public AttributeRuleProcessorData {
|
|
AttributeData(nsPresContext* aPresContext,
|
|
Element* aElement, nsIAtom* aAttribute, int32_t aModType,
|
|
bool aAttrHasChanged, TreeMatchContext& aTreeMatchContext)
|
|
: AttributeRuleProcessorData(aPresContext, aElement, aAttribute, aModType,
|
|
aAttrHasChanged, aTreeMatchContext),
|
|
mHint(nsRestyleHint(0))
|
|
{}
|
|
nsRestyleHint mHint;
|
|
};
|
|
|
|
static bool
|
|
SheetHasAttributeStyle(nsIStyleRuleProcessor* aProcessor, void *aData)
|
|
{
|
|
AttributeData* data = (AttributeData*)aData;
|
|
nsRestyleHint hint = aProcessor->HasAttributeDependentStyle(data);
|
|
data->mHint = nsRestyleHint(data->mHint | hint);
|
|
return true; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsRestyleHint
|
|
nsStyleSet::HasAttributeDependentStyle(nsPresContext* aPresContext,
|
|
Element* aElement,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType,
|
|
bool aAttrHasChanged)
|
|
{
|
|
TreeMatchContext treeContext(false, nsRuleWalker::eLinksVisitedOrUnvisited,
|
|
aElement->OwnerDoc());
|
|
AttributeData data(aPresContext, aElement, aAttribute,
|
|
aModType, aAttrHasChanged, treeContext);
|
|
WalkRuleProcessors(SheetHasAttributeStyle, &data, false);
|
|
return data.mHint;
|
|
}
|
|
|
|
bool
|
|
nsStyleSet::MediumFeaturesChanged(nsPresContext* aPresContext)
|
|
{
|
|
// We can't use WalkRuleProcessors without a content node.
|
|
bool stylesChanged = false;
|
|
for (uint32_t i = 0; i < ArrayLength(mRuleProcessors); ++i) {
|
|
nsIStyleRuleProcessor *processor = mRuleProcessors[i];
|
|
if (!processor) {
|
|
continue;
|
|
}
|
|
bool thisChanged = processor->MediumFeaturesChanged(aPresContext);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
for (uint32_t i = 0; i < mScopedDocSheetRuleProcessors.Length(); ++i) {
|
|
nsIStyleRuleProcessor *processor = mScopedDocSheetRuleProcessors[i];
|
|
bool thisChanged = processor->MediumFeaturesChanged(aPresContext);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
|
|
if (mBindingManager) {
|
|
bool thisChanged = false;
|
|
mBindingManager->MediumFeaturesChanged(aPresContext, &thisChanged);
|
|
stylesChanged = stylesChanged || thisChanged;
|
|
}
|
|
|
|
return stylesChanged;
|
|
}
|
|
|
|
nsCSSStyleSheet::EnsureUniqueInnerResult
|
|
nsStyleSet::EnsureUniqueInnerOnCSSSheets()
|
|
{
|
|
nsAutoTArray<nsCSSStyleSheet*, 32> queue;
|
|
for (uint32_t i = 0; i < ArrayLength(gCSSSheetTypes); ++i) {
|
|
nsCOMArray<nsIStyleSheet> &sheets = mSheets[gCSSSheetTypes[i]];
|
|
for (uint32_t j = 0, j_end = sheets.Count(); j < j_end; ++j) {
|
|
nsCSSStyleSheet *sheet = static_cast<nsCSSStyleSheet*>(sheets[j]);
|
|
if (!queue.AppendElement(sheet)) {
|
|
return nsCSSStyleSheet::eUniqueInner_CloneFailed;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mBindingManager) {
|
|
mBindingManager->AppendAllSheets(queue);
|
|
}
|
|
|
|
nsCSSStyleSheet::EnsureUniqueInnerResult res =
|
|
nsCSSStyleSheet::eUniqueInner_AlreadyUnique;
|
|
while (!queue.IsEmpty()) {
|
|
uint32_t idx = queue.Length() - 1;
|
|
nsCSSStyleSheet *sheet = queue[idx];
|
|
queue.RemoveElementAt(idx);
|
|
|
|
nsCSSStyleSheet::EnsureUniqueInnerResult sheetRes =
|
|
sheet->EnsureUniqueInner();
|
|
if (sheetRes == nsCSSStyleSheet::eUniqueInner_CloneFailed) {
|
|
return sheetRes;
|
|
}
|
|
if (sheetRes == nsCSSStyleSheet::eUniqueInner_ClonedInner) {
|
|
res = sheetRes;
|
|
}
|
|
|
|
// Enqueue all the sheet's children.
|
|
if (!sheet->AppendAllChildSheets(queue)) {
|
|
return nsCSSStyleSheet::eUniqueInner_CloneFailed;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
nsIStyleRule*
|
|
nsStyleSet::InitialStyleRule()
|
|
{
|
|
if (!mInitialStyleRule) {
|
|
mInitialStyleRule = new nsInitialStyleRule;
|
|
}
|
|
return mInitialStyleRule;
|
|
}
|