1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsHTMLCSSStyleSheet.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,187 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * style sheet and style rule processor representing style attributes
1.11 + */
1.12 +
1.13 +#include "nsHTMLCSSStyleSheet.h"
1.14 +#include "mozilla/MemoryReporting.h"
1.15 +#include "mozilla/css/StyleRule.h"
1.16 +#include "nsIStyleRuleProcessor.h"
1.17 +#include "nsPresContext.h"
1.18 +#include "nsRuleWalker.h"
1.19 +#include "nsRuleProcessorData.h"
1.20 +#include "mozilla/dom/Element.h"
1.21 +#include "nsAttrValue.h"
1.22 +#include "nsAttrValueInlines.h"
1.23 +
1.24 +using namespace mozilla;
1.25 +using namespace mozilla::dom;
1.26 +
1.27 +namespace {
1.28 +
1.29 +PLDHashOperator
1.30 +ClearAttrCache(const nsAString& aKey, MiscContainer*& aValue, void*)
1.31 +{
1.32 + // Ideally we'd just call MiscContainer::Evict, but we can't do that since
1.33 + // we're iterating the hashtable.
1.34 + MOZ_ASSERT(aValue->mType == nsAttrValue::eCSSStyleRule);
1.35 +
1.36 + aValue->mValue.mCSSStyleRule->SetHTMLCSSStyleSheet(nullptr);
1.37 + aValue->mValue.mCached = 0;
1.38 +
1.39 + return PL_DHASH_REMOVE;
1.40 +}
1.41 +
1.42 +} // anonymous namespace
1.43 +
1.44 +nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet()
1.45 +{
1.46 +}
1.47 +
1.48 +nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet()
1.49 +{
1.50 + // We may go away before all of our cached style attributes do,
1.51 + // so clean up any that are left.
1.52 + mCachedStyleAttrs.Enumerate(ClearAttrCache, nullptr);
1.53 +}
1.54 +
1.55 +NS_IMPL_ISUPPORTS(nsHTMLCSSStyleSheet, nsIStyleRuleProcessor)
1.56 +
1.57 +/* virtual */ void
1.58 +nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
1.59 +{
1.60 + Element* element = aData->mElement;
1.61 +
1.62 + // just get the one and only style rule from the content's STYLE attribute
1.63 + css::StyleRule* rule = element->GetInlineStyleRule();
1.64 + if (rule) {
1.65 + rule->RuleMatched();
1.66 + aData->mRuleWalker->Forward(rule);
1.67 + }
1.68 +
1.69 + rule = element->GetSMILOverrideStyleRule();
1.70 + if (rule) {
1.71 + if (aData->mPresContext->IsProcessingRestyles() &&
1.72 + !aData->mPresContext->IsProcessingAnimationStyleChange()) {
1.73 + // Non-animation restyle -- don't process SMIL override style, because we
1.74 + // don't want SMIL animation to trigger new CSS transitions. Instead,
1.75 + // request an Animation restyle, so we still get noticed.
1.76 + aData->mPresContext->PresShell()->RestyleForAnimation(element,
1.77 + eRestyle_Self);
1.78 + } else {
1.79 + // Animation restyle (or non-restyle traversal of rules)
1.80 + // Now we can walk SMIL overrride style, without triggering transitions.
1.81 + rule->RuleMatched();
1.82 + aData->mRuleWalker->Forward(rule);
1.83 + }
1.84 + }
1.85 +}
1.86 +
1.87 +/* virtual */ void
1.88 +nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
1.89 +{
1.90 + if (nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aData->mPseudoType)) {
1.91 + MOZ_ASSERT(aData->mPseudoElement,
1.92 + "If pseudo element is supposed to support style attribute, it must "
1.93 + "have a pseudo element set");
1.94 +
1.95 + // just get the one and only style rule from the content's STYLE attribute
1.96 + css::StyleRule* rule = aData->mPseudoElement->GetInlineStyleRule();
1.97 + if (rule) {
1.98 + rule->RuleMatched();
1.99 + aData->mRuleWalker->Forward(rule);
1.100 + }
1.101 + }
1.102 +}
1.103 +
1.104 +/* virtual */ void
1.105 +nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
1.106 +{
1.107 +}
1.108 +
1.109 +#ifdef MOZ_XUL
1.110 +/* virtual */ void
1.111 +nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
1.112 +{
1.113 +}
1.114 +#endif
1.115 +
1.116 +// Test if style is dependent on content state
1.117 +/* virtual */ nsRestyleHint
1.118 +nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
1.119 +{
1.120 + return nsRestyleHint(0);
1.121 +}
1.122 +
1.123 +/* virtual */ nsRestyleHint
1.124 +nsHTMLCSSStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
1.125 +{
1.126 + return nsRestyleHint(0);
1.127 +}
1.128 +
1.129 +/* virtual */ bool
1.130 +nsHTMLCSSStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
1.131 +{
1.132 + return false;
1.133 +}
1.134 +
1.135 +// Test if style is dependent on attribute
1.136 +/* virtual */ nsRestyleHint
1.137 +nsHTMLCSSStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
1.138 +{
1.139 + // Perhaps should check that it's XUL, SVG, (or HTML) namespace, but
1.140 + // it doesn't really matter.
1.141 + if (aData->mAttrHasChanged && aData->mAttribute == nsGkAtoms::style) {
1.142 + return eRestyle_Self;
1.143 + }
1.144 +
1.145 + return nsRestyleHint(0);
1.146 +}
1.147 +
1.148 +/* virtual */ bool
1.149 +nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
1.150 +{
1.151 + return false;
1.152 +}
1.153 +
1.154 +/* virtual */ size_t
1.155 +nsHTMLCSSStyleSheet::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.156 +{
1.157 + return 0;
1.158 +}
1.159 +
1.160 +/* virtual */ size_t
1.161 +nsHTMLCSSStyleSheet::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.162 +{
1.163 + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
1.164 +}
1.165 +
1.166 +void
1.167 +nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized,
1.168 + MiscContainer* aValue)
1.169 +{
1.170 + mCachedStyleAttrs.Put(aSerialized, aValue);
1.171 +}
1.172 +
1.173 +void
1.174 +nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized,
1.175 + MiscContainer* aValue)
1.176 +{
1.177 +#ifdef DEBUG
1.178 + {
1.179 + NS_ASSERTION(aValue = mCachedStyleAttrs.Get(aSerialized),
1.180 + "Cached value does not match?!");
1.181 + }
1.182 +#endif
1.183 + mCachedStyleAttrs.Remove(aSerialized);
1.184 +}
1.185 +
1.186 +MiscContainer*
1.187 +nsHTMLCSSStyleSheet::LookupStyleAttr(const nsAString& aSerialized)
1.188 +{
1.189 + return mCachedStyleAttrs.Get(aSerialized);
1.190 +}
