The Tor Browser / file comparison
comparison: layout/style/nsHTMLCSSStyleSheet.cpp
layout/style/nsHTMLCSSStyleSheet.cpp
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
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| -1:000000000000 | 0:c41f9899437f |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* | |
| 7 * style sheet and style rule processor representing style attributes | |
| 8 */ | |
| 9 | |
| 10 #include "nsHTMLCSSStyleSheet.h" | |
| 11 #include "mozilla/MemoryReporting.h" | |
| 12 #include "mozilla/css/StyleRule.h" | |
| 13 #include "nsIStyleRuleProcessor.h" | |
| 14 #include "nsPresContext.h" | |
| 15 #include "nsRuleWalker.h" | |
| 16 #include "nsRuleProcessorData.h" | |
| 17 #include "mozilla/dom/Element.h" | |
| 18 #include "nsAttrValue.h" | |
| 19 #include "nsAttrValueInlines.h" | |
| 20 | |
| 21 using namespace mozilla; | |
| 22 using namespace mozilla::dom; | |
| 23 | |
| 24 namespace { | |
| 25 | |
| 26 PLDHashOperator | |
| 27 ClearAttrCache(const nsAString& aKey, MiscContainer*& aValue, void*) | |
| 28 { | |
| 29 // Ideally we'd just call MiscContainer::Evict, but we can't do that since | |
| 30 // we're iterating the hashtable. | |
| 31 MOZ_ASSERT(aValue->mType == nsAttrValue::eCSSStyleRule); | |
| 32 | |
| 33 aValue->mValue.mCSSStyleRule->SetHTMLCSSStyleSheet(nullptr); | |
| 34 aValue->mValue.mCached = 0; | |
| 35 | |
| 36 return PL_DHASH_REMOVE; | |
| 37 } | |
| 38 | |
| 39 } // anonymous namespace | |
| 40 | |
| 41 nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet() | |
| 42 { | |
| 43 } | |
| 44 | |
| 45 nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet() | |
| 46 { | |
| 47 // We may go away before all of our cached style attributes do, | |
| 48 // so clean up any that are left. | |
| 49 mCachedStyleAttrs.Enumerate(ClearAttrCache, nullptr); | |
| 50 } | |
| 51 | |
| 52 NS_IMPL_ISUPPORTS(nsHTMLCSSStyleSheet, nsIStyleRuleProcessor) | |
| 53 | |
| 54 /* virtual */ void | |
| 55 nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData) | |
| 56 { | |
| 57 Element* element = aData->mElement; | |
| 58 | |
| 59 // just get the one and only style rule from the content's STYLE attribute | |
| 60 css::StyleRule* rule = element->GetInlineStyleRule(); | |
| 61 if (rule) { | |
| 62 rule->RuleMatched(); | |
| 63 aData->mRuleWalker->Forward(rule); | |
| 64 } | |
| 65 | |
| 66 rule = element->GetSMILOverrideStyleRule(); | |
| 67 if (rule) { | |
| 68 if (aData->mPresContext->IsProcessingRestyles() && | |
| 69 !aData->mPresContext->IsProcessingAnimationStyleChange()) { | |
| 70 // Non-animation restyle -- don't process SMIL override style, because we | |
| 71 // don't want SMIL animation to trigger new CSS transitions. Instead, | |
| 72 // request an Animation restyle, so we still get noticed. | |
| 73 aData->mPresContext->PresShell()->RestyleForAnimation(element, | |
| 74 eRestyle_Self); | |
| 75 } else { | |
| 76 // Animation restyle (or non-restyle traversal of rules) | |
| 77 // Now we can walk SMIL overrride style, without triggering transitions. | |
| 78 rule->RuleMatched(); | |
| 79 aData->mRuleWalker->Forward(rule); | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 /* virtual */ void | |
| 85 nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData) | |
| 86 { | |
| 87 if (nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aData->mPseudoType)) { | |
| 88 MOZ_ASSERT(aData->mPseudoElement, | |
| 89 "If pseudo element is supposed to support style attribute, it must " | |
| 90 "have a pseudo element set"); | |
| 91 | |
| 92 // just get the one and only style rule from the content's STYLE attribute | |
| 93 css::StyleRule* rule = aData->mPseudoElement->GetInlineStyleRule(); | |
| 94 if (rule) { | |
| 95 rule->RuleMatched(); | |
| 96 aData->mRuleWalker->Forward(rule); | |
| 97 } | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 /* virtual */ void | |
| 102 nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData) | |
| 103 { | |
| 104 } | |
| 105 | |
| 106 #ifdef MOZ_XUL | |
| 107 /* virtual */ void | |
| 108 nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData) | |
| 109 { | |
| 110 } | |
| 111 #endif | |
| 112 | |
| 113 // Test if style is dependent on content state | |
| 114 /* virtual */ nsRestyleHint | |
| 115 nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData) | |
| 116 { | |
| 117 return nsRestyleHint(0); | |
| 118 } | |
| 119 | |
| 120 /* virtual */ nsRestyleHint | |
| 121 nsHTMLCSSStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData) | |
| 122 { | |
| 123 return nsRestyleHint(0); | |
| 124 } | |
| 125 | |
| 126 /* virtual */ bool | |
| 127 nsHTMLCSSStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData) | |
| 128 { | |
| 129 return false; | |
| 130 } | |
| 131 | |
| 132 // Test if style is dependent on attribute | |
| 133 /* virtual */ nsRestyleHint | |
| 134 nsHTMLCSSStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData) | |
| 135 { | |
| 136 // Perhaps should check that it's XUL, SVG, (or HTML) namespace, but | |
| 137 // it doesn't really matter. | |
| 138 if (aData->mAttrHasChanged && aData->mAttribute == nsGkAtoms::style) { | |
| 139 return eRestyle_Self; | |
| 140 } | |
| 141 | |
| 142 return nsRestyleHint(0); | |
| 143 } | |
| 144 | |
| 145 /* virtual */ bool | |
| 146 nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext) | |
| 147 { | |
| 148 return false; | |
| 149 } | |
| 150 | |
| 151 /* virtual */ size_t | |
| 152 nsHTMLCSSStyleSheet::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const | |
| 153 { | |
| 154 return 0; | |
| 155 } | |
| 156 | |
| 157 /* virtual */ size_t | |
| 158 nsHTMLCSSStyleSheet::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const | |
| 159 { | |
| 160 return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf); | |
| 161 } | |
| 162 | |
| 163 void | |
| 164 nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized, | |
| 165 MiscContainer* aValue) | |
| 166 { | |
| 167 mCachedStyleAttrs.Put(aSerialized, aValue); | |
| 168 } | |
| 169 | |
| 170 void | |
| 171 nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized, | |
| 172 MiscContainer* aValue) | |
| 173 { | |
| 174 #ifdef DEBUG | |
| 175 { | |
| 176 NS_ASSERTION(aValue = mCachedStyleAttrs.Get(aSerialized), | |
| 177 "Cached value does not match?!"); | |
| 178 } | |
| 179 #endif | |
| 180 mCachedStyleAttrs.Remove(aSerialized); | |
| 181 } | |
| 182 | |
| 183 MiscContainer* | |
| 184 nsHTMLCSSStyleSheet::LookupStyleAttr(const nsAString& aSerialized) | |
| 185 { | |
| 186 return mCachedStyleAttrs.Get(aSerialized); | |
| 187 } |
