michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * style sheet and style rule processor representing style attributes
michael@0:  */
michael@0: 
michael@0: #include "nsHTMLCSSStyleSheet.h"
michael@0: #include "mozilla/MemoryReporting.h"
michael@0: #include "mozilla/css/StyleRule.h"
michael@0: #include "nsIStyleRuleProcessor.h"
michael@0: #include "nsPresContext.h"
michael@0: #include "nsRuleWalker.h"
michael@0: #include "nsRuleProcessorData.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "nsAttrValue.h"
michael@0: #include "nsAttrValueInlines.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: namespace {
michael@0: 
michael@0: PLDHashOperator
michael@0: ClearAttrCache(const nsAString& aKey, MiscContainer*& aValue, void*)
michael@0: {
michael@0:   // Ideally we'd just call MiscContainer::Evict, but we can't do that since
michael@0:   // we're iterating the hashtable.
michael@0:   MOZ_ASSERT(aValue->mType == nsAttrValue::eCSSStyleRule);
michael@0: 
michael@0:   aValue->mValue.mCSSStyleRule->SetHTMLCSSStyleSheet(nullptr);
michael@0:   aValue->mValue.mCached = 0;
michael@0: 
michael@0:   return PL_DHASH_REMOVE;
michael@0: }
michael@0: 
michael@0: } // anonymous namespace
michael@0: 
michael@0: nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet()
michael@0: {
michael@0: }
michael@0: 
michael@0: nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet()
michael@0: {
michael@0:   // We may go away before all of our cached style attributes do,
michael@0:   // so clean up any that are left.
michael@0:   mCachedStyleAttrs.Enumerate(ClearAttrCache, nullptr);
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsHTMLCSSStyleSheet, nsIStyleRuleProcessor)
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
michael@0: {
michael@0:   Element* element = aData->mElement;
michael@0: 
michael@0:   // just get the one and only style rule from the content's STYLE attribute
michael@0:   css::StyleRule* rule = element->GetInlineStyleRule();
michael@0:   if (rule) {
michael@0:     rule->RuleMatched();
michael@0:     aData->mRuleWalker->Forward(rule);
michael@0:   }
michael@0: 
michael@0:   rule = element->GetSMILOverrideStyleRule();
michael@0:   if (rule) {
michael@0:     if (aData->mPresContext->IsProcessingRestyles() &&
michael@0:         !aData->mPresContext->IsProcessingAnimationStyleChange()) {
michael@0:       // Non-animation restyle -- don't process SMIL override style, because we
michael@0:       // don't want SMIL animation to trigger new CSS transitions. Instead,
michael@0:       // request an Animation restyle, so we still get noticed.
michael@0:       aData->mPresContext->PresShell()->RestyleForAnimation(element,
michael@0:                                                             eRestyle_Self);
michael@0:     } else {
michael@0:       // Animation restyle (or non-restyle traversal of rules)
michael@0:       // Now we can walk SMIL overrride style, without triggering transitions.
michael@0:       rule->RuleMatched();
michael@0:       aData->mRuleWalker->Forward(rule);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
michael@0: {
michael@0:   if (nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aData->mPseudoType)) {
michael@0:     MOZ_ASSERT(aData->mPseudoElement,
michael@0:         "If pseudo element is supposed to support style attribute, it must "
michael@0:         "have a pseudo element set");
michael@0: 
michael@0:     // just get the one and only style rule from the content's STYLE attribute
michael@0:     css::StyleRule* rule = aData->mPseudoElement->GetInlineStyleRule();
michael@0:     if (rule) {
michael@0:       rule->RuleMatched();
michael@0:       aData->mRuleWalker->Forward(rule);
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: /* virtual */ void
michael@0: nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
michael@0: {
michael@0: }
michael@0: 
michael@0: #ifdef MOZ_XUL
michael@0: /* virtual */ void
michael@0: nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
michael@0: {
michael@0: }
michael@0: #endif
michael@0: 
michael@0: // Test if style is dependent on content state
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
michael@0: {
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLCSSStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
michael@0: {
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ bool
michael@0: nsHTMLCSSStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
michael@0: {
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: // Test if style is dependent on attribute
michael@0: /* virtual */ nsRestyleHint
michael@0: nsHTMLCSSStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
michael@0: {
michael@0:   // Perhaps should check that it's XUL, SVG, (or HTML) namespace, but
michael@0:   // it doesn't really matter.
michael@0:   if (aData->mAttrHasChanged && aData->mAttribute == nsGkAtoms::style) {
michael@0:     return eRestyle_Self;
michael@0:   }
michael@0: 
michael@0:   return nsRestyleHint(0);
michael@0: }
michael@0: 
michael@0: /* virtual */ bool
michael@0: nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
michael@0: {
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: /* virtual */ size_t
michael@0: nsHTMLCSSStyleSheet::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: /* virtual */ size_t
michael@0: nsHTMLCSSStyleSheet::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
michael@0: {
michael@0:   return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized,
michael@0:                                     MiscContainer* aValue)
michael@0: {
michael@0:   mCachedStyleAttrs.Put(aSerialized, aValue);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized,
michael@0:                                     MiscContainer* aValue)
michael@0: {
michael@0: #ifdef DEBUG
michael@0:   {
michael@0:     NS_ASSERTION(aValue = mCachedStyleAttrs.Get(aSerialized),
michael@0:                  "Cached value does not match?!");
michael@0:   }
michael@0: #endif
michael@0:   mCachedStyleAttrs.Remove(aSerialized);
michael@0: }
michael@0: 
michael@0: MiscContainer*
michael@0: nsHTMLCSSStyleSheet::LookupStyleAttr(const nsAString& aSerialized)
michael@0: {
michael@0:   return mCachedStyleAttrs.Get(aSerialized);
michael@0: }