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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* style sheet and style rule processor representing style attributes
*/
#include "nsHTMLCSSStyleSheet.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/css/StyleRule.h"
#include "mozilla/DeclarationBlockInlines.h"
#include "nsIStyleRuleProcessor.h"
#include "nsPresContext.h"
#include "nsRuleWalker.h"
#include "nsRuleProcessorData.h"
#include "mozilla/dom/Element.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
#include "nsCSSPseudoElements.h"
#include "mozilla/RestyleManagerHandle.h"
#include "mozilla/RestyleManagerHandleInlines.h"
using namespace mozilla;
using namespace mozilla::dom;
nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet()
{
}
nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet()
{
// We may go away before all of our cached style attributes do,
// so clean up any that are left.
for (auto iter = mCachedStyleAttrs.Iter(); !iter.Done(); iter.Next()) {
MiscContainer*& value = iter.Data();
// Ideally we'd just call MiscContainer::Evict, but we can't do that since
// we're iterating the hashtable.
if (value->mType == nsAttrValue::eCSSDeclaration) {
DeclarationBlock* declaration = value->mValue.mCSSDeclaration;
declaration->SetHTMLCSSStyleSheet(nullptr);
} else {
MOZ_ASSERT_UNREACHABLE("unexpected cached nsAttrValue type");
}
value->mValue.mCached = 0;
iter.Remove();
}
}
NS_IMPL_ISUPPORTS(nsHTMLCSSStyleSheet, nsIStyleRuleProcessor)
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
{
ElementRulesMatching(aData->mPresContext, aData->mElement,
aData->mRuleWalker);
}
void
nsHTMLCSSStyleSheet::ElementRulesMatching(nsPresContext* aPresContext,
Element* aElement,
nsRuleWalker* aRuleWalker)
{
// just get the one and only style rule from the content's STYLE attribute
DeclarationBlock* declaration = aElement->GetInlineStyleDeclaration();
if (declaration) {
declaration->SetImmutable();
aRuleWalker->Forward(declaration->AsGecko());
}
declaration = aElement->GetSMILOverrideStyleDeclaration();
if (declaration) {
MOZ_ASSERT(aPresContext->RestyleManager()->IsGecko(),
"stylo: ElementRulesMatching must not be called when we have "
"a Servo-backed style system");
RestyleManager* restyleManager = aPresContext->RestyleManager()->AsGecko();
if (!restyleManager->SkipAnimationRules()) {
// Animation restyle (or non-restyle traversal of rules)
// Now we can walk SMIL overrride style, without triggering transitions.
declaration->SetImmutable();
aRuleWalker->Forward(declaration->AsGecko());
}
}
}
void
nsHTMLCSSStyleSheet::PseudoElementRulesMatching(Element* aPseudoElement,
CSSPseudoElementType
aPseudoType,
nsRuleWalker* aRuleWalker)
{
MOZ_ASSERT(nsCSSPseudoElements::
PseudoElementSupportsStyleAttribute(aPseudoType));
MOZ_ASSERT(aPseudoElement);
// just get the one and only style rule from the content's STYLE attribute
DeclarationBlock* declaration = aPseudoElement->GetInlineStyleDeclaration();
if (declaration) {
declaration->SetImmutable();
aRuleWalker->Forward(declaration->AsGecko());
}
}
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
{
if (nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aData->mPseudoType) &&
aData->mPseudoElement) {
PseudoElementRulesMatching(aData->mPseudoElement, aData->mPseudoType,
aData->mRuleWalker);
}
}
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
{
}
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
{
}
// Test if style is dependent on content state
/* virtual */ nsRestyleHint
nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
/* virtual */ nsRestyleHint
nsHTMLCSSStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
{
return nsRestyleHint(0);
}
/* virtual */ bool
nsHTMLCSSStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
{
return false;
}
// Test if style is dependent on attribute
/* virtual */ nsRestyleHint
nsHTMLCSSStyleSheet::HasAttributeDependentStyle(
AttributeRuleProcessorData* aData,
RestyleHintData& aRestyleHintDataResult)
{
// Perhaps should check that it's XUL, SVG, (or HTML) namespace, but
// it doesn't really matter.
if (aData->mAttrHasChanged && aData->mAttribute == nsGkAtoms::style) {
return eRestyle_StyleAttribute;
}
return nsRestyleHint(0);
}
/* virtual */ bool
nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
{
return false;
}
/* virtual */ size_t
nsHTMLCSSStyleSheet::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
// The size of mCachedStyleAttrs's mTable member (a PLDHashTable) is
// significant in itself, but more significant is the size of the nsString
// members of the nsStringHashKeys.
size_t n = 0;
n += mCachedStyleAttrs.ShallowSizeOfExcludingThis(aMallocSizeOf);
for (auto iter = mCachedStyleAttrs.ConstIter(); !iter.Done(); iter.Next()) {
// We don't own the MiscContainers (the hash table values) so we don't
// count them. We do care about the size of the nsString members in the
// keys though.
n += iter.Key().SizeOfExcludingThisIfUnshared(aMallocSizeOf);
}
return n;
}
/* virtual */ size_t
nsHTMLCSSStyleSheet::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
void
nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized,
MiscContainer* aValue)
{
mCachedStyleAttrs.Put(aSerialized, aValue);
}
void
nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized,
MiscContainer* aValue)
{
#ifdef DEBUG
{
NS_ASSERTION(aValue == mCachedStyleAttrs.Get(aSerialized),
"Cached value does not match?!");
}
#endif
mCachedStyleAttrs.Remove(aSerialized);
}
MiscContainer*
nsHTMLCSSStyleSheet::LookupStyleAttr(const nsAString& aSerialized)
{
return mCachedStyleAttrs.Get(aSerialized);
}
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