gecko/layout/style/nsHTMLCSSStyleSheet.cpp

273 lines
6.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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/css/StyleRule.h"
#include "nsIStyleRuleProcessor.h"
#include "nsPresContext.h"
#include "nsIDocument.h"
#include "nsCOMPtr.h"
#include "nsRuleWalker.h"
#include "nsRuleProcessorData.h"
#include "mozilla/dom/Element.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
using namespace mozilla::dom;
namespace css = mozilla::css;
namespace {
PLDHashOperator
ClearAttrCache(const nsAString& aKey, MiscContainer*& aValue, void*)
{
// Ideally we'd just call MiscContainer::Evict, but we can't do that since
// we're iterating the hashtable.
MOZ_ASSERT(aValue->mType == nsAttrValue::eCSSStyleRule);
aValue->mValue.mCSSStyleRule->SetHTMLCSSStyleSheet(nullptr);
aValue->mValue.mCached = 0;
return PL_DHASH_REMOVE;
}
} // anonymous namespace
nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet(nsIURI* aURL, nsIDocument* aDocument)
: mURL(aURL)
, mDocument(aDocument) // not refcounted!
{
MOZ_ASSERT(aURL);
MOZ_ASSERT(aDocument);
mCachedStyleAttrs.Init();
}
nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet()
{
// We may go away before all of our cached style attributes do,
// so clean up any that are left.
mCachedStyleAttrs.Enumerate(ClearAttrCache, nullptr);
}
NS_IMPL_ISUPPORTS2(nsHTMLCSSStyleSheet,
nsIStyleSheet,
nsIStyleRuleProcessor)
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
{
Element* element = aData->mElement;
// just get the one and only style rule from the content's STYLE attribute
css::StyleRule* rule = element->GetInlineStyleRule();
if (rule) {
rule->RuleMatched();
aData->mRuleWalker->Forward(rule);
}
rule = element->GetSMILOverrideStyleRule();
if (rule) {
if (aData->mPresContext->IsProcessingRestyles() &&
!aData->mPresContext->IsProcessingAnimationStyleChange()) {
// Non-animation restyle -- don't process SMIL override style, because we
// don't want SMIL animation to trigger new CSS transitions. Instead,
// request an Animation restyle, so we still get noticed.
aData->mPresContext->PresShell()->RestyleForAnimation(element,
eRestyle_Self);
} else {
// Animation restyle (or non-restyle traversal of rules)
// Now we can walk SMIL overrride style, without triggering transitions.
rule->RuleMatched();
aData->mRuleWalker->Forward(rule);
}
}
}
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
{
}
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
{
}
#ifdef MOZ_XUL
/* virtual */ void
nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
{
}
#endif
// Test if style is dependent on content state
/* virtual */ nsRestyleHint
nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* 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)
{
// 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_Self;
}
return nsRestyleHint(0);
}
/* virtual */ bool
nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
{
return false;
}
/* virtual */ size_t
nsHTMLCSSStyleSheet::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return 0;
}
/* virtual */ size_t
nsHTMLCSSStyleSheet::SizeOfIncludingThis(nsMallocSizeOfFun 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);
}
void
nsHTMLCSSStyleSheet::Reset(nsIURI* aURL)
{
mURL = aURL;
}
/* virtual */ nsIURI*
nsHTMLCSSStyleSheet::GetSheetURI() const
{
return mURL;
}
/* virtual */ nsIURI*
nsHTMLCSSStyleSheet::GetBaseURI() const
{
return mURL;
}
/* virtual */ void
nsHTMLCSSStyleSheet::GetTitle(nsString& aTitle) const
{
aTitle.AssignLiteral("Internal HTML/CSS Style Sheet");
}
/* virtual */ void
nsHTMLCSSStyleSheet::GetType(nsString& aType) const
{
aType.AssignLiteral("text/html");
}
/* virtual */ bool
nsHTMLCSSStyleSheet::HasRules() const
{
// Say we always have rules, since we don't know.
return true;
}
/* virtual */ bool
nsHTMLCSSStyleSheet::IsApplicable() const
{
return true;
}
/* virtual */ void
nsHTMLCSSStyleSheet::SetEnabled(bool aEnabled)
{ // these can't be disabled
}
/* virtual */ bool
nsHTMLCSSStyleSheet::IsComplete() const
{
return true;
}
/* virtual */ void
nsHTMLCSSStyleSheet::SetComplete()
{
}
// style sheet owner info
/* virtual */ nsIStyleSheet*
nsHTMLCSSStyleSheet::GetParentSheet() const
{
return nullptr;
}
/* virtual */ nsIDocument*
nsHTMLCSSStyleSheet::GetOwningDocument() const
{
return mDocument;
}
/* virtual */ void
nsHTMLCSSStyleSheet::SetOwningDocument(nsIDocument* aDocument)
{
mDocument = aDocument;
}
#ifdef DEBUG
/* virtual */ void
nsHTMLCSSStyleSheet::List(FILE* out, int32_t aIndent) const
{
// Indent
for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("HTML CSS Style Sheet: ", out);
nsAutoCString urlSpec;
mURL->GetSpec(urlSpec);
if (!urlSpec.IsEmpty()) {
fputs(urlSpec.get(), out);
}
fputs("\n", out);
}
#endif