gecko-dev/layout/style/ServoStyleRule.cpp

294 строки
8.1 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
/* representation of CSSStyleRule for stylo */
#include "mozilla/ServoStyleRule.h"
#include "mozilla/DeclarationBlockInlines.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/ServoDeclarationBlock.h"
#include "mozilla/dom/CSSStyleRuleBinding.h"
#include "mozAutoDocUpdate.h"
namespace mozilla {
// -- ServoStyleRuleDeclaration ---------------------------------------
ServoStyleRuleDeclaration::ServoStyleRuleDeclaration(
already_AddRefed<RawServoDeclarationBlock> aDecls)
: mDecls(new ServoDeclarationBlock(Move(aDecls)))
{
}
ServoStyleRuleDeclaration::~ServoStyleRuleDeclaration()
{
}
// QueryInterface implementation for ServoStyleRuleDeclaration
NS_INTERFACE_MAP_BEGIN(ServoStyleRuleDeclaration)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
// We forward the cycle collection interfaces to Rule(), which is
// never null (in fact, we're part of that object!)
if (aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ||
aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant))) {
return Rule()->QueryInterface(aIID, aInstancePtr);
}
else
NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration)
NS_IMPL_ADDREF_USING_AGGREGATOR(ServoStyleRuleDeclaration, Rule())
NS_IMPL_RELEASE_USING_AGGREGATOR(ServoStyleRuleDeclaration, Rule())
/* nsDOMCSSDeclaration implementation */
NS_IMETHODIMP
ServoStyleRuleDeclaration::GetParentRule(nsIDOMCSSRule** aParent)
{
*aParent = do_AddRef(Rule()).take();
return NS_OK;
}
nsINode*
ServoStyleRuleDeclaration::GetParentObject()
{
return Rule()->GetDocument();
}
DeclarationBlock*
ServoStyleRuleDeclaration::GetCSSDeclaration(Operation aOperation)
{
return mDecls;
}
nsresult
ServoStyleRuleDeclaration::SetCSSDeclaration(DeclarationBlock* aDecl)
{
ServoStyleRule* rule = Rule();
if (RefPtr<ServoStyleSheet> sheet = rule->GetStyleSheet()->AsServo()) {
nsCOMPtr<nsIDocument> doc = sheet->GetAssociatedDocument();
mozAutoDocUpdate updateBatch(doc, UPDATE_STYLE, true);
if (aDecl != mDecls) {
mDecls->SetOwningRule(nullptr);
RefPtr<ServoDeclarationBlock> decls = aDecl->AsServo();
Servo_StyleRule_SetStyle(rule->Raw(), decls->Raw());
mDecls = decls.forget();
mDecls->SetOwningRule(rule);
}
if (doc) {
doc->StyleRuleChanged(sheet, rule);
}
}
return NS_OK;
}
nsIDocument*
ServoStyleRuleDeclaration::DocToUpdate()
{
return nullptr;
}
void
ServoStyleRuleDeclaration::GetCSSParsingEnvironment(
CSSParsingEnvironment& aCSSParseEnv)
{
MOZ_ASSERT_UNREACHABLE("GetCSSParsingEnvironment "
"shouldn't be calling for a Servo rule");
GetCSSParsingEnvironmentForRule(Rule(), aCSSParseEnv);
}
nsDOMCSSDeclaration::ServoCSSParsingEnvironment
ServoStyleRuleDeclaration::GetServoCSSParsingEnvironment() const
{
return GetServoCSSParsingEnvironmentForRule(Rule());
}
// -- ServoStyleRule --------------------------------------------------
ServoStyleRule::ServoStyleRule(already_AddRefed<RawServoStyleRule> aRawRule,
uint32_t aLine, uint32_t aColumn)
: BindingStyleRule(aLine, aColumn)
, mRawRule(aRawRule)
, mDecls(Servo_StyleRule_GetStyle(mRawRule).Consume())
{
}
// QueryInterface implementation for ServoStyleRule
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(ServoStyleRule)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleRuleDOMWrapper)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleRule)
NS_INTERFACE_MAP_END_INHERITING(css::Rule)
NS_IMPL_ADDREF_INHERITED(ServoStyleRule, css::Rule)
NS_IMPL_RELEASE_INHERITED(ServoStyleRule, css::Rule)
NS_IMPL_CYCLE_COLLECTION_CLASS(ServoStyleRule)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(ServoStyleRule, css::Rule)
// Keep this in sync with IsCCLeaf.
// Trace the wrapper for our declaration. This just expands out
// NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER which we can't use
// directly because the wrapper is on the declaration, not on us.
tmp->mDecls.TraceWrapper(aCallbacks, aClosure);
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ServoStyleRule, css::Rule)
// Keep this in sync with IsCCLeaf.
// Unlink the wrapper for our declaraton. This just expands out
// NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER which we can't use
// directly because the wrapper is on the declaration, not on us.
tmp->mDecls.ReleaseWrapper(static_cast<nsISupports*>(p));
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ServoStyleRule, css::Rule)
// Keep this in sync with IsCCLeaf.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
bool
ServoStyleRule::IsCCLeaf() const
{
if (!Rule::IsCCLeaf()) {
return false;
}
return !mDecls.PreservingWrapper();
}
already_AddRefed<css::Rule>
ServoStyleRule::Clone() const
{
// Rule::Clone is only used when CSSStyleSheetInner is cloned in
// preparation of being mutated. However, ServoStyleSheet never clones
// anything, so this method should never be called.
MOZ_ASSERT_UNREACHABLE("Shouldn't be cloning ServoStyleRule");
return nullptr;
}
size_t
ServoStyleRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mRawRule
// - mDecls
return n;
}
#ifdef DEBUG
void
ServoStyleRule::List(FILE* out, int32_t aIndent) const
{
nsAutoCString str;
for (int32_t i = 0; i < aIndent; i++) {
str.AppendLiteral(" ");
}
Servo_StyleRule_Debug(mRawRule, &str);
fprintf_stderr(out, "%s\n", str.get());
}
#endif
/* nsICSSStyleRuleDOMWrapper implementation */
NS_IMETHODIMP
ServoStyleRule::GetCSSStyleRule(BindingStyleRule **aResult)
{
NS_ADDREF(*aResult = this);
return NS_OK;
}
/* CSSRule implementation */
uint16_t
ServoStyleRule::Type() const
{
return nsIDOMCSSRule::STYLE_RULE;
}
void
ServoStyleRule::GetCssTextImpl(nsAString& aCssText) const
{
Servo_StyleRule_GetCssText(mRawRule, &aCssText);
}
nsICSSDeclaration*
ServoStyleRule::Style()
{
return &mDecls;
}
/* CSSStyleRule implementation */
NS_IMETHODIMP
ServoStyleRule::GetSelectorText(nsAString& aSelectorText)
{
Servo_StyleRule_GetSelectorText(mRawRule, &aSelectorText);
return NS_OK;
}
NS_IMETHODIMP
ServoStyleRule::SetSelectorText(const nsAString& aSelectorText)
{
// XXX We need to implement this... But Gecko doesn't have this either
// so it's probably okay to leave it unimplemented currently?
// See bug 37468 and mozilla::css::StyleRule::SetSelectorText.
return NS_OK;
}
NS_IMETHODIMP
ServoStyleRule::GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
{
*aStyle = do_AddRef(&mDecls).take();
return NS_OK;
}
uint32_t
ServoStyleRule::GetSelectorCount()
{
uint32_t aCount;
Servo_StyleRule_GetSelectorCount(mRawRule, &aCount);
return aCount;
}
nsresult
ServoStyleRule::GetSelectorText(uint32_t aSelectorIndex, nsAString& aText)
{
Servo_StyleRule_GetSelectorTextAtIndex(mRawRule, aSelectorIndex, &aText);
return NS_OK;
}
nsresult
ServoStyleRule::GetSpecificity(uint32_t aSelectorIndex, uint64_t* aSpecificity)
{
Servo_StyleRule_GetSpecificityAtIndex(mRawRule, aSelectorIndex, aSpecificity);
return NS_OK;
}
nsresult
ServoStyleRule::SelectorMatchesElement(Element* aElement,
uint32_t aSelectorIndex,
const nsAString& aPseudo,
bool* aMatches)
{
nsCOMPtr<nsIAtom> pseudoElt = NS_Atomize(aPseudo);
const CSSPseudoElementType pseudoType =
nsCSSPseudoElements::GetPseudoType(pseudoElt,
CSSEnabledState::eIgnoreEnabledState);
*aMatches = Servo_StyleRule_SelectorMatchesElement(mRawRule,
aElement,
aSelectorIndex,
pseudoType);
return NS_OK;
}
} // namespace mozilla