fune/layout/style/CSSFontFaceRule.h
Emilio Cobos Álvarez 039592f4d8 Bug 1682003 - Avoid UTF-8 -> UTF-16 conversion during CSSOM serialization. r=heycam
This lifts a bunch of string conversions higher up the stack, but allows
us to make the servo code use utf-8 unconditionally, and seemed faster
in my benchmarking (see comment 0).

It should also make a bunch of attribute setters faster too (like
setting .cssText), now that we use UTF8String for them (we couldn't
because we couldn't specify different string types for the getter and
setters).

Differential Revision: https://phabricator.services.mozilla.com/D99590
2020-12-17 14:04:35 +00:00

103 lines
3.2 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/. */
#ifndef mozilla_CSSFontFaceRule_h
#define mozilla_CSSFontFaceRule_h
#include "mozilla/ServoBindingTypes.h"
#include "mozilla/css/Rule.h"
#include "nsICSSDeclaration.h"
namespace mozilla {
namespace dom {
// A CSSFontFaceRuleDecl is always embeded in a CSSFontFaceRule.
class CSSFontFaceRule;
class CSSFontFaceRuleDecl final : public nsICSSDeclaration {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIDOMCSSSTYLEDECLARATION_HELPER
nsINode* GetParentObject() final;
void IndexedGetter(uint32_t aIndex, bool& aFound,
nsACString& aPropName) final;
void GetPropertyValue(nsCSSFontDesc aFontDescID, nsACString& aResult) const;
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
protected:
// For accessing the constructor.
friend class CSSFontFaceRule;
explicit CSSFontFaceRuleDecl(already_AddRefed<RawServoFontFaceRule> aDecl)
: mRawRule(std::move(aDecl)) {}
~CSSFontFaceRuleDecl() = default;
inline CSSFontFaceRule* ContainingRule();
inline const CSSFontFaceRule* ContainingRule() const;
RefPtr<RawServoFontFaceRule> mRawRule;
private:
void* operator new(size_t size) noexcept(true) = delete;
};
class CSSFontFaceRule final : public css::Rule {
public:
CSSFontFaceRule(already_AddRefed<RawServoFontFaceRule> aRawRule,
StyleSheet* aSheet, css::Rule* aParentRule, uint32_t aLine,
uint32_t aColumn)
: css::Rule(aSheet, aParentRule, aLine, aColumn),
mDecl(std::move(aRawRule)) {}
CSSFontFaceRule(const CSSFontFaceRule&) = delete;
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(CSSFontFaceRule,
css::Rule)
bool IsCCLeaf() const final;
RawServoFontFaceRule* Raw() const { return mDecl.mRawRule; }
// WebIDL interface
uint16_t Type() const final;
void GetCssText(nsACString& aCssText) const final;
nsICSSDeclaration* Style();
// Methods of mozilla::css::Rule
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const final;
JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) final;
#ifdef DEBUG
void List(FILE* out = stdout, int32_t aIndent = 0) const final;
#endif
private:
virtual ~CSSFontFaceRule() = default;
// For computing the offset of mDecl.
friend class CSSFontFaceRuleDecl;
CSSFontFaceRuleDecl mDecl;
};
inline CSSFontFaceRule* CSSFontFaceRuleDecl::ContainingRule() {
return reinterpret_cast<CSSFontFaceRule*>(reinterpret_cast<char*>(this) -
offsetof(CSSFontFaceRule, mDecl));
}
inline const CSSFontFaceRule* CSSFontFaceRuleDecl::ContainingRule() const {
return reinterpret_cast<const CSSFontFaceRule*>(
reinterpret_cast<const char*>(this) - offsetof(CSSFontFaceRule, mDecl));
}
} // namespace dom
} // namespace mozilla
#endif // mozilla_CSSFontFaceRule_h