зеркало из https://github.com/mozilla/gecko-dev.git
238 строки
9.0 KiB
C++
238 строки
9.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* base class for DOM objects for element.style and cssStyleRule.style */
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#ifndef nsDOMCSSDeclaration_h___
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#define nsDOMCSSDeclaration_h___
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#include "nsICSSDeclaration.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/URLExtraData.h"
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#include "nsAttrValue.h"
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#include "nsIURI.h"
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#include "nsCOMPtr.h"
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#include "nsCompatibility.h"
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class nsIPrincipal;
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class nsIDocument;
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struct JSContext;
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class JSObject;
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namespace mozilla {
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class DeclarationBlock;
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struct DeclarationBlockMutationClosure;
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namespace css {
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class Loader;
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class Rule;
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} // namespace css
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namespace dom {
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class Element;
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}
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struct MutationClosureData
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{
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MutationClosureData()
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: mClosure(nullptr)
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, mElement(nullptr)
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, mModType(0)
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{
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}
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// mClosure is non-null as long as the closure hasn't been called.
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// This is needed so that it can be guaranteed that
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// InlineStyleDeclarationWillChange is always called before
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// SetInlineStyleDeclaration.
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void (*mClosure)(void*);
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mozilla::dom::Element* mElement;
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Maybe<nsAttrValue> mOldValue;
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uint8_t mModType;
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};
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} // namespace mozilla
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class nsDOMCSSDeclaration : public nsICSSDeclaration
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{
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public:
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// Only implement QueryInterface; subclasses have the responsibility
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// of implementing AddRef/Release.
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
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// Declare addref and release so they can be called on us, but don't
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// implement them. Our subclasses must handle their own
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// refcounting.
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NS_IMETHOD_(MozExternalRefCountType) AddRef() override = 0;
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NS_IMETHOD_(MozExternalRefCountType) Release() override = 0;
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/**
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* Method analogous to CSSStyleDeclaration::GetPropertyValue,
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* which obeys all the same restrictions.
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*/
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virtual nsresult GetPropertyValue(const nsCSSPropertyID aPropID,
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nsAString& aValue);
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/**
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* Method analogous to CSSStyleDeclaration::SetProperty. This
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* method does NOT allow setting a priority (the priority will
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* always be set to default priority).
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*/
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virtual nsresult SetPropertyValue(const nsCSSPropertyID aPropID,
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const nsAString& aValue,
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nsIPrincipal* aSubjectPrincipal);
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// Require subclasses to implement |GetParentRule|.
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//NS_DECL_NSIDOMCSSSTYLEDECLARATION
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void GetCssText(nsAString & aCssText) override;
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void SetCssText(const nsAString & aCssText,
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nsIPrincipal* aSubjectPrincipal,
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mozilla::ErrorResult& aRv) override;
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NS_IMETHOD GetPropertyValue(const nsAString & propertyName,
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nsAString & _retval) override;
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NS_IMETHOD RemoveProperty(const nsAString & propertyName,
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nsAString & _retval) override;
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void GetPropertyPriority(const nsAString & propertyName,
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nsAString & aPriority) override;
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NS_IMETHOD SetProperty(const nsAString& propertyName,
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const nsAString& value,
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const nsAString& priority,
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nsIPrincipal* aSubjectPrincipal) override;
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uint32_t Length() override;
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// WebIDL interface for CSS2Properties
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#define CSS_PROP_PUBLIC_OR_PRIVATE(publicname_, privatename_) publicname_
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#define CSS_PROP(id_, method_) \
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void \
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Get##method_(nsAString& aValue, mozilla::ErrorResult& rv) \
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{ \
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rv = GetPropertyValue(eCSSProperty_##id_, aValue); \
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} \
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\
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void \
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Set##method_(const nsAString& aValue, nsIPrincipal* aSubjectPrincipal, \
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mozilla::ErrorResult& rv) \
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{ \
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rv = SetPropertyValue(eCSSProperty_##id_, aValue, aSubjectPrincipal); \
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}
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#define CSS_PROP_LIST_EXCLUDE_INTERNAL
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#define CSS_PROP_LONGHAND(name_, id_, method_, ...) CSS_PROP(id_, method_)
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#define CSS_PROP_SHORTHAND(name_, id_, method_, ...) CSS_PROP(id_, method_)
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#define CSS_PROP_ALIAS(name_, aliasid_, id_, method_, ...) CSS_PROP(id_, method_)
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#include "mozilla/ServoCSSPropList.h"
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#undef CSS_PROP_ALIAS
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#undef CSS_PROP_SHORTHAND
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#undef CSS_PROP_LONGHAND
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#undef CSS_PROP_LIST_EXCLUDE_INTERNAL
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#undef CSS_PROP
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#undef CSS_PROP_PUBLIC_OR_PRIVATE
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virtual void IndexedGetter(uint32_t aIndex, bool& aFound, nsAString& aPropName) override;
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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// Information needed to parse a declaration for Servo side.
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// Put this in public so other Servo parsing functions can reuse this.
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struct MOZ_STACK_CLASS ParsingEnvironment
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{
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RefPtr<mozilla::URLExtraData> mUrlExtraData;
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nsCompatibility mCompatMode;
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mozilla::css::Loader* mLoader;
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ParsingEnvironment(mozilla::URLExtraData* aUrlData,
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nsCompatibility aCompatMode,
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mozilla::css::Loader* aLoader)
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: mUrlExtraData(aUrlData)
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, mCompatMode(aCompatMode)
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, mLoader(aLoader)
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{}
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ParsingEnvironment(already_AddRefed<mozilla::URLExtraData> aUrlData,
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nsCompatibility aCompatMode,
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mozilla::css::Loader* aLoader)
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: mUrlExtraData(aUrlData)
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, mCompatMode(aCompatMode)
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, mLoader(aLoader)
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{}
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};
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protected:
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// The reason for calling GetOrCreateCSSDeclaration.
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enum Operation {
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// We are calling GetOrCreateCSSDeclaration so that we can read from it.
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// Does not allocate a new declaration if we don't have one yet; returns
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// nullptr in this case.
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eOperation_Read,
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// We are calling GetOrCreateCSSDeclaration so that we can set a property on
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// it or re-parse the whole declaration. Allocates a new declaration if we
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// don't have one yet. A nullptr return value indicates an error allocating
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// the declaration.
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eOperation_Modify,
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// We are calling GetOrCreateCSSDeclaration so that we can remove a property
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// from it. Does not allocate a new declaration if we don't have one yet;
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// returns nullptr in this case.
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eOperation_RemoveProperty
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};
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// If aOperation is eOperation_Modify, aCreated must be non-null and
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// the call may set it to point to the newly created object.
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virtual mozilla::DeclarationBlock* GetOrCreateCSSDeclaration(
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Operation aOperation, mozilla::DeclarationBlock** aCreated) = 0;
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virtual nsresult SetCSSDeclaration(mozilla::DeclarationBlock* aDecl,
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mozilla::MutationClosureData* aClosureData) = 0;
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// Document that we must call BeginUpdate/EndUpdate on around the
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// calls to SetCSSDeclaration and the style rule mutation that leads
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// to it.
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virtual nsIDocument* DocToUpdate() = 0;
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// mUrlExtraData returns URL data for parsing url values in
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// CSS. Returns nullptr on failure. If mUrlExtraData is nullptr,
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// mCompatMode may not be set to anything meaningful.
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// If aSubjectPrincipal is passed, it should be the subject principal of the
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// scripted caller that initiated the parser.
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virtual ParsingEnvironment
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GetParsingEnvironment(nsIPrincipal* aSubjectPrincipal = nullptr) const = 0;
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// An implementation for GetParsingEnvironment for callers wrapping a
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// css::Rule.
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static ParsingEnvironment
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GetParsingEnvironmentForRule(const mozilla::css::Rule* aRule);
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nsresult ParsePropertyValue(const nsCSSPropertyID aPropID,
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const nsAString& aPropValue,
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bool aIsImportant,
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nsIPrincipal* aSubjectPrincipal);
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nsresult ParseCustomPropertyValue(const nsAString& aPropertyName,
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const nsAString& aPropValue,
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bool aIsImportant,
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nsIPrincipal* aSubjectPrincipal);
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nsresult RemovePropertyInternal(nsCSSPropertyID aPropID);
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nsresult RemovePropertyInternal(const nsAString& aProperty);
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virtual void
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GetPropertyChangeClosure(mozilla::DeclarationBlockMutationClosure* aClosure,
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mozilla::MutationClosureData* aClosureData)
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{
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}
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protected:
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virtual ~nsDOMCSSDeclaration();
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private:
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template<typename ServoFunc>
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inline nsresult ModifyDeclaration(nsIPrincipal* aSubjectPrincipal,
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mozilla::MutationClosureData* aClosureData,
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ServoFunc aServoFunc);
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};
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#endif // nsDOMCSSDeclaration_h___
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