зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
4.1 KiB
C++
108 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsIDOMCSS2Properties.h"
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#include "nsCOMPtr.h"
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class nsCSSParser;
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class nsIURI;
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class nsIPrincipal;
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class nsIDocument;
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namespace mozilla {
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namespace css {
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class Declaration;
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class Loader;
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class Rule;
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}
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}
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class nsDOMCSSDeclaration : public nsICSSDeclaration,
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public nsIDOMCSS2Properties
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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);
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NS_DECL_NSICSSDECLARATION
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// Require subclasses to implement |GetParentRule|.
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//NS_DECL_NSIDOMCSSSTYLEDECLARATION
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NS_IMETHOD GetCssText(nsAString & aCssText);
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NS_IMETHOD SetCssText(const nsAString & aCssText);
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NS_IMETHOD GetPropertyValue(const nsAString & propertyName,
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nsAString & _retval);
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NS_IMETHOD GetPropertyCSSValue(const nsAString & propertyName,
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nsIDOMCSSValue **_retval);
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NS_IMETHOD RemoveProperty(const nsAString & propertyName,
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nsAString & _retval);
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NS_IMETHOD GetPropertyPriority(const nsAString & propertyName,
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nsAString & _retval);
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NS_IMETHOD SetProperty(const nsAString & propertyName,
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const nsAString & value, const nsAString & priority);
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NS_IMETHOD GetLength(PRUint32 *aLength);
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NS_IMETHOD Item(PRUint32 index, nsAString & _retval);
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NS_IMETHOD GetParentRule(nsIDOMCSSRule * *aParentRule) = 0;
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// We implement this as a shim which forwards to GetPropertyValue
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// and SetPropertyValue; subclasses need not.
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NS_DECL_NSIDOMCSS2PROPERTIES
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protected:
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// This method can return null regardless of the value of aAllocate;
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// however, a null return should only be considered a failure
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// if aAllocate is true.
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virtual mozilla::css::Declaration* GetCSSDeclaration(bool aAllocate) = 0;
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virtual nsresult SetCSSDeclaration(mozilla::css::Declaration* aDecl) = 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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// Information neded to parse a declaration. We need the mSheetURI
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// for error reporting, mBaseURI to resolve relative URIs,
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// mPrincipal for subresource loads, and mCSSLoader for determining
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// whether we're in quirks mode. mBaseURI needs to be a strong
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// pointer because of xml:base possibly creating base URIs on the
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// fly. This is why we don't use CSSParsingEnvironment as a return
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// value, to avoid multiple-refcounting of mBaseURI.
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struct CSSParsingEnvironment {
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nsIURI* mSheetURI;
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nsCOMPtr<nsIURI> mBaseURI;
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nsIPrincipal* mPrincipal;
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mozilla::css::Loader* mCSSLoader;
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};
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// On failure, mPrincipal should be set to null in aCSSParseEnv.
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// If mPrincipal is null, the other members may not be set to
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// anything meaningful.
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virtual void GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv) = 0;
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// An implementation for GetCSSParsingEnvironment for callers wrapping
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// an css::Rule.
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static void GetCSSParsingEnvironmentForRule(mozilla::css::Rule* aRule,
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CSSParsingEnvironment& aCSSParseEnv);
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nsresult ParsePropertyValue(const nsCSSProperty aPropID,
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const nsAString& aPropValue,
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bool aIsImportant);
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// Prop-id based version of RemoveProperty. Note that this does not
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// return the old value; it just does a straight removal.
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nsresult RemoveProperty(const nsCSSProperty aPropID);
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protected:
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virtual ~nsDOMCSSDeclaration();
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};
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#endif // nsDOMCSSDeclaration_h___
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