зеркало из https://github.com/mozilla/gecko-dev.git
205 строки
8.0 KiB
C++
205 строки
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* parsing of CSS stylesheets, based on a token stream from the CSS scanner */
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#ifndef nsCSSParser_h___
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#define nsCSSParser_h___
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#include "nsAString.h"
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#include "nsCSSProperty.h"
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#include "nsColor.h"
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#include "nsCOMArray.h"
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class nsICSSRule;
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class nsICSSStyleRule;
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class nsCSSStyleSheet;
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class nsIPrincipal;
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class nsIURI;
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class nsIUnicharInputStream;
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struct nsCSSSelectorList;
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class nsMediaList;
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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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}
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}
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// Interface to the css parser.
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class NS_STACK_CLASS nsCSSParser {
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public:
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nsCSSParser(mozilla::css::Loader* aLoader = nsnull,
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nsCSSStyleSheet* aSheet = nsnull);
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~nsCSSParser();
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static void Shutdown();
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private:
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// not to be implemented
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nsCSSParser(nsCSSParser const&);
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nsCSSParser& operator=(nsCSSParser const&);
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public:
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// If this is false, memory allocation failed in the constructor
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// and all other methods will crash.
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operator bool() const
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{ return !!mImpl; }
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// Set a style sheet for the parser to fill in. The style sheet must
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// implement the nsCSSStyleSheet interface. Null can be passed in to clear
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// out an existing stylesheet reference.
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nsresult SetStyleSheet(nsCSSStyleSheet* aSheet);
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// Set whether or not to emulate Nav quirks
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nsresult SetQuirkMode(PRBool aQuirkMode);
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#ifdef MOZ_SVG
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// Set whether or not we are in an SVG element
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nsresult SetSVGMode(PRBool aSVGMode);
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#endif
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// Set loader to use for child sheets
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nsresult SetChildLoader(mozilla::css::Loader* aChildLoader);
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/**
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* Parse aInput into the stylesheet that was previously set by calling
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* SetStyleSheet. Calling this method without calling SetStyleSheet first is
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* an error.
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*
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* @param aInput the data to parse
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* @param aSheetURL the URI to use as the sheet URI (for error reporting).
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* This must match the URI of the sheet passed to
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* SetStyleSheet.
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* @param aBaseURI the URI to use for relative URI resolution
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* @param aSheetPrincipal the principal of the stylesheet. This must match
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* the principal of the sheet passed to SetStyleSheet.
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* @param aLineNumber the line number of the first line of the sheet.
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* @param aAllowUnsafeRules see aEnableUnsafeRules in
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* mozilla::css::Loader::LoadSheetSync
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*/
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nsresult Parse(nsIUnicharInputStream* aInput,
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nsIURI* aSheetURL,
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nsIURI* aBaseURI,
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nsIPrincipal* aSheetPrincipal,
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PRUint32 aLineNumber,
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PRBool aAllowUnsafeRules);
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// Parse HTML style attribute or its equivalent in other markup
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// languages. aBaseURL is the base url to use for relative links in
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// the declaration.
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nsresult ParseStyleAttribute(const nsAString& aAttributeValue,
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nsIURI* aDocURL,
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nsIURI* aBaseURL,
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nsIPrincipal* aNodePrincipal,
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nsICSSStyleRule** aResult);
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// Parse the body of a declaration block. Very similar to
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// ParseStyleAttribute, but used under different circumstances.
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// The contents of aDeclaration will be erased and replaced with the
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// results of parsing; aChanged will be set true if the aDeclaration
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// argument was modified.
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nsresult ParseDeclarations(const nsAString& aBuffer,
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nsIURI* aSheetURL,
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nsIURI* aBaseURL,
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nsIPrincipal* aSheetPrincipal,
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mozilla::css::Declaration* aDeclaration,
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PRBool* aChanged);
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nsresult ParseRule(const nsAString& aRule,
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nsIURI* aSheetURL,
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nsIURI* aBaseURL,
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nsIPrincipal* aSheetPrincipal,
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nsCOMArray<nsICSSRule>& aResult);
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nsresult ParseProperty(const nsCSSProperty aPropID,
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const nsAString& aPropValue,
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nsIURI* aSheetURL,
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nsIURI* aBaseURL,
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nsIPrincipal* aSheetPrincipal,
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mozilla::css::Declaration* aDeclaration,
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PRBool* aChanged,
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PRBool aIsImportant);
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/**
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* Parse aBuffer into a media list |aMediaList|, which must be
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* non-null, replacing its current contents. If aHTMLMode is true,
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* parse according to HTML rules, with commas as the most important
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* delimiter. Otherwise, parse according to CSS rules, with
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* parentheses and strings more important than commas. |aURL| and
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* |aLineNumber| are used for error reporting.
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*/
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nsresult ParseMediaList(const nsSubstring& aBuffer,
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nsIURI* aURL,
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PRUint32 aLineNumber,
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nsMediaList* aMediaList,
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PRBool aHTMLMode);
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/**
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* Parse aBuffer into a nscolor |aColor|. The alpha component of the
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* resulting aColor may vary due to rgba()/hsla(). Will return
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* NS_ERROR_FAILURE if aBuffer is not a valid CSS color specification.
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*
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* Will also currently return NS_ERROR_FAILURE if it is not
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* self-contained (i.e. doesn't reference any external style state,
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* such as "initial" or "inherit").
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*/
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nsresult ParseColorString(const nsSubstring& aBuffer,
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nsIURI* aURL,
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PRUint32 aLineNumber,
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nscolor* aColor);
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/**
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* Parse aBuffer into a selector list. On success, caller must
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* delete *aSelectorList when done with it.
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*/
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nsresult ParseSelectorString(const nsSubstring& aSelectorString,
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nsIURI* aURL,
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PRUint32 aLineNumber,
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nsCSSSelectorList** aSelectorList);
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protected:
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// This is a CSSParserImpl*, but if we expose that type name in this
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// header, we can't put the type definition (in nsCSSParser.cpp) in
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// the anonymous namespace.
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void* mImpl;
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};
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#endif /* nsCSSParser_h___ */
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