gecko-dev/layout/style/nsICSSParser.h

189 lines
7.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* parsing of CSS stylesheets, based on a token stream from the CSS scanner */
#ifndef nsICSSParser_h___
#define nsICSSParser_h___
#include "nsISupports.h"
#include "nsAString.h"
#include "nsCSSProperty.h"
#include "nsColor.h"
#include "nsCOMArray.h"
class nsICSSStyleRule;
class nsICSSStyleSheet;
class nsIUnicharInputStream;
class nsIURI;
class nsCSSDeclaration;
class nsICSSLoader;
class nsICSSRule;
class nsMediaList;
class nsIPrincipal;
struct nsCSSSelectorList;
#define NS_ICSS_PARSER_IID \
{ 0xad4a3778, 0xdae0, 0x4640, \
{ 0xb2, 0x5a, 0x24, 0xff, 0x09, 0xc3, 0x70, 0xef } }
// Rule processing function
typedef void (* RuleAppendFunc) (nsICSSRule* aRule, void* aData);
// Interface to the css parser.
class nsICSSParser : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSS_PARSER_IID)
// Set a style sheet for the parser to fill in. The style sheet must
// implement the nsICSSStyleSheet interface. Null can be passed in to clear
// out an existing stylesheet reference.
NS_IMETHOD SetStyleSheet(nsICSSStyleSheet* aSheet) = 0;
// Set whether or not tags & classes are case sensitive or uppercased
NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive) = 0;
// Set whether or not to emulate Nav quirks
NS_IMETHOD SetQuirkMode(PRBool aQuirkMode) = 0;
#ifdef MOZ_SVG
// Set whether or not we are in an SVG element
NS_IMETHOD SetSVGMode(PRBool aSVGMode) = 0;
#endif
// Set loader to use for child sheets
NS_IMETHOD SetChildLoader(nsICSSLoader* aChildLoader) = 0;
/**
* Parse aInput into the stylesheet that was previously set by calling
* SetStyleSheet. Calling this method without calling SetStyleSheet first is
* an error.
*
* @param aInput the data to parse
* @param aSheetURL the URI to use as the sheet URI (for error reporting).
* This must match the URI of the sheet passed to
* SetStyleSheet.
* @param aBaseURI the URI to use for relative URI resolution
* @param aSheetPrincipal the principal of the stylesheet. This must match
* the principal of the sheet passed to SetStyleSheet.
* @param aLineNumber the line number of the first line of the sheet.
* @param aAllowUnsafeRules see aEnableUnsafeRules in
* nsICSSLoader::LoadSheetSync
*/
NS_IMETHOD Parse(nsIUnicharInputStream* aInput,
nsIURI* aSheetURL,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
PRUint32 aLineNumber,
PRBool aAllowUnsafeRules) = 0;
// Parse HTML style attribute or its equivalent in other markup
// languages. aBaseURL is the base url to use for relative links in
// the declaration.
NS_IMETHOD ParseStyleAttribute(const nsAString& aAttributeValue,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aNodePrincipal,
nsICSSStyleRule** aResult) = 0;
NS_IMETHOD ParseAndAppendDeclaration(const nsAString& aBuffer,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
nsCSSDeclaration* aDeclaration,
PRBool aParseOnlyOneDecl,
PRBool* aChanged,
PRBool aClearOldDecl) = 0;
NS_IMETHOD ParseRule(const nsAString& aRule,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
nsCOMArray<nsICSSRule>& aResult) = 0;
NS_IMETHOD ParseProperty(const nsCSSProperty aPropID,
const nsAString& aPropValue,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
nsCSSDeclaration* aDeclaration,
PRBool* aChanged) = 0;
/**
* Parse aBuffer into a media list |aMediaList|, which must be
* non-null, replacing its current contents. If aHTMLMode is true,
* parse according to HTML rules, with commas as the most important
* delimiter. Otherwise, parse according to CSS rules, with
* parentheses and strings more important than commas.
*/
NS_IMETHOD ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nsMediaList* aMediaList,
PRBool aHTMLMode) = 0;
/**
* Parse aBuffer into a nscolor |aColor|. The alpha component of the
* resulting aColor may vary due to rgba()/hsla(). Will return
* NS_ERROR_FAILURE if aBuffer is not a valid CSS color specification.
*
* Will also currently return NS_ERROR_FAILURE if it is not
* self-contained (i.e. doesn't reference any external style state,
* such as "initial" or "inherit").
*/
NS_IMETHOD ParseColorString(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nscolor* aColor) = 0;
/**
* Parse aBuffer into a selector list. On success, caller must
* delete *aSelectorList when done with it.
*/
NS_IMETHOD ParseSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nsCSSSelectorList **aSelectorList) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSParser, NS_ICSS_PARSER_IID)
nsresult
NS_NewCSSParser(nsICSSParser** aInstancePtrResult);
#endif /* nsICSSParser_h___ */