pjs/layout/style/nsCSSRuleProcessor.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:tabstop=2:expandtab:shiftwidth=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):
* L. David Baron <dbaron@dbaron.org>
*
* 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
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* 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 ***** */
/*
* style rule processor for CSS style sheets, responsible for selector
* matching and cascading
*/
#ifndef nsCSSRuleProcessor_h_
#define nsCSSRuleProcessor_h_
#include "nsIStyleRuleProcessor.h"
#include "nsCSSStyleSheet.h"
struct RuleCascadeData;
/**
* The CSS style rule processor provides a mechanism for sibling style
* sheets to combine their rule processing in order to allow proper
* cascading to happen.
*
* CSS style rule processors keep a live reference on all style sheets
* bound to them. The CSS style sheets keep a weak reference to all the
* processors that they are bound to (many to many). The CSS style sheet
* is told when the rule processor is going away (via DropRuleProcessor).
*/
class nsCSSRuleProcessor: public nsIStyleRuleProcessor {
public:
nsCSSRuleProcessor(const nsCOMArray<nsICSSStyleSheet>& aSheets);
virtual ~nsCSSRuleProcessor();
NS_DECL_ISUPPORTS
public:
nsresult ClearRuleCascades();
static void Shutdown();
// nsIStyleRuleProcessor
NS_IMETHOD RulesMatching(ElementRuleProcessorData* aData);
NS_IMETHOD RulesMatching(PseudoRuleProcessorData* aData);
NS_IMETHOD HasStateDependentStyle(StateRuleProcessorData* aData,
nsReStyleHint* aResult);
NS_IMETHOD HasAttributeDependentStyle(AttributeRuleProcessorData* aData,
nsReStyleHint* aResult);
protected:
RuleCascadeData* GetRuleCascade(nsPresContext* aPresContext);
// The sheet order here is the same as in nsStyleSet::mSheets
nsCOMArray<nsICSSStyleSheet> mSheets;
RuleCascadeData* mRuleCascades;
};
#endif /* nsCSSRuleProcessor_h_ */