gecko-dev/layout/style/nsIStyleSheet.h

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/* -*- 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
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*
* ***** END LICENSE BLOCK ***** */
#ifndef nsIStyleSheet_h___
#define nsIStyleSheet_h___
#include <stdio.h>
#include "nsISupports.h"
class nsIAtom;
class nsString;
class nsIURI;
class nsIStyleRule;
class nsISupportsArray;
class nsPresContext;
class nsIContent;
class nsIDocument;
class nsIStyleRuleProcessor;
// IID for the nsIStyleSheet interface
// 6fbfb2cb-a1c0-4576-9354-a4af4e0029ad
#define NS_ISTYLE_SHEET_IID \
{0x6fbfb2cb, 0xa1c0, 0x4576, {0x93, 0x54, 0xa4, 0xaf, 0x4e, 0x00, 0x29, 0xad}}
/**
* A style sheet is a thing associated with a document that has style
* rules. Those style rules can be reached in one of two ways, depending
* on which level of the nsStyleSet it is in:
* 1) It can be |QueryInterface|d to nsIStyleRuleProcessor
* 2) It can be |QueryInterface|d to nsICSSStyleSheet, with which the
* |nsStyleSet| uses an |nsCSSRuleProcessor| to access the rules.
*/
class nsIStyleSheet : public nsISupports {
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISTYLE_SHEET_IID)
// basic style sheet data
NS_IMETHOD GetSheetURI(nsIURI** aSheetURI) const = 0;
NS_IMETHOD GetBaseURI(nsIURI** aBaseURI) const = 0;
NS_IMETHOD GetTitle(nsString& aTitle) const = 0;
NS_IMETHOD GetType(nsString& aType) const = 0;
NS_IMETHOD GetMediumCount(PRInt32& aCount) const = 0;
NS_IMETHOD GetMediumAt(PRInt32 aIndex, nsIAtom*& aMedium) const = 0;
NS_IMETHOD_(PRBool) UseForMedium(nsIAtom* aMedium) const = 0;
NS_IMETHOD_(PRBool) HasRules() const = 0;
/**
* Whether the sheet is applicable. A sheet that is not applicable
* should never be inserted into a style set. A sheet may not be
* applicable for a variety of reasons including being disabled and
* being incomplete.
*
*/
NS_IMETHOD GetApplicable(PRBool& aApplicable) const = 0;
/**
* Set the stylesheet to be enabled. This may or may not make it
* applicable.
*/
NS_IMETHOD SetEnabled(PRBool aEnabled) = 0;
/**
* Whether the sheet is complete.
*/
NS_IMETHOD GetComplete(PRBool& aComplete) const = 0;
NS_IMETHOD SetComplete() = 0;
// style sheet owner info
NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const = 0; // may be null
NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const = 0; // may be null
NS_IMETHOD SetOwningDocument(nsIDocument* aDocument) = 0;
#ifdef DEBUG
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const = 0;
#endif
};
#endif /* nsIStyleSheet_h___ */