gecko/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
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* interface representing a collection of style data attached to a
* document, which may be or be combined into a style rule processor
*/
#ifndef nsIStyleSheet_h___
#define nsIStyleSheet_h___
#include <stdio.h>
#include "nsISupports.h"
class nsString;
class nsIURI;
class nsIDocument;
// IID for the nsIStyleSheet interface
// 3eb34a60-04bd-41d9-9f60-882694e61c38
#define NS_ISTYLE_SHEET_IID \
{ 0x3eb34a60, 0x04bd, 0x41d9, \
{ 0x9f, 0x60, 0x88, 0x26, 0x94, 0xe6, 0x1c, 0x38 } }
/**
* 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 nsCSSStyleSheet, with which the
* |nsStyleSet| uses an |nsCSSRuleProcessor| to access the rules.
*/
class nsIStyleSheet : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISTYLE_SHEET_IID)
// basic style sheet data
virtual nsIURI* GetSheetURI() const = 0;
virtual nsIURI* GetBaseURI() const = 0;
virtual void GetTitle(nsString& aTitle) const = 0;
virtual void GetType(nsString& aType) const = 0;
virtual 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.
*
*/
virtual PRBool IsApplicable() const = 0;
/**
* Set the stylesheet to be enabled. This may or may not make it
* applicable. Note that this WILL inform the sheet's document of
* its new applicable state if the state changes but WILL NOT call
* BeginUpdate() or EndUpdate() on the document -- calling those is
* the caller's responsibility. This allows use of SetEnabled when
* batched updates are desired. If you want updates handled for
* you, see nsIDOMStyleSheet::SetDisabled().
*/
virtual void SetEnabled(PRBool aEnabled) = 0;
/**
* Whether the sheet is complete.
*/
virtual PRBool IsComplete() const = 0;
virtual void SetComplete() = 0;
// style sheet owner info
virtual nsIStyleSheet* GetParentSheet() const = 0; // may be null
virtual nsIDocument* GetOwningDocument() const = 0; // may be null
virtual void SetOwningDocument(nsIDocument* aDocument) = 0;
#ifdef DEBUG
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const = 0;
#endif
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIStyleSheet, NS_ISTYLE_SHEET_IID)
#endif /* nsIStyleSheet_h___ */