gecko-dev/layout/style/nsIStyleSheet.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* interface representing a collection of style data attached to a
* document, which may be or be combined into a style rule processor
*/
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#ifndef nsIStyleSheet_h___
#define nsIStyleSheet_h___
#include "mozilla/MemoryReporting.h"
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#include <stdio.h>
#include "nsISupports.h"
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class nsString;
class nsIURI;
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class nsIDocument;
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// IID for the nsIStyleSheet interface
// 3eb34a60-04bd-41d9-9f60-882694e61c38
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#define NS_ISTYLE_SHEET_IID \
{ 0x3eb34a60, 0x04bd, 0x41d9, \
{ 0x9f, 0x60, 0x88, 0x26, 0x94, 0xe6, 0x1c, 0x38 } }
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/**
* 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.
*/
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class nsIStyleSheet : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISTYLE_SHEET_IID)
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// 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 bool HasRules() const = 0;
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/**
* 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 bool 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(bool aEnabled) = 0;
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/**
* Whether the sheet is complete.
*/
virtual bool IsComplete() const = 0;
virtual void SetComplete() = 0;
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// 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;
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#ifdef DEBUG
virtual void List(FILE* out = stdout, int32_t aIndent = 0) const = 0;
#endif
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const = 0;
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};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIStyleSheet, NS_ISTYLE_SHEET_IID)
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#endif /* nsIStyleSheet_h___ */