gecko/layout/style/nsICSSRule.h

104 lines
3.7 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) 1999
* 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
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* ***** END LICENSE BLOCK ***** */
/* internal interface for all rule types in a CSS style sheet */
#ifndef nsICSSRule_h___
#define nsICSSRule_h___
#include "nsIStyleRule.h"
#include "nsIDOMCSSRule.h"
class nsCSSStyleSheet;
class nsICSSGroupRule;
class nsAString;
// IID for the nsICSSRule interface {72250d73-dbb2-4409-90fe-e8e0283a2510}
#define NS_ICSS_RULE_IID \
{ 0x72250d73, 0xdbb2, 0x4409, \
{ 0x90, 0xfe, 0xe8, 0xe0, 0x28, 0x3a, 0x25, 0x10 } }
// inheriting from nsIStyleRule is only for style rules, not other rule types
class nsICSSRule : public nsIStyleRule {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSS_RULE_IID)
// The constants in this list must maintain the following invariants:
// If a rule of type N must appear before a rule of type M in stylesheets
// then N < M
// Note that nsCSSStyleSheet::RebuildChildList assumes that no other kinds of
// rules can come between two rules of type IMPORT_RULE.
enum {
UNKNOWN_RULE = 0,
CHARSET_RULE,
IMPORT_RULE,
NAMESPACE_RULE,
STYLE_RULE,
MEDIA_RULE,
FONT_FACE_RULE,
PAGE_RULE,
DOCUMENT_RULE
};
NS_IMETHOD GetType(PRInt32& aType) const = 0;
NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const = 0;
NS_IMETHOD SetStyleSheet(nsCSSStyleSheet* aSheet) = 0;
NS_IMETHOD SetParentRule(nsICSSGroupRule* aRule) = 0;
NS_IMETHOD Clone(nsICSSRule*& aClone) const = 0;
// Note that this returns null for inline style rules since they aren't
// supposed to have a DOM rule representation (and our code wouldn't work).
nsresult GetDOMRule(nsIDOMCSSRule** aDOMRule)
{
nsresult rv;
NS_IF_ADDREF(*aDOMRule = GetDOMRuleWeak(&rv));
return rv;
}
virtual nsIDOMCSSRule* GetDOMRuleWeak(nsresult* aResult) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSRule, NS_ICSS_RULE_IID)
/* Define global NS_New* functions for rules that don't need their own
interfaces here */
nsresult
NS_NewCSSCharsetRule(nsICSSRule** aInstancePtrResult,
const nsAString& aEncoding);
#endif /* nsICSSRule_h___ */