gecko-dev/gfx/public/nsITheme.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 the Mozilla browser.
*
* 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
* 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 ***** */
#ifndef nsITheme_h_
#define nsITheme_h_
#include "nsISupports.h"
#include "nsCOMPtr.h"
#include "nsColor.h"
struct nsRect;
struct nsSize;
struct nsFont;
struct nsMargin;
class nsPresContext;
class nsIRenderingContext;
class nsIDeviceContext;
class nsIFrame;
class nsIContent;
class nsIAtom;
// IID for the nsITheme interface
// {75220e36-b77a-464c-bd82-988cf86391cc}
#define NS_ITHEME_IID \
{ 0x75220e36, 0xb77a, 0x464c, { 0xbd, 0x82, 0x98, 0x8c, 0xf8, 0x63, 0x91, 0xcc } }
// {D930E29B-6909-44e5-AB4B-AF10D6923705}
#define NS_THEMERENDERER_CID \
{ 0xd930e29b, 0x6909, 0x44e5, { 0xab, 0x4b, 0xaf, 0x10, 0xd6, 0x92, 0x37, 0x5 } }
class nsITheme: public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ITHEME_IID)
NS_IMETHOD DrawWidgetBackground(nsIRenderingContext* aContext,
nsIFrame* aFrame,
PRUint8 aWidgetType,
const nsRect& aRect,
const nsRect& aClipRect)=0;
NS_IMETHOD GetWidgetBorder(nsIDeviceContext* aContext,
nsIFrame* aFrame,
PRUint8 aWidgetType,
nsMargin* aResult)=0;
// This method can return PR_FALSE to indicate that the CSS padding value
// should be used. Otherwise, it will fill in aResult with the desired
// padding and return PR_TRUE.
virtual PRBool GetWidgetPadding(nsIDeviceContext* aContext,
nsIFrame* aFrame,
PRUint8 aWidgetType,
nsMargin* aResult) = 0;
// This method can return PR_FALSE to indicate that no special overflow
// area is required by the native widget. Otherwise it will fill in
// aResult with the desired overflow area and return PR_TRUE.
virtual PRBool GetWidgetOverflow(nsIDeviceContext* aContext,
nsIFrame* aFrame,
PRUint8 aWidgetType,
nsRect* aResult)
{ return PR_FALSE; }
NS_IMETHOD GetMinimumWidgetSize(nsIRenderingContext* aContext, nsIFrame* aFrame,
PRUint8 aWidgetType,
nsSize* aResult,
PRBool* aIsOverridable)=0;
NS_IMETHOD WidgetStateChanged(nsIFrame* aFrame, PRUint8 aWidgetType,
nsIAtom* aAttribute, PRBool* aShouldRepaint)=0;
NS_IMETHOD ThemeChanged()=0;
virtual PRBool ThemeSupportsWidget(nsPresContext* aPresContext,
nsIFrame* aFrame,
PRUint8 aWidgetType)=0;
virtual PRBool WidgetIsContainer(PRUint8 aWidgetType)=0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsITheme, NS_ITHEME_IID)
// Creator function
extern NS_METHOD NS_NewNativeTheme(nsISupports *aOuter, REFNSIID aIID, void **aResult);
#endif