Back to index

lightning-sunbird  0.9+nobinonly
nsITheme.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
00002  *
00003  * ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is the Mozilla browser.
00017  *
00018  * The Initial Developer of the Original Code is
00019  * Netscape Communications Corporation.
00020  * Portions created by the Initial Developer are Copyright (C) 1999
00021  * the Initial Developer. All Rights Reserved.
00022  *
00023  * Contributor(s):
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsITheme_h_
00040 #define nsITheme_h_
00041 
00042 #include "nsISupports.h"
00043 #include "nsCOMPtr.h"
00044 #include "nsColor.h"
00045 
00046 struct nsRect;
00047 struct nsSize;
00048 struct nsFont;
00049 struct nsMargin;
00050 class nsPresContext;
00051 class nsIRenderingContext;
00052 class nsIDeviceContext;
00053 class nsIFrame;
00054 class nsIContent;
00055 class nsIAtom;
00056 
00057 // IID for the nsITheme interface
00058 // {75220e36-b77a-464c-bd82-988cf86391cc}
00059 #define NS_ITHEME_IID     \
00060 { 0x75220e36, 0xb77a, 0x464c, { 0xbd, 0x82, 0x98, 0x8c, 0xf8, 0x63, 0x91, 0xcc } }
00061 
00062 // {D930E29B-6909-44e5-AB4B-AF10D6923705}
00063 #define NS_THEMERENDERER_CID \
00064 { 0xd930e29b, 0x6909, 0x44e5, { 0xab, 0x4b, 0xaf, 0x10, 0xd6, 0x92, 0x37, 0x5 } }
00065 
00066 class nsITheme: public nsISupports {
00067 public:
00068   NS_DEFINE_STATIC_IID_ACCESSOR(NS_ITHEME_IID)
00069   
00070   NS_IMETHOD DrawWidgetBackground(nsIRenderingContext* aContext,
00071                                   nsIFrame* aFrame,
00072                                   PRUint8 aWidgetType,
00073                                   const nsRect& aRect,
00074                                   const nsRect& aClipRect)=0;
00075 
00076   NS_IMETHOD GetWidgetBorder(nsIDeviceContext* aContext, 
00077                              nsIFrame* aFrame,
00078                              PRUint8 aWidgetType,
00079                              nsMargin* aResult)=0;
00080 
00081   // This method can return PR_FALSE to indicate that the CSS padding value
00082   // should be used.  Otherwise, it will fill in aResult with the desired
00083   // padding and return PR_TRUE.
00084   virtual PRBool GetWidgetPadding(nsIDeviceContext* aContext,
00085                                   nsIFrame* aFrame,
00086                                   PRUint8 aWidgetType,
00087                                   nsMargin* aResult) = 0;
00088 
00089   // This method can return PR_FALSE to indicate that no special overflow
00090   // area is required by the native widget. Otherwise it will fill in
00091   // aResult with the desired overflow area and return PR_TRUE.
00092   virtual PRBool GetWidgetOverflow(nsIDeviceContext* aContext,
00093                                    nsIFrame* aFrame,
00094                                    PRUint8 aWidgetType,
00095                                    nsRect* aResult)
00096   { return PR_FALSE; }
00097 
00098   NS_IMETHOD GetMinimumWidgetSize(nsIRenderingContext* aContext, nsIFrame* aFrame,
00099                                   PRUint8 aWidgetType,
00100                                   nsSize* aResult,
00101                                   PRBool* aIsOverridable)=0;
00102 
00103   NS_IMETHOD WidgetStateChanged(nsIFrame* aFrame, PRUint8 aWidgetType, 
00104                                 nsIAtom* aAttribute, PRBool* aShouldRepaint)=0;
00105 
00106   NS_IMETHOD ThemeChanged()=0;
00107 
00108   virtual PRBool ThemeSupportsWidget(nsPresContext* aPresContext,
00109                                      nsIFrame* aFrame,
00110                                      PRUint8 aWidgetType)=0;
00111 
00112   virtual PRBool WidgetIsContainer(PRUint8 aWidgetType)=0;
00113 };
00114 
00115 // Creator function
00116 extern NS_METHOD NS_NewNativeTheme(nsISupports *aOuter, REFNSIID aIID, void **aResult);
00117 
00118 #endif