--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/CachedResourceClient.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,83 @@
+/*
+    Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
+    Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
+    Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    This class provides all functionality needed for loading images, style sheets and html
+    pages from the web. It has a memory cache for these objects.
+*/
+
+#ifndef CachedResourceClient_h
+#define CachedResourceClient_h
+
+#include <wtf/FastAllocBase.h>
+
+#if ENABLE(XBL)
+namespace XBL {
+    class XBLDocument;
+}
+#endif
+
+namespace WebCore {
+
+    class CachedCSSStyleSheet;
+    class CachedFont;
+    class CachedResource;
+    class CachedImage;
+    class String;
+    class Image;
+    class IntRect;
+    class KURL;
+
+    /**
+     * @internal
+     *
+     * a client who wants to load stylesheets, images or scripts from the web has to
+     * inherit from this class and overload one of the 3 functions
+     *
+     */
+    class CachedResourceClient : public FastAllocBase
+    {
+    public:
+        virtual ~CachedResourceClient() { }
+
+        // Called whenever a frame of an image changes, either because we got more data from the network or
+        // because we are animating. If not null, the IntRect is the changed rect of the image.
+        virtual void imageChanged(CachedImage*, const IntRect* = 0) { };
+        
+        // Called to find out if this client wants to actually display the image.  Used to tell when we
+        // can halt animation.  Content nodes that hold image refs for example would not render the image,
+        // but RenderImages would (assuming they have visibility: visible and their render tree isn't hidden
+        // e.g., in the b/f cache or in a background tab).
+        virtual bool willRenderImage(CachedImage*) { return false; }
+
+        virtual void setCSSStyleSheet(const String& /* href */, const KURL& /* baseURL */, const String& /* charset */, const CachedCSSStyleSheet*) { }
+        virtual void setXSLStyleSheet(const String& /* href */, const KURL& /* baseURL */, const String& /* sheet */) { }
+
+        virtual void fontLoaded(CachedFont*) {};
+
+#if ENABLE(XBL)
+        virtual void setXBLDocument(const String& /*URL*/, XBL::XBLDocument*) { }
+#endif
+
+        virtual void notifyFinished(CachedResource*) { }
+    };
+
+}
+
+#endif