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This file is part of the KDE libraries
Copyright (C) 1998 Lars Knoll (
Copyright (C) 2001 Dirk Mueller <>
Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
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
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
namespace XBL {
class XBLDocument;
namespace WebCore {
class CachedFont;
class CachedResource;
class CachedImage;
class String;
class Image;
class IntRect;
* @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
virtual ~CachedResourceClient() { }
// Called whenever a frame of an image changes, either because we got more data from the network or
// because we are animating.
virtual void imageChanged(CachedImage*) { };
// 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& /*URL*/, const String& /*charset*/, const String& /*sheet*/) { }
virtual void setXSLStyleSheet(const String& /*URL*/, const String& /*sheet*/) { }
virtual void fontLoaded(CachedFont*) {};
virtual void setXBLDocument(const String& /*URL*/, XBL::XBLDocument*) { }
virtual void notifyFinished(CachedResource*) { }