зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
4.0 KiB
C++
113 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Stuart Parmenter <pavlov@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* class to notify frames of background and border image loads */
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#include "nsStubImageDecoderObserver.h"
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class nsIFrame;
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class nsIURI;
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#include "imgIRequest.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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/**
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* Image loaders pass notifications for background and border image
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* loading and animation on to the frames.
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*
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* Each frame's image loaders form a linked list.
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*/
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class nsImageLoader : public nsStubImageDecoderObserver
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{
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private:
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nsImageLoader(nsIFrame *aFrame, PRUint32 aActions,
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nsImageLoader *aNextLoader);
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virtual ~nsImageLoader();
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public:
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/*
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* Flags to specify actions that can be taken for the image at various
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* times. Reflows always occur before redraws. "Decode" refers to one
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* frame being available, whereas "load" refers to all the data being loaded
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* from the network.
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*/
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enum {
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ACTION_REFLOW_ON_DECODE = 0x01,
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ACTION_REDRAW_ON_DECODE = 0x02,
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ACTION_REFLOW_ON_LOAD = 0x04,
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ACTION_REDRAW_ON_LOAD = 0x08
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};
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static already_AddRefed<nsImageLoader>
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Create(nsIFrame *aFrame, imgIRequest *aRequest,
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PRUint32 aActions, nsImageLoader *aNextLoader);
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NS_DECL_ISUPPORTS
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// imgIDecoderObserver (override nsStubImageDecoderObserver)
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NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
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NS_IMETHOD OnStopFrame(imgIRequest *aRequest, PRUint32 aFrame);
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NS_IMETHOD OnStopRequest(imgIRequest *aRequest, PRBool aLastPart);
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// Do not override OnDataAvailable since background images are not
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// displayed incrementally; they are displayed after the entire image
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// has been loaded.
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// Note: Images referenced by the <img> element are displayed
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// incrementally in nsImageFrame.cpp.
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// imgIContainerObserver (override nsStubImageDecoderObserver)
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NS_IMETHOD FrameChanged(imgIContainer *aContainer,
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const nsIntRect *aDirtyRect);
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void Destroy();
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imgIRequest *GetRequest() { return mRequest; }
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nsImageLoader *GetNextLoader() { return mNextLoader; }
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private:
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nsresult Load(imgIRequest *aImage);
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void DoReflow();
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/* if aDamageRect is nsnull, the whole frame is redrawn. */
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void DoRedraw(const nsRect* aDamageRect);
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nsIFrame *mFrame;
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nsCOMPtr<imgIRequest> mRequest;
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PRUint32 mActions;
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nsRefPtr<nsImageLoader> mNextLoader;
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};
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