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78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsIImageRequest_h___
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#define nsIImageRequest_h___
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#include <stdio.h>
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#include "nsISupports.h"
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#include "nscore.h"
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class nsIImageRequestObserver;
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class nsIImage;
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// IID for the nsIImageRequest interface
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#define NS_IIMAGEREQUEST_IID \
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{ 0xc31444c0, 0xaec9, 0x11d1, \
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{ 0x9b, 0xc3, 0x00, 0x60, 0x08, 0x8c, 0xa6, 0xb3 } }
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/**
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*
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* An image request generated as a result of invoking the
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* <code>GetImage</code> method of the <code>nsIImageGroup</code>
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* interface.
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*/
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class nsIImageRequest : public nsISupports {
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public:
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static const nsIID& IID() { static nsIID iid = NS_IIMAGEREQUEST_IID; return iid; }
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/// @return the image object associated with the request.
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virtual nsIImage* GetImage() = 0;
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/**
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* Returns the natural dimensions of the image. Returns 0,0
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* if the dimensions are unknown.
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*
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* Note: the dimensions that are returned are in pixels
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*
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* @param aWidth, aHeight - pointers to integers to be filled in with
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* the dimensions.
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*/
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virtual void GetNaturalDimensions(PRUint32 *aWidth, PRUint32 *aHeight) = 0;
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/**
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* Add an observers to be informed of image loading notifications.
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*
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* @param aObserver - An observer to add to the observer list.
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* @param boolean indicating whether addition was successful.
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*/
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virtual PRBool AddObserver(nsIImageRequestObserver *aObserver) = 0;
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/**
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* Remove a previously added observer from the observer list.
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*
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* @param aObserver - An observer to remove from the observer list.
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* @param boolean indicating whether the removal was successful.
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*/
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virtual PRBool RemoveObserver(nsIImageRequestObserver *aObserver) = 0;
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/// Interrupt loading of just this image.
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virtual void Interrupt() = 0;
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};
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#endif
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