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85 lines
2.9 KiB
C++
85 lines
2.9 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 nsIFrameImageLoader_h___
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#define nsIFrameImageLoader_h___
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#include "nslayout.h"
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#include "nsIImageObserver.h"
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#include "nsColor.h"
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class nsIFrame;
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class nsIImage;
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class nsIImageGroup;
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class nsIPresContext;
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class nsString;
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struct nsSize;
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/* a9970300-e918-11d1-89cc-006008911b81 */
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#define NS_IFRAME_IMAGE_LOADER_IID \
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{ 0xa9970300,0xe918,0x11d1,{0x89, 0xcc, 0x00, 0x60, 0x08, 0x91, 0x1b, 0x81} }
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// Type of callback function used during image loading. The frame
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// image loader will invoke this callback as notifications occur from
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// the image library.
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typedef nsresult (*nsFrameImageLoaderCB)(nsIPresContext& aPresContext,
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nsIFrame* aFrame,
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PRIntn aStatus);
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/**
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* Abstract interface for frame image loaders. Frame image loaders
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* know how to respond to nsIImageRequestObserver notifications and
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* generate the appropriate rendering/reflow operation for a target
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* frame.
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*/
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class nsIFrameImageLoader : public nsIImageRequestObserver {
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public:
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIImageGroup* aGroup,
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const nsString& aURL,
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const nscolor* aBackgroundColor,
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nsIFrame* aTargetFrame,
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const nsSize& aDesiredSize,
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nsFrameImageLoaderCB aCallBack,
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PRBool aNeedSizeUpdate,
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PRBool aNeedErrorNotification) = 0;
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NS_IMETHOD StopImageLoad() = 0;
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NS_IMETHOD AbortImageLoad() = 0;
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NS_IMETHOD GetTargetFrame(nsIFrame*& aFrameResult) const = 0;
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NS_IMETHOD GetURL(nsString& aResult) const = 0;
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NS_IMETHOD GetImage(nsIImage*& aResult) const = 0;
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NS_IMETHOD GetSize(nsSize& aResult) const = 0;
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NS_IMETHOD GetImageLoadStatus(PRIntn& aLoadStatus) const = 0;
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};
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// Image load status bit values
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#define NS_IMAGE_LOAD_STATUS_NONE 0x0
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#define NS_IMAGE_LOAD_STATUS_SIZE_REQUESTED 0x1
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#define NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE 0x2
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#define NS_IMAGE_LOAD_STATUS_IMAGE_READY 0x4
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#define NS_IMAGE_LOAD_STATUS_ERROR 0x8
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#define NS_IMAGE_LOAD_STATUS_ERROR_REQUESTED 0x10
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#endif /* nsIFrameImageLoader_h___ */
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