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115 lines
4.1 KiB
C++
115 lines
4.1 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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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 "nsISupports.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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/* a6cf90ec-15b3-11d2-932e-00805f8add32 */
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#define NS_IFRAME_IMAGE_LOADER_IID \
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{ 0xa6cf90ec, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
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enum nsImageAnimation {
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eImageAnimation_Normal = 0, // looping controlled by image
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eImageAnimation_None = 1, // don't loop; just show first frame
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eImageAnimation_LoopOnce = 2 // loop just once
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};
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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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class nsIFrameImageLoader;
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typedef nsresult (*nsIFrameImageLoaderCB)(nsIPresContext* aPresContext,
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nsIFrameImageLoader* aLoader,
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nsIFrame* aFrame,
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void* aClosure,
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PRUint32 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 nsISupports {
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public:
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static const nsIID& GetIID() {static nsIID iid = NS_IFRAME_IMAGE_LOADER_IID; return iid;}
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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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const nsSize* aDesiredSize,
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nsIFrame* aFrame,
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nsImageAnimation aAnimationMode,
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nsIFrameImageLoaderCB aCallBack,
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void* aClosure, void* aKey) = 0;
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NS_IMETHOD StopImageLoad(PRBool aStopChrome = PR_TRUE) = 0;
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NS_IMETHOD AbortImageLoad() = 0;
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NS_IMETHOD IsSameImageRequest(const nsString& aURL,
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const nscolor* aBackgroundColor,
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const nsSize* aDesiredSize,
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PRBool* aResult) = 0;
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NS_IMETHOD AddFrame(nsIFrame* aFrame, nsIFrameImageLoaderCB aCallBack,
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void* aClosure, void* aKey) = 0;
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NS_IMETHOD RemoveFrame(void* aKey) = 0;
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NS_IMETHOD SafeToDestroy(PRBool* aResult) = 0;
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NS_IMETHOD GetURL(nsString& aResult) = 0;
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NS_IMETHOD GetPresContext(nsIPresContext** aPresContext) = 0;
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NS_IMETHOD GetImage(nsIImage** aResult) = 0;
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// Return the size of the image, in twips
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NS_IMETHOD GetSize(nsSize& aResult) = 0;
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NS_IMETHOD GetImageLoadStatus(PRUint32* aLoadStatus) = 0;
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// Return the intrinsic (or natural) size of the image, in twips.
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// Returns 0,0 if the dimensions are unknown
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NS_IMETHOD GetIntrinsicSize(nsSize& aResult) = 0;
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NS_IMETHOD GetNaturalImageSize(PRUint32* naturalWidth, PRUint32 *naturalHeight) = 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_AVAILABLE 0x1
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#define NS_IMAGE_LOAD_STATUS_IMAGE_READY 0x2
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#define NS_IMAGE_LOAD_STATUS_ERROR 0x4
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#endif /* nsIFrameImageLoader_h___ */
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