Mozilla/mozilla/layout/base/src/nsFrameImageLoader.h
kipp%netscape.com b9e3a13664 Reworked to support mulitple frames per image loader
git-svn-id: svn://10.0.0.236/trunk@27378 18797224-902f-48f8-a5cc-f745e15eee43
1999-04-13 21:49:28 +00:00

127 lines
3.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsFrameImageLoader_h___
#define nsFrameImageLoader_h___
#include "nsSize.h"
#include "nsString.h"
#include "nsVoidArray.h"
#include "nsIFrameImageLoader.h"
#include "nsIPresContext.h"
#include "nsIImageObserver.h"
struct nsRect;
/**
* An image loader for frame's.
*/
class nsFrameImageLoader : public nsIFrameImageLoader,
public nsIImageRequestObserver
{
public:
// nsISupports
NS_DECL_ISUPPORTS
// nsIImageRequestObserver
virtual void Notify(nsIImageRequest *aImageRequest,
nsIImage *aImage,
nsImageNotification aNotificationType,
PRInt32 aParam1, PRInt32 aParam2,
void *aParam3);
virtual void NotifyError(nsIImageRequest *aImageRequest,
nsImageError aErrorType);
// nsFrameImageLoader API
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIImageGroup* aGroup,
const nsString& aURL,
const nscolor* aBackgroundColor,
const nsSize* aDesiredSize,
nsIFrame* aTargetFrame,
nsIFrameImageLoaderCB aCallBack,
void* aClosure);
NS_IMETHOD StopImageLoad();
NS_IMETHOD AbortImageLoad();
NS_IMETHOD IsSameImageRequest(const nsString& aURL,
const nscolor* aBackgroundColor,
const nsSize* aDesiredSize,
PRBool* aResult);
NS_IMETHOD AddFrame(nsIFrame* aFrame, nsIFrameImageLoaderCB aCallBack,
void* aClosure);
NS_IMETHOD RemoveFrame(nsIFrame* aFrame);
// See if its safe to destroy this image loader. Its safe if there
// are no more frames using the loader and we aren't in the middle
// of processing a callback.
NS_IMETHOD SafeToDestroy(PRBool* aResult);
NS_IMETHOD GetURL(nsString& aResult);
NS_IMETHOD GetImage(nsIImage** aResult);
// Return the size of the image, in twips
NS_IMETHOD GetSize(nsSize& aResult);
NS_IMETHOD GetImageLoadStatus(PRUint32* aLoadStatus);
protected:
nsFrameImageLoader();
virtual ~nsFrameImageLoader();
void DamageRepairFrames(const nsRect* aDamageRect);
void NotifyFrames();
nsIPresContext* mPresContext;
nsIImageRequest* mImageRequest;
nsIImage* mImage;
PRPackedBool mHaveBackgroundColor;
PRPackedBool mHaveDesiredSize;
nsString mURL;
nscolor mBackgroundColor;
nsSize mDesiredSize;
nsSize mImageSize;
PRUint32 mImageLoadStatus;
nsImageError mImageLoadError;
PRInt32 mNotifyLockCount;
struct PerFrameData {
PerFrameData* mNext;
nsIFrame* mFrame;
nsIFrameImageLoaderCB mCallBack;
void* mClosure;
};
PerFrameData* mFrames;
friend NS_LAYOUT nsresult NS_NewFrameImageLoader(nsIFrameImageLoader**);
};
extern NS_LAYOUT nsresult
NS_NewFrameImageLoader(nsIFrameImageLoader** aInstancePtrResult);
#endif /* nsFrameImageLoader_h___ */