зеркало из https://github.com/mozilla/gecko-dev.git
285 строки
10 KiB
C++
285 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 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 Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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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) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 NPL, 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 NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsImageFrame_h___
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#define nsImageFrame_h___
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#include "nsSplittableFrame.h"
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#include "nsString.h"
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#include "nsAString.h"
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#include "nsIPresContext.h"
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#include "nsIImageFrame.h"
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#include "nsTransform2D.h"
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#include "imgIRequest.h"
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#include "imgIDecoderObserver.h"
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#include "imgIContainerObserver.h"
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class nsIFrame;
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class nsImageMap;
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class nsIURI;
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class nsILoadGroup;
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struct nsHTMLReflowState;
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struct nsHTMLReflowMetrics;
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struct nsSize;
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class nsImageFrame;
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class nsImageListener : public imgIDecoderObserver
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{
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public:
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nsImageListener(nsImageFrame *aFrame);
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virtual ~nsImageListener();
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NS_DECL_ISUPPORTS
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NS_DECL_IMGIDECODEROBSERVER
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NS_DECL_IMGICONTAINEROBSERVER
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void SetFrame(nsImageFrame *frame) { mFrame = frame; }
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private:
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nsImageFrame *mFrame;
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};
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struct ImageLoad {
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ImageLoad() : mIntrinsicSize(0,0) { }
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nsCOMPtr<imgIRequest> mRequest;
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nsSize mIntrinsicSize;
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nsTransform2D mTransform;
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};
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#define ImageFrameSuper nsSplittableFrame
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class nsImageFrame : public ImageFrameSuper, public nsIImageFrame {
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public:
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nsImageFrame();
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// nsISupports
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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NS_IMETHOD Destroy(nsIPresContext* aPresContext);
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsISupports* aSubContent);
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NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
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NS_IMETHOD GetContentForEvent(nsIPresContext* aPresContext,
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nsEvent* aEvent,
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nsIContent** aContent);
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NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus* aEventStatus);
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NS_IMETHOD GetCursor(nsIPresContext* aPresContext,
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nsPoint& aPoint,
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PRInt32& aCursor);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType,
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PRInt32 aHint);
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#ifdef ACCESSIBILITY
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NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
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#endif
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NS_IMETHOD GetFrameType(nsIAtom** aResult) const;
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#ifdef DEBUG
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NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
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#endif
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NS_IMETHOD GetIntrinsicImageSize(nsSize& aSize);
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NS_IMETHOD GetNaturalImageSize(PRUint32* naturalWidth,
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PRUint32 *naturalHeight);
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NS_IMETHOD GetImageRequest(imgIRequest **aRequest);
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NS_IMETHOD IsImageComplete(PRBool* aComplete);
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#ifdef DEBUG
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
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#endif
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NS_IMETHOD OnStartDecode(imgIRequest *aRequest, nsIPresContext *aCX);
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NS_IMETHOD OnStartContainer(imgIRequest *aRequest, nsIPresContext *aCX, imgIContainer *aImage);
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NS_IMETHOD OnStartFrame(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame);
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NS_IMETHOD OnDataAvailable(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame, const nsRect * rect);
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NS_IMETHOD OnStopFrame(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame);
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NS_IMETHOD OnStopContainer(imgIRequest *aRequest, nsIPresContext *aCX, imgIContainer *aImage);
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NS_IMETHOD OnStopDecode(imgIRequest *aRequest, nsIPresContext *aCX, nsresult aStatus, const PRUnichar *aStatusArg);
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NS_IMETHOD FrameChanged(imgIContainer *aContainer, nsIPresContext *aCX, gfxIImageFrame *aNewframe, nsRect *aDirtyRect);
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protected:
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// nsISupports
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NS_IMETHOD_(nsrefcnt) AddRef(void);
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NS_IMETHOD_(nsrefcnt) Release(void);
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virtual ~nsImageFrame();
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virtual void GetDesiredSize(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredSize);
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nsImageMap* GetImageMap(nsIPresContext* aPresContext);
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void TriggerLink(nsIPresContext* aPresContext,
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const nsString& aURLSpec,
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const nsString& aTargetSpec,
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PRBool aClick);
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PRBool IsServerImageMap();
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void TranslateEventCoords(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsPoint& aResult);
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PRBool GetAnchorHREFAndTarget(nsString& aHref, nsString& aTarget);
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PRIntn GetSuppress();
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void MeasureString(const PRUnichar* aString,
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PRInt32 aLength,
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nscoord aMaxWidth,
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PRUint32& aMaxFit,
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nsIRenderingContext& aContext);
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void DisplayAltText(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsString& aAltText,
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const nsRect& aRect);
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void DisplayAltFeedback(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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PRInt32 aIconId);
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void GetInnerArea(nsIPresContext* aPresContext,
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nsRect& aInnerArea) const;
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protected:
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inline PRBool CanLoadImage(nsIURI *aURI);
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inline void GetURI(const nsAString& aSpec, nsIURI **aURI);
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inline void GetRealURI(const nsAString& aSpec, nsIURI **aURI);
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inline void GetBaseURI(nsIURI **uri);
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inline void GetLoadGroup(nsIPresContext *aPresContext, nsILoadGroup **aLoadGroup);
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void FireDOMEvent(PRUint32 aMessage);
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private:
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nsresult LoadImage(const nsAString& aSpec, nsIPresContext *aPresContext, imgIRequest *aRequest, PRBool aCheckContentPolicy = PR_TRUE);
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nsresult RealLoadImage(const nsAString& aSpec, nsIPresContext *aPresContext, imgIRequest *aRequest, PRBool aCheckContentPolicy = PR_TRUE);
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inline int GetImageLoad(imgIRequest *aRequest);
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nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
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void GetDocumentCharacterSet(nsAString& aCharset) const;
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nsImageMap* mImageMap;
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nsCOMPtr<imgIDecoderObserver> mListener;
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/**
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* 0 is the current image being displayed on the screen.
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* 1 is for attribute changed images.
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* when the load from 1 completes, it will replace 0.
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*/
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struct ImageLoad mLoads[2];
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nsSize mComputedSize;
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nsSize mIntrinsicSize;
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PRPackedBool mSizeConstrained;
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PRPackedBool mGotInitialReflow;
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PRPackedBool mInitialLoadCompleted;
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PRPackedBool mCanSendLoadEvent;
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PRPackedBool mImageBlocked; // true if the image has been blocked
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PRPackedBool mFailureReplace;
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nsMargin mBorderPadding;
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PRUint32 mNaturalImageWidth,
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mNaturalImageHeight;
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/* loading / broken image icon support */
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// LoadIcons: initiate the loading of the static icons used to show loading / broken images
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nsresult LoadIcons(nsIPresContext *aPresContext);
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// HandleIconLoads: See if the request is for an Icon load. If it is, handle it and return TRUE
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// otherwise, return FALSE (aCompleted is an input arg telling the routine if the request has completed)
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PRBool HandleIconLoads(imgIRequest* aRequest, PRBool aCompleted);
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void InvalidateIcon(nsIPresContext *aPresContext);
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class IconLoad {
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// private class that wraps the data and logic needed for
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// broken image and loading image icons
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public:
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IconLoad(nsIPresContext *aPresContext):mRefCount(0),mIconsLoaded(PR_FALSE) { GetPrefs(aPresContext); }
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void AddRef(void) { ++mRefCount; }
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PRBool Release(void) { return --mRefCount == 0; }
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void GetPrefs(nsIPresContext *aPresContext);
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PRUint32 mRefCount;
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struct ImageLoad mIconLoads[2]; // 0 is for the 'loading' icon, 1 is for the 'broken' icon
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PRPackedBool mIconsLoaded;
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PRPackedBool mPrefForceInlineAltText;
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PRPackedBool mPrefAllImagesBlocked;
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PRPackedBool mPrefShowPlaceholders;
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};
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static IconLoad* mIconLoad; // singleton patern: one LoadIcons instance is used
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};
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#endif /* nsImageFrame_h___ */
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