mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/layout/generic/nsImageFrame.h

287 строки
10 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsImageFrame_h___
#define nsImageFrame_h___
#include "nsSplittableFrame.h"
#include "nsString.h"
#include "nsAString.h"
#include "nsIPresContext.h"
#include "nsIImageFrame.h"
#include "nsTransform2D.h"
#include "imgIRequest.h"
#include "imgIDecoderObserver.h"
#include "imgIContainerObserver.h"
class nsIFrame;
class nsImageMap;
class nsIURI;
class nsILoadGroup;
struct nsHTMLReflowState;
struct nsHTMLReflowMetrics;
struct nsSize;
class nsImageFrame;
class nsImageListener : public imgIDecoderObserver
{
public:
nsImageListener(nsImageFrame *aFrame);
virtual ~nsImageListener();
NS_DECL_ISUPPORTS
NS_DECL_IMGIDECODEROBSERVER
NS_DECL_IMGICONTAINEROBSERVER
void SetFrame(nsImageFrame *frame) { mFrame = frame; }
private:
nsImageFrame *mFrame;
};
struct ImageLoad {
ImageLoad() : mIntrinsicSize(0,0) { }
nsCOMPtr<imgIRequest> mRequest;
nsSize mIntrinsicSize;
nsTransform2D mTransform;
};
#define ImageFrameSuper nsSplittableFrame
class nsImageFrame : public ImageFrameSuper, public nsIImageFrame {
public:
nsImageFrame();
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags = 0);
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD ContentChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent);
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
NS_IMETHOD GetContentForEvent(nsIPresContext* aPresContext,
nsEvent* aEvent,
nsIContent** aContent);
NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD GetCursor(nsIPresContext* aPresContext,
nsPoint& aPoint,
PRInt32& aCursor);
NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType,
PRInt32 aHint);
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
NS_IMETHOD GetFrameType(nsIAtom** aResult) const;
#ifdef DEBUG
NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
#endif
NS_IMETHOD GetImageMap(nsIPresContext *aPresContext, nsIImageMap **aImageMap);
NS_IMETHOD GetIntrinsicImageSize(nsSize& aSize);
NS_IMETHOD GetNaturalImageSize(PRUint32* naturalWidth,
PRUint32 *naturalHeight);
NS_IMETHOD GetImageRequest(imgIRequest **aRequest);
NS_IMETHOD IsImageComplete(PRBool* aComplete);
#ifdef DEBUG
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
NS_IMETHOD OnStartDecode(imgIRequest *aRequest, nsIPresContext *aCX);
NS_IMETHOD OnStartContainer(imgIRequest *aRequest, nsIPresContext *aCX, imgIContainer *aImage);
NS_IMETHOD OnStartFrame(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame);
NS_IMETHOD OnDataAvailable(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame, const nsRect * rect);
NS_IMETHOD OnStopFrame(imgIRequest *aRequest, nsIPresContext *aCX, gfxIImageFrame *aFrame);
NS_IMETHOD OnStopContainer(imgIRequest *aRequest, nsIPresContext *aCX, imgIContainer *aImage);
NS_IMETHOD OnStopDecode(imgIRequest *aRequest, nsIPresContext *aCX, nsresult aStatus, const PRUnichar *aStatusArg);
NS_IMETHOD FrameChanged(imgIContainer *aContainer, nsIPresContext *aCX, gfxIImageFrame *aNewframe, nsRect *aDirtyRect);
protected:
// nsISupports
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
virtual ~nsImageFrame();
virtual void GetDesiredSize(nsIPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsHTMLReflowMetrics& aDesiredSize);
nsImageMap* GetImageMap(nsIPresContext* aPresContext);
void TriggerLink(nsIPresContext* aPresContext,
const nsString& aURLSpec,
const nsString& aTargetSpec,
PRBool aClick);
PRBool IsServerImageMap();
void TranslateEventCoords(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsPoint& aResult);
PRBool GetAnchorHREFAndTarget(nsString& aHref, nsString& aTarget);
PRIntn GetSuppress();
void MeasureString(const PRUnichar* aString,
PRInt32 aLength,
nscoord aMaxWidth,
PRUint32& aMaxFit,
nsIRenderingContext& aContext);
void DisplayAltText(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsString& aAltText,
const nsRect& aRect);
void DisplayAltFeedback(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
PRInt32 aIconId);
void GetInnerArea(nsIPresContext* aPresContext,
nsRect& aInnerArea) const;
protected:
inline PRBool CanLoadImage(nsIURI *aURI);
inline void GetURI(const nsAString& aSpec, nsIURI **aURI);
inline void GetRealURI(const nsAString& aSpec, nsIURI **aURI);
inline void GetBaseURI(nsIURI **uri);
inline void GetLoadGroup(nsIPresContext *aPresContext, nsILoadGroup **aLoadGroup);
void FireDOMEvent(PRUint32 aMessage);
private:
nsresult LoadImage(const nsAString& aSpec, nsIPresContext *aPresContext, imgIRequest *aRequest, PRBool aCheckContentPolicy = PR_TRUE);
nsresult RealLoadImage(const nsAString& aSpec, nsIPresContext *aPresContext, imgIRequest *aRequest, PRBool aCheckContentPolicy = PR_TRUE);
inline int GetImageLoad(imgIRequest *aRequest);
nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
void GetDocumentCharacterSet(nsAString& aCharset) const;
nsImageMap* mImageMap;
nsCOMPtr<imgIDecoderObserver> mListener;
/**
* 0 is the current image being displayed on the screen.
* 1 is for attribute changed images.
* when the load from 1 completes, it will replace 0.
*/
struct ImageLoad mLoads[2];
nsSize mComputedSize;
nsSize mIntrinsicSize;
PRPackedBool mSizeConstrained;
PRPackedBool mGotInitialReflow;
PRPackedBool mInitialLoadCompleted;
PRPackedBool mCanSendLoadEvent;
PRPackedBool mImageBlocked; // true if the image has been blocked
PRPackedBool mFailureReplace;
nsMargin mBorderPadding;
PRUint32 mNaturalImageWidth,
mNaturalImageHeight;
/* loading / broken image icon support */
// LoadIcons: initiate the loading of the static icons used to show loading / broken images
nsresult LoadIcons(nsIPresContext *aPresContext);
// HandleIconLoads: See if the request is for an Icon load. If it is, handle it and return TRUE
// otherwise, return FALSE (aCompleted is an input arg telling the routine if the request has completed)
PRBool HandleIconLoads(imgIRequest* aRequest, PRBool aCompleted);
void InvalidateIcon(nsIPresContext *aPresContext);
class IconLoad {
// private class that wraps the data and logic needed for
// broken image and loading image icons
public:
IconLoad(nsIPresContext *aPresContext):mRefCount(0),mIconsLoaded(PR_FALSE) { GetPrefs(aPresContext); }
void AddRef(void) { ++mRefCount; }
PRBool Release(void) { return --mRefCount == 0; }
void GetPrefs(nsIPresContext *aPresContext);
PRUint32 mRefCount;
struct ImageLoad mIconLoads[2]; // 0 is for the 'loading' icon, 1 is for the 'broken' icon
PRPackedBool mIconsLoaded;
PRPackedBool mPrefForceInlineAltText;
PRPackedBool mPrefAllImagesBlocked;
PRPackedBool mPrefShowPlaceholders;
};
static IconLoad* mIconLoad; // singleton patern: one LoadIcons instance is used
};
#endif /* nsImageFrame_h___ */
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку