зеркало из https://github.com/mozilla/pjs.git
344 строки
12 KiB
C++
344 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla 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/MPL/
|
|
*
|
|
* 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):
|
|
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/* rendering object for replaced elements with bitmap image data */
|
|
|
|
#ifndef nsImageFrame_h___
|
|
#define nsImageFrame_h___
|
|
|
|
#include "nsSplittableFrame.h"
|
|
#include "nsString.h"
|
|
#include "nsAString.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsIImageFrame.h"
|
|
#include "nsIIOService.h"
|
|
#include "nsIObserver.h"
|
|
|
|
#include "nsTransform2D.h"
|
|
#include "imgIRequest.h"
|
|
#include "nsStubImageDecoderObserver.h"
|
|
|
|
class nsIFrame;
|
|
class nsImageMap;
|
|
class nsIURI;
|
|
class nsILoadGroup;
|
|
struct nsHTMLReflowState;
|
|
struct nsHTMLReflowMetrics;
|
|
struct nsSize;
|
|
class nsDisplayImage;
|
|
|
|
class nsImageFrame;
|
|
|
|
class nsImageListener : public nsStubImageDecoderObserver
|
|
{
|
|
public:
|
|
nsImageListener(nsImageFrame *aFrame);
|
|
virtual ~nsImageListener();
|
|
|
|
NS_DECL_ISUPPORTS
|
|
// imgIDecoderObserver (override nsStubImageDecoderObserver)
|
|
NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
|
|
NS_IMETHOD OnDataAvailable(imgIRequest *aRequest, gfxIImageFrame *aFrame,
|
|
const nsRect *aRect);
|
|
NS_IMETHOD OnStopDecode(imgIRequest *aRequest, nsresult status,
|
|
const PRUnichar *statusArg);
|
|
// imgIContainerObserver (override nsStubImageDecoderObserver)
|
|
NS_IMETHOD FrameChanged(imgIContainer *aContainer, gfxIImageFrame *newframe,
|
|
nsRect * dirtyRect);
|
|
|
|
void SetFrame(nsImageFrame *frame) { mFrame = frame; }
|
|
|
|
private:
|
|
nsImageFrame *mFrame;
|
|
};
|
|
|
|
#define IMAGE_SIZECONSTRAINED 0x00100000
|
|
#define IMAGE_GOTINITIALREFLOW 0x00200000
|
|
|
|
#define ImageFrameSuper nsSplittableFrame
|
|
|
|
class nsImageFrame : public ImageFrameSuper, public nsIImageFrame {
|
|
public:
|
|
nsImageFrame(nsStyleContext* aContext);
|
|
|
|
// nsISupports
|
|
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
|
|
|
|
virtual void Destroy();
|
|
NS_IMETHOD Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow);
|
|
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists);
|
|
virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
|
|
virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
|
|
virtual nsSize GetIntrinsicRatio();
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aDesiredSize,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
|
|
NS_IMETHOD GetContentForEvent(nsPresContext* aPresContext,
|
|
nsEvent* aEvent,
|
|
nsIContent** aContent);
|
|
NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus);
|
|
NS_IMETHOD GetCursor(const nsPoint& aPoint,
|
|
nsIFrame::Cursor& aCursor);
|
|
NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType);
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
|
|
#endif
|
|
|
|
virtual nsIAtom* GetType() const;
|
|
|
|
virtual PRBool IsFrameOfType(PRUint32 aFlags) const
|
|
{
|
|
return ImageFrameSuper::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
|
|
NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
|
|
#endif
|
|
|
|
virtual PRIntn GetSkipSides() const;
|
|
|
|
NS_IMETHOD GetImageMap(nsPresContext *aPresContext, nsIImageMap **aImageMap);
|
|
|
|
NS_IMETHOD GetIntrinsicImageSize(nsSize& aSize);
|
|
|
|
static void ReleaseGlobals() {
|
|
if (gIconLoad) {
|
|
gIconLoad->Shutdown();
|
|
NS_RELEASE(gIconLoad);
|
|
}
|
|
NS_IF_RELEASE(sIOService);
|
|
}
|
|
|
|
/**
|
|
* Function to test whether aContent, which has aStyleContext as its style,
|
|
* should get an image frame. Note that this method is only used by the
|
|
* frame constructor; it's only here because it uses gIconLoad for now.
|
|
*/
|
|
static PRBool ShouldCreateImageFrameFor(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext);
|
|
|
|
void DisplayAltFeedback(nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
imgIRequest* aRequest,
|
|
nsPoint aPt);
|
|
|
|
nsRect GetInnerArea() const;
|
|
|
|
nsImageMap* GetImageMap(nsPresContext* aPresContext);
|
|
|
|
protected:
|
|
// nsISupports
|
|
NS_IMETHOD_(nsrefcnt) AddRef(void);
|
|
NS_IMETHOD_(nsrefcnt) Release(void);
|
|
|
|
virtual ~nsImageFrame();
|
|
|
|
void EnsureIntrinsicSize(nsPresContext* aPresContext);
|
|
|
|
virtual nsSize ComputeSize(nsIRenderingContext *aRenderingContext,
|
|
nsSize aCBSize, nscoord aAvailableWidth,
|
|
nsSize aMargin, nsSize aBorder, nsSize aPadding,
|
|
PRBool aShrinkWrap);
|
|
|
|
void TriggerLink(nsPresContext* aPresContext,
|
|
nsIURI* aURI,
|
|
const nsString& aTargetSpec,
|
|
nsINode* aTriggerNode,
|
|
PRBool aClick);
|
|
|
|
PRBool IsServerImageMap();
|
|
|
|
void TranslateEventCoords(const nsPoint& aPoint,
|
|
nsIntPoint& aResult);
|
|
|
|
PRBool GetAnchorHREFTargetAndNode(nsIURI** aHref, nsString& aTarget,
|
|
nsINode** aNode);
|
|
/**
|
|
* Computes the width of the string that fits into the available space
|
|
*
|
|
* @param in aLength total length of the string in PRUnichars
|
|
* @param in aMaxWidth width not to be exceeded
|
|
* @param out aMaxFit length of the string that fits within aMaxWidth
|
|
* in PRUnichars
|
|
* @return width of the string that fits within aMaxWidth
|
|
*/
|
|
nscoord MeasureString(const PRUnichar* aString,
|
|
PRInt32 aLength,
|
|
nscoord aMaxWidth,
|
|
PRUint32& aMaxFit,
|
|
nsIRenderingContext& aContext);
|
|
|
|
void DisplayAltText(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsString& aAltText,
|
|
const nsRect& aRect);
|
|
|
|
void PaintImage(nsIRenderingContext& aRenderingContext, nsPoint aPt,
|
|
const nsRect& aDirtyRect, imgIContainer* aImage);
|
|
|
|
protected:
|
|
friend class nsImageListener;
|
|
nsresult OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
|
|
nsresult OnDataAvailable(imgIRequest *aRequest,
|
|
gfxIImageFrame *aFrame,
|
|
const nsRect * rect);
|
|
nsresult OnStopDecode(imgIRequest *aRequest,
|
|
nsresult aStatus,
|
|
const PRUnichar *aStatusArg);
|
|
nsresult FrameChanged(imgIContainer *aContainer,
|
|
gfxIImageFrame *aNewframe,
|
|
nsRect *aDirtyRect);
|
|
|
|
private:
|
|
// random helpers
|
|
inline void SpecToURI(const nsAString& aSpec, nsIIOService *aIOService,
|
|
nsIURI **aURI);
|
|
|
|
inline void GetLoadGroup(nsPresContext *aPresContext,
|
|
nsILoadGroup **aLoadGroup);
|
|
nscoord GetContinuationOffset() const;
|
|
void GetDocumentCharacterSet(nsACString& aCharset) const;
|
|
|
|
/**
|
|
* Recalculate mIntrinsicSize from the image.
|
|
*
|
|
* @return whether aImage's size did _not_
|
|
* match our previous intrinsic size
|
|
*/
|
|
PRBool UpdateIntrinsicSize(imgIContainer* aImage);
|
|
|
|
/**
|
|
* This function will recalculate mTransform.
|
|
*/
|
|
void RecalculateTransform();
|
|
|
|
/**
|
|
* Helper functions to check whether the request or image container
|
|
* corresponds to a load we don't care about. Most of the decoder
|
|
* observer methods will bail early if these return true.
|
|
*/
|
|
PRBool IsPendingLoad(imgIRequest* aRequest) const;
|
|
PRBool IsPendingLoad(imgIContainer* aContainer) const;
|
|
|
|
/**
|
|
* Function to convert a dirty rect in the source image to a dirty
|
|
* rect for the image frame.
|
|
*/
|
|
nsRect SourceRectToDest(const nsRect & aRect);
|
|
|
|
nsImageMap* mImageMap;
|
|
|
|
nsCOMPtr<imgIDecoderObserver> mListener;
|
|
|
|
nsSize mComputedSize;
|
|
nsSize mIntrinsicSize;
|
|
nsTransform2D mTransform;
|
|
|
|
static nsIIOService* sIOService;
|
|
|
|
/* loading / broken image icon support */
|
|
|
|
// XXXbz this should be handled by the prescontext, I think; that
|
|
// way we would have a single iconload per mozilla session instead
|
|
// of one per document...
|
|
|
|
// LoadIcons: initiate the loading of the static icons used to show
|
|
// loading / broken images
|
|
nsresult LoadIcons(nsPresContext *aPresContext);
|
|
nsresult LoadIcon(const nsAString& aSpec, nsPresContext *aPresContext,
|
|
imgIRequest **aRequest);
|
|
|
|
// 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);
|
|
|
|
class IconLoad : public nsIObserver {
|
|
// private class that wraps the data and logic needed for
|
|
// broken image and loading image icons
|
|
public:
|
|
IconLoad(imgIDecoderObserver* aObserver);
|
|
|
|
void Shutdown()
|
|
{
|
|
// in case the pref service releases us later
|
|
if (mLoadingImage) {
|
|
mLoadingImage->Cancel(NS_ERROR_FAILURE);
|
|
mLoadingImage = nsnull;
|
|
}
|
|
if (mBrokenImage) {
|
|
mBrokenImage->Cancel(NS_ERROR_FAILURE);
|
|
mBrokenImage = nsnull;
|
|
}
|
|
}
|
|
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIOBSERVER
|
|
|
|
private:
|
|
void GetPrefs();
|
|
|
|
public:
|
|
nsCOMPtr<imgIRequest> mLoadingImage;
|
|
nsCOMPtr<imgIRequest> mBrokenImage;
|
|
nsCOMPtr<imgIDecoderObserver> mLoadObserver; // keeps the observer alive
|
|
PRUint8 mIconsLoaded;
|
|
PRPackedBool mPrefForceInlineAltText;
|
|
PRPackedBool mPrefShowPlaceholders;
|
|
};
|
|
|
|
public:
|
|
static IconLoad* gIconLoad; // singleton pattern: one LoadIcons instance is used
|
|
|
|
friend class nsDisplayImage;
|
|
};
|
|
|
|
#endif /* nsImageFrame_h___ */
|