mirror of
https://github.com/mozilla/gecko-dev.git
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929 lines
28 KiB
C++
929 lines
28 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsHTMLParts.h"
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#include "nsHTMLImage.h"
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#include "nsHTMLTagContent.h"
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#include "nsString.h"
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#include "nsLeafFrame.h"
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#include "nsIPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsIFrameImageLoader.h"
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#include "nsIPresShell.h"
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#include "nsHTMLIIDs.h"
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#include "nsIImage.h"
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#include "nsIWidget.h"
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#include "nsHTMLAtoms.h"
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#include "nsIHTMLAttributes.h"
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#include "nsIDocument.h"
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#include "nsIHTMLDocument.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIImageMap.h"
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#include "nsILinkHandler.h"
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#include "nsIURL.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsCSSLayout.h"
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#include "nsHTMLBase.h"
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#include "prprf.h"
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#include "nsISizeOfHandler.h"
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#include "nsIFontMetrics.h"
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#include "nsCSSRendering.h"
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#include "nsIDOMHTMLImageElement.h"
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#define BROKEN_IMAGE_URL "resource:/res/html/broken-image.gif"
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#define XP_IS_SPACE(_ch) \
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(((_ch) == ' ') || ((_ch) == '\t') || ((_ch) == '\n'))
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// XXX image frame layout can be 100% decoupled from the content
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// object; all it needs are attributes to work properly
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static NS_DEFINE_IID(kIHTMLDocumentIID, NS_IHTMLDOCUMENT_IID);
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#if 0
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#define nsHTMLImageSuper nsHTMLTagContent
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class nsHTMLImage : public nsHTMLImageSuper, public nsIDOMHTMLImageElement {
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public:
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nsHTMLImage(nsIAtom* aTag);
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NS_DECL_ISUPPORTS
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler) const;
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NS_IMETHOD CreateFrame(nsIPresContext* aPresContext,
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nsIFrame* aParentFrame,
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nsIStyleContext* aStyleContext,
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nsIFrame*& aResult);
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NS_IMETHOD SetAttribute(nsIAtom* aAttribute, const nsString& aValue,
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PRBool aNotify);
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NS_IMETHOD MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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NS_IMETHOD AttributeToString(nsIAtom* aAttribute,
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nsHTMLValue& aValue,
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nsString& aResult) const;
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NS_FORWARD_IDOMNODE(nsHTMLImageSuper::)
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NS_FORWARD_IDOMELEMENT(nsHTMLImageSuper::)
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NS_FORWARD_IDOMHTMLELEMENT(nsHTMLImageSuper::)
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NS_DECL_IDOMHTMLIMAGEELEMENT
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NS_IMETHOD GetScriptObject(nsIScriptContext *aContext, void** aScriptObject);
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protected:
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virtual ~nsHTMLImage();
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void SizeOfWithoutThis(nsISizeOfHandler* aHandler) const;
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void TriggerReflow();
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};
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#endif
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#define ImageFrameSuper nsLeafFrame
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class ImageFrame : public ImageFrameSuper {
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public:
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ImageFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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NS_IMETHOD DeleteFrame(nsIPresContext& aPresContext);
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler) const;
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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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NS_METHOD HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus);
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NS_IMETHOD GetCursorAndContentAt(nsIPresContext& aPresContext,
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const nsPoint& aPoint,
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nsIFrame** aFrame,
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nsIContent** aContent,
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PRInt32& aCursor);
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NS_IMETHOD ContentChanged(nsIPresShell* aShell,
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nsIPresContext* aPresContext,
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nsIContent* aChild,
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nsISupports* aSubContent);
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protected:
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virtual ~ImageFrame();
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void SizeOfWithoutThis(nsISizeOfHandler* aHandler) const;
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virtual void GetDesiredSize(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nsReflowMetrics& aDesiredSize);
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nsIImageMap* GetImageMap();
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nsHTMLImageLoader mImageLoader;
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nsIImageMap* mImageMap;
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PRBool mSizeFrozen;
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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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PRIntn GetSuppress();
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nscoord MeasureString(nsIFontMetrics* aFontMetrics,
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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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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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};
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// Value's for mSuppress
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#define SUPPRESS_UNSET 0
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#define DONT_SUPPRESS 1
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#define SUPPRESS 2
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#define DEFAULT_SUPPRESS 3
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// Default alignment value (so we can tell an unset value from a set value)
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#define ALIGN_UNSET PRUint8(-1)
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//----------------------------------------------------------------------
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nsHTMLImageLoader::nsHTMLImageLoader()
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{
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mImageLoader = nsnull;
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mLoadImageFailed = PR_FALSE;
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mLoadBrokenImageFailed = PR_FALSE;
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mURLSpec = nsnull;
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mBaseHREF = nsnull;
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}
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nsHTMLImageLoader::~nsHTMLImageLoader()
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{
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NS_IF_RELEASE(mImageLoader);
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if (nsnull != mURLSpec) {
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delete mURLSpec;
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}
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if (nsnull != mBaseHREF) {
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delete mBaseHREF;
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}
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}
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void
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nsHTMLImageLoader::SizeOf(nsISizeOfHandler* aHandler) const
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{
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aHandler->Add(sizeof(*this));
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if (!aHandler->HaveSeen(mURLSpec)) {
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mURLSpec->SizeOf(aHandler);
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}
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if (!aHandler->HaveSeen(mImageLoader)) {
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mImageLoader->SizeOf(aHandler);
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}
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}
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nsIImage*
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nsHTMLImageLoader::GetImage()
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{
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nsIImage* image = nsnull;
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if (nsnull != mImageLoader) {
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mImageLoader->GetImage(image);
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}
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return image;
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}
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nsresult
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nsHTMLImageLoader::SetURL(const nsString& aURLSpec)
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{
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if (nsnull != mURLSpec) {
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delete mURLSpec;
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}
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mURLSpec = new nsString(aURLSpec);
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if (nsnull == mURLSpec) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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nsHTMLImageLoader::SetBaseHREF(const nsString& aBaseHREF)
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{
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if (nsnull != mBaseHREF) {
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delete mBaseHREF;
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}
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mBaseHREF = new nsString(aBaseHREF);
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if (nsnull == mBaseHREF) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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nsHTMLImageLoader::StartLoadImage(nsIPresContext* aPresContext,
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nsIFrame* aForFrame,
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PRBool aNeedSizeUpdate,
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PRIntn& aLoadStatus)
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{
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aLoadStatus = NS_IMAGE_LOAD_STATUS_NONE;
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// Get absolute url the first time through
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nsresult rv;
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nsAutoString src;
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if (mLoadImageFailed || (nsnull == mURLSpec)) {
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src.Append(BROKEN_IMAGE_URL);
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} else {
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nsAutoString baseURL;
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if (nsnull != mBaseHREF) {
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baseURL = *mBaseHREF;
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}
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// Get documentURL
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nsIPresShell* shell;
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shell = aPresContext->GetShell();
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nsIDocument* doc = shell->GetDocument();
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nsIURL* docURL = doc->GetDocumentURL();
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// Create an absolute URL
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nsresult rv = NS_MakeAbsoluteURL(docURL, baseURL, *mURLSpec, src);
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// Release references
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NS_RELEASE(shell);
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NS_RELEASE(docURL);
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NS_RELEASE(doc);
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if (NS_OK != rv) {
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return rv;
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}
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}
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if (nsnull == mImageLoader) {
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// Start image loading. Note that we don't specify a background color
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// so transparent images are always rendered using a transparency mask
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rv = aPresContext->StartLoadImage(src, nsnull, aForFrame, aNeedSizeUpdate,
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mImageLoader);
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if (NS_OK != rv) {
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return rv;
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}
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}
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// Examine current image load status
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mImageLoader->GetImageLoadStatus(aLoadStatus);
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if (0 != (aLoadStatus & NS_IMAGE_LOAD_STATUS_ERROR)) {
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NS_RELEASE(mImageLoader);
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if (mLoadImageFailed) {
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// We are doomed. Loading the broken image has just failed.
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mLoadBrokenImageFailed = PR_TRUE;
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}
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else {
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// Try again, this time using the broke-image url
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mLoadImageFailed = PR_TRUE;
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return StartLoadImage(aPresContext, aForFrame, aNeedSizeUpdate, aLoadStatus);
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}
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}
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return NS_OK;
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}
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void
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nsHTMLImageLoader::GetDesiredSize(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nsReflowMetrics& aDesiredSize)
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{
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nsSize styleSize;
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PRIntn ss = nsCSSLayout::GetStyleSize(aPresContext, aReflowState, styleSize);
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PRIntn loadStatus;
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if (0 != ss) {
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if (NS_SIZE_HAS_BOTH == ss) {
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StartLoadImage(aPresContext, aReflowState.frame, PR_FALSE, loadStatus);
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aDesiredSize.width = styleSize.width;
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aDesiredSize.height = styleSize.height;
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}
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else {
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// Preserve aspect ratio of image with unbound dimension.
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StartLoadImage(aPresContext, aReflowState.frame, PR_TRUE, loadStatus);
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if ((0 == (loadStatus & NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE)) ||
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(nsnull == mImageLoader)) {
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// Provide a dummy size for now; later on when the image size
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// shows up we will reflow to the new size.
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aDesiredSize.width = 1;
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aDesiredSize.height = 1;
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}
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else {
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float p2t = aPresContext->GetPixelsToTwips();
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nsSize imageSize;
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mImageLoader->GetSize(imageSize);
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float imageWidth = imageSize.width * p2t;
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float imageHeight = imageSize.height * p2t;
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if (0.0f != imageHeight) {
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if (0 != (ss & NS_SIZE_HAS_WIDTH)) {
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// We have a width, and an auto height. Compute height
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// from width.
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aDesiredSize.width = styleSize.width;
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aDesiredSize.height =
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(nscoord)NSToIntRound(styleSize.width * imageHeight / imageWidth);
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}
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else {
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// We have a height and an auto width. Compute width from
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// height.
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aDesiredSize.height = styleSize.height;
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aDesiredSize.width =
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(nscoord)NSToIntRound(styleSize.height * imageWidth / imageHeight);
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}
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}
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else {
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// Screwy image
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aDesiredSize.width = 1;
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aDesiredSize.height = 1;
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}
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}
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}
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}
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else {
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StartLoadImage(aPresContext, aReflowState.frame, PR_TRUE, loadStatus);
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if ((0 == (loadStatus & NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE)) ||
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(nsnull == mImageLoader)) {
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// Provide a dummy size for now; later on when the image size
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// shows up we will reflow to the new size.
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aDesiredSize.width = 1;
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aDesiredSize.height = 1;
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printf ("in image loader, dummy size of 1 returned\n");
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} else {
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float p2t = aPresContext->GetPixelsToTwips();
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nsSize imageSize;
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mImageLoader->GetSize(imageSize);
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aDesiredSize.width = NSIntPixelsToTwips(imageSize.width, p2t);
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aDesiredSize.height = NSIntPixelsToTwips(imageSize.height, p2t);
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printf ("in image loader, real size of %d returned\n", aDesiredSize.width);
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}
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}
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}
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//----------------------------------------------------------------------
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nsresult
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NS_NewImageFrame(nsIContent* aContent,
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nsIFrame* aParentFrame,
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nsIFrame*& aResult)
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{
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ImageFrame* frame = new ImageFrame(aContent, aParentFrame);
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if (nsnull == frame) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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aResult = frame;
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return NS_OK;
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}
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ImageFrame::ImageFrame(nsIContent* aContent, nsIFrame* aParentFrame)
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: nsLeafFrame(aContent, aParentFrame)
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{
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}
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ImageFrame::~ImageFrame()
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{
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}
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NS_METHOD
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ImageFrame::DeleteFrame(nsIPresContext& aPresContext)
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{
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NS_IF_RELEASE(mImageMap);
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// Release image loader first so that it's refcnt can go to zero
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mImageLoader.DestroyLoader();
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return nsLeafFrame::DeleteFrame(aPresContext);
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}
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NS_IMETHODIMP
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ImageFrame::SizeOf(nsISizeOfHandler* aHandler) const
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{
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aHandler->Add(sizeof(*this));
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ImageFrame::SizeOfWithoutThis(aHandler);
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return NS_OK;
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}
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void
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ImageFrame::SizeOfWithoutThis(nsISizeOfHandler* aHandler) const
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{
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ImageFrameSuper::SizeOfWithoutThis(aHandler);
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mImageLoader.SizeOf(aHandler);
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if (!aHandler->HaveSeen(mImageMap)) {
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mImageMap->SizeOf(aHandler);
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}
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}
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void
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ImageFrame::GetDesiredSize(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nsReflowMetrics& aDesiredSize)
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{
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if (mSizeFrozen) {
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aDesiredSize.width = mRect.width;
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aDesiredSize.height = mRect.height;
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}
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else {
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// XXX Don't create a view, because we want whatever is below the image
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// to show through while the image is loading; Likewise for transparent
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// images and broken images
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//
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// What we really want to do is to create a view, and indicate that the
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// view has a transparent content area. Do this while it's loading,
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// and then when it's fully loaded mark the view as opaque if the
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// image is opaque.
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//
|
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// We can't use that approach yet, because currently the compositor doesn't
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// support transparent views...
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#if 0
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nsHTMLBase::CreateViewForFrame(aPresContext, this, mStyleContext, PR_TRUE);
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#endif
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// Setup url before starting the image load
|
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nsAutoString src, base;
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if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute("SRC", src)) {
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mImageLoader.SetURL(src);
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if (NS_CONTENT_ATTR_HAS_VALUE ==
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mContent->GetAttribute(NS_HTML_BASE_HREF, base)) {
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mImageLoader.SetBaseHREF(base);
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}
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}
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mImageLoader.GetDesiredSize(aPresContext, aReflowState, aDesiredSize);
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}
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}
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// Computes the width of the specified string. aMaxWidth specifies the maximum
|
|
// width available. Once this limit is reached no more characters are measured.
|
|
// The number of characters that fit within the maximum width are returned in
|
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// aMaxFit
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nscoord
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|
ImageFrame::MeasureString(nsIFontMetrics* aFontMetrics,
|
|
const PRUnichar* aString,
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PRInt32 aLength,
|
|
nscoord aMaxWidth,
|
|
PRUint32& aMaxFit)
|
|
{
|
|
nscoord totalWidth = 0;
|
|
nscoord spaceWidth;
|
|
aFontMetrics->GetWidth(' ', spaceWidth);
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|
|
|
aMaxFit = 0;
|
|
while (aLength > 0) {
|
|
// Find the next place we can line break
|
|
PRUint32 len = aLength;
|
|
PRBool trailingSpace = PR_FALSE;
|
|
for (PRInt32 i = 0; i < aLength; i++) {
|
|
if (XP_IS_SPACE(aString[i]) && (i > 0)) {
|
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len = i; // don't include the space when measuring
|
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trailingSpace = PR_TRUE;
|
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break;
|
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}
|
|
}
|
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|
|
// Measure this chunk of text, and see if it fits
|
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nscoord width;
|
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aFontMetrics->GetWidth(aString, len, width);
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PRBool fits = (totalWidth + width) <= aMaxWidth;
|
|
|
|
// If it fits on the line, or it's the first word we've processed then
|
|
// include it
|
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if (fits || (0 == totalWidth)) {
|
|
// New piece fits
|
|
totalWidth += width;
|
|
|
|
// If there's a trailing space then see if it fits as well
|
|
if (trailingSpace) {
|
|
if ((totalWidth + spaceWidth) <= aMaxWidth) {
|
|
totalWidth += spaceWidth;
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|
} else {
|
|
// Space won't fit. Leave it at the end but don't include it in
|
|
// the width
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|
fits = PR_FALSE;
|
|
}
|
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|
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len++;
|
|
}
|
|
|
|
aMaxFit += len;
|
|
aString += len;
|
|
aLength -= len;
|
|
}
|
|
|
|
if (!fits) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return totalWidth;
|
|
}
|
|
|
|
// Formats the alt-text to fit within the specified rectangle. Breaks lines
|
|
// between words if a word would extend past the edge of the rectangle
|
|
void
|
|
ImageFrame::DisplayAltText(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsString& aAltText,
|
|
const nsRect& aRect)
|
|
{
|
|
// Clip so we don't render outside of the rect.
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.SetClipRect(aRect, nsClipCombine_kIntersect);
|
|
|
|
const nsStyleColor* color =
|
|
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
|
|
const nsStyleFont* font =
|
|
(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
|
|
|
|
// Set font and color
|
|
aRenderingContext.SetColor(color->mColor);
|
|
aRenderingContext.SetFont(font->mFont);
|
|
|
|
// Format the text to display within the formatting rect
|
|
nsIFontMetrics* fm = aRenderingContext.GetFontMetrics();
|
|
|
|
nscoord maxDescent, height;
|
|
fm->GetMaxDescent(maxDescent);
|
|
fm->GetHeight(height);
|
|
|
|
// XXX It would be nice if there was a way to have the font metrics tell
|
|
// use where to break the text given a maximum width. At a minimum we need
|
|
// to be able to get the break character...
|
|
const PRUnichar* str = aAltText.GetUnicode();
|
|
PRInt32 strLen = aAltText.Length();
|
|
nscoord y = aRect.y;
|
|
while ((strLen > 0) && ((y + maxDescent) < aRect.YMost())) {
|
|
// Determine how much of the text to display on this line
|
|
PRUint32 maxFit; // number of characters that fit
|
|
nscoord width = MeasureString(fm, str, strLen, aRect.width, maxFit);
|
|
|
|
// Display the text
|
|
aRenderingContext.DrawString(str, maxFit, aRect.x, y, 0);
|
|
|
|
// Move to the next line
|
|
str += maxFit;
|
|
strLen -= maxFit;
|
|
y += height;
|
|
}
|
|
|
|
NS_RELEASE(fm);
|
|
aRenderingContext.PopState();
|
|
}
|
|
|
|
struct nsRecessedBorder : public nsStyleSpacing {
|
|
nsRecessedBorder(nscoord aBorderWidth)
|
|
: nsStyleSpacing()
|
|
{
|
|
nsStyleCoord styleCoord(aBorderWidth);
|
|
|
|
mBorder.SetLeft(styleCoord);
|
|
mBorder.SetTop(styleCoord);
|
|
mBorder.SetRight(styleCoord);
|
|
mBorder.SetBottom(styleCoord);
|
|
mBorderStyle[0] = NS_STYLE_BORDER_STYLE_INSET;
|
|
mBorderStyle[1] = NS_STYLE_BORDER_STYLE_INSET;
|
|
mBorderStyle[2] = NS_STYLE_BORDER_STYLE_INSET;
|
|
mBorderStyle[3] = NS_STYLE_BORDER_STYLE_INSET;
|
|
mBorderColor[0] = 0;
|
|
mBorderColor[1] = 0;
|
|
mBorderColor[2] = 0;
|
|
mBorderColor[3] = 0;
|
|
mHasCachedMargin = mHasCachedPadding = mHasCachedBorder = PR_FALSE;
|
|
}
|
|
};
|
|
|
|
NS_METHOD
|
|
ImageFrame::Paint(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
if ((0 == mRect.width) || (0 == mRect.height)) {
|
|
// Do not render when given a zero area. This avoids some useless
|
|
// scaling work while we wait for our image dimensions to arrive
|
|
// asynchronously.
|
|
return NS_OK;
|
|
}
|
|
|
|
const nsStyleDisplay* disp =
|
|
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
|
|
|
|
if (disp->mVisible) {
|
|
// First paint background and borders
|
|
nsLeafFrame::Paint(aPresContext, aRenderingContext, aDirtyRect);
|
|
|
|
nsIImage* image = mImageLoader.GetImage();
|
|
if (nsnull == image) {
|
|
// No image yet. Draw the icon that indicates we're loading, and display
|
|
// the alt-text
|
|
nsAutoString altText;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute("ALT", altText)) {
|
|
// Display a recessed one-pixel border in the inner area
|
|
nsRect inner;
|
|
GetInnerArea(&aPresContext, inner);
|
|
|
|
float p2t = aPresContext.GetPixelsToTwips();
|
|
nsRecessedBorder recessedBorder(NSIntPixelsToTwips(1, p2t));
|
|
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this, inner,
|
|
inner, recessedBorder, 0);
|
|
inner.Deflate(NSIntPixelsToTwips(1, p2t), NSIntPixelsToTwips(1, p2t));
|
|
|
|
// Leave a 8 pixel left/right padding, and a 5 pixel top/bottom padding
|
|
inner.Deflate(NSIntPixelsToTwips(8, p2t), NSIntPixelsToTwips(5, p2t));
|
|
|
|
// If there's room, then display the alt-text
|
|
if (!inner.IsEmpty()) {
|
|
DisplayAltText(aPresContext, aRenderingContext, altText, inner);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Now render the image into our inner area (the area without the
|
|
// borders and padding)
|
|
nsRect inner;
|
|
GetInnerArea(&aPresContext, inner);
|
|
if (mImageLoader.GetLoadImageFailed()) {
|
|
float p2t = aPresContext.GetPixelsToTwips();
|
|
inner.width = NSIntPixelsToTwips(image->GetWidth(), p2t);
|
|
inner.height = NSIntPixelsToTwips(image->GetHeight(), p2t);
|
|
}
|
|
aRenderingContext.DrawImage(image, inner);
|
|
|
|
if (GetShowFrameBorders()) {
|
|
nsIImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.Translate(inner.x, inner.y);
|
|
map->Draw(aPresContext, aRenderingContext);
|
|
aRenderingContext.PopState();
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIImageMap*
|
|
ImageFrame::GetImageMap()
|
|
{
|
|
if (nsnull == mImageMap) {
|
|
nsAutoString usemap;
|
|
mContent->GetAttribute("usemap", usemap);
|
|
if (0 == usemap.Length()) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsIDocument* doc = nsnull;
|
|
mContent->GetDocument(doc);
|
|
if (nsnull == doc) {
|
|
return nsnull;
|
|
}
|
|
|
|
if (usemap.First() == '#') {
|
|
usemap.Cut(0, 1);
|
|
}
|
|
nsIHTMLDocument* hdoc;
|
|
nsresult rv = doc->QueryInterface(kIHTMLDocumentIID, (void**)&hdoc);
|
|
NS_RELEASE(doc);
|
|
if (NS_OK == rv) {
|
|
nsIImageMap* map;
|
|
rv = hdoc->GetImageMap(usemap, &map);
|
|
NS_RELEASE(hdoc);
|
|
if (NS_OK == rv) {
|
|
mImageMap = map;
|
|
}
|
|
}
|
|
}
|
|
NS_IF_ADDREF(mImageMap);
|
|
return mImageMap;
|
|
}
|
|
|
|
void
|
|
ImageFrame::TriggerLink(nsIPresContext& aPresContext,
|
|
const nsString& aURLSpec,
|
|
const nsString& aTargetSpec,
|
|
PRBool aClick)
|
|
{
|
|
nsILinkHandler* handler = nsnull;
|
|
aPresContext.GetLinkHandler(&handler);
|
|
if (nsnull != handler) {
|
|
if (aClick) {
|
|
handler->OnLinkClick(this, aURLSpec, aTargetSpec);
|
|
}
|
|
else {
|
|
handler->OnOverLink(this, aURLSpec, aTargetSpec);
|
|
}
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
ImageFrame::IsServerImageMap()
|
|
{
|
|
nsAutoString ismap;
|
|
return NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute("ismap", ismap);
|
|
}
|
|
|
|
PRIntn
|
|
ImageFrame::GetSuppress()
|
|
{
|
|
nsAutoString s;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute("suppress", s)) {
|
|
if (s.EqualsIgnoreCase("true")) {
|
|
return SUPPRESS;
|
|
} else if (s.EqualsIgnoreCase("false")) {
|
|
return DONT_SUPPRESS;
|
|
}
|
|
}
|
|
return DEFAULT_SUPPRESS;
|
|
}
|
|
|
|
// XXX what should clicks on transparent pixels do?
|
|
NS_METHOD
|
|
ImageFrame::HandleEvent(nsIPresContext& aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus& aEventStatus)
|
|
{
|
|
nsIImageMap* map;
|
|
aEventStatus = nsEventStatus_eIgnore;
|
|
|
|
switch (aEvent->message) {
|
|
case NS_MOUSE_LEFT_BUTTON_UP:
|
|
case NS_MOUSE_MOVE:
|
|
map = GetImageMap();
|
|
if ((nsnull != map) || IsServerImageMap()) {
|
|
nsIURL* docURL = nsnull;
|
|
nsIDocument* doc = nsnull;
|
|
mContent->GetDocument(doc);
|
|
if (nsnull != doc) {
|
|
docURL = doc->GetDocumentURL();
|
|
NS_RELEASE(doc);
|
|
}
|
|
|
|
// Ask map if the x,y coordinates are in a clickable area
|
|
float t2p = aPresContext.GetTwipsToPixels();
|
|
nsAutoString absURL, target, altText;
|
|
PRBool suppress;
|
|
if (nsnull != map) {
|
|
// Subtract out border and padding here so that we are looking
|
|
// at the right coordinates. Hit detection against area tags
|
|
// is done after the mouse wanders over the image, not over
|
|
// the image's borders.
|
|
nsRect inner;
|
|
GetInnerArea(&aPresContext, inner);
|
|
PRInt32 x = NSTwipsToIntPixels((aEvent->point.x - inner.x), t2p);
|
|
PRInt32 y = NSTwipsToIntPixels((aEvent->point.y - inner.y), t2p);
|
|
nsresult r = map->IsInside(x, y, docURL, absURL, target, altText,
|
|
&suppress);
|
|
NS_IF_RELEASE(docURL);
|
|
NS_RELEASE(map);
|
|
if (NS_OK == r) {
|
|
// We hit a clickable area. Time to go somewhere...
|
|
PRBool clicked = PR_FALSE;
|
|
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
|
|
aEventStatus = nsEventStatus_eConsumeNoDefault;
|
|
clicked = PR_TRUE;
|
|
}
|
|
TriggerLink(aPresContext, absURL, target, clicked);
|
|
}
|
|
}
|
|
else {
|
|
suppress = GetSuppress();
|
|
nsAutoString baseURL;
|
|
mContent->GetAttribute(NS_HTML_BASE_HREF, baseURL);
|
|
nsAutoString src;
|
|
mContent->GetAttribute("src", src);
|
|
NS_MakeAbsoluteURL(docURL, baseURL, src, absURL);
|
|
|
|
// Note: We don't subtract out the border/padding here to remain
|
|
// compatible with navigator. [ick]
|
|
PRInt32 x = NSTwipsToIntPixels(aEvent->point.x, t2p);
|
|
PRInt32 y = NSTwipsToIntPixels(aEvent->point.y, t2p);
|
|
char cbuf[50];
|
|
PR_snprintf(cbuf, sizeof(cbuf), "?%d,%d", x, y);
|
|
absURL.Append(cbuf);
|
|
PRBool clicked = PR_FALSE;
|
|
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
|
|
aEventStatus = nsEventStatus_eConsumeNoDefault;
|
|
clicked = PR_TRUE;
|
|
}
|
|
TriggerLink(aPresContext, absURL, target, clicked);
|
|
}
|
|
break;
|
|
}
|
|
// FALL THROUGH
|
|
|
|
default:
|
|
// Let default event handler deal with it
|
|
return nsLeafFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_METHOD
|
|
ImageFrame::GetCursorAndContentAt(nsIPresContext& aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsIFrame** aFrame,
|
|
nsIContent** aContent,
|
|
PRInt32& aCursor)
|
|
{
|
|
// The default cursor is to have no cursor
|
|
aCursor = NS_STYLE_CURSOR_INHERIT;
|
|
*aContent = mContent;
|
|
|
|
const nsStyleColor* styleColor = (const nsStyleColor*)
|
|
mStyleContext->GetStyleData(eStyleStruct_Color);
|
|
if (styleColor->mCursor != NS_STYLE_CURSOR_INHERIT) {
|
|
// If we have a particular cursor, use it
|
|
*aFrame = this;
|
|
aCursor = (PRInt32) styleColor->mCursor;
|
|
}
|
|
|
|
nsIImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
nsRect inner;
|
|
GetInnerArea(&aPresContext, inner);
|
|
aCursor = NS_STYLE_CURSOR_DEFAULT;
|
|
float t2p = aPresContext.GetTwipsToPixels();
|
|
PRInt32 x = NSTwipsToIntPixels((aPoint.x - inner.x), t2p);
|
|
PRInt32 y = NSTwipsToIntPixels((aPoint.y - inner.y), t2p);
|
|
if (NS_OK == map->IsInside(x, y)) {
|
|
aCursor = NS_STYLE_CURSOR_HAND;
|
|
}
|
|
NS_RELEASE(map);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ImageFrame::ContentChanged(nsIPresShell* aShell,
|
|
nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
nsISupports* aSubContent)
|
|
{
|
|
// See if the src attribute changed; if it did then trigger a redraw
|
|
// by firing up a new image load request. Otherwise let our base
|
|
// class handle the content-changed request.
|
|
nsAutoString oldSRC;
|
|
mImageLoader.GetURL(oldSRC);
|
|
|
|
// Get src attribute's value and construct a new absolute url from it
|
|
nsAutoString newSRC;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute("SRC", newSRC)) {
|
|
if (!oldSRC.Equals(newSRC)) {
|
|
mSizeFrozen = PR_TRUE;
|
|
|
|
#ifdef NS_DEBUG
|
|
char oldcbuf[100], newcbuf[100];
|
|
oldSRC.ToCString(oldcbuf, sizeof(oldcbuf));
|
|
newSRC.ToCString(newcbuf, sizeof(newcbuf));
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("ImageFrame::ContentChanged: new image source; old='%s' new='%s'",
|
|
oldcbuf, newcbuf));
|
|
#endif
|
|
|
|
// Get rid of old image loader and start a new image load going
|
|
mImageLoader.DestroyLoader();
|
|
|
|
// Fire up a new image load request
|
|
PRIntn loadStatus;
|
|
mImageLoader.SetURL(newSRC);
|
|
mImageLoader.StartLoadImage(aPresContext, this, PR_FALSE, loadStatus);
|
|
|
|
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
|
|
("ImageFrame::ContentChanged: loadImage status=%x",
|
|
loadStatus));
|
|
|
|
// If the image is already ready then we need to trigger a
|
|
// redraw because the image loader won't.
|
|
if (loadStatus & NS_IMAGE_LOAD_STATUS_IMAGE_READY) {
|
|
// XXX Stuff this into a method on nsIPresShell/Context
|
|
nsRect bounds;
|
|
nsPoint offset;
|
|
nsIView* view;
|
|
GetOffsetFromView(offset, view);
|
|
nsIViewManager* vm;
|
|
view->GetViewManager(vm);
|
|
bounds.x = offset.x;
|
|
bounds.y = offset.y;
|
|
bounds.width = mRect.width;
|
|
bounds.height = mRect.height;
|
|
vm->UpdateView(view, bounds, 0);
|
|
NS_RELEASE(vm);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return ImageFrameSuper::ContentChanged(aShell, aPresContext, aChild,
|
|
aSubContent);
|
|
}
|