785 lines
23 KiB
C++
785 lines
23 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 "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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#define BROKEN_IMAGE_URL "resource:/res/html/broken-image.gif"
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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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#define nsHTMLImageSuper nsHTMLTagContent
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class nsHTMLImage : public nsHTMLImageSuper {
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public:
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nsHTMLImage(nsIAtom* aTag);
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler) const;
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virtual nsresult 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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virtual void SetAttribute(nsIAtom* aAttribute, const nsString& aValue);
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virtual void MapAttributesInto(nsIStyleContext* aContext,
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nsIPresContext* aPresContext);
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protected:
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virtual ~nsHTMLImage();
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void SizeOfWithoutThis(nsISizeOfHandler* aHandler) const;
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virtual nsContentAttr AttributeToString(nsIAtom* aAttribute,
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nsHTMLValue& aValue,
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nsString& aResult) const;
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};
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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();
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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 GetCursorAt(nsIPresContext& aPresContext,
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const nsPoint& aPoint,
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nsIFrame** aFrame,
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PRInt32& aCursor);
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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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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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};
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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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}
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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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}
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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::LoadImage(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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// 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->LoadImage(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 LoadImage(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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LoadImage(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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LoadImage(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(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(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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LoadImage(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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} 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 = nscoord(imageSize.width * p2t);
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aDesiredSize.height = nscoord(imageSize.height * p2t);
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}
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}
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}
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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()
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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();
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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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nsHTMLBase::CreateViewForFrame(aPresContext, this, mStyleContext, PR_TRUE);
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// Setup url before starting the image load
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nsAutoString src;
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if (eContentAttr_HasValue == mContent->GetAttribute("SRC", src)) {
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mImageLoader.SetURL(src);
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}
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mImageLoader.GetDesiredSize(aPresContext, aReflowState, aDesiredSize);
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}
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NS_METHOD
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ImageFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect)
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{
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if ((0 == mRect.width) || (0 == mRect.height)) {
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// Do not render when given a zero area. This avoids some useless
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// scaling work while we wait for our image dimensions to arrive
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// asynchronously.
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return NS_OK;
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}
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const nsStyleDisplay* disp =
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(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
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if (disp->mVisible) {
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// First paint background and borders
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nsLeafFrame::Paint(aPresContext, aRenderingContext, aDirtyRect);
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// XXX when we don't have the image, draw the we-don't-have-an-image look
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nsIImage* image = mImageLoader.GetImage();
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if (nsnull == image) {
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// No image yet
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return NS_OK;
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}
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// Now render the image into our inner area (the area without the
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// borders and padding)
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nsRect inner;
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GetInnerArea(&aPresContext, inner);
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if (mImageLoader.GetLoadImageFailed()) {
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float p2t = aPresContext.GetPixelsToTwips();
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inner.width = nscoord(p2t * image->GetWidth());
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inner.height = nscoord(p2t * image->GetHeight());
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}
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aRenderingContext.DrawImage(image, inner);
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if (GetShowFrameBorders()) {
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nsIImageMap* map = GetImageMap();
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if (nsnull != map) {
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aRenderingContext.SetColor(NS_RGB(0, 0, 0));
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aRenderingContext.PushState();
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aRenderingContext.Translate(inner.x, inner.y);
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map->Draw(aPresContext, aRenderingContext);
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aRenderingContext.PopState();
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}
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}
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}
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return NS_OK;
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}
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nsIImageMap*
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ImageFrame::GetImageMap()
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{
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if (nsnull == mImageMap) {
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nsAutoString usemap;
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mContent->GetAttribute("usemap", usemap);
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if (0 == usemap.Length()) {
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return nsnull;
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}
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nsIDocument* doc = nsnull;
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mContent->GetDocument(doc);
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if (nsnull == doc) {
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return nsnull;
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}
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if (usemap.First() == '#') {
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usemap.Cut(0, 1);
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}
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nsIHTMLDocument* hdoc;
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nsresult rv = doc->QueryInterface(kIHTMLDocumentIID, (void**)&hdoc);
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NS_RELEASE(doc);
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if (NS_OK == rv) {
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nsIImageMap* map;
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rv = hdoc->GetImageMap(usemap, &map);
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NS_RELEASE(hdoc);
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if (NS_OK == rv) {
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mImageMap = map;
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}
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}
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}
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NS_IF_ADDREF(mImageMap);
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return mImageMap;
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}
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void
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ImageFrame::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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{
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nsILinkHandler* handler = nsnull;
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aPresContext.GetLinkHandler(&handler);
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if (nsnull != handler) {
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if (aClick) {
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handler->OnLinkClick(this, aURLSpec, aTargetSpec);
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}
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else {
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handler->OnOverLink(this, aURLSpec, aTargetSpec);
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}
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}
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}
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PRBool
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ImageFrame::IsServerImageMap()
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{
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nsAutoString ismap;
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return eContentAttr_HasValue == mContent->GetAttribute("ismap", ismap);
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}
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PRIntn
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ImageFrame::GetSuppress()
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{
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nsAutoString s;
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if (eContentAttr_HasValue == mContent->GetAttribute("ismap", s)) {
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if (s.EqualsIgnoreCase("true")) {
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return SUPPRESS;
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} else if (s.EqualsIgnoreCase("false")) {
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return DONT_SUPPRESS;
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}
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}
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return DEFAULT_SUPPRESS;
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}
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// XXX what should clicks on transparent pixels do?
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NS_METHOD
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ImageFrame::HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus)
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{
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nsIImageMap* map;
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aEventStatus = nsEventStatus_eIgnore;
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switch (aEvent->message) {
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case NS_MOUSE_LEFT_BUTTON_UP:
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case NS_MOUSE_MOVE:
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map = GetImageMap();
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if ((nsnull != map) || IsServerImageMap()) {
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nsIURL* docURL = nsnull;
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nsIDocument* doc = nsnull;
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mContent->GetDocument(doc);
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if (nsnull != doc) {
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docURL = doc->GetDocumentURL();
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NS_RELEASE(doc);
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}
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// Ask map if the x,y coordinates are in a clickable area
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float t2p = aPresContext.GetTwipsToPixels();
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nsAutoString absURL, target, altText;
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PRBool suppress;
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if (nsnull != map) {
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// Subtract out border and padding here so that we are looking
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// at the right coordinates. Hit detection against area tags
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// is done after the mouse wanders over the image, not over
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// the image's borders.
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nsRect inner;
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GetInnerArea(&aPresContext, inner);
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nscoord x = nscoord(t2p * (aEvent->point.x - inner.x));
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nscoord y = nscoord(t2p * (aEvent->point.y - inner.y));
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nsresult r = map->IsInside(x, y, docURL, absURL, target, altText,
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&suppress);
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NS_IF_RELEASE(docURL);
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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;/* XXX */
|
|
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]
|
|
nscoord x = nscoord(t2p * aEvent->point.x);
|
|
nscoord y = nscoord(t2p * aEvent->point.y);
|
|
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::GetCursorAt(nsIPresContext& aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsIFrame** aFrame,
|
|
PRInt32& aCursor)
|
|
{
|
|
// The default cursor is to have no cursor
|
|
aCursor = NS_STYLE_CURSOR_INHERIT;
|
|
|
|
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();
|
|
nscoord x = nscoord(t2p * (aPoint.x - inner.x));
|
|
nscoord y = nscoord(t2p * (aPoint.y - inner.y));
|
|
if (NS_OK == map->IsInside(x, y)) {
|
|
aCursor = NS_STYLE_CURSOR_HAND;
|
|
}
|
|
NS_RELEASE(map);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsHTMLImage::nsHTMLImage(nsIAtom* aTag)
|
|
: nsHTMLTagContent(aTag)
|
|
{
|
|
}
|
|
|
|
nsHTMLImage::~nsHTMLImage()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsHTMLImage::SizeOf(nsISizeOfHandler* aHandler) const
|
|
{
|
|
aHandler->Add(sizeof(*this));
|
|
nsHTMLImage::SizeOfWithoutThis(aHandler);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsHTMLImage::SizeOfWithoutThis(nsISizeOfHandler* aHandler) const
|
|
{
|
|
}
|
|
|
|
void
|
|
nsHTMLImage::SetAttribute(nsIAtom* aAttribute, const nsString& aString)
|
|
{
|
|
nsHTMLValue val;
|
|
if (aAttribute == nsHTMLAtoms::ismap) {
|
|
val.SetEmptyValue();
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::usemap) {
|
|
nsAutoString usemap(aString);
|
|
usemap.StripWhitespace();
|
|
val.SetStringValue(usemap);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::align) {
|
|
if (ParseAlignParam(aString, val)) {
|
|
// Reflect the attribute into the syle system
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else {
|
|
val.SetStringValue(aString);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::src) {
|
|
nsAutoString src(aString);
|
|
src.StripWhitespace();
|
|
val.SetStringValue(src);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::lowsrc) {
|
|
nsAutoString lowsrc(aString);
|
|
lowsrc.StripWhitespace();
|
|
val.SetStringValue(lowsrc);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::alt) {
|
|
val.SetStringValue(aString);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::suppress) {
|
|
PRIntn suppress = DEFAULT_SUPPRESS;
|
|
if (aString.EqualsIgnoreCase("true")) {
|
|
suppress = SUPPRESS;
|
|
}
|
|
else if (aString.EqualsIgnoreCase("false")) {
|
|
suppress = DONT_SUPPRESS;
|
|
}
|
|
val.SetIntValue(suppress, eHTMLUnit_Enumerated);
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else if (ParseImageProperty(aAttribute, aString, val)) {
|
|
nsHTMLTagContent::SetAttribute(aAttribute, val);
|
|
}
|
|
else {
|
|
// Use default attribute catching code
|
|
nsHTMLImageSuper::SetAttribute(aAttribute, aString);
|
|
}
|
|
}
|
|
|
|
nsContentAttr
|
|
nsHTMLImage::AttributeToString(nsIAtom* aAttribute,
|
|
nsHTMLValue& aValue,
|
|
nsString& aResult) const
|
|
{
|
|
nsContentAttr ca = eContentAttr_NotThere;
|
|
if (aAttribute == nsHTMLAtoms::align) {
|
|
if (eHTMLUnit_Enumerated == aValue.GetUnit()) {
|
|
AlignParamToString(aValue, aResult);
|
|
ca = eContentAttr_HasValue;
|
|
}
|
|
}
|
|
else if (aAttribute == nsHTMLAtoms::suppress) {
|
|
aResult.Truncate();
|
|
switch (aValue.GetIntValue()) {
|
|
case SUPPRESS: aResult.Append("true"); break;
|
|
case DONT_SUPPRESS: aResult.Append("false"); break;
|
|
case DEFAULT_SUPPRESS: break;
|
|
}
|
|
ca = eContentAttr_HasValue;
|
|
}
|
|
else if (ImagePropertyToString(aAttribute, aValue, aResult)) {
|
|
ca = eContentAttr_HasValue;
|
|
}
|
|
return ca;
|
|
}
|
|
|
|
void
|
|
nsHTMLImage::MapAttributesInto(nsIStyleContext* aContext,
|
|
nsIPresContext* aPresContext)
|
|
{
|
|
if (nsnull != mAttributes) {
|
|
nsHTMLValue value;
|
|
GetAttribute(nsHTMLAtoms::align, value);
|
|
if (value.GetUnit() == eHTMLUnit_Enumerated) {
|
|
PRUint8 align = value.GetIntValue();
|
|
nsStyleDisplay* display = (nsStyleDisplay*)
|
|
aContext->GetMutableStyleData(eStyleStruct_Display);
|
|
nsStyleText* text = (nsStyleText*)
|
|
aContext->GetMutableStyleData(eStyleStruct_Text);
|
|
nsStyleSpacing* spacing = (nsStyleSpacing*)
|
|
aContext->GetMutableStyleData(eStyleStruct_Spacing);
|
|
float p2t = aPresContext->GetPixelsToTwips();
|
|
nsStyleCoord three(nscoord(p2t*3));
|
|
switch (align) {
|
|
case NS_STYLE_TEXT_ALIGN_LEFT:
|
|
display->mFloats = NS_STYLE_FLOAT_LEFT;
|
|
spacing->mMargin.SetLeft(three);
|
|
spacing->mMargin.SetRight(three);
|
|
break;
|
|
case NS_STYLE_TEXT_ALIGN_RIGHT:
|
|
display->mFloats = NS_STYLE_FLOAT_RIGHT;
|
|
spacing->mMargin.SetLeft(three);
|
|
spacing->mMargin.SetRight(three);
|
|
break;
|
|
default:
|
|
text->mVerticalAlign.SetIntValue(align, eStyleUnit_Enumerated);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
MapImagePropertiesInto(aContext, aPresContext);
|
|
MapImageBorderInto(aContext, aPresContext, nsnull);
|
|
}
|
|
|
|
nsresult
|
|
nsHTMLImage::CreateFrame(nsIPresContext* aPresContext,
|
|
nsIFrame* aParentFrame,
|
|
nsIStyleContext* aStyleContext,
|
|
nsIFrame*& aResult)
|
|
{
|
|
ImageFrame* frame = new ImageFrame(this, aParentFrame);
|
|
if (nsnull == frame) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aResult = frame;
|
|
frame->SetStyleContext(aPresContext, aStyleContext);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
NS_NewHTMLImage(nsIHTMLContent** aInstancePtrResult,
|
|
nsIAtom* aTag)
|
|
{
|
|
NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
|
|
if (nsnull == aInstancePtrResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsIHTMLContent* img = new nsHTMLImage(aTag);
|
|
if (nsnull == img) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
return img->QueryInterface(kIHTMLContentIID, (void **) aInstancePtrResult);
|
|
}
|