зеркало из https://github.com/mozilla/gecko-dev.git
1133 строки
35 KiB
C++
1133 строки
35 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "nsHTMLParts.h"
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#include "nsCOMPtr.h"
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#include "nsImageFrame.h"
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#include "nsString.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 "nsImageMap.h"
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#include "nsILinkHandler.h"
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#include "nsIURL.h"
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#include "nsIIOService.h"
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#include "nsIURL.h"
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#include "nsIServiceManager.h"
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#include "nsNetUtil.h"
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static NS_DEFINE_CID(kIOServiceCID, NS_IOSERVICE_CID);
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsHTMLContainerFrame.h"
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#include "prprf.h"
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#include "nsIFontMetrics.h"
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#include "nsCSSRendering.h"
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#include "nsIDOMHTMLAnchorElement.h"
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#include "nsIDOMHTMLImageElement.h"
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#include "nsIDeviceContext.h"
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#include "nsINameSpaceManager.h"
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#include "nsTextFragment.h"
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#include "nsIDOMHTMLMapElement.h"
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#include "nsIStyleSet.h"
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#include "nsLayoutAtoms.h"
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#include "nsISizeOfHandler.h"
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#include "nsIFrameManager.h"
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#include "nsIScriptSecurityManager.h"
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#ifdef DEBUG
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#undef NOISY_IMAGE_LOADING
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#else
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#undef NOISY_IMAGE_LOADING
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#endif
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static NS_DEFINE_IID(kIHTMLDocumentIID, NS_IHTMLDOCUMENT_IID);
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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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nsresult
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NS_NewImageFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsImageFrame* it = new (aPresShell) nsImageFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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nsImageFrame::nsImageFrame() :
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mLowSrcImageLoader(nsnull)
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{
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}
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nsImageFrame::~nsImageFrame()
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{
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if (mLowSrcImageLoader != nsnull) {
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delete mLowSrcImageLoader;
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}
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}
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NS_METHOD
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nsImageFrame::Destroy(nsIPresContext* aPresContext)
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{
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// Tell our image map, if there is one, to clean up
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// This causes the nsImageMap to unregister itself as
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// a DOM listener.
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if(mImageMap) {
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mImageMap->Destroy();
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NS_RELEASE(mImageMap);
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}
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// Release image loader first so that it's refcnt can go to zero
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mImageLoader.StopAllLoadImages(aPresContext);
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if (mLowSrcImageLoader != nsnull) {
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mLowSrcImageLoader->StopAllLoadImages(aPresContext);
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}
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return nsLeafFrame::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsImageFrame::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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nsresult rv = nsLeafFrame::Init(aPresContext, aContent, aParent,
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aContext, aPrevInFlow);
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// See if we have a SRC attribute
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nsAutoString src;
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nsresult ca;
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ca = mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::src, src);
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if ((NS_CONTENT_ATTR_HAS_VALUE != ca) || (src.Length() == 0))
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{
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// Let's see if this is an object tag and we have a DATA attribute
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nsIAtom* tag;
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mContent->GetTag(tag);
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if(tag == nsHTMLAtoms::object)
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mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::data, src);
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NS_IF_RELEASE(tag);
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}
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nsAutoString lowSrc;
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nsresult lowSrcResult;
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lowSrcResult = mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::lowsrc, lowSrc);
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// Set the image loader's source URL and base URL
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nsIURI* baseURL = nsnull;
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nsIHTMLContent* htmlContent;
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rv = mContent->QueryInterface(kIHTMLContentIID, (void**)&htmlContent);
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if (NS_SUCCEEDED(rv)) {
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htmlContent->GetBaseURL(baseURL);
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NS_RELEASE(htmlContent);
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}
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else {
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nsIDocument* doc;
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rv = mContent->GetDocument(doc);
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if (NS_SUCCEEDED(rv)) {
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doc->GetBaseURL(baseURL);
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NS_RELEASE(doc);
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}
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}
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if (NS_CONTENT_ATTR_HAS_VALUE == lowSrcResult && lowSrc.Length() > 0) {
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mLowSrcImageLoader = new nsHTMLImageLoader;
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if (mLowSrcImageLoader != nsnull) {
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mLowSrcImageLoader->Init(this, UpdateImageFrame, (void*)mLowSrcImageLoader, baseURL, lowSrc);
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}
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}
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mImageLoader.Init(this, UpdateImageFrame, (void*)&mImageLoader, baseURL, src);
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NS_IF_RELEASE(baseURL);
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nsAutoString usemap;
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mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::usemap, usemap);
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if (usemap.Length()) {
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//Image is an imagemap. We need to get its maps and set the primary
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//frame for its children to us.
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usemap.StripWhitespace();
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nsCOMPtr<nsIDocument> doc;
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if (NS_SUCCEEDED(mContent->GetDocument(*getter_AddRefs(doc))) && doc) {
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if (usemap.First() == '#') {
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usemap.Cut(0, 1);
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}
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nsCOMPtr<nsIHTMLDocument> hdoc(do_QueryInterface(doc));
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if (hdoc) {
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nsCOMPtr<nsIDOMHTMLMapElement> hmap;
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if (NS_SUCCEEDED(hdoc->GetImageMap(usemap, getter_AddRefs(hmap))) && hmap) {
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nsCOMPtr<nsIContent> map(do_QueryInterface(hmap));
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if (map) {
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nsCOMPtr<nsIPresShell> presShell;
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if (NS_SUCCEEDED(aPresContext->GetShell(getter_AddRefs(presShell))) &&
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presShell) {
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nsCOMPtr<nsIFrameManager> frameManager;
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if (NS_SUCCEEDED(presShell->GetFrameManager(getter_AddRefs(frameManager))) &&
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frameManager) {
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nsCOMPtr<nsIContent> childArea;
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PRInt32 count, index;
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map->ChildCount(count);
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for (index = 0; index < count; index++) {
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map->ChildAt(index, *getter_AddRefs(childArea));
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frameManager->SetPrimaryFrameFor(childArea, this);
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}
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}
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}
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}
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}
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}
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}
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}
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mInitialLoadCompleted = PR_FALSE;
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return rv;
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}
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nsresult
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nsImageFrame::UpdateImageFrame(nsIPresContext* aPresContext,
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nsHTMLImageLoader* aLoader,
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nsIFrame* aFrame,
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void* aClosure,
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PRUint32 aStatus)
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{
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nsImageFrame* frame = (nsImageFrame*) aFrame;
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return frame->UpdateImage(aPresContext, aStatus, aClosure);
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}
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nsresult
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nsImageFrame::UpdateImage(nsIPresContext* aPresContext, PRUint32 aStatus, void* aClosure)
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{
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#ifdef NOISY_IMAGE_LOADING
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ListTag(stdout);
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printf(": UpdateImage: status=%x\n", aStatus);
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#endif
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nsCOMPtr<nsIPresShell> presShell;
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aPresContext->GetShell(getter_AddRefs(presShell));
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// check to see if an image error occurred
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PRBool imageFailedToLoad = PR_FALSE;
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if (NS_IMAGE_LOAD_STATUS_ERROR & aStatus) { // We failed to load the image. Notify the pres shell
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// One of the two images didn't load, which one?
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// see if we are loading the lowsrc image
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if (mLowSrcImageLoader != nsnull) {
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// We ARE loading the lowsrc image
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// check to see if the closure data is the lowsrc
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if (aClosure == mLowSrcImageLoader) {
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// The lowsrc failed to load, but only set the bool to true
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// true if the src image failed.
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imageFailedToLoad = mImageLoader.GetImage() == nsnull || (mImageLoader.GetLoadStatus() & NS_IMAGE_LOAD_STATUS_ERROR);
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} else {
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// src failed to load,
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// see if the lowsrc is here so we can paint it instead
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imageFailedToLoad = (mLowSrcImageLoader->GetLoadStatus() & NS_IMAGE_LOAD_STATUS_ERROR) != 0;
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}
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} else {
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imageFailedToLoad = PR_TRUE;
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}
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}
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// if src failed and there is no lowsrc
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// or both failed to load, then notify the PresShell
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if (imageFailedToLoad) {
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if (presShell) {
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nsAutoString usemap;
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mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::usemap, usemap);
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// We failed to load the image. Notify the pres shell if we aren't an image map
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if (usemap.Length() == 0) {
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presShell->CantRenderReplacedElement(aPresContext, this);
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}
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}
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} else if (NS_IMAGE_LOAD_STATUS_SIZE_AVAILABLE & aStatus) {
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if (mParent) {
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mState |= NS_FRAME_IS_DIRTY;
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mParent->ReflowDirtyChild(presShell, (nsIFrame*) this);
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}
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else {
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NS_ASSERTION(0, "No parent to pass the reflow request up to.");
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}
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}
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#if 0 // ifdef'ing out the deleting of the lowsrc image
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// if the "src" image was change via script to an iage that
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// didn't exist, the the author would expect the lowsrc to be displayed.
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// now check to see if we have the entire low
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if (mLowSrcImageLoader != nsnull) {
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nsIImage * image = mImageLoader.GetImage();
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if (image) {
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PRInt32 imgSrcLinesLoaded = image != nsnull?image->GetDecodedY2():-1;
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if (image->GetDecodedY2() == image->GetHeight()) {
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delete mLowSrcImageLoader;
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mLowSrcImageLoader = nsnull;
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}
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NS_RELEASE(image);
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}
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}
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#endif
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return NS_OK;
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}
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void
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nsImageFrame::GetDesiredSize(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredSize)
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{
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PRBool cancelledReflow = PR_FALSE;
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if (mLowSrcImageLoader != nsnull && !(mImageLoader.GetLoadStatus() & NS_IMAGE_LOAD_STATUS_IMAGE_READY)) {
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PRBool gotDesiredSize = mLowSrcImageLoader->GetDesiredSize(aPresContext, &aReflowState, aDesiredSize);
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/*if (gotDesiredSize) {
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// We have our "final" desired size. Cancel any pending
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// incremental reflows aimed at this frame.
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nsIPresShell* shell;
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aPresContext->GetShell(&shell);
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if (shell) {
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shell->CancelReflowCommand(this, nsnull);
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NS_RELEASE(shell);
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}
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}*/
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}
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// Must ask for desiredSize to start loading of image
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// that seems like a bogus API
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if (mImageLoader.GetDesiredSize(aPresContext, &aReflowState, aDesiredSize)) {
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if (!cancelledReflow) {
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// We have our "final" desired size. Cancel any pending
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// incremental reflows aimed at this frame.
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nsIPresShell* shell;
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aPresContext->GetShell(&shell);
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if (shell) {
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shell->CancelReflowCommand(this, nsnull);
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NS_RELEASE(shell);
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}
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}
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}
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}
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void
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nsImageFrame::GetInnerArea(nsIPresContext* aPresContext,
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nsRect& aInnerArea) const
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{
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aInnerArea.x = mBorderPadding.left;
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aInnerArea.y = mBorderPadding.top;
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aInnerArea.width = mRect.width -
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(mBorderPadding.left + mBorderPadding.right);
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aInnerArea.height = mRect.height -
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(mBorderPadding.top + mBorderPadding.bottom);
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}
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NS_IMETHODIMP
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nsImageFrame::Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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DO_GLOBAL_REFLOW_COUNT("nsImageFrame", aReflowState.reason);
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("enter nsImageFrame::Reflow: availSize=%d,%d",
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aReflowState.availableWidth, aReflowState.availableHeight));
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NS_PRECONDITION(mState & NS_FRAME_IN_REFLOW, "frame is not in reflow");
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GetDesiredSize(aPresContext, aReflowState, aMetrics);
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AddBordersAndPadding(aPresContext, aReflowState, aMetrics, mBorderPadding);
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if (nsnull != aMetrics.maxElementSize) {
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// If we have a percentage based width (and no height), then our MES width is 0
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if (eStyleUnit_Percent == aReflowState.mStylePosition->mWidth.GetUnit() &&
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eStyleUnit_Coord != aReflowState.mStylePosition->mHeight.GetUnit()) {
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aMetrics.maxElementSize->width = 0;
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} else {
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aMetrics.maxElementSize->width = aMetrics.width;
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}
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aMetrics.maxElementSize->height = aMetrics.height;
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}
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if (aMetrics.mFlags & NS_REFLOW_CALC_MAX_WIDTH) {
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aMetrics.mMaximumWidth = aMetrics.width;
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}
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
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("exit nsImageFrame::Reflow: size=%d,%d",
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aMetrics.width, aMetrics.height));
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return NS_OK;
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}
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// Computes the width of the specified string. aMaxWidth specifies the maximum
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// width available. Once this limit is reached no more characters are measured.
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// The number of characters that fit within the maximum width are returned in
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// aMaxFit. NOTE: it is assumed that the fontmetrics have already been selected
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// into the rendering context before this is called (for performance). MMP
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void
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nsImageFrame::MeasureString(const PRUnichar* aString,
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PRInt32 aLength,
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nscoord aMaxWidth,
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PRUint32& aMaxFit,
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nsIRenderingContext& aContext)
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{
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nscoord totalWidth = 0;
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nscoord spaceWidth;
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aContext.GetWidth(' ', spaceWidth);
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aMaxFit = 0;
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while (aLength > 0) {
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// Find the next place we can line break
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PRUint32 len = aLength;
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PRBool trailingSpace = PR_FALSE;
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for (PRInt32 i = 0; i < aLength; i++) {
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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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}
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// Measure this chunk of text, and see if it fits
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nscoord width;
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aContext.GetWidth(aString, len, width);
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PRBool fits = (totalWidth + width) <= aMaxWidth;
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// If it fits on the line, or it's the first word we've processed then
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// include it
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if (fits || (0 == totalWidth)) {
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// New piece fits
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totalWidth += width;
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// If there's a trailing space then see if it fits as well
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if (trailingSpace) {
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if ((totalWidth + spaceWidth) <= aMaxWidth) {
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totalWidth += spaceWidth;
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} else {
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// Space won't fit. Leave it at the end but don't include it in
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// the width
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fits = PR_FALSE;
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}
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len++;
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}
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aMaxFit += len;
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aString += len;
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aLength -= len;
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}
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if (!fits) {
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break;
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}
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}
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}
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// Formats the alt-text to fit within the specified rectangle. Breaks lines
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// between words if a word would extend past the edge of the rectangle
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void
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nsImageFrame::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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const nsStyleColor* color =
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(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
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const nsStyleFont* font =
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(const nsStyleFont*)mStyleContext->GetStyleData(eStyleStruct_Font);
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// Set font and color
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aRenderingContext.SetColor(color->mColor);
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aRenderingContext.SetFont(font->mFont);
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// Format the text to display within the formatting rect
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nsIFontMetrics* fm;
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aRenderingContext.GetFontMetrics(fm);
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nscoord maxDescent, height;
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fm->GetMaxDescent(maxDescent);
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fm->GetHeight(height);
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// XXX It would be nice if there was a way to have the font metrics tell
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// use where to break the text given a maximum width. At a minimum we need
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// to be able to get the break character...
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|
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
|
|
MeasureString(str, strLen, aRect.width, maxFit, aRenderingContext);
|
|
|
|
// Display the text
|
|
aRenderingContext.DrawString(str, maxFit, aRect.x, y);
|
|
|
|
// Move to the next line
|
|
str += maxFit;
|
|
strLen -= maxFit;
|
|
y += height;
|
|
}
|
|
|
|
NS_RELEASE(fm);
|
|
}
|
|
|
|
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;
|
|
}
|
|
};
|
|
|
|
void
|
|
nsImageFrame::DisplayAltFeedback(nsIPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
PRInt32 aIconId)
|
|
{
|
|
// Calculate the inner area
|
|
nsRect inner;
|
|
GetInnerArea(aPresContext, inner);
|
|
|
|
// Display a recessed one pixel border
|
|
float p2t;
|
|
nscoord borderEdgeWidth;
|
|
aPresContext->GetScaledPixelsToTwips(&p2t);
|
|
borderEdgeWidth = NSIntPixelsToTwips(1, p2t);
|
|
|
|
// Make sure we have enough room to actually render the border within
|
|
// our frame bounds
|
|
if ((inner.width < 2 * borderEdgeWidth) || (inner.height < 2 * borderEdgeWidth)) {
|
|
return;
|
|
}
|
|
|
|
// Paint the border
|
|
nsRecessedBorder recessedBorder(borderEdgeWidth);
|
|
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this, inner,
|
|
inner, recessedBorder, mStyleContext, 0);
|
|
|
|
// Adjust the inner rect to account for the one pixel recessed border,
|
|
// and a six pixel padding on each edge
|
|
inner.Deflate(NSIntPixelsToTwips(7, p2t), NSIntPixelsToTwips(7, p2t));
|
|
if (inner.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Clip so we don't render outside the inner rect
|
|
PRBool clipState;
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.SetClipRect(inner, nsClipCombine_kIntersect, clipState);
|
|
|
|
// Display the icon
|
|
nsIDeviceContext* dc;
|
|
aRenderingContext.GetDeviceContext(dc);
|
|
nsIImage* icon;
|
|
|
|
if (NS_SUCCEEDED(dc->LoadIconImage(aIconId, icon)) && icon) {
|
|
aRenderingContext.DrawImage(icon, inner.x, inner.y);
|
|
|
|
// Reduce the inner rect by the width of the icon, and leave an
|
|
// additional six pixels padding
|
|
PRInt32 iconWidth = NSIntPixelsToTwips(icon->GetWidth() + 6, p2t);
|
|
inner.x += iconWidth;
|
|
inner.width -= iconWidth;
|
|
|
|
NS_RELEASE(icon);
|
|
}
|
|
|
|
NS_RELEASE(dc);
|
|
|
|
// If there's still room, display the alt-text
|
|
if (!inner.IsEmpty()) {
|
|
nsAutoString altText;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE == mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::alt, altText)) {
|
|
DisplayAltText(aPresContext, aRenderingContext, altText, inner);
|
|
}
|
|
}
|
|
|
|
aRenderingContext.PopState(clipState);
|
|
}
|
|
|
|
NS_METHOD
|
|
nsImageFrame::Paint(nsIPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer)
|
|
{
|
|
const nsStyleDisplay* disp = (const nsStyleDisplay*)
|
|
mStyleContext->GetStyleData(eStyleStruct_Display);
|
|
if (disp->IsVisible() && mRect.width && mRect.height) {
|
|
// First paint background and borders
|
|
nsLeafFrame::Paint(aPresContext, aRenderingContext, aDirtyRect,
|
|
aWhichLayer);
|
|
|
|
// first get to see if lowsrc image is here
|
|
PRInt32 lowSrcLinesLoaded = -1;
|
|
PRInt32 imgSrcLinesLoaded = -1;
|
|
nsIImage * lowImage = nsnull;
|
|
nsIImage * image = nsnull;
|
|
|
|
// if lowsrc is here
|
|
if (mLowSrcImageLoader != nsnull) {
|
|
lowImage = mLowSrcImageLoader->GetImage();
|
|
lowSrcLinesLoaded = lowImage != nsnull?lowImage->GetDecodedY2():-1;
|
|
}
|
|
|
|
image = mImageLoader.GetImage();
|
|
imgSrcLinesLoaded = image != nsnull?image->GetDecodedY2():-1;
|
|
|
|
if (nsnull == image && nsnull == lowImage) {
|
|
// No image yet, or image load failed. Draw the alt-text and an icon
|
|
// indicating the status
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer &&
|
|
!mInitialLoadCompleted) {
|
|
DisplayAltFeedback(aPresContext, aRenderingContext,
|
|
mImageLoader.GetLoadImageFailed()
|
|
? NS_ICON_BROKEN_IMAGE
|
|
: NS_ICON_LOADING_IMAGE);
|
|
}
|
|
}
|
|
else {
|
|
mInitialLoadCompleted = PR_TRUE;
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
|
|
// Now render the image into our content area (the area inside the
|
|
// borders and padding)
|
|
nsRect inner;
|
|
GetInnerArea(aPresContext, inner);
|
|
if (mImageLoader.GetLoadImageFailed()) {
|
|
float p2t;
|
|
aPresContext->GetScaledPixelsToTwips(&p2t);
|
|
if (image != nsnull) {
|
|
inner.width = NSIntPixelsToTwips(image->GetWidth(), p2t);
|
|
inner.height = NSIntPixelsToTwips(image->GetHeight(), p2t);
|
|
} else if (lowImage != nsnull) {
|
|
inner.width = NSIntPixelsToTwips(lowImage->GetWidth(), p2t);
|
|
inner.height = NSIntPixelsToTwips(lowImage->GetHeight(), p2t);
|
|
}
|
|
}
|
|
|
|
if (image != nsnull && imgSrcLinesLoaded > 0) {
|
|
aRenderingContext.DrawImage(image, inner);
|
|
} else if (lowImage != nsnull && lowSrcLinesLoaded > 0) {
|
|
aRenderingContext.DrawImage(lowImage, inner);
|
|
}
|
|
|
|
}
|
|
|
|
nsImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
nsRect inner;
|
|
GetInnerArea(aPresContext, inner);
|
|
PRBool clipState;
|
|
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
|
|
aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.Translate(inner.x, inner.y);
|
|
map->Draw(aPresContext, aRenderingContext);
|
|
aRenderingContext.PopState(clipState);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) &&
|
|
GetShowFrameBorders()) {
|
|
nsImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
nsRect inner;
|
|
GetInnerArea(aPresContext, inner);
|
|
PRBool clipState;
|
|
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
|
|
aRenderingContext.PushState();
|
|
aRenderingContext.Translate(inner.x, inner.y);
|
|
map->Draw(aPresContext, aRenderingContext);
|
|
aRenderingContext.PopState(clipState);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
NS_IF_RELEASE(lowImage);
|
|
NS_IF_RELEASE(image);
|
|
}
|
|
|
|
return nsFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
|
|
}
|
|
|
|
nsImageMap*
|
|
nsImageFrame::GetImageMap()
|
|
{
|
|
if (nsnull == mImageMap) {
|
|
nsAutoString usemap;
|
|
mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::usemap, usemap);
|
|
if (0 == usemap.Length()) {
|
|
return nsnull;
|
|
}
|
|
|
|
// Strip out whitespace in the name for navigator compatability
|
|
// XXX NAV QUIRK
|
|
usemap.StripWhitespace();
|
|
|
|
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_SUCCEEDED(rv)) {
|
|
nsIDOMHTMLMapElement* map;
|
|
rv = hdoc->GetImageMap(usemap, &map);
|
|
NS_RELEASE(hdoc);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mImageMap = new nsImageMap();
|
|
if (nsnull != mImageMap) {
|
|
NS_ADDREF(mImageMap);
|
|
mImageMap->Init(map);
|
|
}
|
|
NS_IF_RELEASE(map);
|
|
}
|
|
}
|
|
}
|
|
|
|
return mImageMap;
|
|
}
|
|
|
|
void
|
|
nsImageFrame::TriggerLink(nsIPresContext* aPresContext,
|
|
const nsString& aURLSpec,
|
|
const nsString& aTargetSpec,
|
|
PRBool aClick)
|
|
{
|
|
// We get here with server side image map
|
|
nsILinkHandler* handler = nsnull;
|
|
aPresContext->GetLinkHandler(&handler);
|
|
if (nsnull != handler) {
|
|
if (aClick) {
|
|
nsresult proceed = NS_OK;
|
|
// Check that this page is allowed to load this URI.
|
|
// Almost a copy of the similarly named method in nsGenericElement
|
|
nsresult rv;
|
|
NS_WITH_SERVICE(nsIScriptSecurityManager, securityManager,
|
|
NS_SCRIPTSECURITYMANAGER_PROGID, &rv);
|
|
|
|
nsCOMPtr<nsIPresShell> ps;
|
|
if (NS_SUCCEEDED(rv))
|
|
rv = aPresContext->GetShell(getter_AddRefs(ps));
|
|
nsCOMPtr<nsIDocument> doc;
|
|
if (NS_SUCCEEDED(rv) && ps)
|
|
rv = ps->GetDocument(getter_AddRefs(doc));
|
|
|
|
nsCOMPtr<nsIURI> baseURI;
|
|
if (NS_SUCCEEDED(rv) && doc)
|
|
baseURI = dont_AddRef(doc->GetDocumentURL());
|
|
nsCOMPtr<nsIURI> absURI;
|
|
if (NS_SUCCEEDED(rv))
|
|
rv = NS_NewURI(getter_AddRefs(absURI), aURLSpec, baseURI);
|
|
|
|
if (NS_SUCCEEDED(rv))
|
|
proceed = securityManager->CheckLoadURI(baseURI, absURI, PR_FALSE);
|
|
|
|
// Only pass off the click event if the script security manager
|
|
// says it's ok.
|
|
if (NS_SUCCEEDED(proceed))
|
|
handler->OnLinkClick(mContent, eLinkVerb_Replace, aURLSpec.GetUnicode(), aTargetSpec.GetUnicode());
|
|
}
|
|
else {
|
|
handler->OnOverLink(mContent, aURLSpec.GetUnicode(), aTargetSpec.GetUnicode());
|
|
}
|
|
NS_RELEASE(handler);
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsImageFrame::IsServerImageMap()
|
|
{
|
|
nsAutoString ismap;
|
|
return NS_CONTENT_ATTR_HAS_VALUE ==
|
|
mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::ismap, ismap);
|
|
}
|
|
|
|
PRIntn
|
|
nsImageFrame::GetSuppress()
|
|
{
|
|
nsAutoString s;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE ==
|
|
mContent->GetAttribute(kNameSpaceID_HTML, nsHTMLAtoms::suppress, s)) {
|
|
if (s.EqualsIgnoreCase("true")) {
|
|
return SUPPRESS;
|
|
} else if (s.EqualsIgnoreCase("false")) {
|
|
return DONT_SUPPRESS;
|
|
}
|
|
}
|
|
return DEFAULT_SUPPRESS;
|
|
}
|
|
|
|
//XXX the event come's in in view relative coords, but really should
|
|
//be in frame relative coords by the time it hits our frame.
|
|
|
|
// Translate an point that is relative to our view (or a containing
|
|
// view) into a localized pixel coordinate that is relative to the
|
|
// content area of this frame (inside the border+padding).
|
|
void
|
|
nsImageFrame::TranslateEventCoords(nsIPresContext* aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsPoint& aResult)
|
|
{
|
|
nscoord x = aPoint.x;
|
|
nscoord y = aPoint.y;
|
|
|
|
// If we have a view then the event coordinates are already relative
|
|
// to this frame; otherwise we have to adjust the coordinates
|
|
// appropriately.
|
|
nsIView* view;
|
|
GetView(aPresContext, &view);
|
|
if (nsnull == view) {
|
|
nsPoint offset;
|
|
GetOffsetFromView(aPresContext, offset, &view);
|
|
if (nsnull != view) {
|
|
x -= offset.x;
|
|
y -= offset.y;
|
|
}
|
|
}
|
|
|
|
// Subtract out border and padding here so that the coordinates are
|
|
// now relative to the content area of this frame.
|
|
nsRect inner;
|
|
GetInnerArea(aPresContext, inner);
|
|
x -= inner.x;
|
|
y -= inner.y;
|
|
|
|
// Translate the coordinates from twips to pixels
|
|
float t2p;
|
|
aPresContext->GetTwipsToPixels(&t2p);
|
|
aResult.x = NSTwipsToIntPixels(x, t2p);
|
|
aResult.y = NSTwipsToIntPixels(y, t2p);
|
|
}
|
|
|
|
PRBool
|
|
nsImageFrame::GetAnchorHREF(nsString& aResult)
|
|
{
|
|
PRBool status = PR_FALSE;
|
|
aResult.Truncate();
|
|
|
|
// Walk up the content tree, looking for an nsIDOMAnchorElement
|
|
nsCOMPtr<nsIContent> content;
|
|
mContent->GetParent(*getter_AddRefs(content));
|
|
while (content) {
|
|
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor(do_QueryInterface(content));
|
|
if (anchor) {
|
|
anchor->GetHref(aResult);
|
|
if (aResult.Length() > 0) {
|
|
status = PR_TRUE;
|
|
}
|
|
break;
|
|
}
|
|
nsCOMPtr<nsIContent> parent;
|
|
content->GetParent(*getter_AddRefs(parent));
|
|
content = parent;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetContentForEvent(nsIPresContext* aPresContext,
|
|
nsEvent* aEvent,
|
|
nsIContent** aContent)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aContent);
|
|
nsImageMap* map;
|
|
map = GetImageMap();
|
|
|
|
if (nsnull != map) {
|
|
nsPoint p;
|
|
TranslateEventCoords(aPresContext, aEvent->point, p);
|
|
nsAutoString absURL, target, altText;
|
|
PRBool suppress;
|
|
PRBool inside = PR_FALSE;
|
|
nsCOMPtr<nsIContent> area;
|
|
inside = map->IsInside(p.x, p.y, getter_AddRefs(area),
|
|
absURL, target, altText,
|
|
&suppress);
|
|
if (inside && area) {
|
|
*aContent = area;
|
|
NS_ADDREF(*aContent);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return GetContent(aContent);
|
|
}
|
|
|
|
// XXX what should clicks on transparent pixels do?
|
|
NS_METHOD
|
|
nsImageFrame::HandleEvent(nsIPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aEventStatus);
|
|
nsImageMap* map;
|
|
|
|
switch (aEvent->message) {
|
|
case NS_MOUSE_LEFT_BUTTON_UP:
|
|
case NS_MOUSE_MOVE:
|
|
{
|
|
map = GetImageMap();
|
|
PRBool isServerMap = IsServerImageMap();
|
|
if ((nsnull != map) || isServerMap) {
|
|
nsPoint p;
|
|
TranslateEventCoords(aPresContext, aEvent->point, p);
|
|
nsAutoString absURL, target, altText;
|
|
PRBool suppress;
|
|
PRBool inside = PR_FALSE;
|
|
// Even though client-side image map triggering happens
|
|
// through content, we need to make sure we're not inside
|
|
// (in case we deal with a case of both client-side and
|
|
// sever-side on the same image - it happens!)
|
|
if (nsnull != map) {
|
|
nsCOMPtr<nsIContent> area;
|
|
inside = map->IsInside(p.x, p.y, getter_AddRefs(area),
|
|
absURL, target, altText,
|
|
&suppress);
|
|
}
|
|
|
|
if (!inside && isServerMap) {
|
|
suppress = GetSuppress();
|
|
nsIURI* baseURL = nsnull;
|
|
nsIHTMLContent* htmlContent;
|
|
if (NS_SUCCEEDED(mContent->QueryInterface(kIHTMLContentIID,
|
|
(void**)&htmlContent))) {
|
|
htmlContent->GetBaseURL(baseURL);
|
|
NS_RELEASE(htmlContent);
|
|
}
|
|
else {
|
|
nsIDocument* doc;
|
|
if (NS_SUCCEEDED(mContent->GetDocument(doc))) {
|
|
doc->GetBaseURL(baseURL);
|
|
NS_RELEASE(doc);
|
|
}
|
|
}
|
|
|
|
// Server side image maps use the href in a containing anchor
|
|
// element to provide the basis for the destination url.
|
|
nsAutoString src;
|
|
if (GetAnchorHREF(src)) {
|
|
NS_MakeAbsoluteURI(absURL, src, baseURL);
|
|
NS_IF_RELEASE(baseURL);
|
|
|
|
// XXX if the mouse is over/clicked in the border/padding area
|
|
// we should probably just pretend nothing happened. Nav4
|
|
// keeps the x,y coordinates positive as we do; IE doesn't
|
|
// bother. Both of them send the click through even when the
|
|
// mouse is over the border.
|
|
if (p.x < 0) p.x = 0;
|
|
if (p.y < 0) p.y = 0;
|
|
char cbuf[50];
|
|
PR_snprintf(cbuf, sizeof(cbuf), "?%d,%d", p.x, p.y);
|
|
absURL.AppendWithConversion(cbuf);
|
|
PRBool clicked = PR_FALSE;
|
|
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_UP) {
|
|
*aEventStatus = nsEventStatus_eConsumeDoDefault;
|
|
clicked = PR_TRUE;
|
|
}
|
|
TriggerLink(aPresContext, absURL, target, clicked);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return nsLeafFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
}
|
|
|
|
//XXX This will need to be rewritten once we have content for areas
|
|
NS_METHOD
|
|
nsImageFrame::GetCursor(nsIPresContext* aPresContext,
|
|
nsPoint& aPoint,
|
|
PRInt32& aCursor)
|
|
{
|
|
nsImageMap* map = GetImageMap();
|
|
if (nsnull != map) {
|
|
nsPoint p;
|
|
TranslateEventCoords(aPresContext, aPoint, p);
|
|
aCursor = NS_STYLE_CURSOR_DEFAULT;
|
|
if (map->IsInside(p.x, p.y)) {
|
|
// Use style defined cursor if one is provided, otherwise when
|
|
// the cursor style is "auto" we use the pointer cursor.
|
|
const nsStyleColor* styleColor;
|
|
GetStyleData(eStyleStruct_Color, (const nsStyleStruct*&)styleColor);
|
|
aCursor = styleColor->mCursor;
|
|
if (NS_STYLE_CURSOR_AUTO == aCursor) {
|
|
aCursor = NS_STYLE_CURSOR_POINTER;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
return nsFrame::GetCursor(aPresContext, aPoint, aCursor);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::AttributeChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aHint)
|
|
{
|
|
nsresult rv = nsLeafFrame::AttributeChanged(aPresContext, aChild,
|
|
aNameSpaceID, aAttribute, aHint);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
if (nsHTMLAtoms::src == aAttribute) {
|
|
nsAutoString oldSRC, newSRC;
|
|
mImageLoader.GetURLSpec(oldSRC);
|
|
aChild->GetAttribute(kNameSpaceID_None, nsHTMLAtoms::src, newSRC);
|
|
if (!oldSRC.Equals(newSRC)) {
|
|
#ifdef NOISY_IMAGE_LOADING
|
|
ListTag(stdout);
|
|
printf(": new image source; old='");
|
|
fputs(oldSRC, stdout);
|
|
printf("' new='");
|
|
fputs(newSRC, stdout);
|
|
printf("'\n");
|
|
#endif
|
|
|
|
if (mImageLoader.IsImageSizeKnown()) {
|
|
mImageLoader.UpdateURLSpec(aPresContext, newSRC);
|
|
PRUint32 loadStatus = mImageLoader.GetLoadStatus();
|
|
if (loadStatus & NS_IMAGE_LOAD_STATUS_IMAGE_READY) {
|
|
// Trigger a paint now because image-loader won't if the
|
|
// image is already loaded and ready to go.
|
|
Invalidate(aPresContext, nsRect(0, 0, mRect.width, mRect.height), PR_FALSE);
|
|
}
|
|
}
|
|
else {
|
|
// Stop the earlier image load
|
|
mImageLoader.StopLoadImage(aPresContext);
|
|
|
|
// Update the URL and start the new image load
|
|
mImageLoader.UpdateURLSpec(aPresContext, newSRC);
|
|
}
|
|
}
|
|
}
|
|
else if (nsHTMLAtoms::width == aAttribute || nsHTMLAtoms::height == aAttribute)
|
|
{ // XXX: could check for new width == old width, and make that a no-op
|
|
nsCOMPtr<nsIPresShell> presShell;
|
|
aPresContext->GetShell(getter_AddRefs(presShell));
|
|
mState |= NS_FRAME_IS_DIRTY;
|
|
mParent->ReflowDirtyChild(presShell, (nsIFrame*) this);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetFrameType(nsIAtom** aType) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
|
|
*aType = nsLayoutAtoms::imageFrame;
|
|
NS_ADDREF(*aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::GetIntrinsicImageSize(nsSize& aSize)
|
|
{
|
|
mImageLoader.GetIntrinsicSize(aSize);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsImageFrame::IsImageComplete(PRBool* aComplete)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aComplete);
|
|
*aComplete = ((mImageLoader.GetLoadStatus() & NS_IMAGE_LOAD_STATUS_IMAGE_READY) != 0);
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsImageFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
|
|
{
|
|
if (!aResult) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
PRUint32 sum;
|
|
mImageLoader.SizeOf(aHandler, &sum);
|
|
sum += sizeof(*this) - sizeof(mImageLoader);
|
|
if (mImageMap) {
|
|
PRBool recorded;
|
|
aHandler->RecordObject((void*) mImageMap, &recorded);
|
|
if (!recorded) {
|
|
PRUint32 mapSize;
|
|
mImageMap->SizeOf(aHandler, &mapSize);
|
|
aHandler->AddSize(nsLayoutAtoms::imageMap, mapSize);
|
|
}
|
|
}
|
|
*aResult = sum;
|
|
return NS_OK;
|
|
}
|
|
#endif
|