281 lines
8.1 KiB
C++
281 lines
8.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Author: Aaron Leventhal (aaronl@netscape.com)
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsHTMLImageAccessible.h"
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#include "nsIHTMLDocument.h"
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#include "nsIPresShell.h"
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#include "nsIDocument.h"
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#include "nsIDOMHTMLCollection.h"
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#include "nsIAccessibilityService.h"
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#include "nsIServiceManager.h"
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#include "imgIRequest.h"
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#include "imgIContainer.h"
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#include "nsIImageLoadingContent.h"
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#include "nsNetUtil.h"
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// --- image -----
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nsHTMLImageAccessible::nsHTMLImageAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
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nsLinkableAccessible(aDOMNode, aShell)
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{
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nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aDOMNode));
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nsCOMPtr<nsIDocument> doc;
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nsCOMPtr<nsIPresShell> shell(do_QueryReferent(mWeakShell));
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if (!shell)
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return;
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shell->GetDocument(getter_AddRefs(doc));
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nsAutoString mapElementName;
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if (doc && element) {
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nsCOMPtr<nsIHTMLDocument> htmlDoc(do_QueryInterface(doc));
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element->GetAttribute(NS_LITERAL_STRING("usemap"),mapElementName);
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if (htmlDoc && !mapElementName.IsEmpty()) {
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if (mapElementName.CharAt(0) == '#')
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mapElementName.Cut(0,1);
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htmlDoc->GetImageMap(mapElementName, getter_AddRefs(mMapElement));
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}
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}
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}
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccState(PRUint32 *_retval)
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{
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// The state is a bitfield, get our inherited state, then logically OR it with STATE_ANIMATED if this
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// is an animated image.
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nsLinkableAccessible::GetAccState(_retval);
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nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mDOMNode));
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nsCOMPtr<imgIRequest> imageRequest;
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if (content)
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content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(imageRequest));
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nsCOMPtr<imgIContainer> imgContainer;
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if (imageRequest)
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imageRequest->GetImage(getter_AddRefs(imgContainer));
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if (imgContainer) {
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PRUint32 numFrames;
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imgContainer->GetNumFrames(&numFrames);
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if (numFrames > 1)
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*_retval |= STATE_ANIMATED;
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}
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return NS_OK;
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}
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/* wstring getAccName (); */
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccName(nsAString& _retval)
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{
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nsresult rv = NS_ERROR_FAILURE;
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nsCOMPtr<nsIContent> imageContent(do_QueryInterface(mDOMNode));
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if (imageContent) {
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nsAutoString name;
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rv = AppendFlatStringFromContentNode(imageContent, &name);
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if (NS_SUCCEEDED(rv)) {
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// Temp var needed until CompressWhitespace built for nsAString
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name.CompressWhitespace();
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_retval.Assign(name);
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}
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}
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return rv;
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}
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/* wstring getAccRole (); */
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccRole(PRUint32 *_retval)
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{
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*_retval = ROLE_GRAPHIC;
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return NS_OK;
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}
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nsIAccessible *nsHTMLImageAccessible::CreateAreaAccessible(PRInt32 areaNum)
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{
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if (!mMapElement)
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return nsnull;
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if (areaNum == -1) {
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PRInt32 numAreaMaps;
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GetAccChildCount(&numAreaMaps);
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if (numAreaMaps<=0)
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return nsnull;
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areaNum = NS_STATIC_CAST(PRUint32,numAreaMaps-1);
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}
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nsCOMPtr<nsIDOMHTMLCollection> mapAreas;
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mMapElement->GetAreas(getter_AddRefs(mapAreas));
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if (!mapAreas)
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return nsnull;
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nsCOMPtr<nsIDOMNode> domNode;
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mapAreas->Item(areaNum,getter_AddRefs(domNode));
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if (!domNode)
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return nsnull;
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nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
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if (!accService)
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return nsnull;
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if (accService) {
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nsIAccessible* acc = nsnull;
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accService->GetCachedAccessible(domNode, mWeakShell, &acc);
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if (!acc) {
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accService->CreateHTMLAreaAccessible(mWeakShell, domNode, this, &acc);
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}
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return acc;
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}
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return nsnull;
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}
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/* nsIAccessible getAccFirstChild (); */
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccFirstChild(nsIAccessible **_retval)
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{
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*_retval = CreateAreaAccessible(0);
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return NS_OK;
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}
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/* nsIAccessible getAccLastChild (); */
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccLastChild(nsIAccessible **_retval)
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{
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*_retval = CreateAreaAccessible(-1);
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return NS_OK;
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}
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#ifdef NEVER
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/* long getAccChildCount (); */
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NS_IMETHODIMP nsHTMLImageAccessible::GetAccChildCount(PRInt32 *_retval)
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{
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*_retval = 0;
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if (mMapElement) {
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nsCOMPtr<nsIDOMHTMLCollection> mapAreas;
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mMapElement->GetAreas(getter_AddRefs(mapAreas));
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if (mapAreas) {
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PRUint32 length;
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mapAreas->GetLength(&length);
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*_retval = NS_STATIC_CAST(PRInt32, length);
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}
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}
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return NS_OK;
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}
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#endif
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// Image map hyperlink
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NS_IMPL_ISUPPORTS_INHERITED1(nsHTMLImageMapAccessible, nsHTMLImageAccessible, nsIAccessibleHyperLink)
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/* readonly attribute long anchors; */
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NS_IMETHODIMP nsHTMLImageMapAccessible::GetAnchors(PRInt32 *aAnchors)
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{
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return GetAccChildCount(aAnchors);
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}
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/* readonly attribute long startIndex; */
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NS_IMETHODIMP nsHTMLImageMapAccessible::GetStartIndex(PRInt32 *aStartIndex)
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{
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//should not be supported in image map hyperlink
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* readonly attribute long endIndex; */
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NS_IMETHODIMP nsHTMLImageMapAccessible::GetEndIndex(PRInt32 *aEndIndex)
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{
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//should not be supported in image map hyperlink
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* nsIURI getURI (in long i); */
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NS_IMETHODIMP nsHTMLImageMapAccessible::GetURI(PRInt32 aIndex, nsIURI **aURI)
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{
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*aURI = nsnull;
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nsCOMPtr<nsIDOMHTMLCollection> mapAreas;
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mMapElement->GetAreas(getter_AddRefs(mapAreas));
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if (!mapAreas)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIDOMNode> domNode;
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mapAreas->Item(aIndex,getter_AddRefs(domNode));
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if (!domNode)
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return NS_ERROR_FAILURE;
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nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
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if (content) {
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nsCOMPtr<nsIDocument> doc;
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if (NS_SUCCEEDED(content->GetDocument(*getter_AddRefs(doc)))) {
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nsCOMPtr<nsIURI> baseURI;
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if (NS_SUCCEEDED(doc->GetBaseURL(*getter_AddRefs(baseURI)))) {
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nsCOMPtr<nsIDOMElement> area(do_QueryInterface(domNode));
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nsAutoString hrefValue;
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if (NS_SUCCEEDED(area->GetAttribute(NS_LITERAL_STRING("href"), hrefValue))) {
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return NS_NewURI(aURI, hrefValue, nsnull, baseURI);
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}
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}
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}
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}
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return NS_ERROR_FAILURE;
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}
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/* nsIAccessible getObject (in long i); */
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NS_IMETHODIMP nsHTMLImageMapAccessible::GetObject(PRInt32 aIndex,
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nsIAccessible **aAccessible)
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{
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*aAccessible = CreateAreaAccessible(aIndex);
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return NS_OK;
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}
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/* boolean isValid (); */
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NS_IMETHODIMP nsHTMLImageMapAccessible::IsValid(PRBool *aIsValid)
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{
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*aIsValid = PR_TRUE;
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return NS_OK;
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}
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/* boolean isSelected (); */
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NS_IMETHODIMP nsHTMLImageMapAccessible::IsSelected(PRBool *aIsSelected)
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{
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*aIsSelected = PR_FALSE;
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return NS_OK;
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}
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