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429 lines
11 KiB
JavaScript
429 lines
11 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Alexander Surkov <surkov.alexander@gmail.com> (original author)
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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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/***************************************************************
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* AccessibleEventsViewer --------------------------------------------
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* The viewer for the accessible tree of a document.
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* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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* REQUIRED IMPORTS:
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* chrome://inspector/content/jsutil/xpcom/XPCU.js
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****************************************************************/
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///////////////////////////////////////////////////////////////////////////////
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//// Global Variables
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var viewer;
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///////////////////////////////////////////////////////////////////////////////
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//// Global Constants
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const kAccessibleRetrievalCID = "@mozilla.org/accessibleRetrieval;1";
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const nsIAccessibleRetrieval = Components.interfaces.nsIAccessibleRetrieval;
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const nsIAccessibleEvent = Components.interfaces.nsIAccessibleEvent;
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const nsIAccessible = Components.interfaces.nsIAccessible;
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const nsIAccessNode = Components.interfaces.nsIAccessNode;
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///////////////////////////////////////////////////////////////////////////////
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//// Initialization
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window.addEventListener("load", AccessibleTreeViewer_initialize, false);
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function AccessibleTreeViewer_initialize()
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{
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viewer = new AccessibleTreeViewer();
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viewer.initialize(parent.FrameExchange.receiveData(window));
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}
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///////////////////////////////////////////////////////////////////////////////
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//// AccessibleEventsViewer
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function AccessibleTreeViewer()
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{
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this.mURL = window.location;
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this.mObsMan = new ObserverManager(this);
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this.mTree = document.getElementById("olAccessibleTree");
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this.mOlBox = this.mTree.treeBoxObject;
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}
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AccessibleTreeViewer.prototype =
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{
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//Initialization
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mSubject: null,
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mPane: null,
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mView: null,
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// interface inIViewer
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get uid() { return "accessibleTree"; },
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get pane() { return this.mPane; },
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get selection() { return this.mSelection; },
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get subject() { return this.mSubject; },
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set subject(aObject)
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{
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this.mView = new inAccTreeView(aObject);
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this.mOlBox.view = this.mView;
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this.mObsMan.dispatchEvent("subjectChange", { subject: aObject });
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this.mView.selection.select(0);
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},
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initialize: function initialize(aPane)
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{
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this.mPane = aPane;
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aPane.notifyViewerReady(this);
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},
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destroy: function destroy()
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{
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this.mOlBox.view = null;
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},
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isCommandEnabled: function isCommandEnabled(aCommand)
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{
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return false;
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},
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getCommand: function getCommand(aCommand)
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{
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return null;
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},
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// event dispatching
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addObserver: function addObserver(aEvent, aObserver)
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{
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this.mObsMan.addObserver(aEvent, aObserver);
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},
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removeObserver: function removeObserver(aEvent, aObserver)
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{
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this.mObsMan.removeObserver(aEvent, aObserver);
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},
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// stuff
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onItemSelected: function onItemSelected()
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{
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var idx = this.mTree.currentIndex;
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this.mSelection = this.mView.getDOMNode(idx);
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this.mObsMan.dispatchEvent("selectionChange",
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{ selection: this.mSelection } );
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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//// inAccTreeView
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function inAccTreeView(aDocument)
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{
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this.mNodes = [];
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this.mAccService = XPCU.getService(kAccessibleRetrievalCID,
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nsIAccessibleRetrieval);
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this.mDocument = aDocument;
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this.mAccDocument = this.mAccService.getAccessibleFor(aDocument);
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var node = this.createNode(this.mAccDocument);
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this.mNodes.push(node);
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}
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///////////////////////////////////////////////////////////////////////////////
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//// inAccTreeView. nsITreeView interface
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inAccTreeView.prototype = new inBaseTreeView();
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inAccTreeView.prototype.__defineGetter__("rowCount",
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function rowCount()
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{
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return this.mNodes.length;
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});
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inAccTreeView.prototype.getCellText =
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function getCellText(aRow, aCol)
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{
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var node = this.rowToNode(aRow);
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if (!node)
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return "";
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var accessible = node.accessible;
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if (aCol.id == "olcRole")
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return this.mAccService.getStringRole(accessible.finalRole);
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if (aCol.id == "olcName")
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return accessible.name;
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if (aCol.id == "olcNodeName") {
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var node = this.getDOMNodeFor(accessible);
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return node ? node.nodeName : "";
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}
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return "";
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}
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inAccTreeView.prototype.isContainer =
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function isContainer(aRow)
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{
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var node = this.rowToNode(aRow);
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return node ? node.isContainer : false;
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}
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inAccTreeView.prototype.isContainerOpen =
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function isContainerOpen(aRow)
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{
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var node = this.rowToNode(aRow);
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return node ? node.isOpen : false;
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}
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inAccTreeView.prototype.isContainerEmpty =
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function isContainerEmpty(aRow)
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{
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return !this.isContainer(aRow);
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}
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inAccTreeView.prototype.getLevel =
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function getLevel(aRow)
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{
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var node = this.rowToNode(aRow);
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return node ? node.level : 0;
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}
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inAccTreeView.prototype.getParentIndex =
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function getParentIndex(aRow)
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{
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var node = this.rowToNode(aRow);
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if (!node)
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return -1;
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var checkNode = null;
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var i = aRow - 1;
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do {
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checkNode = this.rowToNode(i);
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if (!checkNode)
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return -1;
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if (checkNode == node.parent)
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return i;
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--i;
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} while (checkNode);
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return -1;
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}
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inAccTreeView.prototype.hasNextSibling =
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function hasNextSibling(aRow, aAfterRow)
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{
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var node = this.rowToNode(aRow);
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return node && (node.next != null);
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}
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inAccTreeView.prototype.toggleOpenState =
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function toggleOpenState(aRow)
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{
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var node = this.rowToNode(aRow);
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if (!node)
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return;
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var oldCount = this.rowCount;
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if (node.isOpen)
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this.collapseNode(aRow);
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else
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this.expandNode(aRow);
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this.mTree.invalidateRow(aRow);
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this.mTree.rowCountChanged(aRow + 1, this.rowCount - oldCount);
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}
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///////////////////////////////////////////////////////////////////////////////
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//// inAccTreeView. Tree utils.
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/**
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* Expands a tree node on the given row.
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*
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* @param aRow - row index.
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*/
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inAccTreeView.prototype.expandNode =
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function expandNode(aRow)
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{
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var node = this.rowToNode(aRow);
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if (!node)
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return;
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var kids = node.accessible.children;
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var kidCount = kids.length;
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var newNode = null;
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var prevNode = null;
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for (var i = 0; i < kidCount; ++i) {
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var accessible = kids.queryElementAt(i, nsIAccessible);
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newNode = this.createNode(accessible, node);
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this.mNodes.splice(aRow + i + 1, 0, newNode);
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if (prevNode)
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prevNode.next = newNode;
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newNode.previous = prevNode;
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prevNode = newNode;
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}
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node.isOpen = true;
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}
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/**
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* Collapse a tree node on the given row.
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*
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* @param aRow - row index.
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*/
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inAccTreeView.prototype.collapseNode =
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function collapseNode(aRow)
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{
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var node = this.rowToNode(aRow);
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if (!node)
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return;
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var row = this.getLastDescendantOf(node, aRow);
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this.mNodes.splice(aRow + 1, row - aRow);
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node.isOpen = false;
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}
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/**
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* Create a tree node.
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*
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* @param aAccessible - an accessible object associated with created tree node.
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* @param aParent - parent tree node for the created tree node.
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* @retrurn - tree node object for the given accesible.
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*/
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inAccTreeView.prototype.createNode =
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function createNode(aAccessible, aParent)
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{
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var node = new inAccTreeViewNode(aAccessible);
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node.level = aParent ? aParent.level + 1 : 0;
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node.parent = aParent;
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node.isContainer = aAccessible.children.length > 0;
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return node;
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}
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/**
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* Return row index of the last node that is a descendant of the given node.
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* If there is no required node then return the given row.
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*
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* @param aNode - tree node for that last descedant is searched.
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* @param aRow - row index of the given tree node.
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*/
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inAccTreeView.prototype.getLastDescendantOf =
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function getLastDescendantOf(aNode, aRow)
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{
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var rowCount = this.rowCount;
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var row = aRow + 1;
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for (; row < rowCount; ++row) {
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if (this.mNodes[row].level <= aNode.level)
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return row - 1;
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}
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return rowCount - 1;
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}
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/**
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* Return a tree node by the given row.
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*
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* @param aRow - row index.
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*/
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inAccTreeView.prototype.rowToNode =
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function rowToNode(aRow)
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{
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if (aRow < 0 || aRow >= this.rowCount)
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return null;
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return this.mNodes[aRow];
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}
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///////////////////////////////////////////////////////////////////////////////
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//// inAccTreeView. Accessibility utils.
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/**
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* Return DOM node for the given accessible.
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*
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* @param aAccessible - an accessible object.
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*/
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inAccTreeView.prototype.getDOMNodeFor =
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function getDOMNodeFor(aAccessible)
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{
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var accessNode = XPCU.QI(aAccessible, nsIAccessNode);
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var DOMNode = accessNode.DOMNode;
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DOMNode.setUserData("accessible", aAccessible, null);
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return DOMNode;
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}
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/**
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* Return DOM node for an accessible of the tree node pointed by the given
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* row index.
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*
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* @param aRow - row index.
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*/
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inAccTreeView.prototype.getDOMNode =
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function getDOMNode(aRow)
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{
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var node = this.mNodes[aRow];
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if (!node)
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return null;
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return this.getDOMNodeFor(node.accessible);
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}
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///////////////////////////////////////////////////////////////////////////////
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//// inAccTreeViewNode
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function inAccTreeViewNode(aAccessible)
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{
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this.accessible = aAccessible;
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this.parent = null;
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this.next = null;
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this.previous = null;
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this.level = 0;
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this.isOpen = false;
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this.isContainer = false;
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}
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