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- /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- * The contents of this file are subject to the Netscape Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/NPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is Mozilla Communicator client code, released
- * March 31, 1998.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998-1999 Netscape Communications Corporation. All
- * Rights Reserved.
- * Contributor(s):
- * Ian Oeschger <oeschger@brownhen.com> (Original Author)
- * Peter Wilson (added sidebar tabs)
- * R.J. Keller <rlk@trfenv.com>
- */
-
- dump('loading file: help.js\n');
-
- //-------- global variables
- var helpBrowser;
- var helpWindow;
- var helpSearchPanel;
- var emptySearch;
- var emptySearchText
- var emptySearchLink
- var helpTocPanel;
- var helpIndexPanel;
- var helpGlossaryPanel;
-
- // Namespaces
- const NC = "http://home.netscape.com/NC-rdf#";
- const SN = "rdf:http://www.w3.org/1999/02/22-rdf-syntax-ns#";
- const XML = "http://www.w3.org/XML/1998/namespace#"
- const MAX_LEVEL = 40; // maximum depth of recursion in search datasources.
-
- // Resources
- const RDF = Components.classes["@mozilla.org/rdf/rdf-service;1"].getService(Components.interfaces.nsIRDFService);
- const RDF_ROOT = RDF.GetResource("urn:root");
- const NC_PANELLIST = RDF.GetResource(NC + "panellist");
- const NC_PANELID = RDF.GetResource(NC + "panelid");
- const NC_EMPTY_SEARCH_TEXT = RDF.GetResource(NC + "emptysearchtext");
- const NC_EMPTY_SEARCH_LINK = RDF.GetResource(NC + "emptysearchlink");
- const NC_DATASOURCES = RDF.GetResource(NC + "datasources");
- const NC_SUBHEADINGS = RDF.GetResource(NC + "subheadings");
- const NC_NAME = RDF.GetResource(NC + "name");
- const NC_CHILD = RDF.GetResource(NC + "child");
- const NC_LINK = RDF.GetResource(NC + "link");
- const NC_TITLE = RDF.GetResource(NC + "title");
- const NC_BASE = RDF.GetResource(NC + "base");
- const NC_DEFAULTTOPIC = RDF.GetResource(NC + "defaulttopic");
-
- const RDFCUtils = Components.classes["@mozilla.org/rdf/container-utils;1"].getService(Components.interfaces.nsIRDFContainerUtils);
- const RDFContainer = Components.classes["@mozilla.org/rdf/container;1"].getService(Components.interfaces.nsIRDFContainer);
- const CONSOLE_SERVICE = Components.classes['@mozilla.org/consoleservice;1'].getService(Components.interfaces.nsIConsoleService);
-
- const MAX_HISTORY_MENU_ITEMS = 15;
-
- var urnID = 0;
- var RE;
-
- var helpFileURI;
- var helpFileDS;
- // Set from nc:base attribute on help rdf file. It may be used for prefix reduction on all links within
- // the current help set.
- var helpBaseURI;
-
- const defaultHelpFile = "chrome://help/locale/mozillahelp.rdf";
- // Set from nc:defaulttopic. It is used when the requested uri has no topic specified.
- var defaultTopic = "welcome";
- var searchDatasources = "rdf:null";
- var searchDS = null;
-
- const NSRESULT_RDF_SYNTAX_ERROR = 0x804e03f7;
-
- // This function is called by dialogs/windows that want to display context-sensitive help
- // These dialogs/windows should include the script chrome://help/content/contextHelp.js
- function displayTopic(topic) {
- // Use default topic if topic is not specified.
- if (!topic)
- topic = defaultTopic;
-
- // Get the help page to open.
- var uri = getLink(topic);
-
- // Use default topic if specified topic is not found.
- if (!uri) // Topic not found - revert to default.
- uri = getLink(defaultTopic);
- loadURI(uri);
- }
-
- // Initialize the Help window
- function init() {
- debug('init()');
-
- //cache panel references.
- helpWindow = document.getElementById("help");
- helpSearchPanel = document.getElementById("help-search-panel");
- helpTocPanel = document.getElementById("help-toc-panel");
- helpIndexPanel = document.getElementById("help-index-panel");
- helpGlossaryPanel = document.getElementById("help-glossary-panel");
- helpBrowser = document.getElementById("help-content");
-
- // Get the help content pack, base URL, and help topic
- var helpTopic = defaultTopic;
- if ("arguments" in window && window.arguments[0] instanceof Components.interfaces.nsIDialogParamBlock) {
- helpFileURI = window.arguments[0].GetString(0);
- helpBaseURI = helpFileURI.substring(0, helpFileURI.lastIndexOf("/")+1); // trailing "/" included.
- helpTopic = window.arguments[0].GetString(1);
- }
-
- loadHelpRDF();
-
- displayTopic(helpTopic);
-
- // Initalize History.
- var sessionHistory = Components.classes["@mozilla.org/browser/shistory;1"]
- .createInstance(Components.interfaces.nsISHistory);
-
- window.XULBrowserWindow = new nsHelpStatusHandler();
-
- //Start the status handler.
- window.XULBrowserWindow.init();
-
- // Hook up UI through Progress Listener
- const interfaceRequestor = helpBrowser.docShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
- const webProgress = interfaceRequestor.getInterface(Components.interfaces.nsIWebProgress);
- webProgress.addProgressListener(window.XULBrowserWindow, Components.interfaces.nsIWebProgress.NOTIFY_ALL);
-
- //Always show the Table of Contents sidebar at startup.
- showPanel('help-toc');
-
- debug('END init()');
- }
-
- function loadHelpRDF() {
- debug('loadHelpRDF()');
-
- if (!helpFileDS) {
- try {
- helpFileDS = RDF.GetDataSourceBlocking(helpFileURI);
- }
- catch (e if (e.result == NSRESULT_RDF_SYNTAX_ERROR)) {
- log("Help file: " + helpFileURI + " contains a syntax error.");
- }
- catch (e) {
- log("Help file: " + helpFileURI + " was not found.");
- }
- try {
- helpWindow.setAttribute("title", getAttribute(helpFileDS, RDF_ROOT, NC_TITLE, ""));
- helpBaseURI = getAttribute(helpFileDS, RDF_ROOT, NC_BASE, helpBaseURI);
- defaultTopic = getAttribute(helpFileDS, RDF_ROOT, NC_DEFAULTTOPIC, "welcome");
-
- var panelDefs = helpFileDS.GetTarget(RDF_ROOT, NC_PANELLIST, true);
- RDFContainer.Init(helpFileDS, panelDefs);
- var iterator = RDFContainer.GetElements();
- while (iterator.hasMoreElements()) {
- var panelDef = iterator.getNext();
- var panelID = getAttribute(helpFileDS, panelDef, NC_PANELID, null);
-
- var datasources = getAttribute(helpFileDS, panelDef, NC_DATASOURCES, "rdf:none");
- datasources = normalizeLinks(helpBaseURI, datasources);
- // cache additional datsources to augment search datasources.
- if (panelID == "search") {
- emptySearchText = getAttribute(helpFileDS, panelDef, NC_EMPTY_SEARCH_TEXT, null) || "No search items found." ;
- emptySearchLink = getAttribute(helpFileDS, panelDef, NC_EMPTY_SEARCH_LINK, null) || "about:blank";
- searchDatasources = datasources;
- datasources = "rdf:null"; // but don't try to display them yet!
- }
-
- // cache toc datasources for use by ID lookup.
- var tree = document.getElementById("help-" + panelID + "-panel");
- loadDatabasesBlocking(datasources);
- tree.setAttribute("datasources", datasources);
- }
- }
- catch (e) {
- log(e + "");
- }
- }
- }
-
- function loadDatabasesBlocking(datasources) {
- var ds = datasources.split(/\s+/);
- for (var i=0; i < ds.length; ++i) {
- if (ds[i] == "rdf:null" || ds[i] == "")
- continue;
- try {
- // we need blocking here to ensure the database is loaded so getLink(topic) works.
- var datasource = RDF.GetDataSourceBlocking(ds[i]);
- }
- catch (e) {
- log("Datasource: " + ds[i] + " was not found.");
- }
- }
- }
-
- // prepend helpBaseURI to list of space separated links if the don't start with "chrome:"
- function normalizeLinks(helpBaseURI, links) {
- if (!helpBaseURI)
- return links;
- var ls = links.split(/\s+/);
- if (ls.length == 0)
- return links;
- for (var i=0; i < ls.length; ++i) {
- if (ls[i] == "")
- continue;
- if (ls[i].substr(0,7) != "chrome:" && ls[i].substr(0,4) != "rdf:")
- ls[i] = helpBaseURI + ls[i];
- }
- return ls.join(" ");
- }
-
- function getLink(ID) {
- if (!ID)
- return null;
- // Note resources are stored in fileURL#ID format.
- // We have one possible source for an ID for each datasource in the composite datasource.
- // The first ID which matches is returned.
- var tocTree = document.getElementById("help-toc-panel");
- var tocDS = tocTree.database;
- if (tocDS == null)
- return null;
- var tocDatasources = tocTree.getAttribute("datasources");
- var ds = tocDatasources.split(/\s+/);
- for (var i=0; i < ds.length; ++i) {
- if (ds[i] == "rdf:null" || ds[i] == "")
- continue;
- try {
- var rdfID = ds[i] + "#" + ID;
- var resource = RDF.GetResource(rdfID);
- if (resource) {
- var link = tocDS.GetTarget(resource, NC_LINK, true);
- if (link) {
- link = link.QueryInterface(Components.interfaces.nsIRDFLiteral);
- if (link)
- return link.Value;
- else
- return null;
- }
- }
- }
- catch (e) { log(rdfID + " " + e);}
- }
- return null;
- }
-
- // Called by contextHelp.js to determine if this window is displaying the requested help file.
- function getHelpFileURI() {
- return helpFileURI;
- }
-
-
- function getWebNavigation()
- {
- return helpBrowser.webNavigation;
- }
-
- function loadURI(uri)
- {
- if (uri.substr(0,7) != "chrome:")
- uri = helpBaseURI + uri;
- const nsIWebNavigation = Components.interfaces.nsIWebNavigation;
- var webNav=getWebNavigation();
- webNav.browserEngine="Gecko";
- webNav.loadURI(uri, nsIWebNavigation.LOAD_FLAGS_NONE, null, null, null);
- }
-
- function goBack()
- {
- var webNavigation = getWebNavigation();
- if (webNavigation.canGoBack)
- webNavigation.goBack();
- }
-
- function goForward()
- {
- var webNavigation = getWebNavigation();
- if (webNavigation.canGoForward)
- webNavigation.goForward();
- }
-
- function goHome() {
- // load "Welcome" page
- displayTopic(defaultTopic);
- }
-
- function print()
- {
- try {
- _content.print();
- } catch (e) {
- }
- }
-
- function deleteHistoryItems(aParent)
- {
- var children = aParent.childNodes;
- for (var i = 0; i < children.length; i++)
- {
- var index = children[i].getAttribute("index");
- if (index)
- aParent.removeChild(children[i]);
- }
- }
-
- function createMenuItem( aParent, aIndex, aLabel)
- {
- var menuitem = document.createElement( "menuitem" );
- menuitem.setAttribute( "label", aLabel );
- menuitem.setAttribute( "index", aIndex );
- aParent.appendChild( menuitem );
- }
-
- function createRadioMenuItem( aParent, aIndex, aLabel, aChecked)
- {
- var menuitem = document.createElement( "menuitem" );
- menuitem.setAttribute( "type", "radio" );
- menuitem.setAttribute( "label", aLabel );
- menuitem.setAttribute( "index", aIndex );
- if (aChecked==true)
- menuitem.setAttribute( "checked", "true" );
- aParent.appendChild( menuitem );
- }
-
- function FillHistoryMenu(aParent, aMenu)
- {
- // Remove old entries if any
- deleteHistoryItems(aParent);
-
- var sessionHistory = getWebNavigation().sessionHistory;
-
- var count = sessionHistory.count;
- var index = sessionHistory.index;
- var end;
- var j;
- var entry;
-
- switch (aMenu)
- {
- case "back":
- end = (index > MAX_HISTORY_MENU_ITEMS) ? index - MAX_HISTORY_MENU_ITEMS : 0;
- if ((index - 1) < end) return false;
- for (j = index - 1; j >= end; j--)
- {
- entry = sessionHistory.getEntryAtIndex(j, false);
- if (entry)
- createMenuItem(aParent, j, entry.title);
- }
- break;
- case "forward":
- end = ((count-index) > MAX_HISTORY_MENU_ITEMS) ? index + MAX_HISTORY_MENU_ITEMS : count;
- if ((index + 1) >= end) return false;
- for (j = index + 1; j < end; j++)
- {
- entry = sessionHistory.getEntryAtIndex(j, false);
- if (entry)
- createMenuItem(aParent, j, entry.title);
- }
- break;
- case "go":
- aParent.lastChild.hidden = (count == 0);
- end = count > MAX_HISTORY_MENU_ITEMS ? count - MAX_HISTORY_MENU_ITEMS : 0;
- for (j = count - 1; j >= end; j--)
- {
- entry = sessionHistory.getEntryAtIndex(j, false);
- if (entry)
- createRadioMenuItem(aParent, j, entry.title, j==index);
- }
- break;
- }
- return true;
- }
-
- function createBackMenu(event)
- {
- return FillHistoryMenu(event.target, "back");
- }
-
- function createForwardMenu(event)
- {
- return FillHistoryMenu(event.target, "forward");
- }
-
- function gotoHistoryIndex(aEvent)
- {
- var index = aEvent.target.getAttribute("index");
- if (!index)
- return false;
- try {
- getWebNavigation().gotoIndex(index);
- }
- catch(ex) {
- return false;
- }
- return true;
- }
-
- function nsHelpStatusHandler()
- {
- }
-
- nsHelpStatusHandler.prototype =
- {
- onStateChange : function(aWebProgress, aRequest, aStateFlags, aStatus)
- {
- const nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
-
- // Turn on the throbber.
- if (aStateFlags & nsIWebProgressListener.STATE_START)
- this.throbberElement.setAttribute("busy", "true");
- else if (aStateFlags & nsIWebProgressListener.STATE_STOP)
- this.throbberElement.removeAttribute("busy");
- },
- onStatusChange : function(aWebProgress, aRequest, aStateFlags, aStatus) {},
- onProgressChange : function(aWebProgress, aRequest, aCurSelfProgress,
- aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress) {},
- onSecurityChange : function(aWebProgress, aRequest, state) {},
- onLocationChange : function(aWebProgress, aRequest, aLocation)
- {
- UpdateBackForwardButtons();
- },
- QueryInterface : function(aIID)
- {
- if (aIID.equals(Components.interfaces.nsIWebProgressListener) ||
- aIID.equals(Components.interfaces.nsISupportsWeakReference) ||
- aIID.equals(Components.interfaces.nsIXULBrowserWindow) ||
- aIID.equals(Components.interfaces.nsISupports))
- return this;
- throw Components.results.NS_NOINTERFACE;
- },
-
- init : function()
- {
- this.throbberElement = document.getElementById("navigator-throbber");
- },
-
- destroy : function()
- {
- //this is needed to avoid memory leaks, see bug 60729
- this.throbberElement = null;
- },
-
- setJSStatus : function(status) {},
- setJSDefaultStatus : function(status) {},
- setOverLink : function(link) {}
- }
-
- function UpdateBackForwardButtons()
- {
- var backBroadcaster = document.getElementById("canGoBack");
- var forwardBroadcaster = document.getElementById("canGoForward");
- var webNavigation = getWebNavigation();
-
- // Avoid setting attributes on broadcasters if the value hasn't changed!
- // Remember, guys, setting attributes on elements is expensive! They
- // get inherited into anonymous content, broadcast to other widgets, etc.!
- // Don't do it if the value hasn't changed! - dwh
-
- var backDisabled = (backBroadcaster.getAttribute("disabled") == "true");
- var forwardDisabled = (forwardBroadcaster.getAttribute("disabled") == "true");
-
- if (backDisabled == webNavigation.canGoBack)
- backBroadcaster.setAttribute("disabled", !backDisabled);
-
- if (forwardDisabled == webNavigation.canGoForward)
- forwardBroadcaster.setAttribute("disabled", !forwardDisabled);
- }
-
- var gFindInstData;
- function getFindInstData()
- {
- if (!gFindInstData) {
- gFindInstData = new nsFindInstData();
- gFindInstData.browser = helpBrowser;
- // defaults for rootSearchWindow and currentSearchWindow are fine here
- }
- return gFindInstData;
- }
-
- function find(again, reverse)
- {
- if (again)
- findAgainInPage(getFindInstData(), reverse);
- else
- findInPage(getFindInstData())
- }
-
- function getMarkupDocumentViewer()
- {
- return helpBrowser.markupDocumentViewer;
- }
-
- //Show the selected sidebar panel
- function showPanel(panelId) {
- //hide other sidebar panels and show the panel name taken in from panelID.
- helpSearchPanel.setAttribute("hidden", "true");
- helpTocPanel.setAttribute("hidden", "true");
- helpIndexPanel.setAttribute("hidden", "true");
- helpGlossaryPanel.setAttribute("hidden", "true");
- var thePanel = document.getElementById(panelId + "-panel");
- thePanel.setAttribute("hidden","false");
-
- //remove the selected style from the previous panel selected.
- document.getElementById("help-glossary-btn").removeAttribute("selected");
- document.getElementById("help-index-btn").removeAttribute("selected");
- document.getElementById("help-search-btn").removeAttribute("selected");
- document.getElementById("help-toc-btn").removeAttribute("selected");
-
- //add the selected style to the correct panel.
- var theButton = document.getElementById(panelId + "-btn");
- theButton.setAttribute("selected", "true");
- }
-
- function onselect_loadURI(tree, columnName) {
- try {
- var row = tree.treeBoxObject.view.selection.currentIndex;
- var properties = Components.classes["@mozilla.org/supports-array;1"].createInstance(Components.interfaces.nsISupportsArray);
- tree.treeBoxObject.view.getCellProperties(row, columnName, properties);
- if (!properties) return;
- var uri = getPropertyValue(properties, "link-");
- if (uri)
- loadURI(uri);
- }
- catch (e) {}// when switching between tabs a spurious row number is returned.
- }
-
- /** Search properties nsISupportsArray for an nsIAtom which starts with the given property name. **/
- function getPropertyValue(properties, propName) {
- for (var i=0; i< properties.Count(); ++i) {
- var atom = properties.GetElementAt(i).QueryInterface(Components.interfaces.nsIAtom);
- var atomValue = atom.toString();
- if (atomValue.substr(0, propName.length) == propName)
- return atomValue.substr(propName.length);
- }
- return null;
- }
-
- function doFind() {
- var searchTree = document.getElementById("help-search-tree");
- var findText = document.getElementById("findText");
-
- // clear any previous results.
- clearDatabases(searchTree.database);
-
- // split search string into separate terms and compile into regexp's
- // MERC - JCH: Fix for getting rid of leading spaces bug
- RE = new Array();
- var aTemp = findText.value.split(/\s+/);
- for (var i=0; i < aTemp.length; ++i) {
- if (aTemp[i] == "")
- continue;
-
- var obj = new RegExp(aTemp[i], "i");
- RE.push(obj);
- }
-
- emptySearch = true;
- // search TOC
- var resultsDS = Components.classes["@mozilla.org/rdf/datasource;1?name=in-memory-datasource"].createInstance(Components.interfaces.nsIRDFDataSource);
- var tree = document.getElementById("help-toc-panel");
- var sourceDS = tree.database;
- doFindOnDatasource(resultsDS, sourceDS, RDF_ROOT, 0);
-
- // search additional search datasources
- if (searchDatasources != "rdf:null") {
- if (!searchDS)
- searchDS = loadCompositeDS(searchDatasources);
- doFindOnDatasource(resultsDS, searchDS, RDF_ROOT, 0);
- }
-
- // search index.
- tree = document.getElementById("help-index-panel");
- sourceDS = tree.database;
- if (!sourceDS) // If the index has never been displayed this will be null.
- sourceDS = loadCompositeDS(tree.datasources);
- doFindOnDatasource(resultsDS, sourceDS, RDF_ROOT, 0);
-
- // search glossary.
- tree = document.getElementById("help-glossary-panel");
- sourceDS = tree.database;
- if (!sourceDS) // If the glossary has never been displayed this will be null (sigh!).
- sourceDS = loadCompositeDS(tree.datasources);
- doFindOnDatasource(resultsDS, sourceDS, RDF_ROOT, 0);
-
- if (emptySearch)
- assertSearchEmpty(resultsDS);
- // Add the datasource to the search tree
- searchTree.database.AddDataSource(resultsDS);
- searchTree.builder.rebuild();
- }
-
- function doEnabling() {
- var findButton = document.getElementById("findButton");
- var findTextbox = document.getElementById("findText");
- findButton.disabled = !findTextbox.value;
- }
-
- function clearDatabases(compositeDataSource) {
- var enumDS = compositeDataSource.GetDataSources()
- while (enumDS.hasMoreElements()) {
- var ds = enumDS.getNext();
- compositeDataSource.RemoveDataSource(ds);
- }
- }
-
- function doFindOnDatasource(resultsDS, sourceDS, resource, level) {
- if (level > MAX_LEVEL) {
- try {
- log("Recursive reference to resource: " + resource.Value + ".");
- }
- catch (e) {
- log("Recursive reference to unknown resource.");
- }
- return;
- }
- // find all SUBHEADING children of current resource.
- var targets = sourceDS.GetTargets(resource, NC_SUBHEADINGS, true);
- while (targets.hasMoreElements()) {
- var target = targets.getNext();
- target = target.QueryInterface(Components.interfaces.nsIRDFResource);
- // The first child of a rdf:subheading should (must) be a rdf:seq.
- // Should we test for a SEQ here?
- doFindOnSeq(resultsDS, sourceDS, target, level+1);
- }
- }
-
- function doFindOnSeq(resultsDS, sourceDS, resource, level) {
- // load up an RDFContainer so we can access the contents of the current rdf:seq.
- RDFContainer.Init(sourceDS, resource);
- var targets = RDFContainer.GetElements();
- while (targets.hasMoreElements()) {
- var target = targets.getNext();
- target = target.QueryInterface(Components.interfaces.nsIRDFResource);
- var name = sourceDS.GetTarget(target, NC_NAME, true);
- name = name.QueryInterface(Components.interfaces.nsIRDFLiteral);
-
- if (isMatch(name.Value)) {
- // we have found a search entry - add it to the results datasource.
-
- // Get URL of html for this entry.
- var link = sourceDS.GetTarget(target, NC_LINK, true);
- link = link.QueryInterface(Components.interfaces.nsIRDFLiteral);
-
- urnID++;
- resultsDS.Assert(RDF_ROOT,
- RDF.GetResource("http://home.netscape.com/NC-rdf#child"),
- RDF.GetResource("urn:" + urnID),
- true);
- resultsDS.Assert(RDF.GetResource("urn:" + urnID),
- RDF.GetResource("http://home.netscape.com/NC-rdf#name"),
- name,
- true);
- resultsDS.Assert(RDF.GetResource("urn:" + urnID),
- RDF.GetResource("http://home.netscape.com/NC-rdf#link"),
- link,
- true);
- emptySearch = false;
-
- }
- // process any nested rdf:seq elements.
- doFindOnDatasource(resultsDS, sourceDS, target, level+1);
- }
- }
-
- function assertSearchEmpty(resultsDS) {
- var resSearchEmpty = RDF.GetResource("urn:emptySearch");
- resultsDS.Assert(RDF_ROOT,
- NC_CHILD,
- resSearchEmpty,
- true);
- resultsDS.Assert(resSearchEmpty,
- NC_NAME,
- RDF.GetLiteral(emptySearchText),
- true);
- resultsDS.Assert(resSearchEmpty,
- NC_LINK,
- RDF.GetLiteral(emptySearchLink),
- true);
- }
-
- function isMatch(text) {
- for (var i=0; i < RE.length; ++i ) {
- if (!RE[i].test(text))
- return false;
- }
- return true;
- }
-
- function loadCompositeDS(datasources) {
- // We can't search on each individual datasource's - only the aggregate (for each sidebar tab)
- // has the appropriate structure.
- var compositeDS = Components.classes["@mozilla.org/rdf/datasource;1?name=composite-datasource"]
- .createInstance(Components.interfaces.nsIRDFCompositeDataSource);
-
- var ds = datasources.split(/\s+/);
- for (var i=0; i < ds.length; ++i) {
- if (ds[i] == "rdf:null" || ds[i] == "")
- continue;
- try {
- // we need blocking here to ensure the database is loaded.
- var sourceDS = RDF.GetDataSourceBlocking(ds[i]);
- compositeDS.AddDataSource(sourceDS);
- }
- catch (e) {
- log("Datasource: " + ds[i] + " was not found.");
- }
- }
- return compositeDS;
- }
-
- function getAttribute(datasource, resource, attributeResourceName, defaultValue) {
- var literal = datasource.GetTarget(resource, attributeResourceName, true);
- if (!literal)
- return defaultValue;
- return getLiteralValue(literal, defaultValue);
- }
-
- function getLiteralValue(literal, defaultValue) {
- if (literal) {
- literal = literal.QueryInterface(Components.interfaces.nsIRDFLiteral);
- if (literal)
- return literal.Value;
- }
- if (defaultValue)
- return defaultValue;
- return null;
- }
- // Write debug string to javascript console.
- function log(aText) {
- CONSOLE_SERVICE.logStringMessage(aText);
- }
-
-
- //INDEX OPENING FUNCTION -- called in oncommand for index pane
- // iterate over all the items in the outliner;
- // open the ones at the top-level (i.e., expose the headings underneath
- // the letters in the list.
- function displayIndex() {
- var treeview = helpIndexPanel.view;
- var i = treeview.rowCount;
- while (i--)
- if (!treeview.getLevel(i) && !treeview.isContainerOpen(i))
- treeview.toggleOpenState(i);
- }
-
- // Shows the panel relative to the currently selected panel.
- // Takes a boolean parameter - if true it will show the next panel,
- // otherwise it will show the previous panel.
- function showRelativePanel(goForward) {
- var selectedIndex = -1;
- var sidebarBox = document.getElementById("helpsidebar-box");
- var sidebarButtons = new Array();
- for (var i = 0; i < sidebarBox.childNodes.length; i++) {
- var btn = sidebarBox.childNodes[i];
- if (btn.nodeName == "button") {
- if (btn.getAttribute("selected") == "true")
- selectedIndex = sidebarButtons.length;
- sidebarButtons.push(btn);
- }
- }
- if (selectedIndex == -1)
- return;
- selectedIndex += goForward ? 1 : -1;
- if (selectedIndex >= sidebarButtons.length)
- selectedIndex = 0;
- else if (selectedIndex < 0)
- selectedIndex = sidebarButtons.length - 1;
- sidebarButtons[selectedIndex].doCommand();
- }
-
- /**
- * Print debug output to the console window
- **/
- function debug(msg) {
- dump('help.js: '+msg+'\n');
- }
-