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PC World 2007 March
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chrome
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help.jar
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help.js
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2005-06-21
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801 lines
var helpBrowser;
var helpWindow;
var helpSearchPanel;
var emptySearch;
var emptySearchText
var emptySearchLink
var helpTocPanel;
var helpIndexPanel;
var helpGlossaryPanel;
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.
const MAX_HISTORY_MENU_ITEMS = 6;
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().QueryInterface(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);
var urnID = 0;
var RE;
var helpFileURI;
var helpFileDS;
var helpBaseURI;
const defaultHelpFile = "chrome://help/locale/help.rdf";
const defaultTopic = "use-help";
var searchDatasources = "rdf:null";
var searchDS = null;
const NSRESULT_RDF_SYNTAX_ERROR = 0x804e03f7;
function displayTopic(topic) {
// Get the page to open.
var uri = getLink(topic);
// Use default topic if specified topic is not found.
if (!uri) {
uri = getLink(defaultTopic);
}
// Load the page.
loadURI(uri);
}
function 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 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);
// trailing "/" included.
helpBaseURI = helpFileURI.substring(0, helpFileURI.lastIndexOf("/")+1);
helpTopic = window.arguments[0].GetString(1);
}
loadHelpRDF();
displayTopic(helpTopic);
// Move to Center of Screen
const width = document.documentElement.getAttribute("width");
const height = document.documentElement.getAttribute("height");
window.moveTo((screen.availWidth - width) / 2, (screen.availHeight - height) / 2);
// Initialize history.
getWebNavigation().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);
//Display the Table of Contents
showPanel("help-toc");
// initialize the customizeDone method on the customizeable toolbar
var toolbox = document.getElementById("help-toolbox");
toolbox.customizeDone = ToolboxCustomizeDone;
var toolbarset = document.getElementById("customToolbars");
toolbox.toolbarset = toolbarset;
// Set the text of the sidebar toolbar button to "Hide Sidebar" taken the properties file.
// This is needed so that it says "Toggle Sidebar" in toolbar customization, but outside
// of it, it says either "Show Sidebar" or "Hide Sidebar".
document.getElementById("help-sidebar-button").label =
document.getElementById("bundle_help").getString("hideSidebarLabel");
}
function 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 Datasources 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;
// Don't try to display them yet!
datasources = "rdf:null";
}
// 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.");
}
}
}
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;
}
function getHelpFileURI() {
return helpFileURI;
}
function getBrowser() {
return helpBrowser;
}
function getWebNavigation() {
try {
return helpBrowser.webNavigation;
} catch (e)
{
return null;
}
}
function loadURI(uri) {
if (uri.substr(0,7) != "chrome:") {
uri = helpBaseURI + uri;
}
getWebNavigation().loadURI(uri, Components.interfaces.nsIWebNavigation.LOAD_FLAGS_NONE,
null, null, null);
}
function goBack() {
try
{
getWebNavigation().goBack();
} catch (e)
{
}
}
/* copied from browser.js */
function BrowserReloadWithFlags(reloadFlags) {
/* First, we'll try to use the session history object to reload so
* that framesets are handled properly. If we're in a special
* window (such as view-source) that has no session history, fall
* back on using the web navigation's reload method.
*/
var webNav = getWebNavigation();
try {
var sh = webNav.sessionHistory;
if (sh)
webNav = sh.QueryInterface(Components.interfaces.nsIWebNavigation);
} catch (e) {
}
try {
webNav.reload(reloadFlags);
} catch (e) {
}
}
function reload() {
const reloadFlags = Components.interfaces.nsIWebNavigation.LOAD_FLAGS_NONE;
return BrowserReloadWithFlags(reloadFlags);
}
function goForward() {
try
{
getWebNavigation().goForward();
} catch(e)
{
}
}
function goHome() {
// Load "Welcome" page
//loadURI("chrome://help/locale/firefox_welcome.xhtml");
loadURI("chrome://help/locale/welcome.xhtml");
}
function print() {
try {
_content.print();
} catch (e) {
}
}
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;
}
return true;
}
function createMenuItem( aParent, aIndex, aLabel)
{
var menuitem = document.createElement( "menuitem" );
menuitem.setAttribute( "label", aLabel );
menuitem.setAttribute( "index", aIndex );
aParent.appendChild( menuitem );
}
function deleteHistoryItems(aParent)
{
var children = aParent.childNodes;
for (var i = children.length - 1; i >= 0; --i)
{
var index = children[i].getAttribute("index");
if (index)
aParent.removeChild(children[i]);
}
}
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() {
this.init();
}
nsHelpStatusHandler.prototype = {
onStateChange : function(aWebProgress, aRequest, aStateFlags, aStatus)
{
const nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
if (aStateFlags & nsIWebProgressListener.STATE_START) {
if (this.throbberElement)
this.throbberElement.setAttribute("busy", "true");
} else if (aStateFlags & nsIWebProgressListener.STATE_STOP) {
if (aRequest && this.throbberElement) {
this.throbberElement.removeAttribute("busy");
}
}
},
onProgressChange : function(aWebProgress, aRequest, aCurSelfProgress,
aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress) {},
onStatusChange : function(aWebProgress, aRequest, aStatus, aMessage) {},
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("help-throbber");
},
destroy : function()
{
//this 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) {
if (backDisabled)
backBroadcaster.removeAttribute("disabled");
else
backBroadcaster.setAttribute("disabled", true);
}
if (forwardDisabled == webNavigation.canGoForward) {
if (forwardDisabled)
forwardBroadcaster.removeAttribute("disabled");
else
forwardBroadcaster.setAttribute("disabled", true);
}
}
function getMarkupDocumentViewer() {
return helpBrowser.markupDocumentViewer;
}
function showPanel(panelId) {
//hide other sidebar panels and show the panel name taken in.
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.
var theButton = document.getElementById(panelId + "-btn");
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.
theButton.setAttribute("selected", "true");
//focus the searchbox if the search sidebar panel is shown.
if (panelId == "help-search")
document.getElementById("findText").focus();
}
function findParentNode(node, parentNode)
{
if (node && node.nodeType == Node.TEXT_NODE) {
node = node.parentNode;
}
while (node) {
var nodeName = node.localName;
if (!nodeName)
return null;
nodeName = nodeName.toLowerCase();
if (nodeName == "body" || nodeName == "html" ||
nodeName == "#document") {
return null;
}
if (nodeName == parentNode)
return node;
node = node.parentNode;
}
return null;
}
function onselect_loadURI(tree) {
try {
var resource = tree.view.getResourceAtIndex(tree.currentIndex);
var link = tree.database.GetTarget(resource, NC_LINK, true);
if (link) {
link = link.QueryInterface(Components.interfaces.nsIRDFLiteral);
loadURI(link.Value);
}
} catch (e) {
}// when switching between tabs a spurious row number is returned.
}
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
RE = findText.value.split(/\s+/);
for (var i=0; i < RE.length; ++i) {
if (RE[i] == "")
continue;
RE[i] = new RegExp(RE[i], "i");
}
emptySearch = true;
// search TOC
var resultsDS = Components.classes["@mozilla.org/rdf/datasource;1?name=in-memory-datasource"]
.createInstance(Components.interfaces.nsIRDFDataSource);
var tree = helpTocPanel;
var sourceDS = tree.database;
doFindOnDatasource(resultsDS, sourceDS, RDF_ROOT, 0);
// search glossary.
tree = helpGlossaryPanel;
sourceDS = tree.database;
// If the glossary has never been displayed this will be null (sigh!).
if (!sourceDS)
sourceDS = loadCompositeDS(tree.datasources);
doFindOnDatasource(resultsDS, sourceDS, RDF_ROOT, 0);
// search index
tree = helpIndexPanel;
sourceDS = tree.database;
//If the index has never been displayed this will be null
if (!sourceDS)
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) {
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;
}
function log(aText) {
CONSOLE_SERVICE.logStringMessage(aText);
}
function expandAllIndexEntries() {
var treeview = helpIndexPanel.view;
var i = treeview.rowCount;
while (i--) {
if (!treeview.getLevel(i) && !treeview.isContainerOpen(i)) {
treeview.toggleOpenState(i);
}
}
}
function toggleSidebar()
{
var sidebar = document.getElementById("helpsidebar-box");
var separator = document.getElementById("helpsidebar-splitter");
var sidebarButton = document.getElementById("help-sidebar-button");
//Use the string bundle to retrieve the text "Hide Sidebar"
//and "Show Sidebar" from the locale directory.
var strBundle = document.getElementById("bundle_help");
if (sidebar.hidden) {
sidebar.removeAttribute("hidden");
sidebarButton.label = strBundle.getString("hideSidebarLabel");
separator.removeAttribute("hidden");
} else {
sidebar.setAttribute("hidden","true");
sidebarButton.label = strBundle.getString("showSidebarLabel");
separator.setAttribute("hidden","true");
}
}
// 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 == "toolbarbutton") {
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();
}