/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

var	rootNode = null;
var	textArc = null;
var	modeArc = null;
var	RDF_observer = new Object;
var	pref = null;



function debug(msg)
{
	// uncomment for debugging information
	// dump(msg+"\n");
}



// get the click count pref
try
{
	pref = Components.classes["component://netscape/preferences"];
	if (pref)	pref = pref.getService();
	if (pref)	pref = pref.QueryInterface(Components.interfaces.nsIPref);
}
catch(e)
{
	debug("Exception " + e + " trying to get prefs.\n");
}



RDF_observer =
{
	OnAssert   : function(src, prop, target)
		{
			if ((src == rootNode) && (prop == textArc))
			{
				rememberSearchText(target);
			}
			else if ((src == rootNode) && (prop == modeArc))
			{
				updateSearchMode();
			}
		},
	OnUnassert : function(src, prop, target)
		{
		},
	OnChange   : function(src, prop, old_target, new_target)
		{
			if ((src == rootNode) && (prop == textArc))
			{
				rememberSearchText(new_target);
			}
			else if ((src == rootNode) && (prop == modeArc))
			{
				updateSearchMode();
			}
		},
	OnMove     : function(old_src, new_src, prop, target)
		{
		}
}



function rememberSearchText(target)
{
	if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
	if (target)	target = target.Value;
	if (target && (target != ""))
	{
		var textNode = document.getElementById("sidebar-search-text");
		if (!textNode)	return(false);

		// convert pluses (+) back to spaces
		target = target.replace(/+/i, " ");

		textNode.value = unescape(target);
	}
	// show the results tab
	switchTab(0);
}



function updateSearchMode()
{
	var searchMode = 0;
	try
	{
		if (pref)	searchMode = pref.GetIntPref("browser.search.mode");

		var categoryBox = document.getElementById("categoryBox");
		if (categoryBox)
		{
			if (searchMode == 0)
			{
				categoryBox.setAttribute("collapsed", "true");
				switchTab(0);
			}
			else
			{
				categoryBox.removeAttribute("collapsed");
				switchTab(1);
			}
		}
	}
	catch(ex)
	{
	}
	return(searchMode);
}



// Initialize the Search panel: 
// 1) init the category list
// 2) load the search engines associated with this category
// 3) initialise the checked state of said engines. 
function SearchPanelStartup()
{
	bundle = srGetStrBundle( "chrome://communicator/locale/search/search-panel.properties" );

	var tree = document.getElementById("Tree");
	if (tree)
	{
		var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
		if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
		if (rdf)
		{
			rootNode = rdf.GetResource("NC:LastSearchRoot", true);
			textArc = rdf.GetResource("http://home.netscape.com/NC-rdf#LastText", true);
			modeArc = rdf.GetResource("http://home.netscape.com/NC-rdf#SearchMode", true);
			tree.database.AddObserver(RDF_observer);
		}
	}

	var internetSearch = Components.classes["component://netscape/rdf/datasource?name=internetsearch"].getService();
	if (internetSearch)	internetSearch = internetSearch.QueryInterface(Components.interfaces.nsIInternetSearchService);
	if (internetSearch)
	{
		var catDS = internetSearch.GetCategoryDataSource();
		if (catDS)	catDS = catDS.QueryInterface(Components.interfaces.nsIRDFDataSource);
		if (catDS)
		{
			var categoryList = document.getElementById("categoryList");
			if (categoryList)
			{
				categoryList.database.AddDataSource(catDS);
				var ref = categoryList.getAttribute("ref");
				if (ref)	categoryList.setAttribute("ref", ref);
			}
			var engineTree = document.getElementById("searchengines");
			if (engineTree)
			{
				engineTree.database.AddDataSource(catDS);
				var ref = engineTree.getAttribute("ref");
				if (ref)	engineTree.setAttribute("ref", ref);
			}
		}
	}

	// try and determine last category name used
	var lastCategoryName = "";
	try
	{
		if (pref)	lastCategoryName = pref.CopyCharPref( "browser.search.last_search_category" );

		if (lastCategoryName != "")
		{
			// strip off the prefix if necessary
			var prefix="NC:SearchCategory?category=";
			if (lastCategoryName.indexOf(prefix) == 0)
			{
				lastCategoryName = lastCategoryName.substr(prefix.length);
			}
		}

	}
	catch( e )
	{
		debug("Exception in SearchPanelStartup\n");
		lastCategoryName = "";
	}
	debug("\nSearchPanelStartup: lastCategoryName = '" + lastCategoryName + "'\n");

	// select the appropriate category
	var categoryList = document.getElementById( "categoryList" );
	var categoryPopup = document.getElementById( "categoryPopup" );
	if( categoryList && categoryPopup )
	{
		//set to default value 'Web'
		//hack: hardcoded postion in here replace with a function that finds the entry 'the web'
	 
	 	var found = false;
		for( var i = 0; i < categoryPopup.childNodes.length; i++ )
		{
			if( ( lastCategoryName == "" && categoryPopup.childNodes[i].getAttribute("data") == "NC:SearchEngineRoot" ) ||
			    ( categoryPopup.childNodes[i].getAttribute("id") == lastCategoryName ) )
			{
				categoryList.selectedItem = categoryPopup.childNodes[i];
				found = true;
				break;
			}
		}
		if (found == false)
		{
			categoryList.selectedItem = categoryPopup.childNodes[0];
		}
    
		if (( lastCategoryName == "" ) || (lastCategoryName == null))
		{
			lastCategoryName = "NC:SearchEngineRoot";
		}
		if (lastCategoryName != "NC:SearchEngineRoot")
		{
			lastCategoryName = "NC:SearchCategory?category=" + lastCategoryName;
		}

		var treeNode = document.getElementById("searchengines");
		treeNode.setAttribute( "ref", lastCategoryName );
	}

	loadEngines( lastCategoryName );

	var searchMode = updateSearchMode();
	// if we have search results, show them, otherwise show engines
	if ((haveSearchResults() == true) || (searchMode == 0))
	{
		switchTab(0);
	}
	else
	{
		switchTab(1);
	}
}



function haveSearchResults()
{
	var resultsTree = document.getElementById("Tree");
	if( !resultsTree)	return(false);
	var ds = resultsTree.database;
	if (!ds)		return(false);

	var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
	if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
	if (rdf)
	{
		var source = rdf.GetResource( "NC:LastSearchRoot", true);
		var childProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#LastText", true);
		var target = ds.GetTarget(source, childProperty, true);
		if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
		if (target)	target = target.Value;
		if (target && target != "")
		{
			var textNode = document.getElementById("sidebar-search-text");
			if (!textNode)	return(false);

			// convert pluses (+) back to spaces
			target = target.replace(/+/i, " ");

			textNode.value = unescape(target);
			return(true);
		}
	}
	return(false);
}



function getNumEngines()
{
 	var treeNode = document.getElementById("searchengines");
	var numChildren = treeNode.childNodes.length;
	var treeChildrenNode = null;

	for (var x = 0; x<numChildren; x++)
 	{
		if (treeNode.childNodes[x].tagName == "treechildren")
		{
			treeChildrenNode = treeNode.childNodes[x];
 			break;
		}
	}
	if( !treeChildrenNode )	return(-1);
	return(treeChildrenNode.childNodes.length);
}



function chooseCategory( aNode )
{
	var category = aNode.getAttribute("id");
	if ((!category) || (category == ""))
	{
		category="NC:SearchEngineRoot";
	}
	else
	{
		category = "NC:SearchCategory?category=" + category;
	}
	debug("chooseCategory: '" + category + "'\n");

	if (pref)	pref.SetCharPref( "browser.search.last_search_category", category );
	else		debug("Unable to set browser.search.last_search_category pref.\n");

	var treeNode = document.getElementById("searchengines");
	if (treeNode)
	{
		treeNode.setAttribute( "ref", category );
	}
	loadEngines( category );
	return(true);
}



// check an engine representation in the engine list
function doCheck(aNode)
{
	saveEngines();
	return(false);
}



function saveEngines()
{
	var categoryList = document.getElementById("categoryList");
	var category = categoryList.selectedItem.getAttribute("id");
	if( category )
	{
		category = "NC:SearchCategory?category=" + category;
	}
	else
	{
		category = "NC:SearchEngineRoot";
	}

	var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
	if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
	if (rdf)
	{
		var localStore = rdf.GetDataSource("rdf:local-store");
		if( !localStore )	return(false);

   	var engineBox = document.getElementById("searchengines");
    if( !engineBox )
      return false;
    var checkedProperty = rdf.GetResource( "http://home.netscape.com/NC-rdf#checked", true );
    var categorySRC = rdf.GetResource( category, true );
    for (var x = 0; x < engineBox.childNodes.length; x++)
    {
      var checkbox = engineBox.childNodes[x];
      if( !checkbox )
      	continue;
      var engineURI = checkbox.getAttribute("id");
      var engineSRC = rdf.GetResource(engineURI, true);

      if( checkbox.checked == true || checkbox.checked == "true")
        localStore.Assert( categorySRC, checkedProperty, engineSRC, true );
      else
        localStore.Unassert( categorySRC, checkedProperty, engineSRC, true );
    }

	// save changes; flush out the localstore
	try
	{
		var flushableStore = localStore.QueryInterface(Components.interfaces.nsIRDFRemoteDataSource);
		if (flushableStore)	flushableStore.Flush();
	}
	catch(ex)
	{
	}
  }
}



// initialise the appropriate engine list, and the checked state of the engines
function loadEngines( aCategory )
{
  var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
  if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
  if (rdf)
  {
  	var localStore = rdf.GetDataSource("rdf:local-store");
  	if (localStore)
  	{
  		var engineBox = document.getElementById("searchengines");
  		if( engineBox )
  		{
  			var numEngines = engineBox.childNodes.length;
  			var checkedProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#checked", true);
        var categorySRC = rdf.GetResource( aCategory, true );
  			for (var x = 0; x<numEngines; x++)
  			{
  				var checkbox = engineBox.childNodes[x];
  				if (!checkbox) continue;
  				var engineURI = checkbox.getAttribute("id");
  				var engineSRC = rdf.GetResource( engineURI, true );
  				var hasAssertion = localStore.HasAssertion( categorySRC, checkedProperty, engineSRC, true );
  				if ( hasAssertion == true)
  					checkbox.checked = true;
  			}
  		}
  	}
  }
}



function SearchPanelShutdown()
{
	var tree = document.getElementById("Tree");
	if (tree)
	{
		tree.database.RemoveObserver(RDF_observer);
	}
}



function doStop()
{
	// should stop button press also stop the load of the page in the browser? I think so. 
	var progressNode = parent.document.getElementById("statusbar-icon");
	var stopButtonNode = document.getElementById("stopbutton");
	var searchButtonNode = document.getElementById("searchbutton");
	if(progressNode && stopButtonNode && searchButtonNode )
	{
		progressNode.setAttribute("mode", "normal");
		stopButtonNode.setAttribute("style", "display: none;");
		searchButtonNode.setAttribute("style", "display: inherit;");
	}

	// stop any network connections
	var isupports = Components.classes["component://netscape/rdf/datasource?name=internetsearch"].getService();
	if (isupports)
	{
		var internetSearchService = isupports.QueryInterface(Components.interfaces.nsIInternetSearchService);
		if (internetSearchService)
			internetSearchService.Stop();
	}

	// get various services
	var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
	if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);

	var internetSearch = Components.classes["component://netscape/rdf/datasource?name=internetsearch"].getService();
	if (internetSearch)	internetSearch = internetSearch.QueryInterface(Components.interfaces.nsIRDFDataSource);

	var sortSetFlag = false;

	// show appropriate column(s)
	if ((rdf) && (internetSearch))
	{
		var resultsTree = top.content.document.getElementById("internetresultstree");
		if( !resultsTree )
			return(false);
		var searchURL = resultsTree.getAttribute("ref");
		if( !searchURL )	
			return(false);

		var searchResource       = rdf.GetResource(searchURL, true);
		var priceProperty        = rdf.GetResource("http://home.netscape.com/NC-rdf#Price", true);
		var availabilityProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#Availability", true);
		var relevanceProperty    = rdf.GetResource("http://home.netscape.com/NC-rdf#Relevance", true);
		var dateProperty         = rdf.GetResource("http://home.netscape.com/NC-rdf#Date", true);
		var trueProperty         = rdf.GetLiteral("true");

		var hasPriceFlag         = internetSearch.HasAssertion(searchResource, priceProperty, trueProperty, true);
		var hasAvailabilityFlag  = internetSearch.HasAssertion(searchResource, availabilityProperty, trueProperty, true);
		var hasRelevanceFlag     = internetSearch.HasAssertion(searchResource, relevanceProperty, trueProperty, true);
		var hasDateFlag          = internetSearch.HasAssertion(searchResource, dateProperty, trueProperty, true);

		if(hasPriceFlag == true)
		{
			var colNode = top.content.document.getElementById("PriceColumn");
			if (colNode)
			{
				colNode.removeAttribute("style", "width: 0; visibility: collapse;");
				if (sortSetFlag == false)
				{
					top.content.setInitialSort(colNode, "ascending");
					sortSetFlag = true;
				}
			}
		}
		if (hasAvailabilityFlag == true)
		{
			colNode = top.content.document.getElementById("AvailabilityColumn");
			if (colNode)
				colNode.removeAttribute("style", "width: 0; visibility: collapse;");
		}
		if (hasDateFlag == true)
		{
			colNode = top.content.document.getElementById("DateColumn");
			if (colNode)
				colNode.removeAttribute("style", "width: 0; visibility: collapse;");
		}
		if (hasRelevanceFlag == true)
		{
			colNode = top.content.document.getElementById("RelevanceColumn");
			if (colNode)
			{
				colNode.removeAttribute("style", "width: 0; visibility: collapse;");
				if (sortSetFlag == false)
				{
					top.content.setInitialSort(colNode, "descending");
					sortSetFlag = true;
				}
			}
		}
	}

	if (sortSetFlag == false)
	{
		colNode = top.content.document.getElementById("PageRankColumn");
		if (colNode)
			top.content.setInitialSort(colNode, "ascending");
	}
	switchTab(0);
}



function doSearch()
{
   var searchButton = document.getElementById("searchbutton");      
   if ( searchButton.getAttribute("disabled") )
	{	   
	   var sidebarSearchText = document.getElementById("sidebar-search-text");
	   sidebarSearchText.focus();
	   return;
	}

	//get click count pref for later
	//and set tree attribute to cause proper results appearance (like links) to happen 
	//when user set pref to single click
	
  try {
    if( pref ) {
      var prefvalue = pref.GetBoolPref( "browser.search.use_double_clicks" );
      var mClickCount = prefvalue ? 2 : 1;
    } 
    else
      mClickCount = 1;
  }
  catch(e) {
    mClickCount = 1;
  }
  var tree = document.getElementById("Tree");
  if (mClickCount == 1)
    tree.setAttribute("singleclick","true");
  else
    tree.removeAttribute("singleclick");

	//end insert for single click appearance
	
	// hide search button
	var searchButtonNode = document.getElementById("searchbutton");
	var stopButtonNode = document.getElementById("stopbutton");
	var progressNode = top.document.getElementById("statusbar-icon");
	if( !stopButtonNode || !searchButtonNode  )
    return;
  
	// hide various columns
  if( parent.content.isMozillaSearchWindow ) {
  	colNode = parent.content.document.getElementById("RelevanceColumn");
  	if (colNode)	colNode.setAttribute("style", "width: 0; visibility: collapse;");
	  colNode = parent.content.document.getElementById("PriceColumn");
  	if (colNode)	colNode.setAttribute("style", "width: 0; visibility: collapse;");
	  colNode = parent.content.document.getElementById("AvailabilityColumn");
  	if (colNode)	colNode.setAttribute("style", "width: 0; visibility: collapse;");
  }

	// get user text to find
	var textNode = document.getElementById("sidebar-search-text");
	if( !textNode )	
    return false;
	if ( !textNode.value )
	{
    alert( bundle.GetStringFromName("enterstringandlocation") );
		return false;
	}
	// get selected search engines
	var engineBox = document.getElementById("searchengines");
	if (!engineBox)	return(false);

	var searchURL   = "";
	var foundEngine = false;
  var engineURIs  = [];

	for (var x = 0; x<engineBox.childNodes.length; x++)
	{
		var checkbox = engineBox.childNodes[x];
		if (!checkbox)
			continue;

		if ( checkbox.checked == true || checkbox.checked == "true")
		{
			var engineURI = checkbox.getAttribute("id");
			if (!engineURI)	continue;
			engineURIs[engineURIs.length] = engineURI;
			foundEngine = true;
		}
	}
	if (foundEngine == false)
	{
    if( getNumEngines() == 1 ) {
      // only one engine in this category, check it
      var checkbox = engineBox.firstChild;
      engineURIs[engineURIs.length] = checkbox.getAttribute( "id" );
    }
    else {
      debug("*** multiple search engines present, selecting the netscape search engine\n");
      for( var i = 0; i < engineBox.childNodes.length; i++ )
      {
        var checkbox = engineBox.childNodes[i];
        debug("*** the current URI is = " + checkbox.getAttribute("id") + "\n");
        if( checkbox.getAttribute("id").indexOf("NetscapeSearch.src") != -1 ) {
          engineURIs[engineURIs.length] = checkbox.getAttribute("id");
          break;
        }
      }
    }
	}

  progressNode.setAttribute( "mode", "undetermined" );
  searchButtonNode.setAttribute("style", "display: none;");
  stopButtonNode.removeAttribute("style", "display: none;");
    
  // run the search
	OpenSearch("internet", false, textNode.value, engineURIs );
	switchTab(0);
	return true;
}



function checkSearchProgress( aSearchURL )
{
	var	activeSearchFlag = false;
	var	resultsTree = top.content.document.getElementById("internetresultstree");
	var	enginesBox = top.content.document.getElementById("engineTabs");
	if( !resultsTree || !enginesBox )
	{	
		doStop();
		return (activeSearchFlag);
	}
	var treeref = resultsTree.getAttribute("ref");

	if( aSearchURL )
	{
		resultsTree.setAttribute( "ref", aSearchURL );
		treeref = aSearchURL;
	}

	var ds = resultsTree.database;
	if ( treeref && ds )
	{
		try
		{
			var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
			if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
			if (rdf)
			{
				var source = rdf.GetResource( treeref, true);
				var loadingProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#loading", true);
				var target = ds.GetTarget(source, loadingProperty, true);
				if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
				if (target)	target = target.Value;
				if (target == "true")
					activeSearchFlag = true;
			}
		}
		catch(ex)
		{
		}
	}
	if( activeSearchFlag )
	{
		setTimeout("checkSearchProgress(null)", 1000);
	}
	else
	{
		//window.frames["sidebar-content"].doStop();
		doStop();
	}
  
	return(activeSearchFlag);
}



function FOO_doSearch()
{
	var textNode = document.getElementById("sidebar-search-text");
	if (!textNode)	return(false);
	var text = textNode.value;
	top.OpenSearch("internet", false, text);
	return(true);
}



function sidebarOpenURL(event, treeitem, root)
{
  try {
    if( pref ) {
      var prefvalue = pref.GetBoolPref( "browser.search.use_double_clicks" );
      mClickCount = prefvalue ? 2 : 1;
    } 
    else
      mClickCount = 1;
  }
  catch(e) {
    mClickCount = 1;
  } 
  
  if ((event.button != 1) || (event.detail != mClickCount))
		return(false);

	if (treeitem.getAttribute("container") == "true")
		return(false);

	if (treeitem.getAttribute("type") == "http://home.netscape.com/NC-rdf#BookmarkSeparator")
		return(false);

	var id = treeitem.getAttribute('id');
	if (!id)
		return(false);

	// rjc: add support for anonymous resources; if the node has
	// a "#URL" property, use it, otherwise default to using the id
	try
	{
		var theRootNode = document.getElementById(root);
		var ds = null;
		if (rootNode)
		{
			ds = theRootNode.database;
		}
		var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
		if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
		if (rdf)
		{
			if (ds)
			{
				var src = rdf.GetResource(id, true);
				var prop = rdf.GetResource("http://home.netscape.com/NC-rdf#URL", true);
				var target = ds.GetTarget(src, prop, true);
				if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
				if (target)	target = target.Value;
				if (target)	id = target;
			}
		}
	}
	catch(ex)
	{
	}

  if ( window.content )
    window.content.location = id;
  else {
    window.openDialog( getBrowserURL(), "_blank", "chrome,all,dialog=no", id );
  }
}



// this should go somewhere else. 
function OpenSearch( tabName, forceDialogFlag, aSearchStr, engineURIs )
{
	var searchMode = 0;
	var searchEngineURI = null;
	var autoOpenSearchPanel = false;
	var defaultSearchURL = null;

	try
	{
    if( pref ) {
  		searchMode = pref.GetIntPref("browser.search.powermode");
	  	autoOpenSearchPanel = pref.GetBoolPref("browser.search.opensidebarsearchpanel");
      if( !engineURIs )
  		  searchEngineURI = pref.CopyCharPref("browser.search.defaultengine");
  		defaultSearchURL = pref.CopyCharPref("browser.search.defaulturl");
    }
	}
	catch(ex)
	{
	}
	
	if ( !defaultSearchURL )
		defaultSearchURL = "http://search.netscape.com/cgi-bin/search?search=";

	if( searchMode == 1 || forceDialogFlag )
	{
		// Use a single search dialog
    var windowManager = getService( "component://netscape/rdf/datasource?name=window-mediator", "nsIWindowMediator" );
		var searchWindow = windowManager.getMostRecentWindow("search:window");
		if (searchWindow)
		{
			searchWindow.focus();
			if( searchWindow.loadPage )	
        searchWindow.loadPage( tabName, searchStr );
		}
		else
			top.openDialog("chrome://communicator/content/search/search.xul", "SearchWindow", "dialog=no,close,chrome,resizable", tabName, searchStr);
	}
	else
	{
    var searchDS = Components.classes["component://netscape/rdf/datasource?name=internetsearch"].getService();
    if( searchDS )
      searchDS = searchDS.QueryInterface( Components.interfaces.nsIInternetSearchService );
  	if( searchDS )
		{
  	  if( !aSearchStr ) 
        return false;
    	var	escapedSearchStr = escape( aSearchStr );
			searchDS.RememberLastSearchText( escapedSearchStr );
  		try
  		{
        if( !engineURIs || ( engineURIs && engineURIs.length <= 1 ) ) {
          // not called from sidebar or only one engine selected
          if( engineURIs )
          {
            searchEngineURI = engineURIs[0];
            gURL = "internetsearch:engine=" + searchEngineURI + "&text=" + escapedSearchStr;
          }
          // look up the correct search URL format for the given engine
          var	searchURL = searchDS.GetInternetSearchURL( searchEngineURI, escapedSearchStr );
          if( searchURL )
          {
            defaultSearchURL = searchURL;
          }
          else 
          {
            defaultSearchURL = defaultSearchURL + escapedSearchStr;
            gURL = "";
          }
          // load the results page of selected or default engine in the content area
          if( defaultSearchURL )
            top.content.location.href = defaultSearchURL;
        }
        else {
          // multiple providers
          searchURL = "";
          for( var i = 0; i < engineURIs.length; i++ ) 
          {
            if( searchURL == "" )
              searchURL = "internetsearch:";
            else
              searchURL += "&";
            searchURL += "engine=" + engineURIs[i];
          }
          searchURL += ( "&text=" + escapedSearchStr );
          
          gURL = searchURL;
          
          top.content.location.href = "chrome://communicator/content/search/internetresults.xul";
        }
  		}
  		catch(ex)
  		{
  		}
        	setTimeout("checkSearchProgress('" + searchURL + "')", 1000);
    }
	}
}



function switchTab( aPageIndex )
{
	var deck = document.getElementById( "advancedDeck" );
	deck.setAttribute( "index", aPageIndex );
  
  	// decide whether to show/hide/enable/disable save search query button
	if (aPageIndex != 0)	return(true);

	var saveQueryButton = document.getElementById("saveQueryButton");
	if (!saveQueryButton)	return(true);

	var resultsTree = document.getElementById("Tree");
	if( !resultsTree)	return(false);
	var ds = resultsTree.database;
	if (!ds)		return(false);

	var	haveSearchRef = false;

	var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
	if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
	if (rdf)
	{
		var source = rdf.GetResource( "NC:LastSearchRoot", true);
		var childProperty;
		var target;

		// look for last search URI
		childProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#ref", true);
		target = ds.GetTarget(source, childProperty, true);
		if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
		if (target)	target = target.Value;
		if (target && target != "")
		{
			haveSearchRef = true;
		}
	}

	if (haveSearchRef == true)
		saveQueryButton.removeAttribute("disabled", "true");
	else	saveQueryButton.setAttribute("disabled", "true");

  return(true);
}



function saveSearch()
{
	var resultsTree = document.getElementById("Tree");
	if( !resultsTree)	return(false);
	var ds = resultsTree.database;
	if (!ds)		return(false);

	var	lastSearchURI="";
	var	lastSearchText="";

	var rdf = Components.classes["component://netscape/rdf/rdf-service"].getService();
	if (rdf)   rdf = rdf.QueryInterface(Components.interfaces.nsIRDFService);
	if (rdf)
	{
		var source = rdf.GetResource( "NC:LastSearchRoot", true);
		var childProperty;
		var target;

		// look for last search URI
		childProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#ref", true);
		target = ds.GetTarget(source, childProperty, true);
		if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
		if (target)	target = target.Value;
		if (target && target != "")
		{
			lastSearchURI = target;
			debug("Bookmark search  URL: '" + lastSearchURI + "'\n");
		}

		// look for last search text
		childProperty = rdf.GetResource("http://home.netscape.com/NC-rdf#LastText", true);
		target = ds.GetTarget(source, childProperty, true);
		if (target)	target = target.QueryInterface(Components.interfaces.nsIRDFLiteral);
		if (target)	target = target.Value;
		if (target && target != "")
		{
			// convert pluses (+) back to spaces
			target = target.replace(/+/i, " ");

			lastSearchText = unescape(target);
			debug("Bookmark search Name: '" + lastSearchText + "'\n");
		}
	}


	if ((lastSearchURI == null) || (lastSearchURI == ""))	return(false);

// 	rjc says: if lastSearchText is empty/null, that's still OK, synthesize the text
	if ((lastSearchText == null) || (lastSearchText == ""))
	{
		lastSearchText = lastSearchURI;
		var siteOffset = lastSearchText.indexOf("://");
		if (siteOffset > 0)
		{
			siteOffset += 3;
			var endOffset = lastSearchText.indexOf("/", siteOffset);
			if (endOffset > 0)
			{
				lastSearchText = lastSearchText.substr(0, endOffset+1);
			}
		}
	}

	var bmks = Components.classes["component://netscape/browser/bookmarks-service"].getService();
	if (bmks)	bmks = bmks.QueryInterface(Components.interfaces.nsIBookmarksService);

	var textNode = document.getElementById("sidebar-search-text");
	if( !textNode )		return(false);

	var searchTitle = "Search: '" + lastSearchText + "'";	// using " + gSites;
	if (bmks)	bmks.AddBookmark(lastSearchURI, searchTitle, bmks.BOOKMARK_SEARCH_TYPE, null);

	return(true);
}



function doCustomize()
{
	window.openDialog("chrome://communicator/content/search/search-editor.xul", "_blank", "centerscreen,chrome,resizable");
}

function doEnabling()
{
	var searchButton = document.getElementById("searchbutton");
	var sidebarSearchText = document.getElementById("sidebar-search-text");

    if ( sidebarSearchText.value == "" ) 
      {
        // No input, disable search button if enabled.
        if ( !searchButton.getAttribute("disabled") )
          searchButton.setAttribute("disabled","true");
      }
    else
      {
        if ( searchButton.getAttribute("disabled") == "true")
          searchButton.removeAttribute( "disabled");
      }
}