Bug 271299: Help Viewer search results should be updated with every keystroke (live search). r=jan

toolkit/components/help/content/help.js

@@ -620,15 +620,19 @@ function doFind() {
     // 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;
+    // if the search string is empty or contains only whitespace, purge the results tree and return
+    RE = findText.value.match(/\S+/g);
+    if (!RE) {
+      searchTree.builder.rebuild();
+      return;
+    }
 
-        RE[i] = new RegExp(RE[i], "i");
+    // compile the search string, which has already been split up above, into regexp's
+    for (var i=0; i < RE.length; ++i) {
+      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);
@@ -661,12 +665,6 @@ function doFind() {
     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()) {

toolkit/components/help/content/help.xul

@@ -315,16 +315,8 @@
                     accesskey="&searchtab.accesskey;"/>
 
                 <vbox id="help-search-panel" hidden="true" flex="1">
-                    <hbox align="center">
-                        <textbox id="findText" flex="1" oninput="doEnabling();"
-                            onkeypress="if ((event.keyCode
-                                == KeyEvent.DOM_VK_ENTER) || (event.keyCode
-                                == KeyEvent.DOM_VK_RETURN))
-                                doFind();"/>
-                        <button id="findButton" default="true" disabled="true"
-                            label="&gobtn.label;" oncommand="doFind()"
-                            flex="0"/>
-                    </hbox>
+                    <textbox id="findText" type="timed" timeout="500"
+                             oncommand="doFind();"/>
                     <tree id="help-search-tree" class="focusring"
                             flex="1" hidecolumnpicker="true"
                             datasources="rdf:null"

toolkit/components/help/locale/en-US/help.dtd

@@ -48,7 +48,6 @@
 <!ENTITY glossarytab.label  	  	"Glossary">
 <!ENTITY glossarytab.accesskey          "G">
 <!ENTITY glossname.label    	  	"Name">
-<!ENTITY gobtn.label        	  	"Search">
 <!ENTITY name.label	    	  	"Item">
 
 <!ENTITY textZoomReduceCmd.commandkey	"-">