fix regression for autocomplete with empty prefix

lib/ace/autocomplete.js

@@ -283,8 +283,7 @@ var Autocomplete = function() {
             // if (matches.length == 1)
             //     return this.insertMatch(matches[0]);
 
-            // No prefix or no results -> close
+            if (!matches || !matches.length)
-            if (!prefix || !prefix.length || !matches || !matches.length)
                 return doDetach();
 
             // Wrong prefix or wrong session -> ignore

lib/ace/ext/language_tools.js

@@ -117,54 +117,33 @@ var loadSnippetFile = function(id) {
 
 var doLiveAutocomplete = function(e) {
     var editor = e.editor;
-    var session = editor.getSession();
-    var pos = editor.getCursorPosition();
-    var line = session.getLine(pos.row);
-    var hasCompleter = (editor.completer && editor.completer.activated);
-
     var text = e.args || "";
-
+    var pos = editor.getCursorPosition();
-    // Is the user entering text
+    var line = editor.session.getLine(pos.row);
-    // we only want to automatically show the autocomplete dialog
+    var hasCompleter = editor.completer && editor.completer.activated;
-    // whenever the user is typing in text not pasting, deleting, ...
-    var typing = (e.command.name === "insertstring" && text.length === 1);
-
-    // We don't want to autocomplete with no prefix
-    if(
-        e.command.name === 'backspace' &&
-        util.retrievePrecedingIdentifier(line, pos.column) === ''
-    ) {
-        if(hasCompleter) editor.completer.detach();
-        return;
-    }
-
-    // we don't want to autocomplete on paste events
-    if(!typing) {
-        return;
-    }
-
-    // The prefix to autocomplete for
     var prefix = util.retrievePrecedingIdentifier(line, pos.column);
 
+    // We don't want to autocomplete with no prefix
+    if (e.command.name === "backspace" && !prefix) {
+        if (hasCompleter) 
+            editor.completer.detach();
+    }
+    else if (e.command.name === "insertstring") {
         // Only autocomplete if there's a prefix that can be matched
-    if(prefix !== '' && !(hasCompleter)) {
+        if (prefix && !hasCompleter) {
             if (!editor.completer) {
                 // Create new autocompleter
                 editor.completer = new Autocomplete();
-
                 // Disable autoInsert
                 editor.completer.autoInsert = false;
             }
-
             editor.completer.showPopup(editor);
-        // needed for firefox on mac
+        } else if (!prefix && hasCompleter) {
-        editor.completer.cancelContextMenu();
-
-    } else if(prefix === '' && hasCompleter) {
             // When the prefix is empty
             // close the autocomplete dialog
             editor.completer.detach();
         }
+    }
 };
 
 var Editor = require("../editor").Editor;

lib/ace/snippets/javascript.js

@@ -1,9 +1,7 @@
 define(function(require, exports, module) {
 "use strict";
 
-exports.snippetText = require("../requirejs/text!./javascript-jquery.snippets")
+exports.snippetText = require("../requirejs/text!./javascript.snippets");
-    + "\n"
-    + require("../requirejs/text!./javascript.snippets");
 exports.scope = "javascript";
 
 });