Autocomplete exactMatch option

Option to show only exact matches in autocomplete

lib/ace/autocomplete.js

@@ -42,6 +42,7 @@ var snippetManager = require("./snippets").snippetManager;
 var Autocomplete = function() {
     this.autoInsert = true;
     this.autoSelect = true;
+    this.exactMatch = false;
     this.keyboardHandler = new HashHandler();
     this.keyboardHandler.bindKeys(this.commands);
 
@@ -306,6 +307,10 @@ var Autocomplete = function() {
                 return;
 
             this.completions = new FilteredList(matches);
+
+            if (this.exactMatch)
+                this.completions.exactMatch = true;
+
             this.completions.setFilter(prefix);
             var filtered = this.completions.filtered;
 
@@ -416,6 +421,7 @@ var FilteredList = function(array, filterText, mutateData) {
     this.all = array;
     this.filtered = array;
     this.filterText = filterText || "";
+    this.exactMatch = false;
 };
 (function(){
     this.setFilter = function(str) {
@@ -452,6 +458,11 @@ var FilteredList = function(array, filterText, mutateData) {
             var matchMask = 0;
             var penalty = 0;
             var index, distance;
+
+            if (this.exactMatch) {
+                if (needle !== caption.substr(0, needle.length))
+                    continue loop;
+            }else{
                 // caption char iteration is faster in Chrome but slower in Firefox, so lets use indexOf
                 for (var j = 0; j < needle.length; j++) {
                     // TODO add penalty on case mismatch
@@ -470,6 +481,7 @@ var FilteredList = function(array, filterText, mutateData) {
                     matchMask = matchMask | (1 << index);
                     lastIndex = index;
                 }
+            }
             item.matchMask = matchMask;
             item.exactMatch = penalty ? 0 : 1;
             item.score = (item.score || 0) - penalty;