load snippet files automatically

lib/ace/autocomplete/text_completer.js

@@ -42,7 +42,7 @@ define(function(require, exports, module) {
     function filterPrefix(prefix, words) {
         var results = [];
         for (var i = 0; i < words.length; i++) {
-            if (words[i].indexOf(prefix) === 0) {
+            if (words[i].lastIndexOf(prefix, 0) === 0) {
                 results.push(words[i]);
             }
         }

lib/ace/ext/language_tools.js

@@ -33,10 +33,27 @@ define(function(require, exports, module) {
 
 var snippetManager = require("../snippets").snippetManager;
 var Autocomplete = require("../autocomplete").Autocomplete;
+var config = require("../config");
 
 var textCompleter = require("../autocomplete/text_completer");
+var keyWordCompleter = {
+    getCompletions: function(session, pos, prefix, callback) {
+        var keywords = session.$mode.$keywordList || [];
+        keywords.filter(function(w) {
+            return w.lastIndexOf(prefix, 0);
+        });
+        callback(null, keywords.map(function(word) {
+            return {
+                name: word,
+                value: word,
+                score: 0,
+                meta: "keyword"
+            };
+        }));
+    }
+};
 
-var completers = [textCompleter];
+var completers = [textCompleter, keyWordCompleter]; // todo add snippets completer
 exports.addCompleter = function(completer) {
     completers.push(completer);
 };
@@ -51,6 +68,21 @@ var expandSnippet = {
     bindKey: "tab"
 }
 
+var onChangeMode = function(e, editor) {
+    var mode = editor.session.$mode;
+    var id = mode.$id
+    if (!snippetManager.files) snippetManager.files = {};
+    if (id && !snippetManager.files[id]) {
+        var snippetFilePath = id.replace("mode", "snippets");
+        config.loadModule(snippetFilePath, function(m) {
+            if (m) {
+                snippetManager.files[id] = m;
+                m.snippets = snippetManager.parseSnippetFile(m.snippetText);
+                snippetManager.register(m.snippets, m.scope);
+            }
+        });
+    }
+};
 
 var Editor = require("../editor").Editor;
 require("../config").defineOptions(Editor.prototype, "editor", {
@@ -63,17 +95,20 @@ require("../config").defineOptions(Editor.prototype, "editor", {
                 this.commands.removeCommand(Autocomplete.startCommand);
             }
         },
-        value: true
+        value: false
     },
     enableSnippets: {
         set: function(val) {
             if (val) {
                 this.commands.addCommand(expandSnippet);
+                this.on("changeMode", onChangeMode);
+                onChangeMode(null, this)
             } else {
                 this.commands.removeCommand(expandSnippet);
+                this.off("changeMode", onChangeMode);
             }
         },
-        value: true
+        value: false
     }
 });