Fix #336: add autosave extension

src/extensions/extra/Autosave/main.js

@@ -0,0 +1,54 @@
+/*jslint vars: true, plusplus: true, devel: true, nomen: true, indent: 4, maxerr: 50 */
+/*global define, brackets */
+
+define(function (require, exports, module) {
+    "use strict";
+
+    /**
+     * Adds automatic saving to all documents in the editor. A document
+     * gets queued for saving when it is marked as dirty by the DocumentManager.
+     * We then wait a certain number of ms until we trigger a save for the document.
+     * You can change `WRITE_DELAY_MS` below to whatever number you think reasonable.
+     */
+
+    // Time in ms to wait after a dirtyFlagChange event before autosaving file
+    var WRITE_DELAY_MS = 15 * 1000;
+
+    var FILE_SAVE       = brackets.getModule("command/Commands").FILE_SAVE, 
+        SaveCommand     = brackets.getModule("command/CommandManager").get(FILE_SAVE),
+        DocumentManager = brackets.getModule("document/DocumentManager");
+
+    // In progress saves
+    var inProgress = {};
+
+    function scheduleSave(doc) {
+        var path = doc.file.fullPath;
+
+        // Skip subsequent attempts to save, if we're already waiting on a save
+        if(inProgress[path]) {
+            return;
+        }
+
+        doc.addRef();
+        inProgress[path] = true;
+
+        function finish() {
+            doc.releaseRef();
+            delete inProgress[path];
+        }
+
+        setTimeout(function() {
+            SaveCommand.execute({doc: doc})
+                .done(finish)
+                .fail(function(err) {
+                    console.error('[Autosave] failed write for `' + path + '`', err);
+                    finish();
+                });
+        }, WRITE_DELAY_MS);
+    }
+
+    // When the editor's document is flagged as having changes, schedule a save
+    DocumentManager.on("dirtyFlagChange", function(evt, doc) {
+        scheduleSave(doc);
+    });
+});

src/utils/BrambleExtensionLoader.js

@@ -60,7 +60,8 @@ define(function (require, exports, module) {
     var extraExtensions = [
         "brackets-cdn-suggestions",    // https://github.com/szdc/brackets-cdn-suggestions
         "ImageUrlCodeHints",
-        "HTMLHinter"
+        "HTMLHinter",
+        "Autosave"
     ];
 
     // Disable any extensions we found on the query string's disableExtensions param