Update FileSaver.js

public/js/FileSaver.js

@@ -1,6 +1,6 @@
 /* FileSaver.js
  * A saveAs() FileSaver implementation.
- *  2014-05-27
+ * 2015-03-04
  *
  * By Eli Grey, http://eligrey.com
  * License: X11/MIT
@@ -31,7 +31,7 @@ var saveAs = saveAs
 			return view.URL || view.webkitURL || view;
 		}
 		, save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
-		, can_use_save_link = !view.externalHost && "download" in save_link
+		, can_use_save_link = "download" in save_link
 		, click = function(node) {
 			var event = doc.createEvent("MouseEvents");
 			event.initMouseEvent(
@@ -49,18 +49,23 @@ var saveAs = saveAs
 		}
 		, force_saveable_type = "application/octet-stream"
 		, fs_min_size = 0
-		, deletion_queue = []
-		, process_deletion_queue = function() {
-			var i = deletion_queue.length;
-			while (i--) {
-				var file = deletion_queue[i];
+		// See https://code.google.com/p/chromium/issues/detail?id=375297#c7 and
+		// https://github.com/eligrey/FileSaver.js/commit/485930a#commitcomment-8768047
+		// for the reasoning behind the timeout and revocation flow
+		, arbitrary_revoke_timeout = 500 // in ms
+		, revoke = function(file) {
+			var revoker = function() {
 				if (typeof file === "string") { // file is an object URL
 					get_URL().revokeObjectURL(file);
 				} else { // file is a File
 					file.remove();
 				}
+			};
+			if (view.chrome) {
+				revoker();
+			} else {
+				setTimeout(revoker, arbitrary_revoke_timeout);
 			}
-			deletion_queue.length = 0; // clear queue
 		}
 		, dispatch = function(filesaver, event_types, event) {
 			event_types = [].concat(event_types);
@@ -84,11 +89,6 @@ var saveAs = saveAs
 				, blob_changed = false
 				, object_url
 				, target_view
-				, get_object_url = function() {
-					var object_url = get_URL().createObjectURL(blob);
-					deletion_queue.push(object_url);
-					return object_url;
-				}
 				, dispatch_all = function() {
 					dispatch(filesaver, "writestart progress write writeend".split(" "));
 				}
@@ -96,15 +96,20 @@ var saveAs = saveAs
 				, fs_error = function() {
 					// don't create more object URLs than needed
 					if (blob_changed || !object_url) {
-						object_url = get_object_url(blob);
+						object_url = get_URL().createObjectURL(blob);
 					}
 					if (target_view) {
 						target_view.location.href = object_url;
 					} else {
-						window.open(object_url, "_blank");
+						var new_tab = view.open(object_url, "_blank");
+						if (new_tab == undefined && typeof safari !== "undefined") {
+							//Apple do not allow window.open, see http://bit.ly/1kZffRI
+							view.location.href = object_url
+						}
 					}
 					filesaver.readyState = filesaver.DONE;
 					dispatch_all();
+					revoke(object_url);
 				}
 				, abortable = function(func) {
 					return function() {
@@ -121,17 +126,24 @@ var saveAs = saveAs
 				name = "download";
 			}
 			if (can_use_save_link) {
-				object_url = get_object_url(blob);
+				object_url = get_URL().createObjectURL(blob);
 				save_link.href = object_url;
 				save_link.download = name;
 				click(save_link);
 				filesaver.readyState = filesaver.DONE;
 				dispatch_all();
+				revoke(object_url);
 				return;
 			}
+			// prepend BOM for UTF-8 XML and text/plain types
+			if (/^\s*(?:text\/(?:plain|xml)|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
+				blob = new Blob(["\ufeff", blob], {type: blob.type});
+			}
 			// Object and web filesystem URLs have a problem saving in Google Chrome when
 			// viewed in a tab, so I force save with application/octet-stream
 			// http://code.google.com/p/chromium/issues/detail?id=91158
+			// Update: Google errantly closed 91158, I submitted it again:
+			// https://code.google.com/p/chromium/issues/detail?id=389642
 			if (view.chrome && type && type !== force_saveable_type) {
 				slice = blob.slice || blob.webkitSlice;
 				blob = slice.call(blob, 0, blob.size, force_saveable_type);
@@ -158,9 +170,9 @@ var saveAs = saveAs
 							file.createWriter(abortable(function(writer) {
 								writer.onwriteend = function(event) {
 									target_view.location.href = file.toURL();
-									deletion_queue.push(file);
 									filesaver.readyState = filesaver.DONE;
 									dispatch(filesaver, "writeend", event);
+									revoke(file);
 								};
 								writer.onerror = function() {
 									var error = writer.error;
@@ -217,11 +229,6 @@ var saveAs = saveAs
 	FS_proto.onwriteend =
 		null;
 
-	view.addEventListener("unload", process_deletion_queue, false);
-	saveAs.unload = function() {
-		process_deletion_queue();
-		view.removeEventListener("unload", process_deletion_queue, false);
-	};
 	return saveAs;
 }(
 	   typeof self !== "undefined" && self
@@ -232,8 +239,8 @@ var saveAs = saveAs
 // while `this` is nsIContentFrameMessageManager
 // with an attribute `content` that corresponds to the window
 
-if (typeof module !== "undefined" && module !== null) {
-  module.exports = saveAs;
+if (typeof module !== "undefined" && module.exports) {
+  module.exports.saveAs = saveAs;
 } else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
   define([], function() {
     return saveAs;