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+/* FileSaver.js
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+ * A saveAs() FileSaver implementation.
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+ * 2013-01-23
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+ *
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+ * By Eli Grey, http://eligrey.com
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+ * License: X11/MIT
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+ * See LICENSE.md
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+ */
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+
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+/*global self */
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+/*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,
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+ plusplus: true */
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+
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+/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
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+
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+var saveAs = saveAs
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+ || (navigator.msSaveBlob && navigator.msSaveBlob.bind(navigator))
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+ || (function(view) {
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+ "use strict";
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+ var
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+ doc = view.document
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+ // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet
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+ , get_URL = function() {
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+ return view.URL || view.webkitURL || view;
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+ }
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+ , URL = view.URL || view.webkitURL || view
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+ , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
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+ , can_use_save_link = "download" in save_link
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+ , click = function(node) {
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+ var event = doc.createEvent("MouseEvents");
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+ event.initMouseEvent(
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+ "click", true, false, view, 0, 0, 0, 0, 0
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+ , false, false, false, false, 0, null
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+ );
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+ node.dispatchEvent(event);
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+ }
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+ , webkit_req_fs = view.webkitRequestFileSystem
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+ , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
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+ , throw_outside = function (ex) {
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+ (view.setImmediate || view.setTimeout)(function() {
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+ throw ex;
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+ }, 0);
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+ }
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+ , force_saveable_type = "application/octet-stream"
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+ , fs_min_size = 0
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+ , deletion_queue = []
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+ , process_deletion_queue = function() {
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+ var i = deletion_queue.length;
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+ while (i--) {
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+ var file = deletion_queue[i];
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+ if (typeof file === "string") { // file is an object URL
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+ URL.revokeObjectURL(file);
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+ } else { // file is a File
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+ file.remove();
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+ }
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+ }
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+ deletion_queue.length = 0; // clear queue
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+ }
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+ , dispatch = function(filesaver, event_types, event) {
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+ event_types = [].concat(event_types);
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+ var i = event_types.length;
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+ while (i--) {
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+ var listener = filesaver["on" + event_types[i]];
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+ if (typeof listener === "function") {
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+ try {
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+ listener.call(filesaver, event || filesaver);
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+ } catch (ex) {
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+ throw_outside(ex);
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+ }
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+ }
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+ }
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+ }
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+ , FileSaver = function(blob, name) {
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+ // First try a.download, then web filesystem, then object URLs
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+ var
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+ filesaver = this
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+ , type = blob.type
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+ , blob_changed = false
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+ , object_url
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+ , target_view
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+ , get_object_url = function() {
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+ var object_url = get_URL().createObjectURL(blob);
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+ deletion_queue.push(object_url);
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+ return object_url;
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+ }
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+ , dispatch_all = function() {
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+ dispatch(filesaver, "writestart progress write writeend".split(" "));
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+ }
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+ // on any filesys errors revert to saving with object URLs
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+ , fs_error = function() {
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+ // don't create more object URLs than needed
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+ if (blob_changed || !object_url) {
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+ object_url = get_object_url(blob);
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+ }
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+ if (target_view) {
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+ target_view.location.href = object_url;
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+ } else {
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+ window.open(object_url, "_blank");
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+ }
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+ filesaver.readyState = filesaver.DONE;
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+ dispatch_all();
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+ }
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+ , abortable = function(func) {
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+ return function() {
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+ if (filesaver.readyState !== filesaver.DONE) {
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+ return func.apply(this, arguments);
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+ }
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+ };
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+ }
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+ , create_if_not_found = {create: true, exclusive: false}
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+ , slice
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+ ;
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+ filesaver.readyState = filesaver.INIT;
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+ if (!name) {
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+ name = "download";
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+ }
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+ if (can_use_save_link) {
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+ object_url = get_object_url(blob);
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+ save_link.href = object_url;
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+ save_link.download = name;
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+ click(save_link);
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+ filesaver.readyState = filesaver.DONE;
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+ dispatch_all();
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+ return;
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+ }
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+ // Object and web filesystem URLs have a problem saving in Google Chrome when
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+ // viewed in a tab, so I force save with application/octet-stream
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+ // http://code.google.com/p/chromium/issues/detail?id=91158
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+ if (view.chrome && type && type !== force_saveable_type) {
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+ slice = blob.slice || blob.webkitSlice;
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+ blob = slice.call(blob, 0, blob.size, force_saveable_type);
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+ blob_changed = true;
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+ }
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+ // Since I can't be sure that the guessed media type will trigger a download
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+ // in WebKit, I append .download to the filename.
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+ // https://bugs.webkit.org/show_bug.cgi?id=65440
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+ if (webkit_req_fs && name !== "download") {
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+ name += ".download";
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+ }
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+ if (type === force_saveable_type || webkit_req_fs) {
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+ target_view = view;
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+ }
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+ if (!req_fs) {
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+ fs_error();
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+ return;
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+ }
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+ fs_min_size += blob.size;
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+ req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
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+ fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
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+ var save = function() {
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+ dir.getFile(name, create_if_not_found, abortable(function(file) {
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+ file.createWriter(abortable(function(writer) {
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+ writer.onwriteend = function(event) {
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+ target_view.location.href = file.toURL();
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+ deletion_queue.push(file);
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+ filesaver.readyState = filesaver.DONE;
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+ dispatch(filesaver, "writeend", event);
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+ };
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+ writer.onerror = function() {
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+ var error = writer.error;
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+ if (error.code !== error.ABORT_ERR) {
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+ fs_error();
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+ }
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+ };
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+ "writestart progress write abort".split(" ").forEach(function(event) {
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+ writer["on" + event] = filesaver["on" + event];
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+ });
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+ writer.write(blob);
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+ filesaver.abort = function() {
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+ writer.abort();
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+ filesaver.readyState = filesaver.DONE;
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+ };
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+ filesaver.readyState = filesaver.WRITING;
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+ }), fs_error);
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+ }), fs_error);
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+ };
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+ dir.getFile(name, {create: false}, abortable(function(file) {
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+ // delete file if it already exists
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+ file.remove();
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+ save();
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+ }), abortable(function(ex) {
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+ if (ex.code === ex.NOT_FOUND_ERR) {
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+ save();
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+ } else {
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+ fs_error();
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+ }
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+ }));
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+ }), fs_error);
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+ }), fs_error);
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+ }
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+ , FS_proto = FileSaver.prototype
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+ , saveAs = function(blob, name) {
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+ return new FileSaver(blob, name);
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+ }
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+ ;
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+ FS_proto.abort = function() {
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+ var filesaver = this;
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+ filesaver.readyState = filesaver.DONE;
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+ dispatch(filesaver, "abort");
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+ };
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+ FS_proto.readyState = FS_proto.INIT = 0;
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+ FS_proto.WRITING = 1;
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+ FS_proto.DONE = 2;
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+
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+ FS_proto.error =
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+ FS_proto.onwritestart =
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+ FS_proto.onprogress =
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+ FS_proto.onwrite =
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+ FS_proto.onabort =
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+ FS_proto.onerror =
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+ FS_proto.onwriteend =
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+ null;
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+
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+ view.addEventListener("unload", process_deletion_queue, false);
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+ return saveAs;
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+}(self));
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Yusaku Sako