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‎CYOS/fileSaver.js‎

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/*! FileSaver.js
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* A saveAs() FileSaver implementation.
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* 2014-01-24
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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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/*global self */
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/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
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/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
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var saveAs = saveAs
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// IE 10+ (native saveAs)
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|| (typeof navigator !== "undefined" &&
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navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
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// Everyone else
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|| (function (view) {
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"use strict";
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// IE <10 is explicitly unsupported
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if (typeof navigator !== "undefined" &&
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/MSIE [1-9]\./.test(navigator.userAgent)) {
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return;
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}
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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 = !view.externalHost && "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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// FF for Android has a nasty garbage collection mechanism
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// that turns all objects that are not pure javascript into 'deadObject'
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// this means `doc` and `save_link` are unusable and need to be recreated
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// `view` is usable though:
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doc = view.document;
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save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");
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save_link.href = object_url;
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save_link.download = name;
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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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save_link.dispatchEvent(event);
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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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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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view.addEventListener("unload", process_deletion_queue, false);
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saveAs.unload = function () {
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process_deletion_queue();
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view.removeEventListener("unload", process_deletion_queue, false);
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};
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return saveAs;
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}(
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typeof self !== "undefined" && self
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|| typeof window !== "undefined" && window
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|| this.content
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));
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// `self` is undefined in Firefox for Android content script context
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// while `this` is nsIContentFrameMessageManager
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// with an attribute `content` that corresponds to the window
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if (typeof module !== "undefined" && module !== null) {
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module.exports = saveAs;
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} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
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define([], function () {
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return saveAs;
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});
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}

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