/* FileSaver.js
 * A saveAs() FileSaver implementation.
 * 1.3.2
 * 2016-06-16 18:25:19
 *
 * By Eli Grey, http://eligrey.com
 * License: MIT
 *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
 */

/*global self */
/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */

/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */

var saveAs = saveAs
		|| (function(view) {
			"use strict";
			// IE <10 is explicitly unsupported
			if (typeof view === "undefined" || typeof navigator !== "undefined"
					&& /MSIE [1-9]\./.test(navigator.userAgent)) {
				return;
			}
			var doc = view.document
			// only get URL when necessary in case Blob.js hasn't overridden it
			// yet
			, get_URL = function() {
				return view.URL || view.webkitURL || view;
			}, save_link = doc.createElementNS("http://www.w3.org/1999/xhtml",
					"a"), can_use_save_link = "download" in save_link, click = function(
					node) {
				var event = new MouseEvent("click");
				node.dispatchEvent(event);
			}, is_safari = /constructor/i.test(view.HTMLElement) || view.safari, is_chrome_ios = /CriOS\/[\d]+/
					.test(navigator.userAgent), throw_outside = function(ex) {
				(view.setImmediate || view.setTimeout)(function() {
					throw ex;
				}, 0);
			}, force_saveable_type = "application/octet-stream"
			// the Blob API is fundamentally broken as there is no
			// "downloadfinished" event to subscribe to
			, arbitrary_revoke_timeout = 1000 * 40 // 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();
					}
				};
				setTimeout(revoker, arbitrary_revoke_timeout);
			}, dispatch = function(filesaver, event_types, event) {
				event_types = [].concat(event_types);
				var i = event_types.length;
				while (i--) {
					var listener = filesaver["on" + event_types[i]];
					if (typeof listener === "function") {
						try {
							listener.call(filesaver, event || filesaver);
						} catch (ex) {
							throw_outside(ex);
						}
					}
				}
			}, auto_bom = function(blob) {
				// prepend BOM for UTF-8 XML and text/* types (including HTML)
				// note: your browser will automatically convert UTF-16 U+FEFF
				// to EF BB BF
				if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i
						.test(blob.type)) {
					return new Blob([ String.fromCharCode(0xFEFF), blob ], {
						type : blob.type
					});
				}
				return blob;
			}, FileSaver = function(blob, name, no_auto_bom) {
				if (!no_auto_bom) {
					blob = auto_bom(blob);
				}
				// First try a.download, then web filesystem, then object URLs
				var filesaver = this, type = blob.type, force = type === force_saveable_type, object_url, dispatch_all = function() {
					dispatch(filesaver, "writestart progress write writeend"
							.split(" "));
				}
				// on any filesys errors revert to saving with object URLs
				, fs_error = function() {
					if ((is_chrome_ios || (force && is_safari))
							&& view.FileReader) {
						// Safari doesn't allow downloading of blob urls
						var reader = new FileReader();
						reader.onloadend = function() {
							var url = is_chrome_ios ? reader.result
									: reader.result.replace(/^data:[^;]*;/,
											'data:attachment/file;');
							var popup = view.open(url, '_blank');
							if (!popup)
								view.location.href = url;
							url = undefined; // release reference before
												// dispatching
							filesaver.readyState = filesaver.DONE;
							dispatch_all();
						};
						reader.readAsDataURL(blob);
						filesaver.readyState = filesaver.INIT;
						return;
					}
					// don't create more object URLs than needed
					if (!object_url) {
						object_url = get_URL().createObjectURL(blob);
					}
					if (force) {
						view.location.href = object_url;
					} else {
						var opened = view.open(object_url, "_blank");
						if (!opened) {
							// Apple does not allow window.open, see
							// https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
							view.location.href = object_url;
						}
					}
					filesaver.readyState = filesaver.DONE;
					dispatch_all();
					revoke(object_url);
				};
				filesaver.readyState = filesaver.INIT;

				if (can_use_save_link) {
					object_url = get_URL().createObjectURL(blob);
					setTimeout(function() {
						save_link.href = object_url;
						save_link.download = name;
						click(save_link);
						dispatch_all();
						revoke(object_url);
						filesaver.readyState = filesaver.DONE;
					});
					return;
				}

				fs_error();
			}, FS_proto = FileSaver.prototype, saveAs = function(blob, name,
					no_auto_bom) {
				return new FileSaver(blob, name || blob.name || "download",
						no_auto_bom);
			};
			// IE 10+ (native saveAs)
			if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
				return function(blob, name, no_auto_bom) {
					name = name || blob.name || "download";

					if (!no_auto_bom) {
						blob = auto_bom(blob);
					}
					return navigator.msSaveOrOpenBlob(blob, name);
				};
			}

			FS_proto.abort = function() {
			};
			FS_proto.readyState = FS_proto.INIT = 0;
			FS_proto.WRITING = 1;
			FS_proto.DONE = 2;

			FS_proto.error = FS_proto.onwritestart = FS_proto.onprogress = FS_proto.onwrite = FS_proto.onabort = FS_proto.onerror = FS_proto.onwriteend = null;

			return saveAs;
		}(typeof self !== "undefined" && self || typeof window !== "undefined"
				&& window || this.content));
// `self` is undefined in Firefox for Android content script context
// while `this` is nsIContentFrameMessageManager
// with an attribute `content` that corresponds to the window

if (typeof module !== "undefined" && module.exports) {
	module.exports.saveAs = saveAs;
} else if ((typeof define !== "undefined" && define !== null)
		&& (define.amd !== null)) {
	define("FileSaver.js", function() {
		return saveAs;
	});
}