/* Blob.js

  * A Blob implementation.

  * 2013-06-20

  *

  * By Eli Grey, http://eligrey.com

  * By Devin Samarin, https://github.com/eboyjr

  * License: X11/MIT

  *   See LICENSE.md

  */

 /*global self, unescape */

 /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,

   plusplus: true */

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

 if (!(typeof Blob === "function" || typeof Blob === "object") || typeof URL === "undefined")

 if ((typeof Blob === "function" || typeof Blob === "object") && typeof webkitURL !== "undefined") self.URL = webkitURL;

 else var Blob = (function (view) {

 	"use strict";

 	var BlobBuilder = view.BlobBuilder || view.WebKitBlobBuilder || view.MozBlobBuilder || view.MSBlobBuilder || (function(view) {

 		var

 			  get_class = function(object) {

 				return Object.prototype.toString.call(object).match(/^\[object\s(.*)\]$/)[1];

 			}

 			, FakeBlobBuilder = function BlobBuilder() {

 				this.data = [];

 			}

 			, FakeBlob = function Blob(data, type, encoding) {

 				this.data = data;

 				this.size = data.length;

 				this.type = type;

 				this.encoding = encoding;

 			}

 			, FBB_proto = FakeBlobBuilder.prototype

 			, FB_proto = FakeBlob.prototype

 			, FileReaderSync = view.FileReaderSync

 			, FileException = function(type) {

 				this.code = this[this.name = type];

 			}

 			, file_ex_codes = (

 				  "NOT_FOUND_ERR SECURITY_ERR ABORT_ERR NOT_READABLE_ERR ENCODING_ERR "

 				+ "NO_MODIFICATION_ALLOWED_ERR INVALID_STATE_ERR SYNTAX_ERR"

 			).split(" ")

 			, file_ex_code = file_ex_codes.length

 			, real_URL = view.URL || view.webkitURL || view

 			, real_create_object_URL = real_URL.createObjectURL

 			, real_revoke_object_URL = real_URL.revokeObjectURL

 			, URL = real_URL

 			, btoa = view.btoa

 			, atob = view.atob

 			, ArrayBuffer = view.ArrayBuffer

 			, Uint8Array = view.Uint8Array

 		;

 		FakeBlob.fake = FB_proto.fake = true;

 		while (file_ex_code--) {

 			FileException.prototype[file_ex_codes[file_ex_code]] = file_ex_code + 1;

 		}

 		if (!real_URL.createObjectURL) {

 			URL = view.URL = {};

 		}

 		URL.createObjectURL = function(blob) {

 			var

 				  type = blob.type

 				, data_URI_header

 			;

 			if (type === null) {

 				type = "application/octet-stream";

 			}

 			if (blob instanceof FakeBlob) {

 				data_URI_header = "data:" + type;

 				if (blob.encoding === "base64") {

 					return data_URI_header + ";base64," + blob.data;

 				} else if (blob.encoding === "URI") {

 					return data_URI_header + "," + decodeURIComponent(blob.data);

 				} if (btoa) {

 					return data_URI_header + ";base64," + btoa(blob.data);

 				} else {

 					return data_URI_header + "," + encodeURIComponent(blob.data);

 				}

 			} else if (real_create_object_URL) {

 				return real_create_object_URL.call(real_URL, blob);

 			}

 		};

 		URL.revokeObjectURL = function(object_URL) {

 			if (object_URL.substring(0, 5) !== "data:" && real_revoke_object_URL) {

 				real_revoke_object_URL.call(real_URL, object_URL);

 			}

 		};

 		FBB_proto.append = function(data/*, endings*/) {

 			var bb = this.data;

 			// decode data to a binary string

 			if (Uint8Array && (data instanceof ArrayBuffer || data instanceof Uint8Array)) {

 				var

 					  str = ""

 					, buf = new Uint8Array(data)

 					, i = 0

 					, buf_len = buf.length

 				;

 				for (; i < buf_len; i++) {

 					str += String.fromCharCode(buf[i]);

 				}

 				bb.push(str);

 			} else if (get_class(data) === "Blob" || get_class(data) === "File") {

 				if (FileReaderSync) {

 					var fr = new FileReaderSync;

 					bb.push(fr.readAsBinaryString(data));

 				} else {

 					// async FileReader won't work as BlobBuilder is sync

 					throw new FileException("NOT_READABLE_ERR");

 				}

 			} else if (data instanceof FakeBlob) {

 				if (data.encoding === "base64" && atob) {

 					bb.push(atob(data.data));

 				} else if (data.encoding === "URI") {

 					bb.push(decodeURIComponent(data.data));

 				} else if (data.encoding === "raw") {

 					bb.push(data.data);

 				}

 			} else {

 				if (typeof data !== "string") {

 					data += ""; // convert unsupported types to strings

 				}

 				// decode UTF-16 to binary string

 				bb.push(unescape(encodeURIComponent(data)));

 			}

 		};

 		FBB_proto.getBlob = function(type) {

 			if (!arguments.length) {

 				type = null;

 			}

 			return new FakeBlob(this.data.join(""), type, "raw");

 		};

 		FBB_proto.toString = function() {

 			return "[object BlobBuilder]";

 		};

 		FB_proto.slice = function(start, end, type) {

 			var args = arguments.length;

 			if (args < 3) {

 				type = null;

 			}

 			return new FakeBlob(

 				  this.data.slice(start, args > 1 ? end : this.data.length)

 				, type

 				, this.encoding

 			);

 		};

 		FB_proto.toString = function() {

 			return "[object Blob]";

 		};

 		return FakeBlobBuilder;

 	}(view));

 	return function Blob(blobParts, options) {

 		var type = options ? (options.type || "") : "";

 		var builder = new BlobBuilder();

 		if (blobParts) {

 			for (var i = 0, len = blobParts.length; i < len; i++) {

 				builder.append(blobParts[i]);

 			}

 		}

 		return builder.getBlob(type);

 	};

 }(self));

 /* FileSaver.js

  * A saveAs() FileSaver implementation.

  * 2013-10-21

  *

  * By Eli Grey, http://eligrey.com

  * License: X11/MIT

  *   See LICENSE.md

  */

 /*global self */

 /*jslint bitwise: true, regexp: true, confusion: true, es5: true, vars: true, white: true,

   plusplus: true */

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

 var saveAs = saveAs

   || (typeof navigator !== 'undefined' && navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))

   || (function(view) {

 	"use strict";

 	var

 		  doc = view.document

 		  // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet

 		, get_URL = function() {

 			return view.URL || view.webkitURL || view;

 		}

 		, URL = 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

 		, click = function(node) {

 			var event = doc.createEvent("MouseEvents");

 			event.initMouseEvent(

 				"click", true, false, view, 0, 0, 0, 0, 0

 				, false, false, false, false, 0, null

 			);

 			node.dispatchEvent(event);

 		}

 		, webkit_req_fs = view.webkitRequestFileSystem

 		, req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem

 		, throw_outside = function (ex) {

 			(view.setImmediate || view.setTimeout)(function() {

 				throw ex;

 			}, 0);

 		}

 		, 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];

 				if (typeof file === "string") { // file is an object URL

 					URL.revokeObjectURL(file);

 				} else { // file is a File

 					file.remove();

 				}

 			}

 			deletion_queue.length = 0; // clear queue

 		}

 		, 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);

 					}

 				}

 			}

 		}

 		, FileSaver = function(blob, name) {

 			// First try a.download, then web filesystem, then object URLs

 			var

 				  filesaver = this

 				, type = blob.type

 				, 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(" "));

 				}

 				// on any filesys errors revert to saving with object URLs

 				, fs_error = function() {

 					// don't create more object URLs than needed

 					if (blob_changed || !object_url) {

 						object_url = get_object_url(blob);

 					}

 					if (target_view) {

 						target_view.location.href = object_url;

 					} else {

                         window.open(object_url, "_blank");

                     }

 					filesaver.readyState = filesaver.DONE;

 					dispatch_all();

 				}

 				, abortable = function(func) {

 					return function() {

 						if (filesaver.readyState !== filesaver.DONE) {

 							return func.apply(this, arguments);

 						}

 					};

 				}

 				, create_if_not_found = {create: true, exclusive: false}

 				, slice

 			;

 			filesaver.readyState = filesaver.INIT;

 			if (!name) {

 				name = "download";

 			}

 			if (can_use_save_link) {

 				object_url = get_object_url(blob);

 				// FF for Android has a nasty garbage collection mechanism

 				// that turns all objects that are not pure javascript into 'deadObject'

 				// this means `doc` and `save_link` are unusable and need to be recreated

 				// `view` is usable though:

 				doc = view.document;

 				save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");

 				save_link.href = object_url;

 				save_link.download = name;

 				var event = doc.createEvent("MouseEvents");

 				event.initMouseEvent(

 					"click", true, false, view, 0, 0, 0, 0, 0

 					, false, false, false, false, 0, null

 				);

 				save_link.dispatchEvent(event);

 				filesaver.readyState = filesaver.DONE;

 				dispatch_all();

 				return;

 			}

 			// 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

 			if (view.chrome && type && type !== force_saveable_type) {

 				slice = blob.slice || blob.webkitSlice;

 				blob = slice.call(blob, 0, blob.size, force_saveable_type);

 				blob_changed = true;

 			}

 			// Since I can't be sure that the guessed media type will trigger a download

 			// in WebKit, I append .download to the filename.

 			// https://bugs.webkit.org/show_bug.cgi?id=65440

 			if (webkit_req_fs && name !== "download") {

 				name += ".download";

 			}

 			if (type === force_saveable_type || webkit_req_fs) {

 				target_view = view;

 			}

 			if (!req_fs) {

 				fs_error();

 				return;

 			}

 			fs_min_size += blob.size;

 			req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {

 				fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {

 					var save = function() {

 						dir.getFile(name, create_if_not_found, abortable(function(file) {

 							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);

 								};

 								writer.onerror = function() {

 									var error = writer.error;

 									if (error.code !== error.ABORT_ERR) {

 										fs_error();

 									}

 								};

 								"writestart progress write abort".split(" ").forEach(function(event) {

 									writer["on" + event] = filesaver["on" + event];

 								});

 								writer.write(blob);

 								filesaver.abort = function() {

 									writer.abort();

 									filesaver.readyState = filesaver.DONE;

 								};

 								filesaver.readyState = filesaver.WRITING;

 							}), fs_error);

 						}), fs_error);

 					};

 					dir.getFile(name, {create: false}, abortable(function(file) {

 						// delete file if it already exists

 						file.remove();

 						save();

 					}), abortable(function(ex) {

 						if (ex.code === ex.NOT_FOUND_ERR) {

 							save();

 						} else {

 							fs_error();

 						}

 					}));

 				}), fs_error);

 			}), fs_error);

 		}

 		, FS_proto = FileSaver.prototype

 		, saveAs = function(blob, name) {

 			return new FileSaver(blob, name);

 		}

 	;

 	FS_proto.abort = function() {

 		var filesaver = this;

 		filesaver.readyState = filesaver.DONE;

 		dispatch(filesaver, "abort");

 	};

 	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;

 	view.addEventListener("unload", process_deletion_queue, false);

 	return saveAs;

 }(this.self || this.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 = saveAs;