afb-client/bower_components/jszip/vendor/FileSaver.js

   1 /*! FileSaver.js
   2  *  A saveAs() FileSaver implementation.
   3  *  2014-01-24
   4  *
   5  *  By Eli Grey, http://eligrey.com
   6  *  License: X11/MIT
   7  *    See LICENSE.md
   8  */
   9
  10 /*global self */
  11 /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
  12
  13 /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
  14
  15 var saveAs = saveAs
  16   // IE 10+ (native saveAs)
  17   || (typeof navigator !== "undefined" &&
  18       navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator))
  19   // Everyone else
  20   || (function(view) {
  21         "use strict";
  22         // IE <10 is explicitly unsupported
  23         if (typeof navigator !== "undefined" &&
  24             /MSIE [1-9]\./.test(navigator.userAgent)) {
  25                 return;
  26         }
  27         var
  28                   doc = view.document
  29                   // only get URL when necessary in case BlobBuilder.js hasn't overridden it yet
  30                 , get_URL = function() {
  31                         return view.URL || view.webkitURL || view;
  32                 }
  33                 , URL = view.URL || view.webkitURL || view
  34                 , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
  35                 , can_use_save_link = !view.externalHost && "download" in save_link
  36                 , click = function(node) {
  37                         var event = doc.createEvent("MouseEvents");
  38                         event.initMouseEvent(
  39                                 "click", true, false, view, 0, 0, 0, 0, 0
  40                                 , false, false, false, false, 0, null
  41                         );
  42                         node.dispatchEvent(event);
  43                 }
  44                 , webkit_req_fs = view.webkitRequestFileSystem
  45                 , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
  46                 , throw_outside = function(ex) {
  47                         (view.setImmediate || view.setTimeout)(function() {
  48                                 throw ex;
  49                         }, 0);
  50                 }
  51                 , force_saveable_type = "application/octet-stream"
  52                 , fs_min_size = 0
  53                 , deletion_queue = []
  54                 , process_deletion_queue = function() {
  55                         var i = deletion_queue.length;
  56                         while (i--) {
  57                                 var file = deletion_queue[i];
  58                                 if (typeof file === "string") { // file is an object URL
  59                                         URL.revokeObjectURL(file);
  60                                 } else { // file is a File
  61                                         file.remove();
  62                                 }
  63                         }
  64                         deletion_queue.length = 0; // clear queue
  65                 }
  66                 , dispatch = function(filesaver, event_types, event) {
  67                         event_types = [].concat(event_types);
  68                         var i = event_types.length;
  69                         while (i--) {
  70                                 var listener = filesaver["on" + event_types[i]];
  71                                 if (typeof listener === "function") {
  72                                         try {
  73                                                 listener.call(filesaver, event || filesaver);
  74                                         } catch (ex) {
  75                                                 throw_outside(ex);
  76                                         }
  77                                 }
  78                         }
  79                 }
  80                 , FileSaver = function(blob, name) {
  81                         // First try a.download, then web filesystem, then object URLs
  82                         var
  83                                   filesaver = this
  84                                 , type = blob.type
  85                                 , blob_changed = false
  86                                 , object_url
  87                                 , target_view
  88                                 , get_object_url = function() {
  89                                         var object_url = get_URL().createObjectURL(blob);
  90                                         deletion_queue.push(object_url);
  91                                         return object_url;
  92                                 }
  93                                 , dispatch_all = function() {
  94                                         dispatch(filesaver, "writestart progress write writeend".split(" "));
  95                                 }
  96                                 // on any filesys errors revert to saving with object URLs
  97                                 , fs_error = function() {
  98                                         // don't create more object URLs than needed
  99                                         if (blob_changed || !object_url) {
 100                                                 object_url = get_object_url(blob);
 101                                         }
 102                                         if (target_view) {
 103                                                 target_view.location.href = object_url;
 104                                         } else {
 105                                                 window.open(object_url, "_blank");
 106                                         }
 107                                         filesaver.readyState = filesaver.DONE;
 108                                         dispatch_all();
 109                                 }
 110                                 , abortable = function(func) {
 111                                         return function() {
 112                                                 if (filesaver.readyState !== filesaver.DONE) {
 113                                                         return func.apply(this, arguments);
 114                                                 }
 115                                         };
 116                                 }
 117                                 , create_if_not_found = {create: true, exclusive: false}
 118                                 , slice
 119                         ;
 120                         filesaver.readyState = filesaver.INIT;
 121                         if (!name) {
 122                                 name = "download";
 123                         }
 124                         if (can_use_save_link) {
 125                                 object_url = get_object_url(blob);
 126                                 // FF for Android has a nasty garbage collection mechanism
 127                                 // that turns all objects that are not pure javascript into 'deadObject'
 128                                 // this means `doc` and `save_link` are unusable and need to be recreated
 129                                 // `view` is usable though:
 130                                 doc = view.document;
 131                                 save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a");
 132                                 save_link.href = object_url;
 133                                 save_link.download = name;
 134                                 var event = doc.createEvent("MouseEvents");
 135                                 event.initMouseEvent(
 136                                         "click", true, false, view, 0, 0, 0, 0, 0
 137                                         , false, false, false, false, 0, null
 138                                 );
 139                                 save_link.dispatchEvent(event);
 140                                 filesaver.readyState = filesaver.DONE;
 141                                 dispatch_all();
 142                                 return;
 143                         }
 144                         // Object and web filesystem URLs have a problem saving in Google Chrome when
 145                         // viewed in a tab, so I force save with application/octet-stream
 146                         // http://code.google.com/p/chromium/issues/detail?id=91158
 147                         if (view.chrome && type && type !== force_saveable_type) {
 148                                 slice = blob.slice || blob.webkitSlice;
 149                                 blob = slice.call(blob, 0, blob.size, force_saveable_type);
 150                                 blob_changed = true;
 151                         }
 152                         // Since I can't be sure that the guessed media type will trigger a download
 153                         // in WebKit, I append .download to the filename.
 154                         // https://bugs.webkit.org/show_bug.cgi?id=65440
 155                         if (webkit_req_fs && name !== "download") {
 156                                 name += ".download";
 157                         }
 158                         if (type === force_saveable_type || webkit_req_fs) {
 159                                 target_view = view;
 160                         }
 161                         if (!req_fs) {
 162                                 fs_error();
 163                                 return;
 164                         }
 165                         fs_min_size += blob.size;
 166                         req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
 167                                 fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
 168                                         var save = function() {
 169                                                 dir.getFile(name, create_if_not_found, abortable(function(file) {
 170                                                         file.createWriter(abortable(function(writer) {
 171                                                                 writer.onwriteend = function(event) {
 172                                                                         target_view.location.href = file.toURL();
 173                                                                         deletion_queue.push(file);
 174                                                                         filesaver.readyState = filesaver.DONE;
 175                                                                         dispatch(filesaver, "writeend", event);
 176                                                                 };
 177                                                                 writer.onerror = function() {
 178                                                                         var error = writer.error;
 179                                                                         if (error.code !== error.ABORT_ERR) {
 180                                                                                 fs_error();
 181                                                                         }
 182                                                                 };
 183                                                                 "writestart progress write abort".split(" ").forEach(function(event) {
 184                                                                         writer["on" + event] = filesaver["on" + event];
 185                                                                 });
 186                                                                 writer.write(blob);
 187                                                                 filesaver.abort = function() {
 188                                                                         writer.abort();
 189                                                                         filesaver.readyState = filesaver.DONE;
 190                                                                 };
 191                                                                 filesaver.readyState = filesaver.WRITING;
 192                                                         }), fs_error);
 193                                                 }), fs_error);
 194                                         };
 195                                         dir.getFile(name, {create: false}, abortable(function(file) {
 196                                                 // delete file if it already exists
 197                                                 file.remove();
 198                                                 save();
 199                                         }), abortable(function(ex) {
 200                                                 if (ex.code === ex.NOT_FOUND_ERR) {
 201                                                         save();
 202                                                 } else {
 203                                                         fs_error();
 204                                                 }
 205                                         }));
 206                                 }), fs_error);
 207                         }), fs_error);
 208                 }
 209                 , FS_proto = FileSaver.prototype
 210                 , saveAs = function(blob, name) {
 211                         return new FileSaver(blob, name);
 212                 }
 213         ;
 214         FS_proto.abort = function() {
 215                 var filesaver = this;
 216                 filesaver.readyState = filesaver.DONE;
 217                 dispatch(filesaver, "abort");
 218         };
 219         FS_proto.readyState = FS_proto.INIT = 0;
 220         FS_proto.WRITING = 1;
 221         FS_proto.DONE = 2;
 222
 223         FS_proto.error =
 224         FS_proto.onwritestart =
 225         FS_proto.onprogress =
 226         FS_proto.onwrite =
 227         FS_proto.onabort =
 228         FS_proto.onerror =
 229         FS_proto.onwriteend =
 230                 null;
 231
 232         view.addEventListener("unload", process_deletion_queue, false);
 233         saveAs.unload = function() {
 234                 process_deletion_queue();
 235                 view.removeEventListener("unload", process_deletion_queue, false);
 236         };
 237         return saveAs;
 238 }(
 239            typeof self !== "undefined" && self
 240         || typeof window !== "undefined" && window
 241         || this.content
 242 ));
 243 // `self` is undefined in Firefox for Android content script context
 244 // while `this` is nsIContentFrameMessageManager
 245 // with an attribute `content` that corresponds to the window
 246
 247 if (typeof module !== "undefined") module.exports = saveAs;