Open-ILS/web/js/file-saver/FileSaver.js

   1 /* FileSaver.js
   2  * A saveAs() FileSaver implementation.
   3  * 1.3.2
   4  * 2016-06-16 18:25:19
   5  *
   6  * By Eli Grey, http://eligrey.com
   7  * License: MIT
   8  *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
   9  */
  10
  11 /*global self */
  12 /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
  13
  14 /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
  15
  16 var saveAs = saveAs || (function(view) {
  17         "use strict";
  18         // IE <10 is explicitly unsupported
  19         if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) {
  20                 return;
  21         }
  22         var
  23                   doc = view.document
  24                   // only get URL when necessary in case Blob.js hasn't overridden it yet
  25                 , get_URL = function() {
  26                         return view.URL || view.webkitURL || view;
  27                 }
  28                 , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
  29                 , can_use_save_link = "download" in save_link
  30                 , click = function(node) {
  31                         var event = new MouseEvent("click");
  32                         node.dispatchEvent(event);
  33                 }
  34                 , is_safari = /constructor/i.test(view.HTMLElement) || view.safari
  35                 , is_chrome_ios =/CriOS\/[\d]+/.test(navigator.userAgent)
  36                 , throw_outside = function(ex) {
  37                         (view.setImmediate || view.setTimeout)(function() {
  38                                 throw ex;
  39                         }, 0);
  40                 }
  41                 , force_saveable_type = "application/octet-stream"
  42                 // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to
  43                 , arbitrary_revoke_timeout = 1000 * 40 // in ms
  44                 , revoke = function(file) {
  45                         var revoker = function() {
  46                                 if (typeof file === "string") { // file is an object URL
  47                                         get_URL().revokeObjectURL(file);
  48                                 } else { // file is a File
  49                                         file.remove();
  50                                 }
  51                         };
  52                         setTimeout(revoker, arbitrary_revoke_timeout);
  53                 }
  54                 , dispatch = function(filesaver, event_types, event) {
  55                         event_types = [].concat(event_types);
  56                         var i = event_types.length;
  57                         while (i--) {
  58                                 var listener = filesaver["on" + event_types[i]];
  59                                 if (typeof listener === "function") {
  60                                         try {
  61                                                 listener.call(filesaver, event || filesaver);
  62                                         } catch (ex) {
  63                                                 throw_outside(ex);
  64                                         }
  65                                 }
  66                         }
  67                 }
  68                 , auto_bom = function(blob) {
  69                         // prepend BOM for UTF-8 XML and text/* types (including HTML)
  70                         // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
  71                         if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
  72                                 return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type});
  73                         }
  74                         return blob;
  75                 }
  76                 , FileSaver = function(blob, name, no_auto_bom) {
  77                         if (!no_auto_bom) {
  78                                 blob = auto_bom(blob);
  79                         }
  80                         // First try a.download, then web filesystem, then object URLs
  81                         var
  82                                   filesaver = this
  83                                 , type = blob.type
  84                                 , force = type === force_saveable_type
  85                                 , object_url
  86                                 , dispatch_all = function() {
  87                                         dispatch(filesaver, "writestart progress write writeend".split(" "));
  88                                 }
  89                                 // on any filesys errors revert to saving with object URLs
  90                                 , fs_error = function() {
  91                                         if ((is_chrome_ios || (force && is_safari)) && view.FileReader) {
  92                                                 // Safari doesn't allow downloading of blob urls
  93                                                 var reader = new FileReader();
  94                                                 reader.onloadend = function() {
  95                                                         var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, 'data:attachment/file;');
  96                                                         var popup = view.open(url, '_blank');
  97                                                         if(!popup) view.location.href = url;
  98                                                         url=undefined; // release reference before dispatching
  99                                                         filesaver.readyState = filesaver.DONE;
 100                                                         dispatch_all();
 101                                                 };
 102                                                 reader.readAsDataURL(blob);
 103                                                 filesaver.readyState = filesaver.INIT;
 104                                                 return;
 105                                         }
 106                                         // don't create more object URLs than needed
 107                                         if (!object_url) {
 108                                                 object_url = get_URL().createObjectURL(blob);
 109                                         }
 110                                         if (force) {
 111                                                 view.location.href = object_url;
 112                                         } else {
 113                                                 var opened = view.open(object_url, "_blank");
 114                                                 if (!opened) {
 115                                                         // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
 116                                                         view.location.href = object_url;
 117                                                 }
 118                                         }
 119                                         filesaver.readyState = filesaver.DONE;
 120                                         dispatch_all();
 121                                         revoke(object_url);
 122                                 }
 123                         ;
 124                         filesaver.readyState = filesaver.INIT;
 125
 126                         if (can_use_save_link) {
 127                                 object_url = get_URL().createObjectURL(blob);
 128                                 setTimeout(function() {
 129                                         save_link.href = object_url;
 130                                         save_link.download = name;
 131                                         click(save_link);
 132                                         dispatch_all();
 133                                         revoke(object_url);
 134                                         filesaver.readyState = filesaver.DONE;
 135                                 });
 136                                 return;
 137                         }
 138
 139                         fs_error();
 140                 }
 141                 , FS_proto = FileSaver.prototype
 142                 , saveAs = function(blob, name, no_auto_bom) {
 143                         return new FileSaver(blob, name || blob.name || "download", no_auto_bom);
 144                 }
 145         ;
 146         // IE 10+ (native saveAs)
 147         if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
 148                 return function(blob, name, no_auto_bom) {
 149                         name = name || blob.name || "download";
 150
 151                         if (!no_auto_bom) {
 152                                 blob = auto_bom(blob);
 153                         }
 154                         return navigator.msSaveOrOpenBlob(blob, name);
 155                 };
 156         }
 157
 158         FS_proto.abort = function(){};
 159         FS_proto.readyState = FS_proto.INIT = 0;
 160         FS_proto.WRITING = 1;
 161         FS_proto.DONE = 2;
 162
 163         FS_proto.error =
 164         FS_proto.onwritestart =
 165         FS_proto.onprogress =
 166         FS_proto.onwrite =
 167         FS_proto.onabort =
 168         FS_proto.onerror =
 169         FS_proto.onwriteend =
 170                 null;
 171
 172         return saveAs;
 173 }(
 174            typeof self !== "undefined" && self
 175         || typeof window !== "undefined" && window
 176         || this.content
 177 ));
 178 // `self` is undefined in Firefox for Android content script context
 179 // while `this` is nsIContentFrameMessageManager
 180 // with an attribute `content` that corresponds to the window
 181
 182 if (typeof module !== "undefined" && module.exports) {
 183   module.exports.saveAs = saveAs;
 184 } else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) {
 185   define("FileSaver.js", function() {
 186     return saveAs;
 187   });
 188 }