source: EcnlProtoTool/trunk/webapp/webmrbc/js/FileSaver.js@ 270

Last change on this file since 270 was 270, checked in by coas-nagasima, 7 years ago

mruby版ECNLプロトタイピング・ツールを追加
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  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/javascript
File size: 7.3 KB
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1/* FileSaver.js
2 * A saveAs() FileSaver implementation.
3 * 2014-08-29
4 *
5 * By Eli Grey, http://eligrey.com
6 * License: X11/MIT
7 * See https://github.com/eligrey/FileSaver.js/blob/master/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
15var 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 Blob.js hasn't overridden it yet
30 , get_URL = function() {
31 return view.URL || view.webkitURL || view;
32 }
33 , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
34 , can_use_save_link = "download" in save_link
35 , click = function(node) {
36 var event = doc.createEvent("MouseEvents");
37 event.initMouseEvent(
38 "click", true, false, view, 0, 0, 0, 0, 0
39 , false, false, false, false, 0, null
40 );
41 node.dispatchEvent(event);
42 }
43 , webkit_req_fs = view.webkitRequestFileSystem
44 , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
45 , throw_outside = function(ex) {
46 (view.setImmediate || view.setTimeout)(function() {
47 throw ex;
48 }, 0);
49 }
50 , force_saveable_type = "application/octet-stream"
51 , fs_min_size = 0
52 // See https://code.google.com/p/chromium/issues/detail?id=375297#c7 for
53 // the reasoning behind the timeout and revocation flow
54 , arbitrary_revoke_timeout = 10
55 , revoke = function(file) {
56 var revoker = function() {
57 if (typeof file === "string") { // file is an object URL
58 get_URL().revokeObjectURL(file);
59 } else { // file is a File
60 file.remove();
61 }
62 };
63 if (view.chrome) {
64 revoker();
65 } else {
66 setTimeout(revoker, arbitrary_revoke_timeout);
67 }
68 }
69 , dispatch = function(filesaver, event_types, event) {
70 event_types = [].concat(event_types);
71 var i = event_types.length;
72 while (i--) {
73 var listener = filesaver["on" + event_types[i]];
74 if (typeof listener === "function") {
75 try {
76 listener.call(filesaver, event || filesaver);
77 } catch (ex) {
78 throw_outside(ex);
79 }
80 }
81 }
82 }
83 , FileSaver = function(blob, name) {
84 // First try a.download, then web filesystem, then object URLs
85 var
86 filesaver = this
87 , type = blob.type
88 , blob_changed = false
89 , object_url
90 , target_view
91 , dispatch_all = function() {
92 dispatch(filesaver, "writestart progress write writeend".split(" "));
93 }
94 // on any filesys errors revert to saving with object URLs
95 , fs_error = function() {
96 // don't create more object URLs than needed
97 if (blob_changed || !object_url) {
98 object_url = get_URL().createObjectURL(blob);
99 }
100 if (target_view) {
101 target_view.location.href = object_url;
102 } else {
103 var new_tab = view.open(object_url, "_blank");
104 if (new_tab == undefined && typeof safari !== "undefined") {
105 //Apple do not allow window.open, see http://bit.ly/1kZffRI
106 view.location.href = object_url
107 }
108 }
109 filesaver.readyState = filesaver.DONE;
110 dispatch_all();
111 revoke(object_url);
112 }
113 , abortable = function(func) {
114 return function() {
115 if (filesaver.readyState !== filesaver.DONE) {
116 return func.apply(this, arguments);
117 }
118 };
119 }
120 , create_if_not_found = {create: true, exclusive: false}
121 , slice
122 ;
123 filesaver.readyState = filesaver.INIT;
124 if (!name) {
125 name = "download";
126 }
127 if (can_use_save_link) {
128 object_url = get_URL().createObjectURL(blob);
129 save_link.href = object_url;
130 save_link.download = name;
131 click(save_link);
132 filesaver.readyState = filesaver.DONE;
133 dispatch_all();
134 revoke(object_url);
135 return;
136 }
137 // Object and web filesystem URLs have a problem saving in Google Chrome when
138 // viewed in a tab, so I force save with application/octet-stream
139 // http://code.google.com/p/chromium/issues/detail?id=91158
140 // Update: Google errantly closed 91158, I submitted it again:
141 // https://code.google.com/p/chromium/issues/detail?id=389642
142 if (view.chrome && type && type !== force_saveable_type) {
143 slice = blob.slice || blob.webkitSlice;
144 blob = slice.call(blob, 0, blob.size, force_saveable_type);
145 blob_changed = true;
146 }
147 // Since I can't be sure that the guessed media type will trigger a download
148 // in WebKit, I append .download to the filename.
149 // https://bugs.webkit.org/show_bug.cgi?id=65440
150 if (webkit_req_fs && name !== "download") {
151 name += ".download";
152 }
153 if (type === force_saveable_type || webkit_req_fs) {
154 target_view = view;
155 }
156 if (!req_fs) {
157 fs_error();
158 return;
159 }
160 fs_min_size += blob.size;
161 req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
162 fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
163 var save = function() {
164 dir.getFile(name, create_if_not_found, abortable(function(file) {
165 file.createWriter(abortable(function(writer) {
166 writer.onwriteend = function(event) {
167 target_view.location.href = file.toURL();
168 filesaver.readyState = filesaver.DONE;
169 dispatch(filesaver, "writeend", event);
170 revoke(file);
171 };
172 writer.onerror = function() {
173 var error = writer.error;
174 if (error.code !== error.ABORT_ERR) {
175 fs_error();
176 }
177 };
178 "writestart progress write abort".split(" ").forEach(function(event) {
179 writer["on" + event] = filesaver["on" + event];
180 });
181 writer.write(blob);
182 filesaver.abort = function() {
183 writer.abort();
184 filesaver.readyState = filesaver.DONE;
185 };
186 filesaver.readyState = filesaver.WRITING;
187 }), fs_error);
188 }), fs_error);
189 };
190 dir.getFile(name, {create: false}, abortable(function(file) {
191 // delete file if it already exists
192 file.remove();
193 save();
194 }), abortable(function(ex) {
195 if (ex.code === ex.NOT_FOUND_ERR) {
196 save();
197 } else {
198 fs_error();
199 }
200 }));
201 }), fs_error);
202 }), fs_error);
203 }
204 , FS_proto = FileSaver.prototype
205 , saveAs = function(blob, name) {
206 return new FileSaver(blob, name);
207 }
208 ;
209 FS_proto.abort = function() {
210 var filesaver = this;
211 filesaver.readyState = filesaver.DONE;
212 dispatch(filesaver, "abort");
213 };
214 FS_proto.readyState = FS_proto.INIT = 0;
215 FS_proto.WRITING = 1;
216 FS_proto.DONE = 2;
217
218 FS_proto.error =
219 FS_proto.onwritestart =
220 FS_proto.onprogress =
221 FS_proto.onwrite =
222 FS_proto.onabort =
223 FS_proto.onerror =
224 FS_proto.onwriteend =
225 null;
226
227 return saveAs;
228}(
229 typeof self !== "undefined" && self
230 || typeof window !== "undefined" && window
231 || this.content
232));
233// `self` is undefined in Firefox for Android content script context
234// while `this` is nsIContentFrameMessageManager
235// with an attribute `content` that corresponds to the window
236
237if (typeof module !== "undefined" && module !== null) {
238 module.exports = saveAs;
239} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
240 define([], function() {
241 return saveAs;
242 });
243}
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