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  • Committer: Suren A. Chilingaryan
  • Date: 2016-03-04 18:30:43 UTC
  • mfrom: (346.1.39 pcitool)
  • Revision ID: csa@suren.me-20160304183043-mjf6xvyermjh5olg
Integrate last part of Python code from Vasiliy Chernov

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/* FileSaver.js
 
2
 * A saveAs() FileSaver implementation.
 
3
 * 1.1.20151003
 
4
 *
 
5
 * By Eli Grey, http://eligrey.com
 
6
 * License: MIT
 
7
 *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
 
8
 */
 
9
 
 
10
/*global self */
 
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/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
 
12
 
 
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/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
 
14
 
 
15
var saveAs = saveAs || (function(view) {
 
16
        "use strict";
 
17
        // IE <10 is explicitly unsupported
 
18
        if (typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) {
 
19
                return;
 
20
        }
 
21
        var
 
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                  doc = view.document
 
23
                  // only get URL when necessary in case Blob.js hasn't overridden it yet
 
24
                , get_URL = function() {
 
25
                        return view.URL || view.webkitURL || view;
 
26
                }
 
27
                , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
 
28
                , can_use_save_link = "download" in save_link
 
29
                , click = function(node) {
 
30
                        var event = new MouseEvent("click");
 
31
                        node.dispatchEvent(event);
 
32
                }
 
33
                , is_safari = /Version\/[\d\.]+.*Safari/.test(navigator.userAgent)
 
34
                , webkit_req_fs = view.webkitRequestFileSystem
 
35
                , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem
 
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
                , fs_min_size = 0
 
43
                // See https://code.google.com/p/chromium/issues/detail?id=375297#c7 and
 
44
                // https://github.com/eligrey/FileSaver.js/commit/485930a#commitcomment-8768047
 
45
                // for the reasoning behind the timeout and revocation flow
 
46
                , arbitrary_revoke_timeout = 500 // in ms
 
47
                , revoke = function(file) {
 
48
                        var revoker = function() {
 
49
                                if (typeof file === "string") { // file is an object URL
 
50
                                        get_URL().revokeObjectURL(file);
 
51
                                } else { // file is a File
 
52
                                        file.remove();
 
53
                                }
 
54
                        };
 
55
                        if (view.chrome) {
 
56
                                revoker();
 
57
                        } else {
 
58
                                setTimeout(revoker, arbitrary_revoke_timeout);
 
59
                        }
 
60
                }
 
61
                , dispatch = function(filesaver, event_types, event) {
 
62
                        event_types = [].concat(event_types);
 
63
                        var i = event_types.length;
 
64
                        while (i--) {
 
65
                                var listener = filesaver["on" + event_types[i]];
 
66
                                if (typeof listener === "function") {
 
67
                                        try {
 
68
                                                listener.call(filesaver, event || filesaver);
 
69
                                        } catch (ex) {
 
70
                                                throw_outside(ex);
 
71
                                        }
 
72
                                }
 
73
                        }
 
74
                }
 
75
                , auto_bom = function(blob) {
 
76
                        // prepend BOM for UTF-8 XML and text/* types (including HTML)
 
77
                        if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
 
78
                                return new Blob(["\ufeff", blob], {type: blob.type});
 
79
                        }
 
80
                        return blob;
 
81
                }
 
82
                , FileSaver = function(blob, name, no_auto_bom) {
 
83
                        if (!no_auto_bom) {
 
84
                                blob = auto_bom(blob);
 
85
                        }
 
86
                        // First try a.download, then web filesystem, then object URLs
 
87
                        var
 
88
                                  filesaver = this
 
89
                                , type = blob.type
 
90
                                , blob_changed = false
 
91
                                , object_url
 
92
                                , target_view
 
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
                                        if (target_view && is_safari && typeof FileReader !== "undefined") {
 
99
                                                // Safari doesn't allow downloading of blob urls
 
100
                                                var reader = new FileReader();
 
101
                                                reader.onloadend = function() {
 
102
                                                        var base64Data = reader.result;
 
103
                                                        target_view.location.href = "data:attachment/file" + base64Data.slice(base64Data.search(/[,;]/));
 
104
                                                        filesaver.readyState = filesaver.DONE;
 
105
                                                        dispatch_all();
 
106
                                                };
 
107
                                                reader.readAsDataURL(blob);
 
108
                                                filesaver.readyState = filesaver.INIT;
 
109
                                                return;
 
110
                                        }
 
111
                                        // don't create more object URLs than needed
 
112
                                        if (blob_changed || !object_url) {
 
113
                                                object_url = get_URL().createObjectURL(blob);
 
114
                                        }
 
115
                                        if (target_view) {
 
116
                                                target_view.location.href = object_url;
 
117
                                        } else {
 
118
                                                var new_tab = view.open(object_url, "_blank");
 
119
                                                if (new_tab == undefined && is_safari) {
 
120
                                                        //Apple do not allow window.open, see http://bit.ly/1kZffRI
 
121
                                                        view.location.href = object_url
 
122
                                                }
 
123
                                        }
 
124
                                        filesaver.readyState = filesaver.DONE;
 
125
                                        dispatch_all();
 
126
                                        revoke(object_url);
 
127
                                }
 
128
                                , abortable = function(func) {
 
129
                                        return function() {
 
130
                                                if (filesaver.readyState !== filesaver.DONE) {
 
131
                                                        return func.apply(this, arguments);
 
132
                                                }
 
133
                                        };
 
134
                                }
 
135
                                , create_if_not_found = {create: true, exclusive: false}
 
136
                                , slice
 
137
                        ;
 
138
                        filesaver.readyState = filesaver.INIT;
 
139
                        if (!name) {
 
140
                                name = "download";
 
141
                        }
 
142
                        if (can_use_save_link) {
 
143
                                object_url = get_URL().createObjectURL(blob);
 
144
                                setTimeout(function() {
 
145
                                        save_link.href = object_url;
 
146
                                        save_link.download = name;
 
147
                                        click(save_link);
 
148
                                        dispatch_all();
 
149
                                        revoke(object_url);
 
150
                                        filesaver.readyState = filesaver.DONE;
 
151
                                });
 
152
                                return;
 
153
                        }
 
154
                        // Object and web filesystem URLs have a problem saving in Google Chrome when
 
155
                        // viewed in a tab, so I force save with application/octet-stream
 
156
                        // http://code.google.com/p/chromium/issues/detail?id=91158
 
157
                        // Update: Google errantly closed 91158, I submitted it again:
 
158
                        // https://code.google.com/p/chromium/issues/detail?id=389642
 
159
                        if (view.chrome && type && type !== force_saveable_type) {
 
160
                                slice = blob.slice || blob.webkitSlice;
 
161
                                blob = slice.call(blob, 0, blob.size, force_saveable_type);
 
162
                                blob_changed = true;
 
163
                        }
 
164
                        // Since I can't be sure that the guessed media type will trigger a download
 
165
                        // in WebKit, I append .download to the filename.
 
166
                        // https://bugs.webkit.org/show_bug.cgi?id=65440
 
167
                        if (webkit_req_fs && name !== "download") {
 
168
                                name += ".download";
 
169
                        }
 
170
                        if (type === force_saveable_type || webkit_req_fs) {
 
171
                                target_view = view;
 
172
                        }
 
173
                        if (!req_fs) {
 
174
                                fs_error();
 
175
                                return;
 
176
                        }
 
177
                        fs_min_size += blob.size;
 
178
                        req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) {
 
179
                                fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) {
 
180
                                        var save = function() {
 
181
                                                dir.getFile(name, create_if_not_found, abortable(function(file) {
 
182
                                                        file.createWriter(abortable(function(writer) {
 
183
                                                                writer.onwriteend = function(event) {
 
184
                                                                        target_view.location.href = file.toURL();
 
185
                                                                        filesaver.readyState = filesaver.DONE;
 
186
                                                                        dispatch(filesaver, "writeend", event);
 
187
                                                                        revoke(file);
 
188
                                                                };
 
189
                                                                writer.onerror = function() {
 
190
                                                                        var error = writer.error;
 
191
                                                                        if (error.code !== error.ABORT_ERR) {
 
192
                                                                                fs_error();
 
193
                                                                        }
 
194
                                                                };
 
195
                                                                "writestart progress write abort".split(" ").forEach(function(event) {
 
196
                                                                        writer["on" + event] = filesaver["on" + event];
 
197
                                                                });
 
198
                                                                writer.write(blob);
 
199
                                                                filesaver.abort = function() {
 
200
                                                                        writer.abort();
 
201
                                                                        filesaver.readyState = filesaver.DONE;
 
202
                                                                };
 
203
                                                                filesaver.readyState = filesaver.WRITING;
 
204
                                                        }), fs_error);
 
205
                                                }), fs_error);
 
206
                                        };
 
207
                                        dir.getFile(name, {create: false}, abortable(function(file) {
 
208
                                                // delete file if it already exists
 
209
                                                file.remove();
 
210
                                                save();
 
211
                                        }), abortable(function(ex) {
 
212
                                                if (ex.code === ex.NOT_FOUND_ERR) {
 
213
                                                        save();
 
214
                                                } else {
 
215
                                                        fs_error();
 
216
                                                }
 
217
                                        }));
 
218
                                }), fs_error);
 
219
                        }), fs_error);
 
220
                }
 
221
                , FS_proto = FileSaver.prototype
 
222
                , saveAs = function(blob, name, no_auto_bom) {
 
223
                        return new FileSaver(blob, name, no_auto_bom);
 
224
                }
 
225
        ;
 
226
        // IE 10+ (native saveAs)
 
227
        if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
 
228
                return function(blob, name, no_auto_bom) {
 
229
                        if (!no_auto_bom) {
 
230
                                blob = auto_bom(blob);
 
231
                        }
 
232
                        return navigator.msSaveOrOpenBlob(blob, name || "download");
 
233
                };
 
234
        }
 
235
 
 
236
        FS_proto.abort = function() {
 
237
                var filesaver = this;
 
238
                filesaver.readyState = filesaver.DONE;
 
239
                dispatch(filesaver, "abort");
 
240
        };
 
241
        FS_proto.readyState = FS_proto.INIT = 0;
 
242
        FS_proto.WRITING = 1;
 
243
        FS_proto.DONE = 2;
 
244
 
 
245
        FS_proto.error =
 
246
        FS_proto.onwritestart =
 
247
        FS_proto.onprogress =
 
248
        FS_proto.onwrite =
 
249
        FS_proto.onabort =
 
250
        FS_proto.onerror =
 
251
        FS_proto.onwriteend =
 
252
                null;
 
253
 
 
254
        return saveAs;
 
255
}(
 
256
           typeof self !== "undefined" && self
 
257
        || typeof window !== "undefined" && window
 
258
        || this.content
 
259
));
 
260
// `self` is undefined in Firefox for Android content script context
 
261
// while `this` is nsIContentFrameMessageManager
 
262
// with an attribute `content` that corresponds to the window
 
263
 
 
264
if (typeof module !== "undefined" && module.exports) {
 
265
  module.exports.saveAs = saveAs;
 
266
} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) {
 
267
  define([], function() {
 
268
    return saveAs;
 
269
  });
 
270
}