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/*! FileSaver.js | ||
* A saveAs() FileSaver implementation. | ||
* 2014-01-24 | ||
* | ||
* By Eli Grey, http://eligrey.com | ||
* License: X11/MIT | ||
* See LICENSE.md | ||
*/ | ||
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/*global self */ | ||
/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ | ||
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/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ | ||
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var saveAs = saveAs | ||
// IE 10+ (native saveAs) | ||
|| (typeof navigator !== "undefined" && | ||
navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator)) | ||
// Everyone else | ||
|| (function (view) { | ||
"use strict"; | ||
// IE <10 is explicitly unsupported | ||
if (typeof navigator !== "undefined" && | ||
/MSIE [1-9]\./.test(navigator.userAgent)) { | ||
return; | ||
} | ||
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; | ||
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FS_proto.error = | ||
FS_proto.onwritestart = | ||
FS_proto.onprogress = | ||
FS_proto.onwrite = | ||
FS_proto.onabort = | ||
FS_proto.onerror = | ||
FS_proto.onwriteend = | ||
null; | ||
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view.addEventListener("unload", process_deletion_queue, false); | ||
saveAs.unload = function () { | ||
process_deletion_queue(); | ||
view.removeEventListener("unload", process_deletion_queue, false); | ||
}; | ||
return saveAs; | ||
}( | ||
typeof self !== "undefined" && self | ||
|| typeof window !== "undefined" && 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 | ||
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if (typeof module !== "undefined" && module !== null) { | ||
module.exports = saveAs; | ||
} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) { | ||
define([], function () { | ||
return saveAs; | ||
}); | ||
} |
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