| .. | .. |
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| 1 | +/* FileSaver.js |
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| 2 | + * A saveAs() FileSaver implementation. |
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| 3 | + * 2014-08-29 |
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| 4 | + * |
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| 5 | + * By Eli Grey, http://eligrey.com |
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| 6 | + * License: X11/MIT |
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| 7 | + * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md |
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| 8 | + */ |
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| 9 | + |
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| 10 | +/*global self */ |
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| 11 | +/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ |
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| 12 | + |
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| 13 | +/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ |
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| 14 | + |
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| 15 | +var saveAs = saveAs |
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| 16 | + // IE 10+ (native saveAs) |
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| 17 | + || (typeof navigator !== "undefined" && |
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| 18 | + navigator.msSaveOrOpenBlob && navigator.msSaveOrOpenBlob.bind(navigator)) |
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| 19 | + // Everyone else |
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| 20 | + || (function(view) { |
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| 21 | + "use strict"; |
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| 22 | + // IE <10 is explicitly unsupported |
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| 23 | + if (typeof navigator !== "undefined" && |
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| 24 | + /MSIE [1-9]\./.test(navigator.userAgent)) { |
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| 25 | + return; |
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| 26 | + } |
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| 27 | + var |
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| 28 | + doc = view.document |
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| 29 | + // only get URL when necessary in case Blob.js hasn't overridden it yet |
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| 30 | + , get_URL = function() { |
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| 31 | + return view.URL || view.webkitURL || view; |
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| 32 | + } |
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| 33 | + , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") |
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| 34 | + , can_use_save_link = "download" in save_link |
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| 35 | + , click = function(node) { |
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| 36 | + var event = doc.createEvent("MouseEvents"); |
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| 37 | + event.initMouseEvent( |
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| 38 | + "click", true, false, view, 0, 0, 0, 0, 0 |
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| 39 | + , false, false, false, false, 0, null |
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| 40 | + ); |
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| 41 | + node.dispatchEvent(event); |
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| 42 | + } |
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| 43 | + , webkit_req_fs = view.webkitRequestFileSystem |
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| 44 | + , req_fs = view.requestFileSystem || webkit_req_fs || view.mozRequestFileSystem |
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| 45 | + , throw_outside = function(ex) { |
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| 46 | + (view.setImmediate || view.setTimeout)(function() { |
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| 47 | + throw ex; |
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| 48 | + }, 0); |
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| 49 | + } |
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| 50 | + , force_saveable_type = "application/octet-stream" |
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| 51 | + , fs_min_size = 0 |
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| 52 | + // See https://code.google.com/p/chromium/issues/detail?id=375297#c7 for |
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| 53 | + // the reasoning behind the timeout and revocation flow |
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| 54 | + , arbitrary_revoke_timeout = 10 |
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| 55 | + , revoke = function(file) { |
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| 56 | + var revoker = function() { |
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| 57 | + if (typeof file === "string") { // file is an object URL |
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| 58 | + get_URL().revokeObjectURL(file); |
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| 59 | + } else { // file is a File |
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| 60 | + file.remove(); |
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| 61 | + } |
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| 62 | + }; |
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| 63 | + if (view.chrome) { |
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| 64 | + revoker(); |
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| 65 | + } else { |
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| 66 | + setTimeout(revoker, arbitrary_revoke_timeout); |
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| 67 | + } |
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| 68 | + } |
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| 69 | + , dispatch = function(filesaver, event_types, event) { |
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| 70 | + event_types = [].concat(event_types); |
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| 71 | + var i = event_types.length; |
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| 72 | + while (i--) { |
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| 73 | + var listener = filesaver["on" + event_types[i]]; |
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| 74 | + if (typeof listener === "function") { |
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| 75 | + try { |
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| 76 | + listener.call(filesaver, event || filesaver); |
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| 77 | + } catch (ex) { |
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| 78 | + throw_outside(ex); |
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| 79 | + } |
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| 80 | + } |
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| 81 | + } |
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| 82 | + } |
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| 83 | + , FileSaver = function(blob, name) { |
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| 84 | + // First try a.download, then web filesystem, then object URLs |
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| 85 | + var |
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| 86 | + filesaver = this |
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| 87 | + , type = blob.type |
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| 88 | + , blob_changed = false |
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| 89 | + , object_url |
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| 90 | + , target_view |
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| 91 | + , dispatch_all = function() { |
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| 92 | + dispatch(filesaver, "writestart progress write writeend".split(" ")); |
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| 93 | + } |
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| 94 | + // on any filesys errors revert to saving with object URLs |
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| 95 | + , fs_error = function() { |
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| 96 | + // don't create more object URLs than needed |
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| 97 | + if (blob_changed || !object_url) { |
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| 98 | + object_url = get_URL().createObjectURL(blob); |
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| 99 | + } |
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| 100 | + if (target_view) { |
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| 101 | + target_view.location.href = object_url; |
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| 102 | + } else { |
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| 103 | + var new_tab = view.open(object_url, "_blank"); |
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| 104 | + if (new_tab == undefined && typeof safari !== "undefined") { |
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| 105 | + //Apple do not allow window.open, see http://bit.ly/1kZffRI |
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| 106 | + view.location.href = object_url |
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| 107 | + } |
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| 108 | + } |
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| 109 | + filesaver.readyState = filesaver.DONE; |
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| 110 | + dispatch_all(); |
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| 111 | + revoke(object_url); |
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| 112 | + } |
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| 113 | + , abortable = function(func) { |
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| 114 | + return function() { |
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| 115 | + if (filesaver.readyState !== filesaver.DONE) { |
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| 116 | + return func.apply(this, arguments); |
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| 117 | + } |
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| 118 | + }; |
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| 119 | + } |
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| 120 | + , create_if_not_found = {create: true, exclusive: false} |
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| 121 | + , slice |
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| 122 | + ; |
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| 123 | + filesaver.readyState = filesaver.INIT; |
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| 124 | + if (!name) { |
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| 125 | + name = "download"; |
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| 126 | + } |
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| 127 | + if (can_use_save_link) { |
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| 128 | + //blob = new Blob([ blob ], { type : 'application/json' }); |
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| 129 | + //object_url = (window.URL || window.webkitURL).createObjectURL( blob ); |
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| 130 | + object_url = get_URL().createObjectURL(blob); |
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| 131 | + save_link.href = object_url; |
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| 132 | + save_link.download = name; |
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| 133 | + click(save_link); |
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| 134 | + filesaver.readyState = filesaver.DONE; |
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| 135 | + dispatch_all(); |
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| 136 | + revoke(object_url); |
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| 137 | + return; |
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| 138 | + } |
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| 139 | + // Object and web filesystem URLs have a problem saving in Google Chrome when |
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| 140 | + // viewed in a tab, so I force save with application/octet-stream |
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| 141 | + // http://code.google.com/p/chromium/issues/detail?id=91158 |
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| 142 | + // Update: Google errantly closed 91158, I submitted it again: |
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| 143 | + // https://code.google.com/p/chromium/issues/detail?id=389642 |
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| 144 | + if (view.chrome && type && type !== force_saveable_type) { |
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| 145 | + slice = blob.slice || blob.webkitSlice; |
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| 146 | + blob = slice.call(blob, 0, blob.size, force_saveable_type); |
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| 147 | + blob_changed = true; |
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| 148 | + } |
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| 149 | + // Since I can't be sure that the guessed media type will trigger a download |
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| 150 | + // in WebKit, I append .download to the filename. |
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| 151 | + // https://bugs.webkit.org/show_bug.cgi?id=65440 |
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| 152 | + if (webkit_req_fs && name !== "download") { |
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| 153 | + name += ".download"; |
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| 154 | + } |
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| 155 | + if (type === force_saveable_type || webkit_req_fs) { |
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| 156 | + target_view = view; |
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| 157 | + } |
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| 158 | + if (!req_fs) { |
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| 159 | + fs_error(); |
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| 160 | + return; |
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| 161 | + } |
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| 162 | + fs_min_size += blob.size; |
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| 163 | + req_fs(view.TEMPORARY, fs_min_size, abortable(function(fs) { |
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| 164 | + fs.root.getDirectory("saved", create_if_not_found, abortable(function(dir) { |
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| 165 | + var save = function() { |
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| 166 | + dir.getFile(name, create_if_not_found, abortable(function(file) { |
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| 167 | + file.createWriter(abortable(function(writer) { |
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| 168 | + writer.onwriteend = function(event) { |
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| 169 | + target_view.location.href = file.toURL(); |
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| 170 | + filesaver.readyState = filesaver.DONE; |
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| 171 | + dispatch(filesaver, "writeend", event); |
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| 172 | + revoke(file); |
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| 173 | + }; |
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| 174 | + writer.onerror = function() { |
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| 175 | + var error = writer.error; |
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| 176 | + if (error.code !== error.ABORT_ERR) { |
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| 177 | + fs_error(); |
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| 178 | + } |
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| 179 | + }; |
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| 180 | + "writestart progress write abort".split(" ").forEach(function(event) { |
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| 181 | + writer["on" + event] = filesaver["on" + event]; |
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| 182 | + }); |
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| 183 | + writer.write(blob); |
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| 184 | + filesaver.abort = function() { |
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| 185 | + writer.abort(); |
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| 186 | + filesaver.readyState = filesaver.DONE; |
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| 187 | + }; |
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| 188 | + filesaver.readyState = filesaver.WRITING; |
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| 189 | + }), fs_error); |
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| 190 | + }), fs_error); |
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| 191 | + }; |
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| 192 | + dir.getFile(name, {create: false}, abortable(function(file) { |
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| 193 | + // delete file if it already exists |
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| 194 | + file.remove(); |
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| 195 | + save(); |
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| 196 | + }), abortable(function(ex) { |
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| 197 | + if (ex.code === ex.NOT_FOUND_ERR) { |
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| 198 | + save(); |
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| 199 | + } else { |
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| 200 | + fs_error(); |
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| 201 | + } |
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| 202 | + })); |
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| 203 | + }), fs_error); |
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| 204 | + }), fs_error); |
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| 205 | + } |
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| 206 | + , FS_proto = FileSaver.prototype |
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| 207 | + , saveAs = function(blob, name) { |
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| 208 | + return new FileSaver(blob, name); |
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| 209 | + } |
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| 210 | + ; |
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| 211 | + FS_proto.abort = function() { |
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| 212 | + var filesaver = this; |
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| 213 | + filesaver.readyState = filesaver.DONE; |
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| 214 | + dispatch(filesaver, "abort"); |
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| 215 | + }; |
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| 216 | + FS_proto.readyState = FS_proto.INIT = 0; |
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| 217 | + FS_proto.WRITING = 1; |
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| 218 | + FS_proto.DONE = 2; |
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| 219 | + |
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| 220 | + FS_proto.error = |
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| 221 | + FS_proto.onwritestart = |
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| 222 | + FS_proto.onprogress = |
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| 223 | + FS_proto.onwrite = |
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| 224 | + FS_proto.onabort = |
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| 225 | + FS_proto.onerror = |
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| 226 | + FS_proto.onwriteend = |
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| 227 | + null; |
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| 228 | + |
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| 229 | + return saveAs; |
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| 230 | +}( |
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| 231 | + typeof self !== "undefined" && self |
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| 232 | + || typeof window !== "undefined" && window |
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| 233 | + || this.content |
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| 234 | +)); |
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| 235 | +// `self` is undefined in Firefox for Android content script context |
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| 236 | +// while `this` is nsIContentFrameMessageManager |
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| 237 | +// with an attribute `content` that corresponds to the window |
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| 238 | + |
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| 239 | +if (typeof module !== "undefined" && module !== null) { |
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| 240 | + module.exports = saveAs; |
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| 241 | +} else if ((typeof define !== "undefined" && define !== null) && (define.amd != null)) { |
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| 242 | + define([], function() { |
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| 243 | + return saveAs; |
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| 244 | + }); |
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| 245 | +} |
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