mirror of
https://github.com/flynx/pWiki.git
synced 2025-11-03 20:40:10 +00:00
248 lines
7.6 KiB
JavaScript
Executable File
248 lines
7.6 KiB
JavaScript
Executable File
/*! FileSaver.js
|
|
* A saveAs() FileSaver implementation.
|
|
* 2014-01-24
|
|
*
|
|
* By Eli Grey, http://eligrey.com
|
|
* License: X11/MIT
|
|
* See LICENSE.md
|
|
*/
|
|
|
|
/*global self */
|
|
/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */
|
|
|
|
/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */
|
|
|
|
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;
|
|
|
|
FS_proto.error =
|
|
FS_proto.onwritestart =
|
|
FS_proto.onprogress =
|
|
FS_proto.onwrite =
|
|
FS_proto.onabort =
|
|
FS_proto.onerror =
|
|
FS_proto.onwriteend =
|
|
null;
|
|
|
|
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
|
|
|
|
if (typeof module !== "undefined") module.exports = saveAs;
|