mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2025-12-13 12:18:05 +00:00
8168512e95
* Support for downloading base64 files * Added comment explaining why we'd use data urls over blobs * Using more modern string##includes method
86 lines
2.2 KiB
JavaScript
86 lines
2.2 KiB
JavaScript
/*\
|
|
title: $:/core/modules/savers/download.js
|
|
type: application/javascript
|
|
module-type: saver
|
|
|
|
Handles saving changes via HTML5's download APIs
|
|
|
|
\*/
|
|
|
|
"use strict";
|
|
|
|
/*
|
|
Select the appropriate saver module and set it up
|
|
*/
|
|
var DownloadSaver = function(wiki) {
|
|
};
|
|
|
|
DownloadSaver.prototype.save = function(text,method,callback,options) {
|
|
options = options || {};
|
|
// Get the current filename
|
|
var filename = options.variables.filename;
|
|
var type = options.variables.type;
|
|
if(!filename) {
|
|
var p = document.location.pathname.lastIndexOf("/");
|
|
if(p !== -1) {
|
|
// We decode the pathname because document.location is URL encoded by the browser
|
|
filename = $tw.utils.decodeURIComponentSafe(document.location.pathname.substr(p+1));
|
|
}
|
|
}
|
|
if(!filename) {
|
|
filename = "tiddlywiki.html";
|
|
}
|
|
if(!type) {
|
|
type = "text/html";
|
|
}
|
|
// Set up the link
|
|
var link = document.createElement("a");
|
|
// We prefer Blobs if they're available, unless we're dealing with a tiddler type declaring itself full of base64 encoded content.
|
|
// Then we use data urls, because browsers will know to decode the stream and download the actual binary file as intended.
|
|
if(Blob !== undefined && !type.includes(";base64")) {
|
|
var blob = new Blob([text], {type: type});
|
|
link.setAttribute("href", URL.createObjectURL(blob));
|
|
} else {
|
|
link.setAttribute("href","data:" + type + "," + encodeURIComponent(text));
|
|
}
|
|
link.setAttribute("download",filename);
|
|
document.body.appendChild(link);
|
|
link.click();
|
|
document.body.removeChild(link);
|
|
// Callback that we succeeded
|
|
callback(null);
|
|
return true;
|
|
};
|
|
|
|
/*
|
|
Information about this saver
|
|
*/
|
|
DownloadSaver.prototype.info = {
|
|
name: "download",
|
|
priority: 100
|
|
};
|
|
|
|
Object.defineProperty(DownloadSaver.prototype.info, "capabilities", {
|
|
get: function() {
|
|
var capabilities = ["save", "download"];
|
|
if(($tw.wiki.getTextReference("$:/config/DownloadSaver/AutoSave") || "").toLowerCase() === "yes") {
|
|
capabilities.push("autosave");
|
|
}
|
|
return capabilities;
|
|
}
|
|
});
|
|
|
|
/*
|
|
Static method that returns true if this saver is capable of working
|
|
*/
|
|
exports.canSave = function(wiki) {
|
|
return document.createElement("a").download !== undefined;
|
|
};
|
|
|
|
/*
|
|
Create an instance of this saver
|
|
*/
|
|
exports.create = function(wiki) {
|
|
return new DownloadSaver(wiki);
|
|
};
|