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TiddlyWiki5/core/modules/widgets/edit-binary.js

108 lines
2.5 KiB
JavaScript

/*\
title: $:/core/modules/widgets/edit-binary.js
type: application/javascript
module-type: widget
Edit-binary widget; placeholder for editing binary tiddlers
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var BINARY_WARNING_MESSAGE = "$:/core/ui/BinaryWarning";
var EXPORT_BUTTON_IMAGE = "$:/core/images/export-button";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var EditBinaryWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
EditBinaryWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
EditBinaryWidget.prototype.render = function(parent,nextSibling) {
var self = this;
// Save the parent dom node
this.parentDomNode = parent;
// Compute our attributes
this.computeAttributes();
// Execute our logic
this.execute();
this.renderChildren(parent,nextSibling);
};
/*
Compute the internal state of the widget
*/
EditBinaryWidget.prototype.execute = function() {
// Get our parameters
var editTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
var tiddler = this.wiki.getTiddler(editTitle);
var type = tiddler.fields.type;
var text = tiddler.fields.text;
// Transclude the binary data tiddler warning message
var warn = {
type: "element",
tag: "p",
children: [{
type: "transclude",
attributes: {
tiddler: {type: "string", value: BINARY_WARNING_MESSAGE}
}
}]
};
// Create download link based on draft tiddler title
var link = {
type: "element",
tag: "a",
attributes: {
title: {type: "indirect", textReference: "!!draft.title"},
download: {type: "indirect", textReference: "!!draft.title"}
},
children: [{
type: "transclude",
attributes: {
tiddler: {type: "string", value: EXPORT_BUTTON_IMAGE}
}
}]
};
// Set the link href to internal data URI (no external)
if(text) {
link.attributes.href = {
type: "string",
value: "data:" + type + ";base64," + text
};
}
// Combine warning message and download link in a div
var element = {
type: "element",
tag: "div",
attributes: {
class: {type: "string", value: "tc-binary-warning"}
},
children: [warn, link]
}
// Construct the child widgets
this.makeChildWidgets([element]);
};
/*
Refresh by refreshing our child widget
*/
EditBinaryWidget.prototype.refresh = function(changedTiddlers) {
return this.refreshChildren(changedTiddlers);
};
exports["edit-binary"] = EditBinaryWidget;
})();