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TiddlyWiki5/core/modules/widgets/action-sendmessage.js
Jermolene d93c19daaa Improve the format of widget message parameters
In 5.1.3 we introduced the idea that the `event.param` variable could
optionally be a hashmap, allowing multiple values to be passed with the
message.

This change moves the hashmap to a separate `event.paramObject`
variable, allowing us to pass both a hashmap and a param string.
2014-11-07 14:52:32 +00:00

77 lines
1.8 KiB
JavaScript

/*\
title: $:/core/modules/widgets/action-sendmessage.js
type: application/javascript
module-type: widget
Action widget to send a message
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
var Widget = require("$:/core/modules/widgets/widget.js").widget;
var SendMessageWidget = function(parseTreeNode,options) {
this.initialise(parseTreeNode,options);
};
/*
Inherit from the base widget class
*/
SendMessageWidget.prototype = new Widget();
/*
Render this widget into the DOM
*/
SendMessageWidget.prototype.render = function(parent,nextSibling) {
this.computeAttributes();
this.execute();
};
/*
Compute the internal state of the widget
*/
SendMessageWidget.prototype.execute = function() {
this.actionMessage = this.getAttribute("$message");
this.actionParam = this.getAttribute("$param");
};
/*
Refresh the widget by ensuring our attributes are up to date
*/
SendMessageWidget.prototype.refresh = function(changedTiddlers) {
var changedAttributes = this.computeAttributes();
if(changedAttributes["$message"] || changedAttributes["$param"]) {
this.refreshSelf();
return true;
}
return this.refreshChildren(changedTiddlers);
};
/*
Invoke the action associated with this widget
*/
SendMessageWidget.prototype.invokeAction = function(triggeringWidget,event) {
// Get the string parameter
var param = this.actionParam;
// Assemble the attributes as a hashmap
var paramObject = Object.create(null);
var count = 0;
$tw.utils.each(this.attributes,function(attribute,name) {
if(name.charAt(0) !== "$") {
paramObject[name] = attribute;
count++;
}
});
// Dispatch the message
this.dispatchEvent({type: this.actionMessage, param: param, paramObject: paramObject, tiddlerTitle: this.getVariable("currentTiddler")});
return true; // Action was invoked
};
exports["action-sendmessage"] = SendMessageWidget;
})();