mirror of
https://github.com/Jermolene/TiddlyWiki5
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111 lines
2.8 KiB
JavaScript
111 lines
2.8 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/messagecatcher.js
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type: application/javascript
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module-type: widget
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Message catcher widget
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var Widget = require("$:/core/modules/widgets/widget.js").widget;
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var MessageCatcherWidget = function(parseTreeNode,options) {
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this.initialise(parseTreeNode,options);
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};
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/*
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Inherit from the base widget class
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*/
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MessageCatcherWidget.prototype = new Widget();
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/*
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Render this widget into the DOM
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*/
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MessageCatcherWidget.prototype.render = function(parent,nextSibling) {
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var self = this;
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// Remember parent
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this.parentDomNode = parent;
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// Compute attributes and execute state
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this.computeAttributes();
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this.execute();
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// Helper to add an event handler
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var addEventHandler = function(type,actions) {
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if(type && actions) {
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var isActionStringExecuting = false;
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self.addEventListener(
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type,
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function(event) {
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// Don't trap the event if it came from one of our action handlers
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if(isActionStringExecuting) {
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return true;
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}
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// Collect all the event properties into variables
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var collectProps = function(obj,prefix) {
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prefix = prefix || "";
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var props = {},
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names = [];
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$tw.utils.each(obj,function(value,name) {
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if(["string","boolean","number"].indexOf(typeof value) !== -1) {
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names.push(name);
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props[prefix + "-" + name] = value.toString();
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}
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});
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props["list-" + prefix] = $tw.utils.stringifyList(names);
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return props;
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};
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var variables = $tw.utils.extend(
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{},
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collectProps(event.paramObject,"event-paramObject"),
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collectProps(event,"event"),
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{
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modifier: $tw.keyboardManager.getEventModifierKeyDescriptor(event)
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});
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isActionStringExecuting = true;
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self.invokeActionString(actions,self,event,variables);
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isActionStringExecuting = false;
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return false;
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}
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);
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}
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}
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// Add the main event handler
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addEventHandler(this.getAttribute("type"),this.getAttribute("actions"));
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// Add any other event handlers
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$tw.utils.each(this.attributes,function(value,key) {
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if(key.charAt(0) === "$") {
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addEventHandler(key.slice(1),value);
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}
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});
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// Render children
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this.renderChildren(parent,nextSibling);
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};
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/*
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Compute the internal state of the widget
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*/
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MessageCatcherWidget.prototype.execute = function() {
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// Make child widgets
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this.makeChildWidgets();
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};
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/*
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Selectively refreshes the widget if needed. Returns true if the widget or any of its children needed re-rendering
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*/
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MessageCatcherWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if($tw.utils.count(changedAttributes) > 0) {
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this.refreshSelf();
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return true;
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}
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return this.refreshChildren(changedTiddlers);
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};
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exports.messagecatcher = MessageCatcherWidget;
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})();
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