92 lines
2.4 KiB
JavaScript
92 lines
2.4 KiB
JavaScript
/*\
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title: $:/core/modules/widgets/keyboard.js
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type: application/javascript
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module-type: widget
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Keyboard shortcut 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 KeyboardWidget = 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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KeyboardWidget.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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KeyboardWidget.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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// Create element
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var domNode = this.document.createElement("div");
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// Assign classes
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var classes = (this["class"] || "").split(" ");
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classes.push("tc-keyboard");
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domNode.className = classes.join(" ");
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// Add a keyboard event handler
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domNode.addEventListener("keydown",function (event) {
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if($tw.keyboardManager.checkKeyDescriptors(event,self.keyInfoArray)) {
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self.invokeActions(this,event);
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self.dispatchMessage(event);
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event.preventDefault();
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event.stopPropagation();
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return true;
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}
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return false;
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},false);
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// Insert element
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parent.insertBefore(domNode,nextSibling);
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this.renderChildren(domNode,null);
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this.domNodes.push(domNode);
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};
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KeyboardWidget.prototype.dispatchMessage = function(event) {
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this.dispatchEvent({type: this.message, param: this.param, tiddlerTitle: this.getVariable("currentTiddler")});
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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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KeyboardWidget.prototype.execute = function() {
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// Get attributes
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this.message = this.getAttribute("message");
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this.param = this.getAttribute("param");
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this.key = this.getAttribute("key");
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this.keyInfoArray = $tw.keyboardManager.parseKeyDescriptors(this.key);
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this["class"] = this.getAttribute("class");
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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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KeyboardWidget.prototype.refresh = function(changedTiddlers) {
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var changedAttributes = this.computeAttributes();
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if(changedAttributes.message || changedAttributes.param || changedAttributes.key || changedAttributes["class"]) {
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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.keyboard = KeyboardWidget;
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})();
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