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https://github.com/Jermolene/TiddlyWiki5
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72 lines
1.4 KiB
JavaScript
72 lines
1.4 KiB
JavaScript
/*\
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title: $:/core/modules/utils/dom/keyboard.js
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type: application/javascript
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module-type: utils
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Keyboard utilities
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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 namedKeys = {
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"backspace": 8,
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"tab": 9,
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"enter": 13,
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"escape": 27
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};
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/*
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Parses a key descriptor into the structure:
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{
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keyCode: numeric keycode
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shiftKey: boolean
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altKey: boolean
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ctrlKey: boolean
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}
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Key descriptors have the following format:
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ctrl+enter
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ctrl+shift+alt+A
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*/
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exports.parseKeyDescriptor = function(keyDescriptor) {
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var components = keyDescriptor.split("+"),
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info = {
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keyCode: 0,
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shiftKey: false,
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altKey: false,
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ctrlKey: false
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};
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for(var t=0; t<components.length; t++) {
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var s = components[t].toLowerCase();
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// Look for modifier keys
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if(s === "ctrl") {
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info.ctrlKey = true;
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} else if(s === "shift") {
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info.shiftKey = true;
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} else if(s === "alt") {
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info.altKey = true;
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} else if(s === "meta") {
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info.metaKey = true;
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}
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// Replace named keys with their code
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if(namedKeys[s]) {
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info.keyCode = namedKeys[s];
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}
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}
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return info;
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};
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exports.checkKeyDescriptor = function(event,keyInfo) {
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var metaKeyStatus = !!keyInfo.metaKey; // Using a temporary variable to keep JSHint happy
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return event.keyCode === keyInfo.keyCode &&
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event.shiftKey === keyInfo.shiftKey &&
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event.altKey === keyInfo.altKey &&
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event.ctrlKey === keyInfo.ctrlKey &&
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event.metaKey === metaKeyStatus;
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};
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})();
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