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59 lines
1.6 KiB
59 lines
1.6 KiB
define(function(require, exports, module) {
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var keymap = require('./keymap');
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var CTRL_MASK = 0x1000;
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var ALT_MASK = 0x2000;
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var SHIFT_MASK = 0x4000;
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function hash(unknown) {
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if (typeof(unknown) == 'string') {
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return hashKeyExpression(unknown);
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}
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return hashKeyEvent(unknown);
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}
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function is(a, b) {
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return a && b && hash(a) == hash(b);
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}
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exports.hash = hash;
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exports.is = is;
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function hashKeyEvent(keyEvent) {
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var hashCode = 0;
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if (keyEvent.ctrlKey || keyEvent.metaKey) {
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hashCode |= CTRL_MASK;
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}
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if (keyEvent.altKey) {
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hashCode |= ALT_MASK;
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}
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if (keyEvent.shiftKey) {
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hashCode |= SHIFT_MASK;
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}
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// Shift, Control, Alt KeyCode ignored.
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if ([16, 17, 18, 91].indexOf(keyEvent.keyCode) == -1) {
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hashCode |= keyEvent.keyCode;
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}
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return hashCode;
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}
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function hashKeyExpression(keyExpression) {
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var hashCode = 0;
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keyExpression.toLowerCase().split(/\s*\+\s*/).forEach(function(name) {
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switch(name) {
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case 'ctrl':
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case 'cmd':
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hashCode |= CTRL_MASK;
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break;
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case 'alt':
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hashCode |= ALT_MASK;
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break;
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case 'shift':
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hashCode |= SHIFT_MASK;
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break;
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default:
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hashCode |= keymap[name];
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}
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});
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return hashCode;
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}
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});
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