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42 lines
1.1 KiB
42 lines
1.1 KiB
2 years ago
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var Emitter = require('./Emitter');
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var keyCode = require('./keyCode');
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var each = require('./each');
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var unique = require('./unique');
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var trim = require('./trim');
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var map = require('./map');
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exports = {
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on: function(keys, listener) {
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keys = keys.split(regComma);
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each(keys, function(key) {
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emitter.on(normalizeKey(key), listener);
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});
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},
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off: function(keys, listener) {
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keys = keys.split(regComma);
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each(keys, function(key) {
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emitter.off(normalizeKey(key), listener);
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});
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}
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};
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var emitter = new Emitter();
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document.addEventListener('keydown', function(e) {
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var keys = [];
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if (e.ctrlKey) keys.push('ctrl');
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if (e.shiftKey) keys.push('shift');
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keys.push(keyCode(e.keyCode));
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emitter.emit(normalizeKey(keys.join('+')), e);
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});
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function normalizeKey(keyStr) {
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var keys = keyStr.split(regPlus);
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keys = map(keys, function(key) {
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return trim(key);
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});
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keys = unique(keys);
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keys.sort();
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return keys.join('+');
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}
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var regComma = /,/g;
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var regPlus = /\+/g;
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module.exports = exports;
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