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Vim-Vixen/src/shared/commands/properties.js
2018-01-08 18:37:29 +09:00

31 lines
750 B
JavaScript

const mustNumber = (v) => {
let num = Number(v);
if (isNaN(num)) {
throw new Error('Not number: ' + v);
}
return num;
};
const parseProperty = (word, types) => {
let [key, value] = word.split('=');
if (!value) {
value = !key.startsWith('no');
key = value ? key : key.slice(2);
}
let type = types[key];
if (!type) {
throw new Error('Unknown property: ' + key);
}
if (type === 'boolean' && typeof value !== 'boolean' ||
type !== 'boolean' && typeof value === 'boolean') {
throw new Error('Invalid argument: ' + word);
}
switch (type) {
case 'string': return [key, value];
case 'number': return [key, mustNumber(value)];
case 'boolean': return [key, value];
}
};
export { parseProperty };