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const OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
const KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
const unsafeToRemovePlusSignAfter = new Set([
'Dimension',
'Hash',
'Identifier',
'Number',
'Raw',
'UnicodeRange'
]);
export function packNumber(value, item) {
// omit plus sign only if no prev or prev is safe type
const regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.has(item.prev.data.type)
? KEEP_PLUSSIGN
: OMIT_PLUSSIGN;
// 100 -> '100'
// 00100 -> '100'
// +100 -> '100'
// -100 -> '-100'
// 0.123 -> '.123'
// 0.12300 -> '.123'
// 0.0 -> ''
// 0 -> ''
// -0 -> '-'
value = String(value).replace(regexp, '$1$2$3');
if (value === '' || value === '-') {
value = '0';
}
// FIXME: is it solution simplier?
// value = String(Number(value)).replace(/^(-?)0+\./, '$1.');
return value;
}
export function Number(node) {
node.value = packNumber(node.value);
};
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