var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/; var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/; var unsafeToRemovePlusSignAfter = { Dimension: true, Hash: true, Identifier: true, Number: true, Raw: true, UnicodeRange: true }; function packNumber(value, item) { // omit plus sign only if no prev or prev is safe type var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type) ? KEEP_PLUSSIGN : OMIT_PLUSSIGN; // 100 -> '100' // 00100 -> '100' // +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two) // -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'; } return value; } module.exports = function(node, item) { node.value = packNumber(node.value, item); }; module.exports.pack = packNumber;