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40 lines
1.1 KiB
40 lines
1.1 KiB
4 weeks ago
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var OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
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var KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/;
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var unsafeToRemovePlusSignAfter = {
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Dimension: true,
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Hash: true,
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Identifier: true,
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Number: true,
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Raw: true,
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UnicodeRange: true
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};
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function packNumber(value, item) {
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// omit plus sign only if no prev or prev is safe type
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var regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.hasOwnProperty(item.prev.data.type)
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? KEEP_PLUSSIGN
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: OMIT_PLUSSIGN;
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// 100 -> '100'
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// 00100 -> '100'
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// +100 -> '100' (only when safe, e.g. omitting plus sign for 1px+1px leads to single dimension instead of two)
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// -100 -> '-100'
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// 0.123 -> '.123'
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// 0.12300 -> '.123'
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// 0.0 -> ''
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// 0 -> ''
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// -0 -> '-'
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value = String(value).replace(regexp, '$1$2$3');
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if (value === '' || value === '-') {
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value = '0';
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}
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return value;
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}
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module.exports = function(node, item) {
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node.value = packNumber(node.value, item);
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};
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module.exports.pack = packNumber;
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