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45 lines
1.1 KiB
45 lines
1.1 KiB
'use strict'; |
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const OMIT_PLUSSIGN = /^(?:\+|(-))?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/; |
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const KEEP_PLUSSIGN = /^([\+\-])?0*(\d*)(?:\.0*|(\.\d*?)0*)?$/; |
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const unsafeToRemovePlusSignAfter = new Set([ |
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'Dimension', |
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'Hash', |
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'Identifier', |
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'Number', |
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'Raw', |
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'UnicodeRange' |
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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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const regexp = item && item.prev !== null && unsafeToRemovePlusSignAfter.has(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' |
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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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// FIXME: is it solution simplier? |
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// value = String(Number(value)).replace(/^(-?)0+\./, '$1.'); |
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return value; |
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} |
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function Number(node) { |
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node.value = packNumber(node.value); |
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} |
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exports.Number = Number; |
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exports.packNumber = packNumber;
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