89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
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'use strict';
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exports.type = 'perItem';
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exports.active = true;
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exports.description = 'rounds numeric values to the fixed precision, removes default ‘px’ units';
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exports.params = {
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floatPrecision: 3,
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leadingZero: true,
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defaultPx: true,
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convertToPx: true
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};
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var regNumericValues = /^([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)(px|pt|pc|mm|cm|m|in|ft|em|ex|%)?$/,
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removeLeadingZero = require('../lib/svgo/tools').removeLeadingZero,
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absoluteLengths = { // relative to px
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cm: 96/2.54,
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mm: 96/25.4,
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in: 96,
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pt: 4/3,
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pc: 16
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};
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/**
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* Round numeric values to the fixed precision,
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* remove default 'px' units.
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*
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* @param {Object} item current iteration item
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* @param {Object} params plugin params
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* @return {Boolean} if false, item will be filtered out
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*
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* @author Kir Belevich
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*/
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exports.fn = function(item, params) {
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if (item.isElem()) {
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var floatPrecision = params.floatPrecision;
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if (item.hasAttr('viewBox')) {
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var nums = item.attr('viewBox').value.split(/\s,?\s*|,\s*/g);
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item.attr('viewBox').value = nums.map(function(value) {
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var num = +value;
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return isNaN(num) ? value : +num.toFixed(floatPrecision);
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}).join(' ');
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}
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item.eachAttr(function(attr) {
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// The `version` attribute is a text string and cannot be rounded
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if (attr.name === 'version') { return }
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var match = attr.value.match(regNumericValues);
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// if attribute value matches regNumericValues
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if (match) {
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// round it to the fixed precision
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var num = +(+match[1]).toFixed(floatPrecision),
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units = match[3] || '';
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// convert absolute values to pixels
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if (params.convertToPx && units && (units in absoluteLengths)) {
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var pxNum = +(absoluteLengths[units] * match[1]).toFixed(floatPrecision);
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if (String(pxNum).length < match[0].length) {
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num = pxNum;
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units = 'px';
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}
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}
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// and remove leading zero
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if (params.leadingZero) {
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num = removeLeadingZero(num);
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}
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// remove default 'px' units
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if (params.defaultPx && units === 'px') {
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units = '';
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}
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attr.value = num + units;
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}
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});
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}
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};
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