aaac7fed
 liuqimichale
add
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'use strict';
exports.type = 'perItem';
exports.active = true;
exports.description = 'rounds numeric values to the fixed precision, removes default ‘px’ units';
exports.params = {
floatPrecision: 3,
leadingZero: true,
defaultPx: true,
convertToPx: true
};
var regNumericValues = /^([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)(px|pt|pc|mm|cm|m|in|ft|em|ex|%)?$/,
removeLeadingZero = require('../lib/svgo/tools').removeLeadingZero,
absoluteLengths = { // relative to px
cm: 96/2.54,
mm: 96/25.4,
in: 96,
pt: 4/3,
pc: 16
};
/**
* Round numeric values to the fixed precision,
* remove default 'px' units.
*
* @param {Object} item current iteration item
* @param {Object} params plugin params
* @return {Boolean} if false, item will be filtered out
*
* @author Kir Belevich
*/
exports.fn = function(item, params) {
if (item.isElem()) {
var match;
item.eachAttr(function(attr) {
match = attr.value.match(regNumericValues);
// if attribute value matches regNumericValues
if (match) {
// round it to the fixed precision
var num = +(+match[1]).toFixed(params.floatPrecision),
units = match[3] || '';
// convert absolute values to pixels
if (params.convertToPx && units && (units in absoluteLengths)) {
var pxNum = +(absoluteLengths[units] * match[1]).toFixed(params.floatPrecision);
if (String(pxNum).length < match[0].length)
num = pxNum,
units = 'px';
}
// and remove leading zero
if (params.leadingZero) {
num = removeLeadingZero(num);
}
// remove default 'px' units
if (params.defaultPx && units === 'px') {
units = '';
}
attr.value = num + units;
}
});
}
};
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