index.js
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'use strict';
exports.__esModule = true;
var _postcss = require('postcss');
var _postcss2 = _interopRequireDefault(_postcss);
var _postcssValueParser = require('postcss-value-parser');
var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
var _convert = require('./lib/convert');
var _convert2 = _interopRequireDefault(_convert);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var LENGTH_UNITS = ['em', 'ex', 'ch', 'rem', 'vw', 'vh', 'vmin', 'vmax', 'cm', 'mm', 'q', 'in', 'pt', 'pc', 'px'];
function parseWord(node, opts, keepZeroUnit) {
var pair = (0, _postcssValueParser.unit)(node.value);
if (pair) {
var num = Number(pair.number);
var u = pair.unit.toLowerCase();
if (num === 0) {
node.value = keepZeroUnit || !~LENGTH_UNITS.indexOf(u) && u !== '%' ? 0 + u : 0;
} else {
node.value = (0, _convert2.default)(num, u, opts);
if (typeof opts.precision === 'number' && u === 'px' && ~pair.number.indexOf('.')) {
var precision = Math.pow(10, opts.precision);
node.value = Math.round(parseFloat(node.value) * precision) / precision + u;
}
}
}
}
function clampOpacity(node) {
var pair = (0, _postcssValueParser.unit)(node.value);
if (!pair) {
return;
}
var num = Number(pair.number);
if (num > 1) {
node.value = 1 + pair.unit;
} else if (num < 0) {
node.value = 0 + pair.unit;
}
}
function shouldStripPercent(_ref) {
var value = _ref.value,
prop = _ref.prop,
parent = _ref.parent;
return ~value.indexOf('%') && (prop === 'max-height' || prop === 'height') || parent.parent && parent.parent.name === 'keyframes' && prop === 'stroke-dasharray' || prop === 'stroke-dashoffset' || prop === 'stroke-width';
}
function transform(opts) {
return function (decl) {
var prop = decl.prop;
if (~prop.indexOf('flex') || prop.indexOf('--') === 0) {
return;
}
decl.value = (0, _postcssValueParser2.default)(decl.value).walk(function (node) {
if (node.type === 'word') {
parseWord(node, opts, shouldStripPercent(decl));
if (prop === 'opacity' || prop === 'shape-image-threshold') {
clampOpacity(node);
}
} else if (node.type === 'function') {
if (node.value === 'calc' || node.value === 'hsl' || node.value === 'hsla') {
(0, _postcssValueParser.walk)(node.nodes, function (n) {
if (n.type === 'word') {
parseWord(n, opts, true);
}
});
return false;
}
if (node.value === 'url') {
return false;
}
}
}).toString();
};
}
var plugin = 'postcss-convert-values';
exports.default = _postcss2.default.plugin(plugin, function () {
var opts = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : { precision: false };
if (opts.length === undefined && opts.convertLength !== undefined) {
console.warn(plugin + ': `convertLength` option is deprecated. Use `length`');
opts.length = opts.convertLength;
}
if (opts.length === undefined && opts.convertTime !== undefined) {
console.warn(plugin + ': `convertTime` option is deprecated. Use `time`');
opts.time = opts.convertTime;
}
return function (css) {
return css.walkDecls(transform(opts));
};
});
module.exports = exports['default'];