--- /dev/null
+'use strict';
+
+var parser = require('postcss-value-parser');
+
+function convert(value) {
+ if (value && value.length === 2 && value[0] === 'span' && parseInt(value[1], 10) > 0) {
+ return [false, parseInt(value[1], 10)];
+ }
+
+ if (value && value.length === 1 && parseInt(value[0], 10) > 0) {
+ return [parseInt(value[0], 10), false];
+ }
+
+ return [false, false];
+}
+
+function translate(values, startIndex, endIndex) {
+ var startValue = values[startIndex];
+ var endValue = values[endIndex];
+
+ if (!startValue) {
+ return [false, false];
+ }
+
+ var _convert = convert(startValue),
+ start = _convert[0],
+ spanStart = _convert[1];
+
+ var _convert2 = convert(endValue),
+ end = _convert2[0],
+ spanEnd = _convert2[1];
+
+ if (start && !endValue) {
+ return [start, false];
+ }
+
+ if (spanStart && end) {
+ return [end - spanStart, spanStart];
+ }
+
+ if (start && spanEnd) {
+ return [start, spanEnd];
+ }
+
+ if (start && end) {
+ return [start, end - start];
+ }
+
+ return [false, false];
+}
+
+function parse(decl) {
+ var node = parser(decl.value);
+
+ var values = [];
+ var current = 0;
+ values[current] = [];
+
+ for (var _iterator = node.nodes, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
+ var _ref;
+
+ if (_isArray) {
+ if (_i >= _iterator.length) break;
+ _ref = _iterator[_i++];
+ } else {
+ _i = _iterator.next();
+ if (_i.done) break;
+ _ref = _i.value;
+ }
+
+ var i = _ref;
+
+ if (i.type === 'div') {
+ current += 1;
+ values[current] = [];
+ } else if (i.type === 'word') {
+ values[current].push(i.value);
+ }
+ }
+
+ return values;
+}
+
+function parseTemplateShortcut(decl) {
+ var node = parser(decl.value, { loose: true });
+
+ var values = [];
+ var current = 0;
+ values[current] = [];
+
+ for (var _iterator2 = node.nodes, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
+ var _ref2;
+
+ if (_isArray2) {
+ if (_i2 >= _iterator2.length) break;
+ _ref2 = _iterator2[_i2++];
+ } else {
+ _i2 = _iterator2.next();
+ if (_i2.done) break;
+ _ref2 = _i2.value;
+ }
+
+ var i = _ref2;
+
+ if (i.type === 'div') {
+ current += 1;
+ values[current] = [];
+ } else {
+ values[current].push(parser.stringify(i));
+ }
+ }
+
+ return values;
+}
+
+function walkRepeat(node) {
+ var fixed = [];
+ for (var _iterator3 = node.nodes, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : _iterator3[Symbol.iterator]();;) {
+ var _ref3;
+
+ if (_isArray3) {
+ if (_i3 >= _iterator3.length) break;
+ _ref3 = _iterator3[_i3++];
+ } else {
+ _i3 = _iterator3.next();
+ if (_i3.done) break;
+ _ref3 = _i3.value;
+ }
+
+ var i = _ref3;
+
+ if (i.nodes) {
+ walkRepeat(i);
+ }
+ fixed.push(i);
+ if (i.type === 'function' && i.value === 'repeat') {
+ var first = i.nodes.shift();
+ if (first) {
+ var count = first.value;
+ i.nodes.shift();
+ i.value = '';
+ fixed.push({ type: 'word', value: '[' + count + ']' });
+ }
+ }
+ }
+ node.nodes = fixed;
+}
+
+function changeRepeat(value) {
+ var ast = parser(value);
+ walkRepeat(ast);
+ return ast.toString();
+}
+
+module.exports = {
+ parse: parse,
+ translate: translate,
+ changeRepeat: changeRepeat,
+ parseTemplateShortcut: parseTemplateShortcut
+};
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