grid-shorthand.js
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'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
};