72 lines
2.7 KiB
JavaScript
72 lines
2.7 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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var _postcssSelectorParser = _interopRequireDefault(require("postcss-selector-parser"));
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var _postcssValueParser = _interopRequireDefault(require("postcss-value-parser"));
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var _parser = require("../parser");
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var _reducer = _interopRequireDefault(require("./reducer"));
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var _stringifier = _interopRequireDefault(require("./stringifier"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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// eslint-disable-next-line import/no-unresolved
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var MATCH_CALC = /((?:-(moz|webkit)-)?calc)/i;
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function transformValue(value, options, result, item) {
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return (0, _postcssValueParser.default)(value).walk(function (node) {
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// skip anything which isn't a calc() function
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if (node.type !== 'function' || !MATCH_CALC.test(node.value)) return node; // stringify calc expression and produce an AST
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var contents = _postcssValueParser.default.stringify(node.nodes);
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var ast = _parser.parser.parse(contents); // reduce AST to its simplest form, that is, either to a single value
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// or a simplified calc expression
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var reducedAst = (0, _reducer.default)(ast, options.precision, item); // stringify AST and write it back
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node.type = 'word';
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node.value = (0, _stringifier.default)(node.value, reducedAst, value, options, result, item);
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}, true).toString();
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}
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function transformSelector(value, options, result, item) {
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return (0, _postcssSelectorParser.default)(function (selectors) {
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selectors.walk(function (node) {
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// attribute value
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// e.g. the "calc(3*3)" part of "div[data-size="calc(3*3)"]"
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if (node.type === 'attribute' && node.value) {
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node.setValue(transformValue(node.value, options, result, item));
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} // tag value
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// e.g. the "calc(3*3)" part of "div:nth-child(2n + calc(3*3))"
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if (node.type === 'tag') node.value = transformValue(node.value, options, result, item);
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return;
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});
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}).processSync(value);
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}
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var _default = function _default(node, property, options, result) {
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var value = property === "selector" ? transformSelector(node[property], options, result, node) : transformValue(node[property], options, result, node); // if the preserve option is enabled and the value has changed, write the
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// transformed value into a cloned node which is inserted before the current
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// node, preserving the original value. Otherwise, overwrite the original
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// value.
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if (options.preserve && node[property] !== value) {
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var clone = node.clone();
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clone[property] = value;
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node.parent.insertBefore(node, clone);
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} else node[property] = value;
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};
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exports.default = _default;
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module.exports = exports.default;
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