1 files changed, 83 insertions, 0 deletions
diff --git a/node_modules/postcss-merge-longhand/src/lib/parseWsc.js b/node_modules/postcss-merge-longhand/src/lib/parseWsc.js
new file mode 100644
index 00000000..a0bc16c1
--- /dev/null
+++ b/node_modules/postcss-merge-longhand/src/lib/parseWsc.js
@@ -0,0 +1,83 @@
+'use strict';
+const { list } = require('postcss');
+const { isWidth, isStyle, isColor } = require('./validateWsc.js');
+
+const none = /^\s*(none|medium)(\s+none(\s+(none|currentcolor))?)?\s*$/i;
+
+/* Approximate https://drafts.csswg.org/css-values-4/#typedef-dashed-ident */
+// eslint-disable-next-line no-control-regex
+const varRE = /--(\w|-|[^\x00-\x7F])+/g;
+/** @type {(v: string) => string} */
+const toLower = (v) => {
+  let match;
+  let lastIndex = 0;
+  let result = '';
+  varRE.lastIndex = 0;
+  while ((match = varRE.exec(v)) !== null) {
+    if (match.index > lastIndex) {
+      result += v.substring(lastIndex, match.index).toLowerCase();
+    }
+    result += match[0];
+    lastIndex = match.index + match[0].length;
+  }
+  if (lastIndex < v.length) {
+    result += v.substring(lastIndex).toLowerCase();
+  }
+  if (result === '') {
+    return v;
+  }
+  return result;
+};
+
+/**
+ * @param {string} value
+ * @return {[string, string, string]}
+ */
+module.exports = function parseWsc(value) {
+  if (none.test(value)) {
+    return ['medium', 'none', 'currentcolor'];
+  }
+
+  let width, style, color;
+
+  const values = list.space(value);
+  if (
+    values.length > 1 &&
+    isStyle(values[1]) &&
+    values[0].toLowerCase() === 'none'
+  ) {
+    values.unshift();
+    width = '0';
+  }
+
+  /** @type {string[]} */
+  const unknown = [];
+
+  values.forEach((v) => {
+    if (isStyle(v)) {
+      style = toLower(v);
+    } else if (isWidth(v)) {
+      width = toLower(v);
+    } else if (isColor(v)) {
+      color = toLower(v);
+    } else {
+      unknown.push(v);
+    }
+  });
+
+  if (unknown.length) {
+    if (!width && style && color) {
+      width = unknown.pop();
+    }
+
+    if (width && !style && color) {
+      style = unknown.pop();
+    }
+
+    if (width && style && !color) {
+      color = unknown.pop();
+    }
+  }
+
+  return /** @type {[string, string, string]} */ ([width, style, color]);
+};