initial commit

node_modules/postcss-merge-longhand/src/lib/validateWsc.js

@@ -0,0 +1,87 @@
+'use strict';
+const colors = require('./colornames.js');
+
+const widths = new Set(['thin', 'medium', 'thick']);
+const styles = new Set([
+  'none',
+  'hidden',
+  'dotted',
+  'dashed',
+  'solid',
+  'double',
+  'groove',
+  'ridge',
+  'inset',
+  'outset',
+]);
+
+/**
+ * @param {string} value
+ * @return {boolean}
+ */
+function isStyle(value) {
+  return value !== undefined && styles.has(value.toLowerCase());
+}
+
+/**
+ * @param {string} value
+ * @return {boolean}
+ */
+function isWidth(value) {
+  return (
+    (value && widths.has(value.toLowerCase())) ||
+    /^(\d+(\.\d+)?|\.\d+)(\w+)?$/.test(value)
+  );
+}
+
+/**
+ * @param {string} value
+ * @return {boolean}
+ */
+function isColor(value) {
+  if (!value) {
+    return false;
+  }
+
+  value = value.toLowerCase();
+
+  if (/rgba?\(/.test(value)) {
+    return true;
+  }
+
+  if (/hsla?\(/.test(value)) {
+    return true;
+  }
+
+  if (/#([0-9a-z]{6}|[0-9a-z]{3})/.test(value)) {
+    return true;
+  }
+
+  if (value === 'transparent') {
+    return true;
+  }
+
+  if (value === 'currentcolor') {
+    return true;
+  }
+
+  return colors.has(value);
+}
+
+/**
+ * @param {[string, string, string]} wscs
+ * @return {boolean}
+ */
+function isValidWsc(wscs) {
+  const validWidth = isWidth(wscs[0]);
+  const validStyle = isStyle(wscs[1]);
+  const validColor = isColor(wscs[2]);
+
+  return (
+    (validWidth && validStyle) ||
+    (validWidth && validColor) ||
+    (validStyle && validColor)
+  );
+}
+
+module.exports = { isStyle, isWidth, isColor, isValidWsc };