1 files changed, 153 insertions, 0 deletions
diff --git a/node_modules/postcss-normalize-url/src/normalize.js b/node_modules/postcss-normalize-url/src/normalize.js
new file mode 100644
index 00000000..e6597e0d
--- /dev/null
+++ b/node_modules/postcss-normalize-url/src/normalize.js
@@ -0,0 +1,153 @@
+'use strict';
+/* Derived from normalize-url https://github.com/sindresorhus/normalize-url/main/index.js by Sindre Sorhus */
+
+// https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
+const DATA_URL_DEFAULT_MIME_TYPE = 'text/plain';
+const DATA_URL_DEFAULT_CHARSET = 'us-ascii';
+
+const supportedProtocols = new Set(['https:', 'http:', 'file:']);
+
+/**
+ * @param {string} urlString
+ * @return {boolean} */
+function hasCustomProtocol(urlString) {
+  try {
+    const { protocol } = new URL(urlString);
+    return protocol.endsWith(':') && !supportedProtocols.has(protocol);
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * @param {string} urlString
+ * @return {string} */
+function normalizeDataURL(urlString) {
+  const match = /^data:(?<type>[^,]*?),(?<data>[^#]*?)(?:#(?<hash>.*))?$/.exec(
+    urlString
+  );
+
+  if (!match) {
+    throw new Error(`Invalid URL: ${urlString}`);
+  }
+
+  let { type, data, hash } =
+    /** @type {{type: string, data: string, hash: string}} */ (match.groups);
+  const mediaType = type.split(';');
+
+  let isBase64 = false;
+  if (mediaType[mediaType.length - 1] === 'base64') {
+    mediaType.pop();
+    isBase64 = true;
+  }
+
+  // Lowercase MIME type
+  const mimeType = mediaType.shift()?.toLowerCase() ?? '';
+  const attributes = mediaType
+    .map(
+      /** @type {(string: string) => string} */ (attribute) => {
+        let [key, value = ''] = attribute
+          .split('=')
+          .map(
+            /** @type {(string: string) => string} */ (string) => string.trim()
+          );
+
+        // Lowercase `charset`
+        if (key === 'charset') {
+          value = value.toLowerCase();
+
+          if (value === DATA_URL_DEFAULT_CHARSET) {
+            return '';
+          }
+        }
+
+        return `${key}${value ? `=${value}` : ''}`;
+      }
+    )
+    .filter(Boolean);
+
+  const normalizedMediaType = [...attributes];
+
+  if (isBase64) {
+    normalizedMediaType.push('base64');
+  }
+
+  if (
+    normalizedMediaType.length > 0 ||
+    (mimeType && mimeType !== DATA_URL_DEFAULT_MIME_TYPE)
+  ) {
+    normalizedMediaType.unshift(mimeType);
+  }
+
+  return `data:${normalizedMediaType.join(';')},${
+    isBase64 ? data.trim() : data
+  }${hash ? `#${hash}` : ''}`;
+}
+
+/**
+ * @param {string} urlString
+ * @return {string}
+ */
+function normalizeUrl(urlString) {
+  urlString = urlString.trim();
+
+  // Data URL
+  if (/^data:/i.test(urlString)) {
+    return normalizeDataURL(urlString);
+  }
+
+  if (hasCustomProtocol(urlString)) {
+    return urlString;
+  }
+
+  const hasRelativeProtocol = urlString.startsWith('//');
+  const isRelativeUrl = !hasRelativeProtocol && /^\.*\//.test(urlString);
+
+  // Prepend protocol
+  if (!isRelativeUrl) {
+    urlString = urlString.replace(/^(?!(?:\w+:)?\/\/)|^\/\//, 'http:');
+  }
+
+  const urlObject = new URL(urlString);
+
+  // Remove duplicate slashes if not preceded by a protocol
+  if (urlObject.pathname) {
+    urlObject.pathname = urlObject.pathname.replace(
+      /(?<!\b[a-z][a-z\d+\-.]{1,50}:)\/{2,}/g,
+      '/'
+    );
+  }
+
+  // Decode URI octets
+  if (urlObject.pathname) {
+    try {
+      urlObject.pathname = decodeURI(urlObject.pathname);
+    } catch {
+      /* Do nothing */
+    }
+  }
+
+  if (urlObject.hostname) {
+    // Remove trailing dot
+    urlObject.hostname = urlObject.hostname.replace(/\.$/, '');
+  }
+
+  urlObject.pathname = urlObject.pathname.replace(/\/$/, '');
+
+  // Take advantage of many of the Node `url` normalizations
+  urlString = urlObject.toString();
+
+  // Remove ending `/`
+  if (urlObject.pathname === '/' && urlObject.hash === '') {
+    urlString = urlString.replace(/\/$/, '');
+  }
+
+  // Restore relative protocol
+  if (hasRelativeProtocol) {
+    urlString = urlString.replace(/^http:\/\//, '//');
+  }
+
+  return urlString;
+}
+
+module.exports = normalizeUrl;