1 files changed, 151 insertions, 0 deletions
diff --git a/node_modules/postcss-normalize-url/src/index.js b/node_modules/postcss-normalize-url/src/index.js
new file mode 100644
index 00000000..3542dcf8
--- /dev/null
+++ b/node_modules/postcss-normalize-url/src/index.js
@@ -0,0 +1,151 @@
+'use strict';
+const path = require('path');
+const valueParser = require('postcss-value-parser');
+const normalize = require('./normalize.js');
+
+const multiline = /\\[\r\n]/;
+// eslint-disable-next-line no-useless-escape
+const escapeChars = /([\s\(\)"'])/g;
+
+// Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
+// Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
+const ABSOLUTE_URL_REGEX = /^[a-zA-Z][a-zA-Z\d+\-.]*?:/;
+// Windows paths like `c:\`
+const WINDOWS_PATH_REGEX = /^[a-zA-Z]:\\/;
+
+/**
+ * Originally in sindresorhus/is-absolute-url
+ *
+ * @param {string} url
+ */
+function isAbsolute(url) {
+  if (WINDOWS_PATH_REGEX.test(url)) {
+    return false;
+  }
+  return ABSOLUTE_URL_REGEX.test(url);
+}
+
+/**
+ * @param {string} url
+ * @return {string}
+ */
+function convert(url) {
+  if (isAbsolute(url) || url.startsWith('//')) {
+    let normalizedURL;
+
+    try {
+      normalizedURL = normalize(url);
+    } catch (e) {
+      normalizedURL = url;
+    }
+
+    return normalizedURL;
+  }
+
+  // `path.normalize` always returns backslashes on Windows, need replace in `/`
+  return path.normalize(url).replace(new RegExp('\\' + path.sep, 'g'), '/');
+}
+
+/**
+ * @param {import('postcss').AtRule} rule
+ * @return {void}
+ */
+function transformNamespace(rule) {
+  rule.params = valueParser(rule.params)
+    .walk((node) => {
+      if (
+        node.type === 'function' &&
+        node.value.toLowerCase() === 'url' &&
+        node.nodes.length
+      ) {
+        /** @type {valueParser.Node} */ (node).type = 'string';
+        /** @type {any} */ (node).quote =
+          node.nodes[0].type === 'string' ? node.nodes[0].quote : '"';
+        node.value = node.nodes[0].value;
+      }
+      if (node.type === 'string') {
+        node.value = node.value.trim();
+      }
+      return false;
+    })
+    .toString();
+}
+
+/**
+ * @param {import('postcss').Declaration} decl
+ * @return {void}
+ */
+function transformDecl(decl) {
+  decl.value = valueParser(decl.value)
+    .walk((node) => {
+      if (node.type !== 'function' || node.value.toLowerCase() !== 'url') {
+        return false;
+      }
+
+      node.before = node.after = '';
+
+      if (!node.nodes.length) {
+        return false;
+      }
+      let url = node.nodes[0];
+      let escaped;
+
+      url.value = url.value.trim().replace(multiline, '');
+
+      // Skip empty URLs
+      // Empty URL function equals request to current stylesheet where it is declared
+      if (url.value.length === 0) {
+        /** @type {any} */ (url).quote = '';
+
+        return false;
+      }
+
+      if (/^data:(.*)?,/i.test(url.value)) {
+        return false;
+      }
+
+      if (!/^.+-extension:\//i.test(url.value)) {
+        url.value = convert(url.value);
+      }
+
+      if (escapeChars.test(url.value) && url.type === 'string') {
+        escaped = url.value.replace(escapeChars, '\\$1');
+
+        if (escaped.length < url.value.length + 2) {
+          url.value = escaped;
+          /** @type {valueParser.Node} */ (url).type = 'word';
+        }
+      } else {
+        url.type = 'word';
+      }
+
+      return false;
+    })
+    .toString();
+}
+
+/**
+ * @type {import('postcss').PluginCreator<void>}
+ * @return {import('postcss').Plugin}
+ */
+function pluginCreator() {
+  return {
+    postcssPlugin: 'postcss-normalize-url',
+
+    OnceExit(css) {
+      css.walk((node) => {
+        if (node.type === 'decl') {
+          return transformDecl(node);
+        } else if (
+          node.type === 'atrule' &&
+          node.name.toLowerCase() === 'namespace'
+        ) {
+          return transformNamespace(node);
+        }
+      });
+    },
+  };
+}
+
+pluginCreator.postcss = true;
+module.exports = pluginCreator;