Initial commit

node_modules/@astrojs/markdown-remark/dist/highlight.js

@@ -0,0 +1,61 @@
+import { fromHtml } from "hast-util-from-html";
+import { toText } from "hast-util-to-text";
+import { removePosition } from "unist-util-remove-position";
+import { visitParents } from "unist-util-visit-parents";
+const languagePattern = /\blanguage-(\S+)\b/;
+const defaultExcludeLanguages = ["math"];
+async function highlightCodeBlocks(tree, highlighter, excludeLanguages = []) {
+  const nodes = [];
+  visitParents(tree, { type: "element", tagName: "code" }, (node, ancestors) => {
+    const parent = ancestors.at(-1);
+    if (parent?.type !== "element" || parent.tagName !== "pre") {
+      return;
+    }
+    if (parent.children.length !== 1) {
+      return;
+    }
+    let languageMatch;
+    let { className } = node.properties;
+    if (typeof className === "string") {
+      languageMatch = languagePattern.exec(className);
+    } else if (Array.isArray(className)) {
+      for (const cls of className) {
+        if (typeof cls !== "string") {
+          continue;
+        }
+        languageMatch = languagePattern.exec(cls);
+        if (languageMatch) {
+          break;
+        }
+      }
+    }
+    const language = languageMatch?.[1] || "plaintext";
+    if (excludeLanguages.includes(language) || defaultExcludeLanguages.includes(language)) {
+      return;
+    }
+    nodes.push({
+      node,
+      language,
+      parent,
+      grandParent: ancestors.at(-2)
+    });
+  });
+  for (const { node, language, grandParent, parent } of nodes) {
+    const meta = node.data?.meta ?? node.properties.metastring ?? void 0;
+    const code = toText(node, { whitespace: "pre" });
+    const result = await highlighter(code, language, { meta });
+    let replacement;
+    if (typeof result === "string") {
+      replacement = fromHtml(result, { fragment: true }).children[0];
+      removePosition(replacement);
+    } else {
+      replacement = result.children[0];
+    }
+    const index = grandParent.children.indexOf(parent);
+    grandParent.children[index] = replacement;
+  }
+}
+export {
+  defaultExcludeLanguages,
+  highlightCodeBlocks
+};