feat: init

node_modules/svgo/lib/util/map-nodes-to-parents.js

@@ -0,0 +1,29 @@
+import { visit } from './visit.js';
+
+/**
+ * Maps all nodes to their parent node recursively.
+ *
+ * @param {import('../types.js').XastParent} node
+ * @returns {Map<import('../types.js').XastNode, import('../types.js').XastParent>}
+ */
+export function mapNodesToParents(node) {
+  /** @type {Map<import('../types.js').XastNode, import('../types.js').XastParent>} */
+  const parents = new Map();
+
+  for (const child of node.children) {
+    parents.set(child, node);
+    visit(
+      child,
+      {
+        element: {
+          enter: (child, parent) => {
+            parents.set(child, parent);
+          },
+        },
+      },
+      node,
+    );
+  }
+
+  return parents;
+}

node_modules/svgo/lib/util/visit.js

@@ -0,0 +1,36 @@
+export const visitSkip = Symbol();
+
+/**
+ * @param {import('../types.js').XastNode} node
+ * @param {import('../types.js').Visitor} visitor
+ * @param {any=} parentNode
+ */
+export const visit = (node, visitor, parentNode) => {
+  const callbacks = visitor[node.type];
+  if (callbacks?.enter) {
+    // @ts-expect-error hard to infer
+    const symbol = callbacks.enter(node, parentNode);
+    if (symbol === visitSkip) {
+      return;
+    }
+  }
+  // visit root children
+  if (node.type === 'root') {
+    // copy children array to not lose cursor when children is spliced
+    for (const child of node.children) {
+      visit(child, visitor, node);
+    }
+  }
+  // visit element children if still attached to parent
+  if (node.type === 'element') {
+    if (parentNode.children.includes(node)) {
+      for (const child of node.children) {
+        visit(child, visitor, node);
+      }
+    }
+  }
+  if (callbacks?.exit) {
+    // @ts-expect-error hard to infer
+    callbacks.exit(node, parentNode);
+  }
+};