1 files changed, 145 insertions, 0 deletions
diff --git a/node_modules/domutils/lib/esm/querying.js b/node_modules/domutils/lib/esm/querying.js
new file mode 100644
index 00000000..c0074269
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+++ b/node_modules/domutils/lib/esm/querying.js
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+import { isTag, hasChildren } from "domhandler";
+/**
+ * Search a node and its children for nodes passing a test function. If `node` is not an array, it will be wrapped in one.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param node Node to search. Will be included in the result set if it matches.
+ * @param recurse Also consider child nodes.
+ * @param limit Maximum number of nodes to return.
+ * @returns All nodes passing `test`.
+ */
+export function filter(test, node, recurse = true, limit = Infinity) {
+    return find(test, Array.isArray(node) ? node : [node], recurse, limit);
+}
+/**
+ * Search an array of nodes and their children for nodes passing a test function.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param nodes Array of nodes to search.
+ * @param recurse Also consider child nodes.
+ * @param limit Maximum number of nodes to return.
+ * @returns All nodes passing `test`.
+ */
+export function find(test, nodes, recurse, limit) {
+    const result = [];
+    /** Stack of the arrays we are looking at. */
+    const nodeStack = [nodes];
+    /** Stack of the indices within the arrays. */
+    const indexStack = [0];
+    for (;;) {
+        // First, check if the current array has any more elements to look at.
+        if (indexStack[0] >= nodeStack[0].length) {
+            // If we have no more arrays to look at, we are done.
+            if (indexStack.length === 1) {
+                return result;
+            }
+            // Otherwise, remove the current array from the stack.
+            nodeStack.shift();
+            indexStack.shift();
+            // Loop back to the start to continue with the next array.
+            continue;
+        }
+        const elem = nodeStack[0][indexStack[0]++];
+        if (test(elem)) {
+            result.push(elem);
+            if (--limit <= 0)
+                return result;
+        }
+        if (recurse && hasChildren(elem) && elem.children.length > 0) {
+            /*
+             * Add the children to the stack. We are depth-first, so this is
+             * the next array we look at.
+             */
+            indexStack.unshift(0);
+            nodeStack.unshift(elem.children);
+        }
+    }
+}
+/**
+ * Finds the first element inside of an array that matches a test function. This is an alias for `Array.prototype.find`.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param nodes Array of nodes to search.
+ * @returns The first node in the array that passes `test`.
+ * @deprecated Use `Array.prototype.find` directly.
+ */
+export function findOneChild(test, nodes) {
+    return nodes.find(test);
+}
+/**
+ * Finds one element in a tree that passes a test.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param nodes Node or array of nodes to search.
+ * @param recurse Also consider child nodes.
+ * @returns The first node that passes `test`.
+ */
+export function findOne(test, nodes, recurse = true) {
+    let elem = null;
+    for (let i = 0; i < nodes.length && !elem; i++) {
+        const node = nodes[i];
+        if (!isTag(node)) {
+            continue;
+        }
+        else if (test(node)) {
+            elem = node;
+        }
+        else if (recurse && node.children.length > 0) {
+            elem = findOne(test, node.children, true);
+        }
+    }
+    return elem;
+}
+/**
+ * Checks if a tree of nodes contains at least one node passing a test.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param nodes Array of nodes to search.
+ * @returns Whether a tree of nodes contains at least one node passing the test.
+ */
+export function existsOne(test, nodes) {
+    return nodes.some((checked) => isTag(checked) &&
+        (test(checked) || existsOne(test, checked.children)));
+}
+/**
+ * Search an array of nodes and their children for elements passing a test function.
+ *
+ * Same as `find`, but limited to elements and with less options, leading to reduced complexity.
+ *
+ * @category Querying
+ * @param test Function to test nodes on.
+ * @param nodes Array of nodes to search.
+ * @returns All nodes passing `test`.
+ */
+export function findAll(test, nodes) {
+    const result = [];
+    const nodeStack = [nodes];
+    const indexStack = [0];
+    for (;;) {
+        if (indexStack[0] >= nodeStack[0].length) {
+            if (nodeStack.length === 1) {
+                return result;
+            }
+            // Otherwise, remove the current array from the stack.
+            nodeStack.shift();
+            indexStack.shift();
+            // Loop back to the start to continue with the next array.
+            continue;
+        }
+        const elem = nodeStack[0][indexStack[0]++];
+        if (!isTag(elem))
+            continue;
+        if (test(elem))
+            result.push(elem);
+        if (elem.children.length > 0) {
+            indexStack.unshift(0);
+            nodeStack.unshift(elem.children);
+        }
+    }
+}
+//# sourceMappingURL=querying.js.map
+\ No newline at end of file