From 8ab25f8d8cf7b9b4dbdabdc4792da6de7d2b8e6c Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 21 Mar 2022 23:28:46 +0100
Subject: [PATCH] LibWeb: Implement Range.surroundContents(newParent)

Here goes another Acid3 point :^)
---
 Userland/Libraries/LibWeb/DOM/Range.cpp | 38 +++++++++++++++++++++++++
 Userland/Libraries/LibWeb/DOM/Range.h   |  1 +
 Userland/Libraries/LibWeb/DOM/Range.idl |  1 +
 3 files changed, 40 insertions(+)

diff --git a/Userland/Libraries/LibWeb/DOM/Range.cpp b/Userland/Libraries/LibWeb/DOM/Range.cpp
index 48e94863d1..d44e6fdfb7 100644
--- a/Userland/Libraries/LibWeb/DOM/Range.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Range.cpp
@@ -864,4 +864,42 @@ ExceptionOr<void> Range::insert(NonnullRefPtr<Node> node)
     return {};
 }
 
+// https://dom.spec.whatwg.org/#dom-range-surroundcontents
+ExceptionOr<void> Range::surround_contents(NonnullRefPtr<Node> new_parent)
+{
+    // 1. If a non-Text node is partially contained in this, then throw an "InvalidStateError" DOMException.
+    Node* start_non_text_node = start_container();
+    if (is<Text>(*start_non_text_node))
+        start_non_text_node = start_non_text_node->parent_node();
+    Node* end_non_text_node = end_container();
+    if (is<Text>(*end_non_text_node))
+        end_non_text_node = end_non_text_node->parent_node();
+    if (start_non_text_node != end_non_text_node)
+        return InvalidStateError::create("Non-Text node is partially contained in range.");
+
+    // 2. If newParent is a Document, DocumentType, or DocumentFragment node, then throw an "InvalidNodeTypeError" DOMException.
+    if (is<Document>(*new_parent) || is<DocumentType>(*new_parent) || is<DocumentFragment>(*new_parent))
+        return InvalidNodeTypeError::create("Invalid parent node type");
+
+    // 3. Let fragment be the result of extracting this.
+    auto fragment_or_error = extract();
+    if (fragment_or_error.is_exception())
+        return fragment_or_error.exception();
+    auto fragment = fragment_or_error.release_value();
+
+    // 4. If newParent has children, then replace all with null within newParent.
+    if (new_parent->has_children())
+        new_parent->replace_all(nullptr);
+
+    // 5. Insert newParent into this.
+    if (auto result = insert(new_parent); result.is_exception())
+        return result.exception();
+
+    // 6. Append fragment to newParent.
+    new_parent->append_child(fragment);
+
+    // 7. Select newParent within this.
+    return select(*new_parent);
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/DOM/Range.h b/Userland/Libraries/LibWeb/DOM/Range.h
index 427254d3d8..ecd6fcf03f 100644
--- a/Userland/Libraries/LibWeb/DOM/Range.h
+++ b/Userland/Libraries/LibWeb/DOM/Range.h
@@ -64,6 +64,7 @@ public:
     ExceptionOr<NonnullRefPtr<DocumentFragment>> extract_contents();
 
     ExceptionOr<void> insert_node(NonnullRefPtr<Node>);
+    ExceptionOr<void> surround_contents(NonnullRefPtr<Node> new_parent);
 
     String to_string() const;
 
diff --git a/Userland/Libraries/LibWeb/DOM/Range.idl b/Userland/Libraries/LibWeb/DOM/Range.idl
index ac4bca149a..44224ff729 100644
--- a/Userland/Libraries/LibWeb/DOM/Range.idl
+++ b/Userland/Libraries/LibWeb/DOM/Range.idl
@@ -26,6 +26,7 @@ interface Range : AbstractRange {
 
     [CEReactions, NewObject] DocumentFragment extractContents();
     [CEReactions] undefined insertNode(Node node);
+    [CEReactions] undefined surroundContents(Node newParent);
 
     Range cloneRange();
     undefined detach();