From 9a370a5eedd0fe53d01b8fdf19f69de98630a312 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Tue, 4 Apr 2023 09:06:10 -0400
Subject: [PATCH] LibWeb: Support taking matching tasks out of a task queue

This will be needed for HTMLMediaElement.
---
 .../LibWeb/HTML/EventLoop/TaskQueue.cpp        | 18 ++++++++++++++++++
 .../LibWeb/HTML/EventLoop/TaskQueue.h          |  1 +
 2 files changed, 19 insertions(+)

diff --git a/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.cpp b/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.cpp
index a8c8a51905d..dcfa458baf1 100644
--- a/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.cpp
+++ b/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.cpp
@@ -53,4 +53,22 @@ void TaskQueue::remove_tasks_matching(Function<bool(HTML::Task const&)> filter)
     });
 }
 
+ErrorOr<Vector<NonnullOwnPtr<Task>>> TaskQueue::take_tasks_matching(Function<bool(HTML::Task const&)> filter)
+{
+    Vector<NonnullOwnPtr<Task>> matching_tasks;
+
+    for (size_t i = 0; i < m_tasks.size();) {
+        auto& task = m_tasks.at(i);
+
+        if (filter(*task)) {
+            TRY(matching_tasks.try_append(move(task)));
+            m_tasks.remove(i);
+        } else {
+            ++i;
+        }
+    }
+
+    return matching_tasks;
+}
+
 }
diff --git a/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.h b/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.h
index f3e31c4facb..59454efa5af 100644
--- a/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.h
+++ b/Userland/Libraries/LibWeb/HTML/EventLoop/TaskQueue.h
@@ -32,6 +32,7 @@ public:
     }
 
     void remove_tasks_matching(Function<bool(HTML::Task const&)>);
+    ErrorOr<Vector<NonnullOwnPtr<Task>>> take_tasks_matching(Function<bool(HTML::Task const&)>);
 
 private:
     HTML::EventLoop& m_event_loop;