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/*
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/IDAllocator.h>
#include <LibWeb/HTML/EventLoop/EventLoop.h>
#include <LibWeb/Platform/Timer.h>
namespace Web::HTML {
struct AnimationFrameCallbackDriver {
using Callback = Function<void(i32)>;
AnimationFrameCallbackDriver()
{
m_timer = Platform::Timer::create_single_shot(16, [] {
HTML::main_thread_event_loop().schedule();
});
}
i32 add(Callback handler)
{
auto id = m_id_allocator.allocate();
m_callbacks.set(id, move(handler));
if (!m_timer->is_active())
m_timer->start();
return id;
}
bool remove(i32 id)
{
auto it = m_callbacks.find(id);
if (it == m_callbacks.end())
return false;
m_callbacks.remove(it);
m_id_allocator.deallocate(id);
return true;
}
void run()
{
auto taken_callbacks = move(m_callbacks);
for (auto& [id, callback] : taken_callbacks)
callback(id);
}
bool has_callbacks() const
{
return !m_callbacks.is_empty();
}
private:
HashMap<i32, Callback> m_callbacks;
IDAllocator m_id_allocator;
RefPtr<Platform::Timer> m_timer;
};
}
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