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c33f6b2ff6
From https://html.spec.whatwg.org/#list-of-animation-frame-callbacks: Each target object has a map of animation frame callbacks, which is an ordered map that must be initially empty, and an animation frame callback identifier, which is a number that must initially be zero.
64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
/*
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/HashMap.h>
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#include <AK/IDAllocator.h>
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#include <LibWeb/HTML/EventLoop/EventLoop.h>
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#include <LibWeb/Platform/Timer.h>
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namespace Web::HTML {
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struct AnimationFrameCallbackDriver {
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using Callback = Function<void(i32)>;
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AnimationFrameCallbackDriver()
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{
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m_timer = Platform::Timer::create_single_shot(16, [] {
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HTML::main_thread_event_loop().schedule();
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});
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}
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i32 add(Callback handler)
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{
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auto id = m_id_allocator.allocate();
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m_callbacks.set(id, move(handler));
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if (!m_timer->is_active())
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m_timer->start();
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return id;
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}
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bool remove(i32 id)
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{
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auto it = m_callbacks.find(id);
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if (it == m_callbacks.end())
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return false;
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m_callbacks.remove(it);
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m_id_allocator.deallocate(id);
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return true;
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}
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void run(double now)
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{
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auto taken_callbacks = move(m_callbacks);
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for (auto& [id, callback] : taken_callbacks)
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callback(now);
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}
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bool has_callbacks() const
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{
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return !m_callbacks.is_empty();
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}
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private:
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OrderedHashMap<i32, Callback> m_callbacks;
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IDAllocator m_id_allocator;
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RefPtr<Platform::Timer> m_timer;
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};
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}
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