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/*
* Copyright (C) 2011 Google Inc. All Rights Reserved.
* Copyright (C) 2020 Metrological Group B.V.
* Copyright (C) 2020 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WorkerAnimationController.h"
#if ENABLE(OFFSCREEN_CANVAS)
#include "Performance.h"
#include "RequestAnimationFrameCallback.h"
#include "WorkerGlobalScope.h"
#include <wtf/Ref.h>
namespace WebCore {
Ref<WorkerAnimationController> WorkerAnimationController::create(WorkerGlobalScope& workerGlobalScope)
{
return adoptRef(*new WorkerAnimationController(workerGlobalScope));
}
WorkerAnimationController::WorkerAnimationController(WorkerGlobalScope& workerGlobalScope)
: ActiveDOMObject(&workerGlobalScope)
, m_workerGlobalScope(workerGlobalScope)
, m_animationTimer(*this, &WorkerAnimationController::animationTimerFired)
{
suspendIfNeeded();
}
WorkerAnimationController::~WorkerAnimationController()
{
ASSERT(!hasPendingActivity());
}
const char* WorkerAnimationController::activeDOMObjectName() const
{
return "WorkerAnimationController";
}
bool WorkerAnimationController::virtualHasPendingActivity() const
{
return m_animationTimer.isActive();
}
void WorkerAnimationController::stop()
{
m_animationTimer.stop();
}
void WorkerAnimationController::suspend(ReasonForSuspension)
{
m_savedIsActive = hasPendingActivity();
stop();
}
void WorkerAnimationController::resume()
{
if (m_savedIsActive) {
m_savedIsActive = false;
scheduleAnimation();
}
}
WorkerAnimationController::CallbackId WorkerAnimationController::requestAnimationFrame(Ref<RequestAnimationFrameCallback>&& callback)
{
// FIXME: There's a lot of missing throttling behaviour that's present on DOMDocument
WorkerAnimationController::CallbackId callbackId = ++m_nextAnimationCallbackId;
callback->m_firedOrCancelled = false;
callback->m_id = callbackId;
m_animationCallbacks.append(WTFMove(callback));
scheduleAnimation();
return callbackId;
}
void WorkerAnimationController::cancelAnimationFrame(CallbackId callbackId)
{
for (size_t i = 0; i < m_animationCallbacks.size(); ++i) {
auto& callback = m_animationCallbacks[i];
if (callback->m_id == callbackId) {
callback->m_firedOrCancelled = true;
m_animationCallbacks.remove(i);
return;
}
}
}
void WorkerAnimationController::scheduleAnimation()
{
if (!m_workerGlobalScope.requestAnimationFrameEnabled())
return;
if (m_animationTimer.isActive())
return;
Seconds animationInterval = RequestAnimationFrameCallback::fullSpeedAnimationInterval;
Seconds scheduleDelay = std::max(animationInterval - Seconds::fromMilliseconds(m_workerGlobalScope.performance().now() - m_lastAnimationFrameTimestamp), 0_s);
m_animationTimer.startOneShot(scheduleDelay);
}
void WorkerAnimationController::animationTimerFired()
{
m_lastAnimationFrameTimestamp = m_workerGlobalScope.performance().now();
serviceRequestAnimationFrameCallbacks(m_lastAnimationFrameTimestamp);
}
void WorkerAnimationController::serviceRequestAnimationFrameCallbacks(DOMHighResTimeStamp timestamp)
{
if (!m_animationCallbacks.size() || !m_workerGlobalScope.requestAnimationFrameEnabled())
return;
// First, generate a list of callbacks to consider. Callbacks registered from this point
// on are considered only for the "next" frame, not this one.
CallbackList callbacks(m_animationCallbacks);
for (auto& callback : callbacks) {
if (callback->m_firedOrCancelled)
continue;
callback->m_firedOrCancelled = true;
callback->handleEvent(timestamp);
}
// Remove any callbacks we fired from the list of pending callbacks.
m_animationCallbacks.removeAllMatching([](auto& callback) {
return callback->m_firedOrCancelled;
});
if (m_animationCallbacks.size())
scheduleAnimation();
}
} // namespace WebCore
#endif