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/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* 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. AND ITS CONTRIBUTORS ``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 ITS 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 "IdleCallbackController.h"
#include "Document.h"
#include "FrameDestructionObserverInlines.h"
#include "IdleDeadline.h"
#include "Page.h"
#include "Timer.h"
#include "WindowEventLoop.h"
#include <wtf/TZoneMallocInlines.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(IdleCallbackController);
IdleCallbackController::IdleCallbackController(Document& document)
: m_document(document)
{
}
int IdleCallbackController::queueIdleCallback(Ref<IdleRequestCallback>&& callback, Seconds timeout)
{
++m_idleCallbackIdentifier;
auto handle = m_idleCallbackIdentifier;
bool hasTimeout = timeout > 0_s;
m_idleRequestCallbacks.append({ handle, WTFMove(callback), hasTimeout ? std::optional { MonotonicTime::now() + timeout } : std::nullopt });
if (hasTimeout) {
Timer::schedule(timeout, [weakThis = WeakPtr { *this }, handle]() {
if (!weakThis)
return;
RefPtr document = weakThis->m_document.get();
if (!document)
return;
document->eventLoop().queueTask(TaskSource::IdleTask, [weakThis, handle]() {
if (!weakThis)
return;
weakThis->invokeIdleCallbackTimeout(handle);
});
});
}
if (RefPtr document = m_document.get())
document->protectedWindowEventLoop()->scheduleIdlePeriod();
return handle;
}
void IdleCallbackController::removeIdleCallback(int signedIdentifier)
{
if (signedIdentifier <= 0)
return;
unsigned identifier = signedIdentifier;
m_idleRequestCallbacks.removeAllMatching([identifier](auto& request) {
return request.identifier == identifier;
});
m_runnableIdleCallbacks.removeAllMatching([identifier](auto& request) {
return request.identifier == identifier;
});
}
// https://w3c.github.io/requestidlecallback/#start-an-idle-period-algorithm
void IdleCallbackController::startIdlePeriod()
{
for (auto& request : m_idleRequestCallbacks)
m_runnableIdleCallbacks.append(WTFMove(request));
m_idleRequestCallbacks.clear();
if (m_runnableIdleCallbacks.isEmpty())
return;
while (invokeIdleCallbacks()) { }
}
void IdleCallbackController::queueTaskToInvokeIdleCallbacks()
{
Ref document = *m_document;
document->eventLoop().queueTask(TaskSource::IdleTask, [this, document] {
RELEASE_ASSERT(document->idleCallbackController() == this);
while (invokeIdleCallbacks()) { }
});
}
// https://w3c.github.io/requestidlecallback/#invoke-idle-callbacks-algorithm
bool IdleCallbackController::invokeIdleCallbacks()
{
RefPtr document = m_document.get();
if (!document || !document->frame())
return false;
Ref windowEventLoop = document->windowEventLoop();
// FIXME: Implement "if the user-agent believes it should end the idle period early due to newly scheduled high-priority work, return from the algorithm."
auto now = MonotonicTime::now();
auto deadline = windowEventLoop->computeIdleDeadline();
if (now >= deadline || m_runnableIdleCallbacks.isEmpty())
return false;
auto request = m_runnableIdleCallbacks.takeFirst();
auto idleDeadline = IdleDeadline::create(request.timeout && *request.timeout < now ? IdleDeadline::DidTimeout::Yes : IdleDeadline::DidTimeout::No);
request.callback->handleEvent(idleDeadline.get());
return !m_runnableIdleCallbacks.isEmpty();
}
// https://w3c.github.io/requestidlecallback/#dfn-invoke-idle-callback-timeout-algorithm
void IdleCallbackController::invokeIdleCallbackTimeout(unsigned identifier)
{
if (!m_document)
return;
auto it = m_idleRequestCallbacks.findIf([identifier](auto& request) {
return request.identifier == identifier;
});
if (it == m_idleRequestCallbacks.end())
return;
auto idleDeadline = IdleDeadline::create(IdleDeadline::DidTimeout::Yes);
auto callback = WTFMove(it->callback);
m_idleRequestCallbacks.remove(it);
callback->handleEvent(idleDeadline.get());
}
} // namespace WebCore
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