WheelEventTestMonitor.h [plain text]
#pragma once
#include "PlatformWheelEvent.h"
#include <functional>
#include <wtf/Function.h>
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WebCore {
class Page;
class WheelEventTestMonitor : public ThreadSafeRefCounted<WheelEventTestMonitor> {
WTF_MAKE_NONCOPYABLE(WheelEventTestMonitor); WTF_MAKE_FAST_ALLOCATED;
public:
WheelEventTestMonitor(Page&);
WEBCORE_EXPORT void setTestCallbackAndStartMonitoring(bool expectWheelEndOrCancel, bool expectMomentumEnd, WTF::Function<void()>&&);
WEBCORE_EXPORT void clearAllTestDeferrals();
enum DeferReason {
HandlingWheelEvent = 1 << 0,
HandlingWheelEventOnMainThread = 1 << 1,
PostMainThreadWheelEventHandling = 1 << 2,
RubberbandInProgress = 1 << 3,
ScrollSnapInProgress = 1 << 4,
ScrollingThreadSyncNeeded = 1 << 5,
ContentScrollInProgress = 1 << 6,
RequestedScrollPosition = 1 << 7,
};
typedef const void* ScrollableAreaIdentifier;
WEBCORE_EXPORT void receivedWheelEvent(const PlatformWheelEvent&);
WEBCORE_EXPORT void deferForReason(ScrollableAreaIdentifier, DeferReason);
WEBCORE_EXPORT void removeDeferralForReason(ScrollableAreaIdentifier, DeferReason);
void checkShouldFireCallbacks();
using ScrollableAreaReasonMap = WTF::HashMap<ScrollableAreaIdentifier, OptionSet<DeferReason>>;
private:
void scheduleCallbackCheck();
WTF::Function<void()> m_completionCallback;
Page& m_page;
Lock m_mutex;
ScrollableAreaReasonMap m_deferCompletionReasons;
bool m_expectWheelEndOrCancel { false };
bool m_receivedWheelEndOrCancel { false };
bool m_expectMomentumEnd { false };
bool m_receivedMomentumEnd { false };
bool m_everHadDeferral { false };
};
class WheelEventTestMonitorCompletionDeferrer {
public:
WheelEventTestMonitorCompletionDeferrer(WheelEventTestMonitor* monitor, WheelEventTestMonitor::ScrollableAreaIdentifier identifier, WheelEventTestMonitor::DeferReason reason)
: m_monitor(monitor)
, m_identifier(identifier)
, m_reason(reason)
{
if (m_monitor)
m_monitor->deferForReason(m_identifier, m_reason);
}
WheelEventTestMonitorCompletionDeferrer(WheelEventTestMonitorCompletionDeferrer&& other)
: m_monitor(WTFMove(other.m_monitor))
, m_identifier(other.m_identifier)
, m_reason(other.m_reason)
{
}
~WheelEventTestMonitorCompletionDeferrer()
{
if (m_monitor)
m_monitor->removeDeferralForReason(m_identifier, m_reason);
}
private:
RefPtr<WheelEventTestMonitor> m_monitor;
WheelEventTestMonitor::ScrollableAreaIdentifier m_identifier;
WheelEventTestMonitor::DeferReason m_reason;
};
WTF::TextStream& operator<<(WTF::TextStream&, WheelEventTestMonitor::DeferReason);
WTF::TextStream& operator<<(WTF::TextStream&, const WheelEventTestMonitor::ScrollableAreaReasonMap&);
}