touch_disposition_gesture_filter.cc

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/events/gesture_detection/touch_disposition_gesture_filter.h"

#include <stddef.h>

#include "base/auto_reset.h"
#include "base/check_op.h"
#include "base/notreached.h"
#include "base/trace_event/typed_macros.h"
#include "base/types/cxx23_to_underlying.h"
#include "ui/base/ui_base_features.h"
#include "ui/events/gesture_event_details.h"

namespace ui {
namespace {

// A BitSet32 is used for tracking dropped gesture types.
static_assert …;

GestureEventData CreateGesture(EventType type,
                               int motion_event_id,
                               MotionEvent::ToolType primary_tool_type,
                               const GestureEventDataPacket& packet) { … }

enum RequiredTouches { … };

struct DispositionHandlingInfo { … };

DispositionHandlingInfo Info(int required_touches) { … }

DispositionHandlingInfo Info(int required_touches,
                             EventType antecedent_event_type) { … }

// This approach to disposition handling is described at http://goo.gl/5G8PWJ.
DispositionHandlingInfo GetDispositionHandlingInfo(EventType type) { … }

int GetGestureTypeIndex(EventType type) { … }

bool IsTouchStartEvent(GestureEventDataPacket::GestureSource gesture_source) { … }

bool DoAddInputTimestampsToGesture(const GestureEventData& gesture_data) { … }

}  // namespace

// TouchDispositionGestureFilter

TouchDispositionGestureFilter::TouchDispositionGestureFilter(
    TouchDispositionGestureFilterClient* client)
    : … { … }

TouchDispositionGestureFilter::~TouchDispositionGestureFilter() { … }

TouchDispositionGestureFilter::PacketResult
TouchDispositionGestureFilter::OnGesturePacket(
    const GestureEventDataPacket& packet) { … }

void TouchDispositionGestureFilter::OnTouchEventAck(
    uint32_t unique_touch_event_id,
    bool event_consumed,
    bool is_source_touch_event_set_blocking,
    const std::optional<EventLatencyMetadata>& event_latency_metadata) { … }

void TouchDispositionGestureFilter::SendAckedEvents(
    const std::optional<EventLatencyMetadata>& event_latency_metadata) { … }

bool TouchDispositionGestureFilter::IsEmpty() const { … }

void TouchDispositionGestureFilter::ResetGestureHandlingState() { … }

void TouchDispositionGestureFilter::FilterAndSendPacket(
    const GestureEventDataPacket& packet) { … }

void TouchDispositionGestureFilter::SendGesture(
    const GestureEventData& event,
    const GestureEventDataPacket& packet_being_sent) { … }

void TouchDispositionGestureFilter::CancelTapIfNecessary(
    const GestureEventDataPacket& packet_being_sent) { … }

void TouchDispositionGestureFilter::CancelFlingIfNecessary(
    const GestureEventDataPacket& packet_being_sent) { … }

void TouchDispositionGestureFilter::EndScrollIfNecessary(
    const GestureEventDataPacket& packet_being_sent) { … }

void TouchDispositionGestureFilter::PopGestureSequence() { … }

TouchDispositionGestureFilter::GestureSequence&
TouchDispositionGestureFilter::Head() { … }

TouchDispositionGestureFilter::GestureSequence&
TouchDispositionGestureFilter::Tail() { … }

// TouchDispositionGestureFilter::GestureHandlingState

TouchDispositionGestureFilter::GestureHandlingState::GestureHandlingState()
    : … { … }

void TouchDispositionGestureFilter::GestureHandlingState::OnTouchEventAck(
    bool event_consumed,
    bool is_touch_start_event) { … }

bool TouchDispositionGestureFilter::GestureHandlingState::Filter(
    EventType gesture_type) { … }

bool TouchDispositionGestureFilter::GestureHandlingState::
    HasFilteredGestureType(EventType gesture_type) const { … }

}  // namespace content
chromium/ui/events/gesture_detection/touch_disposition_gesture_filter.cc
