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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/input/android_input_helper.h"
#include "base/metrics/histogram_macros.h"
#include "components/input/events_helper.h"
#include "components/input/render_input_router.h"
#include "components/input/render_widget_host_input_event_router.h"
#include "components/input/switches.h"
#include "ui/events/blink/blink_event_util.h"
#include "ui/events/blink/web_input_event_traits.h"
#include "ui/events/event_utils.h"
namespace input {
AndroidInputHelper::~AndroidInputHelper() = default;
AndroidInputHelper::AndroidInputHelper(RenderWidgetHostViewInput* view,
Delegate* delegate)
: view_(*view), delegate_(*delegate) {}
void AndroidInputHelper::RouteOrForwardTouchEvent(
blink::WebTouchEvent& web_event) {
RenderInputRouter* rir = view_->GetViewRenderInputRouter();
CHECK(rir);
ui::LatencyInfo latency_info;
latency_info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_UI_COMPONENT);
if (ShouldRouteEvents()) {
rir->delegate()->GetInputEventRouter()->RouteTouchEvent(&*view_, &web_event,
latency_info);
} else {
rir->ForwardTouchEventWithLatencyInfo(web_event, latency_info);
}
}
void AndroidInputHelper::RouteOrForwardGestureEvent(
const blink::WebGestureEvent& event) {
RenderInputRouter* rir = view_->GetViewRenderInputRouter();
CHECK(rir);
ui::LatencyInfo latency_info;
if (ShouldRouteEvents()) {
blink::WebGestureEvent gesture_event(event);
rir->delegate()->GetInputEventRouter()->RouteGestureEvent(
&*view_, &gesture_event, latency_info);
} else {
rir->ForwardGestureEventWithLatencyInfo(event, latency_info);
}
}
bool AndroidInputHelper::ShouldRouteEvents() const {
CHECK(view_->GetViewRenderInputRouter());
return view_->GetViewRenderInputRouter()->delegate() &&
view_->GetViewRenderInputRouter()->delegate()->GetInputEventRouter();
}
void AndroidInputHelper::ResetGestureDetection() {
ui::FilteredGestureProvider& gesture_provider =
delegate_->GetGestureProvider();
const ui::MotionEvent* current_down_event =
gesture_provider.GetCurrentDownEvent();
if (!current_down_event) {
// A hard reset ensures prevention of any timer-based events that might fire
// after a touch sequence has ended.
gesture_provider.ResetDetection();
return;
}
std::unique_ptr<ui::MotionEvent> cancel_event = current_down_event->Cancel();
if (gesture_provider.OnTouchEvent(*cancel_event).succeeded) {
blink::WebTouchEvent web_event = ui::CreateWebTouchEventFromMotionEvent(
*cancel_event, false /* may_cause_scrolling */, false /* hovering */);
RouteOrForwardTouchEvent(web_event);
}
}
bool AndroidInputHelper::RequiresDoubleTapGestureEvents() const {
return true;
}
void AndroidInputHelper::OnGestureEvent(const ui::GestureEventData& gesture) {
if ((gesture.type() == ui::EventType::kGesturePinchBegin ||
gesture.type() == ui::EventType::kGesturePinchUpdate ||
gesture.type() == ui::EventType::kGesturePinchEnd) &&
!switches::IsPinchToZoomEnabled()) {
return;
}
blink::WebGestureEvent web_gesture =
ui::CreateWebGestureEventFromGestureEventData(gesture);
// TODO(jdduke): Remove this workaround after Android fixes UiAutomator to
// stop providing shift meta values to synthetic MotionEvents. This prevents
// unintended shift+click interpretation of all accessibility clicks.
// See crbug.com/443247.
if (web_gesture.GetType() == blink::WebInputEvent::Type::kGestureTap &&
web_gesture.GetModifiers() == blink::WebInputEvent::kShiftKey) {
web_gesture.SetModifiers(blink::WebInputEvent::kNoModifiers);
}
delegate_->SendGestureEvent(web_gesture);
}
void AndroidInputHelper::ProcessAckedTouchEvent(
const input::TouchEventWithLatencyInfo& touch,
blink::mojom::InputEventResultState ack_result) {
const bool event_consumed =
ack_result == blink::mojom::InputEventResultState::kConsumed;
// |is_source_touch_event_set_non_blocking| defines a blocking behaviour of
// the future inputs.
const bool is_source_touch_event_set_non_blocking =
input::InputEventResultStateIsSetBlocking(ack_result);
// |was_touch_blocked| indicates whether the current event was dispatched
// blocking to the Renderer.
const bool was_touch_blocked =
ui::WebInputEventTraits::ShouldBlockEventStream(touch.event);
delegate_->GetGestureProvider().OnTouchEventAck(
touch.event.unique_touch_event_id, event_consumed,
is_source_touch_event_set_non_blocking,
was_touch_blocked
? std::make_optional(touch.event.GetEventLatencyMetadata())
: std::nullopt);
if (touch.event.touch_start_or_first_touch_move && event_consumed &&
view_->GetViewRenderInputRouter()->delegate() &&
view_->GetViewRenderInputRouter()->delegate()->GetInputEventRouter()) {
view_->GetViewRenderInputRouter()
->delegate()
->GetInputEventRouter()
->OnHandledTouchStartOrFirstTouchMove(
touch.event.unique_touch_event_id);
}
}
bool AndroidInputHelper::TransformPointToCoordSpaceForView(
const gfx::PointF& point,
input::RenderWidgetHostViewInput* target_view,
gfx::PointF* transformed_point) {
if (target_view == &*view_) {
*transformed_point = point;
return true;
}
if (!view_->GetFrameSinkId().is_valid()) {
return false;
}
// In TransformPointToLocalCoordSpace() there is a Point-to-Pixel
// conversion, but it is not necessary here because the final target view
// is responsible for converting before computing the final transform.
return target_view->TransformPointToLocalCoordSpace(
point, view_->GetFrameSinkId(), transformed_point);
}
void AndroidInputHelper::RecordToolTypeForActionDown(
const ui::MotionEventAndroid& event) {
ui::MotionEventAndroid::Action action = event.GetAction();
if (action == ui::MotionEventAndroid::Action::DOWN ||
action == ui::MotionEventAndroid::Action::POINTER_DOWN ||
action == ui::MotionEventAndroid::Action::BUTTON_PRESS) {
UMA_HISTOGRAM_ENUMERATION(
"Event.AndroidActionDown.ToolType",
static_cast<int>(event.GetToolType(0)),
static_cast<int>(ui::MotionEventAndroid::ToolType::LAST) + 1);
}
}
void AndroidInputHelper::ComputeEventLatencyOSTouchHistograms(
const ui::MotionEvent& event,
const base::TimeTicks& processing_time) {
ui::EventType event_type;
switch (event.GetAction()) {
case ui::MotionEvent::Action::DOWN:
case ui::MotionEvent::Action::POINTER_DOWN:
event_type = ui::EventType::kTouchPressed;
break;
case ui::MotionEvent::Action::MOVE:
event_type = ui::EventType::kTouchMoved;
break;
case ui::MotionEvent::Action::UP:
case ui::MotionEvent::Action::POINTER_UP:
event_type = ui::EventType::kTouchReleased;
break;
default:
return;
}
ui::ComputeEventLatencyOS(event_type, event.GetEventTime(), processing_time);
}
} // namespace input
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