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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/input/synthetic_gesture_target_android.h"
#include "base/trace_event/trace_event.h"
#include "content/browser/renderer_host/compositor_impl_android.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_android.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "third_party/blink/public/common/input/web_input_event.h"
#include "third_party/blink/public/common/input/web_mouse_event.h"
#include "third_party/blink/public/common/input/web_mouse_wheel_event.h"
#include "third_party/blink/public/common/input/web_touch_event.h"
#include "ui/android/view_android.h"
#include "ui/compositor/compositor.h"
#include "ui/gfx/android/view_configuration.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "content/public/android/content_jni_headers/SyntheticGestureTarget_jni.h"
using base::android::JavaParamRef;
using base::android::ScopedJavaLocalRef;
using blink::WebGestureEvent;
using blink::WebInputEvent;
using blink::WebMouseEvent;
using blink::WebMouseWheelEvent;
using blink::WebTouchEvent;
namespace content {
SyntheticGestureTargetAndroid::SyntheticGestureTargetAndroid(
RenderWidgetHostImpl* host,
ui::ViewAndroid* view)
: SyntheticGestureTargetBase(host), view_(view) {
JNIEnv* env = base::android::AttachCurrentThread();
java_ref_.Reset(
Java_SyntheticGestureTarget_create(env, view->GetContainerView()));
ui::WindowAndroid* window = view_->GetWindowAndroid();
if (!window) {
return;
}
observed_compositor_ = static_cast<CompositorImpl*>(window->GetCompositor());
if (observed_compositor_) {
observed_compositor_->AddSimpleBeginFrameObserver(this);
}
}
SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() {
if (observed_compositor_) {
observed_compositor_->RemoveSimpleBeginFrameObserver(this);
observed_compositor_ = nullptr;
}
}
void SyntheticGestureTargetAndroid::TouchSetPointer(int index,
float x,
float y,
int id) {
TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetPointer");
JNIEnv* env = base::android::AttachCurrentThread();
float scale_factor = view_->GetDipScale();
Java_SyntheticGestureTarget_setPointer(
env, java_ref_, index, x * scale_factor, y * scale_factor, id);
}
void SyntheticGestureTargetAndroid::TouchSetScrollDeltas(float x,
float y,
float dx,
float dy) {
TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchSetScrollDeltas");
JNIEnv* env = base::android::AttachCurrentThread();
// Android motion events work by passing the number of wheel ticks and pixels
// per tick so the deltas should be passed in as number of ticks.
int wheel_ticks_multiplier =
render_widget_host()->GetView()->GetMouseWheelMinimumGranularity();
if (wheel_ticks_multiplier) {
dx /= wheel_ticks_multiplier;
dy /= wheel_ticks_multiplier;
}
Java_SyntheticGestureTarget_setScrollDeltas(env, java_ref_, x, y, dx, dy);
}
void SyntheticGestureTargetAndroid::TouchInject(MotionEventAction action,
int pointer_count,
int pointer_index,
base::TimeTicks time) {
TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchInject");
JNIEnv* env = base::android::AttachCurrentThread();
Java_SyntheticGestureTarget_inject(env, java_ref_, action, pointer_count,
pointer_index,
time.since_origin().InMilliseconds());
}
void SyntheticGestureTargetAndroid::DispatchWebTouchEventToPlatform(
const WebTouchEvent& web_touch,
const ui::LatencyInfo&) {
MotionEventAction action = MOTION_EVENT_ACTION_INVALID;
switch (web_touch.GetType()) {
case WebInputEvent::Type::kTouchStart:
action = MOTION_EVENT_ACTION_START;
break;
case WebInputEvent::Type::kTouchMove:
action = MOTION_EVENT_ACTION_MOVE;
break;
case WebInputEvent::Type::kTouchCancel:
action = MOTION_EVENT_ACTION_CANCEL;
break;
case WebInputEvent::Type::kTouchEnd:
action = MOTION_EVENT_ACTION_END;
break;
default:
NOTREACHED();
}
const unsigned num_touches = web_touch.touches_length;
int touch_index = -1;
DCHECK_LE(num_touches, 2u);
for (unsigned i = 0; i < num_touches; ++i) {
const blink::WebTouchPoint* point = &web_touch.touches[i];
if (point->state != blink::WebTouchPoint::State::kStateStationary) {
if (action == MOTION_EVENT_ACTION_START ||
action == MOTION_EVENT_ACTION_END) {
// We should have only one non-stationary touch for start/end.
DCHECK_EQ(touch_index, -1);
}
touch_index = i;
}
TouchSetPointer(i, point->PositionInWidget().x(),
point->PositionInWidget().y(), point->id);
}
DCHECK_GE(touch_index, 0);
TouchInject(action, num_touches, touch_index, web_touch.TimeStamp());
}
void SyntheticGestureTargetAndroid::DispatchWebMouseWheelEventToPlatform(
const WebMouseWheelEvent& web_wheel,
const ui::LatencyInfo&) {
TouchSetScrollDeltas(web_wheel.PositionInWidget().x(),
web_wheel.PositionInWidget().y(), web_wheel.delta_x,
web_wheel.delta_y);
// We only have a single pointer.
const unsigned pointer_index = 0;
const unsigned num_pointers = 1;
TouchInject(MOTION_EVENT_ACTION_SCROLL, num_pointers, pointer_index,
web_wheel.TimeStamp());
}
void SyntheticGestureTargetAndroid::DispatchWebGestureEventToPlatform(
const WebGestureEvent& web_gesture,
const ui::LatencyInfo& latency_info) {
DCHECK_EQ(blink::WebGestureDevice::kTouchpad, web_gesture.SourceDevice());
DCHECK(blink::WebInputEvent::IsPinchGestureEventType(web_gesture.GetType()) ||
blink::WebInputEvent::IsFlingGestureEventType(web_gesture.GetType()));
GetView()->SendGestureEvent(web_gesture);
}
void SyntheticGestureTargetAndroid::DispatchWebMouseEventToPlatform(
const WebMouseEvent& web_mouse,
const ui::LatencyInfo& info) {
GetView()->SendMouseEvent(web_mouse, info);
}
content::mojom::GestureSourceType
SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
return content::mojom::GestureSourceType::kTouchInput;
}
void SyntheticGestureTargetAndroid::GetVSyncParameters(
base::TimeTicks& timebase,
base::TimeDelta& interval) const {
timebase = vsync_timebase_;
interval = vsync_interval_;
}
void SyntheticGestureTargetAndroid::OnBeginFrame(
base::TimeTicks frame_begin_time,
base::TimeDelta frame_interval,
std::optional<base::TimeTicks> first_coalesced_frame_begin_time) {
vsync_timebase_ = frame_begin_time;
vsync_interval_ = frame_interval;
}
void SyntheticGestureTargetAndroid::OnBeginFrameSourceShuttingDown() {
if (observed_compositor_) {
observed_compositor_->RemoveSimpleBeginFrameObserver(this);
observed_compositor_ = nullptr;
}
}
float SyntheticGestureTargetAndroid::GetTouchSlopInDips() const {
// TODO(jdduke): Have all targets use the same ui::GestureConfiguration
// codepath.
return gfx::ViewConfiguration::GetTouchSlopInDips();
}
float SyntheticGestureTargetAndroid::GetMinScalingSpanInDips() const {
// TODO(jdduke): Have all targets use the same ui::GestureConfiguration
// codepath.
return gfx::ViewConfiguration::GetMinScalingSpanInDips();
}
RenderWidgetHostViewAndroid* SyntheticGestureTargetAndroid::GetView() const {
auto* view = static_cast<RenderWidgetHostViewAndroid*>(
render_widget_host()->GetView());
DCHECK(view);
return view;
}
} // namespace content
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