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// Copyright 2013 The Chromium Authors. All rights reserved.
// 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/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "jni/SyntheticGestureTarget_jni.h"
#include "third_party/blink/public/platform/web_input_event.h"
#include "third_party/blink/public/platform/web_mouse_event.h"
#include "third_party/blink/public/platform/web_mouse_wheel_event.h"
#include "third_party/blink/public/platform/web_touch_event.h"
#include "ui/android/view_android.h"
#include "ui/gfx/android/view_configuration.h"
using base::android::JavaParamRef;
using base::android::ScopedJavaLocalRef;
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()));
}
SyntheticGestureTargetAndroid::~SyntheticGestureTargetAndroid() = default;
void SyntheticGestureTargetAndroid::TouchSetPointer(int index,
int x,
int 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(int x,
int y,
int dx,
int 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,
base::TimeTicks time) {
TRACE_EVENT0("input", "SyntheticGestureTargetAndroid::TouchInject");
JNIEnv* env = base::android::AttachCurrentThread();
Java_SyntheticGestureTarget_inject(env, java_ref_, action, pointer_count,
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::kTouchStart:
action = MOTION_EVENT_ACTION_START;
break;
case WebInputEvent::kTouchMove:
action = MOTION_EVENT_ACTION_MOVE;
break;
case WebInputEvent::kTouchCancel:
action = MOTION_EVENT_ACTION_CANCEL;
break;
case WebInputEvent::kTouchEnd:
action = MOTION_EVENT_ACTION_END;
break;
default:
NOTREACHED();
}
const unsigned num_touches = web_touch.touches_length;
for (unsigned i = 0; i < num_touches; ++i) {
const blink::WebTouchPoint* point = &web_touch.touches[i];
TouchSetPointer(i, point->PositionInWidget().x, point->PositionInWidget().y,
point->id);
}
TouchInject(action, num_touches, 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);
TouchInject(MOTION_EVENT_ACTION_SCROLL, 1, web_wheel.TimeStamp());
}
void SyntheticGestureTargetAndroid::DispatchWebMouseEventToPlatform(
const WebMouseEvent& web_mouse,
const ui::LatencyInfo&) {
CHECK(false);
}
SyntheticGestureParams::GestureSourceType
SyntheticGestureTargetAndroid::GetDefaultSyntheticGestureSourceType() const {
return SyntheticGestureParams::TOUCH_INPUT;
}
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();
}
} // namespace content
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