// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ANDROID_EVENT_FORWARDER_H_
#define UI_ANDROID_EVENT_FORWARDER_H_
#include "base/android/scoped_java_ref.h"
#include "base/memory/raw_ptr.h"
#include "base/observer_list.h"
#include "ui/android/ui_android_export.h"
namespace ui {
class MotionEventAndroid;
class ViewAndroid;
class UI_ANDROID_EXPORT EventForwarder {
public:
// Interface for observing events on the `EventForwarder`.
class Observer : public base::CheckedObserver {
public:
~Observer() override = default;
virtual void OnTouchEvent(const ui::MotionEventAndroid&) {}
virtual void OnMouseEvent(const ui::MotionEventAndroid&) {}
virtual void OnGenericMotionEvent(const ui::MotionEventAndroid&) {}
};
EventForwarder(const EventForwarder&) = delete;
EventForwarder& operator=(const EventForwarder&) = delete;
~EventForwarder();
base::android::ScopedJavaLocalRef<jobject> GetJavaWindowAndroid(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj);
// |oldest_event_time| and |latest_event_time| would be same for a MotionEvent
// without any historical events attached to it. For cases when there are
// historical events |oldest_event_time| will be the event time of earliest
// input i.e. MotionEvent.getHistoricalEventTimeNanos(0) and
// |latest_event_time| will be the event time of most recent event i.e.
// MotionEvent.getEventTimeNanos().
jboolean OnTouchEvent(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
const base::android::JavaParamRef<jobject>& motion_event,
jlong oldest_event_time_ns,
jlong latest_event_time_ns,
jint android_action,
jint pointer_count,
jint history_size,
jint action_index,
jfloat pos_x_0,
jfloat pos_y_0,
jfloat pos_x_1,
jfloat pos_y_1,
jint pointer_id_0,
jint pointer_id_1,
jfloat touch_major_0,
jfloat touch_major_1,
jfloat touch_minor_0,
jfloat touch_minor_1,
jfloat orientation_0,
jfloat orientation_1,
jfloat tilt_0,
jfloat tilt_1,
jfloat raw_pos_x,
jfloat raw_pos_y,
jint android_tool_type_0,
jint android_tool_type_1,
jint android_gesture_classification,
jint android_button_state,
jint android_meta_state,
jboolean is_touch_handle_event);
void OnMouseEvent(JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
jlong time_ns,
jint android_action,
jfloat x,
jfloat y,
jint pointer_id,
jfloat pressure,
jfloat orientation,
jfloat tilt,
jint android_changed_button,
jint android_button_state,
jint android_meta_state,
jint tool_type);
void OnDragEvent(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jint action,
jfloat x,
jfloat y,
jfloat screen_x,
jfloat screen_y,
const base::android::JavaParamRef<jobjectArray>& j_mimeTypes,
const base::android::JavaParamRef<jstring>& j_content,
const base::android::JavaParamRef<jobjectArray>& j_filenames,
const base::android::JavaParamRef<jstring>& j_text,
const base::android::JavaParamRef<jstring>& j_html,
const base::android::JavaParamRef<jstring>& j_url);
jboolean OnGestureEvent(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jint type,
jlong time_ms,
jfloat scale);
jboolean OnGenericMotionEvent(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
const base::android::JavaParamRef<jobject>& motion_event,
jlong time_ns);
jboolean OnKeyUp(JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
const base::android::JavaParamRef<jobject>& key_event,
jint key_code);
jboolean DispatchKeyEvent(
JNIEnv* env,
const base::android::JavaParamRef<jobject>& obj,
const base::android::JavaParamRef<jobject>& motion_event);
void ScrollBy(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jfloat delta_x,
jfloat delta_y);
void ScrollTo(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jfloat x,
jfloat y);
void DoubleTap(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jlong time_ms,
jint x,
jint y);
void StartFling(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jlong time_ms,
jfloat velocity_x,
jfloat velocity_y,
jboolean synthetic_scroll,
jboolean prevent_boosting);
void CancelFling(JNIEnv* env,
const base::android::JavaParamRef<jobject>& jobj,
jlong time_ms,
jboolean prevent_boosting);
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
friend class ViewAndroid;
explicit EventForwarder(ViewAndroid* view);
base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
// last_x_pos_ & last_y_pos_ are only used for trace events (see b/315762684
// for a relevant investigation). They are useful in debugging but could be
// removed easily if needed.
float last_x_pos_{-1.0};
float last_y_pos_{-1.0};
const raw_ptr<ViewAndroid> view_;
base::android::ScopedJavaGlobalRef<jobject> java_obj_;
base::ObserverList<Observer> observers_;
bool send_touch_moves_to_observers;
};
} // namespace ui
#endif // UI_ANDROID_EVENT_FORWARDER_H_
Codebase Browser
chromium