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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_ATTRIBUTION_REPORTING_ATTRIBUTION_INPUT_EVENT_TRACKER_ANDROID_H_
#define CONTENT_BROWSER_ATTRIBUTION_REPORTING_ATTRIBUTION_INPUT_EVENT_TRACKER_ANDROID_H_
#include <jni.h>
#include <stdint.h>
#include <optional>
#include "base/android/scoped_java_ref.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
#include "ui/android/event_forwarder.h"
namespace ui {
class MotionEventAndroid;
} // namespace ui
namespace content {
class WebContents;
// A class that observes motion events per web contents and keeps track of the
// most recent event. An event filter may be applied to filter out invalid
// events.
class CONTENT_EXPORT AttributionInputEventTrackerAndroid
: public ui::EventForwarder::Observer {
public:
static constexpr base::TimeDelta kEventExpiry = base::Seconds(5);
struct InputEvent {
std::optional<uint32_t> id;
base::android::ScopedJavaGlobalRef<jobject> event;
InputEvent(std::optional<uint32_t> id,
base::android::ScopedJavaGlobalRef<jobject> event);
~InputEvent();
};
explicit AttributionInputEventTrackerAndroid(WebContents* web_contents);
AttributionInputEventTrackerAndroid(
const AttributionInputEventTrackerAndroid&) = delete;
AttributionInputEventTrackerAndroid& operator=(
const AttributionInputEventTrackerAndroid&) = delete;
AttributionInputEventTrackerAndroid(AttributionInputEventTrackerAndroid&&) =
delete;
AttributionInputEventTrackerAndroid& operator=(
AttributionInputEventTrackerAndroid&&) = delete;
~AttributionInputEventTrackerAndroid() override;
// Returns the most recent input event. The input event expires `kEventExpiry`
// after it was pushed, and expired event may be dropped.
InputEvent GetMostRecentEvent();
void RemoveObserverForTesting(WebContents* web_contents);
private:
friend class AttributionInputEventTrackerAndroidTest;
// ui::EventForwarder::Observer:
void OnTouchEvent(const ui::MotionEventAndroid& event) override;
void PushEvent(const ui::MotionEventAndroid& event);
base::android::ScopedJavaGlobalRef<jobject> most_recent_event_;
std::optional<uint32_t> most_recent_event_id_;
// The time that the most recent event was pushed and cached.
base::TimeTicks most_recent_event_cache_time_;
};
} // namespace content
#endif // CONTENT_BROWSER_ATTRIBUTION_REPORTING_ATTRIBUTION_INPUT_EVENT_TRACKER_ANDROID_H_
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