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/*
* Copyright 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <functional>
#include <list>
#include <map>
#include <memory>
#include <vector>
#include <utils/Timers.h>
#include "InputReaderContext.h"
#include "NotifyArgs.h"
#include "include/gestures.h"
namespace android {
extern const GesturesTimerProvider kGestureTimerProvider;
// Implementation of a gestures library timer provider, which allows the library to set and cancel
// callbacks.
class TimerProvider {
public:
TimerProvider(InputReaderContext& context);
virtual ~TimerProvider() = default;
// Disable copy and move, since pointers to TimerProvider objects are used in callbacks.
TimerProvider(const TimerProvider&) = delete;
TimerProvider& operator=(const TimerProvider&) = delete;
std::string dump();
void triggerCallbacks(nsecs_t when);
// Methods to be called by the gestures library:
GesturesTimer* createTimer();
void setDeadline(GesturesTimer* timer, nsecs_t delay, GesturesTimerCallback callback,
void* callbackData);
void cancelTimer(GesturesTimer* timer);
void freeTimer(GesturesTimer* timer);
protected:
// A wrapper for the system clock, to allow tests to override it.
virtual nsecs_t getCurrentTime();
private:
void setDeadlineWithoutRequestingTimeout(GesturesTimer* timer, nsecs_t delay,
GesturesTimerCallback callback, void* callbackData);
// Requests a timeout from the InputReader for the nearest deadline in mDeadlines. Must be
// called whenever mDeadlines is modified.
void requestTimeout();
InputReaderContext& mReaderContext;
int mNextTimerId = 0;
std::vector<std::unique_ptr<GesturesTimer>> mTimers;
struct Deadline {
Deadline(std::function<void(nsecs_t)> callback, int timerId)
: callback(callback), timerId(timerId) {}
const std::function<void(nsecs_t)> callback;
const int timerId;
};
std::multimap<nsecs_t /*time*/, Deadline> mDeadlines;
};
} // namespace android
// Represents a "timer" registered by the gestures library. In practice, this just means a set of
// deadlines that can be cancelled as a group. The library's API requires this to be in the
// top-level namespace.
struct GesturesTimer {
int id = -1;
};
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