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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_LINUX_X11_CHARACTER_INJECTOR_H_
#define REMOTING_HOST_LINUX_X11_CHARACTER_INJECTOR_H_
#include <stdint.h>
#include "base/containers/queue.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/timer/timer.h"
namespace remoting {
class X11Keyboard;
// This is a helper class for injecting unicode characters to XWindow server.
// Characters will be queued up and sent when there is available resource.
class X11CharacterInjector {
public:
explicit X11CharacterInjector(std::unique_ptr<X11Keyboard> keyboard);
X11CharacterInjector(const X11CharacterInjector&) = delete;
X11CharacterInjector& operator=(const X11CharacterInjector&) = delete;
~X11CharacterInjector();
void Inject(uint32_t code_point);
private:
struct KeyInfo;
struct MapResult;
// Schedules a task to call DoInject after |delay| if no such task has been
// scheduled.
void Schedule(base::TimeDelta delay);
void DoInject();
// |code_point|: The Unicode code point for the character.
// If the returned result indicates success, caller can use the returned
// keycode and modifiers to simulate a key press that can generate the
// character.
//
// Note that the returned result will expire after some amount of time so do
// not store the result for later use.
MapResult MapCharacter(uint32_t code_point);
// Resets the expiration time of the KeyInfo in available_keycodes_[index]
// to now + the expire duration constant.
void ResetKeyInfoExpirationTime(base::TimeTicks now,
std::vector<KeyInfo>::iterator position);
std::unique_ptr<X11Keyboard> keyboard_;
base::queue<uint32_t> characters_queue_;
base::OneShotTimer injection_timer_;
// Sorted by ascending expiration time.
std::vector<KeyInfo> available_keycodes_;
base::ThreadChecker thread_checker_;
};
} // namespace remoting
#endif // REMOTING_HOST_LINUX_X11_CHARACTER_INJECTOR_H_
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