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// Copyright (c) 2011 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.
#ifndef BASE_EVENT_RECORDER_H_
#define BASE_EVENT_RECORDER_H_
#pragma once
#include "base/base_api.h"
#include "base/basictypes.h"
#include "build/build_config.h"
#if defined(OS_WIN)
#include <stdio.h>
#include <string.h>
#include <windows.h>
#endif
class FilePath;
namespace base {
// A class for recording and playing back keyboard and mouse input events.
//
// Note - if you record events, and the playback with the windows in
// different sizes or positions, the playback will fail. When
// recording and playing, you should move the relevant windows
// to constant sizes and locations.
// TODO(mbelshe) For now this is a singleton. I believe that this class
// could be easily modified to:
// support two simultaneous recorders
// be playing back events while already recording events.
// Why? Imagine if the product had a "record a macro" feature.
// You might be recording globally, while recording or playing back
// a macro. I don't think two playbacks make sense.
class BASE_API EventRecorder {
public:
// Get the singleton EventRecorder.
// We can only handle one recorder/player at a time.
static EventRecorder* current() {
if (!current_)
current_ = new EventRecorder();
return current_;
}
// Starts recording events.
// Will clobber the file if it already exists.
// Returns true on success, or false if an error occurred.
bool StartRecording(const FilePath& filename);
// Stops recording.
void StopRecording();
// Is the EventRecorder currently recording.
bool is_recording() const { return is_recording_; }
// Plays events previously recorded.
// Returns true on success, or false if an error occurred.
bool StartPlayback(const FilePath& filename);
// Stops playback.
void StopPlayback();
// Is the EventRecorder currently playing.
bool is_playing() const { return is_playing_; }
#if defined(OS_WIN)
// C-style callbacks for the EventRecorder.
// Used for internal purposes only.
LRESULT RecordWndProc(int nCode, WPARAM wParam, LPARAM lParam);
LRESULT PlaybackWndProc(int nCode, WPARAM wParam, LPARAM lParam);
#endif
private:
// Create a new EventRecorder. Events are saved to the file filename.
// If the file already exists, it will be deleted before recording
// starts.
explicit EventRecorder()
: is_recording_(false),
is_playing_(false),
#if defined(OS_WIN)
journal_hook_(NULL),
file_(NULL),
#endif
playback_first_msg_time_(0),
playback_start_time_(0) {
#if defined(OS_WIN)
memset(&playback_msg_, 0, sizeof(playback_msg_));
#endif
}
~EventRecorder();
static EventRecorder* current_; // Our singleton.
bool is_recording_;
bool is_playing_;
#if defined(OS_WIN)
HHOOK journal_hook_;
FILE* file_;
EVENTMSG playback_msg_;
#endif
int playback_first_msg_time_;
int playback_start_time_;
DISALLOW_COPY_AND_ASSIGN(EventRecorder);
};
} // namespace base
#endif // BASE_EVENT_RECORDER_H_
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