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// Copyright (c) 2012 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 CHROME_BROWSER_SYSTEM_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
#define CHROME_BROWSER_SYSTEM_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/string16.h"
#include "base/system_monitor/system_monitor.h"
namespace chrome {
// This class watches the volume mount points and sends notifications to
// base::SystemMonitor about the device attach/detach events. This is a
// singleton class instantiated by RemovableDeviceNotificationsWindowWin.
class VolumeMountWatcherWin
: public base::RefCountedThreadSafe<VolumeMountWatcherWin> {
public:
VolumeMountWatcherWin();
// Must be called after the file thread is created.
void Init();
// Gets the information about the device mounted at |device_path|. On success,
// returns true and fills in |location|, |unique_id|, |name| and |removable|.
virtual bool GetDeviceInfo(const FilePath& device_path,
string16* location,
std::string* unique_id,
string16* name,
bool* removable);
// Processes DEV_BROADCAST_VOLUME messages and triggers a SystemMonitor
// notification if appropriate.
void OnWindowMessage(UINT event_type, LPARAM data);
protected:
// VolumeMountWatcherWin is ref-counted.
virtual ~VolumeMountWatcherWin();
// Returns a vector of all the removable mass storage devices that are
// connected.
virtual std::vector<FilePath> GetAttachedDevices();
private:
friend class base::RefCountedThreadSafe<VolumeMountWatcherWin>;
// Key: Mass storage device mount point.
// Value: Mass storage device ID string.
typedef std::map<string16, std::string> MountPointDeviceIdMap;
// Adds a new mass storage device specified by |device_path|.
void AddNewDevice(const FilePath& device_path);
// Enumerate and add existing mass storage devices on file thread.
void AddExistingDevicesOnFileThread();
// Identifies the device type and handles the device attach event.
void CheckDeviceTypeOnFileThread(const std::string& unique_id,
const string16& device_name,
const FilePath& device);
// Handles mass storage device attach event on UI thread.
void HandleDeviceAttachEventOnUIThread(const std::string& device_id,
const string16& device_name,
const string16& device_location);
// Handles mass storage device detach event on UI thread.
void HandleDeviceDetachEventOnUIThread(const string16& device_location);
// A map from device mount point to device id. Only accessed on the UI
// thread.
MountPointDeviceIdMap device_ids_;
DISALLOW_COPY_AND_ASSIGN(VolumeMountWatcherWin);
};
} // namespace chrome
#endif // CHROME_BROWSER_SYSTEM_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
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