/
VolumeWatcher.cs
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/
VolumeWatcher.cs
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using System;
using System.IO;
using System.Collections.Generic;
#if PLATFORM_WINDOWS
using System.Windows.Forms;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
using Dolinay; // DriveDetector
#elif PLATFORM_MACOSX
using MonoMac;
using MonoMac.Foundation;
using MonoMac.AppKit;
using MonoMac.ObjCRuntime;
#endif
namespace VimFastFind
{
public enum VolumeWatcherEvent
{
DidMount,
WillUnmount,
DidUnmount
}
// volume will resemble "C:" on windows and "/" or "/Volumes/xxx" on mac
public delegate void VolumeWatcherEventDelegate(VolumeWatcher sender, VolumeWatcherEvent evt, string volume);
// on mac, VolumeWatcher uses NSWorkspace notifications: to get notifications,
// your application's main thread must be in a CoreFoundation run loop.
//
public class VolumeWatcher : IDisposable
{
#if PLATFORM_MACOSX
#pragma warning disable 0414
VolumeWatcherHelper _helper;
#pragma warning restore 0414
#elif PLATFORM_WINDOWS
DriveDetector _detector;
string _hookeddrive;
#endif
public event VolumeWatcherEventDelegate VolumeChanged;
public VolumeWatcher()
{
#if PLATFORM_MACOSX
_helper = new VolumeWatcherHelper(this);
#elif PLATFORM_WINDOWS
_detector = new DriveDetector();
_detector.DeviceArrived += delegate(object sender, DriveDetectorEventArgs e) {
if (e.Drive == _hookeddrive) e.HookQueryRemove = true;
ev_VolumeChanged(VolumeWatcherEvent.DidMount, e.Drive);
};
_detector.DeviceRemoved += delegate(object sender, DriveDetectorEventArgs e) {
ev_VolumeChanged(VolumeWatcherEvent.DidUnmount, e.Drive);
};
_detector.QueryRemove += delegate(object sender, DriveDetectorEventArgs e) {
// QueryRemove only gets fired if the device is "hooked" (see
// DriveDetector for explanation) and only one drive can be hooked
// at a time. may need to fix if this event is needed.
ev_VolumeChanged(VolumeWatcherEvent.WillUnmount, e.Drive);
};
#else
throw new NotSupportedException();
#endif
}
// returns the list of connected volumes.
public static IList<string> ScanVolumes()
{
#if PLATFORM_MACOSX
var list = new List<string>();
using (NSAutoreleasePool pool = new NSAutoreleasePool())
{
foreach (string path in NSWorkspace.SharedWorkspace.MountedLocalVolumePaths)
list.Add(path);
}
return list;
#elif PLATFORM_WINDOWS
var list = new List<string>();
foreach (DriveInfo drive in DriveInfo.GetDrives())
list.Add(drive.RootDirectory.FullName);
return list;
#else
throw new NotSupportedException();
#endif
}
void ev_VolumeChanged(VolumeWatcherEvent evt, string volume)
{
Trace("ev_VolumeChanged " + evt + ": " + volume);
if (VolumeChanged != null)
VolumeChanged(this, evt, volume);
}
void Trace(string s)
{
// Console.WriteLine(s);
}
public void Dispose()
{
#if PLATFORM_MACOSX
_helper.Dispose();
#elif PLATFORM_WINDOWS
_detector.Dispose();
#else
throw new NotSupportedException();
#endif
}
#if PLATFORM_MACOSX
[Register]
public class VolumeWatcherHelper : NSObject
{
VolumeWatcher outer;
object _disposelock = new object();
bool _disposed;
public VolumeWatcherHelper(VolumeWatcher vw)
{
outer = vw;
OSXUtils.ApplicationHelper.ExecuteWhenLaunched(delegate
{
using (NSAutoreleasePool pool = new NSAutoreleasePool ())
{
NSNotificationCenter nc = NSWorkspace.SharedWorkspace.NotificationCenter;
nc.AddObserver(this, new Selector("ev_VolumeDidMount:"), new NSString("NSWorkspaceDidMountNotification"), null);
nc.AddObserver(this, new Selector("ev_VolumeDidUnmount:"), new NSString("NSWorkspaceDidUnmountNotification"), null);
nc.AddObserver(this, new Selector("ev_VolumeWillUnmount:"), new NSString("NSWorkspaceWillUnmountNotification"), null);
}
});
}
protected override void Dispose(bool disposing)
{
if (_disposed) return;
lock (_disposelock)
{
if (_disposed) return;
OSXUtils.ApplicationHelper.ExecuteWhenLaunched(delegate
{
using (NSAutoreleasePool pool = new NSAutoreleasePool ())
NSWorkspace.SharedWorkspace.NotificationCenter.RemoveObserver (this);
});
_disposed = true;
}
base.Dispose(disposing);
}
[Export("ev_VolumeDidMount:")]
public void ev_VolumeDidMount(NSNotification n)
{
using (NSAutoreleasePool pool = new NSAutoreleasePool())
{
string mntpt = (NSString)n.UserInfo.ObjectForKey(new NSString("NSDevicePath"));
outer.ev_VolumeChanged(VolumeWatcherEvent.DidMount, mntpt);
}
}
[Export("ev_VolumeWillUnmount:")]
public void ev_VolumeWillUnmount(NSNotification n)
{
using (NSAutoreleasePool pool = new NSAutoreleasePool())
{
string mntpt = (NSString)n.UserInfo.ObjectForKey(new NSString("NSDevicePath"));
outer.ev_VolumeChanged(VolumeWatcherEvent.WillUnmount, mntpt);
}
}
[Export("ev_VolumeDidUnmount:")]
public void ev_VolumeDidUnmount(NSNotification n)
{
using (NSAutoreleasePool pool = new NSAutoreleasePool())
{
string mntpt = (NSString)n.UserInfo.ObjectForKey(new NSString("NSDevicePath"));
outer.ev_VolumeChanged(VolumeWatcherEvent.DidUnmount, mntpt);
}
}
}
#elif PLATFORM_WINDOWS
public string DriveToWatchForRemoval
{
get
{
return _hookeddrive;
}
set
{
_hookeddrive = value;
_detector.EnableQueryRemove(value);
}
}
#endif
}
}