Extensions to NSApplication for hiding Dock icon and relaunching.

NSApplicationExtensions.cs

using System;
using System.IO;
using System.Diagnostics;

using MonoMac.AppKit;
using MonoMac.Foundation;

namespace Awareness
{
  public static class NSApplicationExtensions
  {
    public static bool IsShownInDock (this NSApplication self)
    {
      var path = Path.Combine (NSBundle.MainBundle.BundlePath, "Contents/Info.plist");
      var plist = NSMutableDictionary.FromFile (path);
      var uie = plist[(NSString) "LSUIElement"] as NSNumber;
      return uie == null ? true : !uie.BoolValue;
    }
    
    public static void SetIsShownInDock (this NSApplication self, bool visible = true, bool relaunch = false)
    {
      if (visible == self.IsShownInDock ()) return;
      
      var path = Path.Combine (NSBundle.MainBundle.BundlePath, "Contents/Info.plist");
      var plist = NSMutableDictionary.FromFile (path);
      plist[(NSString) "LSUIElement"] = NSNumber.FromBoolean (!visible);
      
      if (plist.WriteToFile (path, true)) {
        Process.Start ("/usr/bin/touch", string.Format ("-fmac \"{0}\"", path));
        if (relaunch) self.Relaunch ();
      }
    }
    
    public static void Relaunch (this NSApplication self)
    {
      var pid = NSProcessInfo.ProcessInfo.ProcessIdentifier;
      var script = string.Format (@"
        while [ `ps -p {0} | wc -l` -gt 1 ]; do sleep 0.1; done; open '{1}'
      ", pid, NSBundle.MainBundle.BundlePath);
      NSTask.LaunchFromPath ("/bin/sh", new [] { "-c", script });
      self.Terminate (self);
    }
  }
}