private static string GetCommandString(Shell32.IContextMenu cMenu, uint offset, Shell32.GCS flags = Shell32.GCS.GCS_VERBW)
{
if (offset > 5000)
{
// Hackish workaround to avoid an AccessViolationException on some items,
// notably the "Run with graphic processor" menu item of NVidia cards
return(null);
}
SafeCoTaskMemString commandString = null;
try
{
commandString = new SafeCoTaskMemString(512);
cMenu.GetCommandString(new IntPtr(offset), flags, IntPtr.Zero, commandString, (uint)commandString.Capacity - 1);
Debug.WriteLine("Verb {0}: {1}", offset, commandString);
return(commandString.ToString());
}
catch (Exception ex) when(ex is InvalidCastException || ex is ArgumentException)
{
// TODO: investigate this..
Debug.WriteLine(ex);
return(null);
}
catch (Exception ex) when(ex is COMException || ex is NotImplementedException)
{
// Not every item has an associated verb
return(null);
}
finally
{
commandString?.Dispose();
}
}
private static string GetCommandString(Shell32.IContextMenu cMenu, uint offset, Shell32.GCS flags = Shell32.GCS.GCS_VERBW)
{
SafeCoTaskMemString commandString = null;
try
{
commandString = new SafeCoTaskMemString(512);
cMenu.GetCommandString(new IntPtr(offset), flags, IntPtr.Zero, commandString, (uint)commandString.Capacity - 1);
Debug.WriteLine("Verb {0}: {1}", offset, commandString);
return(commandString.ToString());
}
catch (Exception ex) when(ex is InvalidCastException || ex is ArgumentException)
{
// TODO: investigate this..
Debug.WriteLine(ex);
return(null);
}
catch (Exception ex) when(ex is COMException || ex is NotImplementedException)
{
// Not every item has an associated verb
return(null);
}
finally
{
commandString?.Dispose();
}
}
public void SafeResourceIdTest3()
{
const string s = "Test";
var sptr = new SafeCoTaskMemString(s);
var r = new SafeResourceId((IntPtr)sptr);
sptr.Dispose();
Assert.That(r.IsInvalid, Is.False);
Assert.That(r.ToString(), Is.EqualTo(s));
Assert.That((string)r, Is.EqualTo(s));
Assert.That((int)r, Is.EqualTo(0));
const int i = 5;
r = (IntPtr)i;
Assert.That(r.Equals((IntPtr)i));
Assert.That(r.IsInvalid, Is.False);
Assert.That(r.ToString(), Does.StartWith("#"));
Assert.That((string)r, Does.StartWith("#"));
Assert.That((int)r, Is.EqualTo(i));
Assert.That(((IntPtr)r).ToInt32(), Is.EqualTo(i));
}
private static void EnumMenuItems(
Shell32.IContextMenu cMenu,
HMENU hMenu,
List <Win32ContextMenuItem> menuItemsResult,
Func <string, bool> itemFilter = null)
{
var itemCount = User32.GetMenuItemCount(hMenu);
var mii = new User32.MENUITEMINFO();
mii.cbSize = (uint)Marshal.SizeOf(mii);
mii.fMask = User32.MenuItemInfoMask.MIIM_BITMAP
| User32.MenuItemInfoMask.MIIM_FTYPE
| User32.MenuItemInfoMask.MIIM_STRING
| User32.MenuItemInfoMask.MIIM_ID
| User32.MenuItemInfoMask.MIIM_SUBMENU;
for (uint ii = 0; ii < itemCount; ii++)
{
var menuItem = new ContextMenuItem();
var container = new SafeCoTaskMemString(512);
mii.dwTypeData = (IntPtr)container;
mii.cch = (uint)container.Capacity - 1; // https://devblogs.microsoft.com/oldnewthing/20040928-00/?p=37723
var retval = User32.GetMenuItemInfo(hMenu, ii, true, ref mii);
if (!retval)
{
container.Dispose();
continue;
}
menuItem.Type = (MenuItemType)mii.fType;
menuItem.ID = (int)(mii.wID - 1); // wID - idCmdFirst
if (menuItem.Type == MenuItemType.MFT_STRING)
{
Debug.WriteLine("Item {0} ({1}): {2}", ii, mii.wID, mii.dwTypeData);
menuItem.Label = mii.dwTypeData;
menuItem.CommandString = GetCommandString(cMenu, mii.wID - 1);
if (itemFilter != null && (itemFilter(menuItem.CommandString) || itemFilter(menuItem.Label)))
{
// Skip items implemented in UWP
container.Dispose();
continue;
}
if (mii.hbmpItem != HBITMAP.NULL && !Enum.IsDefined(typeof(HBITMAP_HMENU), ((IntPtr)mii.hbmpItem).ToInt64()))
{
var bitmap = GetBitmapFromHBitmap(mii.hbmpItem);
if (bitmap != null)
{
menuItem.Icon = bitmap;
}
}
if (mii.hSubMenu != HMENU.NULL)
{
Debug.WriteLine("Item {0}: has submenu", ii);
var subItems = new List <Win32ContextMenuItem>();
try
{
(cMenu as Shell32.IContextMenu2)?.HandleMenuMsg((uint)User32.WindowMessage.WM_INITMENUPOPUP, (IntPtr)mii.hSubMenu, new IntPtr(ii));
}
catch (NotImplementedException)
{
// Only for dynamic/owner drawn? (open with, etc)
}
EnumMenuItems(cMenu, mii.hSubMenu, subItems, itemFilter);
menuItem.SubItems = subItems;
Debug.WriteLine("Item {0}: done submenu", ii);
}
}
else
{
Debug.WriteLine("Item {0}: {1}", ii, mii.fType.ToString());
}
container.Dispose();
menuItemsResult.Add(menuItem);
}
}
