// Gets whether the menu item at the specified index is included
// in the context menu
private bool Included(ShellMenuItem item)
{
if (bDefaultOnly)
{
return(ItemIsDefault(item));
}
return(true);
}
// Gets whether the item at the specified index is the default
// item; the default item can change between the 'Explore' and 'Open'
// menu items depending on whether the shell set the Explore context
// menu option
private bool ItemIsDefault(ShellMenuItem item)
{
if (!bExplore && IsOpenItem(item))
{
return(true);
}
else if (bExplore && IsExploreItem(item))
{
return(true);
}
else if (
(!bExplore && !HasOpenItem) ||
(bExplore && !HasExploreItem))
{
return(item.Default);
}
else
{
return(false);
}
}
void IContextMenu.GetCommandString(int idCmd, CommandStringOptions uFlags, IntPtr pwReserved, byte[] pszName, uint cchMax)
{
if (idCmd > menuItems.Length - 1)
{
idCmd = 0;
//return;
}
ShellMenuItem menuItem = menuItems[idCmd];
string text;
switch (uFlags)
{
case CommandStringOptions.HelpTextA:
case CommandStringOptions.HelpTextW:
text = menuItem.HelpText;
break;
case CommandStringOptions.VerbA:
case CommandStringOptions.VerbW:
text = menuItem.Verb;
break;
case CommandStringOptions.ValidateA:
case CommandStringOptions.ValidateW:
if (idCmd < 0 || idCmd >= menuItems.Length)
{
Marshal.ThrowExceptionForHR(1); // S_FALSE
}
throw new Exception(); // unreachable
default:
throw new ArgumentOutOfRangeException("uFlags", uFlags.ToString());
}
if (text == null)
{
text = string.Empty;
}
byte[] buf;
if ((uFlags & CommandStringOptions.Unicode) == CommandStringOptions.Unicode)
{
buf = Encoding.Unicode.GetBytes(text);
}
else
{
buf = Encoding.ASCII.GetBytes(text);
}
int cch = Math.Min(buf.Length, pszName.Length - 1);
if (cch > 0)
{
Array.Copy(buf, 0, pszName, 0, cch);
}
else
{
// null terminate the buffer
pszName[0] = 0;
}
}
private bool IsNewFolderItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.NewFolderVerb);
}
// Gets whether the specified menu item is the 'open' menu item
private bool IsDeleteItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.DeleteVerb);
}
// Gets whether the specified menu item is the 'open' menu item
private bool IsCopyItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.CopyVerb);
}
private bool IsRenameItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.RenameVerb);
}
// Gets whether the specified menu item is the 'open' menu item
private bool IsOpenItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.OpenVerb);
}
// Gets whether the specified menu item is the 'explore' menu item
private bool IsExploreItem(ShellMenuItem item)
{
return(item.Verb == ExploreMenuItem.ExploreVerb);
}
