/// <summary>
/// Remove an active user.
/// </summary>
/// <param name="user">An active user.</param>
/// <exception cref="ArgumentNullException"><paramref name="user"/> is <c>null</c>.</exception>
/// <remarks>
/// Removing a user also unassigns all currently assigned devices from the user. On completion of this
/// method, <see cref="devices"/> of <paramref name="user"/> will be empty.
/// </remarks>
public static void Remove(IInputUser user)
{
if (user == null)
{
throw new ArgumentNullException("user");
}
var index = FindUserIndex(user);
if (index == -1)
{
return;
}
// Remove devices.
var userData = s_AllUserData[index];
if (userData.deviceCount > 0)
{
ArrayHelpers.EraseSliceWithCapacity(ref s_AllDevices, ref s_AllDeviceCount, userData.deviceStartIndex,
userData.deviceCount);
}
// Remove.
var userCount = s_AllUserCount;
ArrayHelpers.EraseAtWithCapacity(ref s_AllUsers, ref userCount, index);
ArrayHelpers.EraseAtWithCapacity(ref s_AllUserData, ref s_AllUserCount, index);
// Send notification.
Notify(user, InputUserChange.Removed);
}
private static void ClearAssignedInputDevicesInternal(int index)
{
var deviceCount = s_AllUserData[index].deviceCount;
if (deviceCount == 0)
{
return;
}
var deviceStartIndex = s_AllUserData[index].deviceStartIndex;
ArrayHelpers.EraseSliceWithCapacity(ref s_AllDevices, ref s_AllDeviceCount, deviceCount, deviceStartIndex);
s_AllUserData[index].deviceCount = 0;
s_AllUserData[index].deviceStartIndex = -1;
// Adjust indices of other users.
for (var i = 0; i < s_AllUserCount; ++i)
{
if (s_AllUserData[i].deviceStartIndex <= deviceStartIndex)
{
continue;
}
s_AllUserData[i].deviceStartIndex -= deviceCount;
}
}
