|
private CallNextHookEx ( HOOK hhk, HC nCode, WM wParam, |
||
| hhk | HOOK | |
| nCode | HC | |
| wParam | WM | |
| lParam | ||
| return | int | |
private static int OnKey(HC nCode, WM wParam, IntPtr lParam)
{
bool is_key = (wParam == WM.KEYDOWN || wParam == WM.SYSKEYDOWN ||
wParam == WM.KEYUP || wParam == WM.SYSKEYUP);
if (m_duplicate != 0)
{
// Do nothing. We can only get here if a key is pressed during
// the very short time where we have two hooks installed, i.e.
// practically never, but it’s better to handle this properly.
}
else if (nCode == HC.ACTION && is_key)
{
// Retrieve key event data from native structure
var data = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam,
typeof(KBDLLHOOKSTRUCT));
bool is_injected = (data.flags & LLKHF.INJECTED) != 0;
bool accept = !is_injected || (Settings.AllowInjected.Value && m_recursive == 0);
Logger.Debug("{0}{1}: OnKey(HC.{2}, WM.{3}, [vk:0x{4:X02} ({7}) sc:0x{5:X02} flags:{6}])",
accept ? "" : "Ignored ", is_injected ? "Injected Event" : "Event",
nCode, wParam, (int)data.vk, (int)data.sc, data.flags, new Key(data.vk));
if (accept)
{
++m_recursive;
bool processed = Composer.OnKey(wParam, data.vk, data.sc, data.flags);
--m_recursive;
if (processed)
{
return(-1); // Do not process further: that key was for us.
}
}
}
else
{
Logger.Debug("Ignored Event: OnKey({0}, {1})", nCode, wParam);
}
// Call next hook but guard against re-doing our own work in case we
// were installed twice.
++m_duplicate;
int ret = NativeMethods.CallNextHookEx(m_hook, nCode, wParam, lParam);
--m_duplicate;
return(ret);
}
private static int OnKey(HC nCode, WM wParam, IntPtr lParam)
{
if (nCode == HC.ACTION)
{
// Retrieve event data from native structure
var data = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam,
typeof(KBDLLHOOKSTRUCT));
bool is_key = (wParam == WM.KEYDOWN || wParam == WM.SYSKEYDOWN ||
wParam == WM.KEYUP || wParam == WM.SYSKEYUP);
bool is_injected = (data.flags & LLKHF.INJECTED) != 0;
if (is_key && !is_injected)
{
if (Composer.OnKey(wParam, data.vk, data.sc, data.flags))
{
// Do not process further: that key was for us.
return(-1);
}
}
}
return(NativeMethods.CallNextHookEx(m_hook, nCode, wParam, lParam));
}