public static extern int poll( pollfd[] fds, int fdsCount, int timeout);
private void runLinux(Control control)
{
this.mainControl = control;
if ( userCanvasSize.IsEmpty ) {
// Create physical canvas with actual terminal size
winsize ws = Libc.GetTerminalSize( isDarwin );
canvas = new PhysicalCanvas( ws.ws_col, ws.ws_row );
} else {
canvas = new PhysicalCanvas( userCanvasSize.Width, userCanvasSize.Height );
}
renderer.Canvas = canvas;
renderer.RootElementRect = userRootElementRect.IsEmpty
? new Rect( canvas.Size ) : userRootElementRect;
renderer.RootElement = mainControl;
//
mainControl.Invalidate ();
// Terminal initialization sequence
// This is magic workaround to avoid messing up terminal after program finish
// The bug is described at https://bugzilla.xamarin.com/show_bug.cgi?id=15118
bool ignored = Console.KeyAvailable;
IntPtr stdscr = NCurses.initscr ();
NCurses.cbreak ();
NCurses.noecho ();
NCurses.nonl ();
NCurses.intrflush (stdscr, false);
NCurses.keypad (stdscr, true);
NCurses.start_color ();
HideCursor ();
try {
renderer.UpdateLayout( );
renderer.FinallyApplyChangesToCanvas( );
termkeyHandle = LibTermKey.termkey_new( 0, TermKeyFlag.TERMKEY_FLAG_SPACESYMBOL );
// Setup the input mode
Console.Write( "\x1B[?1002h" );
pollfd fd = new pollfd( );
fd.fd = 0;
fd.events = POLL_EVENTS.POLLIN;
pollfd[ ] fds = new pollfd[ 2 ];
fds[ 0 ] = fd;
fds[ 1 ] = new pollfd( );
int pipeResult = Libc.pipe( pipeFds );
if ( pipeResult == -1 ) {
throw new InvalidOperationException( "Cannot create self-pipe." );
}
fds[ 1 ].fd = pipeFds[ 0 ];
fds[ 1 ].events = POLL_EVENTS.POLLIN;
try {
#if !WIN32
// Catch SIGWINCH to handle terminal resizing
UnixSignal[] signals = new UnixSignal [] {
new UnixSignal (Signum.SIGWINCH)
};
Thread signal_thread = new Thread (delegate () {
while (true) {
// Wait for a signal to be delivered
int index = UnixSignal.WaitAny (signals, -1);
Signum signal = signals [index].Signum;
Libc.writeInt64 (pipeFds[1], 2);
}
}
);
signal_thread.IsBackground = false;
signal_thread.Start ();
#endif
TermKeyKey key = new TermKeyKey( );
//
this.running = true;
this.mainThreadId = Thread.CurrentThread.ManagedThreadId;
//
int nextwait = -1;
while ( true ) {
int pollRes = Libc.poll( fds, 2, nextwait );
if ( pollRes == 0 ) {
if (nextwait == -1)
throw new InvalidOperationException( "Assertion failed." );
if (TermKeyResult.TERMKEY_RES_KEY == LibTermKey.termkey_getkey_force(termkeyHandle, ref key) ) {
processLinuxInput( key );
}
}
if ( pollRes == -1 ) {
int errorCode = Marshal.GetLastWin32Error();
if ( errorCode != Libc.EINTR ) {
throw new InvalidOperationException(string.Format("poll() returned with error code {0}", errorCode));
}
}
if ( fds[ 1 ].revents != POLL_EVENTS.NONE ) {
UInt64 u;
Libc.readInt64( fds[ 1 ].fd, out u );
if ( u == 1 ) {
// Exit from application
#if !WIN32
signal_thread.Abort ();
#endif
break;
}
if ( u == 2 ) {
// Get new term size and process appropriate INPUT_RECORD event
INPUT_RECORD inputRecord = new INPUT_RECORD( );
inputRecord.EventType = EventType.WINDOW_BUFFER_SIZE_EVENT;
winsize ws = Libc.GetTerminalSize( isDarwin );
inputRecord.WindowBufferSizeEvent.dwSize.X = ( short ) ws.ws_col;
inputRecord.WindowBufferSizeEvent.dwSize.Y = ( short ) ws.ws_row;
processInputEvent( inputRecord );
}
if (u == 3 ) {
// It is signal from async actions invocation stuff
}
}
if ( ( fds[ 0 ].revents & POLL_EVENTS.POLLIN ) == POLL_EVENTS.POLLIN ||
( fds[ 0 ].revents & POLL_EVENTS.POLLHUP ) == POLL_EVENTS.POLLHUP ||
( fds[ 0 ].revents & POLL_EVENTS.POLLERR ) == POLL_EVENTS.POLLERR ) {
LibTermKey.termkey_advisereadable( termkeyHandle );
}
TermKeyResult result = ( LibTermKey.termkey_getkey( termkeyHandle, ref key ) );
while (result == TermKeyResult.TERMKEY_RES_KEY ) {
processLinuxInput( key );
result = ( LibTermKey.termkey_getkey( termkeyHandle, ref key ) );
}
if (result == TermKeyResult.TERMKEY_RES_AGAIN) {
nextwait = LibTermKey.termkey_get_waittime(termkeyHandle);
} else {
nextwait = -1;
}
while ( true ) {
bool anyInvokeActions = isAnyInvokeActions( );
bool anyRoutedEvent = !EventManager.IsQueueEmpty( );
bool anyLayoutToRevalidate = renderer.AnyControlInvalidated;
if (!anyInvokeActions && !anyRoutedEvent && !anyLayoutToRevalidate)
break;
EventManager.ProcessEvents();
processInvokeActions( );
renderer.UpdateLayout( );
}
renderer.FinallyApplyChangesToCanvas( );
}
} finally {
LibTermKey.termkey_destroy( termkeyHandle );
Libc.close( pipeFds[ 0 ] );
Libc.close( pipeFds[ 1 ] );
Console.Write( "\x1B[?1002l" );
}
} finally {
// Restore cursor visibility before exit
ShowCursor( );
NCurses.endwin( );
}
renderer.RootElement = null;
}