public LinuxX11WindowImpl(LinuxX11Platform platform,
int width,
int height)
{
_platform = platform;
X11.XSetWindowAttributes attributes = new X11.XSetWindowAttributes();
var screen = Xlib.XDefaultScreen(_platform.Display);
_visual = Xlib.XDefaultVisual(_platform.Display, screen);
var depth = Xlib.XDefaultDepth(_platform.Display, screen);
attributes.background_pixel = 0;
attributes.bit_gravity = 10;
_window = Xlib.XCreateWindow(platform.Display,
Xlib.XDefaultRootWindow(platform.Display),
300,
300,
(uint)width,
(uint)height,
1,
depth,
1,
_visual,
1 << 1 | 1 << 4,
ref attributes);
Xlib.XSelectInput(platform.Display, _window, X11.EventMask.ExposureMask |
X11.EventMask.StructureNotifyMask |
X11.EventMask.EnterWindowMask |
X11.EventMask.LeaveWindowMask |
X11.EventMask.PointerMotionMask);
}
private void XSetWMProtocols(LinuxX11WindowImpl window)
{
GCHandle valueHandle = default;
try
{
var atom = (ulong)WM_DELETE_PROTOCOL;
valueHandle = GCHandle.Alloc(atom, GCHandleType.Pinned);
int res = Xlib.XChangeProperty(Display,
window.XWindow,
property: WM_PROTOCOL,
type: X11.Atom.Atom,
format: 32, //bits,
(int)X11.PropertyMode.Replace,
data: valueHandle.AddrOfPinnedObject(),
nelements: 1 /*count*/);
}
finally
{
if (valueHandle.IsAllocated)
{
valueHandle.Free();
}
}
}
public void Dispose()
{
_cairoSurface.Dispose();
Xlib.XUnmapWindow(_platform.Display, _window);
Xlib.XDestroyWindow(_platform.Display, _window);
}
public void UpdateBackground(IBrush brush)
{
if (brush is not SolidColorBrush solidColor)
{
return;
}
X11.XColor color = new X11.XColor();
var colormap = Xlib.XDefaultColormap(_platform.Display,
Xlib.XDefaultScreen(_platform.Display));
var status = Xlib.XParseColor(_platform.Display,
colormap,
$"RGBi:{solidColor.Red}/{solidColor.Green}/{solidColor.Blue}",
ref color);
//Not sure if XLib.XFreeColors should be called here.
//The API is different and XColor is allocated by the .Net
//It is probably should be called to remove Colormap entry
status = Xlib.XAllocColor(_platform.Display, colormap, ref color);
Xlib.XSetWindowBackground(_platform.Display,
XWindow,
color.pixel);
}
private void WaitForEvent(Dispatcher d, IntPtr ev)
{
Services.Logger.LogWindowingSystemEvent("Waiting for X11 events...");
Xlib.XNextEvent(Display, ev);
var xevent = Marshal.PtrToStructure <X11.XAnyEvent>(ev);
HandleEvent(xevent, ev, d);
}
public LinuxX11Platform()
{
Display = Xlib.XOpenDisplay(null);
//Xlib.XSetErrorHandler(OnError);
Dispatcher.CurrentDispatcher.Initialize(ListenToEvents,
WakeUp);
_deleteProtocolAtomProvider =
new Lazy <X11.Atom>(() => XInternAtom(Display, "WM_DELETE_WINDOW", false));
}
public void Resize(int width, int height)
{
var conf = new X11.XWindowChanges()
{
width = width,
height = height
};
Xlib.XConfigureWindow(_platform.Display,
_window,
1 << 2 | 1 << 3,
ref conf);
}
private int OnError(IntPtr display, ref X11.XErrorEvent ev)
{
int size = 256;
var mem = Marshal.AllocHGlobal(sizeof(char) * size);
var status = Xlib.XGetErrorText(display,
ev.error_code,
mem,
size);
string msg = Marshal.PtrToStringAuto(mem);
return(0);
}
private void HandleEvent(X11.XAnyEvent xevent, IntPtr ev, Dispatcher d)
{
Services.Logger.LogWindowingSystemEvent("Processing event {0}...", xevent.type);
switch (xevent.type)
{
case (int)X11.Event.Expose:
var exposeEvent = Marshal.PtrToStructure <X11.XExposeEvent>(ev);
HandleExposeEvent(exposeEvent, d);
break;
case (int)X11.Event.ResizeRequest:
while (Xlib.XCheckMaskEvent(Display, X11.EventMask.ResizeRedirectMask, ev))
{
}
var resizeEvent = Marshal.PtrToStructure <X11.XResizeRequestEvent>(ev);
HandleResizeEvent(resizeEvent, d);
break;
case (int)X11.Event.ConfigureNotify:
var configuraEvent = Marshal.PtrToStructure <X11.XConfigureRequestEvent>(ev);
HandleConfigureEvent(configuraEvent, d);
break;
case (int)X11.Event.DestroyNotify:
var destroyEvent = Marshal.PtrToStructure <X11.XDestroyWindowEvent>(ev);
HandleDestroyEvent(destroyEvent, d);
break;
case (int)X11.Event.ClientMessage:
var clientMessage = Marshal.PtrToStructure <X11.XClientMessageEvent>(ev);
HandleClientMessage(clientMessage, d);
break;
case (int)X11.Event.EnterNotify:
case (int)X11.Event.LeaveNotify:
var crossingEvent = Marshal.PtrToStructure <X11.XCrossingEvent>(ev);
HandleCrossingEvent(crossingEvent, d);
break;
case (int)X11.Event.MotionNotify:
var motionEvent = Marshal.PtrToStructure <X11.XMotionEvent>(ev);
HandleMoveEvent(motionEvent, d);
break;
}
}
public void ListenToEvents()
{
var d = Dispatcher.CurrentDispatcher;
IntPtr ev = Marshal.AllocHGlobal(24 * sizeof(long));
try
{
WaitForEvent(d, ev);
while (Xlib.XPending(Display) > 0)
{
WaitForEvent(d, ev);
}
}
finally
{
Marshal.FreeHGlobal(ev);
}
}
private void WakeUp()
{
Services.Logger.LogWindowingSystemEvent("Received wake up call.");
if (!_windows.Any())
{
Services.Logger.LogWindowingSystemEvent("No windows to wake. Request skipped.");
return;
}
var connection = Xlib.XOpenDisplay(null);
IntPtr ev = Marshal.AllocHGlobal(24 * sizeof(long));
try
{
var msg = new X11.XClientMessageEvent()
{
message_type = X11.Atom.None,
window = _windows[0].XWindow,
display = connection,
type = (int)X11.Event.ClientMessage,
format = 32
};
Marshal.StructureToPtr(msg, ev, false);
X11.Status status = Xlib.XSendEvent(connection, _windows[0].XWindow, true, 0, ev);
Services.Logger.LogWindowingSystemEvent("Message to XOrg sent. Status - {0}", status);
}
finally
{
Marshal.FreeHGlobal(ev);
Xlib.XCloseDisplay(connection);
}
}
public void Dispose()
{
Services.Logger.LogWindowingSystemEvent("Disposing platform...");
Xlib.XCloseDisplay(Display);
}
public void Show()
{
Xlib.XMapWindow(_platform.Display, _window);
}