Initial revision

src/libdraw/x11-event.c

@@ -0,0 +1,136 @@
+#include "x11-inc.h"
+
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+#include <event.h>
+
+#include <memdraw.h>
+#include "x11-memdraw.h"
+
+ulong
+event(Event *e)
+{
+	return eread(~0UL, e);
+}
+
+ulong
+eread(ulong keys, Event *e)
+{
+	ulong xmask;
+	XEvent xevent;
+
+	xmask = ExposureMask;
+
+	if(keys&Emouse)
+		xmask |= MouseMask|StructureNotifyMask;
+	if(keys&Ekeyboard)
+		xmask |= KeyPressMask;
+
+	XSelectInput(_x.display, _x.drawable, xmask);
+again:
+	XWindowEvent(_x.display, _x.drawable, xmask, &xevent);
+
+	switch(xevent.type){
+	case Expose:
+		xexpose(&xevent, _x.display);
+		goto again;
+	case ConfigureNotify:
+		if(xconfigure(&xevent, _x.display))
+			eresized(1);
+		goto again;
+	case ButtonPress:
+	case ButtonRelease:
+	case MotionNotify:
+		if(xtoplan9mouse(&xevent, &e->mouse) < 0)
+			goto again;
+		return Emouse;
+	case KeyPress:
+		e->kbdc = xtoplan9kbd(&xevent);
+		if(e->kbdc == -1)
+			goto again;
+		return Ekeyboard;
+	default:
+		return 0;
+	}
+}
+
+void
+einit(ulong keys)
+{
+	keys &= ~(Emouse|Ekeyboard);
+	if(keys){
+		fprint(2, "unknown keys in einit\n");
+		abort();
+	}
+}
+
+int
+ekbd(void)
+{
+	Event e;
+
+	eread(Ekeyboard, &e);
+	return e.kbdc;
+}
+
+Mouse
+emouse(void)
+{
+	Event e;
+
+	eread(Emouse, &e);
+	return e.mouse;
+}
+
+int
+ecanread(ulong keys)
+{
+	int can;
+
+	can = 0;
+	if(keys&Emouse)
+		can |= ecanmouse();
+	if(keys&Ekeyboard)
+		can |= ecankbd();
+	return can;
+}
+
+int
+ecanmouse(void)
+{
+	XEvent xe;
+	Mouse m;
+
+again:
+	if(XCheckWindowEvent(_x.display, _x.drawable, MouseMask, &xe)){
+		if(xtoplan9mouse(&xe, &m) < 0)
+			goto again;
+		XPutBackEvent(_x.display, &xe);
+		return 1;
+	}
+	return 0;
+}
+
+int
+ecankbd(void)
+{
+	XEvent xe;
+
+again:
+	if(XCheckWindowEvent(_x.display, _x.drawable, KeyPressMask, &xe)){
+		if(xtoplan9kbd(&xe) == -1)
+			goto again;
+		XPutBackEvent(_x.display, &xe);
+		return 1;
+	}
+	return 0;
+}
+
+void
+emoveto(Point p)
+{
+	xmoveto(p);
+}
+