Initial revision

src/libdraw/x11-mouse.c

@@ -0,0 +1,107 @@
+#include "x11-inc.h"
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <thread.h>
+#include <cursor.h>
+#include <mouse.h>
+#include <memdraw.h>
+#include "x11-memdraw.h"
+
+void
+moveto(Mousectl *m, Point pt)
+{
+	xmoveto(pt);
+}
+
+void
+closemouse(Mousectl *mc)
+{
+	if(mc == nil)
+		return;
+
+/*	postnote(PNPROC, mc->pid, "kill");
+*/
+	do; while(nbrecv(mc->c, &mc->m) > 0);
+	close(mc->mfd);
+	close(mc->cfd);
+	free(mc->file);
+	chanfree(mc->c);
+	chanfree(mc->resizec);
+	free(mc);
+}
+
+int
+readmouse(Mousectl *mc)
+{
+	if(mc->display)
+		flushimage(mc->display, 1);
+	if(recv(mc->c, &mc->m) < 0){
+		fprint(2, "readmouse: %r\n");
+		return -1;
+	}
+	return 0;
+}
+
+static
+void
+_ioproc(void *arg)
+{
+	int one;
+	Mouse m;
+	Mousectl *mc;
+	XEvent xevent;
+
+	one = 1;
+	mc = arg;
+	threadsetname("mouseproc");
+	memset(&m, 0, sizeof m);
+	mc->pid = getpid();
+	for(;;){
+		XSelectInput(_x.mousecon, _x.drawable, MouseMask|ExposureMask|StructureNotifyMask);
+		XWindowEvent(_x.mousecon, _x.drawable, MouseMask|ExposureMask|StructureNotifyMask, &xevent);
+		switch(xevent.type){
+		case Expose:
+			xexpose(&xevent, _x.mousecon);
+			continue;
+		case ConfigureNotify:
+			if(xconfigure(&xevent, _x.mousecon))
+				nbsend(mc->resizec, &one);
+			continue;
+		case ButtonPress:
+		case ButtonRelease:
+		case MotionNotify:
+			if(xtoplan9mouse(&xevent, &m) < 0)
+				continue;
+			send(mc->c, &m);
+			/*
+			 * mc->Mouse is updated after send so it doesn't have wrong value if we block during send.
+			 * This means that programs should receive into mc->Mouse (see readmouse() above) if
+			 * they want full synchrony.
+			 */
+			mc->m = m;
+			break;
+		}
+	}
+}
+
+Mousectl*
+initmouse(char *file, Image *i)
+{
+	Mousectl *mc;
+
+	mc = mallocz(sizeof(Mousectl), 1);
+	if(i)
+		mc->display = i->display;
+	mc->c = chancreate(sizeof(Mouse), 0);
+	mc->resizec = chancreate(sizeof(int), 2);
+	proccreate(_ioproc, mc, 16384);
+	return mc;
+}
+
+void
+setcursor(Mousectl *mc, Cursor *c)
+{
+	xsetcursor(c);
+}
+