warp: dragmfact + dragcfact compatibility

These set of changes introduce:
   a) a flag to ignore warp from happening while dragmfact or
      dragcfact is being used and
   b) a flag to force warp when killclient or showhideclient
      is used, to make for a more intuitive experience

ref. https://github.com/bakkeby/patches/issues/11

dwm.c

@@ -671,6 +671,10 @@ static int lrpad;            /* sum of left and right padding for text */
  * when moving (or resizing) client windows from one monitor to another. This variable is used
  * internally to ignore such configure requests while movemouse or resizemouse are being used. */
 static int ignoreconfigurerequests = 0;
+#if WARP_PATCH
+static int force_warp = 0; // force warp in some situations, e.g. killclient
+static int ignore_warp = 0; // force skip warp in some situations, e.g. dragmfact, dragcfact
+#endif // WARP_PATCH
 static int (*xerrorxlib)(Display *, XErrorEvent *);
 static unsigned int numlockmask = 0;
 static void (*handler[LASTEvent]) (XEvent *) = {
@@ -2112,10 +2116,11 @@ killclient(const Arg *arg)
 	#endif // ISPERMANENT_PATCH
 		return;
 	#if BAR_SYSTRAY_PATCH
-	if (!sendevent(selmon->sel->win, wmatom[WMDelete], NoEventMask, wmatom[WMDelete], CurrentTime, 0, 0, 0)) {
+	if (!sendevent(selmon->sel->win, wmatom[WMDelete], NoEventMask, wmatom[WMDelete], CurrentTime, 0, 0, 0))
 	#else
-	if (!sendevent(selmon->sel, wmatom[WMDelete])) {
+	if (!sendevent(selmon->sel, wmatom[WMDelete]))
 	#endif // BAR_SYSTRAY_PATCH
+	{
 		XGrabServer(dpy);
 		XSetErrorHandler(xerrordummy);
 		XSetCloseDownMode(dpy, DestroyAll);
@@ -2123,6 +2128,9 @@ killclient(const Arg *arg)
 		XSync(dpy, False);
 		XSetErrorHandler(xerror);
 		XUngrabServer(dpy);
+		#if WARP_PATCH
+		force_warp = 1;
+		#endif // WARP_PATCH
 	}
 	#if SWAPFOCUS_PATCH && PERTAG_PATCH
 	selmon->pertag->prevclient[selmon->pertag->curtag] = NULL;

patch/bar_wintitleactions.c

@@ -80,6 +80,9 @@ showhideclient(const Arg *arg)
 	if (!c)
 		return;
 
+	#if WARP_PATCH
+	force_warp = 1;
+	#endif // WARP_PATCH
 	if (HIDDEN(c)) {
 		show(c);
 		focus(c);

patch/dragcfact.c

@@ -27,6 +27,11 @@ dragcfact(const Arg *arg)
 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
 		None, cursor[CurIronCross]->cursor, CurrentTime) != GrabSuccess)
 		return;
+
+	#if WARP_PATCH
+	ignore_warp = 1;
+	#endif // WARP_PATCH
+
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w/2, c->h/2);
 
 	prev_x = prev_y = -999999;
@@ -66,6 +71,9 @@ dragcfact(const Arg *arg)
 		}
 	} while (ev.type != ButtonRelease);
 
+	#if WARP_PATCH
+	ignore_warp = 0;
+	#endif // WARP_PATCH
 
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w/2, c->h/2);
 

patch/dragmfact.c

@@ -152,6 +152,11 @@ dragmfact(const Arg *arg)
 	if (XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
 		None, cursor[horizontal ? CurResizeVertArrow : CurResizeHorzArrow]->cursor, CurrentTime) != GrabSuccess)
 		return;
+
+	#if WARP_PATCH
+	ignore_warp = 1;
+	#endif // WARP_PATCH
+
 	XWarpPointer(dpy, None, root, 0, 0, 0, 0, px, py);
 
 	do {
@@ -217,6 +222,10 @@ dragmfact(const Arg *arg)
 		}
 	} while (ev.type != ButtonRelease);
 
+	#if WARP_PATCH
+	ignore_warp = 0;
+	#endif // WARP_PATCH
+
 	XUngrabPointer(dpy, CurrentTime);
 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 }

patch/warp.c

@@ -5,26 +5,32 @@ warp(const Client *c)
 	Bar *bar;
 	int x, y;
 
+	if (ignore_warp)
+		return;
+
 	if (!c) {
 		XWarpPointer(dpy, None, root, 0, 0, 0, 0, selmon->wx + selmon->ww / 2, selmon->wy + selmon->wh / 2);
 		return;
 	}
 
-	if (!getrootptr(&x, &y) ||
-		(x > c->x - c->bw &&
-		 y > c->y - c->bw &&
-		 x < c->x + c->w + c->bw*2 &&
-		 y < c->y + c->h + c->bw*2)
-	)
-		return;
+	if (!force_warp) {
+		if (!getrootptr(&x, &y) ||
+			(x > c->x - c->bw &&
+			 y > c->y - c->bw &&
+			 x < c->x + c->w + c->bw*2 &&
+			 y < c->y + c->h + c->bw*2)
+		)
+			return;
 
-	for (m = mons; m; m = m->next)
-		for (bar = m->bar; bar; bar = bar->next)
-			if (x > bar->bx &&
-				x < bar->bx + bar->bw &&
-				y > bar->by &&
-				y < bar->by + bar->bh)
-				return;
+		for (m = mons; m; m = m->next)
+			for (bar = m->bar; bar; bar = bar->next)
+				if (x > bar->bx &&
+					x < bar->bx + bar->bw &&
+					y > bar->by &&
+					y < bar->by + bar->bh)
+					return;
+	} else
+		force_warp = 0;
 
 	XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w / 2, c->h / 2);
 }