Adding quitonlyonempty patch and made monocle layout position configurable for fullscreen and warp patches

README.md

@@ -13,6 +13,8 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
+2019-10-03 - Added onlyquitonempty patch
+
 2019-10-02 - Added restartsig, emptyview, focusurgent and focusadjacenttag patches
 
 2019-10-01 - Added leftlayout, fullscreen, holdbar and unfloatvisible patches
@@ -135,6 +137,9 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
       - adds rules per monitor, e.g. have default layouts per monitor
       - the use case for this is if the second monitor is vertical (i.e. rotated) then you may want to use a different default layout for this monitor than what is used for the main monitor (for example normal vertical split for main monitor and horizontal split for the second)
 
+   - [onlyquitonempty](https://dwm.suckless.org/patches/onlyquitonempty/)
+      - makes it so dwm will only exit via quit() if no windows are open (in order to prevent accidental loss of work)
+
    - [pertag](https://dwm.suckless.org/patches/pertag/)
       - adds nmaster, mfact, layouts and more per tag rather than per monitor
 

config.def.h

@@ -29,6 +29,9 @@ static const unsigned int systrayspacing = 2;   /* systray spacing */
 static const int systraypinningfailfirst = 1;   /* 1: if pinning fails, display systray on the first monitor, False: display systray on the last monitor*/
 static const int showsystray             = 1;   /* 0 means no systray */
 #endif // SYSTRAY_PATCH
+#if ONLYQUITONEMPTY_PATCH
+static const int quit_empty_window_count = 2;   /* only allow dwm to quit if no windows are open, value here represents number of deamons */
+#endif // ONLYQUITONEMPTY_PATCH
 static const char *fonts[]               = { "monospace:size=10" };
 static const char dmenufont[]            = "monospace:size=10";
 
@@ -210,6 +213,9 @@ static const int resizehints = 1;    /* 1 means respect size hints in tiled resi
 #define FORCE_VSPLIT 1
 #endif
 
+/* Position of the monocle layout in the layouts variable, used by warp and fullscreen patches */
+#define MONOCLE_LAYOUT_POS 2
+
 #if FLEXTILE_DELUXE_LAYOUT
 static const Layout layouts[] = {
 	/* symbol     arrange function, { nmaster, nstack, layout, master axis, stack axis, secondary stack axis } */

dwm.c

@@ -1978,11 +1978,30 @@ propertynotify(XEvent *e)
 void
 quit(const Arg *arg)
 {
+	#if ONLYQUITONEMPTY_PATCH
+	unsigned int n;
+	Window *junk = malloc(1);
+
+	XQueryTree(dpy, root, junk, junk, &junk, &n);
+
+	if (n == quit_empty_window_count) {
+		#if RESTARTSIG_PATCH
+		if (arg->i)
+			restart = 1;
+		#endif // RESTARTSIG_PATCH
+		running = 0;
+	}
+	else
+		printf("[dwm] not exiting (n=%d)\n", n);
+
+	free(junk);
+	#else
 	#if RESTARTSIG_PATCH
 	if (arg->i)
 		restart = 1;
 	#endif // RESTARTSIG_PATCH
 	running = 0;
+	#endif // ONLYQUITONEMPTY_PATCH
 }
 
 Monitor *
@@ -2153,7 +2172,7 @@ restack(Monitor *m)
 	XSync(dpy, False);
 	while (XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 	#if WARP_PATCH
-	if (m == selmon && (m->tagset[m->seltags] & m->sel->tags) && selmon->lt[selmon->sellt] != &layouts[2]) // <-- NB! hardcoded monocle
+	if (m == selmon && (m->tagset[m->seltags] & m->sel->tags) && selmon->lt[selmon->sellt] != &layouts[MONOCLE_LAYOUT_POS])
 		warp(m->sel);
 	#endif // WARP_PATCH
 }

patch/fullscreen.c

@@ -1,11 +1,11 @@
-Layout *last_layout;
+Layout *last_layout = &layouts[0];
 
 void
 fullscreen(const Arg *arg)
 {
 	if (selmon->showbar) {
 		for (last_layout = (Layout *)layouts; last_layout != selmon->lt[selmon->sellt]; last_layout++);
-		setlayout(&((Arg) { .v = &layouts[2] })); // <-- NB! hardcoded monocle
+		setlayout(&((Arg) { .v = &layouts[MONOCLE_LAYOUT_POS] }));
 	} else {
 		setlayout(&((Arg) { .v = last_layout }));
 	}

patches.h

@@ -197,6 +197,12 @@
  */
 #define MONITOR_RULES_PATCH 0
 
+/* This patch makes it so dwm will only exit via quit() if no windows are open.
+ * This is to prevent you accidentally losing all your work.
+ * https://dwm.suckless.org/patches/onlyquitonempty/
+ */
+#define ONLYQUITONEMPTY_PATCH 0
+
 /* The pertag patch adds nmaster, mfacts and layouts per tag rather than per
  * monitor (default).
  * https://dwm.suckless.org/patches/pertag/