From 12e0fc50ff6b02ac926b77b7d16601ef8051309b Mon Sep 17 00:00:00 2001
From: Sourav Nayak <nonameblank007@gmail.com>
Date: Thu, 2 Jul 2026 23:01:18 +0530
Subject: [PATCH] Fullscreen current window and overlay application

This actually fullscreens a window, instead of just hiding the statusbar
and applying the monocle layout with [Alt]+[Shift]+[f].

Addition to this patch now supports overlay apllication through config rules,
that require fullscreen on run. e.g., KDE Presentation Mode, Quickshell custom overlays... etc.

Note: If using a compositor like picom, do disable blur for those applications
---
 config.def.h |  7 ++++---
 dwm.1        |  3 +++
 dwm.c        | 14 ++++++++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/config.def.h b/config.def.h
index 81c3fc0..03edae9 100644
--- a/config.def.h
+++ b/config.def.h
@@ -26,9 +26,9 @@ static const Rule rules[] = {
 	 *	WM_CLASS(STRING) = instance, class
 	 *	WM_NAME(STRING) = title
 	 */
-	/* class      instance    title       tags mask     isfloating   monitor */
-	{ "Gimp",     NULL,       NULL,       0,            1,           -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           -1 },
+	/* class      instance    title       tags mask     isfloating   isfullscreen   monitor */
+	{ "Gimp",     NULL,       NULL,       0,            1,           0,             -1 },
+	{ "Firefox",  NULL,       NULL,       1 << 8,       0,           0,             -1 },
 };
 
 /* layout(s) */
@@ -80,6 +80,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
+	{ MODKEY|ShiftMask,             XK_f,      togglefullscr,  {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
 	{ MODKEY|ShiftMask,             XK_0,      tag,            {.ui = ~0 } },
 	{ MODKEY,                       XK_comma,  focusmon,       {.i = -1 } },
diff --git a/dwm.1 b/dwm.1
index ddc8321..3d310ac 100644
--- a/dwm.1
+++ b/dwm.1
@@ -116,6 +116,9 @@ Zooms/cycles focused window to/from master area (tiled layouts only).
 .B Mod1\-Shift\-c
 Close focused window.
 .TP
+.B Mod1\-Shift\-f
+Toggle fullscreen for focused window.
+.TP
 .B Mod1\-Shift\-space
 Toggle focused window between tiled and floating state.
 .TP
diff --git a/dwm.c b/dwm.c
index 53b393e..228c9b3 100644
--- a/dwm.c
+++ b/dwm.c
@@ -137,6 +137,7 @@ typedef struct {
 	const char *title;
 	unsigned int tags;
 	int isfloating;
+	int isfullscreen;
 	int monitor;
 } Rule;
 
@@ -210,6 +211,7 @@ static void tagmon(const Arg *arg);
 static void tile(Monitor *m);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void togglefullscr(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
 static void unfocus(Client *c, int setfocus);
@@ -284,6 +286,7 @@ applyrules(Client *c)
 	XClassHint ch = { NULL, NULL };
 
 	/* rule matching */
+	int isfullscreen = 0;
 	c->isfloating = 0;
 	c->tags = 0;
 	XGetClassHint(dpy, c->win, &ch);
@@ -296,6 +299,8 @@ applyrules(Client *c)
 		&& (!r->class || strstr(class, r->class))
 		&& (!r->instance || strstr(instance, r->instance)))
 		{
+			isfullscreen = r->isfullscreen;
+			
 			c->isfloating = r->isfloating;
 			c->tags |= r->tags;
 			for (m = mons; m && m->num != r->monitor; m = m->next);
@@ -307,6 +312,8 @@ applyrules(Client *c)
 		XFree(ch.res_class);
 	if (ch.res_name)
 		XFree(ch.res_name);
+	if (isfullscreen)
+		setfullscreen(c, 1);
 	c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
 }
 
@@ -1735,6 +1742,13 @@ togglefloating(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+togglefullscr(const Arg *arg)
+{
+  if(selmon->sel)
+    setfullscreen(selmon->sel, !selmon->sel->isfullscreen);
+}
+
 void
 toggletag(const Arg *arg)
 {
-- 
2.54.0