From 7d6a517f890828b497fcfe28f8d10d5bced4bc3e Mon Sep 17 00:00:00 2001
From: Bakkeby <bakkeby@gmail.com>
Date: Mon, 10 Jan 2022 11:31:15 +0100
Subject: [PATCH] fakefullscreenclient - enable fake fullscreen on a per client
  basis

---
 config.def.h |  1 +
 dwm.c        | 61 ++++++++++++++++++++++++++++++++++++++++++++++------
 2 files changed, 55 insertions(+), 7 deletions(-)

diff --git a/config.def.h b/config.def.h
index a2ac963..7e6b2ff 100644
--- a/config.def.h
+++ b/config.def.h
@@ -78,6 +78,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_f,      setlayout,      {.v = &layouts[1]} },
 	{ MODKEY,                       XK_m,      setlayout,      {.v = &layouts[2]} },
 	{ MODKEY,                       XK_space,  setlayout,      {0} },
+	{ MODKEY|ShiftMask,             XK_f,      togglefakefullscreen, {0} },
 	{ MODKEY|ShiftMask,             XK_space,  togglefloating, {0} },
 	{ MODKEY,                       XK_0,      view,           {.ui = ~0 } },
 	{ MODKEY|ShiftMask,             XK_0,      tag,            {.ui = ~0 } },
diff --git a/dwm.c b/dwm.c
index a96f33c..b95f50f 100644
--- a/dwm.c
+++ b/dwm.c
@@ -93,6 +93,7 @@ struct Client {
 	int bw, oldbw;
 	unsigned int tags;
 	int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
+	int fakefullscreen;
 	Client *next;
 	Client *snext;
 	Monitor *mon;
@@ -211,6 +212,7 @@ static void tag(const Arg *arg);
 static void tagmon(const Arg *arg);
 static void tile(Monitor *);
 static void togglebar(const Arg *arg);
+static void togglefakefullscreen(const Arg *arg);
 static void togglefloating(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
@@ -566,7 +568,7 @@ configurenotify(XEvent *e)
 			updatebars();
 			for (m = mons; m; m = m->next) {
 				for (c = m->clients; c; c = c->next)
-					if (c->isfullscreen)
+					if (c->isfullscreen && c->fakefullscreen != 1)
 						resizeclient(c, m->mx, m->my, m->mw, m->mh);
 				XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
 			}
@@ -1147,7 +1149,7 @@ movemouse(const Arg *arg)
 
 	if (!(c = selmon->sel))
 		return;
-	if (c->isfullscreen) /* no support moving fullscreen windows by mouse */
+	if (c->isfullscreen && c->fakefullscreen != 1) /* no support moving fullscreen windows by mouse */
 		return;
 	restack(selmon);
 	ocx = c->x;
@@ -1288,7 +1290,10 @@ resizeclient(Client *c, int x, int y, int w, int h)
 	wc.border_width = c->bw;
 	XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
 	configure(c);
-	XSync(dpy, False);
+	if (c->fakefullscreen == 1)
+		XSync(dpy, True);
+	else
+		XSync(dpy, False);
 }
 
 void
@@ -1302,7 +1307,7 @@ resizemouse(const Arg *arg)
 
 	if (!(c = selmon->sel))
 		return;
-	if (c->isfullscreen) /* no support resizing fullscreen windows by mouse */
+	if (c->isfullscreen && c->fakefullscreen != 1) /* no support resizing fullscreen windows by mouse */
 		return;
 	restack(selmon);
 	ocx = c->x;
@@ -1480,8 +1485,10 @@ setfullscreen(Client *c, int fullscreen)
 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
 			PropModeReplace, (unsigned char*)&netatom[NetWMFullscreen], 1);
 		c->isfullscreen = 1;
-		c->oldstate = c->isfloating;
 		c->oldbw = c->bw;
+		if (c->fakefullscreen == 1)
+			return;
+		c->oldstate = c->isfloating;
 		c->bw = 0;
 		c->isfloating = 1;
 		resizeclient(c, c->mon->mx, c->mon->my, c->mon->mw, c->mon->mh);
@@ -1490,8 +1497,12 @@ setfullscreen(Client *c, int fullscreen)
 		XChangeProperty(dpy, c->win, netatom[NetWMState], XA_ATOM, 32,
 			PropModeReplace, (unsigned char*)0, 0);
 		c->isfullscreen = 0;
-		c->isfloating = c->oldstate;
 		c->bw = c->oldbw;
+		if (c->fakefullscreen == 1)
+			return;
+		if (c->fakefullscreen == 2)
+			c->fakefullscreen = 1;
+		c->isfloating = c->oldstate;
 		c->x = c->oldx;
 		c->y = c->oldy;
 		c->w = c->oldw;
@@ -1711,12 +1722,48 @@ togglebar(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+togglefakefullscreen(const Arg *arg)
+{
+	Client *c = selmon->sel;
+	if (!c)
+		return;
+
+	if (c->fakefullscreen) {
+		if (c->isfullscreen) {
+			if (c->isfloating && c->fakefullscreen == 1) {
+				c->oldstate = c->isfloating;
+				c->oldx = c->x;
+				c->oldy = c->y;
+				c->oldw = c->w;
+				c->oldh = c->h;
+			}
+			c->fakefullscreen = 0;
+		}
+		else
+			c->isfullscreen = 0;
+	} else {
+		c->fakefullscreen = 1;
+		if (c->isfullscreen) {
+			c->isfloating = c->oldstate;
+			c->bw = c->oldbw;
+			c->x = c->oldx;
+			c->y = c->oldy;
+			c->w = c->oldw;
+			c->h = c->oldh;
+			resizeclient(c, c->x, c->y, c->w, c->h);
+		}
+		c->isfullscreen = 0;
+	}
+	setfullscreen(c, !c->isfullscreen);
+}
+
 void
 togglefloating(const Arg *arg)
 {
 	if (!selmon->sel)
 		return;
-	if (selmon->sel->isfullscreen) /* no support for fullscreen windows */
+	if (selmon->sel->isfullscreen && selmon->sel->fakefullscreen != 1) /* no support for fullscreen windows */
 		return;
 	selmon->sel->isfloating = !selmon->sel->isfloating || selmon->sel->isfixed;
 	if (selmon->sel->isfloating)
-- 
2.19.1