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dwm-virtualkb-6.4.diff

/* diff file to add a virtual keyboard to dwm thorugh a shortcut */
diff -up a/config.def.h b/config.def.h
--- a/config.def.h	2023-12-19 17:08:29.127179493 +0100
+++ b/config.def.h	2023-12-19 15:42:15.396789363 +0100
@@ -5,6 +5,7 @@ static const unsigned int borderpx  = 1;
 static const unsigned int snap      = 32;       /* snap pixel */
 static const int showbar            = 1;        /* 0 means no bar */
 static const int topbar             = 1;        /* 0 means bottom bar */
+static const int kb_height_div      = 3;      /* height of the keyboard */
 static const char *fonts[]          = { "monospace:size=10" };
 static const char dmenufont[]       = "monospace:size=10";
 static const char col_gray1[]       = "#222222";
@@ -58,6 +59,7 @@ static const Layout layouts[] = {
 /* commands */
 static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_gray1, "-nf", col_gray3, "-sb", col_cyan, "-sf", col_gray4, NULL };
+static const char *svkbdcmd[] = { "svkbd-mobile-intl", "-fn", dmenufont, "-g", "\n", NULL };
 static const char *termcmd[]  = { "st", NULL };
 
 static const Key keys[] = {
@@ -85,6 +87,7 @@ static const Key keys[] = {
 	{ MODKEY,                       XK_period, focusmon,       {.i = +1 } },
 	{ MODKEY|ShiftMask,             XK_comma,  tagmon,         {.i = -1 } },
 	{ MODKEY|ShiftMask,             XK_period, tagmon,         {.i = +1 } },
+	{ MODKEY,                       XK_n,      openkeyboard,   {0} },
 	TAGKEYS(                        XK_1,                      0)
 	TAGKEYS(                        XK_2,                      1)
 	TAGKEYS(                        XK_3,                      2)
diff -up a/dwm.c b/dwm.c
--- a/dwm.c	2023-12-19 17:08:29.127179493 +0100
+++ b/dwm.c	2023-12-19 15:40:24.417567233 +0100
@@ -119,6 +119,7 @@ struct Monitor {
 	int by;               /* bar geometry */
 	int mx, my, mw, mh;   /* screen size */
 	int wx, wy, ww, wh;   /* window area  */
+	int gap_keyboard;
 	unsigned int seltags;
 	unsigned int sellt;
 	unsigned int tagset[2];
@@ -233,6 +234,7 @@ static int xerror(Display *dpy, XErrorEv
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
+static void openkeyboard(const Arg *arg);
 
 /* variables */
 static const char broken[] = "broken";
@@ -638,6 +640,7 @@ createmon(void)
 	m = ecalloc(1, sizeof(Monitor));
 	m->tagset[0] = m->tagset[1] = 1;
 	m->mfact = mfact;
+	m->gap_keyboard = 0;
 	m->nmaster = nmaster;
 	m->showbar = showbar;
 	m->topbar = topbar;
@@ -1122,7 +1125,7 @@ monocle(Monitor *m)
 	if (n > 0) /* override layout symbol */
 		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
 	for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
-		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
+		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, (m->wh - m->gap_keyboard) - 2 * c->bw, 0);
 }
 
 void
@@ -1700,12 +1703,12 @@ tile(Monitor *m)
 		mw = m->ww;
 	for (i = my = ty = 0, c = nexttiled(m->clients); c; c = nexttiled(c->next), i++)
 		if (i < m->nmaster) {
-			h = (m->wh - my) / (MIN(n, m->nmaster) - i);
+			h = ((m->wh - m->gap_keyboard) - my) / (MIN(n, m->nmaster) - i);
 			resize(c, m->wx, m->wy + my, mw - (2*c->bw), h - (2*c->bw), 0);
 			if (my + HEIGHT(c) < m->wh)
 				my += HEIGHT(c);
 		} else {
-			h = (m->wh - ty) / (n - i);
+			h = ((m->wh - m->gap_keyboard) - ty) / (n - i);
 			resize(c, m->wx + mw, m->wy + ty, m->ww - mw - (2*c->bw), h - (2*c->bw), 0);
 			if (ty + HEIGHT(c) < m->wh)
 				ty += HEIGHT(c);
@@ -2139,6 +2142,49 @@ zoom(const Arg *arg)
 		return;
 	pop(c);
 }
+void
+openkeyboard(const Arg *arg)
+{
+	struct sigaction sa;
+	static int       pid = 0;
+	static int       i = 0;
+	static char      size_kb[20] = {
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+	};
+
+	if (selmon->gap_keyboard != 0)
+		selmon->gap_keyboard = 0;
+	if (pid != 0) {
+		kill(pid, SIGKILL);
+		pid = 0;
+		selmon->gap_keyboard = 0;
+	} else {
+		for (i = 0; svkbdcmd[i]; i++)
+			if (svkbdcmd[i][0] == '\n')
+				break;
+		if (svkbdcmd[i] && svkbdcmd[i][0] == '\n') {
+			memset(size_kb, 0, 20);
+			sprintf(size_kb, "%dx%d", sw, sh / kb_height_div);
+			svkbdcmd[i] = size_kb;
+		}
+		if ((pid = fork()) == 0) {
+			if (dpy)
+				close(ConnectionNumber(dpy));
+			setsid();
+
+			sigemptyset(&sa.sa_mask);
+			sa.sa_flags = 0;
+			sa.sa_handler = SIG_DFL;
+			sigaction(SIGCHLD, &sa, NULL);
+
+			execvp(((char **)svkbdcmd)[0], (char **)svkbdcmd);
+			die("dwm: execvp '%s' failed:", ((char **)svkbdcmd)[0]);
+		} else {
+			selmon->gap_keyboard = sh / 3;
+		}
+	}
+}
 
 int
 main(int argc, char *argv[])