Adding scratchpad patch

README.md

@@ -13,7 +13,7 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
-2019-10-10 - Added mdpcontrol patch
+2019-10-10 - Added mdpcontrol and scratchpad patches
 
 2019-10-08 - Added columns layout and fakefullscreen patch
 
@@ -202,6 +202,9 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
       - saves size and position of every floating window before it is forced into tiled mode
       - if the window is made floating again then the old dimensions will be restored
 
+   - [scratchpad](https://dwm.suckless.org/patches/scratchpad/)
+      - the scratchpad patch allows you to spawn or restore a floating terminal window
+
    - [selfrestart](https://dwm.suckless.org/patches/selfrestart/)
       - restart dwm without the unnecessary dependency of an external script
 

config.def.h

@@ -393,10 +393,18 @@ static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn()
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", normbgcolor, "-nf", normfgcolor, "-sb", selbgcolor, "-sf", selfgcolor, NULL };
 static const char *termcmd[]  = { "st", NULL };
 
+#if SCRATCHPAD_PATCH
+static const char scratchpadname[] = "scratchpad";
+static const char *scratchpadcmd[] = { "st", "-t", scratchpadname, "-g", "120x34", NULL };
+#endif // SCRATCHPAD_PATCH
+
 static Key keys[] = {
 	/* modifier                     key            function             argument */
 	{ MODKEY,                       XK_p,          spawn,               {.v = dmenucmd } },
 	{ MODKEY|ShiftMask,             XK_Return,     spawn,               {.v = termcmd } },
+	#if SCRATCHPAD_PATCH
+	{ MODKEY,                       XK_grave,      togglescratch,       {.v = scratchpadcmd } },
+	#endif // SCRATCHPAD_PATCH
 	{ MODKEY,                       XK_b,          togglebar,           {0} },
 	{ MODKEY,                       XK_j,          focusstack,          {.i = +1 } },
 	{ MODKEY,                       XK_k,          focusstack,          {.i = -1 } },

dwm.c

@@ -1882,6 +1882,16 @@ manage(Window w, XWindowAttributes *wa)
 	c->bw = borderpx;
 	#endif // SETBORDERPX_PATCH
 
+	#if SCRATCHPAD_PATCH
+	selmon->tagset[selmon->seltags] &= ~scratchtag;
+	if (!strcmp(c->name, scratchpadname)) {
+		c->mon->tagset[c->mon->seltags] |= c->tags = scratchtag;
+		c->isfloating = True;
+		c->x = c->mon->wx + (c->mon->ww / 2 - WIDTH(c) / 2);
+		c->y = c->mon->wy + (c->mon->wh / 2 - HEIGHT(c) / 2);
+	}
+	#endif // SCRATCHPAD_PATCH
+
 	wc.border_width = c->bw;
 	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 	#if FLOAT_BORDER_COLOR_PATCH
@@ -2799,6 +2809,9 @@ spawn(const Arg *arg)
 {
 	if (arg->v == dmenucmd)
 		dmenumon[0] = '0' + selmon->num;
+	#if SCRATCHPAD_PATCH
+	selmon->tagset[selmon->seltags] &= ~scratchtag;
+	#endif // SCRATCHPAD_PATCH
 	if (fork() == 0) {
 		if (dpy)
 			close(ConnectionNumber(dpy));

patch/include.c

@@ -94,6 +94,10 @@
 #include "rotatestack.c"
 #endif
 
+#if SCRATCHPAD_PATCH
+#include "scratchpad.c"
+#endif
+
 #if SELFRESTART_PATCH
 #include "selfrestart.c"
 #endif

patch/include.h

@@ -94,6 +94,10 @@
 #include "rotatestack.h"
 #endif
 
+#if SCRATCHPAD_PATCH
+#include "scratchpad.h"
+#endif
+
 #if SELFRESTART_PATCH
 #include "selfrestart.h"
 #endif

patch/scratchpad.c

@@ -0,0 +1,23 @@
+static unsigned int scratchtag = 1 << LENGTH(tags);
+
+void
+togglescratch(const Arg *arg)
+{
+	Client *c;
+	unsigned int found = 0;
+
+	for (c = selmon->clients; c && !(found = c->tags & scratchtag); c = c->next);
+	if (found) {
+		unsigned int newtagset = selmon->tagset[selmon->seltags] ^ scratchtag;
+		if (newtagset) {
+			selmon->tagset[selmon->seltags] = newtagset;
+			focus(NULL);
+			arrange(selmon);
+		}
+		if (ISVISIBLE(c)) {
+			focus(c);
+			restack(selmon);
+		}
+	} else
+		spawn(arg);
+}

patch/scratchpad.h

@@ -0,0 +1 @@
+static void togglescratch(const Arg *arg);

patches.h

@@ -310,6 +310,12 @@
  */
 #define SAVEFLOATS_PATCH 0
 
+/* The scratchpad patch allows you to spawn or restore a floating terminal window.
+ * It is typically useful when one need to do some short typing.
+ * https://dwm.suckless.org/patches/scratchpad/
+ */
+#define SCRATCHPAD_PATCH 0
+
 /* Allows restarting dwm without the dependency of an external script.
  * https://dwm.suckless.org/patches/selfrestart/
  */