scratchpad.patch

scratchpad.patch for dwm 5.9
A scratchpad is a window that is assigned the (hidden) scratchtag.
A window becomes a scratchpad if its WM_NAME at its creation time is the value
of the scratchpadname variable.
togglescratchpad() is actually a variant of toggleview().

To use this, put the following definitions in config.h:

static const char scratchpadname[] = "Scratchpad"; /* make it unique, avoid name collision */
static const char *scratchpadcmd[] = { "uxterm", "-title", scratchpadname, "-geometry", "80x20", NULL }; /* WM_NAME must be scratchpadname */

static Key keys[] = {
	{ MODKEY|ControlMask,           XK_x,      spawn,            {.v = scratchpadcmd } }, /* for more scratchpads */
	{ MODKEY,                       XK_x,      togglescratchpad, {.v = scratchpadcmd } },
}

BUGS

* With more than one scratchpad, a second scratch does not restore the focus
  state of the last scratch, but will always focus the first scratchpad that is
  found while looping through selmon->clients.
* With more than one scratchpad, only the focused (floating) scratchpad will be
  raised to top of the stack. I think a better behavior would be to raise all
  (floating) scratchpads to top of the stack.

diff -up a/dwm.c b/dwm.c
--- a/dwm.c	2011-07-13 12:00:00.000000000 +0000
+++ b/dwm.c	2011-07-13 12:00:00.000000000 +0000
@@ -224,6 +224,7 @@ static int textnw(const char *text, unsi
 static void tile(Monitor *);
 static void togglebar(const Arg *arg);
 static void togglefloating(const Arg *arg);
+static void togglescratchpad(const Arg *arg);
 static void toggletag(const Arg *arg);
 static void toggleview(const Arg *arg);
 static void unfocus(Client *c, Bool setfocus);
@@ -279,6 +280,9 @@ static Window root;
 /* configuration, allows nested code to access above variables */
 #include "config.h"
 
+/* any client in scratchtag is a scratchpad */
+static unsigned int scratchtag = 1 << LENGTH(tags);
+
 /* compile-time check if all tags fit into an unsigned int bit array. */
 struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
 
@@ -1135,6 +1139,17 @@ manage(Window w, XWindowAttributes *wa)
 		           && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? bh : c->mon->my);
 		c->bw = borderpx;
 	}
+	/* scratchpad */
+	if(!strcmp(c->name, scratchpadname)) {
+		c->mon->tagset[c->mon->seltags] |= c->tags = scratchtag;
+		c->isfloating = True;
+		c->x = (c->mon->mw - WIDTH(c)) / 2;
+		c->y = (c->mon->mh - HEIGHT(c)) / 2;
+	}
+	else {
+		/* anything else must stay out of scratchtag */
+		c->tags &= TAGMASK;
+	}
 	wc.border_width = c->bw;
 	XConfigureWindow(dpy, w, CWBorderWidth, &wc);
 	XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
@@ -1689,6 +1704,27 @@ togglefloating(const Arg *arg) {
 }
 
 void
+togglescratchpad(const Arg *arg) {
+	Client *c = NULL;
+	unsigned int found = 0;
+	/* check if a scratchpad already exists in scratchtag */
+	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;
+			arrange(selmon);
+		}
+		if(ISVISIBLE(c)) {
+			focus(c);
+			restack(selmon);
+		}
+	}
+	else
+		spawn(arg); /* launch a new scratchpad, details handled by manage() */
+}
+
+void
 toggletag(const Arg *arg) {
 	unsigned int newtags;
 

Thanks lolilolicon, I finally got it to work!

One question: How would I make a scratchpad called by a different key combination spawn with a document opened in fx. vim? This is what I'd like it to do:
"urxvt -e vim /home/lys/txt/notes.txt" fx.?
I already changed scratchpadcmd to urxvt, so it's just how I append the latter part, while not overwriting the default scratchpadcmd? Do I copy scratchpadcmd and make a modified version or can I just append something to the shortcut after the ".v = scratchpadcmd" part?

Hi. I would just make a scratchpadcmd2 and use it in the same manner scratchpadcmd is used.

Thanks, I got it to work now! The only caveat is I need to actually exit either scratchpad version manually for the other scratchpad to appear, but it's only a minor problem.