allow tags to lock down their layout

Author: snhilde

dwm-locklayout-6.2.diff

@@ -0,0 +1,78 @@
+From 57ab331f1ef2d9724d48d75b1443d889323dbc3d Mon Sep 17 00:00:00 2001
+From: Hilde N <[email protected]>
+Date: Sat, 23 May 2020 21:34:12 -0400
+Subject: [PATCH] allow tags to lock down their layout
+
+---
+ config.def.h |  8 ++++----
+ dwm.c        | 14 +++++++++++++-
+ 2 files changed, 17 insertions(+), 5 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 1c0b587..160f484 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -37,10 +37,10 @@ static const int nmaster     = 1;    /* number of clients in master area */
+ static const int resizehints = 1;    /* 1 means respect size hints in tiled resizals */
+ 
+ static const Layout layouts[] = {
+-	/* symbol     arrange function */
+-	{ "[]=",      tile },    /* first entry is default */
+-	{ "><>",      NULL },    /* no layout function means floating behavior */
+-	{ "[M]",      monocle },
++	/* symbol     arrange function   tag mask*/
++	{ "[]=",      tile,              0 },    /* first entry is default */
++	{ "><>",      NULL,              0 },    /* no layout function means floating behavior */
++	{ "[M]",      monocle,           0 },
+ };
+ 
+ /* key definitions */
+diff --git a/dwm.c b/dwm.c
+index 9fd0286..1783da0 100644
+--- a/dwm.c
++++ b/dwm.c
+@@ -109,6 +109,7 @@ typedef struct {
+ typedef struct {
+ 	const char *symbol;
+ 	void (*arrange)(Monitor *);
++	unsigned int tags;
+ } Layout;
+ 
+ struct Monitor {
+@@ -471,7 +472,7 @@ void
+ cleanup(void)
+ {
+ 	Arg a = {.ui = ~0};
+-	Layout foo = { "", NULL };
++	Layout foo = { "", NULL, 0 };
+ 	Monitor *m;
+ 	size_t i;
+ 
+@@ -2038,6 +2039,9 @@ updatewmhints(Client *c)
+ void
+ view(const Arg *arg)
+ {
++	int i;
++	Arg tmparg;
++
+ 	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
+ 		return;
+ 	selmon->seltags ^= 1; /* toggle sel tagset */
+@@ -2045,6 +2049,14 @@ view(const Arg *arg)
+ 		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
+ 	focus(NULL);
+ 	arrange(selmon);
++
++	for (i = 0; i < LENGTH(layouts); i++) {
++		if (selmon->tagset[selmon->seltags] & layouts[i].tags) {
++			tmparg.v = &layouts[i];
++			setlayout(&tmparg);
++			break;
++		}
++	}
+ }
+ 
+ Client *
+-- 
+2.26.2
+