From a9dc99543fe07801587ed1b412cd97b5da01474f Mon Sep 17 00:00:00 2001
From: Listeria monocytogenes <listeria@disroot.org>
Date: Wed, 26 Jun 2024 11:49:20 -0300
Subject: [PATCH] add setscheme() to cycle between colorschemes

---
 config.def.h | 15 +++++++++++----
 dwm.c        | 37 ++++++++++++++++++++++++++++---------
 2 files changed, 39 insertions(+), 13 deletions(-)

diff --git a/config.def.h b/config.def.h
index 9efa774..f87f707 100644
--- a/config.def.h
+++ b/config.def.h
@@ -12,10 +12,16 @@ static const char col_gray2[]       = "#444444";
 static const char col_gray3[]       = "#bbbbbb";
 static const char col_gray4[]       = "#eeeeee";
 static const char col_cyan[]        = "#005577";
-static const char *colors[][3]      = {
-	/*               fg         bg         border   */
-	[SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
-	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
+static const char *colors[][SchemeN][3] = {
+		/*               fg         bg         border   */
+	{ /* dark */
+		[SchemeNorm] = { col_gray3, col_gray1, col_gray2 },
+		[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
+	},
+	{ /* light */
+		[SchemeNorm] = { col_gray2, col_gray4, col_gray3 },
+		[SchemeSel]  = { col_gray1, col_cyan,  col_cyan  },
+	},
 };
 
 /* tagging */
@@ -85,6 +91,7 @@ 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_s,      setscheme,      {.i = +1 } },
 	TAGKEYS(                        XK_1,                      0)
 	TAGKEYS(                        XK_2,                      1)
 	TAGKEYS(                        XK_3,                      2)
diff --git a/dwm.c b/dwm.c
index f1d86b2..1ac8e05 100644
--- a/dwm.c
+++ b/dwm.c
@@ -59,7 +59,7 @@
 
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
-enum { SchemeNorm, SchemeSel }; /* color schemes */
+enum { SchemeNorm, SchemeSel, SchemeN /* keeplast */ }; /* color schemes */
 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
        NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
@@ -202,6 +202,7 @@ static void setfocus(Client *c);
 static void setfullscreen(Client *c, int fullscreen);
 static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
+static void setscheme(const Arg *arg);
 static void setup(void);
 static void seturgent(Client *c, int urg);
 static void showhide(Client *c);
@@ -262,7 +263,7 @@ static void (*handler[LASTEvent]) (XEvent *) = {
 static Atom wmatom[WMLast], netatom[NetLast];
 static int running = 1;
 static Cur *cursor[CurLast];
-static Clr **scheme;
+static Clr **schemes, **scheme;
 static Display *dpy;
 static Drw *drw;
 static Monitor *mons, *selmon;
@@ -486,9 +487,9 @@ cleanup(void)
 		cleanupmon(mons);
 	for (i = 0; i < CurLast; i++)
 		drw_cur_free(drw, cursor[i]);
-	for (i = 0; i < LENGTH(colors); i++)
-		free(scheme[i]);
-	free(scheme);
+	for (i = 0; i < LENGTH(colors) * SchemeN; i++)
+		free(schemes[i]);
+	free(schemes);
 	XDestroyWindow(dpy, wmcheckwin);
 	drw_free(drw);
 	XSync(dpy, False);
@@ -1536,10 +1537,25 @@ setmfact(const Arg *arg)
 	arrange(selmon);
 }
 
+void
+setscheme(const Arg *arg)
+{
+	ptrdiff_t si = (scheme - schemes) + arg->i * SchemeN;
+
+	/* wrap around, won't work if (abs(arg->i) > LENGTH(colors)) */
+	if (si < 0)
+		si += LENGTH(colors) * SchemeN;
+	else if (si >= LENGTH(colors) * SchemeN)
+		si -= LENGTH(colors) * SchemeN;
+
+	scheme = &schemes[si];
+	drawbars();
+}
+
 void
 setup(void)
 {
-	int i;
+	int i, j;
 	XSetWindowAttributes wa;
 	Atom utf8string;
 	struct sigaction sa;
@@ -1584,9 +1600,12 @@ setup(void)
 	cursor[CurResize] = drw_cur_create(drw, XC_sizing);
 	cursor[CurMove] = drw_cur_create(drw, XC_fleur);
 	/* init appearance */
-	scheme = ecalloc(LENGTH(colors), sizeof(Clr *));
-	for (i = 0; i < LENGTH(colors); i++)
-		scheme[i] = drw_scm_create(drw, colors[i], 3);
+	schemes = ecalloc(LENGTH(colors), SchemeN * sizeof(Clr *));
+	for (j = LENGTH(colors) - 1; j >= 0; j--) {
+		scheme = &schemes[j * SchemeN];
+		for (i = 0; i < SchemeN; i++)
+			scheme[i] = drw_scm_create(drw, colors[j][i], 3);
+	}
 	/* init bars */
 	updatebars();
 	updatestatus();
-- 
2.45.2