add tag and view functions

config.def.h

@@ -1,6 +1,9 @@
 /* appearance */
 static const float rootcolor[]      = {0.3, 0.3, 0.3, 1.0};
 
+/* tagging */
+static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
+
 /* layout(s) */
 static const Layout layouts[] = {
 	/* symbol     arrange function */
@@ -27,6 +30,9 @@ static const struct xkb_rule_names xkb_rules = {
 };
 
 #define MODKEY WLR_MODIFIER_ALT
+#define TAGKEYS(KEY,SKEY,TAG) \
+	{ MODKEY,                    KEY,            view,            {.ui = 1 << TAG} }, \
+	{ MODKEY|WLR_MODIFIER_SHIFT, SKEY,           tag,             {.ui = 1 << TAG} }
 
 /* commands */
 static const char *termcmd[]  = { "kitty", "-o", "linux_display_server=wayland", NULL };
@@ -36,9 +42,21 @@ static const Key keys[] = {
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Return,     spawn,          {.v = termcmd } },
 	{ MODKEY,                    XKB_KEY_j,          focusstack,     {.i = +1} },
 	{ MODKEY,                    XKB_KEY_k,          focusstack,     {.i = -1} },
+	{ MODKEY,                    XKB_KEY_Tab,        view,           {0} },
 	{ MODKEY,                    XKB_KEY_t,          setlayout,      {.v = &layouts[0]} },
 	{ MODKEY,                    XKB_KEY_f,          setlayout,      {.v = &layouts[1]} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
+	{ MODKEY,                    XKB_KEY_0,          view,           {.ui = ~0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright, tag,            {.ui = ~0} },
+	TAGKEYS(          XKB_KEY_1, XKB_KEY_exclam,                     0),
+	TAGKEYS(          XKB_KEY_2, XKB_KEY_at,                         1),
+	TAGKEYS(          XKB_KEY_3, XKB_KEY_numbersign,                 2),
+	TAGKEYS(          XKB_KEY_4, XKB_KEY_dollar,                     3),
+	TAGKEYS(          XKB_KEY_5, XKB_KEY_percent,                    4),
+	TAGKEYS(          XKB_KEY_6, XKB_KEY_caret,                      5),
+	TAGKEYS(          XKB_KEY_7, XKB_KEY_ampersand,                  6),
+	TAGKEYS(          XKB_KEY_8, XKB_KEY_asterisk,                   7),
+	TAGKEYS(          XKB_KEY_9, XKB_KEY_parenleft,                  8),
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Q,          quit,           {0} },
 };
 

dwl.c

@@ -32,8 +32,9 @@
 /* macros */
 #define MIN(A, B)               ((A) < (B) ? (A) : (B))
 #define CLEANMASK(mask)         (mask & ~WLR_MODIFIER_CAPS)
-#define VISIBLEON(C, M)         ((C)->mon == (M))
+#define VISIBLEON(C, M)         ((C)->mon == (M) && ((C)->tags & (M)->tagset[(M)->seltags]))
 #define LENGTH(X)               (sizeof X / sizeof X[0])
+#define TAGMASK                 ((1 << LENGTH(tags)) - 1)
 
 /* enums */
 enum { CurNormal, CurMove, CurResize }; /* cursor */
@@ -64,6 +65,7 @@ typedef struct {
 	struct wl_listener request_resize;
 	Monitor *mon;
 	int x, y; /* layout-relative */
+	unsigned int tags;
 	int isfloating;
 } Client;
 
@@ -94,7 +96,9 @@ struct Monitor {
 	struct wlr_box *geom; /* layout-relative */
 	int wx, wy, ww, wh; /* layout-relative */
 	const Layout *lt[2];
+	unsigned int seltags;
 	unsigned int sellt;
+	unsigned int tagset[2];
 	double mfact;
 	int nmaster;
 };
@@ -147,9 +151,11 @@ static void setcursor(struct wl_listener *listener, void *data);
 static void setlayout(const Arg *arg);
 static void setup(void);
 static void spawn(const Arg *arg);
+static void tag(const Arg *arg);
 static void tile(Monitor *m);
 static void togglefloating(const Arg *arg);
 static void unmapnotify(struct wl_listener *listener, void *data);
+static void view(const Arg *arg);
 static Client *xytoclient(double x, double y,
 		struct wlr_surface **surface, double *sx, double *sy);
 static Monitor *xytomon(double x, double y);
@@ -290,6 +296,7 @@ createmon(struct wl_listener *listener, void *data)
 	/* Allocates and configures monitor state using configured rules */
 	Monitor *m = calloc(1, sizeof(*m));
 	m->wlr_output = wlr_output;
+	m->tagset[0] = m->tagset[1] = 1;
 	int i;
 	for (i = 0; i < LENGTH(monrules); i++) {
 		if (!monrules[i].name ||
@@ -564,6 +571,7 @@ maprequest(struct wl_listener *listener, void *data)
 
 	/* Insert this client into the list and focus it. */
 	c->mon = selmon;
+	c->tags = c->mon->tagset[c->mon->seltags];
 	wl_list_insert(&clients, &c->link);
 	wl_list_insert(&fstack, &c->flink);
 	focus(c, NULL);
@@ -776,6 +784,12 @@ rendermon(struct wl_listener *listener, void *data)
 	 * our client list is ordered front-to-back, we iterate over it backwards. */
 	Client *c;
 	wl_list_for_each_reverse(c, &clients, link) {
+		/* Only render clients which are on this monitor. */
+		/* XXX consider checking wlr_output_layout_intersects, in case a
+		 * window can be seen on multiple outputs */
+		if (!VISIBLEON(c, m))
+			continue;
+
 		struct render_data rdata = {
 			.output = m->wlr_output,
 			.when = &now,
@@ -784,8 +798,7 @@ rendermon(struct wl_listener *listener, void *data)
 		};
 		/* This calls our render function for each surface among the
 		 * xdg_surface's toplevel and popups. */
-		wlr_xdg_surface_for_each_surface(c->xdg_surface,
-				render, &rdata);
+		wlr_xdg_surface_for_each_surface(c->xdg_surface, render, &rdata);
 	}
 
 	/* Hardware cursors are rendered by the GPU on a separate plane, and can be
@@ -1047,6 +1060,16 @@ spawn(const Arg *arg)
 	}
 }
 
+void
+tag(const Arg *arg)
+{
+	Client *sel = selclient();
+	if (sel && arg->ui & TAGMASK) {
+		sel->tags = arg->ui & TAGMASK;
+		focus(NULL, NULL);
+	}
+}
+
 void
 tile(Monitor *m)
 {
@@ -1106,6 +1129,17 @@ unmapnotify(struct wl_listener *listener, void *data)
 		focus(NULL, NULL);
 }
 
+void
+view(const Arg *arg)
+{
+	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
+		return;
+	selmon->seltags ^= 1; /* toggle sel tagset */
+	if (arg->ui & TAGMASK)
+		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
+	focus(NULL, NULL);
+}
+
 Client *
 xytoclient(double x, double y,
 		struct wlr_surface **surface, double *sx, double *sy)