Single Tagset Patchmonitors

1 files changed, 167 insertions, 54 deletions

diff --git a/dwm.c b/dwm.c
index db52dce..c8f7233 100644
--- a/dwm.c
+++ b/dwm.c
@@ -55,7 +55,7 @@
 #define CLEANMASK(mask)         (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
 #define INTERSECT(x,y,w,h,m)    (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
                                * MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
-#define ISVISIBLE(C)            ((C->tags & C->mon->tagset[C->mon->seltags]))
+#define ISVISIBLE(C, M)         ((C->tags & M->tagset[M->seltags]))
 #define LENGTH(X)               (sizeof X / sizeof X[0])
 #define MOUSEMASK               (BUTTONMASK|PointerMotionMask)
 #define WIDTH(X)                ((X)->w + 2 * (X)->bw)
@@ -103,6 +103,7 @@ typedef struct {
 	const Arg arg;
 } Button;
 
+typedef struct Clientlist Clientlist;
 typedef struct Monitor Monitor;
 typedef struct Client Client;
 struct Client {
@@ -151,9 +152,8 @@ struct Monitor {
 	unsigned int tagset[2];
 	int showbar;
 	int topbar;
-	Client *clients;
+	Clientlist *cl;
 	Client *sel;
-	Client *stack;
 	Monitor *next;
 	Window barwin;
 	const Layout *lt[2];
@@ -176,12 +176,18 @@ struct Systray {
 	Client *icons;
 };
 
+struct Clientlist {
+	Client *clients;
+	Client *stack;
+};
+
 /* function declarations */
 static void applyrules(Client *c);
 static int applysizehints(Client *c, int *x, int *y, int *w, int *h, int interact);
 static void arrange(Monitor *m);
 static void arrangemon(Monitor *m);
 static void attach(Client *c);
+static void attachclients(Monitor *m);
 static void attachstack(Client *c);
 static void buttonpress(XEvent *e);
 static void checkotherwm(void);
@@ -221,7 +227,7 @@ static void maprequest(XEvent *e);
 static void monocle(Monitor *m);
 static void motionnotify(XEvent *e);
 static void movemouse(const Arg *arg);
-static Client *nexttiled(Client *c);
+static Client *nexttiled(Client *c, Monitor *m);
 static void pop(Client *c);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
@@ -325,6 +331,7 @@ static Display *dpy;
 static Drw *drw;
 static Monitor *mons, *selmon;
 static Window root, wmcheckwin;
+static Clientlist *cl;
 
 static xcb_connection_t *xcon;
 
@@ -361,7 +368,7 @@ applyrules(Client *c)
 			c->noswallow  = r->noswallow;
 			c->isfloating = r->isfloating;
 			c->tags |= r->tags;
-			for (m = mons; m && m->num != r->monitor; m = m->next);
+			for (m = mons; m && (m->tagset[m->seltags] & c->tags) == 0; m = m->next);
 			if (m)
 				c->mon = m;
 		}
@@ -445,9 +452,9 @@ void
 arrange(Monitor *m)
 {
 	if (m)
-		showhide(m->stack);
+		showhide(m->cl->stack);
 	else for (m = mons; m; m = m->next)
-		showhide(m->stack);
+		showhide(m->cl->stack);
 	if (m) {
 		arrangemon(m);
 		restack(m);
@@ -466,15 +473,49 @@ arrangemon(Monitor *m)
 void
 attach(Client *c)
 {
-	c->next = c->mon->clients;
-	c->mon->clients = c;
+	c->next = c->mon->cl->clients;
+	c->mon->cl->clients = c;
+}
+
+void
+attachclients(Monitor *m) {
+	/* attach clients to the specified monitor */
+	Monitor *tm;
+	Client *c;
+	unsigned int utags = 0;
+	Bool rmons = False;
+	if(!m)
+		return;
+
+	/* collect information about the tags in use */
+	for (tm = mons; tm; tm = tm->next)
+		if(tm != m)
+			utags |= tm->tagset[tm->seltags];
+
+	for (c = m->cl->clients; c; c = c->next)
+		if(ISVISIBLE(c, m)) {
+			/* if client is also visible on other tags that are displayed on
+			 * other monitors, remove these tags */
+			if(c->tags & utags) {
+				c->tags = c->tags & m->tagset[m->seltags];
+				rmons = True;
+			}
+			unfocus(c, True);
+			c->mon = m;
+		}
+
+	if (rmons)
+		for (tm = mons; tm; tm = tm->next)
+			if(tm != m)
+				arrange(tm);
+
 }
 
 void
 attachstack(Client *c)
 {
-	c->snext = c->mon->stack;
-	c->mon->stack = c;
+	c->snext = c->mon->cl->stack;
+	c->mon->cl->stack = c;
 }
 
 void
@@ -604,8 +645,8 @@ cleanup(void)
 	view(&a);
 	selmon->lt[selmon->sellt] = &foo;
 	for (m = mons; m; m = m->next)
-		while (m->stack)
-			unmanage(m->stack, 0);
+		while (m->cl->stack)
+			unmanage(m->cl->stack, 0);
 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
 	while (mons)
 		cleanupmon(mons);
@@ -748,7 +789,7 @@ configurenotify(XEvent *e)
 			drw_resize(drw, sw, bh);
 			updatebars();
 			for (m = mons; m; m = m->next) {
-				for (c = m->clients; c; c = c->next)
+				for (c = m->cl->clients; c; c = c->next)
 					if (c->isfullscreen)
 						resizeclient(c, m->mx, m->my, m->mw, m->mh);
 				resizebarwin(m);
@@ -794,7 +835,7 @@ configurerequest(XEvent *e)
 				c->y = m->my + (m->mh / 2 - HEIGHT(c) / 2); /* center in y direction */
 			if ((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight)))
 				configure(c);
-			if (ISVISIBLE(c))
+			if (ISVISIBLE(c, m))
 				XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 		} else
 			configure(c);
@@ -814,10 +855,31 @@ configurerequest(XEvent *e)
 Monitor *
 createmon(void)
 {
-	Monitor *m;
+	Monitor *m, *tm;
+	int i;
 
+	/* bail out if the number of monitors exceeds the number of tags */
+	for (i=1, tm=mons; tm; i++, tm=tm->next);
+	if (i > LENGTH(tags)) {
+		fprintf(stderr, "dwm: failed to add monitor, number of tags exceeded\n");
+		return NULL;
+	}
+	/* find the first tag that isn't in use */
+	for (i=0; i < LENGTH(tags); i++) {
+		for (tm=mons; tm && !(tm->tagset[tm->seltags] & (1<<i)); tm=tm->next);
+		if (!tm)
+			break;
+	}
+	/* reassign all tags to monitors since there's currently no free tag for the
+	 * new monitor */
+	if (i >= LENGTH(tags))
+		for (i=0, tm=mons; tm; tm=tm->next, i++) {
+			tm->seltags ^= 1;
+			tm->tagset[tm->seltags] = (1<<i) & TAGMASK;
+		}
 	m = ecalloc(1, sizeof(Monitor));
-	m->tagset[0] = m->tagset[1] = 1;
+	m->cl = cl;
+	m->tagset[0] = m->tagset[1] = (1<<i) & TAGMASK;
 	m->mfact = mfact;
 	m->nmaster = nmaster;
 	m->showbar = showbar;
@@ -854,7 +916,7 @@ detach(Client *c)
 {
 	Client **tc;
 
-	for (tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
+	for (tc = &c->mon->cl->clients; *tc && *tc != c; tc = &(*tc)->next);
 	*tc = c->next;
 }
 
@@ -863,11 +925,11 @@ detachstack(Client *c)
 {
 	Client **tc, *t;
 
-	for (tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
+	for (tc = &c->mon->cl->stack; *tc && *tc != c; tc = &(*tc)->snext);
 	*tc = c->snext;
 
 	if (c == c->mon->sel) {
-		for (t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
+		for (t = c->mon->cl->stack; t && !ISVISIBLE(t, c->mon); t = t->snext);
 		c->mon->sel = t;
 	}
 }
@@ -925,7 +987,7 @@ drawbar(Monitor *m)
 	}
 
 	resizebarwin(m);
-	for (c = m->clients; c; c = c->next) {
+	for (c = m->cl->clients; c; c = c->next) {
 		occ |= c->tags;
 		if (c->isurgent)
 			urg |= c->tags;
@@ -1003,8 +1065,8 @@ expose(XEvent *e)
 void
 focus(Client *c)
 {
-	if (!c || !ISVISIBLE(c))
-		for (c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
+	if (!c || !ISVISIBLE(c, selmon))
+		for (c = selmon->cl->stack; c && !ISVISIBLE(c, selmon); c = c->snext);
 	if (selmon->sel && selmon->sel != c)
 		unfocus(selmon->sel, 0);
 	if (c) {
@@ -1057,16 +1119,16 @@ focusstack(const Arg *arg)
 	if (!selmon->sel || (selmon->sel->isfullscreen && lockfullscreen))
 		return;
 	if (arg->i > 0) {
-		for (c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
+		for (c = selmon->sel->next; c && !ISVISIBLE(c, selmon); c = c->next);
 		if (!c)
-			for (c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
+			for (c = selmon->cl->clients; c && !ISVISIBLE(c, selmon); c = c->next);
 	} else {
-		for (i = selmon->clients; i != selmon->sel; i = i->next)
-			if (ISVISIBLE(i))
+		for (i = selmon->cl->clients; i != selmon->sel; i = i->next)
+			if (ISVISIBLE(i, selmon))
 				c = i;
 		if (!c)
 			for (; i; i = i->next)
-				if (ISVISIBLE(i))
+				if (ISVISIBLE(i, selmon))
 					c = i;
 	}
 	if (c) {
@@ -1404,12 +1466,12 @@ monocle(Monitor *m)
 	unsigned int n = 0;
 	Client *c;
 
-	for (c = m->clients; c; c = c->next)
-		if (ISVISIBLE(c))
+	for (c = m->cl->clients; c; c = c->next)
+		if (ISVISIBLE(c, m))
 			n++;
 	if (n > 0) /* override layout symbol */
 		snprintf(m->ltsymbol, sizeof m->ltsymbol, "[%d]", n);
-	for (c = nexttiled(m->clients); c; c = nexttiled(c->next))
+	for (c = nexttiled(m->cl->clients, m); c; c = nexttiled(c->next, m))
 		resize(c, m->wx, m->wy, m->ww - 2 * c->bw, m->wh - 2 * c->bw, 0);
 }
 
@@ -1491,9 +1553,9 @@ movemouse(const Arg *arg)
 }
 
 Client *
-nexttiled(Client *c)
+nexttiled(Client *c, Monitor *m)
 {
-	for (; c && (c->isfloating || !ISVISIBLE(c)); c = c->next);
+	for (; c && (c->isfloating || !ISVISIBLE(c, m)); c = c->next);
 	return c;
 }
 
@@ -1702,8 +1764,8 @@ restack(Monitor *m)
 	if (m->lt[m->sellt]->arrange) {
 		wc.stack_mode = Below;
 		wc.sibling = m->barwin;
-		for (c = m->stack; c; c = c->snext)
-			if (!c->isfloating && ISVISIBLE(c)) {
+		for (c = m->cl->stack; c; c = c->snext)
+			if (!c->isfloating && ISVISIBLE(c, m)) {
 				XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
 				wc.sibling = c->win;
 			}
@@ -1756,11 +1818,9 @@ sendmon(Client *c, Monitor *m)
 	if (c->mon == m)
 		return;
 	unfocus(c, 1);
-	detach(c);
 	detachstack(c);
 	c->mon = m;
 	c->tags = m->tagset[m->seltags]; /* assign tags of target monitor */
-	attach(c);
 	attachstack(c);
 	setclienttagprop(c);
 	focus(NULL);
@@ -1902,6 +1962,8 @@ setup(void)
 	screen = DefaultScreen(dpy);
 	sw = DisplayWidth(dpy, screen);
 	sh = DisplayHeight(dpy, screen);
+	if(!(cl = (Clientlist *)calloc(1, sizeof(Clientlist))))
+		die("fatal: could not malloc() %u bytes\n", sizeof(Clientlist));
 	root = RootWindow(dpy, screen);
 	drw = drw_create(dpy, screen, root, sw, sh);
 	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
@@ -1987,7 +2049,7 @@ showhide(Client *c)
 {
 	if (!c)
 		return;
-	if (ISVISIBLE(c)) {
+	if (ISVISIBLE(c, c->mon)) {
 		/* show clients top down */
 		XMoveWindow(dpy, c->win, c->x, c->y);
 		if ((!c->mon->lt[c->mon->sellt]->arrange || c->isfloating) && !c->isfullscreen)
@@ -2048,7 +2110,23 @@ void
 tag(const Arg *arg)
 {
 	Client *c;
+	Monitor *m;
+	unsigned int newtags;
 	if (selmon->sel && arg->ui & TAGMASK) {
+		newtags = arg->ui & TAGMASK;
+		for (m = mons; m; m = m->next)
+			/* if tag is visible on another monitor, move client to the new monitor */
+			if (m != selmon && m->tagset[m->seltags] & newtags) {
+				/* prevent moving client to all tags (MODKEY-Shift-0) when multiple monitors are connected */
+				if(newtags & selmon->tagset[selmon->seltags])
+					return;
+				selmon->sel->tags = newtags;
+				selmon->sel->mon = m;
+				arrange(m);
+				break;
+			}
+		/* workaround in case just one monitor is connected */
+
 		c = selmon->sel;
 		selmon->sel->tags = arg->ui & TAGMASK;
 		setclienttagprop(c);
@@ -2109,12 +2187,17 @@ togglefullscr(const Arg *arg)
 void
 toggletag(const Arg *arg)
 {
+	Monitor *m;
 	unsigned int newtags;
 
 	if (!selmon->sel)
 		return;
 	newtags = selmon->sel->tags ^ (arg->ui & TAGMASK);
 	if (newtags) {
+		/* prevent adding tags that are in use on other monitors */
+		for (m = mons; m; m = m->next)
+			if (m != selmon && newtags & m->tagset[m->seltags])
+				return;
 		selmon->sel->tags = newtags;
 		setclienttagprop(selmon->sel);
 		focus(NULL);
@@ -2125,12 +2208,25 @@ toggletag(const Arg *arg)
 void
 toggleview(const Arg *arg)
 {
+	Monitor *m;
 	unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
 
 	if (newtagset) {
+		/* prevent displaying the same tags on multiple monitors */
+		for(m = mons; m; m = m->next)
+			if(m != selmon && newtagset & m->tagset[m->seltags])
+				return;
 		selmon->tagset[selmon->seltags] = newtagset;
 		focus(NULL);
-		arrange(selmon);
+		attachclients(selmon);
+
+		unsigned int newtagset = selmon->tagset[selmon->seltags] ^ (arg->ui & TAGMASK);
+
+		if (newtagset) {
+			selmon->tagset[selmon->seltags] = newtagset;
+			focus(NULL);
+			arrange(selmon);
+		}
 	}
 }
 
@@ -2259,7 +2355,7 @@ updateclientlist()
 
 	XDeleteProperty(dpy, root, netatom[NetClientList]);
 	for (m = mons; m; m = m->next)
-		for (c = m->clients; c; c = c->next)
+		for (c = m->cl->clients; c; c = c->next)
 			XChangeProperty(dpy, root, netatom[NetClientList],
 				XA_WINDOW, 32, PropModeAppend,
 				(unsigned char *) &(c->win), 1);
@@ -2290,8 +2386,10 @@ updategeom(void)
 		/* new monitors if nn > n */
 		for (i = n; i < nn; i++) {
 			for (m = mons; m && m->next; m = m->next);
-			if (m)
+			if (m) {
 				m->next = createmon();
+				attachclients(m->next);
+			}
 			else
 				mons = createmon();
 		}
@@ -2311,16 +2409,13 @@ updategeom(void)
 		/* removed monitors if n > nn */
 		for (i = nn; i < n; i++) {
 			for (m = mons; m && m->next; m = m->next);
-			while ((c = m->clients)) {
-				dirty = 1;
-				m->clients = c->next;
-				detachstack(c);
-				c->mon = mons;
-				attach(c);
-				attachstack(c);
-			}
 			if (m == selmon)
 				selmon = mons;
+			for (c = m->cl->clients; c; c = c->next) {
+				dirty = True;
+				if (c->mon == m)
+					c->mon = selmon;
+			}
 			cleanupmon(m);
 		}
 		free(unique);
@@ -2590,13 +2685,31 @@ updatewmhints(Client *c)
 void
 view(const Arg *arg)
 {
+	Monitor *m;
+	unsigned int newtagset = selmon->tagset[selmon->seltags ^ 1];
 	if ((arg->ui & TAGMASK) == selmon->tagset[selmon->seltags])
 		return;
+	/* swap tags when trying to display a tag from another monitor */
+	if (arg->ui & TAGMASK)
+		newtagset = arg->ui & TAGMASK;
+	for (m = mons; m; m = m->next)
+		if (m != selmon && newtagset & m->tagset[m->seltags]) {
+			/* prevent displaying all tags (MODKEY-0) when multiple monitors
+			 * are connected */
+			if (newtagset & selmon->tagset[selmon->seltags])
+				return;
+			m->sel = selmon->sel;
+			m->seltags ^= 1;
+			m->tagset[m->seltags] = selmon->tagset[selmon->seltags];
+			attachclients(m);
+			arrange(m);
+			break;
+		}
 	selmon->seltags ^= 1; /* toggle sel tagset */
 	if (arg->ui & TAGMASK)
 		selmon->tagset[selmon->seltags] = arg->ui & TAGMASK;
 	focus(NULL);
-	arrange(selmon);
+	attachclients(selmon);
 }
 
 pid_t
@@ -2704,7 +2817,7 @@ termforwin(const Client *w)
 		return NULL;
 
 	for (m = mons; m; m = m->next) {
-		for (c = m->clients; c; c = c->next) {
+		for (c = m->cl->clients; c; c = c->next) {
 			if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
 				return c;
 		}
@@ -2720,7 +2833,7 @@ swallowingclient(Window w)
 	Monitor *m;
 
 	for (m = mons; m; m = m->next) {
-		for (c = m->clients; c; c = c->next) {
+		for (c = m->cl->clients; c; c = c->next) {
 			if (c->swallowing && c->swallowing->win == w)
 				return c;
 		}
@@ -2736,7 +2849,7 @@ wintoclient(Window w)
 	Monitor *m;
 
 	for (m = mons; m; m = m->next)
-		for (c = m->clients; c; c = c->next)
+		for (c = m->cl->clients; c; c = c->next)
 			if (c->win == w)
 				return c;
 	return NULL;
@@ -2828,7 +2941,7 @@ zoom(const Arg *arg)
 
 	if (!selmon->lt[selmon->sellt]->arrange || !c || c->isfloating)
 		return;
-	if (c == nexttiled(selmon->clients) && !(c = nexttiled(c->next)))
+	if (c == nexttiled(selmon->cl->clients, selmon) && !(c = nexttiled(c->next, selmon)))
 		return;
 	pop(c);
 }