suckless-patches / dwm-6.0-systray.diff

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Author: Jan Christoph Ebersbach <jceb@e-jc.de>, inspired by http://code.google.com/p/dwm-plus
URL: http://dwm.suckless.org/patches/systray
Implements a system tray for dwm.

diff --git a/config.def.h b/config.def.h
--- a/config.def.h
+++ b/config.def.h
@@ -8,10 +8,12 @@ static const char normfgcolor[]     = "#
 static const char selbordercolor[]  = "#005577";
 static const char selbgcolor[]      = "#005577";
 static const char selfgcolor[]      = "#eeeeee";
 static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 32;       /* snap pixel */
+static const unsigned int systrayspacing = 2;   /* systray spacing */
+static const Bool showsystray       = True;     /* False means no systray */
 static const Bool showbar           = True;     /* False means no bar */
 static const Bool topbar            = True;     /* False means bottom bar */
 static const Bool viewontag         = True;     /* Switch view on tag switch */
 
 /* tagging */
diff --git a/config.h b/config.h
--- a/config.h
+++ b/config.h
@@ -9,10 +9,12 @@ static const char selbordercolor[]  = "#
 static const char selbgcolor[]      = "#333333";
 static const char selfgcolor[]      = "#ffff00";
 static const char urgbordercolor[]  = "#ff0000";
 static const unsigned int borderpx  = 1;        /* border pixel of windows */
 static const unsigned int snap      = 4;        /* snap pixel */
+static const unsigned int systrayspacing = 2;   /* systray spacing */
+static const Bool showsystray       = True;     /* False means no systray */
 static const Bool showbar           = True;     /* False means no bar */
 static const Bool topbar            = True;     /* False means bottom bar */
 static const Bool viewontag         = True;     /* Switch view on tag switch */
 
 /* tagging */
diff --git a/dwm.c b/dwm.c
--- a/dwm.c
+++ b/dwm.c
@@ -55,16 +55,19 @@
 #define HEIGHT(X)               ((X)->h + 2 * (X)->bw)
 #define TAGMASK                 ((1 << LENGTH(tags)) - 1)
 #define TEXTW(X)                (textnw(X, strlen(X)) + dc.font.height)
 #define ISPANEL(X)              (ISVISIBLE(X) && (strcmp("panel", X->name) == 0))
 
+#define SYSTEM_TRAY_REQUEST_DOCK    0
+#define _NET_SYSTEM_TRAY_ORIENTATION_HORZ 0
+
 /* enums */
 enum { CurNormal, CurResize, CurMove, CurLast };        /* cursor */
 enum { ColBorder, ColFG, ColBG, ColLast };              /* color */
-enum { NetSupported, NetWMName, NetWMState,
-       NetWMFullscreen, NetActiveWindow, NetWMWindowType,
-       NetWMWindowTypeDialog, NetClientList, NetLast };     /* EWMH atoms */
+enum { NetSupported, NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation,
+       NetWMName, NetWMState, NetWMFullscreen, NetActiveWindow,
+       NetWMWindowType, NetWMWindowTypeDialog, NetClientList, NetLast };     /* EWMH atoms */
 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
 enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
        ClkClientWin, ClkRootWin, ClkLast };             /* clicks */
 
 typedef union {
@@ -155,10 +158,23 @@ typedef struct {
 	unsigned int tags;
 	Bool isfloating;
 	int monitor;
 } Rule;
 
+typedef struct SystrayIcon SystrayIcon;
+struct SystrayIcon {
+	Window win;
+	XRectangle geo;
+	SystrayIcon *next;
+};
+
+typedef struct Systray   Systray;
+struct Systray {
+	Window win;
+	SystrayIcon *icons;
+};
+
 /* function declarations */
 static void applyrules(Client *c);
 static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
 static void arrange(Monitor *m);
 static void arrangemon(Monitor *m);
@@ -191,10 +207,11 @@ static void focusin(XEvent *e);
 static void focusmon(const Arg *arg);
 static void focusstack(const Arg *arg);
 static unsigned long getcolor(const char *colstr);
 static Bool getrootptr(int *x, int *y);
 static long getstate(Window w);
+unsigned int getsystraywidth();
 static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
 static void grabbuttons(Client *c, Bool focused);
 static void grabkeys(void);
 static void incnmaster(const Arg *arg);
 static void initfont(const char *fontstr);
@@ -209,11 +226,13 @@ static void movemouse(const Arg *arg);
 static Client *nexttiled(Client *c);
 static void pop(Client *);
 static void propertynotify(XEvent *e);
 //static void quit(const Arg *arg);
 static Monitor *recttomon(int x, int y, int w, int h);
+static void removesystrayicon(SystrayIcon *i);
 static void resize(Client *c, int x, int y, int w, int h, Bool interact);
+static void resizebarwin(Monitor *m);
 static void resizeclient(Client *c, int x, int y, int w, int h);
 static void resizemouse(const Arg *arg);
 static void restack(Monitor *m);
 static void run(void);
 static void scan(void);
@@ -244,22 +263,26 @@ static void updatebarpos(Monitor *m);
 static void updatebars(void);
 static void updateclientlist(void);
 static void updatenumlockmask(void);
 static void updatesizehints(Client *c);
 static void updatestatus(void);
+static void updatesystray();
 static void updatewindowtype(Client *c);
 static void updatetitle(Client *c);
 static void updatewmhints(Client *c);
 static void view(const Arg *arg);
 static Client *wintoclient(Window w);
 static Monitor *wintomon(Window w);
+static SystrayIcon *wintosystrayicon(Window w);
 static int xerror(Display *dpy, XErrorEvent *ee);
 static int xerrordummy(Display *dpy, XErrorEvent *ee);
 static int xerrorstart(Display *dpy, XErrorEvent *ee);
 static void zoom(const Arg *arg);
 
 /* variables */
+static Systray *systray = NULL;
+static unsigned long systrayorientation = _NET_SYSTEM_TRAY_ORIENTATION_HORZ;
 static const char broken[] = "broken";
 static char stext[256];
 static int screen;
 static int sw, sh;           /* X display screen geometry width, height */
 static int bh, blw = 0;      /* bar geometry */
@@ -535,13 +558,41 @@ clearurgent(Client *c) {
 	XFree(wmh);
 }
 
 void
 clientmessage(XEvent *e) {
+	XWindowAttributes *wa;
 	XClientMessageEvent *cme = &e->xclient;
 	Client *c = wintoclient(cme->window);
+	SystrayIcon *i;
 
+	/* add systray icons */
+	if(cme->message_type == netatom[NetSystemTrayOP]) {
+		if(cme->data.l[1] == SYSTEM_TRAY_REQUEST_DOCK) {
+			if(!(i = (SystrayIcon *)calloc(1, sizeof(SystrayIcon))))
+				die("fatal: could not malloc() %u bytes\n", sizeof(SystrayIcon));
+			if(!(wa = (XWindowAttributes *)calloc(1, sizeof(XWindowAttributes))))
+				die("fatal: could not malloc() %u bytes\n", sizeof(XWindowAttributes));
+			i->win = cme->data.l[2];
+			i->next = systray->icons;
+			systray->icons = i;
+			/* deal with tray icons that have rectangle proportions */
+			XGetWindowAttributes(dpy, i->win, wa);
+			i->geo.height = bh;
+			if(wa->width == wa->height)
+				i->geo.width = bh;
+			else
+				i->geo.width = (int) (bh * (wa->width / wa->height));
+			XAddToSaveSet(dpy, i->win);
+			XSelectInput(dpy, i->win, StructureNotifyMask | ResizeRedirectMask
+					| PointerMotionMask | PointerMotionHintMask
+					| PropertyChangeMask| EnterWindowMask | FocusChangeMask);
+			XReparentWindow(dpy, i->win, systray->win, 0, 0);
+			XMapRaised(dpy, i->win);
+			updatesystray();
+		}
+	}
 	if(!c)
 		return;
 	if(cme->message_type == netatom[NetWMState]) {
 		if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
 			setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD    */
@@ -588,11 +639,11 @@ configurenotify(XEvent *e) {
 			if(dc.drawable != 0)
 				XFreePixmap(dpy, dc.drawable);
 			dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 			updatebars();
 			for(m = mons; m; m = m->next)
-				XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
+				resizebarwin(m);
 			focus(NULL);
 			arrange(NULL);
 		}
 	}
 }
@@ -668,14 +719,19 @@ createmon(void) {
 }
 
 void
 destroynotify(XEvent *e) {
 	Client *c;
+	SystrayIcon *i;
 	XDestroyWindowEvent *ev = &e->xdestroywindow;
 
 	if((c = wintoclient(ev->window)))
 		unmanage(c, True);
+	else if((i = wintosystrayicon(ev->window))) {
+		removesystrayicon(i);
+		updatesystray();
+	}
 }
 
 void
 detach(Client *c) {
 	Client **tc;
@@ -729,10 +785,11 @@ drawbar(Monitor *m) {
 	unsigned long *col;
 	unsigned int a= 0, s= 0;
 	char posbuf[10];
 	Client *c;
 
+	resizebarwin(m);
 	for(c = m->clients; c; c = c->next) {
 		occ |= c->tags;
 		if(c->isurgent)
 			urg |= c->tags;
 	}
@@ -762,10 +819,13 @@ drawbar(Monitor *m) {
 	}
 	
 	if(m == selmon) { /* status is only drawn on selected monitor */
 		dc.w = TEXTW(stext);
 		dc.x = m->ww - dc.w;
+		if(showsystray && m == selmon) {
+			dc.x -= getsystraywidth();
+		}
 		if(dc.x < x) {
 			dc.x = x;
 			dc.w = m->ww - x;
 		}
 		drawtext(stext, dc.norm, False);
@@ -883,10 +943,11 @@ focus(Client *c) {
 		XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 		XDeleteProperty(dpy, root, netatom[NetActiveWindow]);
 	}
 	selmon->sel = c;
 	drawbars();
+	updatesystray();
 }
 
 void
 focusatomchange() {
 	int format, status;
@@ -1011,10 +1072,18 @@ getstate(Window w) {
 		result = *p;
 	XFree(p);
 	return result;
 }
 
+unsigned int
+getsystraywidth() {
+	unsigned int w = 0;
+	SystrayIcon *i;
+	for(i = systray->icons; i; w += i->geo.width + systrayspacing, i = i->next) ;
+	return w;
+}
+
 Bool
 gettextprop(Window w, Atom atom, char *text, unsigned int size) {
 	char **list = NULL;
 	int n;
 	XTextProperty name;
@@ -1231,10 +1300,14 @@ mappingnotify(XEvent *e) {
 
 void
 maprequest(XEvent *e) {
 	static XWindowAttributes wa;
 	XMapRequestEvent *ev = &e->xmaprequest;
+	SystrayIcon *i;
+	if((i = wintosystrayicon(ev->window))) {
+		updatesystray();
+	}
 
 	if(!XGetWindowAttributes(dpy, ev->window, &wa))
 		return;
 	if(wa.override_redirect)
 		return;
@@ -1344,13 +1417,18 @@ pop(Client *c) {
 }
 
 void
 propertynotify(XEvent *e) {
 	Client *c;
+	SystrayIcon *i;
 	Window trans;
 	XPropertyEvent *ev = &e->xproperty;
 
+	if((i = wintosystrayicon(ev->window))) {
+		/* TODO include XEMBED functionality from systray_state */
+		updatesystray();
+	}
 	if((ev->window == root) && (ev->atom == XA_WM_NAME))
 		updatestatus();
 	else if((ev->window == root) && (ev->atom == focusatom))
 		focusatomchange();
 	else if(ev->state == PropertyDelete)
@@ -1398,16 +1476,36 @@ recttomon(int x, int y, int w, int h) {
 		}
 	return r;
 }
 
 void
+removesystrayicon(SystrayIcon *i) {
+	SystrayIcon **ii;
+
+	if(!i || !showsystray)
+		return;
+	for(ii = &systray->icons; *ii && *ii != i; ii = &(*ii)->next);
+	*ii = i->next;
+	free(i);
+}
+
+
+void
 resize(Client *c, int x, int y, int w, int h, Bool interact) {
 	if(applysizehints(c, &x, &y, &w, &h, interact))
 		resizeclient(c, x, y, w, h);
 }
 
 void
+resizebarwin(Monitor *m) {
+	unsigned int w = m->ww;
+	if(showsystray && m == selmon)
+		w -= getsystraywidth();
+	XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, w, bh);
+}
+
+void
 resizeclient(Client *c, int x, int y, int w, int h) {
 	XWindowChanges wc;
 
 	c->oldx = c->x; c->x = wc.x = x;
 	c->oldy = c->y; c->y = wc.y = y;
@@ -1666,10 +1764,13 @@ setup(void) {
 	wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
 	wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
 	wmatom[WMTakeFocus] = XInternAtom(dpy, "WM_TAKE_FOCUS", False);
 	netatom[NetActiveWindow] = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
 	netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
+	netatom[NetSystemTray] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_S0", False);
+	netatom[NetSystemTrayOP] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_OPCODE", False);
+	netatom[NetSystemTrayOrientation] = XInternAtom(dpy, "_NET_SYSTEM_TRAY_ORIENTATION", False);
 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
 	netatom[NetWMFullscreen] = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
 	netatom[NetWMWindowType] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
 	netatom[NetWMWindowTypeDialog] = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
@@ -1692,10 +1793,12 @@ setup(void) {
 	dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen));
 	dc.gc = XCreateGC(dpy, root, 0, NULL);
 	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 	if(!dc.font.set)
 		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
+	/* init system tray */
+	updatesystray();
 	/* init bars */
 	updatebars();
 	updatestatus();
 	/* EWMH support per view */
 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
@@ -1803,12 +1906,22 @@ tile(Monitor *m) {
 
 void
 togglebar(const Arg *arg) {
 	selmon->showbar = !selmon->showbar;
 	updatebarpos(selmon);
-	XMoveResizeWindow(dpy, selmon->barwin, selmon->wx, selmon->by, selmon->ww, bh);
 	arrange(selmon);
+	if(showsystray) {
+		XWindowChanges wc;
+		if(!selmon->showbar)
+			wc.y = -bh;
+		else if(selmon->showbar) {
+			wc.y = 0;
+			if(!selmon->topbar)
+				wc.y = selmon->mh - bh;
+		}
+		XConfigureWindow(dpy, systray->win, CWY, &wc);
+	}
 }
 
 void
 togglefloating(const Arg *arg) {
 	if(!selmon->sel)
@@ -1885,32 +1998,41 @@ unmanage(Client *c, Bool destroyed) {
 }
 
 void
 unmapnotify(XEvent *e) {
 	Client *c;
+	SystrayIcon *i;
 	XUnmapEvent *ev = &e->xunmap;
 
 	if((c = wintoclient(ev->window))) {
 		if(ev->send_event)
 			setclientstate(c, WithdrawnState);
 		else
 			unmanage(c, False);
+	} else if((i = wintosystrayicon(ev->window))) {
+		removesystrayicon(i);
+		updatesystray();
 	}
 }
 
 void
 updatebars(void) {
+	unsigned int w;
 	Monitor *m;
+
 	XSetWindowAttributes wa = {
 		.override_redirect = True,
 		.background_pixmap = ParentRelative,
 		.event_mask = ButtonPressMask|ExposureMask
 	};
 	for(m = mons; m; m = m->next) {
 		if (m->barwin)
 			continue;
-		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, m->ww, bh, 0, DefaultDepth(dpy, screen),
+		w = m->ww;
+		if(showsystray && m == selmon)
+			w -= getsystraywidth();
+		m->barwin = XCreateWindow(dpy, root, m->wx, m->by, w, bh, 0, DefaultDepth(dpy, screen),
 		                          CopyFromParent, DefaultVisual(dpy, screen),
 		                          CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
 		XDefineCursor(dpy, m->barwin, cursor[CurNormal]);
 		XMapRaised(dpy, m->barwin);
 	}
@@ -2103,10 +2225,63 @@ updatestatus(void) {
 		strcpy(stext, "dwm-"VERSION);
 	drawbar(selmon);
 }
 
 void
+updatesystray(void) {
+	XSetWindowAttributes wa;
+	XEvent event;
+	SystrayIcon *i;
+	unsigned int x = selmon->mx + selmon->mw;
+	unsigned int w = 1;
+
+	if(!showsystray)
+		return;
+	if(!systray) {
+		/* init systray */
+		if(!(systray = (Systray *)calloc(1, sizeof(Systray))))
+			die("fatal: could not malloc() %u bytes\n", sizeof(Systray));
+		systray->win = XCreateSimpleWindow(dpy, root, x, selmon->by, w, bh, 0, 0, dc.norm[ColBG]);
+		wa.event_mask        = ButtonPressMask | ExposureMask;
+		wa.override_redirect = True;
+		wa.background_pixmap = ParentRelative;
+		wa.background_pixel  = dc.norm[ColBG];
+		XSelectInput(dpy, systray->win, SubstructureNotifyMask | SubstructureRedirectMask
+				| PointerMotionMask | PointerMotionHintMask | KeyPressMask | ButtonPressMask);
+		XChangeProperty(dpy, systray->win, netatom[NetSystemTrayOrientation], XA_CARDINAL, 32,
+				PropModeReplace, (unsigned char *)&systrayorientation, 1);
+		XChangeWindowAttributes(dpy, systray->win, CWEventMask | CWOverrideRedirect | CWBackPixel, &wa);
+		memset(&wa, 0, sizeof(XWindowAttributes));
+		XMapRaised(dpy, systray->win);
+		XSetSelectionOwner(dpy, netatom[NetSystemTray], systray->win, CurrentTime);
+		if(XGetSelectionOwner(dpy, netatom[NetSystemTray]) != systray->win)
+			fprintf(stderr, "dwm: unable to obtain system tray.\n");
+		else {
+			memset(&event, 0, sizeof(event));
+			event.xclient.type = ClientMessage;
+			event.xclient.window = root;
+			event.xclient.message_type = XInternAtom(dpy, "MANAGER", False);
+			event.xclient.format = 32;
+			event.xclient.data.l[0] = CurrentTime;
+			event.xclient.data.l[1] = netatom[NetSystemTray];
+			event.xclient.data.l[2] = systray->win;
+			event.xclient.data.l[3] = 0;
+			event.xclient.data.l[4] = 0;
+			XSendEvent(dpy, root, False, StructureNotifyMask, &event);
+			XSync(dpy, False);
+		}
+	}
+	for(i = systray->icons; i; i = i->next) {
+		XMapWindow(dpy, i->win);
+		XMoveResizeWindow(dpy, i->win, (i->geo.x = w), 0, i->geo.width, i->geo.height);
+		w += i->geo.width + systrayspacing;
+	}
+	x -= w;
+	XMoveResizeWindow(dpy, systray->win, x, selmon->by, w, bh);
+}
+
+void
 updatewindowtype(Client *c) {
 	Atom state = getatomprop(c, netatom[NetWMState]);
 	Atom wtype = getatomprop(c, netatom[NetWMWindowType]);
 
 	if(state == netatom[NetWMFullscreen])
@@ -2174,10 +2349,20 @@ wintomon(Window w) {
 	if((c = wintoclient(w)))
 		return c->mon;
 	return selmon;
 }
 
+SystrayIcon *
+wintosystrayicon(Window w) {
+	SystrayIcon *i = NULL;
+
+	if(!w)
+		return i;
+	for(i = systray->icons; i && i->win != w; i = i->next) ;
+	return i;
+}
+
 /* There's no way to check accesses to destroyed windows, thus those cases are
  * ignored (especially on UnmapNotify's).  Other types of errors call Xlibs
  * default error handler, which may call exit.  */
 int
 xerror(Display *dpy, XErrorEvent *ee) {
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