/* see license for copyright and license */ #include #include #include #include #include #include #include #include #include #include #include #include #define LENGTH(x) (sizeof(x)/sizeof(*x)) #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask)) #define BUTTONMASK ButtonPressMask|ButtonReleaseMask #define ISFFT(c) (c->isfull || c->isfloat || c->istrans) enum { RESIZE, MOVE }; enum { TILE, MONOCLE, BSTACK, GRID, FLOAT, MODES }; enum { WM_PROTOCOLS, WM_DELETE_WINDOW, WM_COUNT }; enum { NET_SUPPORTED, NET_FULLSCREEN, NET_WM_STATE, NET_ACTIVE, NET_COUNT }; /* argument structure to be passed to function by config.h * com - function pointer ~ the command to run * i - an integer to indicate different states * v - any type argument */ typedef union { const char** com; const int i; const void *v; } Arg; /* a key struct represents a combination of * mod - a modifier mask * keysym - and the key pressed * func - the function to be triggered because of the above combo * arg - the argument to the function */ typedef struct { unsigned int mod; KeySym keysym; void (*func)(const Arg *); const Arg arg; } Key; /* a button struct represents a combination of * mask - a modifier mask * button - and the mouse button pressed * func - the function to be triggered because of the above combo * arg - the argument to the function */ typedef struct { unsigned int mask, button; void (*func)(const Arg *); const Arg arg; } Button; /* a client is a wrapper to a window that additionally * holds some properties for that window * * next - the client after this one, or NULL if the current is the last client * isurgn - set when the window received an urgent hint * isfull - set when the window is fullscreen * isfloat - set when the window is floating * istrans - set when the window is transient * win - the window this client is representing * * istrans is separate from isfloat as floating windows can be reset to * their tiling positions, while the transients will always be floating */ typedef struct Client { struct Client *next; Bool isurgn, isfull, isfloat, istrans; Window win; } Client; /* properties of each desktop * mode - the desktop's tiling layout mode * head - the start of the client list * curr - the currently highlighted window * prev - the client that previously had focus */ typedef struct { int mode; Client *head, *curr, *prev; } Desktop; /* define behavior of certain applications * configured in config.h * class - the class or name of the instance * desktop - what desktop it should be spawned at * follow - whether to change desktop focus to the specified desktop */ typedef struct { const char *class; const int desktop; const Bool follow, floating; } AppRule; /* function prototypes sorted alphabetically */ static Client* addwindow(Window w, Desktop *d); static void buttonpress(XEvent *e); static void change_desktop(const Arg *arg); static void cleanup(void); static void client_to_desktop(const Arg *arg); static void clientmessage(XEvent *e); static void configurerequest(XEvent *e); static void deletewindow(Window w); static void desktopinfo(void); static void destroynotify(XEvent *e); static void enternotify(XEvent *e); static void focus(Client *c, Desktop *d); static void focusin(XEvent *e); static unsigned long getcolor(const char* color, const int screen); static void grabbuttons(Client *c); static void grabkeys(void); static void grid(int h, int y, Desktop *d); static void keypress(XEvent *e); static void killclient(); static void maprequest(XEvent *e); static void monocle(int h, int y, Desktop *d); static void move_down(); static void move_up(); static void moveresize(const Arg *arg); static void mousemotion(const Arg *arg); static void next_win(); static Client* prevclient(Client *c, Desktop *d); static void prev_win(); static void propertynotify(XEvent *e); static void quit(); static void removeclient(Client *c, Desktop *d); static void run(void); static void setfullscreen(Client *c, Desktop *d, Bool fullscrn); static void setup(void); static void sigchld(int sig); static void spawn(const Arg *arg); static void stack(int h, int y, Desktop *d); static void swap_master(); static void switch_mode(const Arg *arg); static void tile(Desktop *d); static void unmapnotify(XEvent *e); static Bool wintoclient(Window w, Client **c, Desktop **d); static int xerror(Display *dis, XErrorEvent *ee); static int xerrorstart(Display *dis, XErrorEvent *ee); #include "config.h" static Bool running = True; static int wh, ww, currdeskidx = 0; static unsigned int numlockmask = 0, win_unfocus, win_focus; static Display *dis; static Window root; static Atom wmatoms[WM_COUNT], netatoms[NET_COUNT]; static Desktop desktops[DESKTOPS]; /* events array - on new event, call the appropriate handling function */ static void (*events[LASTEvent])(XEvent *e) = { [KeyPress] = keypress, [EnterNotify] = enternotify, [MapRequest] = maprequest, [ClientMessage] = clientmessage, [ButtonPress] = buttonpress, [DestroyNotify] = destroynotify, [UnmapNotify] = unmapnotify, [PropertyNotify] = propertynotify, [ConfigureRequest] = configurerequest, [FocusIn] = focusin, }; /* layout array - given the current layout mode, tile the windows * h (or hh) - avaible height that windows have to expand * y (or cy) - offset from top to place the windows (reserved by the panel) */ static void (*layout[MODES])(int h, int y, Desktop *d) = { [TILE] = stack, [BSTACK] = stack, [GRID] = grid, [MONOCLE] = monocle, }; /* create a new client and add the new window * window should notify of property change events */ Client* addwindow(Window w, Desktop *d) { Client *c = NULL, *t = prevclient(d->head, d); if (!(c = (Client *)calloc(1, sizeof(Client)))) err(EXIT_FAILURE, "cannot allocate client"); if (!d->head) d->head = d->curr = c; else if (!ATTACH_ASIDE) { c->next = d->head; d->head = c; } else if (t) t->next = c; else d->head->next = c; XSelectInput(dis, (c->win = w), PropertyChangeMask|FocusChangeMask|(FOLLOW_MOUSE?EnterWindowMask:0)); return c; } /* on the press of a button check to see if there's a binded function to call */ void buttonpress(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (!wintoclient(e->xbutton.window, &c, &d)) return; if (CLICK_TO_FOCUS && d->curr != c && e->xbutton.button == Button1) focus(c, d); for (unsigned int i = 0; i < LENGTH(buttons); i++) if (CLEANMASK(buttons[i].mask) == CLEANMASK(e->xbutton.state) && buttons[i].button == e->xbutton.button) { if (d->curr != c) focus(c, d); if (buttons[i].func) buttons[i].func(&(buttons[i].arg)); } } /* focus another desktop * * to avoid flickering * first map the new windows * first the current window and then all other * then unmap the old windows * first all others then the current */ void change_desktop(const Arg *arg) { if (arg->i == currdeskidx || arg->i < 0 || arg->i >= DESKTOPS) return; Desktop *d = &desktops[currdeskidx], *n = &desktops[(currdeskidx = arg->i)]; if (n->curr) XMapWindow(dis, n->curr->win); for (Client *c = n->head; c; c = c->next) XMapWindow(dis, c->win); for (Client *c = d->head; c; c = c->next) if (c != d->curr) XUnmapWindow(dis, c->win); if (d->curr) XUnmapWindow(dis, d->curr->win); if (n->head) { tile(n); focus(n->curr, n); } desktopinfo(); } /* remove all windows in all desktops by sending a delete message */ void cleanup(void) { Window root_return, parent_return, *children; unsigned int nchildren; XUngrabKey(dis, AnyKey, AnyModifier, root); XQueryTree(dis, root, &root_return, &parent_return, &children, &nchildren); for (unsigned int i = 0; i < nchildren; i++) deletewindow(children[i]); if (children) XFree(children); XSync(dis, False); } /* move a client to another desktop * * add the current client as the last on the new desktop * and then remove it from the current desktop */ void client_to_desktop(const Arg *arg) { if (arg->i == currdeskidx || arg->i < 0 || arg->i >= DESKTOPS || !desktops[currdeskidx].curr) return; Desktop *d = &desktops[currdeskidx], *n = &desktops[arg->i]; Client *p = prevclient(d->curr, d), *l = prevclient(n->head, n); focus(l ? (l->next = d->curr):n->head ? (n->head->next = d->curr):(n->head = d->curr), n); if (d->curr == d->head || !p) d->head = d->curr->next; else p->next = d->curr->next; d->curr->next = NULL; XUnmapWindow(dis, d->curr->win); focus(d->prev, d); if (FOLLOW_WINDOW) change_desktop(arg); else if (!(n->curr->isfloat || n->curr->istrans) || (d->head && !d->head->next)) tile(d); desktopinfo(); } /* To change the state of a mapped window, a client MUST * send a _NET_WM_STATE client message to the root window * message_type must be _NET_WM_STATE * data.l[0] is the action to be taken * data.l[1] is the property to alter three actions: * - remove/unset _NET_WM_STATE_REMOVE=0 * - add/set _NET_WM_STATE_ADD=1, * - toggle _NET_WM_STATE_TOGGLE=2 * * check if window requested fullscreen or activation */ void clientmessage(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (!wintoclient(e->xclient.window, &c, &d)) return; if (e->xclient.message_type == netatoms[NET_WM_STATE] && ( (unsigned)e->xclient.data.l[1] == netatoms[NET_FULLSCREEN] || (unsigned)e->xclient.data.l[2] == netatoms[NET_FULLSCREEN])) { setfullscreen(c, d, (e->xclient.data.l[0] == 1 || (e->xclient.data.l[0] == 2 && !c->isfull))); if (!(c->isfloat || c->istrans) || !d->head->next) tile(d); } else if (e->xclient.message_type == netatoms[NET_ACTIVE]) focus(c, d); } /* a configure request means that the window requested changes in its geometry * state. if the window is fullscreen discard and fill the screen else set the * appropriate values as requested, and tile the window again so that it fills * the gaps that otherwise could have been created */ void configurerequest(XEvent *e) { XConfigureRequestEvent *ev = &e->xconfigurerequest; XWindowChanges wc = { ev->x, ev->y, ev->width, ev->height, ev->border_width, ev->above, ev->detail }; XConfigureWindow(dis, ev->window, ev->value_mask, &wc); XSync(dis, False); tile(&desktops[currdeskidx]); } /* close the window */ void deletewindow(Window w) { XEvent ev = { .type = ClientMessage }; ev.xclient.window = w; ev.xclient.format = 32; ev.xclient.message_type = wmatoms[WM_PROTOCOLS]; ev.xclient.data.l[0] = wmatoms[WM_DELETE_WINDOW]; ev.xclient.data.l[1] = CurrentTime; XSendEvent(dis, w, False, NoEventMask, &ev); } /* output info about the desktops on standard output stream * * the info is a list of ':' separated values for each desktop * desktop to desktop info is separated by ' ' single spaces * the info values are * the desktop number/id * the desktop's client count * the desktop's tiling layout mode/id * whether the desktop is the current focused (1) or not (0) * whether any client in that desktop has received an urgent hint * * once the info is collected, immediately flush the stream */ void desktopinfo(void) { Desktop *d = NULL; Client *c = NULL; Bool urgent = False; for (int w = 0, i = 0; i < DESKTOPS; i++, w = 0, urgent = False) { for (d = &desktops[i], c = d->head; c; urgent |= c->isurgn, ++w, c = c->next); printf("%d:%d:%d:%d:%d%c", i, w, d->mode, i == currdeskidx, urgent, i == DESKTOPS-1 ? '\n':' '); } fflush(stdout); } /* a destroy notification is received when a window is being closed * on receival, remove the appropriate client that held that window */ void destroynotify(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (wintoclient(e->xdestroywindow.window, &c, &d)) { removeclient(c, d); desktopinfo(); } } /* when the mouse enters a window's borders * the window, if notifying of such events (EnterWindowMask) * will notify the wm and will get focus */ void enternotify(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (FOLLOW_MOUSE && wintoclient(e->xcrossing.window, &c, &d) && e->xcrossing.mode == NotifyNormal && e->xcrossing.detail != NotifyInferior && e->xcrossing.window != d->curr->win) focus(c, d); } /* highlight borders and set active window and input focus * if given current is NULL then delete the active window property * * stack order by client properties, top to bottom: * - current when floating or transient * - floating or trancient windows * - current when tiled * - current when fullscreen * - fullscreen windows * - tiled windows * * a window should have borders in any case, except if * - the window is the only window on screen * - the window is fullscreen * - the mode is MONOCLE and the window is not floating or transient * * finally button events are grabbed for the new client. There * is no need for button events to be grabbed again, except if * CLICK_TO_FOCUS is set, in which case the grabbing of Button1 * must be updated, so Button1 clicks are available to the * active window / current client. * this is a compromise. we could grab the buttons for the new * client on maprequest(), but since we will be calling this * function anyway, we can just grab the buttons for the current * client that may be the new client. */ void focus(Client *c, Desktop *d) { if (!d->head) { XDeleteProperty(dis, root, netatoms[NET_ACTIVE]); d->curr = d->prev = NULL; return; } else if (c == d->prev) { d->prev = prevclient((d->curr = d->prev) ? d->prev:d->head, d); } else if (c != d->curr) { d->prev = d->curr; d->curr = c; } /* num of n:all fl:fullscreen ft:floating/transient windows */ int n = 0, fl = 0, ft = 0; for (c = d->head; c; c = c->next, ++n) if (ISFFT(c)) { fl++; if (!c->isfull) ft++; } Window w[n]; w[(d->curr->isfloat || d->curr->istrans) ? 0:ft] = d->curr->win; for (fl += !ISFFT(d->curr) ? 1:0, c = d->head; c; c = c->next) { XSetWindowBorder(dis, c->win, c == d->curr ? win_focus:win_unfocus); XSetWindowBorderWidth(dis, c->win, (!d->head->next || c->isfull || (d->mode == MONOCLE && !ISFFT(c))) ? 0:BORDER_WIDTH); if (c != d->curr) w[c->isfull ? --fl:ISFFT(c) ? --ft:--n] = c->win; if (CLICK_TO_FOCUS || c == d->curr) grabbuttons(c); } XRestackWindows(dis, w, LENGTH(w)); XSetInputFocus(dis, d->curr->win, RevertToPointerRoot, CurrentTime); XChangeProperty(dis, root, netatoms[NET_ACTIVE], XA_WINDOW, 32, PropModeReplace, (unsigned char *)&d->curr->win, 1); XSync(dis, False); } /* dont give focus to any client except current * some apps explicitly call XSetInputFocus suchs * as tabbed and chromium, resulting in loss of * input (mouse/kbd) focus from the current and * highlighted client - this gives focus back */ void focusin(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (!wintoclient(e->xfocus.window, &c, &d)) return; else if (d->curr && e->xfocus.window != d->curr->win) focus(d->curr, d); } /* get a pixel with the requested color * to fill some window area - borders */ unsigned long getcolor(const char* color, const int screen) { XColor c; Colormap map = DefaultColormap(dis, screen); if (!XAllocNamedColor(dis, map, color, &c, &c)) err(EXIT_FAILURE, "cannot allocate color"); return c.pixel; } /* set the given client to listen to button events (presses / releases) */ void grabbuttons(Client *c) { unsigned int b, m, modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask }; if (CLICK_TO_FOCUS) for (m = 0; m < LENGTH(modifiers); m++) if (c != desktops[currdeskidx].curr) XGrabButton(dis, Button1, modifiers[m], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeAsync, None, None); else XUngrabButton(dis, Button1, modifiers[m], c->win); for (b = 0, m = 0; b < LENGTH(buttons); b++, m = 0) while (m < LENGTH(modifiers)) XGrabButton(dis, buttons[b].button, buttons[b].mask|modifiers[m++], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeAsync, None, None); } /* the wm should listen to key presses */ void grabkeys(void) { KeyCode code; XUngrabKey(dis, AnyKey, AnyModifier, root); unsigned int k, m, modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask }; for (k = 0, m = 0; k < LENGTH(keys); k++, m = 0) while ((code = XKeysymToKeycode(dis, keys[k].keysym)) && m < LENGTH(modifiers)) XGrabKey(dis, code, keys[k].mod|modifiers[m++], root, True, GrabModeAsync, GrabModeAsync); } /* arrange windows in a grid */ void grid(int hh, int cy, Desktop *d) { int n = 0, cols = 0, cn = 0, rn = 0, i = -1; for (Client *c = d->head; c; c = c->next) if (!ISFFT(c)) ++n; for (cols = 0; cols <= n/2; cols++) if (cols*cols >= n) break; /* emulate square root */ if (n == 0) return; else if (n == 5) cols = 2; int rows = n/cols, ch = hh - BORDER_WIDTH, cw = (ww - BORDER_WIDTH)/(cols ? cols:1); for (Client *c = d->head; c; c = c->next) { if (ISFFT(c)) continue; else ++i; if (i/rows + 1 > cols - n%cols) rows = n/cols + 1; XMoveResizeWindow(dis, c->win, cn*cw, cy + rn*ch/rows, cw - BORDER_WIDTH, ch/rows - BORDER_WIDTH); if (++rn >= rows) { rn = 0; cn++; } } } /* on the press of a key check to see if there's a binded function to call */ void keypress(XEvent *e) { KeySym keysym = XkbKeycodeToKeysym(dis, e->xkey.keycode, 0, 0); for (unsigned int i = 0; i < LENGTH(keys); i++) if (keysym == keys[i].keysym && CLEANMASK(keys[i].mod) == CLEANMASK(e->xkey.state)) if (keys[i].func) keys[i].func(&keys[i].arg); } /* explicitly kill a client - close the highlighted window * send a delete message and remove the client */ void killclient(void) { Desktop *d = &desktops[currdeskidx]; if (!d->curr) return; Atom *prot; int n = -1; if (XGetWMProtocols(dis, d->curr->win, &prot, &n)) while(--n >= 0 && prot[n] != wmatoms[WM_DELETE_WINDOW]); if (n < 0) { XKillClient(dis, d->curr->win); removeclient(d->curr, d); } else deletewindow(d->curr->win); } /* a map request is received when a window wants to display itself * if the window has override_redirect flag set then it should not be handled * by the wm. if the window already has a client then there is nothing to do. * * match window class and/or install name against an app rule. * create a new client for the window and add it to the appropriate desktop * set the floating, transient and fullscreen state of the client * if the desktop in which the window is to be spawned is the current desktop * then display/map the window, else, if follow is set, focus the new desktop. */ void maprequest(XEvent *e) { Desktop *d = NULL; Client *c = NULL; XWindowAttributes wa; Window w; if (XGetWindowAttributes(dis, e->xmaprequest.window, &wa) && wa.override_redirect) return; if (wintoclient(e->xmaprequest.window, &c, &d)) return; Bool follow = False, floating = False; int newdsk = currdeskidx; XClassHint ch = {0, 0}; if (XGetClassHint(dis, e->xmaprequest.window, &ch)) for (unsigned int i = 0; i < LENGTH(rules); i++) if (strstr(ch.res_class, rules[i].class) || strstr(ch.res_name, rules[i].class)) { if (rules[i].desktop >= 0) newdsk = rules[i].desktop; follow = rules[i].follow; floating = rules[i].floating; break; } if (ch.res_class) XFree(ch.res_class); if (ch.res_name) XFree(ch.res_name); c = addwindow(e->xmaprequest.window, (d = &desktops[newdsk])); c->istrans = XGetTransientForHint(dis, c->win, &w); if ((c->isfloat = (floating || d->mode == FLOAT)) && !c->istrans) XMoveWindow(dis, c->win, (ww - wa.width)/2, (wh - wa.height)/2); int di; unsigned long dl; unsigned char *state = NULL; Atom da; if (XGetWindowProperty(dis, c->win, netatoms[NET_WM_STATE], 0L, sizeof da, False, XA_ATOM, &da, &di, &dl, &dl, &state) == Success && state) setfullscreen(c, d, (*(Atom *)state == netatoms[NET_FULLSCREEN])); if (state) XFree(state); if (currdeskidx == newdsk) { if (!ISFFT(c)) tile(d); XMapWindow(dis, c->win); } else if (follow) change_desktop(&(Arg){.i = newdsk}); focus(c, d); desktopinfo(); } /* grab the pointer and get it's current position * all pointer movement events will be reported until it's ungrabbed * until the mouse button has not been released, * grab the interesting events - button press/release and pointer motion * and on on pointer movement resize or move the window under the curson. * if the received event is a map request or a configure request call the * appropriate handler, and stop listening for other events. * Ungrab the poitner and event handling is passed back to run() function. * Once a window has been moved or resized, it's marked as floating. */ void mousemotion(const Arg *arg) { Desktop *d = &desktops[currdeskidx]; XWindowAttributes wa; XEvent ev; if (!d->curr || !XGetWindowAttributes(dis, d->curr->win, &wa)) return; if (XGrabPointer(dis, root, False, BUTTONMASK|PointerMotionMask, GrabModeAsync, GrabModeAsync, None, None, CurrentTime) != GrabSuccess) return; if (arg->i == RESIZE) XWarpPointer(dis, None, d->curr->win, 0, 0, 0, 0, wa.width, wa.height); int rx, ry, c, xw, yh; unsigned int m; Window w; XQueryPointer(dis, root, &w, &w, &rx, &ry, &c, &c, &m); if (!d->curr->isfloat && !d->curr->istrans) { d->curr->isfloat = True; tile(d); focus(d->curr, d); } do { XMaskEvent(dis, BUTTONMASK|PointerMotionMask|SubstructureRedirectMask, &ev); if (ev.type == MotionNotify) { xw = (arg->i == MOVE ? wa.x:wa.width) + ev.xmotion.x - rx; yh = (arg->i == MOVE ? wa.y:wa.height) + ev.xmotion.y - ry; if (arg->i == RESIZE) XResizeWindow(dis, d->curr->win, xw > MINWSZ ? xw:wa.width, yh > MINWSZ ? yh:wa.height); else if (arg->i == MOVE) XMoveWindow(dis, d->curr->win, xw, yh); } else if (ev.type == ConfigureRequest || ev.type == MapRequest) events[ev.type](&ev); } while (ev.type != ButtonRelease); XUngrabPointer(dis, CurrentTime); } /* each window should cover all the available screen space */ void monocle(int hh, int cy, Desktop *d) { for (Client *c = d->head; c; c = c->next) if (!ISFFT(c)) XMoveResizeWindow(dis, c->win, 0, cy, ww, hh); } /* move the current client, to current->next * and current->next to current client's position */ void move_down(void) { Desktop *d = &desktops[currdeskidx]; if (!d->curr || !d->head->next) return; /* p is previous, c is current, n is next, if current is head n is last */ Client *p = prevclient(d->curr, d), *n = (d->curr->next) ? d->curr->next:d->head; /* * if c is head, swapping with n should update head to n * [c]->[n]->.. ==> [n]->[c]->.. * ^head ^head * * else there is a previous client and p->next should be what's after c * ..->[p]->[c]->[n]->.. ==> ..->[p]->[n]->[c]->.. */ if (d->curr == d->head) d->head = n; else p->next = d->curr->next; /* * if c is the last client, c will be the current head * [n]->..->[p]->[c]->NULL ==> [c]->[n]->..->[p]->NULL * ^head ^head * else c will take the place of n, so c-next will be n->next * ..->[p]->[c]->[n]->.. ==> ..->[p]->[n]->[c]->.. */ d->curr->next = (d->curr->next) ? n->next:n; /* * if c was swapped with n then they now point to the same ->next. n->next should be c * ..->[p]->[c]->[n]->.. ==> ..->[p]->[n]->.. ==> ..->[p]->[n]->[c]->.. * [c]-^ * * else c is the last client and n is head, * so c will be move to be head, no need to update n->next * [n]->..->[p]->[c]->NULL ==> [c]->[n]->..->[p]->NULL * ^head ^head */ if (d->curr->next == n->next) n->next = d->curr; else d->head = d->curr; if (!d->curr->isfloat && !d->curr->istrans) tile(d); } /* move the current client, to the previous from current and * the previous from current to current client's position */ void move_up(void) { Desktop *d = &desktops[currdeskidx]; if (!d->curr || !d->head->next) return; /* p is previous from current or last if current is head */ Client *pp = NULL, *p = prevclient(d->curr, d); /* pp is previous from p, or null if current is head and thus p is last */ if (p->next) for (pp = d->head; pp && pp->next != p; pp = pp->next); /* * if p has a previous client then the next client should be current (current is c) * ..->[pp]->[p]->[c]->.. ==> ..->[pp]->[c]->[p]->.. * * if p doesn't have a previous client, then p might be head, so head must change to c * [p]->[c]->.. ==> [c]->[p]->.. * ^head ^head * if p is not head, then c is head (and p is last), so the new head is next of c * [c]->[n]->..->[p]->NULL ==> [n]->..->[p]->[c]->NULL * ^head ^last ^head ^last */ if (pp) pp->next = d->curr; else d->head = (d->curr == d->head) ? d->curr->next:d->curr; /* * next of p should be next of c * ..->[pp]->[p]->[c]->[n]->.. ==> ..->[pp]->[c]->[p]->[n]->.. * except if c was head (now c->next is head), so next of p should be c * [c]->[n]->..->[p]->NULL ==> [n]->..->[p]->[c]->NULL * ^head ^last ^head ^last */ p->next = (d->curr->next == d->head) ? d->curr:d->curr->next; /* * next of c should be p * ..->[pp]->[p]->[c]->[n]->.. ==> ..->[pp]->[c]->[p]->[n]->.. * except if c was head (now c->next is head), so c is must be last * [c]->[n]->..->[p]->NULL ==> [n]->..->[p]->[c]->NULL * ^head ^last ^head ^last */ d->curr->next = (d->curr->next == d->head) ? NULL:p; if (!d->curr->isfloat && !d->curr->istrans) tile(d); } /* move and resize a window with the keyboard */ void moveresize(const Arg *arg) { Desktop *d = &desktops[currdeskidx]; XWindowAttributes wa; if (!d->curr || !XGetWindowAttributes(dis, d->curr->win, &wa)) return; if (!d->curr->isfloat && !d->curr->istrans) { d->curr->isfloat = True; tile(d); focus(d->curr, d); } XMoveResizeWindow(dis, d->curr->win, wa.x + ((int *)arg->v)[0], wa.y + ((int *)arg->v)[1], wa.width + ((int *)arg->v)[2], wa.height + ((int *)arg->v)[3]); } /* cyclic focus the next window * if the window is the last on stack, focus head */ void next_win(void) { Desktop *d = &desktops[currdeskidx]; if (d->curr && d->head->next) focus(d->curr->next ? d->curr->next:d->head, d); } /* get the previous client from the given * if no such client, return NULL */ Client* prevclient(Client *c, Desktop *d) { Client *p = NULL; if (c && d->head && d->head->next) for (p = d->head; p->next && p->next != c; p = p->next); return p; } /* cyclic focus the previous window * if the window is the head, focus the last stack window */ void prev_win(void) { Desktop *d = &desktops[currdeskidx]; if (d->curr && d->head->next) focus(prevclient((d->prev = d->curr), d), d); } /* property notify is called when one of the window's properties * is changed, such as an urgent hint is received */ void propertynotify(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (e->xproperty.atom != XA_WM_HINTS || !wintoclient(e->xproperty.window, &c, &d)) return; XWMHints *wmh = XGetWMHints(dis, c->win); c->isurgn = (c != d->curr && wmh && (wmh->flags & XUrgencyHint)); if (wmh) XFree(wmh); desktopinfo(); } /* to quit just stop receiving events * run() is stopped and control is back to main() */ void quit(void) { running = False; } /* remove the specified client * * note: the removing client can be on any desktop! * we must always return back to the current focused desktop * if c was the previous client, previous must be updated. * if c was the current client, current must be updated. */ void removeclient(Client *c, Desktop *d) { Client **p = NULL; for (p = &d->head; *p && (*p != c); p = &(*p)->next); if (!*p) return; else *p = c->next; if (c == d->prev) d->prev = prevclient(d->curr, d); if (c == d->curr || (d->head && !d->head->next)) focus(d->prev, d); if (!(c->isfloat || c->istrans) || (d->head && !d->head->next)) tile(d); free(c); } /* main event loop - on receival of an event call the appropriate event handler */ void run(void) { XEvent ev; while(running && !XNextEvent(dis, &ev)) if (events[ev.type]) events[ev.type](&ev); } /* set or unset fullscreen state of client */ void setfullscreen(Client *c, Desktop *d, Bool fullscrn) { if (fullscrn != c->isfull) XChangeProperty(dis, c->win, netatoms[NET_WM_STATE], XA_ATOM, 32, PropModeReplace, (unsigned char*) ((c->isfull = fullscrn) ? &netatoms[NET_FULLSCREEN]:0), fullscrn); if (fullscrn) XMoveResizeWindow(dis, c->win, 0, 0, ww, wh + PANEL_HEIGHT); XSetWindowBorderWidth(dis, c->win, (c->isfull || !d->head->next ? 0:BORDER_WIDTH)); } /* set initial values * root window - screen height/width - atoms - xerror handler * set masks for reporting events handled by the wm * and propagate the suported net atoms */ void setup(void) { sigchld(0); const int screen = DefaultScreen(dis); root = RootWindow(dis, screen); ww = XDisplayWidth(dis, screen); wh = XDisplayHeight(dis, screen) - PANEL_HEIGHT; for (unsigned int d = 0; d < DESKTOPS; d++) desktops[d] = (Desktop){ .mode = DEFAULT_MODE }; win_focus = getcolor(FOCUS, screen); win_unfocus = getcolor(UNFOCUS, screen); XModifierKeymap *modmap = XGetModifierMapping(dis); for (int k = 0; k < 8; k++) for (int j = 0; j < modmap->max_keypermod; j++) if (modmap->modifiermap[modmap->max_keypermod*k + j] == XKeysymToKeycode(dis, XK_Num_Lock)) numlockmask = (1 << k); XFreeModifiermap(modmap); /* set up atoms for dialog/notification windows */ wmatoms[WM_PROTOCOLS] = XInternAtom(dis, "WM_PROTOCOLS", False); wmatoms[WM_DELETE_WINDOW] = XInternAtom(dis, "WM_DELETE_WINDOW", False); netatoms[NET_SUPPORTED] = XInternAtom(dis, "_NET_SUPPORTED", False); netatoms[NET_WM_STATE] = XInternAtom(dis, "_NET_WM_STATE", False); netatoms[NET_ACTIVE] = XInternAtom(dis, "_NET_ACTIVE_WINDOW", False); netatoms[NET_FULLSCREEN] = XInternAtom(dis, "_NET_WM_STATE_FULLSCREEN", False); /* propagate EWMH support */ XChangeProperty(dis, root, netatoms[NET_SUPPORTED], XA_ATOM, 32, PropModeReplace, (unsigned char *)netatoms, NET_COUNT); /* set the appropriate error handler * try an action that will cause an error if another wm is active * wait until events are processed to process the error from the above action * if all is good set the generic error handler */ XSetErrorHandler(xerrorstart); /* set masks for reporting events handled by the wm */ XSelectInput(dis, DefaultRootWindow(dis), SubstructureRedirectMask|ButtonPressMask| SubstructureNotifyMask|PropertyChangeMask); XSync(dis, False); XSetErrorHandler(xerror); XSync(dis, False); grabkeys(); } void sigchld(__attribute__((unused)) int sig) { if (signal(SIGCHLD, sigchld) != SIG_ERR) while(0 < waitpid(-1, NULL, WNOHANG)); else err(EXIT_FAILURE, "cannot install SIGCHLD handler"); } /* execute a command */ void spawn(const Arg *arg) { if (fork()) return; if (dis) close(ConnectionNumber(dis)); setsid(); execvp((char*)arg->com[0], (char**)arg->com); err(EXIT_SUCCESS, "execvp %s", (char *)arg->com[0]); } /* arrange windows in normal or bottom stack tile */ void stack(int hh, int cy, Desktop *d) { Client *c = NULL, *t = NULL; Bool b = (d->mode == BSTACK); int n = 0, p = 0, z = b ? ww:hh, ma = (b ? hh:ww) * MASTER_SIZE; /* count stack windows and grab first non-floating, non-fullscreen window */ for (t = d->head; t; t = t->next) if (!ISFFT(t)) { if (c) ++n; else c = t; } /* if there is only one window, it should cover the available screen space * if there is only one stack window (n == 1) then we don't care about the adjustments * if more than one stack windows (n > 1) on screen then adjustments may be needed * - p is the num of pixels than remain when spliting * the available width/height to the number of windows * - z is the clients' height/width */ if (c && !n) XMoveResizeWindow(dis, c->win, 0, cy, ww - 2*BORDER_WIDTH, hh - 2*BORDER_WIDTH); if (!c || !n) return; else if (n > 1) { p = z%n; z /= n; } /* tile the first non-floating, non-fullscreen window to cover the master area */ if (b) XMoveResizeWindow(dis, c->win, 0, cy, ww - 2*BORDER_WIDTH, ma - BORDER_WIDTH); else XMoveResizeWindow(dis, c->win, 0, cy, ma - BORDER_WIDTH, hh - 2*BORDER_WIDTH); int cx = b ? 0:ma, cw = (b ? hh:ww) - 2*BORDER_WIDTH - ma, ch = z - BORDER_WIDTH; for (cy += b ? ma:0, c = c->next; c; c = c->next) { if (ISFFT(c)) continue; for (t = c->next; t && ISFFT(t); t = t->next); if (!t) ch += p - BORDER_WIDTH; /* add remaining space to last window */ if (b) { XMoveResizeWindow(dis, c->win, cx, cy, ch, cw); cx += z; } else { XMoveResizeWindow(dis, c->win, cx, cy, cw, ch); cy += z; } } } /* swap master window with current or * if current is head swap with next * if current is not head, then head * is behind us, so move_up until we * are the head */ void swap_master(void) { Desktop *d = &desktops[currdeskidx]; if (!d->curr || !d->head->next) return; if (d->curr == d->head) move_down(); else while (d->curr != d->head) move_up(); focus(d->head, d); } /* switch the tiling mode and reset all floating windows */ void switch_mode(const Arg *arg) { Desktop *d = &desktops[currdeskidx]; if (d->mode == arg->i && d->mode != FLOAT) for (Client *c = d->head; c; c = c->next) c->isfloat = False; if ((d->mode = arg->i) == FLOAT) for (Client *c = d->head; c; c = c->next) c->isfloat = True; if (d->head) { tile(d); focus(d->curr, d); } desktopinfo(); } /* tile all windows of current desktop - call the handler tiling function */ void tile(Desktop *d) { if (!d->head || d->mode == FLOAT) return; /* nothing to arange */ layout[d->head->next ? d->mode:MONOCLE](wh, TOP_PANEL ? PANEL_HEIGHT:0, d); } /* windows that request to unmap should lose their * client, so no invisible windows exist on screen */ void unmapnotify(XEvent *e) { Desktop *d = NULL; Client *c = NULL; if (e->xunmap.send_event && wintoclient(e->xunmap.window, &c, &d)) { removeclient(c, d); desktopinfo(); } } /* find to which client and desktop the given window belongs to */ Bool wintoclient(Window w, Client **c, Desktop **d) { for (int i = 0; i < DESKTOPS && !*c; i++) for (*d = &desktops[i], *c = (*d)->head; *c && (*c)->win != w; *c = (*c)->next); return (*c != NULL); } /** * There's no way to check accesses to destroyed windows, * thus those cases are ignored (especially on UnmapNotify's). */ int xerror(__attribute__((unused)) Display *dis, XErrorEvent *ee) { if (ee->error_code == BadWindow || (ee->error_code == BadAccess && ee->request_code == X_GrabKey) || (ee->error_code == BadMatch && (ee->request_code == X_SetInputFocus || ee->request_code == X_ConfigureWindow)) || (ee->error_code == BadDrawable && (ee->request_code == X_PolyFillRectangle || ee->request_code == X_CopyArea || ee->request_code == X_PolySegment || ee->request_code == X_PolyText8))) return 0; err(EXIT_FAILURE, "xerror: request: %d code: %d", ee->request_code, ee->error_code); } /** * error handler function to display an appropriate error message * when the window manager initializes (see setup - XSetErrorHandler) */ int xerrorstart(__attribute__((unused)) Display *dis, __attribute__((unused)) XErrorEvent *ee) { errx(EXIT_FAILURE, "xerror: another window manager is already running"); } int main(int argc, char *argv[]) { if (argc == 2 && !strncmp(argv[1], "-v", 3)) errx(EXIT_SUCCESS, "version: %s - by c00kiemon5ter >:3 omnomnomnom", VERSION); else if (argc != 1) errx(EXIT_FAILURE, "usage: man monsterwm"); if (!(dis = XOpenDisplay(NULL))) errx(EXIT_FAILURE, "cannot open display"); setup(); desktopinfo(); /* zero out every desktop on (re)start */ run(); cleanup(); XCloseDisplay(dis); return 0; }