--- /dev/null
+/* cc -O2 -I /usr/X11R6/include/ scrotwm.c -L /usr/X11R6/lib/ -lX11 -o scrotwm */
+/* then add to .xinitrc */
+/*
+ * Copyright (c) 2009 Marco Peereboom <marco@peereboom.us>
+ * Copyright (c) 2009 Ryan McBride <mcbride@countersiege.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/*
+ * Much code and ideas taken from dwm under the following license:
+ * MIT/X Consortium License
+ *
+ * 2006-2008 Anselm R Garbe <garbeam at gmail dot com>
+ * 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
+ * 2006-2007 Jukka Salmi <jukka at salmi dot ch>
+ * 2007 Premysl Hruby <dfenze at gmail dot com>
+ * 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
+ * 2007 Christof Musik <christof at sendfax dot de>
+ * 2007-2008 Enno Gottox Boland <gottox at s01 dot de>
+ * 2007-2008 Peter Hartlich <sgkkr at hartlich dot com>
+ * 2008 Martin Hurton <martin dot hurton at gmail dot com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#define SWM_VERSION "0.5"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <err.h>
+#include <locale.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/queue.h>
+
+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/Xproto.h>
+#include <X11/Xutil.h>
+
+/* #define SWM_DEBUG */
+#ifdef SWM_DEBUG
+#define DPRINTF(x...) do { if (swm_debug) fprintf(stderr, x); } while(0)
+#define DNPRINTF(n,x...) do { if (swm_debug & n) fprintf(stderr, x); } while(0)
+#define SWM_D_EVENT 0x0001
+#define SWM_D_WS 0x0002
+
+uint32_t swm_debug = 0
+ | SWM_D_EVENT
+ | SWM_D_WS
+ ;
+#else
+#define DPRINTF(x...)
+#define DNPRINTF(n,x...)
+#endif
+
+#define LENGTH(x) (sizeof x / sizeof x[0])
+#define MODKEY Mod1Mask
+#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
+
+int (*xerrorxlib)(Display *, XErrorEvent *);
+int other_wm;
+int screen;
+int width, height;
+int running = 1;
+int ignore_enter = 0;
+unsigned int numlockmask = 0;
+Display *display;
+Window root;
+
+struct ws_win {
+ TAILQ_ENTRY(ws_win) entry;
+ Window id;
+};
+
+TAILQ_HEAD(ws_win_list, ws_win);
+
+/* define work spaces */
+#define SWM_WS_MAX (10)
+struct workspace {
+ int visible; /* workspace visible */
+ struct ws_win *focus; /* which win has focus */
+ int winno; /* total nr of windows */
+ struct ws_win_list winlist;
+} ws[SWM_WS_MAX];
+int current_ws = 0;
+
+/* args to functions */
+union arg {
+ int id;
+#define SWM_ARG_ID_FOCUSNEXT (0)
+#define SWM_ARG_ID_FOCUSPREV (1)
+#define SWM_ARG_ID_FOCUSMAIN (2)
+};
+
+void
+quit(union arg *args)
+{
+ running = 0;
+}
+
+void
+spawn(union arg *args)
+{
+ char *argv[] = { "xterm", NULL }; /* XXX make this in args */
+
+ /*
+ * The double-fork construct avoids zombie processes and keeps the code
+ * clean from stupid signal handlers.
+ */
+ if(fork() == 0) {
+ if(fork() == 0) {
+ if(display)
+ close(ConnectionNumber(display));
+ setsid();
+ execvp(argv[0], argv);
+ fprintf(stderr, "execvp failed\n");
+ perror(" failed");
+ }
+ exit(0);
+ }
+ wait(0);
+}
+
+void
+switchws(union arg *args)
+{
+ int wsid = args->id;
+ struct ws_win *win;
+ Window winfocus;
+
+ DNPRINTF(SWM_D_WS, "switchws: %d\n", wsid + 1);
+
+ if (wsid == current_ws)
+ return;
+
+ /* map new window first to prevent ugly blinking */
+ TAILQ_FOREACH (win, &ws[wsid].winlist, entry)
+ XMapWindow(display, win->id);
+ ws[wsid].visible = 1;
+
+ TAILQ_FOREACH (win, &ws[current_ws].winlist, entry)
+ XUnmapWindow(display, win->id);
+ ws[current_ws].visible = 0;
+
+ current_ws = wsid;
+
+ ignore_enter = 1;
+ if (ws[wsid].focus != NULL) {
+ DNPRINTF(SWM_D_WS, "switchws: focus %d\n", ws[wsid].focus);
+ XSetInputFocus(display, ws[wsid].focus->id, RevertToPointerRoot,
+ CurrentTime);
+ }
+ XSync(display, False);
+}
+
+void
+focus(union arg *args)
+{
+ Window winfocus, winlostfocus;
+
+ if (ws[current_ws].focus == NULL || ws[current_ws].winno == 0)
+ return;
+
+ winlostfocus = ws[current_ws].focus->id;
+
+ switch (args->id) {
+ case SWM_ARG_ID_FOCUSPREV:
+ if (ws[current_ws].focus ==
+ TAILQ_FIRST(&ws[current_ws].winlist))
+ ws[current_ws].focus =
+ TAILQ_LAST(&ws[current_ws].winlist, ws_win_list);
+ else
+ ws[current_ws].focus =TAILQ_PREV(ws[current_ws].focus,
+ ws_win_list, entry);
+ break;
+
+ case SWM_ARG_ID_FOCUSNEXT:
+ if (ws[current_ws].focus == TAILQ_LAST(&ws[current_ws].winlist,
+ ws_win_list))
+ ws[current_ws].focus =
+ TAILQ_FIRST(&ws[current_ws].winlist);
+ else
+ ws[current_ws].focus =
+ TAILQ_NEXT(ws[current_ws].focus, entry);
+ break;
+
+ case SWM_ARG_ID_FOCUSMAIN:
+ ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);;
+ break;
+
+ default:
+ return;
+ }
+
+ winfocus = ws[current_ws].focus->id;
+ XSetWindowBorder(display, winlostfocus, 0x888888);
+ XSetWindowBorder(display, winfocus, 0xff0000);
+ XSetInputFocus(display, winfocus, RevertToPointerRoot, CurrentTime);
+ XSync(display, False);
+}
+
+/* I know this sucks but it works well enough */
+void
+stack(void)
+{
+ XWindowChanges wc;
+ struct ws_win *win;
+ Window winfocus = root;
+ int i, h, w, x, y, winno, hrh;
+
+ DNPRINTF(SWM_D_EVENT, "stack: workspace: %d\n", current_ws);
+
+ if (ws[current_ws].winno == 0)
+ return;
+
+ if (ws[current_ws].winno > 1)
+ w = width / 2;
+ else
+ w = width;
+
+ if (ws[current_ws].winno > 2)
+ hrh = height / (ws[current_ws].winno - 1);
+ else
+ hrh = 0;
+
+ x = 0;
+ y = 0;
+ h = height;
+ i = 0;
+ TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
+ if (i == 1) {
+ x += w + 2;
+ w -= 2;
+ }
+ if (i != 0 && hrh != 0) {
+ /* correct the last window for lost pixels */
+ if (win == TAILQ_LAST(&ws[current_ws].winlist,
+ ws_win_list)) {
+ h = height - (i * hrh);
+ if (h == 0)
+ h = hrh;
+ else
+ h += hrh;
+ y += hrh;
+ } else {
+ h = hrh - 2;
+ /* leave first right hand window at y = 0 */
+ if (i > 1)
+ y += h + 2;
+ }
+ }
+
+ bzero(&wc, sizeof wc);
+ wc.x = x;
+ wc.y = y;
+ wc.width = w;
+ wc.height = h;
+ wc.border_width = 1;
+ XConfigureWindow(display, win->id, CWX | CWY | CWWidth |
+ CWHeight | CWBorderWidth, &wc);
+ if (win == ws[current_ws].focus) {
+ winfocus = win->id;
+ XSetWindowBorder(display, win->id, 0xff0000);
+ } else
+ XSetWindowBorder(display, win->id, 0x888888);
+ XMapWindow(display, win->id);
+ i++;
+ }
+
+ XSetInputFocus(display, winfocus, RevertToPointerRoot, CurrentTime);
+ XSync(display, False);
+}
+
+void
+swap_to_main(union arg *args)
+{
+ struct ws_win *tmpwin = TAILQ_FIRST(&ws[current_ws].winlist);
+
+ TAILQ_REMOVE(&ws[current_ws].winlist, tmpwin, entry);
+ TAILQ_INSERT_AFTER(&ws[current_ws].winlist, ws[current_ws].focus,
+ tmpwin, entry);
+ TAILQ_REMOVE(&ws[current_ws].winlist, ws[current_ws].focus, entry);
+ TAILQ_INSERT_HEAD(&ws[current_ws].winlist, ws[current_ws].focus, entry);
+ ws[current_ws].focus = TAILQ_FIRST(&ws[current_ws].winlist);
+ ignore_enter = 2;
+ stack();
+}
+
+/* key definitions */
+struct key {
+ unsigned int mod;
+ KeySym keysym;
+ void (*func)(union arg *);
+ union arg args;
+} keys[] = {
+ /* modifier key function argument */
+ { MODKEY, XK_Return, swap_to_main, {0} },
+ { MODKEY | ShiftMask, XK_Return, spawn, {0} },
+ { MODKEY | ShiftMask, XK_q, quit, {0} },
+ { MODKEY, XK_m, focus, {.id = SWM_ARG_ID_FOCUSMAIN} },
+ { MODKEY, XK_1, switchws, {.id = 0} },
+ { MODKEY, XK_2, switchws, {.id = 1} },
+ { MODKEY, XK_3, switchws, {.id = 2} },
+ { MODKEY, XK_4, switchws, {.id = 3} },
+ { MODKEY, XK_5, switchws, {.id = 4} },
+ { MODKEY, XK_6, switchws, {.id = 5} },
+ { MODKEY, XK_7, switchws, {.id = 6} },
+ { MODKEY, XK_8, switchws, {.id = 7} },
+ { MODKEY, XK_9, switchws, {.id = 8} },
+ { MODKEY, XK_0, switchws, {.id = 9} },
+ { MODKEY, XK_Tab, focus, {.id = SWM_ARG_ID_FOCUSNEXT} },
+ { MODKEY | ShiftMask, XK_Tab, focus, {.id = SWM_ARG_ID_FOCUSPREV} },
+};
+
+void
+updatenumlockmask(void)
+{
+ unsigned int i, j;
+ XModifierKeymap *modmap;
+
+ numlockmask = 0;
+ modmap = XGetModifierMapping(display);
+ for (i = 0; i < 8; i++)
+ for (j = 0; j < modmap->max_keypermod; j++)
+ if (modmap->modifiermap[i * modmap->max_keypermod + j]
+ == XKeysymToKeycode(display, XK_Num_Lock))
+ numlockmask = (1 << i);
+
+ XFreeModifiermap(modmap);
+}
+
+void
+grabkeys(void)
+{
+ unsigned int i, j;
+ KeyCode code;
+ unsigned int modifiers[] =
+ { 0, LockMask, numlockmask, numlockmask | LockMask };
+
+ updatenumlockmask();
+
+ XUngrabKey(display, AnyKey, AnyModifier, root);
+ for(i = 0; i < LENGTH(keys); i++) {
+ if((code = XKeysymToKeycode(display, keys[i].keysym)))
+ for(j = 0; j < LENGTH(modifiers); j++)
+ XGrabKey(display, code,
+ keys[i].mod | modifiers[j], root,
+ True, GrabModeAsync, GrabModeAsync);
+ }
+}
+void
+expose(XEvent *e)
+{
+ XExposeEvent *ev = &e->xexpose;
+
+ DNPRINTF(SWM_D_EVENT, "expose: window: %d\n", ev->window);
+}
+
+void
+keypress(XEvent *e)
+{
+ unsigned int i;
+ KeySym keysym;
+ XKeyEvent *ev = &e->xkey;
+
+ DNPRINTF(SWM_D_EVENT, "keypress: window: %d\n", ev->window);
+
+ keysym = XKeycodeToKeysym(display, (KeyCode)ev->keycode, 0);
+ for(i = 0; i < LENGTH(keys); i++)
+ if(keysym == keys[i].keysym
+ && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state)
+ && keys[i].func)
+ keys[i].func(&(keys[i].args));
+}
+
+void
+buttonpress(XEvent *e)
+{
+ XButtonPressedEvent *ev = &e->xbutton;
+ struct ws_win *win;
+
+ DNPRINTF(SWM_D_EVENT, "buttonpress: window: %d\n", ev->window);
+
+ if (ev->window == root)
+ return;
+ if (ev->window == ws[current_ws].focus->id)
+ return;
+
+ TAILQ_FOREACH(win, &ws[current_ws].winlist, entry)
+ if (win->id == ev->window) {
+ /* focus in the clicked window */
+ XSetWindowBorder(display, ev->window, 0xff0000);
+ XSetWindowBorder(display,
+ ws[current_ws].focus->id, 0x888888);
+ XSetInputFocus(display, ev->window, RevertToPointerRoot,
+ CurrentTime);
+ ws[current_ws].focus = win;
+ XSync(display, False);
+ break;
+ }
+}
+
+void
+configurerequest(XEvent *e)
+{
+ XConfigureRequestEvent *ev = &e->xconfigurerequest;
+ struct ws_win *win;
+
+ DNPRINTF(SWM_D_EVENT, "configurerequest: window: %d\n", ev->window);
+
+ XSelectInput(display, ev->window, ButtonPressMask | EnterWindowMask |
+ FocusChangeMask);
+
+ if ((win = calloc(1, sizeof(struct ws_win))) == NULL)
+ errx(1, "calloc: failed to allocate memory for new window");
+
+ win->id = ev->window;
+ TAILQ_INSERT_TAIL(&ws[current_ws].winlist, win, entry);
+ ws[current_ws].focus = win; /* make new win focused */
+ ws[current_ws].winno++;
+ stack();
+}
+
+void
+configurenotify(XEvent *e)
+{
+ XConfigureEvent *ev = &e->xconfigure;
+
+ DNPRINTF(SWM_D_EVENT, "configurenotify: window: %d\n", ev->window);
+}
+
+void
+destroynotify(XEvent *e)
+{
+ size_t sz;
+ struct ws_win *win;
+ XDestroyWindowEvent *ev = &e->xdestroywindow;
+
+ DNPRINTF(SWM_D_EVENT, "destroynotify: window %d\n", ev->window);
+
+ TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
+ DNPRINTF(SWM_D_EVENT, "trying: %x\n", win->id);
+ if (ev->window == win->id) {
+ /* find a window to focus */
+ ws[current_ws].focus =
+ TAILQ_PREV(win, ws_win_list,entry);
+ if (ws[current_ws].focus == NULL)
+ ws[current_ws].focus =
+ TAILQ_FIRST(&ws[current_ws].winlist);
+
+ TAILQ_REMOVE(&ws[current_ws].winlist, win, entry);
+ free(win);
+ ws[current_ws].winno--;
+ break;
+ }
+ }
+
+ stack();
+}
+
+void
+enternotify(XEvent *e)
+{
+ XCrossingEvent *ev = &e->xcrossing;
+ struct ws_win *win;
+
+ DNPRINTF(SWM_D_EVENT, "enternotify: window: %d\n", ev->window);
+
+ if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) &&
+ ev->window != root)
+ return;
+ if (ignore_enter) {
+ /* eat event(s) to prevent autofocus */
+ ignore_enter--;
+ return;
+ }
+ TAILQ_FOREACH (win, &ws[current_ws].winlist, entry) {
+ if (win->id == ev->window) {
+ XSetInputFocus(display, ev->window, RevertToPointerRoot,
+ CurrentTime);
+ XSetWindowBorder(display, ev->window, 0xff0000);
+ ws[current_ws].focus = win;
+ } else
+ XSetWindowBorder(display, win->id, 0x888888);
+ }
+}
+
+void
+focusin(XEvent *e)
+{
+ XFocusChangeEvent *ev = &e->xfocus;
+
+ DNPRINTF(SWM_D_EVENT, "focusin: window: %d\n", ev->window);
+
+ if (ev->window == root)
+ return;
+
+ /*
+ * kill grab for now so that we can cut and paste , this screws up
+ * click to focus
+ */
+ /*
+ DNPRINTF(SWM_D_EVENT, "focusin: window: %d grabbing\n", ev->window);
+ XGrabButton(display, Button1, AnyModifier, ev->window, False,
+ ButtonPress, GrabModeAsync, GrabModeSync, None, None);
+ */
+}
+
+void
+mappingnotify(XEvent *e)
+{
+ XMappingEvent *ev = &e->xmapping;
+
+ DNPRINTF(SWM_D_EVENT, "mappingnotify: window: %d\n", ev->window);
+
+ XRefreshKeyboardMapping(ev);
+ if(ev->request == MappingKeyboard)
+ grabkeys();
+}
+
+void
+maprequest(XEvent *e)
+{
+ XMapRequestEvent *ev = &e->xmaprequest;
+
+ DNPRINTF(SWM_D_EVENT, "maprequest: window: %d\n", ev->window);
+}
+
+void
+propertynotify(XEvent *e)
+{
+ XPropertyEvent *ev = &e->xproperty;
+
+ DNPRINTF(SWM_D_EVENT, "propertynotify: window: %d\n", ev->window);
+}
+
+void
+unmapnotify(XEvent *e)
+{
+ XUnmapEvent *ev = &e->xunmap;
+
+ DNPRINTF(SWM_D_EVENT, "unmapnotify: window: %d\n", ev->window);
+}
+
+void (*handler[LASTEvent])(XEvent *) = {
+ [Expose] = expose,
+ [KeyPress] = keypress,
+ [ButtonPress] = buttonpress,
+ [ConfigureRequest] = configurerequest,
+ [ConfigureNotify] = configurenotify,
+ [DestroyNotify] = destroynotify,
+ [EnterNotify] = enternotify,
+ [FocusIn] = focusin,
+ [MappingNotify] = mappingnotify,
+ [MapRequest] = maprequest,
+ [PropertyNotify] = propertynotify,
+ [UnmapNotify] = unmapnotify,
+};
+
+int
+xerror_start(Display *d, XErrorEvent *ee)
+{
+ other_wm = 1;
+ return (-1);
+}
+
+int
+xerror(Display *d, XErrorEvent *ee)
+{
+ fprintf(stderr, "error: %p %p\n", display, ee);
+
+ return (-1);
+}
+
+int
+active_wm(void)
+{
+ other_wm = 0;
+ xerrorxlib = XSetErrorHandler(xerror_start);
+
+ /* this causes an error if some other window manager is running */
+ XSelectInput(display, DefaultRootWindow(display),
+ SubstructureRedirectMask);
+ XSync(display, False);
+ if(other_wm)
+ return (1);
+
+ XSetErrorHandler(xerror);
+ XSync(display, False);
+ return (0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ XEvent e;
+ int i;
+
+ fprintf(stderr, "Welcome to scrotwm V%s\n", SWM_VERSION);
+ if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+ warnx("no locale support");
+
+ if(!(display = XOpenDisplay(0)))
+ errx(1, "can not open display");
+
+ if (active_wm())
+ errx(1, "other wm running");
+
+ screen = DefaultScreen(display);
+ root = RootWindow(display, screen);
+ width = DisplayWidth(display, screen) - 2;
+ height = DisplayHeight(display, screen) - 2;
+
+ /* make work space 1 active */
+ ws[0].visible = 1;
+ ws[0].focus = NULL;
+ ws[0].winno = 0;
+ TAILQ_INIT(&ws[0].winlist);
+ for (i = 1; i < SWM_WS_MAX; i++) {
+ ws[i].visible = 0;
+ ws[i].focus = NULL;
+ ws[i].winno = 0;
+ TAILQ_INIT(&ws[i].winlist);
+ }
+
+ XSelectInput(display, root, SubstructureRedirectMask |
+ SubstructureNotifyMask | ButtonPressMask | KeyPressMask |
+ EnterWindowMask | LeaveWindowMask | StructureNotifyMask |
+ FocusChangeMask | PropertyChangeMask);
+
+ grabkeys();
+
+ while (running) {
+ XNextEvent(display, &e);
+ if (handler[e.type])
+ handler[e.type](&e);
+ }
+
+ XCloseDisplay(display);
+
+ return (0);
+}