/* See LICENSE file for copyright and license details. * * dynamic window manager is designed like any other X client as well. It is * driven through handling X events. In contrast to other X clients, a window * manager selects for SubstructureRedirectMask on the root window, to receive * events about window (dis-)appearance. Only one X connection at a time is * allowed to select for this event mask. * * Calls to fetch an X event from the event queue are blocking. Due reading * status text from standard input, a select()-driven main loop has been * implemented which selects for reads on the X connection and STDIN_FILENO to * handle all data smoothly. The event handlers of dwm are organized in an * array which is accessed whenever a new event has been fetched. This allows * event dispatching in O(1) time. * * Each child of the root window is called a client, except windows which have * set the override_redirect flag. Clients are organized in a global * doubly-linked client list, the focus history is remembered through a global * stack list. Each client contains a bit array to indicate the tags of a * client. * * Keys and tagging rules are organized as arrays and defined in config.h. * * To understand everything else, start reading main(). */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef XINERAMA #include #endif /* macros */ #define MAX(a, b) ((a) > (b) ? (a) : (b)) #define MIN(a, b) ((a) < (b) ? (a) : (b)) #define BUTTONMASK (ButtonPressMask|ButtonReleaseMask) #define CLEANMASK(mask) (mask & ~(numlockmask|LockMask)) #define LENGTH(x) (sizeof x / sizeof x[0]) #define MAXTAGLEN 16 #define MOUSEMASK (BUTTONMASK|PointerMotionMask) #define TAGMASK ((int)((1LL << LENGTH(tags)) - 1)) #define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height) /* enums */ enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */ enum { ColBorder, ColFG, ColBG, ColLast }; /* color */ enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */ enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */ /* typedefs */ typedef unsigned int uint; typedef unsigned long ulong; typedef struct Client Client; struct Client { char name[256]; int x, y, w, h; int basew, baseh, incw, inch, maxw, maxh, minw, minh; float mina, maxa; int bw, oldbw; Bool isbanned, isfixed, isfloating, ismoved, isurgent; uint tags; Client *next; Client *snext; Window win; }; typedef struct { int x, y, w, h; ulong norm[ColLast]; ulong sel[ColLast]; Drawable drawable; GC gc; struct { int ascent; int descent; int height; XFontSet set; XFontStruct *xfont; } font; } DC; /* draw context */ typedef union { int i; uint ui; float f; void *v; } Arg; typedef struct { uint mod; KeySym keysym; void (*func)(const Arg *); const Arg arg; } Key; typedef struct { const char *symbol; void (*arrange)(void); } Layout; typedef struct { const char *cla

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ce.height = c->h; ce.border_width = c->bw; ce.above = None; ce.override_redirect = False; XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce); } void configurenotify(XEvent *e) { XConfigureEvent *ev = &e->xconfigure; if(ev->window == root && (ev->width != sw || ev->height != sh)) { sw = ev->width; sh = ev->height; updategeom(); updatebar(); arrange(); } } void configurerequest(XEvent *e) { Client *c; XConfigureRequestEvent *ev = &e->xconfigurerequest; XWindowChanges wc; if((c = getclient(ev->window))) { if(ev->value_mask & CWBorderWidth) c->bw = ev->border_width; if(ismax && !c->isbanned && !c->isfixed) XMoveResizeWindow(dpy, c->win, wx, wy, ww - 2 * c->bw, wh + 2 * c->bw); else if(c->isfloating || !lt->arrange) { if(ev->value_mask & CWX) c->x = sx + ev->x; if(ev->value_mask & CWY) c->y = sy + ev->y; if(ev->value_mask & CWWidth) c->w = ev->width; if(ev->value_mask & CWHeight) c->h = ev->height; if((c->x - sx + c->w) > sw && c->isfloating) c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */ if((c->y - sy + c->h) > sh && c->isfloating) c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */ if((ev->value_mask & (CWX|CWY)) && !(ev->value_mask & (CWWidth|CWHeight))) configure(c); if(!c->isbanned) XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); } else configure(c); } else { wc.x = ev->x; wc.y = ev->y; wc.width = ev->width; wc.height = ev->height; wc.border_width = ev->border_width; wc.sibling = ev->above; wc.stack_mode = ev->detail; XConfigureWindow(dpy, ev->window, ev->value_mask, &wc); } XSync(dpy, False); } void destroynotify(XEvent *e) { Client *c; XDestroyWindowEvent *ev = &e->xdestroywindow; if((c = getclient(ev->window))) unmanage(c); } void detach(Client *c) { Client *i; if (c != clients) { for(i = clients; i->next != c; i = i->next); i->next = c->next; } else { clients = c->next; } c->next = NULL; } void detachstack(Client *c) { Client **tc; for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext); *tc = c->snext; } void drawbar(void) { int i, x; Client *c; dc.x = 0; for(c = stack; c && c->isbanned; c = c->snext); for(i = 0; i < LENGTH(tags); i++) { dc.w = TEXTW(tags[i]); if(tagset[seltags] & 1 << i) { drawtext(tags[i], dc.sel, isurgent(i)); drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.sel); } else { drawtext(tags[i], dc.norm, isurgent(i)); drawsquare(c && c->tags & 1 << i, isoccupied(i), isurgent(i), dc.norm); } dc.x += dc.w; } if(blw > 0) { dc.w = blw; drawtext(lt->symbol, dc.norm, ismax); x = dc.x + dc.w; } else x = dc.x; dc.w = TEXTW(stext); dc.x = ww - dc.w; if(dc.x < x) { dc.x = x; dc.w = ww - x; } drawtext(stext, dc.norm, False); if((dc.w = dc.x - x) > bh) { dc.x = x; if(c) { drawtext(c->name, dc.sel, False); drawsquare(c->isfixed, c->isfloating, False, dc.sel); } else drawtext(NULL, dc.norm, False); } XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, ww, bh, 0, 0); XSync(dpy, False); } void drawsquare(Bool filled, Bool empty, Bool invert, ulong col[ColLast]) { int x; XGCValues gcv; XRectangle r = { dc.x, dc.y, dc.w, dc.h }; gcv.foreground = col[invert ? ColBG : ColFG]; XChangeGC(dpy, dc.gc, GCForeground, &gcv); x = (dc.font.ascent + dc.font.descent + 2) / 4; r.x = dc.x + 1; r.y = dc.y + 1; if(filled) { r.width = r.height = x + 1; XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1); } else if(empty) { r.width = r.height = x; XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1); } } void drawtext(const char *text, ulong col[ColLast], Bool invert) { int i, x, y, h, len, olen; XRectangle r = { dc.x, dc.y, dc.w, dc.h }; char buf[256]; XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]); XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1); if(!text) return; olen = strlen(text); len = MIN(olen, sizeof buf); memcpy(buf, text, len); h = dc.font.ascent + dc.font.descent; y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent; x = dc.x + (h / 2); /* shorten text if necessary */ for(; len && (i = textnw(buf, len)) > dc.w - h; len--); if(!len) return; if(len < olen) for(i = len; i && i > len - 3; buf[--i] = '.'); XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]); if(dc.font.set) XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len); else XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len); } void enternotify(XEvent *e) { Client *c; XCrossingEvent *ev = &e->xcrossing; if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root) return; if((c = getclient(ev->window))) focus(c); else focus(NULL); } void eprint(const char *errstr, ...) { va_list ap; va_start(ap, errstr); vfprintf(stderr, errstr, ap); va_end(ap); exit(EXIT_FAILURE); } void expose(XEvent *e) { XExposeEvent *ev = &e->xexpose; if(ev->count == 0 && (ev->window == barwin)) drawbar(); } void focus(Client *c) { if(!c || c->isbanned) for(c = stack; c && c->isbanned; c = c->snext); if(sel && sel != c) { grabbuttons(sel, False); XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]); } if(c) { detachstack(c); attachstack(c); grabbuttons(c, True); XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]); XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime); } else XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime); sel = c; drawbar(); } void focusin(XEvent *e) { /* there are some broken focus acquiring clients */ XFocusChangeEvent *ev = &e->xfocus; if(sel && ev->window != sel->win) XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime); } void focusstack(const Arg *arg) { Client *c = NULL, *i; if(!sel) return; if (arg->i > 0) { for(c = sel->next; c && c->isbanned; c = c->next); if(!c) for(c = clients; c && c->isbanned; c = c->next); } else { for(i = clients; i != sel; i = i->next) if (!i->isbanned) c = i; if(!c) for(; i; i = i->next) if (!i->isbanned) c = i; } if(c) { focus(c); restack(); } } Client * getclient(Window w) { Client *c; for(c = clients; c && c->win != w; c = c->next); return c; } ulong getcolor(const char *colstr) { Colormap cmap = DefaultColormap(dpy, screen); XColor color; if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color)) eprint("error, cannot allocate color '%s'\n", colstr); return color.pixel; } long getstate(Window w) { int format, status; long result = -1; unsigned char *p = NULL; ulong n, extra; Atom real; status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState], &real, &format, &n, &extra, (unsigned char **)&p); if(status != Success) return -1; if(n != 0) result = *p; XFree(p); return result; } Bool gettextprop(Window w, Atom atom, char *text, uint size) { char **list = NULL; int n; XTextProperty name; if(!text || size == 0) return False; text[0] = '\0'; XGetTextProperty(dpy, w, &name, atom); if(!name.nitems) return False; if(name.encoding == XA_STRING) strncpy(text, (char *)name.value, size - 1); else { if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success && n > 0 && *list) { strncpy(text, *list, size - 1); XFreeStringList(list); } } text[size - 1] = '\0'; XFree(name.value); return True; } void grabbuttons(Client *c, Bool focused) { int i, j; uint buttons[] = { Button1, Button2, Button3 }; uint modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask, MODKEY|numlockmask|LockMask }; XUngrabButton(dpy, AnyButton, AnyModifier, c->win); if(focused) for(i = 0; i < LENGTH(buttons); i++) for(j = 0; j < LENGTH(modifiers); j++) XGrabButton(dpy, buttons[i], modifiers[j], c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None); else XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK, GrabModeAsync, GrabModeSync, None, None); } void grabkeys(void) { uint i, j; KeyCode code; XModifierKeymap *modmap; /* init modifier map */ modmap = XGetModifierMapping(dpy); for(i = 0; i < 8; i++) for(j = 0; j < modmap->max_keypermod; j++) { if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock)) numlockmask = (1 << i); } XFreeModifiermap(modmap); XUngrabKey(dpy, AnyKey, AnyModifier, root); for(i = 0; i < LENGTH(keys); i++) { code = XKeysymToKeycode(dpy, keys[i].keysym); XGrabKey(dpy, code, keys[i].mod, root, True, GrabModeAsync, GrabModeAsync); XGrabKey(dpy, code, keys[i].mod|LockMask, root, True, GrabModeAsync, GrabModeAsync); XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True, GrabModeAsync, GrabModeAsync); XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True, GrabModeAsync, GrabModeAsync); } } void initfont(const char *fontstr) { char *def, **missing; int i, n; missing = NULL; if(dc.font.set) XFreeFontSet(dpy, dc.font.set); dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def); if(missing) { while(n--) fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]); XFreeStringList(missing); } if(dc.font.set) { XFontSetExtents *font_extents; XFontStruct **xfonts; char **font_names; dc.font.ascent = dc.font.descent = 0; font_extents = XExtentsOfFontSet(dc.font.set); n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names); for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) { dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent); dc.font.descent = MAX(dc.font.descent,(*xfonts)->descent); xfonts++; } } else { if(dc.font.xfont) XFreeFont(dpy, dc.font.xfont); dc.font.xfont = NULL; if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)) && !(dc.font.xfont = XLoadQueryFont(dpy, "fixed"))) eprint("error, cannot load font: '%s'\n", fontstr); dc.font.ascent = dc.font.xfont->ascent; dc.font.descent = dc.font.xfont->descent; } dc.font.height = dc.font.ascent + dc.font.descent; } Bool isoccupied(uint t) { Client *c; for(c = clients; c; c = c->next) if(c->tags & 1 << t) return True; return False; } Bool isprotodel(Client *c) { int i, n; Atom *protocols; Bool ret = False; if(XGetWMProtocols(dpy, c->win, &protocols, &n)) { for(i = 0; !ret && i < n; i++) if(protocols[i] == wmatom[WMDelete]) ret = True; XFree(protocols); } return ret; } Bool isurgent(uint t) { Client *c; for(c = clients; c; c = c->next) if(c->isurgent && c->tags & 1 << t) return True; return False; } void keypress(XEvent *e) { uint i; KeySym keysym; XKeyEvent *ev; ev = &e->xkey; keysym = XKeycodeToKeysym(dpy, (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].arg)); } void killclient(const Arg *arg) { XEvent ev; if(!sel) return; if(isprotodel(sel)) { ev.type = ClientMessage; ev.xclient.window = sel->win; ev.xclient.message_type = wmatom[WMProtocols]; ev.xclient.format = 32; ev.xclient.data.l[0] = wmatom[WMDelete]; ev.xclient.data.l[1] = CurrentTime; XSendEvent(dpy, sel->win, False, NoEventMask, &ev); } else XKillClient(dpy, sel->win); } void manage(Window w, XWindowAttributes *wa) { Client *c, *t = NULL; Status rettrans; Window trans; XWindowChanges wc; if(!(c = calloc(1, sizeof(Client)))) eprint("fatal: could not calloc() %u bytes\n", sizeof(Client)); c->win = w; /* geometry */ c->x = wa->x; c->y = wa->y; c->w = wa->width; c->h = wa->height; c->oldbw = wa->border_width; if(c->w == sw && c->h == sh) { c->x = sx; c->y = sy; c->bw = wa->border_width; } else { if(c->x + c->w + 2 * c->bw > sx + sw) c->x = sx + sw - c->w - 2 * c->bw; if(c->y + c->h + 2 * c->bw > sy + sh) c->y = sy + sh - c->h - 2 * c->bw; c->x = MAX(c->x, sx); c->y = MAX(c->y, by == 0 ? bh : sy); c->bw = borderpx; } wc.border_width = c->bw; XConfigureWindow(dpy, w, CWBorderWidth, &wc); XSetWindowBorder(dpy, w, dc.norm[ColBorder]); configure(c); /* propagates border_width, if size doesn't change */ updatesizehints(c); XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask); grabbuttons(c, False); updatetitle(c); if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success)) for(t = clients; t && t->win != trans; t = t->next); if(t) c->tags = t->tags; else applyrules(c); if(!c->isfloating) c->isfloating = (rettrans == Success) || c->isfixed; if(c->isfloating) XRaiseWindow(dpy, c->win); attach(c); attachstack(c); XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */ XMapWindow(dpy, c->win); setclientstate(c, NormalState); arrange(); } void mappingnotify(XEvent *e) { XMappingEvent *ev = &e->xmapping; XRefreshKeyboardMapping(ev); if(ev->request == MappingKeyboard) grabkeys(); } void maprequest(XEvent *e) { static XWindowAttributes wa; XMapRequestEvent *ev = &e->xmaprequest; if(!XGetWindowAttributes(dpy, ev->window, &wa)) return; if(wa.override_redirect) return; if(!getclient(ev->window)) manage(ev->window, &wa); } void movemouse(Client *c) { int x1, y1, ocx, ocy, di, nx, ny; uint dui; Window dummy; XEvent ev; restack(); ocx = nx = c->x; ocy = ny = c->y; if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync, None, cursor[CurMove], CurrentTime) != GrabSuccess) return; XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui); for(;;) { XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev); switch (ev.type) { case ButtonRelease: XUngrabPointer(dpy, CurrentTime); return; case ConfigureRequest: case Expose: case MapRequest: handler[ev.type](&ev); break; case MotionNotify: XSync(dpy, False); nx = ocx + (ev.xmotion.x - x1); ny = ocy + (ev.xmotion.y - y1); if(snap && nx >= wx && nx <= wx + ww && ny >= wy && ny <= wy + wh) { if(abs(wx - nx) < snap) nx = wx; else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap) nx = wx + ww - c->w - 2 * c->bw; if(abs(wy - ny) < snap) ny = wy; else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap) ny = wy + wh - c->h - 2 * c->bw; if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap)) togglefloating(NULL); } if(!lt->arrange || c->isfloating) resize(c, nx, ny, c->w, c->h, False); break; } } } Client * nexttiled(Client *c) { for(; c && (c->isfloating || c->isbanned); c = c->next); return c; } void propertynotify(XEvent *e) { Client *c; Window trans; XPropertyEvent *ev = &e->xproperty; if(ev->state == PropertyDelete) return; /* ignore */ if((c = getclient(ev->window))) { switch (ev->atom) { default: break; case XA_WM_TRANSIENT_FOR: XGetTransientForHint(dpy, c->win, &trans); if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL))) arrange(); break; case XA_WM_NORMAL_HINTS: updatesizehints(c); break; case XA_WM_HINTS: updatewmhints(c); drawbar(); break; } if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) { updatetitle(c); if(c == sel) drawbar(); } } } void quit(const Arg *arg) { readin = running = False; } void resize(Client *c, int x, int y, int w, int h, Bool sizehints) { XWindowChanges wc; if(sizehints) { /* set minimum possible */ w = MAX(1, w); h = MAX(1, h); /* temporarily remove base dimensions */ w -= c->basew; h -= c->baseh; /* adjust for aspect limits */ if(c->mina > 0 && c->maxa > 0) { if(c->maxa < (float) w/h) w = h * c->maxa; else if(c->mina > (float) h/w) h = w * c->mina; } /* adjust for increment value */ if(c->incw) w -= w % c->incw; if(c->inch) h -= h % c->inch; /* restore base dimensions */ w += c->basew; h += c->baseh; w = MAX(w, c->minw); h = MAX(h, c->minh); if (c->maxw) w = MIN(w, c->maxw); if (c->maxh) h = MIN(h, c->maxh); } if(w <= 0 || h <= 0) return; if(x > sx + sw) x = sw - w - 2 * c->bw; if(y > sy + sh) y = sh - h - 2 * c->bw; if(x + w + 2 * c->bw < sx) x = sx; if(y + h + 2 * c->bw < sy) y = sy; if(h < bh) h = bh; if(w < bh) w = bh; if(c->x != x || c->y != y || c->w != w || c->h != h || c->ismoved) { c->ismoved = False; c->x = wc.x = x; c->y = wc.y = y; c->w = wc.width = w; c->h = wc.height = h; wc.border_width = c->bw; XConfigureWindow(dpy, c->win, CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc); configure(c); XSync(dpy, False); } } void resizemouse(Client *c) { int ocx, ocy; int nw, nh; XEvent ev; restack(); ocx = c->x; ocy = c->y; if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync, None, cursor[CurResize], CurrentTime) != GrabSuccess) return; XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1); for(;;) { XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev); switch(ev.type) { case ButtonRelease: XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1); XUngrabPointer(dpy, CurrentTime); while(XCheckMaskEvent(dpy, EnterWindowMask, &ev)); return; case ConfigureRequest: case Expose: case MapRequest: handler[ev.type](&ev); break; case MotionNotify: XSync(dpy, False); nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1); nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1); if(snap && nw >= wx && nw <= wx + ww && nh >= wy && nh <= wy + wh) { if(!c->isfloating && lt->arrange && (abs(nw - c->w) > snap || abs(nh - c->h) > snap)) togglefloating(NULL); } if(!lt->arrange || c->isfloating) resize(c, c->x, c->y, nw, nh, True); break; } } } void restack(void) { Client *c; XEvent ev; XWindowChanges wc; drawbar(); if(!sel) return; if(ismax || sel->isfloating || !lt->arrange) XRaiseWindow(dpy, sel->win); if(!ismax && lt->arrange) { wc.stack_mode = Below; wc.sibling = barwin; for(c = stack; c; c = c->snext) if(!c->isfloating && !c->isbanned) { XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc); wc.sibling = c->win; } } XSync(dpy, False); while(XCheckMaskEvent(dpy, EnterWindowMask, &ev)); } void run(void) { char *p; char sbuf[sizeof stext]; fd_set rd; int r, xfd; uint len, offset; XEvent ev; /* main event loop, also reads status text from stdin */ XSync(dpy, False); xfd = ConnectionNumber(dpy); readin = True; offset = 0; len = sizeof stext - 1; sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */ while(running) { FD_ZERO(&rd); if(readin) FD_SET(STDIN_FILENO, &rd); FD_SET(xfd, &rd); if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) { if(errno == EINTR) continue; eprint("select failed\n"); } if(FD_ISSET(STDIN_FILENO, &rd)) { switch((r = read(STDIN_FILENO, sbuf + offset, len - offset))) { case -1: strncpy(stext, strerror(errno), len); readin = False; break; case 0: strncpy(stext, "EOF", 4); readin = False; break; default: for(p = sbuf + offset; r > 0; p++, r--, offset++) if(*p == '\n' || *p == '\0') { *p = '\0'; strncpy(stext, sbuf, len); p += r - 1; /* p is sbuf + offset + r - 1 */ for(r = 0; *(p - r) && *(p - r) != '\n'; r++); offset = r; if(r) memmove(sbuf, p - r + 1, r); break; } break; } drawbar(); } while(XPending(dpy)) { XNextEvent(dpy, &ev); if(handler[ev.type]) (handler[ev.type])(&ev); /* call handler */ } } } void scan(void) { uint i, num; Window *wins, d1, d2; XWindowAttributes wa; wins = NULL; if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) { for(i = 0; i < num; i++) { if(!XGetWindowAttributes(dpy, wins[i], &wa) || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1)) continue; if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState) manage(wins[i], &wa); } for(i = 0; i < num; i++) { /* now the transients */ if(!XGetWindowAttributes(dpy, wins[i], &wa)) continue; if(XGetTransientForHint(dpy, wins[i], &d1) && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)) manage(wins[i], &wa); } } if(wins) XFree(wins); } void setclientstate(Client *c, long state) { long data[] = {state, None}; XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32, PropModeReplace, (unsigned char *)data, 2); } /* arg > 1.0 will set mfact absolutly */ void setmfact(const Arg *arg) { float f; if(!arg || !lt->arrange) return; f = arg->f < 1.0 ? arg->f + mfact : arg->f - 1.0; if(f < 0.1 || f > 0.9) return; mfact = f; arrange(); } void setup(void) { uint i; int w; XSetWindowAttributes wa; /* init screen */ screen = DefaultScreen(dpy); root = RootWindow(dpy, screen); initfont(FONT); sx = 0; sy = 0; sw = DisplayWidth(dpy, screen); sh = DisplayHeight(dpy, screen); bh = dc.font.height + 2; lt = layouts; updategeom(); /* init atoms */ wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False); wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False); wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False); wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False); netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False); netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False); /* init cursors */ wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr); cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing); cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur); /* init appearance */ dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR); dc.norm[ColBG] = getcolor(NORMBGCOLOR); dc.norm[ColFG] = getcolor(NORMFGCOLOR); dc.sel[ColBorder] = getcolor(SELBORDERCOLOR); dc.sel[ColBG] = getcolor(SELBGCOLOR); dc.sel[ColFG] = getcolor(SELFGCOLOR); initfont(FONT); dc.h = bh; dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), bh, DefaultDepth(dpy, screen)); dc.gc = XCreateGC(dpy, root, 0, 0); XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter); if(!dc.font.set) XSetFont(dpy, dc.gc, dc.font.xfont->fid); /* init bar */ for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) { w = TEXTW(layouts[i].symbol); blw = MAX(blw, w); } wa.override_redirect = 1; wa.background_pixmap = ParentRelative; wa.event_mask = ButtonPressMask|ExposureMask; barwin = XCreateWindow(dpy, root, wx, by, ww, bh, 0, DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen), CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa); XDefineCursor(dpy, barwin, cursor[CurNormal]); XMapRaised(dpy, barwin); strcpy(stext, "dwm-"VERSION); drawbar(); /* EWMH support per view */ XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32, PropModeReplace, (unsigned char *) netatom, NetLast); /* select for events */ wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask |EnterWindowMask|LeaveWindowMask|StructureNotifyMask; XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa); XSelectInput(dpy, root, wa.event_mask); /* grab keys */ grabkeys(); } void spawn(const Arg *arg) { /* The double-fork construct avoids zombie processes and keeps the code * clean from stupid signal handlers. */ if(fork() == 0) { if(fork() == 0) { if(dpy) close(ConnectionNumber(dpy)); setsid(); execvp(((char **)arg->v)[0], (char **)arg->v); fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]); perror(" failed"); } exit(0); } wait(0); } void tag(const Arg *arg) { if(sel && arg->ui & TAGMASK) { sel->tags = arg->ui & TAGMASK; arrange(); } } int textnw(const char *text, uint len) { XRectangle r; if(dc.font.set) { XmbTextExtents(dc.font.set, text, len, NULL, &r); return r.width; } return XTextWidth(dc.font.xfont, text, len); } void tile(void) { int x, y, h, w, mw; uint i, n; Client *c; for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next), n++); if(n == 0) return; /* master */ c = nexttiled(clients); mw = mfact * ww; resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints); if(--n == 0) return; /* tile stack */ x = (wx + mw > c->x + c->w) ? c->x + c->w + 2 * c->bw : wx + mw; y = wy; w = (wx + mw > c->x + c->w) ? wx + ww - x : ww - mw; h = wh / n; if(h < bh) h = wh; for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) { resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n) ? (wy + wh) - y : h) - 2 * c->bw, resizehints); if(h != wh) y = c->y + c->h + 2 * c->bw; } } void togglebar(const Arg *arg) { showbar = !showbar; updategeom(); updatebar(); arrange(); } void togglefloating(const Arg *arg) { if(!sel) return; sel->isfloating = !sel->isfloating || sel->isfixed; if(sel->isfloating) resize(sel, sel->x, sel->y, sel->w, sel->h, True); arrange(); } void togglelayout(const Arg *arg) { if(arg->v) lt = (Layout *)arg->v; else if(++lt == &layouts[LENGTH(layouts)]) lt = &layouts[0]; if(sel) arrange(); else drawbar(); } void togglemax(const Arg *arg) { ismax = !ismax; arrange(); } void toggletag(const Arg *arg) { if(sel && (sel->tags ^= (arg->ui & TAGMASK))) arrange(); } void toggleview(const Arg *arg) { if((tagset[seltags] ^= (arg->ui & TAGMASK))) arrange(); } void unmanage(Client *c) { XWindowChanges wc; wc.border_width = c->oldbw; /* The server grab construct avoids race conditions. */ XGrabServer(dpy); XSetErrorHandler(xerrordummy); XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */ detach(c); detachstack(c); if(sel == c) focus(NULL); XUngrabButton(dpy, AnyButton, AnyModifier, c->win); setclientstate(c, WithdrawnState); free(c); XSync(dpy, False); XSetErrorHandler(xerror); XUngrabServer(dpy); arrange(); } void unmapnotify(XEvent *e) { Client *c; XUnmapEvent *ev = &e->xunmap; if((c = getclient(ev->window))) unmanage(c); } void updatebar(void) { if(dc.drawable != 0) XFreePixmap(dpy, dc.drawable); dc.drawable = XCreatePixmap(dpy, root, ww, bh, DefaultDepth(dpy, screen)); XMoveResizeWindow(dpy, barwin, wx, by, ww, bh); } void updategeom(void) { #ifdef XINERAMA int i; XineramaScreenInfo *info = NULL; /* window area geometry */ if(XineramaIsActive(dpy)) { info = XineramaQueryScreens(dpy, &i); wx = info[0].x_org; wy = showbar && topbar ? info[0].y_org + bh : info[0].y_org; ww = info[0].width; wh = showbar ? info[0].height - bh : info[0].height; XFree(info); } else #endif { wx = sx; wy = showbar && topbar ? sy + bh : sy; ww = sw; wh = showbar ? sh - bh : sh; } /* bar position */ by = showbar ? (topbar ? wy - bh : wy + wh) : -bh; } void updatesizehints(Client *c) { long msize; XSizeHints size; XGetWMNormalHints(dpy, c->win, &size, &msize); if(size.flags & PBaseSize) { c->basew = size.base_width; c->baseh = size.base_height; } else if(size.flags & PMinSize) { c->basew = size.min_width; c->baseh = size.min_height; } else c->basew = c->baseh = 0; if(size.flags & PResizeInc) { c->incw = size.width_inc; c->inch = size.height_inc; } else c->incw = c->inch = 0; if(size.flags & PMaxSize) { c->maxw = size.max_width; c->maxh = size.max_height; } else c->maxw = c->maxh = 0; if(size.flags & PMinSize) { c->minw = size.min_width; c->minh = size.min_height; } else if(size.flags & PBaseSize) { c->minw = size.base_width; c->minh = size.base_height; } else c->minw = c->minh = 0; if(size.flags & PAspect) { c->mina = (float)size.min_aspect.y / (float)size.min_aspect.x; c->maxa = (float)size.max_aspect.x / (float)size.max_aspect.y; } else c->maxa = c->mina = 0.0; c->isfixed = (c->maxw && c->minw && c->maxh && c->minh && c->maxw == c->minw && c->maxh == c->minh); } void updatetitle(Client *c) { if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name)) gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name); } void updatewmhints(Client *c) { XWMHints *wmh; if((wmh = XGetWMHints(dpy, c->win))) { if(c == sel) sel->isurgent = False; else c->isurgent = (wmh->flags & XUrgencyHint) ? True : False; XFree(wmh); } } void view(const Arg *arg) { seltags ^= 1; /* toggle sel tagset */ if(arg && (arg->ui & TAGMASK)) tagset[seltags] = arg->i & TAGMASK; arrange(); } /* 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) { if(ee->error_code == BadWindow || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch) || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable) || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable) || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable) || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch) || (ee->request_code == X_GrabButton && ee->error_code == BadAccess) || (ee->request_code == X_GrabKey && ee->error_code == BadAccess) || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable)) return 0; fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n", ee->request_code, ee->error_code); return xerrorxlib(dpy, ee); /* may call exit */ } int xerrordummy(Display *dpy, XErrorEvent *ee) { return 0; } /* Startup Error handler to check if another window manager * is already running. */ int xerrorstart(Display *dpy, XErrorEvent *ee) { otherwm = True; return -1; } void zoom(const Arg *arg) { Client *c = sel; if(ismax || !lt->arrange || (sel && sel->isfloating)) return; if(c == nexttiled(clients)) if(!c || !(c = nexttiled(c->next))) return; detach(c); attach(c); focus(c); arrange(); } int main(int argc, char *argv[]) { if(argc == 2 && !strcmp("-v", argv[1])) eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n"); else if(argc != 1) eprint("usage: dwm [-v]\n"); setlocale(LC_CTYPE, ""); if(!(dpy = XOpenDisplay(0))) eprint("dwm: cannot open display\n"); checkotherwm(); setup(); scan(); run(); cleanup(); XCloseDisplay(dpy); return 0; }