+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <locale.h>
+#include <regex.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/select.h>
+#include <sys/wait.h>
+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xatom.h>
+#include <X11/Xproto.h>
+#include <X11/Xutil.h>
+
+/* macros */
+#define BUTTONMASK (ButtonPressMask | ButtonReleaseMask)
+#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
+#define MOUSEMASK (BUTTONMASK | PointerMotionMask)
+
+/* enums */
+enum { BarTop, BarBot, BarOff }; /* bar position */
+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 struct Client Client;
+struct Client {
+ char name[256];
+ int x, y, w, h;
+ int rx, ry, rw, rh; /* revert geometry */
+ int basew, baseh, incw, inch, maxw, maxh, minw, minh;
+ int minax, maxax, minay, maxay;
+ long flags;
+ unsigned int border, oldborder;
+ Bool isbanned, isfixed, ismax, isfloating;
+ Bool *tags;
+ Client *next;
+ Client *prev;
+ Client *snext;
+ Window win;
+};
+
+typedef struct {
+ int x, y, w, h;
+ unsigned long norm[ColLast];
+ unsigned long sel[ColLast];
+ Drawable drawable;
+ GC gc;
+ struct {
+ int ascent;
+ int descent;
+ int height;
+ XFontSet set;
+ XFontStruct *xfont;
+ } font;
+} DC; /* draw context */
+
+typedef struct {
+ unsigned long mod;
+ KeySym keysym;
+ void (*func)(const char *arg);
+ const char *arg;
+} Key;
+
+typedef struct {
+ const char *symbol;
+ void (*arrange)(void);
+} Layout;
+
+typedef struct {
+ const char *prop;
+ const char *tags;
+ Bool isfloating;
+} Rule;
+
+typedef struct {
+ regex_t *propregex;
+ regex_t *tagregex;
+} Regs;
+
+/* functions */
+static void eprint(const char *errstr, ...);
+static void *emallocz(unsigned int size);
+static void spawn(const char *arg);
+static void drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]);
+static unsigned long initcolor(const char *colstr);
+static void initfont(const char *fontstr);
+static Bool isoccupied(unsigned int t);
+static unsigned int textnw(const char *text, unsigned int len);
+static void drawtext(const char *text, unsigned long col[ColLast]);
+static void drawbar(void);
+static void initstyle(void);
+static void initbar(void);
+static unsigned int textw(const char *text);
+static void togglebar(const char *arg);
+static void updatebarpos(void);
+static void attachstack(Client *c);
+static void detachstack(Client *c);
+static void grabbuttons(Client *c, Bool focused);
+static Bool isprotodel(Client *c);
+static void setclientstate(Client *c, long state);
+static int xerrordummy(Display *dsply, XErrorEvent *ee);
+static void ban(Client *c);
+static void configure(Client *c);
+static void killclient(const char *arg);
+static void manage(Window w, XWindowAttributes *wa);
+static void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
+static void unban(Client *c);
+static void unmanage(Client *c);
+static void updatesizehints(Client *c);
+static void updatetitle(Client *c);
+static Client *getclient(Window w);
+static void movemouse(Client *c);
+static void resizemouse(Client *c);
+static void buttonpress(XEvent *e);
+static void configurerequest(XEvent *e);
+static void configurenotify(XEvent *e);
+static void destroynotify(XEvent *e);
+static void enternotify(XEvent *e);
+static void expose(XEvent *e);
+static void keypress(XEvent *e);
+static void leavenotify(XEvent *e);
+static void mappingnotify(XEvent *e);
+static void maprequest(XEvent *e);
+static void propertynotify(XEvent *e);
+static void unmapnotify(XEvent *e);
+static void grabkeys(void);
+static unsigned int idxoftag(const char *tag);
+static void floating(void); /* default floating layout */
+static void applyrules(Client *c);
+static void compileregs(void);
+static void focusnext(const char *arg);
+static void focusprev(const char *arg);
+static void initlayouts(void);
+static Bool isfloating(void);
+static Bool isvisible(Client *c);
+static void restack(void);
+static void setlayout(const char *arg);
+static void tag(const char *arg);
+static void togglefloating(const char *arg);
+static void togglemax(const char *arg);
+static void toggletag(const char *arg);
+static void toggleview(const char *arg);
+static void view(const char *arg);
+static void cleanup(void);
+static long getstate(Window w);
+static void scan(void);
+static void setup(void);
+static int xerrorstart(Display *dsply, XErrorEvent *ee);
+static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
+static void quit(const char *arg);
+static int xerror(Display *dpy, XErrorEvent *ee);
+static void arrange(void);
+static void attach(Client *c);
+static void detach(Client *c);
+static void focus(Client *c);
+static Bool isarrange(void (*func)());
+static Client *nexttiled(Client *c);
+static void setmwfact(const char *arg);
+static void tile(void);
+static void zoom(const char *arg);
+
+#include "config.h"
+
+/* variables */
+static char stext[256];
+static double mwfact = MWFACT;
+static int screen, sx, sy, sw, sh, wax, way, waw, wah;
+static int (*xerrorxlib)(Display *, XErrorEvent *);
+static unsigned int bh;
+static unsigned int blw = 0;
+static unsigned int bpos = BARPOS;
+static unsigned int ltidx = 0; /* default */
+static unsigned int nlayouts = 0;
+static unsigned int nrules = 0;
+static unsigned int ntags;
+static unsigned int numlockmask = 0;
+static void (*handler[LASTEvent]) (XEvent *) = {
+ [ButtonPress] = buttonpress,
+ [ConfigureRequest] = configurerequest,
+ [ConfigureNotify] = configurenotify,
+ [DestroyNotify] = destroynotify,
+ [EnterNotify] = enternotify,
+ [LeaveNotify] = leavenotify,
+ [Expose] = expose,
+ [KeyPress] = keypress,
+ [MappingNotify] = mappingnotify,
+ [MapRequest] = maprequest,
+ [PropertyNotify] = propertynotify,
+ [UnmapNotify] = unmapnotify
+};
+static Atom wmatom[WMLast], netatom[NetLast];
+static Bool otherwm, readin;
+static Bool running = True;
+static Bool *seltags;
+static Bool selscreen = True;
+static Client *clients = NULL;
+static Client *sel = NULL;
+static Client *stack = NULL;
+static Cursor cursor[CurLast];
+static Display *dpy;
+static DC dc = {0};
+static Window barwin, root;
+static Regs *regs = NULL;
+
+static void
+eprint(const char *errstr, ...) {
+ va_list ap;
+
+ va_start(ap, errstr);
+ vfprintf(stderr, errstr, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
+}
+
+static void *
+emallocz(unsigned int size) {
+ void *res = calloc(1, size);
+
+ if(!res)
+ eprint("fatal: could not malloc() %u bytes\n", size);
+ return res;
+}
+
+static void
+spawn(const char *arg) {
+ static char *shell = NULL;
+
+ if(!shell && !(shell = getenv("SHELL")))
+ shell = "/bin/sh";
+ if(!arg)
+ return;
+ /* 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();
+ execl(shell, shell, "-c", arg, (char *)NULL);
+ fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
+ perror(" failed");
+ }
+ exit(0);
+ }
+ wait(0);
+}
+
+static void
+drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
+ int x;
+ XGCValues gcv;
+ XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+ gcv.foreground = col[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);
+ }
+}
+
+static unsigned long
+initcolor(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;
+}
+
+static 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++) {
+ if(dc.font.ascent < (*xfonts)->ascent)
+ dc.font.ascent = (*xfonts)->ascent;
+ if(dc.font.descent < (*xfonts)->descent)
+ 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;
+}
+
+static Bool
+isoccupied(unsigned int t) {
+ Client *c;
+
+ for(c = clients; c; c = c->next)
+ if(c->tags[t])
+ return True;
+ return False;
+}
+
+static unsigned int
+textnw(const char *text, unsigned int 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);
+}
+
+static void
+drawtext(const char *text, unsigned long col[ColLast]) {
+ int x, y, w, h;
+ static char buf[256];
+ unsigned int len, olen;
+ XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+
+ XSetForeground(dpy, dc.gc, col[ColBG]);
+ XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+ if(!text)
+ return;
+ w = 0;
+ olen = len = strlen(text);
+ if(len >= sizeof buf)
+ len = sizeof buf - 1;
+ memcpy(buf, text, len);
+ buf[len] = 0;
+ 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 */
+ while(len && (w = textnw(buf, len)) > dc.w - h)
+ buf[--len] = 0;
+ if(len < olen) {
+ if(len > 1)
+ buf[len - 1] = '.';
+ if(len > 2)
+ buf[len - 2] = '.';
+ if(len > 3)
+ buf[len - 3] = '.';
+ }
+ if(w > dc.w)
+ return; /* too long */
+ XSetForeground(dpy, dc.gc, col[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);
+}
+
+static void
+drawbar(void) {
+ int i, x;
+
+ dc.x = dc.y = 0;
+ for(i = 0; i < ntags; i++) {
+ dc.w = textw(tags[i]);
+ if(seltags[i]) {
+ drawtext(tags[i], dc.sel);
+ drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
+ }
+ else {
+ drawtext(tags[i], dc.norm);
+ drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
+ }
+ dc.x += dc.w;
+ }
+ dc.w = blw;
+ drawtext(layouts[ltidx].symbol, dc.norm);
+ x = dc.x + dc.w;
+ dc.w = textw(stext);
+ dc.x = sw - dc.w;
+ if(dc.x < x) {
+ dc.x = x;
+ dc.w = sw - x;
+ }
+ drawtext(stext, dc.norm);
+ if((dc.w = dc.x - x) > bh) {
+ dc.x = x;
+ if(sel) {
+ drawtext(sel->name, dc.sel);
+ drawsquare(sel->ismax, sel->isfloating, dc.sel);
+ }
+ else
+ drawtext(NULL, dc.norm);
+ }
+ XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
+ XSync(dpy, False);
+}
+
+static void
+initstyle(void) {
+ dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
+ dc.norm[ColBG] = initcolor(NORMBGCOLOR);
+ dc.norm[ColFG] = initcolor(NORMFGCOLOR);
+ dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
+ dc.sel[ColBG] = initcolor(SELBGCOLOR);
+ dc.sel[ColFG] = initcolor(SELFGCOLOR);
+ initfont(FONT);
+ dc.h = bh = dc.font.height + 2;
+}
+
+static void
+initbar(void) {
+ XSetWindowAttributes wa;
+
+ wa.override_redirect = 1;
+ wa.background_pixmap = ParentRelative;
+ wa.event_mask = ButtonPressMask | ExposureMask;
+ barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
+ DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
+ CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
+ XDefineCursor(dpy, barwin, cursor[CurNormal]);
+ updatebarpos();
+ XMapRaised(dpy, barwin);
+ strcpy(stext, "dwm-"VERSION);
+ dc.drawable = XCreatePixmap(dpy, root, sw, 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);
+}
+
+static unsigned int
+textw(const char *text) {
+ return textnw(text, strlen(text)) + dc.font.height;
+}
+
+static void
+togglebar(const char *arg) {
+ if(bpos == BarOff)
+ bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
+ else
+ bpos = BarOff;
+ updatebarpos();
+ arrange();
+}
+
+static void
+updatebarpos(void) {
+ XEvent ev;
+
+ wax = sx;
+ way = sy;
+ wah = sh;
+ waw = sw;
+ switch(bpos) {
+ default:
+ wah -= bh;
+ way += bh;
+ XMoveWindow(dpy, barwin, sx, sy);
+ break;
+ case BarBot:
+ wah -= bh;
+ XMoveWindow(dpy, barwin, sx, sy + wah);
+ break;
+ case BarOff:
+ XMoveWindow(dpy, barwin, sx, sy - bh);
+ break;
+ }
+ XSync(dpy, False);
+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+attachstack(Client *c) {
+ c->snext = stack;
+ stack = c;
+}
+
+static void
+detachstack(Client *c) {
+ Client **tc;
+
+ for(tc=&stack; *tc && *tc != c; tc=&(*tc)->snext);
+ *tc = c->snext;
+}
+
+static void
+grabbuttons(Client *c, Bool focused) {
+ XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
+
+ if(focused) {
+ XGrabButton(dpy, Button1, MODKEY, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button1, MODKEY | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button1, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button1, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+
+ XGrabButton(dpy, Button2, MODKEY, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button2, MODKEY | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button2, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button2, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+
+ XGrabButton(dpy, Button3, MODKEY, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button3, MODKEY | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button3, MODKEY | numlockmask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ XGrabButton(dpy, Button3, MODKEY | numlockmask | LockMask, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+ }
+ else
+ XGrabButton(dpy, AnyButton, AnyModifier, c->win, False, BUTTONMASK,
+ GrabModeAsync, GrabModeSync, None, None);
+}
+
+static 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;
+}
+
+static void
+setclientstate(Client *c, long state) {
+ long data[] = {state, None};
+
+ XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
+ PropModeReplace, (unsigned char *)data, 2);
+}
+
+static int
+xerrordummy(Display *dsply, XErrorEvent *ee) {
+ return 0;
+}
+
+static void
+ban(Client *c) {
+ if(c->isbanned)
+ return;
+ XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+ c->isbanned = True;
+}
+
+static void
+configure(Client *c) {
+ XConfigureEvent ce;
+
+ ce.type = ConfigureNotify;
+ ce.display = dpy;
+ ce.event = c->win;
+ ce.window = c->win;
+ ce.x = c->x;
+ ce.y = c->y;
+ ce.width = c->w;
+ ce.height = c->h;
+ ce.border_width = c->border;
+ ce.above = None;
+ ce.override_redirect = False;
+ XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
+}
+
+static void
+killclient(const char *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);
+}
+
+static void
+manage(Window w, XWindowAttributes *wa) {
+ unsigned int i;
+ Client *c, *t = NULL;
+ Window trans;
+ Status rettrans;
+ XWindowChanges wc;
+
+ c = emallocz(sizeof(Client));
+ c->tags = emallocz(ntags * sizeof(Bool));
+ c->win = w;
+ c->x = wa->x;
+ c->y = wa->y;
+ c->w = wa->width;
+ c->h = wa->height;
+ c->oldborder = wa->border_width;
+ if(c->w == sw && c->h == sh) {
+ c->x = sx;
+ c->y = sy;
+ c->border = wa->border_width;
+ }
+ else {
+ if(c->x + c->w + 2 * c->border > wax + waw)
+ c->x = wax + waw - c->w - 2 * c->border;
+ if(c->y + c->h + 2 * c->border > way + wah)
+ c->y = way + wah - c->h - 2 * c->border;
+ if(c->x < wax)
+ c->x = wax;
+ if(c->y < way)
+ c->y = way;
+ c->border = BORDERPX;
+ }
+ wc.border_width = c->border;
+ 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,
+ StructureNotifyMask | PropertyChangeMask | EnterWindowMask);
+ grabbuttons(c, False);
+ updatetitle(c);
+ if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
+ for(t = clients; t && t->win != trans; t = t->next);
+ if(t)
+ for(i = 0; i < ntags; i++)
+ c->tags[i] = t->tags[i];
+ applyrules(c);
+ if(!c->isfloating)
+ c->isfloating = (rettrans == Success) || c->isfixed;
+ attach(c);
+ attachstack(c);
+ XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
+ ban(c);
+ XMapWindow(dpy, c->win);
+ setclientstate(c, NormalState);
+ arrange();
+}
+
+static void
+resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
+ double dx, dy, max, min, ratio;
+ XWindowChanges wc;
+
+ if(sizehints) {
+ if(c->minay > 0 && c->maxay > 0 && (h - c->baseh) > 0 && (w - c->basew) > 0) {
+ dx = (double)(w - c->basew);
+ dy = (double)(h - c->baseh);
+ min = (double)(c->minax) / (double)(c->minay);
+ max = (double)(c->maxax) / (double)(c->maxay);
+ ratio = dx / dy;
+ if(max > 0 && min > 0 && ratio > 0) {
+ if(ratio < min) {
+ dy = (dx * min + dy) / (min * min + 1);
+ dx = dy * min;
+ w = (int)dx + c->basew;
+ h = (int)dy + c->baseh;
+ }
+ else if(ratio > max) {
+ dy = (dx * min + dy) / (max * max + 1);
+ dx = dy * min;
+ w = (int)dx + c->basew;
+ h = (int)dy + c->baseh;
+ }
+ }
+ }
+ if(c->minw && w < c->minw)
+ w = c->minw;
+ if(c->minh && h < c->minh)
+ h = c->minh;
+ if(c->maxw && w > c->maxw)
+ w = c->maxw;
+ if(c->maxh && h > c->maxh)
+ h = c->maxh;
+ if(c->incw)
+ w -= (w - c->basew) % c->incw;
+ if(c->inch)
+ h -= (h - c->baseh) % c->inch;
+ }
+ if(w <= 0 || h <= 0)
+ return;
+ /* offscreen appearance fixes */
+ if(x > sw)
+ x = sw - w - 2 * c->border;
+ if(y > sh)
+ y = sh - h - 2 * c->border;
+ if(x + w + 2 * c->border < sx)
+ x = sx;
+ if(y + h + 2 * c->border < sy)
+ y = sy;
+ if(c->x != x || c->y != y || c->w != w || c->h != h) {
+ c->x = wc.x = x;
+ c->y = wc.y = y;
+ c->w = wc.width = w;
+ c->h = wc.height = h;
+ wc.border_width = c->border;
+ XConfigureWindow(dpy, c->win, CWX | CWY | CWWidth | CWHeight | CWBorderWidth, &wc);
+ configure(c);
+ XSync(dpy, False);
+ }
+}
+
+static void
+unban(Client *c) {
+ if(!c->isbanned)
+ return;
+ XMoveWindow(dpy, c->win, c->x, c->y);
+ c->isbanned = False;
+}
+
+static void
+unmanage(Client *c) {
+ XWindowChanges wc;
+
+ wc.border_width = c->oldborder;
+ /* 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->tags);
+ free(c);
+ XSync(dpy, False);
+ XSetErrorHandler(xerror);
+ XUngrabServer(dpy);
+ arrange();
+}
+
+static void
+updatesizehints(Client *c) {
+ long msize;
+ XSizeHints size;
+
+ if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
+ size.flags = PSize;
+ c->flags = size.flags;
+ if(c->flags & PBaseSize) {
+ c->basew = size.base_width;
+ c->baseh = size.base_height;
+ }
+ else if(c->flags & PMinSize) {
+ c->basew = size.min_width;
+ c->baseh = size.min_height;
+ }
+ else
+ c->basew = c->baseh = 0;
+ if(c->flags & PResizeInc) {
+ c->incw = size.width_inc;
+ c->inch = size.height_inc;
+ }
+ else
+ c->incw = c->inch = 0;
+ if(c->flags & PMaxSize) {
+ c->maxw = size.max_width;
+ c->maxh = size.max_height;
+ }
+ else
+ c->maxw = c->maxh = 0;
+ if(c->flags & PMinSize) {
+ c->minw = size.min_width;
+ c->minh = size.min_height;
+ }
+ else if(c->flags & PBaseSize) {
+ c->minw = size.base_width;
+ c->minh = size.base_height;
+ }
+ else
+ c->minw = c->minh = 0;
+ if(c->flags & PAspect) {
+ c->minax = size.min_aspect.x;
+ c->maxax = size.max_aspect.x;
+ c->minay = size.min_aspect.y;
+ c->maxay = size.max_aspect.y;
+ }
+ else
+ c->minax = c->maxax = c->minay = c->maxay = 0;
+ c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
+ && c->maxw == c->minw && c->maxh == c->minh);
+}
+
+static 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);
+}
+
+static Client *
+getclient(Window w) {
+ Client *c;
+
+ for(c = clients; c && c->win != w; c = c->next);
+ return c;
+}
+
+static void
+movemouse(Client *c) {
+ int x1, y1, ocx, ocy, di, nx, ny;
+ unsigned int dui;
+ Window dummy;
+ XEvent ev;
+
+ ocx = nx = c->x;
+ ocy = ny = c->y;
+ if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+ None, cursor[CurMove], CurrentTime) != GrabSuccess)
+ return;
+ c->ismax = False;
+ 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(abs(wax + nx) < SNAP)
+ nx = wax;
+ else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
+ nx = wax + waw - c->w - 2 * c->border;
+ if(abs(way - ny) < SNAP)
+ ny = way;
+ else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
+ ny = way + wah - c->h - 2 * c->border;
+ resize(c, nx, ny, c->w, c->h, False);
+ break;
+ }
+ }
+}
+
+static void
+resizemouse(Client *c) {
+ int ocx, ocy;
+ int nw, nh;
+ XEvent ev;
+
+ ocx = c->x;
+ ocy = c->y;
+ if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
+ None, cursor[CurResize], CurrentTime) != GrabSuccess)
+ return;
+ c->ismax = False;
+ XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 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->border - 1, c->h + c->border - 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);
+ if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
+ nw = 1;
+ if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
+ nh = 1;
+ resize(c, c->x, c->y, nw, nh, True);
+ break;
+ }
+ }
+}
+
+static void
+buttonpress(XEvent *e) {
+ unsigned int i, x;
+ Client *c;
+ XButtonPressedEvent *ev = &e->xbutton;
+
+ if(barwin == ev->window) {
+ x = 0;
+ for(i = 0; i < ntags; i++) {
+ x += textw(tags[i]);
+ if(ev->x < x) {
+ if(ev->button == Button1) {
+ if(ev->state & MODKEY)
+ tag(tags[i]);
+ else
+ view(tags[i]);
+ }
+ else if(ev->button == Button3) {
+ if(ev->state & MODKEY)
+ toggletag(tags[i]);
+ else
+ toggleview(tags[i]);
+ }
+ return;
+ }
+ }
+ if((ev->x < x + blw) && ev->button == Button1)
+ setlayout(NULL);
+ }
+ else if((c = getclient(ev->window))) {
+ focus(c);
+ if(CLEANMASK(ev->state) != MODKEY)
+ return;
+ if(ev->button == Button1 && (isfloating() || c->isfloating)) {
+ restack();
+ movemouse(c);
+ }
+ else if(ev->button == Button2)
+ zoom(NULL);
+ else if(ev->button == Button3
+ && (isfloating() || c->isfloating) && !c->isfixed)
+ {
+ restack();
+ resizemouse(c);
+ }
+ }
+}
+
+static void
+configurerequest(XEvent *e) {
+ Client *c;
+ XConfigureRequestEvent *ev = &e->xconfigurerequest;
+ XWindowChanges wc;
+
+ if((c = getclient(ev->window))) {
+ c->ismax = False;
+ if(ev->value_mask & CWBorderWidth)
+ c->border = ev->border_width;
+ if(c->isfixed || c->isfloating || isfloating()) {
+ if(ev->value_mask & CWX)
+ c->x = ev->x;
+ if(ev->value_mask & CWY)
+ c->y = ev->y;
+ if(ev->value_mask & CWWidth)
+ c->w = ev->width;
+ if(ev->value_mask & CWHeight)
+ c->h = ev->height;
+ if((c->x + c->w) > sw && c->isfloating)
+ c->x = sw / 2 - c->w / 2; /* center in x direction */
+ if((c->y + c->h) > sh && c->isfloating)
+ c->y = sh / 2 - c->h / 2; /* center in y direction */
+ if((ev->value_mask & (CWX | CWY))
+ && !(ev->value_mask & (CWWidth | CWHeight)))
+ configure(c);
+ if(isvisible(c))
+ 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);
+}
+
+static void
+configurenotify(XEvent *e) {
+ XConfigureEvent *ev = &e->xconfigure;
+
+ if (ev->window == root && (ev->width != sw || ev->height != sh)) {
+ sw = ev->width;
+ sh = ev->height;
+ XFreePixmap(dpy, dc.drawable);
+ dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+ XResizeWindow(dpy, barwin, sw, bh);
+ updatebarpos();
+ arrange();
+ }
+}
+
+static void
+destroynotify(XEvent *e) {
+ Client *c;
+ XDestroyWindowEvent *ev = &e->xdestroywindow;
+
+ if((c = getclient(ev->window)))
+ unmanage(c);
+}
+
+static void
+enternotify(XEvent *e) {
+ Client *c;
+ XCrossingEvent *ev = &e->xcrossing;
+
+ if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
+ return;
+ if((c = getclient(ev->window)))
+ focus(c);
+ else if(ev->window == root) {
+ selscreen = True;
+ focus(NULL);
+ }
+}
+
+static void
+expose(XEvent *e) {
+ XExposeEvent *ev = &e->xexpose;
+
+ if(ev->count == 0) {
+ if(barwin == ev->window)
+ drawbar();
+ }
+}
+
+static void
+keypress(XEvent *e) {
+ KEYS
+ unsigned int len = sizeof keys / sizeof keys[0];
+ unsigned int i;
+ KeySym keysym;
+ XKeyEvent *ev = &e->xkey;
+
+ keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
+ for(i = 0; i < len; i++)
+ if(keysym == keys[i].keysym
+ && CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
+ {
+ if(keys[i].func)
+ keys[i].func(keys[i].arg);
+ }
+}
+
+static void
+leavenotify(XEvent *e) {
+ XCrossingEvent *ev = &e->xcrossing;
+
+ if((ev->window == root) && !ev->same_screen) {
+ selscreen = False;
+ focus(NULL);
+ }
+}
+
+static void
+mappingnotify(XEvent *e) {
+ XMappingEvent *ev = &e->xmapping;
+
+ XRefreshKeyboardMapping(ev);
+ if(ev->request == MappingKeyboard)
+ grabkeys();
+}
+
+static 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);
+}
+
+static 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;
+ }
+ if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
+ updatetitle(c);
+ if(c == sel)
+ drawbar();
+ }
+ }
+}
+
+static void
+unmapnotify(XEvent *e) {
+ Client *c;
+ XUnmapEvent *ev = &e->xunmap;
+
+ if((c = getclient(ev->window)))
+ unmanage(c);
+}
+
+static void
+grabkeys(void) {
+ KEYS
+ unsigned int len = sizeof keys / sizeof keys[0];
+ unsigned int i;
+ KeyCode code;
+
+ XUngrabKey(dpy, AnyKey, AnyModifier, root);
+ for(i = 0; i < len; 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);
+ }
+}
+
+static unsigned int
+idxoftag(const char *tag) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ if(tags[i] == tag)
+ return i;
+ return 0;
+}
+
+static void
+floating(void) { /* default floating layout */
+ Client *c;
+
+ for(c = clients; c; c = c->next)
+ if(isvisible(c))
+ resize(c, c->x, c->y, c->w, c->h, True);
+}
+
+static void
+applyrules(Client *c) {
+ static char buf[512];
+ unsigned int i, j;
+ regmatch_t tmp;
+ Bool matched = False;
+ XClassHint ch = { 0 };
+
+ /* rule matching */
+ XGetClassHint(dpy, c->win, &ch);
+ snprintf(buf, sizeof buf, "%s:%s:%s",
+ ch.res_class ? ch.res_class : "",
+ ch.res_name ? ch.res_name : "", c->name);
+ for(i = 0; i < nrules; i++)
+ if(regs[i].propregex && !regexec(regs[i].propregex, buf, 1, &tmp, 0)) {
+ c->isfloating = rules[i].isfloating;
+ for(j = 0; regs[i].tagregex && j < ntags; j++) {
+ if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
+ matched = True;
+ c->tags[j] = True;
+ }
+ }
+ }
+ if(ch.res_class)
+ XFree(ch.res_class);
+ if(ch.res_name)
+ XFree(ch.res_name);
+ if(!matched)
+ for(i = 0; i < ntags; i++)
+ c->tags[i] = seltags[i];
+}
+
+static void
+compileregs(void) {
+ unsigned int i;
+ regex_t *reg;
+
+ if(regs)
+ return;
+ nrules = sizeof rules / sizeof rules[0];
+ regs = emallocz(nrules * sizeof(Regs));
+ for(i = 0; i < nrules; i++) {
+ if(rules[i].prop) {
+ reg = emallocz(sizeof(regex_t));
+ if(regcomp(reg, rules[i].prop, REG_EXTENDED))
+ free(reg);
+ else
+ regs[i].propregex = reg;
+ }
+ if(rules[i].tags) {
+ reg = emallocz(sizeof(regex_t));
+ if(regcomp(reg, rules[i].tags, REG_EXTENDED))
+ free(reg);
+ else
+ regs[i].tagregex = reg;
+ }
+ }
+}
+
+static void
+focusnext(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->next; c && !isvisible(c); c = c->next);
+ if(!c)
+ for(c = clients; c && !isvisible(c); c = c->next);
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+static void
+focusprev(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->prev; c && !isvisible(c); c = c->prev);
+ if(!c) {
+ for(c = clients; c && c->next; c = c->next);
+ for(; c && !isvisible(c); c = c->prev);
+ }
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+static void
+initlayouts(void) {
+ unsigned int i, w;
+
+ nlayouts = sizeof layouts / sizeof layouts[0];
+ for(blw = i = 0; i < nlayouts; i++) {
+ w = textw(layouts[i].symbol);
+ if(w > blw)
+ blw = w;
+ }
+}
+
+static Bool
+isfloating(void) {
+ return layouts[ltidx].arrange == floating;
+}
+
+static Bool
+isvisible(Client *c) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ if(c->tags[i] && seltags[i])
+ return True;
+ return False;
+}
+
+static void
+restack(void) {
+ Client *c;
+ XEvent ev;
+ XWindowChanges wc;
+
+ drawbar();
+ if(!sel)
+ return;
+ if(sel->isfloating || isfloating())
+ XRaiseWindow(dpy, sel->win);
+ if(!isfloating()) {
+ wc.stack_mode = Below;
+ wc.sibling = barwin;
+ if(!sel->isfloating) {
+ XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
+ wc.sibling = sel->win;
+ }
+ for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
+ if(c == sel)
+ continue;
+ XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
+ wc.sibling = c->win;
+ }
+ }
+ XSync(dpy, False);
+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+setlayout(const char *arg) {
+ unsigned int i;
+
+ if(!arg) {
+ if(++ltidx == nlayouts)
+ ltidx = 0;;
+ }
+ else {
+ for(i = 0; i < nlayouts; i++)
+ if(!strcmp(arg, layouts[i].symbol))
+ break;
+ if(i == nlayouts)
+ return;
+ ltidx = i;
+ }
+ if(sel)
+ arrange();
+ else
+ drawbar();
+}
+
+static void
+tag(const char *arg) {
+ unsigned int i;
+
+ if(!sel)
+ return;
+ for(i = 0; i < ntags; i++)
+ sel->tags[i] = arg == NULL;
+ i = idxoftag(arg);
+ if(i >= 0 && i < ntags)
+ sel->tags[i] = True;
+ arrange();
+}
+
+static void
+togglefloating(const char *arg) {
+ if(!sel)
+ return;
+ sel->isfloating = !sel->isfloating;
+ if(sel->isfloating)
+ resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+ arrange();
+}
+
+static void
+togglemax(const char *arg) {
+ XEvent ev;
+
+ if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
+ return;
+ if((sel->ismax = !sel->ismax)) {
+ sel->rx = sel->x;
+ sel->ry = sel->y;
+ sel->rw = sel->w;
+ sel->rh = sel->h;
+ resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
+ }
+ else
+ resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
+ drawbar();
+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+static void
+toggletag(const char *arg) {
+ unsigned int i, j;
+
+ if(!sel)
+ return;
+ i = idxoftag(arg);
+ sel->tags[i] = !sel->tags[i];
+ for(j = 0; j < ntags && !sel->tags[j]; j++);
+ if(j == ntags)
+ sel->tags[i] = True;
+ arrange();
+}
+
+static void
+toggleview(const char *arg) {
+ unsigned int i, j;
+
+ i = idxoftag(arg);
+ seltags[i] = !seltags[i];
+ for(j = 0; j < ntags && !seltags[j]; j++);
+ if(j == ntags)
+ seltags[i] = True; /* cannot toggle last view */
+ arrange();
+}
+
+static void
+view(const char *arg) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ seltags[i] = arg == NULL;
+ i = idxoftag(arg);
+ if(i >= 0 && i < ntags)
+ seltags[i] = True;
+ arrange();
+}
+
+static void
+cleanup(void) {
+ close(STDIN_FILENO);
+ while(stack) {
+ unban(stack);
+ unmanage(stack);
+ }
+ if(dc.font.set)
+ XFreeFontSet(dpy, dc.font.set);
+ else
+ XFreeFont(dpy, dc.font.xfont);
+ XUngrabKey(dpy, AnyKey, AnyModifier, root);
+ XFreePixmap(dpy, dc.drawable);
+ XFreeGC(dpy, dc.gc);
+ XDestroyWindow(dpy, barwin);
+ XFreeCursor(dpy, cursor[CurNormal]);
+ XFreeCursor(dpy, cursor[CurResize]);
+ XFreeCursor(dpy, cursor[CurMove]);
+ XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
+ XSync(dpy, False);
+ free(seltags);
+}
+
+static long
+getstate(Window w) {
+ int format, status;
+ long result = -1;
+ unsigned char *p = NULL;
+ unsigned long 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;
+}
+
+static void
+scan(void) {
+ unsigned int 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);
+}
+
+static void
+setup(void) {
+ int i, j;
+ unsigned int mask;
+ Window w;
+ XModifierKeymap *modmap;
+ XSetWindowAttributes wa;
+
+ /* 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);
+ XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
+ PropModeReplace, (unsigned char *) netatom, NetLast);
+ /* init cursors */
+ cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
+ cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
+ cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
+ /* 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);
+ /* select for events */
+ wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
+ | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
+ wa.cursor = cursor[CurNormal];
+ XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
+ XSelectInput(dpy, root, wa.event_mask);
+ grabkeys();
+ compileregs();
+ for(ntags = 0; tags[ntags]; ntags++);
+ seltags = emallocz(sizeof(Bool) * ntags);
+ seltags[0] = True;
+ /* geometry */
+ sx = sy = 0;
+ sw = DisplayWidth(dpy, screen);
+ sh = DisplayHeight(dpy, screen);
+ initstyle();
+ initlayouts();
+ initbar();
+ /* multihead support */
+ selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
+}
+
+/*
+ * Startup Error handler to check if another window manager
+ * is already running.
+ */
+static int
+xerrorstart(Display *dsply, XErrorEvent *ee) {
+ otherwm = True;
+ return -1;
+}
+
+static Bool
+gettextprop(Window w, Atom atom, char *text, unsigned int 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;
+}
+
+static void
+quit(const char *arg) {
+ readin = running = False;
+}
+
+/* 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.
+ */
+static 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_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 */
+}
+
+static void
+arrange(void) {
+ Client *c;
+
+ for(c = clients; c; c = c->next)
+ if(isvisible(c))
+ unban(c);
+ else
+ ban(c);
+ layouts[ltidx].arrange();
+ focus(NULL);
+ restack();
+}
+
+static void
+attach(Client *c) {
+ if(clients)
+ clients->prev = c;
+ c->next = clients;
+ clients = c;
+}
+
+static void
+detach(Client *c) {
+ if(c->prev)
+ c->prev->next = c->next;
+ if(c->next)
+ c->next->prev = c->prev;
+ if(c == clients)
+ clients = c->next;
+ c->next = c->prev = NULL;
+}
+
+static void
+focus(Client *c) {
+ if((!c && selscreen) || (c && !isvisible(c)))
+ for(c = stack; c && !isvisible(c); 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);
+ }
+ sel = c;
+ drawbar();
+ if(!selscreen)
+ return;
+ if(c) {
+ XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
+ XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
+ }
+ else
+ XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
+}
+
+static Bool
+isarrange(void (*func)())
+{
+ return func == layouts[ltidx].arrange;
+}
+
+static Client *
+nexttiled(Client *c) {
+ for(; c && (c->isfloating || !isvisible(c)); c = c->next);
+ return c;
+}
+
+static void
+setmwfact(const char *arg) {
+ double delta;
+
+ if(!isarrange(tile))
+ return;
+ /* arg handling, manipulate mwfact */
+ if(arg == NULL)
+ mwfact = MWFACT;
+ else if(1 == sscanf(arg, "%lf", &delta)) {
+ if(arg[0] != '+' && arg[0] != '-')
+ mwfact = delta;
+ else
+ mwfact += delta;
+ if(mwfact < 0.1)
+ mwfact = 0.1;
+ else if(mwfact > 0.9)
+ mwfact = 0.9;
+ }
+ arrange();
+}
+
+static void
+tile(void) {
+ unsigned int i, n, nx, ny, nw, nh, mw, th;
+ Client *c;
+
+ for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
+ n++;
+
+ /* window geoms */
+ mw = (n == 1) ? waw : mwfact * waw;
+ th = (n > 1) ? wah / (n - 1) : 0;
+ if(n > 1 && th < bh)
+ th = wah;
+
+ nx = wax;
+ ny = way;
+ for(i = 0, c = nexttiled(clients); c; c = nexttiled(c->next), i++) {
+ c->ismax = False;
+ if(i == 0) { /* master */
+ nw = mw - 2 * c->border;
+ nh = wah - 2 * c->border;
+ }
+ else { /* tile window */
+ if(i == 1) {
+ ny = way;
+ nx += mw;
+ }
+ nw = waw - mw - 2 * c->border;
+ if(i + 1 == n) /* remainder */
+ nh = (way + wah) - ny - 2 * c->border;
+ else
+ nh = th - 2 * c->border;
+ }
+ resize(c, nx, ny, nw, nh, RESIZEHINTS);
+ if(n > 1 && th != wah)
+ ny += nh + 2 * c->border;
+ }
+}
+
+static void
+zoom(const char *arg) {
+ Client *c;
+
+ if(!sel || !isarrange(tile) || sel->isfloating)
+ return;
+ if((c = sel) == nexttiled(clients))
+ if(!(c = nexttiled(c->next)))
+ return;
+ detach(c);
+ attach(c);
+ focus(c);
+ arrange();
+}
+
+int
+main(int argc, char *argv[]) {
+ char *p;
+ int r, xfd;
+ fd_set rd;
+ XEvent ev;
+
+ if(argc == 2 && !strcmp("-v", argv[1]))
+ eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
+ else if(argc != 1)
+ eprint("usage: dwm [-v]\n");
+ setlocale(LC_CTYPE, "");
+ if(!(dpy = XOpenDisplay(0)))
+ eprint("dwm: cannot open display\n");
+ xfd = ConnectionNumber(dpy);
+ screen = DefaultScreen(dpy);
+ root = RootWindow(dpy, screen);
+ otherwm = False;
+ XSetErrorHandler(xerrorstart);
+ /* this causes an error if some other window manager is running */
+ XSelectInput(dpy, root, SubstructureRedirectMask);
+ XSync(dpy, False);
+ if(otherwm)
+ eprint("dwm: another window manager is already running\n");
+
+ XSync(dpy, False);
+ XSetErrorHandler(NULL);
+ xerrorxlib = XSetErrorHandler(xerror);
+ XSync(dpy, False);
+ setup();
+ drawbar();
+ scan();
+
+ /* main event loop, also reads status text from stdin */
+ XSync(dpy, False);
+ readin = True;
+ 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, stext, sizeof stext - 1)) {
+ case -1:
+ strncpy(stext, strerror(errno), sizeof stext - 1);
+ stext[sizeof stext - 1] = '\0';
+ readin = False;
+ break;
+ case 0:
+ strncpy(stext, "EOF", 4);
+ readin = False;
+ break;
+ default:
+ for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
+ for(; p >= stext && *p != '\n'; --p);
+ if(p > stext)
+ strncpy(stext, p + 1, sizeof stext);
+ }
+ drawbar();
+ }
+ while(XPending(dpy)) {
+ XNextEvent(dpy, &ev);
+ if(handler[ev.type])
+ (handler[ev.type])(&ev); /* call handler */
+ }
+ }
+ cleanup();
+ XCloseDisplay(dpy);
+ return 0;
+}
Got questions, comments, patches, etc.? Contact Jason Woofenden