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dwm.c
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dwm.c
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/* 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.
*
* 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 linked client
* list on each monitor, the focus history is remembered through a stack list
* on each monitor. 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 <errno.h>
#include <locale.h>
#include <stdarg.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.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>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif /* XINERAMA */
/* macros */
#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask) & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
#define INTERSECT(x,y,w,h,m) (MAX(0, MIN((x)+(w),(m)->wx+(m)->ww) - MAX((x),(m)->wx)) \
* MAX(0, MIN((y)+(h),(m)->wy+(m)->wh) - MAX((y),(m)->wy)))
#define ISVISIBLE(C) ((C->tags & C->mon->tagset[C->mon->seltags]))
#define LENGTH(X) (sizeof X / sizeof X[0])
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#define MIN(A, B) ((A) < (B) ? (A) : (B))
#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
#define WIDTH(X) ((X)->w + 2 * (X)->bw)
#define HEIGHT(X) ((X)->h + 2 * (X)->bw)
#define TAGMASK ((1 << 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, NetWMState,
NetWMFullscreen, NetActiveWindow, NetWMWindowType,
NetWMWindowTypeDialog, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMLast }; /* default atoms */
enum { ClkTagBar, ClkLtSymbol, ClkStatusText, ClkWinTitle,
ClkClientWin, ClkRootWin, ClkLast }; /* clicks */
typedef union {
int i;
unsigned int ui;
float f;
const void *v;
} Arg;
typedef struct {
unsigned int click;
unsigned int mask;
unsigned int button;
void (*func)(const Arg *arg);
const Arg arg;
} Button;
typedef struct Monitor Monitor;
typedef struct Client Client;
struct Client {
char name[256];
float mina, maxa;
int x, y, w, h;
int oldx, oldy, oldw, oldh;
int basew, baseh, incw, inch, maxw, maxh, minw, minh;
int bw, oldbw;
unsigned int tags;
Bool isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
Client *next;
Client *snext;
Monitor *mon;
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 int mod;
KeySym keysym;
void (*func)(const Arg *);
const Arg arg;
} Key;
typedef struct {
const char *symbol;
void (*arrange)(Monitor *);
} Layout;
struct Monitor {
char ltsymbol[16];
float mfact;
int nmaster;
int num;
int by; /* bar geometry */
int mx, my, mw, mh; /* screen size */
int wx, wy, ww, wh; /* window area */
unsigned int seltags;
unsigned int sellt;
unsigned int tagset[2];
Bool showbar;
Bool topbar;
Client *clients;
Client *sel;
Client *stack;
Monitor *next;
Window barwin;
const Layout *lt[2];
};
typedef struct {
const char *class;
const char *instance;
const char *title;
unsigned int tags;
Bool isfloating;
int monitor;
} Rule;
/* function declarations */
static void applyrules(Client *c);
static Bool applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact);
static void arrange(Monitor *m);
static void arrangemon(Monitor *m);
static void attach(Client *c);
static void attachstack(Client *c);
static void buttonpress(XEvent *e);
static void checkotherwm(void);
static void cleanup(void);
static void cleanupmon(Monitor *mon);
static void clearurgent(Client *c);
static void clientmessage(XEvent *e);
static void configure(Client *c);
static void configurenotify(XEvent *e);
static void configurerequest(XEvent *e);
static Monitor *createmon(void);
static void destroynotify(XEvent *e);
static void detach(Client *c);
static void detachstack(Client *c);
static void die(const char *errstr, ...);
static Monitor *dirtomon(int dir);
static void drawbar(Monitor *m);
static void drawbars(void);
static void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
static void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
static void enternotify(XEvent *e);
static void expose(XEvent *e);
static void focus(Client *c);
static void focusin(XEvent *e);
static void focusmon(const Arg *arg);
static void focusstack(const Arg *arg);
static unsigned long getcolor(const char *colstr);
static Bool getrootptr(int *x, int *y);
static long getstate(Window w);
static Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
static void grabbuttons(Client *c, Bool focused);
static void grabkeys(void);
static void incnmaster(const Arg *arg);
static void initfont(const char *fontstr);
static void keypress(XEvent *e);
static void killclient(const Arg *arg);
static void manage(Window w, XWindowAttributes *wa);
static void mappingnotify(XEvent *e);
static void maprequest(XEvent *e);
static void monocle(Monitor *m);
static void motionnotify(XEvent *e);
static void movemouse(const Arg *arg);
static Client *nexttiled(Client *c);
static void pop(Client *);
static void propertynotify(XEvent *e);
static void quit(const Arg *arg);
static Monitor *recttomon(int x, int y, int w, int h);
static void resize(Client *c, int x, int y, int w, int h, Bool interact);
static void resizeclient(Client *c, int x, int y, int w, int h);
static void resizemouse(const Arg *arg);
static void restack(Monitor *m);
static void run(void);
static void scan(void);
static Bool sendevent(Client *c, Atom proto);
static void sendmon(Client *c, Monitor *m);
static void setclientstate(Client *c, long state);
static void setfocus(Client *c);
static void setfullscreen(Client *c, Bool fullscreen);
static void setlayout(const Arg *arg);
static void setmfact(const Arg *arg);
static void setup(void);
static void showhide(Client *c);
static void sigchld(int unused);
static void spawn(const Arg *arg);
static void tag(const Arg *arg);
static void tagmon(const Arg *arg);
static int textnw(const char *text, unsigned int len);
static void tile(Monitor *);
static void togglebar(const Arg *arg);
static void togglefloating(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
static void unfocus(Client *c, Bool setfocus);
static void unmanage(Client *c, Bool destroyed);
static void unmapnotify(XEvent *e);
static Bool updategeom(void);
static void updatebarpos(Monitor *m);
static void updatebars(void);
static void updatenumlockmask(void);
static void updatesizehints(Client *c);
static void updatestatus(void);
static void updatewindowtype(Client *c);
static void updatetitle(Client *c);
static void updatewmhints(Client *c);
static void view(const Arg *arg);
static Client *wintoclient(Window w);
static Monitor *wintomon(Window w);
static int xerror(Display *dpy, XErrorEvent *ee);
static int xerrordummy(Display *dpy, XErrorEvent *ee);
static int xerrorstart(Display *dpy, XErrorEvent *ee);
static void zoom(const Arg *arg);
/* variables */
static const char broken[] = "broken";
static char stext[256];
static int screen;
static int sw, sh; /* X display screen geometry width, height */
static int bh, blw = 0; /* bar geometry */
static int (*xerrorxlib)(Display *, XErrorEvent *);
static unsigned int numlockmask = 0;
static void (*handler[LASTEvent]) (XEvent *) = {
[ButtonPress] = buttonpress,
[ClientMessage] = clientmessage,
[ConfigureRequest] = configurerequest,
[ConfigureNotify] = configurenotify,
[DestroyNotify] = destroynotify,
[EnterNotify] = enternotify,
[Expose] = expose,
[FocusIn] = focusin,
[KeyPress] = keypress,
[MappingNotify] = mappingnotify,
[MapRequest] = maprequest,
[MotionNotify] = motionnotify,
[PropertyNotify] = propertynotify,
[UnmapNotify] = unmapnotify
};
static Atom wmatom[WMLast], netatom[NetLast];
static Bool running = True;
static Cursor cursor[CurLast];
static Display *dpy;
static DC dc;
static Monitor *mons = NULL, *selmon = NULL;
static Window root;
/* configuration, allows nested code to access above variables */
#include "config.h"
/* compile-time check if all tags fit into an unsigned int bit array. */
struct NumTags { char limitexceeded[LENGTH(tags) > 31 ? -1 : 1]; };
/* function implementations */
void
applyrules(Client *c) {
const char *class, *instance;
unsigned int i;
const Rule *r;
Monitor *m;
XClassHint ch = { NULL, NULL };
/* rule matching */
c->isfloating = c->tags = 0;
XGetClassHint(dpy, c->win, &ch);
class = ch.res_class ? ch.res_class : broken;
instance = ch.res_name ? ch.res_name : broken;
for(i = 0; i < LENGTH(rules); i++) {
r = &rules[i];
if((!r->title || strstr(c->name, r->title))
&& (!r->class || strstr(class, r->class))
&& (!r->instance || strstr(instance, r->instance)))
{
c->isfloating = r->isfloating;
c->tags |= r->tags;
for(m = mons; m && m->num != r->monitor; m = m->next);
if(m)
c->mon = m;
}
}
if(ch.res_class)
XFree(ch.res_class);
if(ch.res_name)
XFree(ch.res_name);
c->tags = c->tags & TAGMASK ? c->tags & TAGMASK : c->mon->tagset[c->mon->seltags];
}
Bool
applysizehints(Client *c, int *x, int *y, int *w, int *h, Bool interact) {
Bool baseismin;
Monitor *m = c->mon;
/* set minimum possible */
*w = MAX(1, *w);
*h = MAX(1, *h);
if(interact) {
if(*x > sw)
*x = sw - WIDTH(c);
if(*y > sh)
*y = sh - HEIGHT(c);
if(*x + *w + 2 * c->bw < 0)
*x = 0;
if(*y + *h + 2 * c->bw < 0)
*y = 0;
}
else {
if(*x >= m->wx + m->ww)
*x = m->wx + m->ww - WIDTH(c);
if(*y >= m->wy + m->wh)
*y = m->wy + m->wh - HEIGHT(c);
if(*x + *w + 2 * c->bw <= m->wx)
*x = m->wx;
if(*y + *h + 2 * c->bw <= m->wy)
*y = m->wy;
}
if(*h < bh)
*h = bh;
if(*w < bh)
*w = bh;
if(resizehints || c->isfloating || !c->mon->lt[c->mon->sellt]->arrange) {
/* see last two sentences in ICCCM 4.1.2.3 */
baseismin = c->basew == c->minw && c->baseh == c->minh;
if(!baseismin) { /* 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 + 0.5;
else if(c->mina < (float)*h / *w)
*h = *w * c->mina + 0.5;
}
if(baseismin) { /* increment calculation requires this */
*w -= c->basew;
*h -= c->baseh;
}
/* adjust for increment value */
if(c->incw)
*w -= *w % c->incw;
if(c->inch)
*h -= *h % c->inch;
/* restore base dimensions */
*w = MAX(*w + c->basew, c->minw);
*h = MAX(*h + c->baseh, c->minh);
if(c->maxw)
*w = MIN(*w, c->maxw);
if(c->maxh)
*h = MIN(*h, c->maxh);
}
return *x != c->x || *y != c->y || *w != c->w || *h != c->h;
}
void
arrange(Monitor *m) {
if(m)
showhide(m->stack);
else for(m = mons; m; m = m->next)
showhide(m->stack);
if(m)
arrangemon(m);
else for(m = mons; m; m = m->next)
arrangemon(m);
}
void
arrangemon(Monitor *m) {
strncpy(m->ltsymbol, m->lt[m->sellt]->symbol, sizeof m->ltsymbol);
if(m->lt[m->sellt]->arrange)
m->lt[m->sellt]->arrange(m);
restack(m);
}
void
attach(Client *c) {
c->next = c->mon->clients;
c->mon->clients = c;
}
void
attachstack(Client *c) {
c->snext = c->mon->stack;
c->mon->stack = c;
}
void
buttonpress(XEvent *e) {
unsigned int i, x, click;
Arg arg = {0};
Client *c;
Monitor *m;
XButtonPressedEvent *ev = &e->xbutton;
click = ClkRootWin;
/* focus monitor if necessary */
if((m = wintomon(ev->window)) && m != selmon) {
unfocus(selmon->sel, True);
selmon = m;
focus(NULL);
}
if(ev->window == selmon->barwin) {
i = x = 0;
do
x += TEXTW(tags[i]);
while(ev->x >= x && ++i < LENGTH(tags));
if(i < LENGTH(tags)) {
click = ClkTagBar;
arg.ui = 1 << i;
}
else if(ev->x < x + blw)
click = ClkLtSymbol;
else if(ev->x > selmon->ww - TEXTW(stext))
click = ClkStatusText;
else
click = ClkWinTitle;
}
else if((c = wintoclient(ev->window))) {
focus(c);
click = ClkClientWin;
}
for(i = 0; i < LENGTH(buttons); i++)
if(click == buttons[i].click && buttons[i].func && buttons[i].button == ev->button
&& CLEANMASK(buttons[i].mask) == CLEANMASK(ev->state))
buttons[i].func(click == ClkTagBar && buttons[i].arg.i == 0 ? &arg : &buttons[i].arg);
}
void
checkotherwm(void) {
xerrorxlib = XSetErrorHandler(xerrorstart);
/* this causes an error if some other window manager is running */
XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
XSync(dpy, False);
XSetErrorHandler(xerror);
XSync(dpy, False);
}
void
cleanup(void) {
Arg a = {.ui = ~0};
Layout foo = { "", NULL };
Monitor *m;
view(&a);
selmon->lt[selmon->sellt] = &foo;
for(m = mons; m; m = m->next)
while(m->stack)
unmanage(m->stack, False);
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);
XFreeCursor(dpy, cursor[CurNormal]);
XFreeCursor(dpy, cursor[CurResize]);
XFreeCursor(dpy, cursor[CurMove]);
while(mons)
cleanupmon(mons);
XSync(dpy, False);
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}
void
cleanupmon(Monitor *mon) {
Monitor *m;
if(mon == mons)
mons = mons->next;
else {
for(m = mons; m && m->next != mon; m = m->next);
m->next = mon->next;
}
XUnmapWindow(dpy, mon->barwin);
XDestroyWindow(dpy, mon->barwin);
free(mon);
}
void
clearurgent(Client *c) {
XWMHints *wmh;
c->isurgent = False;
if(!(wmh = XGetWMHints(dpy, c->win)))
return;
wmh->flags &= ~XUrgencyHint;
XSetWMHints(dpy, c->win, wmh);
XFree(wmh);
}
void
clientmessage(XEvent *e) {
XClientMessageEvent *cme = &e->xclient;
Client *c = wintoclient(cme->window);
if(!c)
return;
if(cme->message_type == netatom[NetWMState]) {
if(cme->data.l[1] == netatom[NetWMFullscreen] || cme->data.l[2] == netatom[NetWMFullscreen])
setfullscreen(c, (cme->data.l[0] == 1 /* _NET_WM_STATE_ADD */
|| (cme->data.l[0] == 2 /* _NET_WM_STATE_TOGGLE */ && !c->isfullscreen)));
}
else if(cme->message_type == netatom[NetActiveWindow]) {
if(!ISVISIBLE(c)) {
c->mon->seltags ^= 1;
c->mon->tagset[c->mon->seltags] = c->tags;
}
pop(c);
}
}
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->bw;
ce.above = None;
ce.override_redirect = False;
XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
}
void
configurenotify(XEvent *e) {
Monitor *m;
XConfigureEvent *ev = &e->xconfigure;
Bool dirty;
if(ev->window == root) {
dirty = (sw != ev->width);
sw = ev->width;
sh = ev->height;
if(updategeom() || dirty) {
if(dc.drawable != 0)
XFreePixmap(dpy, dc.drawable);
dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
updatebars();
for(m = mons; m; m = m->next)
XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
focus(NULL);
arrange(NULL);
}
}
}
void
configurerequest(XEvent *e) {
Client *c;
Monitor *m;
XConfigureRequestEvent *ev = &e->xconfigurerequest;
XWindowChanges wc;
if((c = wintoclient(ev->window))) {
if(ev->value_mask & CWBorderWidth)
c->bw = ev->border_width;
else if(c->isfloating || !selmon->lt[selmon->sellt]->arrange) {
m = c->mon;
if(ev->value_mask & CWX) {
c->oldx = c->x;
c->x = m->mx + ev->x;
}
if(ev->value_mask & CWY) {
c->oldy = c->y;
c->y = m->my + ev->y;
}
if(ev->value_mask & CWWidth) {
c->oldw = c->w;
c->w = ev->width;
}
if(ev->value_mask & CWHeight) {
c->oldh = c->h;
c->h = ev->height;
}
if((c->x + c->w) > m->mx + m->mw && c->isfloating)
c->x = m->mx + (m->mw / 2 - WIDTH(c) / 2); /* center in x direction */
if((c->y + c->h) > m->my + m->mh && c->isfloating)
c->y = m->my + (m->mh / 2 - HEIGHT(c) / 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);
}
Monitor *
createmon(void) {
Monitor *m;
if(!(m = (Monitor *)calloc(1, sizeof(Monitor))))
die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
m->tagset[0] = m->tagset[1] = 1;
m->mfact = mfact;
m->nmaster = nmaster;
m->showbar = showbar;
m->topbar = topbar;
m->lt[0] = &layouts[0];
m->lt[1] = &layouts[1 % LENGTH(layouts)];
strncpy(m->ltsymbol, layouts[0].symbol, sizeof m->ltsymbol);
return m;
}
void
destroynotify(XEvent *e) {
Client *c;
XDestroyWindowEvent *ev = &e->xdestroywindow;
if((c = wintoclient(ev->window)))
unmanage(c, True);
}
void
detach(Client *c) {
Client **tc;
for(tc = &c->mon->clients; *tc && *tc != c; tc = &(*tc)->next);
*tc = c->next;
}
void
detachstack(Client *c) {
Client **tc, *t;
for(tc = &c->mon->stack; *tc && *tc != c; tc = &(*tc)->snext);
*tc = c->snext;
if(c == c->mon->sel) {
for(t = c->mon->stack; t && !ISVISIBLE(t); t = t->snext);
c->mon->sel = t;
}
}
void
die(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
Monitor *
dirtomon(int dir) {
Monitor *m = NULL;
if(dir > 0) {
if(!(m = selmon->next))
m = mons;
}
else if(selmon == mons)
for(m = mons; m->next; m = m->next);
else
for(m = mons; m->next != selmon; m = m->next);
return m;
}
void
drawbar(Monitor *m) {
int x;
unsigned int i, occ = 0, urg = 0;
unsigned long *col;
Client *c;
for(c = m->clients; c; c = c->next) {
occ |= c->tags;
if(c->isurgent)
urg |= c->tags;
}
dc.x = 0;
for(i = 0; i < LENGTH(tags); i++) {
dc.w = TEXTW(tags[i]);
col = m->tagset[m->seltags] & 1 << i ? dc.sel : dc.norm;
drawtext(tags[i], col, urg & 1 << i);
drawsquare(m == selmon && selmon->sel && selmon->sel->tags & 1 << i,
occ & 1 << i, urg & 1 << i, col);
dc.x += dc.w;
}
dc.w = blw = TEXTW(m->ltsymbol);
drawtext(m->ltsymbol, dc.norm, False);
dc.x += dc.w;
x = dc.x;
if(m == selmon) { /* status is only drawn on selected monitor */
dc.w = TEXTW(stext);
dc.x = m->ww - dc.w;
if(dc.x < x) {
dc.x = x;
dc.w = m->ww - x;
}
drawtext(stext, dc.norm, False);
}
else
dc.x = m->ww;
if((dc.w = dc.x - x) > bh) {
dc.x = x;
if(m->sel) {
col = m == selmon ? dc.sel : dc.norm;
drawtext(m->sel->name, col, False);
drawsquare(m->sel->isfixed, m->sel->isfloating, False, col);
}
else
drawtext(NULL, dc.norm, False);
}
XCopyArea(dpy, dc.drawable, m->barwin, dc.gc, 0, 0, m->ww, bh, 0, 0);
XSync(dpy, False);
}
void
drawbars(void) {
Monitor *m;
for(m = mons; m; m = m->next)
drawbar(m);
}
void
drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
int x;
XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
x = (dc.font.ascent + dc.font.descent + 2) / 4;
if(filled)
XFillRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x+1, x+1);
else if(empty)
XDrawRectangle(dpy, dc.drawable, dc.gc, dc.x+1, dc.y+1, x, x);
}
void
drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
char buf[256];
int i, x, y, h, len, olen;
XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
XFillRectangle(dpy, dc.drawable, dc.gc, dc.x, dc.y, dc.w, dc.h);
if(!text)
return;
olen = strlen(text);
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 = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
if(!len)
return;
memcpy(buf, text, len);
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;
Monitor *m;
XCrossingEvent *ev = &e->xcrossing;
if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
return;
c = wintoclient(ev->window);
m = c ? c->mon : wintomon(ev->window);
if(m != selmon) {
unfocus(selmon->sel, True);
selmon = m;
}
else if(!c || c == selmon->sel)
return;
focus(c);
}
void
expose(XEvent *e) {
Monitor *m;
XExposeEvent *ev = &e->xexpose;
if(ev->count == 0 && (m = wintomon(ev->window)))
drawbar(m);
}
void
focus(Client *c) {
if(!c || !ISVISIBLE(c))
for(c = selmon->stack; c && !ISVISIBLE(c); c = c->snext);
/* was if(selmon->sel) */
if(selmon->sel && selmon->sel != c)
unfocus(selmon->sel, False);
if(c) {
if(c->mon != selmon)
selmon = c->mon;
if(c->isurgent)
clearurgent(c);
detachstack(c);
attachstack(c);
grabbuttons(c, True);
XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
setfocus(c);
}
else
XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
selmon->sel = c;
drawbars();
}
void
focusin(XEvent *e) { /* there are some broken focus acquiring clients */
XFocusChangeEvent *ev = &e->xfocus;
if(selmon->sel && ev->window != selmon->sel->win)
setfocus(selmon->sel);
}
void
focusmon(const Arg *arg) {
Monitor *m;
if(!mons->next)
return;
if((m = dirtomon(arg->i)) == selmon)
return;
unfocus(selmon->sel, True);
selmon = m;
focus(NULL);
}
void
focusstack(const Arg *arg) {
Client *c = NULL, *i;
if(!selmon->sel)
return;
if(arg->i > 0) {
for(c = selmon->sel->next; c && !ISVISIBLE(c); c = c->next);
if(!c)
for(c = selmon->clients; c && !ISVISIBLE(c); c = c->next);
}
else {
for(i = selmon->clients; i != selmon->sel; i = i->next)
if(ISVISIBLE(i))
c = i;
if(!c)
for(; i; i = i->next)
if(ISVISIBLE(i))
c = i;
}
if(c) {
focus(c);
restack(selmon);
}
}
Atom
getatomprop(Client *c, Atom prop) {
int di;
unsigned long dl;
unsigned char *p = NULL;
Atom da, atom = None;
if(XGetWindowProperty(dpy, c->win, prop, 0L, sizeof atom, False, XA_ATOM,
&da, &di, &dl, &dl, &p) == Success && p) {
atom = *(Atom *)p;
XFree(p);
}
return atom;
}
unsigned long
getcolor(const char *colstr) {
Colormap cmap = DefaultColormap(dpy, screen);
XColor color;
if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
die("error, cannot allocate color '%s'\n", colstr);
return color.pixel;
}
Bool
getrootptr(int *x, int *y) {
int di;
unsigned int dui;
Window dummy;
return XQueryPointer(dpy, root, &dummy, &dummy, x, y, &di, &di, &dui);
}
long
getstate(Window w) {
int format;
long result = -1;
unsigned char *p = NULL;
unsigned long n, extra;
Atom real;
if(XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
&real, &format, &n, &extra, (unsigned char **)&p) != Success)
return -1;
if(n != 0)
result = *p;
XFree(p);
return result;
}
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;
}
void
grabbuttons(Client *c, Bool focused) {
updatenumlockmask();
{
unsigned int i, j;
unsigned int modifiers[] = { 0, LockMask, numlockmask, numlockmask|LockMask };
XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
if(focused) {
for(i = 0; i < LENGTH(buttons); i++)
if(buttons[i].click == ClkClientWin)
for(j = 0; j < LENGTH(modifiers); j++)