event.c

   1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <stdlib.h>
   6 #include <X11/keysym.h>
   7 #include <X11/Xatom.h>
   8
   9 /* static */
  10
  11 typedef struct {
  12         unsigned long mod;
  13         KeySym keysym;
  14         void (*func)(Arg *arg);
  15         Arg arg;
  16 } Key;
  17
  18 KEYS
  19
  20 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  21 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  22
  23 static void
  24 movemouse(Client *c) {
  25         int x1, y1, ocx, ocy, di;
  26         unsigned int dui;
  27         Window dummy;
  28         XEvent ev;
  29
  30         ocx = c->x;
  31         ocy = c->y;
  32         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  33                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  34                 return;
  35         c->ismax = False;
  36         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  37         for(;;) {
  38                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  39                 switch (ev.type) {
  40                 case ButtonRelease:
  41                         resize(c, True);
  42                         XUngrabPointer(dpy, CurrentTime);
  43                         return;
  44                 case ConfigureRequest:
  45                 case Expose:
  46                 case MapRequest:
  47                         handler[ev.type](&ev);
  48                         break;
  49                 case MotionNotify:
  50                         XSync(dpy, False);
  51                         c->x = ocx + (ev.xmotion.x - x1);
  52                         c->y = ocy + (ev.xmotion.y - y1);
  53                         if(abs(wax + c->x) < SNAP)
  54                                 c->x = wax;
  55                         else if(abs((wax + waw) - (c->x + c->w + 2 * c->border)) < SNAP)
  56                                 c->x = wax + waw - c->w - 2 * c->border;
  57                         if(abs(way - c->y) < SNAP)
  58                                 c->y = way;
  59                         else if(abs((way + wah) - (c->y + c->h + 2 * c->border)) < SNAP)
  60                                 c->y = way + wah - c->h - 2 * c->border;
  61                         resize(c, False);
  62                         break;
  63                 }
  64         }
  65 }
  66
  67 static void
  68 resizemouse(Client *c) {
  69         int ocx, ocy;
  70         int nw, nh;
  71         XEvent ev;
  72
  73         ocx = c->x;
  74         ocy = c->y;
  75         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  76                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  77                 return;
  78         c->ismax = False;
  79         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  80         for(;;) {
  81                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  82                 switch(ev.type) {
  83                 case ButtonRelease:
  84                         resize(c, True);
  85                         XUngrabPointer(dpy, CurrentTime);
  86                         return;
  87                 case ConfigureRequest:
  88                 case Expose:
  89                 case MapRequest:
  90                         handler[ev.type](&ev);
  91                         break;
  92                 case MotionNotify:
  93                         XSync(dpy, False);
  94                         nw = ev.xmotion.x - ocx - 2 * c->border + 1;
  95                         c->w = nw > 0 ? nw : 1;
  96                         nh = ev.xmotion.y - ocy - 2 * c->border + 1;
  97                         c->h = nh > 0 ? nh : 1;
  98                         resize(c, True);
  99                         break;
 100                 }
 101         }
 102 }
 103
 104 static void
 105 buttonpress(XEvent *e) {
 106         int x;
 107         Arg a;
 108         Client *c;
 109         XButtonPressedEvent *ev = &e->xbutton;
 110
 111         if(barwin == ev->window) {
 112                 x = 0;
 113                 for(a.i = 0; a.i < ntags; a.i++) {
 114                         x += textw(tags[a.i]);
 115                         if(ev->x < x) {
 116                                 if(ev->button == Button1) {
 117                                         if(ev->state & MODKEY)
 118                                                 tag(&a);
 119                                         else
 120                                                 view(&a);
 121                                 }
 122                                 else if(ev->button == Button3) {
 123                                         if(ev->state & MODKEY)
 124                                                 toggletag(&a);
 125                                         else
 126                                                 toggleview(&a);
 127                                 }
 128                                 return;
 129                         }
 130                 }
 131                 if(ev->x < x + bmw)
 132                         switch(ev->button) {
 133                         case Button1:
 134                                 togglemode(NULL);
 135                                 break;
 136                         case Button4:
 137                                 a.i = 1;
 138                                 incnmaster(&a);
 139                                 break;
 140                         case Button5:
 141                                 a.i = -1;
 142                                 incnmaster(&a);
 143                                 break;
 144                         }
 145         }
 146         else if((c = getclient(ev->window))) {
 147                 focus(c);
 148                 if(CLEANMASK(ev->state) != MODKEY)
 149                         return;
 150                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 151                         restack();
 152                         movemouse(c);
 153                 }
 154                 else if(ev->button == Button2)
 155                         zoom(NULL);
 156                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat) &&
 157                                 !c->isfixed) {
 158                         restack();
 159                         resizemouse(c);
 160                 }
 161         }
 162 }
 163
 164 static void
 165 configurerequest(XEvent *e) {
 166         unsigned long newmask;
 167         Client *c;
 168         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 169         XWindowChanges wc;
 170
 171         if((c = getclient(ev->window))) {
 172                 c->ismax = False;
 173                 if(ev->value_mask & CWX)
 174                         c->x = ev->x;
 175                 if(ev->value_mask & CWY)
 176                         c->y = ev->y;
 177                 if(ev->value_mask & CWWidth)
 178                         c->w = ev->width;
 179                 if(ev->value_mask & CWHeight)
 180                         c->h = ev->height;
 181                 if(ev->value_mask & CWBorderWidth)
 182                         c->border = ev->border_width;
 183                 wc.x = c->x;
 184                 wc.y = c->y;
 185                 wc.width = c->w;
 186                 wc.height = c->h;
 187                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 188                 if(newmask)
 189                         XConfigureWindow(dpy, c->win, newmask, &wc);
 190                 else
 191                         configure(c);
 192                 XSync(dpy, False);
 193                 if(c->isfloat) {
 194                         resize(c, False);
 195                         if(!isvisible(c))
 196                                 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 197                 }
 198                 else
 199                         arrange();
 200         }
 201         else {
 202                 wc.x = ev->x;
 203                 wc.y = ev->y;
 204                 wc.width = ev->width;
 205                 wc.height = ev->height;
 206                 wc.border_width = ev->border_width;
 207                 wc.sibling = ev->above;
 208                 wc.stack_mode = ev->detail;
 209                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 210                 XSync(dpy, False);
 211         }
 212 }
 213
 214 static void
 215 destroynotify(XEvent *e) {
 216         Client *c;
 217         XDestroyWindowEvent *ev = &e->xdestroywindow;
 218
 219         if((c = getclient(ev->window)))
 220                 unmanage(c);
 221 }
 222
 223 static void
 224 enternotify(XEvent *e) {
 225         Client *c;
 226         XCrossingEvent *ev = &e->xcrossing;
 227
 228         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 229                 return;
 230         if((c = getclient(ev->window)) && isvisible(c))
 231                 focus(c);
 232         else if(ev->window == root) {
 233                 issel = True;
 234                 for(c = stack; c && !isvisible(c); c = c->snext);
 235                 focus(c);
 236         }
 237 }
 238
 239 static void
 240 expose(XEvent *e) {
 241         XExposeEvent *ev = &e->xexpose;
 242
 243         if(ev->count == 0) {
 244                 if(barwin == ev->window)
 245                         drawstatus();
 246         }
 247 }
 248
 249 static void
 250 keypress(XEvent *e) {
 251         static unsigned int len = sizeof key / sizeof key[0];
 252         unsigned int i;
 253         KeySym keysym;
 254         XKeyEvent *ev = &e->xkey;
 255
 256         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 257         for(i = 0; i < len; i++) {
 258                 if(keysym == key[i].keysym
 259                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 260                 {
 261                         if(key[i].func)
 262                                 key[i].func(&key[i].arg);
 263                 }
 264         }
 265 }
 266
 267 static void
 268 leavenotify(XEvent *e) {
 269         XCrossingEvent *ev = &e->xcrossing;
 270
 271         if((ev->window == root) && !ev->same_screen) {
 272                 focus(NULL);
 273                 issel = False;
 274         }
 275 }
 276
 277 static void
 278 mappingnotify(XEvent *e) {
 279         XMappingEvent *ev = &e->xmapping;
 280
 281         XRefreshKeyboardMapping(ev);
 282         if(ev->request == MappingKeyboard)
 283                 grabkeys();
 284 }
 285
 286 static void
 287 maprequest(XEvent *e) {
 288         static XWindowAttributes wa;
 289         XMapRequestEvent *ev = &e->xmaprequest;
 290
 291         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 292                 return;
 293         if(wa.override_redirect) {
 294                 XSelectInput(dpy, ev->window,
 295                                 (StructureNotifyMask | PropertyChangeMask));
 296                 return;
 297         }
 298         if(!getclient(ev->window))
 299                 manage(ev->window, &wa);
 300 }
 301
 302 static void
 303 propertynotify(XEvent *e) {
 304         Client *c;
 305         Window trans;
 306         XPropertyEvent *ev = &e->xproperty;
 307
 308         if(ev->state == PropertyDelete)
 309                 return; /* ignore */
 310         if((c = getclient(ev->window))) {
 311                 if(ev->atom == wmatom[WMProtocols]) {
 312                         c->proto = getproto(c->win);
 313                         return;
 314                 }
 315                 switch (ev->atom) {
 316                         default: break;
 317                         case XA_WM_TRANSIENT_FOR:
 318                                 XGetTransientForHint(dpy, c->win, &trans);
 319                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 320                                         arrange();
 321                                 break;
 322                         case XA_WM_NORMAL_HINTS:
 323                                 updatesizehints(c);
 324                                 break;
 325                 }
 326                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 327                         updatetitle(c);
 328                         if(c == sel)
 329                                 drawstatus();
 330                 }
 331         }
 332 }
 333
 334 static void
 335 unmapnotify(XEvent *e) {
 336         Client *c;
 337         XUnmapEvent *ev = &e->xunmap;
 338
 339         if((c = getclient(ev->window)))
 340                 unmanage(c);
 341 }
 342
 343 /* extern */
 344
 345 void (*handler[LASTEvent]) (XEvent *) = {
 346         [ButtonPress] = buttonpress,
 347         [ConfigureRequest] = configurerequest,
 348         [DestroyNotify] = destroynotify,
 349         [EnterNotify] = enternotify,
 350         [LeaveNotify] = leavenotify,
 351         [Expose] = expose,
 352         [KeyPress] = keypress,
 353         [MappingNotify] = mappingnotify,
 354         [MapRequest] = maprequest,
 355         [PropertyNotify] = propertynotify,
 356         [UnmapNotify] = unmapnotify
 357 };
 358
 359 void
 360 grabkeys(void) {
 361         static unsigned int len = sizeof key / sizeof key[0];
 362         unsigned int i;
 363         KeyCode code;
 364
 365         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 366         for(i = 0; i < len; i++) {
 367                 code = XKeysymToKeycode(dpy, key[i].keysym);
 368                 XGrabKey(dpy, code, key[i].mod, root, True,
 369                                 GrabModeAsync, GrabModeAsync);
 370                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 371                                 GrabModeAsync, GrabModeAsync);
 372                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 373                                 GrabModeAsync, GrabModeAsync);
 374                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 375                                 GrabModeAsync, GrabModeAsync);
 376         }
 377 }
 378
 379 void
 380 procevent(void) {
 381         XEvent ev;
 382
 383         while(XPending(dpy)) {
 384                 XNextEvent(dpy, &ev);
 385                 if(handler[ev.type])
 386                         (handler[ev.type])(&ev); /* call handler */
 387         }
 388 }