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                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  86                                         c->w + c->border - 1, c->h + c->border - 1);
  87                         XUngrabPointer(dpy, CurrentTime);
  88                         return;
  89                 case ConfigureRequest:
  90                 case Expose:
  91                 case MapRequest:
  92                         handler[ev.type](&ev);
  93                         break;
  94                 case MotionNotify:
  95                         XSync(dpy, False);
  96                         nw = ev.xmotion.x - ocx - 2 * c->border + 1;
  97                         c->w = nw > 0 ? nw : 1;
  98                         nh = ev.xmotion.y - ocy - 2 * c->border + 1;
  99                         c->h = nh > 0 ? nh : 1;
 100                         resize(c, True);
 101                         break;
 102                 }
 103         }
 104 }
 105
 106 static void
 107 buttonpress(XEvent *e) {
 108         int x;
 109         Arg a;
 110         Client *c;
 111         XButtonPressedEvent *ev = &e->xbutton;
 112
 113         if(barwin == ev->window) {
 114                 x = 0;
 115                 for(a.i = 0; a.i < ntags; a.i++) {
 116                         x += textw(tags[a.i]);
 117                         if(ev->x < x) {
 118                                 if(ev->button == Button1) {
 119                                         if(ev->state & MODKEY)
 120                                                 tag(&a);
 121                                         else
 122                                                 view(&a);
 123                                 }
 124                                 else if(ev->button == Button3) {
 125                                         if(ev->state & MODKEY)
 126                                                 toggletag(&a);
 127                                         else
 128                                                 toggleview(&a);
 129                                 }
 130                                 return;
 131                         }
 132                 }
 133                 if(ev->x < x + bmw)
 134                         switch(ev->button) {
 135                         case Button1:
 136                                 togglemode(NULL);
 137                                 break;
 138                         case Button4:
 139                                 a.i = 1;
 140                                 incnmaster(&a);
 141                                 break;
 142                         case Button5:
 143                                 a.i = -1;
 144                                 incnmaster(&a);
 145                                 break;
 146                         }
 147         }
 148         else if((c = getclient(ev->window))) {
 149                 focus(c);
 150                 if(CLEANMASK(ev->state) != MODKEY)
 151                         return;
 152                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 153                         restack();
 154                         movemouse(c);
 155                 }
 156                 else if(ev->button == Button2)
 157                         zoom(NULL);
 158                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat) &&
 159                                 !c->isfixed) {
 160                         restack();
 161                         resizemouse(c);
 162                 }
 163         }
 164 }
 165
 166 static void
 167 configurerequest(XEvent *e) {
 168         unsigned long newmask;
 169         Client *c;
 170         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 171         XWindowChanges wc;
 172
 173         if((c = getclient(ev->window))) {
 174                 c->ismax = False;
 175                 if(ev->value_mask & CWX)
 176                         c->x = ev->x;
 177                 if(ev->value_mask & CWY)
 178                         c->y = ev->y;
 179                 if(ev->value_mask & CWWidth)
 180                         c->w = ev->width;
 181                 if(ev->value_mask & CWHeight)
 182                         c->h = ev->height;
 183                 if(ev->value_mask & CWBorderWidth)
 184                         c->border = ev->border_width;
 185                 wc.x = c->x;
 186                 wc.y = c->y;
 187                 wc.width = c->w;
 188                 wc.height = c->h;
 189                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 190                 if(newmask)
 191                         XConfigureWindow(dpy, c->win, newmask, &wc);
 192                 else
 193                         configure(c);
 194                 XSync(dpy, False);
 195                 if(c->isfloat) {
 196                         resize(c, False);
 197                         if(!isvisible(c))
 198                                 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 199                 }
 200                 else
 201                         arrange();
 202         }
 203         else {
 204                 wc.x = ev->x;
 205                 wc.y = ev->y;
 206                 wc.width = ev->width;
 207                 wc.height = ev->height;
 208                 wc.border_width = ev->border_width;
 209                 wc.sibling = ev->above;
 210                 wc.stack_mode = ev->detail;
 211                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 212                 XSync(dpy, False);
 213         }
 214 }
 215
 216 static void
 217 destroynotify(XEvent *e) {
 218         Client *c;
 219         XDestroyWindowEvent *ev = &e->xdestroywindow;
 220
 221         if((c = getclient(ev->window)))
 222                 unmanage(c);
 223 }
 224
 225 static void
 226 enternotify(XEvent *e) {
 227         Client *c;
 228         XCrossingEvent *ev = &e->xcrossing;
 229
 230         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 231                 return;
 232         if((c = getclient(ev->window)) && isvisible(c))
 233                 focus(c);
 234         else if(ev->window == root) {
 235                 selscreen = True;
 236                 for(c = stack; c && !isvisible(c); c = c->snext);
 237                 focus(c);
 238         }
 239 }
 240
 241 static void
 242 expose(XEvent *e) {
 243         XExposeEvent *ev = &e->xexpose;
 244
 245         if(ev->count == 0) {
 246                 if(barwin == ev->window)
 247                         drawstatus();
 248         }
 249 }
 250
 251 static void
 252 keypress(XEvent *e) {
 253         static unsigned int len = sizeof key / sizeof key[0];
 254         unsigned int i;
 255         KeySym keysym;
 256         XKeyEvent *ev = &e->xkey;
 257
 258         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 259         for(i = 0; i < len; i++) {
 260                 if(keysym == key[i].keysym
 261                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 262                 {
 263                         if(key[i].func)
 264                                 key[i].func(&key[i].arg);
 265                 }
 266         }
 267 }
 268
 269 static void
 270 leavenotify(XEvent *e) {
 271         XCrossingEvent *ev = &e->xcrossing;
 272
 273         if((ev->window == root) && !ev->same_screen) {
 274                 selscreen = False;
 275                 focus(NULL);
 276         }
 277 }
 278
 279 static void
 280 mappingnotify(XEvent *e) {
 281         XMappingEvent *ev = &e->xmapping;
 282
 283         XRefreshKeyboardMapping(ev);
 284         if(ev->request == MappingKeyboard)
 285                 grabkeys();
 286 }
 287
 288 static void
 289 maprequest(XEvent *e) {
 290         static XWindowAttributes wa;
 291         XMapRequestEvent *ev = &e->xmaprequest;
 292
 293         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 294                 return;
 295         if(wa.override_redirect) {
 296                 XSelectInput(dpy, ev->window,
 297                                 (StructureNotifyMask | PropertyChangeMask));
 298                 return;
 299         }
 300         if(!getclient(ev->window))
 301                 manage(ev->window, &wa);
 302 }
 303
 304 static void
 305 propertynotify(XEvent *e) {
 306         Client *c;
 307         Window trans;
 308         XPropertyEvent *ev = &e->xproperty;
 309
 310         if(ev->state == PropertyDelete)
 311                 return; /* ignore */
 312         if((c = getclient(ev->window))) {
 313                 switch (ev->atom) {
 314                         default: break;
 315                         case XA_WM_TRANSIENT_FOR:
 316                                 XGetTransientForHint(dpy, c->win, &trans);
 317                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 318                                         arrange();
 319                                 break;
 320                         case XA_WM_NORMAL_HINTS:
 321                                 updatesizehints(c);
 322                                 break;
 323                 }
 324                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 325                         updatetitle(c);
 326                         if(c == sel)
 327                                 drawstatus();
 328                 }
 329         }
 330 }
 331
 332 static void
 333 unmapnotify(XEvent *e) {
 334         Client *c;
 335         XUnmapEvent *ev = &e->xunmap;
 336
 337         if((c = getclient(ev->window)))
 338                 unmanage(c);
 339 }
 340
 341 /* extern */
 342
 343 void (*handler[LASTEvent]) (XEvent *) = {
 344         [ButtonPress] = buttonpress,
 345         [ConfigureRequest] = configurerequest,
 346         [DestroyNotify] = destroynotify,
 347         [EnterNotify] = enternotify,
 348         [LeaveNotify] = leavenotify,
 349         [Expose] = expose,
 350         [KeyPress] = keypress,
 351         [MappingNotify] = mappingnotify,
 352         [MapRequest] = maprequest,
 353         [PropertyNotify] = propertynotify,
 354         [UnmapNotify] = unmapnotify
 355 };
 356
 357 void
 358 grabkeys(void) {
 359         static unsigned int len = sizeof key / sizeof key[0];
 360         unsigned int i;
 361         KeyCode code;
 362
 363         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 364         for(i = 0; i < len; i++) {
 365                 code = XKeysymToKeycode(dpy, key[i].keysym);
 366                 XGrabKey(dpy, code, key[i].mod, root, True,
 367                                 GrabModeAsync, GrabModeAsync);
 368                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 369                                 GrabModeAsync, GrabModeAsync);
 370                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 371                                 GrabModeAsync, GrabModeAsync);
 372                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 373                                 GrabModeAsync, GrabModeAsync);
 374         }
 375 }
 376
 377 void
 378 procevent(void) {
 379         XEvent ev;
 380
 381         while(XPending(dpy)) {
 382                 XNextEvent(dpy, &ev);
 383                 if(handler[ev.type])
 384                         (handler[ev.type])(&ev); /* call handler */
 385         }
 386 }