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