event.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dwm.h"
   6 #include <stdlib.h>
   7 #include <X11/keysym.h>
   8 #include <X11/Xatom.h>
   9
  10 /* static */
  11
  12 typedef struct {
  13         unsigned long mod;
  14         KeySym keysym;
  15         void (*func)(Arg *arg);
  16         Arg arg;
  17 } Key;
  18
  19 KEYS
  20
  21 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  22
  23 static void
  24 synconfig(Client *c, int x, int y, int w, int h, unsigned int border) {
  25         XEvent synev;
  26
  27         synev.type = ConfigureNotify;
  28         synev.xconfigure.display = dpy;
  29         synev.xconfigure.event = c->win;
  30         synev.xconfigure.window = c->win;
  31         synev.xconfigure.x = x;
  32         synev.xconfigure.y = y;
  33         synev.xconfigure.width = w;
  34         synev.xconfigure.height = h;
  35         synev.xconfigure.border_width = border;
  36         synev.xconfigure.above = None;
  37         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
  38 }
  39
  40 static void
  41 movemouse(Client *c) {
  42         int x1, y1, ocx, ocy, di;
  43         unsigned int dui;
  44         Window dummy;
  45         XEvent ev;
  46
  47         ocx = c->x;
  48         ocy = c->y;
  49         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  50                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  51                 return;
  52         c->ismax = False;
  53         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  54         for(;;) {
  55                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | StructureNotifyMask, &ev);
  56                 switch (ev.type) {
  57                 default:
  58                         break;
  59                 case ConfigureRequest:
  60                         synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);
  61                         XSync(dpy, False);
  62                         break;
  63                 case Expose:
  64                         handler[Expose](&ev);
  65                         break;
  66                 case MotionNotify:
  67                         XSync(dpy, False);
  68                         c->x = ocx + (ev.xmotion.x - x1);
  69                         c->y = ocy + (ev.xmotion.y - y1);
  70                         resize(c, False, TopLeft);
  71                         break;
  72                 case ButtonRelease:
  73                         XUngrabPointer(dpy, CurrentTime);
  74                         return;
  75                 case DestroyNotify:
  76                 case UnmapNotify:
  77                         XUngrabPointer(dpy, CurrentTime);
  78                         handler[ev.type](&ev);
  79                         return;
  80                 }
  81         }
  82 }
  83
  84 static void
  85 resizemouse(Client *c) {
  86         int ocx, ocy;
  87         int nw, nh;
  88         Corner sticky;
  89         XEvent ev;
  90
  91         ocx = c->x;
  92         ocy = c->y;
  93         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  94                                 None, cursor[CurResize], CurrentTime) != GrabSuccess)
  95                 return;
  96         c->ismax = False;
  97         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
  98         for(;;) {
  99                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | StructureNotifyMask, &ev);
 100                 switch(ev.type) {
 101                 default:
 102                         break;
 103                 case ConfigureRequest:
 104                         synconfig(c, c->x, c->y, c->w, c->h, ev.xconfigure.border_width);
 105                         XSync(dpy, False);
 106                         break;
 107                 case Expose:
 108                         handler[Expose](&ev);
 109                         break;
 110                 case MotionNotify:
 111                         XSync(dpy, False);
 112                         if((nw = abs(ocx - ev.xmotion.x)))
 113                                 c->w = nw;
 114                         if((nh = abs(ocy - ev.xmotion.y)))
 115                                 c->h = nh;
 116                         c->x = (ocx <= ev.xmotion.x) ? ocx : ocx - c->w;
 117                         c->y = (ocy <= ev.xmotion.y) ? ocy : ocy - c->h;
 118                         if(ocx <= ev.xmotion.x)
 119                                 sticky = (ocy <= ev.xmotion.y) ? TopLeft : BotLeft;
 120                         else
 121                                 sticky = (ocy <= ev.xmotion.y) ? TopRight : BotRight;
 122                         resize(c, True, sticky);
 123                         break;
 124                 case ButtonRelease:
 125                         XUngrabPointer(dpy, CurrentTime);
 126                         return;
 127                 case DestroyNotify:
 128                 case UnmapNotify:
 129                         XUngrabPointer(dpy, CurrentTime);
 130                         handler[ev.type](&ev);
 131                         return;
 132                 }
 133         }
 134 }
 135
 136 static void
 137 buttonpress(XEvent *e) {
 138         int x;
 139         Arg a;
 140         Client *c;
 141         XButtonPressedEvent *ev = &e->xbutton;
 142
 143         if(barwin == ev->window) {
 144                 x = 0;
 145                 for(a.i = 0; a.i < ntags; a.i++) {
 146                         x += textw(tags[a.i]);
 147                         if(ev->x < x) {
 148                                 if(ev->button == Button1) {
 149                                         if(ev->state & MODKEY)
 150                                                 tag(&a);
 151                                         else
 152                                                 view(&a);
 153                                 }
 154                                 else if(ev->button == Button3) {
 155                                         if(ev->state & MODKEY)
 156                                                 toggletag(&a);
 157                                         else
 158                                                 toggleview(&a);
 159                                 }
 160                                 return;
 161                         }
 162                 }
 163                 if(ev->x < x + bmw) {
 164                         if(ev->button == Button1)
 165                                 togglemode(NULL);
 166                 }
 167         }
 168         else if((c = getclient(ev->window))) {
 169                 focus(c);
 170                 if(CLEANMASK(ev->state) != MODKEY)
 171                         return;
 172                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 173                         restack(c);
 174                         movemouse(c);
 175                 }
 176                 else if(ev->button == Button2)
 177                         zoom(NULL);
 178                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {
 179                         restack(c);
 180                         resizemouse(c);
 181                 }
 182         }
 183 }
 184
 185 static void
 186 configurerequest(XEvent *e) {
 187         unsigned long newmask;
 188         Client *c;
 189         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 190         XWindowChanges wc;
 191
 192         if((c = getclient(ev->window))) {
 193                 if((c == sel) && !c->isfloat && (arrange != dofloat)) {
 194                         synconfig(c, sx, sy + bh, sw - 2, sh - 2 - bh, ev->border_width);
 195                         XSync(dpy, False);
 196                         return;
 197                 }
 198                 gravitate(c, True);
 199                 if(ev->value_mask & CWX)
 200                         c->x = ev->x;
 201                 if(ev->value_mask & CWY)
 202                         c->y = ev->y;
 203                 if(ev->value_mask & CWWidth)
 204                         c->w = ev->width;
 205                 if(ev->value_mask & CWHeight)
 206                         c->h = ev->height;
 207                 if(ev->value_mask & CWBorderWidth)
 208                         c->border = ev->border_width;
 209                 gravitate(c, False);
 210                 wc.x = c->x;
 211                 wc.y = c->y;
 212                 wc.width = c->w;
 213                 wc.height = c->h;
 214                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 215                 if(newmask)
 216                         XConfigureWindow(dpy, c->win, newmask, &wc);
 217                 else
 218                         synconfig(c, c->x, c->y, c->w, c->h, c->border);
 219                 XSync(dpy, False);
 220                 if(c->isfloat)
 221                         resize(c, False, TopLeft);
 222                 else
 223                         arrange(NULL);
 224         }
 225         else {
 226                 wc.x = ev->x;
 227                 wc.y = ev->y;
 228                 wc.width = ev->width;
 229                 wc.height = ev->height;
 230                 wc.border_width = ev->border_width;
 231                 wc.sibling = ev->above;
 232                 wc.stack_mode = ev->detail;
 233                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 234                 XSync(dpy, False);
 235         }
 236 }
 237
 238 static void
 239 destroynotify(XEvent *e) {
 240         Client *c;
 241         XDestroyWindowEvent *ev = &e->xdestroywindow;
 242
 243         if((c = getclient(ev->window)))
 244                 unmanage(c);
 245 }
 246
 247 static void
 248 enternotify(XEvent *e) {
 249         Client *c;
 250         XCrossingEvent *ev = &e->xcrossing;
 251
 252         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 253                 return;
 254
 255         if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))
 256                 focus(c);
 257         else if(ev->window == root) {
 258                 issel = True;
 259                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 260                 drawall();
 261         }
 262 }
 263
 264 static void
 265 expose(XEvent *e) {
 266         Client *c;
 267         XExposeEvent *ev = &e->xexpose;
 268
 269         if(ev->count == 0) {
 270                 if(barwin == ev->window)
 271                         drawstatus();
 272                 else if((c = getctitle(ev->window)))
 273                         drawtitle(c);
 274         }
 275 }
 276
 277 static void
 278 keypress(XEvent *e) {
 279         static unsigned int len = sizeof(key) / sizeof(key[0]);
 280         unsigned int i;
 281         KeySym keysym;
 282         XKeyEvent *ev = &e->xkey;
 283
 284         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 285         for(i = 0; i < len; i++) {
 286                 if(keysym == key[i].keysym
 287                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 288                 {
 289                         if(key[i].func)
 290                                 key[i].func(&key[i].arg);
 291                         return;
 292                 }
 293         }
 294 }
 295
 296 static void
 297 leavenotify(XEvent *e) {
 298         XCrossingEvent *ev = &e->xcrossing;
 299
 300         if((ev->window == root) && !ev->same_screen) {
 301                 issel = False;
 302                 drawall();
 303         }
 304 }
 305
 306 static void
 307 mappingnotify(XEvent *e) {
 308         XMappingEvent *ev = &e->xmapping;
 309
 310         XRefreshKeyboardMapping(ev);
 311         if(ev->request == MappingKeyboard)
 312                 grabkeys();
 313 }
 314
 315 static void
 316 maprequest(XEvent *e) {
 317         static XWindowAttributes wa;
 318         XMapRequestEvent *ev = &e->xmaprequest;
 319
 320         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 321                 return;
 322
 323         if(wa.override_redirect) {
 324                 XSelectInput(dpy, ev->window,
 325                                 (StructureNotifyMask | PropertyChangeMask));
 326                 return;
 327         }
 328
 329         if(!getclient(ev->window))
 330                 manage(ev->window, &wa);
 331 }
 332
 333 static void
 334 propertynotify(XEvent *e) {
 335         Client *c;
 336         Window trans;
 337         XPropertyEvent *ev = &e->xproperty;
 338
 339         if(ev->state == PropertyDelete)
 340                 return; /* ignore */
 341
 342         if((c = getclient(ev->window))) {
 343                 if(ev->atom == wmatom[WMProtocols]) {
 344                         c->proto = getproto(c->win);
 345                         return;
 346                 }
 347                 switch (ev->atom) {
 348                         default: break;
 349                         case XA_WM_TRANSIENT_FOR:
 350                                 XGetTransientForHint(dpy, c->win, &trans);
 351                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 352                                         arrange(NULL);
 353                                 break;
 354                         case XA_WM_NORMAL_HINTS:
 355                                 updatesize(c);
 356                                 break;
 357                 }
 358                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 359                         updatetitle(c);
 360                         drawtitle(c);
 361                 }
 362         }
 363 }
 364
 365 static void
 366 unmapnotify(XEvent *e) {
 367         Client *c;
 368         XUnmapEvent *ev = &e->xunmap;
 369
 370         if((c = getclient(ev->window)))
 371                 unmanage(c);
 372 }
 373
 374 /* extern */
 375
 376 void (*handler[LASTEvent]) (XEvent *) = {
 377         [ButtonPress] = buttonpress,
 378         [ConfigureRequest] = configurerequest,
 379         [DestroyNotify] = destroynotify,
 380         [EnterNotify] = enternotify,
 381         [LeaveNotify] = leavenotify,
 382         [Expose] = expose,
 383         [KeyPress] = keypress,
 384         [MappingNotify] = mappingnotify,
 385         [MapRequest] = maprequest,
 386         [PropertyNotify] = propertynotify,
 387         [UnmapNotify] = unmapnotify
 388 };
 389
 390 void
 391 grabkeys() {
 392         static unsigned int len = sizeof(key) / sizeof(key[0]);
 393         unsigned int i;
 394         KeyCode code;
 395
 396         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 397         for(i = 0; i < len; i++) {
 398                 code = XKeysymToKeycode(dpy, key[i].keysym);
 399                 XGrabKey(dpy, code, key[i].mod, root, True,
 400                                 GrabModeAsync, GrabModeAsync);
 401                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 402                                 GrabModeAsync, GrabModeAsync);
 403                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 404                                 GrabModeAsync, GrabModeAsync);
 405                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 406                                 GrabModeAsync, GrabModeAsync);
 407         }
 408 }
 409
 410 void
 411 procevent() {
 412         XEvent ev;
 413
 414         while(XPending(dpy)) {
 415                 XNextEvent(dpy, &ev);
 416                 if(handler[ev.type])
 417                         (handler[ev.type])(&ev); /* call handler */
 418         }
 419 }