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();
 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();
 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                 c->ismax = False;
 194                 gravitate(c, True);
 195                 if(ev->value_mask & CWX)
 196                         c->x = ev->x;
 197                 if(ev->value_mask & CWY)
 198                         c->y = ev->y;
 199                 if(ev->value_mask & CWWidth)
 200                         c->w = ev->width;
 201                 if(ev->value_mask & CWHeight)
 202                         c->h = ev->height;
 203                 if(ev->value_mask & CWBorderWidth)
 204                         c->border = ev->border_width;
 205                 gravitate(c, False);
 206                 wc.x = c->x;
 207                 wc.y = c->y;
 208                 wc.width = c->w;
 209                 wc.height = c->h;
 210                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 211                 if(newmask)
 212                         XConfigureWindow(dpy, c->win, newmask, &wc);
 213                 else
 214                         synconfig(c, c->x, c->y, c->w, c->h, c->border);
 215                 XSync(dpy, False);
 216                 if(c->isfloat)
 217                         resize(c, False, TopLeft);
 218                 else
 219                         arrange(NULL);
 220         }
 221         else {
 222                 wc.x = ev->x;
 223                 wc.y = ev->y;
 224                 wc.width = ev->width;
 225                 wc.height = ev->height;
 226                 wc.border_width = ev->border_width;
 227                 wc.sibling = ev->above;
 228                 wc.stack_mode = ev->detail;
 229                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 230                 XSync(dpy, False);
 231         }
 232 }
 233
 234 static void
 235 destroynotify(XEvent *e) {
 236         Client *c;
 237         XDestroyWindowEvent *ev = &e->xdestroywindow;
 238
 239         if((c = getclient(ev->window)))
 240                 unmanage(c);
 241 }
 242
 243 static void
 244 enternotify(XEvent *e) {
 245         Client *c;
 246         XCrossingEvent *ev = &e->xcrossing;
 247
 248         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 249                 return;
 250
 251         if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))
 252                 focus(c);
 253         else if(ev->window == root) {
 254                 issel = True;
 255                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 256                 drawall();
 257         }
 258 }
 259
 260 static void
 261 expose(XEvent *e) {
 262         Client *c;
 263         XExposeEvent *ev = &e->xexpose;
 264
 265         if(ev->count == 0) {
 266                 if(barwin == ev->window)
 267                         drawstatus();
 268                 else if((c = getctitle(ev->window)))
 269                         drawtitle(c);
 270         }
 271 }
 272
 273 static void
 274 keypress(XEvent *e) {
 275         static unsigned int len = sizeof(key) / sizeof(key[0]);
 276         unsigned int i;
 277         KeySym keysym;
 278         XKeyEvent *ev = &e->xkey;
 279
 280         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 281         for(i = 0; i < len; i++) {
 282                 if(keysym == key[i].keysym
 283                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 284                 {
 285                         if(key[i].func)
 286                                 key[i].func(&key[i].arg);
 287                         return;
 288                 }
 289         }
 290 }
 291
 292 static void
 293 leavenotify(XEvent *e) {
 294         XCrossingEvent *ev = &e->xcrossing;
 295
 296         if((ev->window == root) && !ev->same_screen) {
 297                 issel = False;
 298                 drawall();
 299         }
 300 }
 301
 302 static void
 303 mappingnotify(XEvent *e) {
 304         XMappingEvent *ev = &e->xmapping;
 305
 306         XRefreshKeyboardMapping(ev);
 307         if(ev->request == MappingKeyboard)
 308                 grabkeys();
 309 }
 310
 311 static void
 312 maprequest(XEvent *e) {
 313         static XWindowAttributes wa;
 314         XMapRequestEvent *ev = &e->xmaprequest;
 315
 316         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 317                 return;
 318
 319         if(wa.override_redirect) {
 320                 XSelectInput(dpy, ev->window,
 321                                 (StructureNotifyMask | PropertyChangeMask));
 322                 return;
 323         }
 324
 325         if(!getclient(ev->window))
 326                 manage(ev->window, &wa);
 327 }
 328
 329 static void
 330 propertynotify(XEvent *e) {
 331         Client *c;
 332         Window trans;
 333         XPropertyEvent *ev = &e->xproperty;
 334
 335         if(ev->state == PropertyDelete)
 336                 return; /* ignore */
 337
 338         if((c = getclient(ev->window))) {
 339                 if(ev->atom == wmatom[WMProtocols]) {
 340                         c->proto = getproto(c->win);
 341                         return;
 342                 }
 343                 switch (ev->atom) {
 344                         default: break;
 345                         case XA_WM_TRANSIENT_FOR:
 346                                 XGetTransientForHint(dpy, c->win, &trans);
 347                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 348                                         arrange(NULL);
 349                                 break;
 350                         case XA_WM_NORMAL_HINTS:
 351                                 updatesize(c);
 352                                 break;
 353                 }
 354                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 355                         updatetitle(c);
 356                         drawtitle(c);
 357                 }
 358         }
 359 }
 360
 361 static void
 362 unmapnotify(XEvent *e) {
 363         Client *c;
 364         XUnmapEvent *ev = &e->xunmap;
 365
 366         if((c = getclient(ev->window)))
 367                 unmanage(c);
 368 }
 369
 370 /* extern */
 371
 372 void (*handler[LASTEvent]) (XEvent *) = {
 373         [ButtonPress] = buttonpress,
 374         [ConfigureRequest] = configurerequest,
 375         [DestroyNotify] = destroynotify,
 376         [EnterNotify] = enternotify,
 377         [LeaveNotify] = leavenotify,
 378         [Expose] = expose,
 379         [KeyPress] = keypress,
 380         [MappingNotify] = mappingnotify,
 381         [MapRequest] = maprequest,
 382         [PropertyNotify] = propertynotify,
 383         [UnmapNotify] = unmapnotify
 384 };
 385
 386 void
 387 grabkeys(void) {
 388         static unsigned int len = sizeof(key) / sizeof(key[0]);
 389         unsigned int i;
 390         KeyCode code;
 391
 392         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 393         for(i = 0; i < len; i++) {
 394                 code = XKeysymToKeycode(dpy, key[i].keysym);
 395                 XGrabKey(dpy, code, key[i].mod, root, True,
 396                                 GrabModeAsync, GrabModeAsync);
 397                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 398                                 GrabModeAsync, GrabModeAsync);
 399                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 400                                 GrabModeAsync, GrabModeAsync);
 401                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 402                                 GrabModeAsync, GrabModeAsync);
 403         }
 404 }
 405
 406 void
 407 procevent(void) {
 408         XEvent ev;
 409
 410         while(XPending(dpy)) {
 411                 XNextEvent(dpy, &ev);
 412                 if(handler[ev.type])
 413                         (handler[ev.type])(&ev); /* call handler */
 414         }
 415 }