event.c

   1 /* (C)opyright MMVI 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(c->x) < sx + SNAP)
  52                                 c->x = sx;
  53                         else if(c->x + c->w > sx + sw - SNAP)
  54                                 c->x = sw - c->w - 2 * BORDERPX;
  55                         if(abs(c->y) < sy + bh + SNAP)
  56                                 c->y = sy + bh;
  57                         else if(c->y + c->h > sy + sh - SNAP)
  58                                 c->y = sh - 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                 gravitate(c, True);
 165                 if(ev->value_mask & CWX)
 166                         c->x = ev->x;
 167                 if(ev->value_mask & CWY)
 168                         c->y = ev->y;
 169                 if(ev->value_mask & CWWidth)
 170                         c->w = ev->width;
 171                 if(ev->value_mask & CWHeight)
 172                         c->h = ev->height;
 173                 if(ev->value_mask & CWBorderWidth)
 174                         c->border = ev->border_width;
 175                 gravitate(c, False);
 176                 wc.x = c->x;
 177                 wc.y = c->y;
 178                 wc.width = c->w;
 179                 wc.height = c->h;
 180                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 181                 if(newmask)
 182                         XConfigureWindow(dpy, c->win, newmask, &wc);
 183                 else
 184                         configure(c);
 185                 XSync(dpy, False);
 186                 if(c->isfloat) {
 187                         resize(c, False, TopLeft);
 188                         if(!isvisible(c))
 189                                 ban(c);
 190                 }
 191                 else
 192                         arrange();
 193         }
 194         else {
 195                 wc.x = ev->x;
 196                 wc.y = ev->y;
 197                 wc.width = ev->width;
 198                 wc.height = ev->height;
 199                 wc.border_width = ev->border_width;
 200                 wc.sibling = ev->above;
 201                 wc.stack_mode = ev->detail;
 202                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 203                 XSync(dpy, False);
 204         }
 205 }
 206
 207 static void
 208 destroynotify(XEvent *e) {
 209         Client *c;
 210         XDestroyWindowEvent *ev = &e->xdestroywindow;
 211
 212         if((c = getclient(ev->window)))
 213                 unmanage(c);
 214 }
 215
 216 static void
 217 enternotify(XEvent *e) {
 218         Client *c;
 219         XCrossingEvent *ev = &e->xcrossing;
 220
 221         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 222                 return;
 223         if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))
 224                 focus(c);
 225         else if(ev->window == root) {
 226                 issel = True;
 227                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 228                 drawall();
 229         }
 230 }
 231
 232 static void
 233 expose(XEvent *e) {
 234         Client *c;
 235         XExposeEvent *ev = &e->xexpose;
 236
 237         if(ev->count == 0) {
 238                 if(barwin == ev->window)
 239                         drawstatus();
 240                 else if((c = getctitle(ev->window)))
 241                         drawtitle(c);
 242         }
 243 }
 244
 245 static void
 246 keypress(XEvent *e) {
 247         static unsigned int len = sizeof(key) / sizeof(key[0]);
 248         unsigned int i;
 249         KeySym keysym;
 250         XKeyEvent *ev = &e->xkey;
 251
 252         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 253         for(i = 0; i < len; i++) {
 254                 if(keysym == key[i].keysym
 255                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 256                 {
 257                         if(key[i].func)
 258                                 key[i].func(&key[i].arg);
 259                         return;
 260                 }
 261         }
 262 }
 263
 264 static void
 265 leavenotify(XEvent *e) {
 266         XCrossingEvent *ev = &e->xcrossing;
 267
 268         if((ev->window == root) && !ev->same_screen) {
 269                 issel = False;
 270                 drawall();
 271         }
 272 }
 273
 274 static void
 275 mappingnotify(XEvent *e) {
 276         XMappingEvent *ev = &e->xmapping;
 277
 278         XRefreshKeyboardMapping(ev);
 279         if(ev->request == MappingKeyboard)
 280                 grabkeys();
 281 }
 282
 283 static void
 284 maprequest(XEvent *e) {
 285         static XWindowAttributes wa;
 286         XMapRequestEvent *ev = &e->xmaprequest;
 287
 288         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 289                 return;
 290         if(wa.override_redirect) {
 291                 XSelectInput(dpy, ev->window,
 292                                 (StructureNotifyMask | PropertyChangeMask));
 293                 return;
 294         }
 295         if(!getclient(ev->window))
 296                 manage(ev->window, &wa);
 297 }
 298
 299 static void
 300 propertynotify(XEvent *e) {
 301         Client *c;
 302         Window trans;
 303         XPropertyEvent *ev = &e->xproperty;
 304
 305         if(ev->state == PropertyDelete)
 306                 return; /* ignore */
 307         if((c = getclient(ev->window))) {
 308                 if(ev->atom == wmatom[WMProtocols]) {
 309                         c->proto = getproto(c->win);
 310                         return;
 311                 }
 312                 switch (ev->atom) {
 313                         default: break;
 314                         case XA_WM_TRANSIENT_FOR:
 315                                 XGetTransientForHint(dpy, c->win, &trans);
 316                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 317                                         arrange();
 318                                 break;
 319                         case XA_WM_NORMAL_HINTS:
 320                                 updatesize(c);
 321                                 break;
 322                 }
 323                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 324                         updatetitle(c);
 325                         resizetitle(c);
 326                         drawtitle(c);
 327                 }
 328         }
 329 }
 330
 331 static void
 332 unmapnotify(XEvent *e) {
 333         Client *c;
 334         XUnmapEvent *ev = &e->xunmap;
 335
 336         if((c = getclient(ev->window)))
 337                 unmanage(c);
 338 }
 339
 340 /* extern */
 341
 342 void (*handler[LASTEvent]) (XEvent *) = {
 343         [ButtonPress] = buttonpress,
 344         [ConfigureRequest] = configurerequest,
 345         [DestroyNotify] = destroynotify,
 346         [EnterNotify] = enternotify,
 347         [LeaveNotify] = leavenotify,
 348         [Expose] = expose,
 349         [KeyPress] = keypress,
 350         [MappingNotify] = mappingnotify,
 351         [MapRequest] = maprequest,
 352         [PropertyNotify] = propertynotify,
 353         [UnmapNotify] = unmapnotify
 354 };
 355
 356 void
 357 grabkeys(void) {
 358         static unsigned int len = sizeof(key) / sizeof(key[0]);
 359         unsigned int i;
 360         KeyCode code;
 361
 362         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 363         for(i = 0; i < len; i++) {
 364                 code = XKeysymToKeycode(dpy, key[i].keysym);
 365                 XGrabKey(dpy, code, key[i].mod, root, True,
 366                                 GrabModeAsync, GrabModeAsync);
 367                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 368                                 GrabModeAsync, GrabModeAsync);
 369                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 370                                 GrabModeAsync, GrabModeAsync);
 371                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 372                                 GrabModeAsync, GrabModeAsync);
 373         }
 374 }
 375
 376 void
 377 procevent(void) {
 378         XEvent ev;
 379
 380         while(XPending(dpy)) {
 381                 XNextEvent(dpy, &ev);
 382                 if(handler[ev.type])
 383                         (handler[ev.type])(&ev); /* call handler */
 384         }
 385 }