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