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