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