event.c

   1 /* (C)opyright MMVI-MMVII 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 | SubstructureRedirectMask, &ev);
  39                 switch (ev.type) {
  40                 case ButtonRelease:
  41                         resize(c, True);
  42                         XUngrabPointer(dpy, CurrentTime);
  43                         return;
  44                 case ConfigureRequest:
  45                 case Expose:
  46                 case MapRequest:
  47                         handler[ev.type](&ev);
  48                         break;
  49                 case MotionNotify:
  50                         XSync(dpy, False);
  51                         c->x = ocx + (ev.xmotion.x - x1);
  52                         c->y = ocy + (ev.xmotion.y - y1);
  53                         if(abs(wax + c->x) < SNAP)
  54                                 c->x = wax;
  55                         else if(abs((wax + waw) - (c->x + c->w + 2 * c->border)) < SNAP)
  56                                 c->x = wax + waw - c->w - 2 * c->border;
  57                         if(abs(way - c->y) < SNAP)
  58                                 c->y = way;
  59                         else if(abs((way + wah) - (c->y + c->h + 2 * c->border)) < SNAP)
  60                                 c->y = way + wah - c->h - 2 * c->border;
  61                         resize(c, False);
  62                         break;
  63                 }
  64         }
  65 }
  66
  67 static void
  68 resizemouse(Client *c) {
  69         int ocx, ocy;
  70         int nw, nh;
  71         XEvent ev;
  72
  73         ocx = c->x;
  74         ocy = c->y;
  75         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  76                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  77                 return;
  78         c->ismax = False;
  79         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  80         for(;;) {
  81                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  82                 switch(ev.type) {
  83                 case ButtonRelease:
  84                         resize(c, True);
  85                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  86                                         c->w + c->border - 1, c->h + c->border - 1);
  87                         XUngrabPointer(dpy, CurrentTime);
  88                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  89                         return;
  90                 case ConfigureRequest:
  91                 case Expose:
  92                 case MapRequest:
  93                         handler[ev.type](&ev);
  94                         break;
  95                 case MotionNotify:
  96                         XSync(dpy, False);
  97                         nw = ev.xmotion.x - ocx - 2 * c->border + 1;
  98                         c->w = nw > 0 ? nw : 1;
  99                         nh = ev.xmotion.y - ocy - 2 * c->border + 1;
 100                         c->h = nh > 0 ? nh : 1;
 101                         resize(c, True);
 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)
 135                         switch(ev->button) {
 136                         case Button1:
 137                                 togglemode(NULL);
 138                                 break;
 139                         case Button4:
 140                                 a.i = 1;
 141                                 incnmaster(&a);
 142                                 break;
 143                         case Button5:
 144                                 a.i = -1;
 145                                 incnmaster(&a);
 146                                 break;
 147                         }
 148         }
 149         else if((c = getclient(ev->window))) {
 150                 focus(c);
 151                 if(CLEANMASK(ev->state) != MODKEY)
 152                         return;
 153                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 154                         restack();
 155                         movemouse(c);
 156                 }
 157                 else if(ev->button == Button2)
 158                         zoom(NULL);
 159                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat) &&
 160                                 !c->isfixed) {
 161                         restack();
 162                         resizemouse(c);
 163                 }
 164         }
 165 }
 166
 167 static void
 168 configurerequest(XEvent *e) {
 169         unsigned long newmask;
 170         Client *c;
 171         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 172         XWindowChanges wc;
 173
 174         if((c = getclient(ev->window))) {
 175                 c->ismax = False;
 176                 if(ev->value_mask & CWX)
 177                         c->x = ev->x;
 178                 if(ev->value_mask & CWY)
 179                         c->y = ev->y;
 180                 if(ev->value_mask & CWWidth)
 181                         c->w = ev->width;
 182                 if(ev->value_mask & CWHeight)
 183                         c->h = ev->height;
 184                 if(ev->value_mask & CWBorderWidth)
 185                         c->border = ev->border_width;
 186                 wc.x = c->x;
 187                 wc.y = c->y;
 188                 wc.width = c->w;
 189                 wc.height = c->h;
 190                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 191                 if(newmask)
 192                         XConfigureWindow(dpy, c->win, newmask, &wc);
 193                 else
 194                         configure(c);
 195                 XSync(dpy, False);
 196                 if(c->isfloat) {
 197                         resize(c, False);
 198                         if(!isvisible(c))
 199                                 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 200                 }
 201                 else
 202                         arrange();
 203         }
 204         else {
 205                 wc.x = ev->x;
 206                 wc.y = ev->y;
 207                 wc.width = ev->width;
 208                 wc.height = ev->height;
 209                 wc.border_width = ev->border_width;
 210                 wc.sibling = ev->above;
 211                 wc.stack_mode = ev->detail;
 212                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 213                 XSync(dpy, False);
 214         }
 215 }
 216
 217 static void
 218 destroynotify(XEvent *e) {
 219         Client *c;
 220         XDestroyWindowEvent *ev = &e->xdestroywindow;
 221
 222         if((c = getclient(ev->window)))
 223                 unmanage(c);
 224 }
 225
 226 static void
 227 enternotify(XEvent *e) {
 228         Client *c;
 229         XCrossingEvent *ev = &e->xcrossing;
 230
 231         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 232                 return;
 233         if((c = getclient(ev->window)) && isvisible(c))
 234                 focus(c);
 235         else if(ev->window == root) {
 236                 selscreen = True;
 237                 for(c = stack; c && !isvisible(c); c = c->snext);
 238                 focus(c);
 239         }
 240 }
 241
 242 static void
 243 expose(XEvent *e) {
 244         XExposeEvent *ev = &e->xexpose;
 245
 246         if(ev->count == 0) {
 247                 if(barwin == ev->window)
 248                         drawstatus();
 249         }
 250 }
 251
 252 static void
 253 keypress(XEvent *e) {
 254         static unsigned int len = sizeof key / sizeof key[0];
 255         unsigned int i;
 256         KeySym keysym;
 257         XKeyEvent *ev = &e->xkey;
 258
 259         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 260         for(i = 0; i < len; i++) {
 261                 if(keysym == key[i].keysym
 262                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 263                 {
 264                         if(key[i].func)
 265                                 key[i].func(&key[i].arg);
 266                 }
 267         }
 268 }
 269
 270 static void
 271 leavenotify(XEvent *e) {
 272         XCrossingEvent *ev = &e->xcrossing;
 273
 274         if((ev->window == root) && !ev->same_screen) {
 275                 selscreen = False;
 276                 focus(NULL);
 277         }
 278 }
 279
 280 static void
 281 mappingnotify(XEvent *e) {
 282         XMappingEvent *ev = &e->xmapping;
 283
 284         XRefreshKeyboardMapping(ev);
 285         if(ev->request == MappingKeyboard)
 286                 grabkeys();
 287 }
 288
 289 static void
 290 maprequest(XEvent *e) {
 291         static XWindowAttributes wa;
 292         XMapRequestEvent *ev = &e->xmaprequest;
 293
 294         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 295                 return;
 296         if(wa.override_redirect) {
 297                 XSelectInput(dpy, ev->window,
 298                                 (StructureNotifyMask | PropertyChangeMask));
 299                 return;
 300         }
 301         if(!getclient(ev->window))
 302                 manage(ev->window, &wa);
 303 }
 304
 305 static void
 306 propertynotify(XEvent *e) {
 307         Client *c;
 308         Window trans;
 309         XPropertyEvent *ev = &e->xproperty;
 310
 311         if(ev->state == PropertyDelete)
 312                 return; /* ignore */
 313         if((c = getclient(ev->window))) {
 314                 switch (ev->atom) {
 315                         default: break;
 316                         case XA_WM_TRANSIENT_FOR:
 317                                 XGetTransientForHint(dpy, c->win, &trans);
 318                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 319                                         arrange();
 320                                 break;
 321                         case XA_WM_NORMAL_HINTS:
 322                                 updatesizehints(c);
 323                                 break;
 324                 }
 325                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 326                         updatetitle(c);
 327                         if(c == sel)
 328                                 drawstatus();
 329                 }
 330         }
 331 }
 332
 333 static void
 334 unmapnotify(XEvent *e) {
 335         Client *c;
 336         XUnmapEvent *ev = &e->xunmap;
 337
 338         if((c = getclient(ev->window)))
 339                 unmanage(c);
 340 }
 341
 342 /* extern */
 343
 344 void (*handler[LASTEvent]) (XEvent *) = {
 345         [ButtonPress] = buttonpress,
 346         [ConfigureRequest] = configurerequest,
 347         [DestroyNotify] = destroynotify,
 348         [EnterNotify] = enternotify,
 349         [LeaveNotify] = leavenotify,
 350         [Expose] = expose,
 351         [KeyPress] = keypress,
 352         [MappingNotify] = mappingnotify,
 353         [MapRequest] = maprequest,
 354         [PropertyNotify] = propertynotify,
 355         [UnmapNotify] = unmapnotify
 356 };
 357
 358 void
 359 grabkeys(void) {
 360         static unsigned int len = sizeof key / sizeof key[0];
 361         unsigned int i;
 362         KeyCode code;
 363
 364         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 365         for(i = 0; i < len; i++) {
 366                 code = XKeysymToKeycode(dpy, key[i].keysym);
 367                 XGrabKey(dpy, code, key[i].mod, root, True,
 368                                 GrabModeAsync, GrabModeAsync);
 369                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 370                                 GrabModeAsync, GrabModeAsync);
 371                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 372                                 GrabModeAsync, GrabModeAsync);
 373                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 374                                 GrabModeAsync, GrabModeAsync);
 375         }
 376 }
 377
 378 void
 379 procevent(void) {
 380         XEvent ev;
 381
 382         while(XPending(dpy)) {
 383                 XNextEvent(dpy, &ev);
 384                 if(handler[ev.type])
 385                         (handler[ev.type])(&ev); /* call handler */
 386         }
 387 }