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, &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(wax + c->x) < SNAP)
  52                                 c->x = wax;
  53                         else if(abs((wax + waw) - (c->x + c->w)) < SNAP)
  54                                 c->x = wax + waw - c->w - 2 * BORDERPX;
  55                         if(abs(way - c->y) < SNAP)
  56                                 c->y = way;
  57                         else if(abs((way + wah) - (c->y + c->h)) < SNAP)
  58                                 c->y = way + wah - 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)
 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, TopLeft);
 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                 issel = True;
 237                 focus(sel);
 238         }
 239 }
 240
 241 static void
 242 expose(XEvent *e) {
 243         XExposeEvent *ev = &e->xexpose;
 244
 245         if(ev->count == 0) {
 246                 if(barwin == ev->window)
 247                         drawstatus();
 248         }
 249 }
 250
 251 static void
 252 keypress(XEvent *e) {
 253         static unsigned int len = sizeof key / sizeof key[0];
 254         unsigned int i;
 255         KeySym keysym;
 256         XKeyEvent *ev = &e->xkey;
 257
 258         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 259         for(i = 0; i < len; i++) {
 260                 if(keysym == key[i].keysym
 261                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 262                 {
 263                         if(key[i].func)
 264                                 key[i].func(&key[i].arg);
 265                 }
 266         }
 267 }
 268
 269 static void
 270 leavenotify(XEvent *e) {
 271         XCrossingEvent *ev = &e->xcrossing;
 272
 273         if((ev->window == root) && !ev->same_screen) {
 274                 focus(NULL);
 275                 issel = False;
 276         }
 277 }
 278
 279 static void
 280 mappingnotify(XEvent *e) {
 281         XMappingEvent *ev = &e->xmapping;
 282
 283         XRefreshKeyboardMapping(ev);
 284         if(ev->request == MappingKeyboard)
 285                 grabkeys();
 286 }
 287
 288 static void
 289 maprequest(XEvent *e) {
 290         static XWindowAttributes wa;
 291         XMapRequestEvent *ev = &e->xmaprequest;
 292
 293         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 294                 return;
 295         if(wa.override_redirect) {
 296                 XSelectInput(dpy, ev->window,
 297                                 (StructureNotifyMask | PropertyChangeMask));
 298                 return;
 299         }
 300         if(!getclient(ev->window))
 301                 manage(ev->window, &wa);
 302 }
 303
 304 static void
 305 propertynotify(XEvent *e) {
 306         Client *c;
 307         Window trans;
 308         XPropertyEvent *ev = &e->xproperty;
 309
 310         if(ev->state == PropertyDelete)
 311                 return; /* ignore */
 312         if((c = getclient(ev->window))) {
 313                 if(ev->atom == wmatom[WMProtocols]) {
 314                         c->proto = getproto(c->win);
 315                         return;
 316                 }
 317                 switch (ev->atom) {
 318                         default: break;
 319                         case XA_WM_TRANSIENT_FOR:
 320                                 XGetTransientForHint(dpy, c->win, &trans);
 321                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 322                                         arrange();
 323                                 break;
 324                         case XA_WM_NORMAL_HINTS:
 325                                 updatesizehints(c);
 326                                 break;
 327                 }
 328                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 329                         updatetitle(c);
 330                         if(c == sel)
 331                                 drawstatus();
 332                 }
 333         }
 334 }
 335
 336 static void
 337 unmapnotify(XEvent *e) {
 338         Client *c;
 339         XUnmapEvent *ev = &e->xunmap;
 340
 341         if((c = getclient(ev->window)))
 342                 unmanage(c);
 343 }
 344
 345 /* extern */
 346
 347 void (*handler[LASTEvent]) (XEvent *) = {
 348         [ButtonPress] = buttonpress,
 349         [ConfigureRequest] = configurerequest,
 350         [DestroyNotify] = destroynotify,
 351         [EnterNotify] = enternotify,
 352         [LeaveNotify] = leavenotify,
 353         [Expose] = expose,
 354         [KeyPress] = keypress,
 355         [MappingNotify] = mappingnotify,
 356         [MapRequest] = maprequest,
 357         [PropertyNotify] = propertynotify,
 358         [UnmapNotify] = unmapnotify
 359 };
 360
 361 void
 362 grabkeys(void) {
 363         static unsigned int len = sizeof key / sizeof key[0];
 364         unsigned int i;
 365         KeyCode code;
 366
 367         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 368         for(i = 0; i < len; i++) {
 369                 code = XKeysymToKeycode(dpy, key[i].keysym);
 370                 XGrabKey(dpy, code, key[i].mod, root, True,
 371                                 GrabModeAsync, GrabModeAsync);
 372                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 373                                 GrabModeAsync, GrabModeAsync);
 374                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 375                                 GrabModeAsync, GrabModeAsync);
 376                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 377                                 GrabModeAsync, GrabModeAsync);
 378         }
 379 }
 380
 381 void
 382 procevent(void) {
 383         XEvent ev;
 384
 385         while(XPending(dpy)) {
 386                 XNextEvent(dpy, &ev);
 387                 if(handler[ev.type])
 388                         (handler[ev.type])(&ev); /* call handler */
 389         }
 390 }