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, nx, ny;
  26         unsigned int dui;
  27         Window dummy;
  28         XEvent ev;
  29
  30         ocx = nx = c->x;
  31         ocy = ny = 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                         XUngrabPointer(dpy, CurrentTime);
  42                         return;
  43                 case ConfigureRequest:
  44                 case Expose:
  45                 case MapRequest:
  46                         handler[ev.type](&ev);
  47                         break;
  48                 case MotionNotify:
  49                         XSync(dpy, False);
  50                         nx = ocx + (ev.xmotion.x - x1);
  51                         ny = ocy + (ev.xmotion.y - y1);
  52                         if(abs(wax + nx) < SNAP)
  53                                 nx = wax;
  54                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  55                                 nx = wax + waw - c->w - 2 * c->border;
  56                         if(abs(way - ny) < SNAP)
  57                                 ny = way;
  58                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  59                                 ny = way + wah - c->h - 2 * c->border;
  60                         resize(c, nx, ny, c->w, c->h, False);
  61                         break;
  62                 }
  63         }
  64 }
  65
  66 static void
  67 resizemouse(Client *c) {
  68         int ocx, ocy;
  69         int nw, nh;
  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->border - 1, c->h + c->border - 1);
  79         for(;;) {
  80                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  81                 switch(ev.type) {
  82                 case ButtonRelease:
  83                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  84                                         c->w + c->border - 1, c->h + c->border - 1);
  85                         XUngrabPointer(dpy, CurrentTime);
  86                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  87                         return;
  88                 case ConfigureRequest:
  89                 case Expose:
  90                 case MapRequest:
  91                         handler[ev.type](&ev);
  92                         break;
  93                 case MotionNotify:
  94                         XSync(dpy, False);
  95                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
  96                                 nw = 1;
  97                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
  98                                 nh = 1;
  99                         resize(c, c->x, c->y, nw, nh, True);
 100                         break;
 101                 }
 102         }
 103 }
 104
 105 static void
 106 buttonpress(XEvent *e) {
 107         int x;
 108         Arg a;
 109         Client *c;
 110         XButtonPressedEvent *ev = &e->xbutton;
 111
 112         if(barwin == ev->window) {
 113                 x = 0;
 114                 for(a.i = 0; a.i < ntags; a.i++) {
 115                         x += textw(tags[a.i]);
 116                         if(ev->x < x) {
 117                                 if(ev->button == Button1) {
 118                                         if(ev->state & MODKEY)
 119                                                 tag(&a);
 120                                         else
 121                                                 view(&a);
 122                                 }
 123                                 else if(ev->button == Button3) {
 124                                         if(ev->state & MODKEY)
 125                                                 toggletag(&a);
 126                                         else
 127                                                 toggleview(&a);
 128                                 }
 129                                 return;
 130                         }
 131                 }
 132                 if(ev->x < x + bmw)
 133                         switch(ev->button) {
 134                         case Button1:
 135                                 togglemode(NULL);
 136                                 break;
 137                         case Button4:
 138                                 a.i = 1;
 139                                 incnmaster(&a);
 140                                 break;
 141                         case Button5:
 142                                 a.i = -1;
 143                                 incnmaster(&a);
 144                                 break;
 145                         }
 146         }
 147         else if((c = getclient(ev->window))) {
 148                 focus(c);
 149                 if(CLEANMASK(ev->state) != MODKEY)
 150                         return;
 151                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 152                         restack();
 153                         movemouse(c);
 154                 }
 155                 else if(ev->button == Button2)
 156                         zoom(NULL);
 157                 else if(ev->button == Button3
 158                 && (arrange == dofloat || c->isfloat) && !c->isfixed)
 159                 {
 160                         restack();
 161                         resizemouse(c);
 162                 }
 163         }
 164 }
 165
 166 static void
 167 configurerequest(XEvent *e) {
 168         Client *c;
 169         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 170         XWindowChanges wc;
 171
 172         if((c = getclient(ev->window))) {
 173                 c->ismax = False;
 174                 if(ev->value_mask & CWBorderWidth)
 175                         c->border = ev->border_width;
 176                 if(c->isfixed || c->isfloat || (arrange == dofloat)) {
 177                         if(ev->value_mask & CWX)
 178                                 c->x = ev->x;
 179                         if(ev->value_mask & CWY)
 180                                 c->y = ev->y;
 181                         if(ev->value_mask & CWWidth)
 182                                 c->w = ev->width;
 183                         if(ev->value_mask & CWHeight)
 184                                 c->h = ev->height;
 185                         if((ev->value_mask & (CWX | CWY))
 186                         && !(ev->value_mask & (CWWidth | CWHeight)))
 187                         {
 188                                 configure(c);
 189                                 if(isvisible(c))
 190                                         XMoveWindow(dpy, c->win, c->x, c->y);
 191                         }
 192                         else {
 193                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 194                                 if(!isvisible(c))
 195                                         ban(c);
 196                         }
 197                 }
 198                 else
 199                         configure(c);
 200         }
 201         else {
 202                 wc.x = ev->x;
 203                 wc.y = ev->y;
 204                 wc.width = ev->width;
 205                 wc.height = ev->height;
 206                 wc.border_width = ev->border_width;
 207                 wc.sibling = ev->above;
 208                 wc.stack_mode = ev->detail;
 209                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 210         }
 211         XSync(dpy, False);
 212 }
 213
 214 static void
 215 destroynotify(XEvent *e) {
 216         Client *c;
 217         XDestroyWindowEvent *ev = &e->xdestroywindow;
 218
 219         if((c = getclient(ev->window)))
 220                 unmanage(c);
 221 }
 222
 223 static void
 224 enternotify(XEvent *e) {
 225         Client *c;
 226         XCrossingEvent *ev = &e->xcrossing;
 227
 228         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 229                 return;
 230         if((c = getclient(ev->window)) && isvisible(c))
 231                 focus(c);
 232         else if(ev->window == root) {
 233                 selscreen = True;
 234                 for(c = stack; c && !isvisible(c); c = c->snext);
 235                 focus(c);
 236         }
 237 }
 238
 239 static void
 240 expose(XEvent *e) {
 241         XExposeEvent *ev = &e->xexpose;
 242
 243         if(ev->count == 0) {
 244                 if(barwin == ev->window)
 245                         drawstatus();
 246         }
 247 }
 248
 249 static void
 250 keypress(XEvent *e) {
 251         static unsigned int len = sizeof key / sizeof key[0];
 252         unsigned int i;
 253         KeySym keysym;
 254         XKeyEvent *ev = &e->xkey;
 255
 256         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 257         for(i = 0; i < len; i++)
 258                 if(keysym == key[i].keysym
 259                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 260                 {
 261                         if(key[i].func)
 262                                 key[i].func(&key[i].arg);
 263                 }
 264 }
 265
 266 static void
 267 leavenotify(XEvent *e) {
 268         XCrossingEvent *ev = &e->xcrossing;
 269
 270         if((ev->window == root) && !ev->same_screen) {
 271                 selscreen = False;
 272                 focus(NULL);
 273         }
 274 }
 275
 276 static void
 277 mappingnotify(XEvent *e) {
 278         XMappingEvent *ev = &e->xmapping;
 279
 280         XRefreshKeyboardMapping(ev);
 281         if(ev->request == MappingKeyboard)
 282                 grabkeys();
 283 }
 284
 285 static void
 286 maprequest(XEvent *e) {
 287         static XWindowAttributes wa;
 288         XMapRequestEvent *ev = &e->xmaprequest;
 289
 290         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 291                 return;
 292         if(wa.override_redirect)
 293                 return;
 294         if(!getclient(ev->window))
 295                 manage(ev->window, &wa);
 296 }
 297
 298 static void
 299 propertynotify(XEvent *e) {
 300         Client *c;
 301         Window trans;
 302         XPropertyEvent *ev = &e->xproperty;
 303
 304         if(ev->state == PropertyDelete)
 305                 return; /* ignore */
 306         if((c = getclient(ev->window))) {
 307                 switch (ev->atom) {
 308                         default: break;
 309                         case XA_WM_TRANSIENT_FOR:
 310                                 XGetTransientForHint(dpy, c->win, &trans);
 311                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 312                                         arrange();
 313                                 break;
 314                         case XA_WM_NORMAL_HINTS:
 315                                 updatesizehints(c);
 316                                 break;
 317                 }
 318                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 319                         updatetitle(c);
 320                         if(c == sel)
 321                                 drawstatus();
 322                 }
 323         }
 324 }
 325
 326 static void
 327 unmapnotify(XEvent *e) {
 328         Client *c;
 329         XUnmapEvent *ev = &e->xunmap;
 330
 331         if((c = getclient(ev->window)))
 332                 unmanage(c);
 333 }
 334
 335 /* extern */
 336
 337 void (*handler[LASTEvent]) (XEvent *) = {
 338         [ButtonPress] = buttonpress,
 339         [ConfigureRequest] = configurerequest,
 340         [DestroyNotify] = destroynotify,
 341         [EnterNotify] = enternotify,
 342         [LeaveNotify] = leavenotify,
 343         [Expose] = expose,
 344         [KeyPress] = keypress,
 345         [MappingNotify] = mappingnotify,
 346         [MapRequest] = maprequest,
 347         [PropertyNotify] = propertynotify,
 348         [UnmapNotify] = unmapnotify
 349 };
 350
 351 void
 352 grabkeys(void) {
 353         static unsigned int len = sizeof key / sizeof key[0];
 354         unsigned int i;
 355         KeyCode code;
 356
 357         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 358         for(i = 0; i < len; i++) {
 359                 code = XKeysymToKeycode(dpy, key[i].keysym);
 360                 XGrabKey(dpy, code, key[i].mod, root, True,
 361                                 GrabModeAsync, GrabModeAsync);
 362                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 363                                 GrabModeAsync, GrabModeAsync);
 364                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 365                                 GrabModeAsync, GrabModeAsync);
 366                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 367                                 GrabModeAsync, GrabModeAsync);
 368         }
 369 }
 370
 371 void
 372 procevent(void) {
 373         XEvent ev;
 374
 375         while(XPending(dpy)) {
 376                 XNextEvent(dpy, &ev);
 377                 if(handler[ev.type])
 378                         (handler[ev.type])(&ev); /* call handler */
 379         }
 380 }