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         int x, y, w, h;
 169         Client *c;
 170         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 171         XWindowChanges wc;
 172
 173         if((c = getclient(ev->window))) {
 174                 c->ismax = False;
 175                 if(ev->value_mask & CWBorderWidth)
 176                         c->border = ev->border_width;
 177                 if(c->isfixed || c->isfloat || (arrange == dofloat)) {
 178                         x = (ev->value_mask & CWX) ? ev->x : c->x;
 179                         y = (ev->value_mask & CWY) ? ev->y : c->y;
 180                         w = (ev->value_mask & CWWidth) ? ev->width : c->w;
 181                         h = (ev->value_mask & CWHeight) ? ev->height : c->h;
 182                         if((ev->value_mask & (CWX | CWY))
 183                         && !(ev->value_mask & (CWWidth | CWHeight)))
 184                         {
 185                                 c->x = x;
 186                                 c->y = y;
 187                                 configure(c);
 188                                 if(isvisible(c))
 189                                         XMoveWindow(dpy, c->win, c->x, c->y);
 190                         }
 191                         else {
 192                                 resize(c, x, y, w, h, False);
 193                                 if(!isvisible(c))
 194                                         ban(c);
 195                         }
 196                 }
 197                 else
 198                         configure(c);
 199         }
 200         else {
 201                 wc.x = ev->x;
 202                 wc.y = ev->y;
 203                 wc.width = ev->width;
 204                 wc.height = ev->height;
 205                 wc.border_width = ev->border_width;
 206                 wc.sibling = ev->above;
 207                 wc.stack_mode = ev->detail;
 208                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 209         }
 210         XSync(dpy, False);
 211 }
 212
 213 static void
 214 destroynotify(XEvent *e) {
 215         Client *c;
 216         XDestroyWindowEvent *ev = &e->xdestroywindow;
 217
 218         if((c = getclient(ev->window)))
 219                 unmanage(c);
 220 }
 221
 222 static void
 223 enternotify(XEvent *e) {
 224         Client *c;
 225         XCrossingEvent *ev = &e->xcrossing;
 226
 227         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 228                 return;
 229         if((c = getclient(ev->window)) && isvisible(c))
 230                 focus(c);
 231         else if(ev->window == root) {
 232                 selscreen = True;
 233                 for(c = stack; c && !isvisible(c); c = c->snext);
 234                 focus(c);
 235         }
 236 }
 237
 238 static void
 239 expose(XEvent *e) {
 240         XExposeEvent *ev = &e->xexpose;
 241
 242         if(ev->count == 0) {
 243                 if(barwin == ev->window)
 244                         drawstatus();
 245         }
 246 }
 247
 248 static void
 249 keypress(XEvent *e) {
 250         static unsigned int len = sizeof key / sizeof key[0];
 251         unsigned int i;
 252         KeySym keysym;
 253         XKeyEvent *ev = &e->xkey;
 254
 255         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 256         for(i = 0; i < len; i++)
 257                 if(keysym == key[i].keysym
 258                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 259                 {
 260                         if(key[i].func)
 261                                 key[i].func(&key[i].arg);
 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                 selscreen = False;
 271                 focus(NULL);
 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         if(wa.override_redirect)
 292                 return;
 293         if(!getclient(ev->window))
 294                 manage(ev->window, &wa);
 295 }
 296
 297 static void
 298 propertynotify(XEvent *e) {
 299         Client *c;
 300         Window trans;
 301         XPropertyEvent *ev = &e->xproperty;
 302
 303         if(ev->state == PropertyDelete)
 304                 return; /* ignore */
 305         if((c = getclient(ev->window))) {
 306                 switch (ev->atom) {
 307                         default: break;
 308                         case XA_WM_TRANSIENT_FOR:
 309                                 XGetTransientForHint(dpy, c->win, &trans);
 310                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 311                                         arrange();
 312                                 break;
 313                         case XA_WM_NORMAL_HINTS:
 314                                 updatesizehints(c);
 315                                 break;
 316                 }
 317                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 318                         updatetitle(c);
 319                         if(c == sel)
 320                                 drawstatus();
 321                 }
 322         }
 323 }
 324
 325 static void
 326 unmapnotify(XEvent *e) {
 327         Client *c;
 328         XUnmapEvent *ev = &e->xunmap;
 329
 330         if((c = getclient(ev->window)))
 331                 unmanage(c);
 332 }
 333
 334 /* extern */
 335
 336 void (*handler[LASTEvent]) (XEvent *) = {
 337         [ButtonPress] = buttonpress,
 338         [ConfigureRequest] = configurerequest,
 339         [DestroyNotify] = destroynotify,
 340         [EnterNotify] = enternotify,
 341         [LeaveNotify] = leavenotify,
 342         [Expose] = expose,
 343         [KeyPress] = keypress,
 344         [MappingNotify] = mappingnotify,
 345         [MapRequest] = maprequest,
 346         [PropertyNotify] = propertynotify,
 347         [UnmapNotify] = unmapnotify
 348 };
 349
 350 void
 351 grabkeys(void) {
 352         static unsigned int len = sizeof key / sizeof key[0];
 353         unsigned int i;
 354         KeyCode code;
 355
 356         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 357         for(i = 0; i < len; i++) {
 358                 code = XKeysymToKeycode(dpy, key[i].keysym);
 359                 XGrabKey(dpy, code, key[i].mod, root, True,
 360                                 GrabModeAsync, GrabModeAsync);
 361                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 362                                 GrabModeAsync, GrabModeAsync);
 363                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 364                                 GrabModeAsync, GrabModeAsync);
 365                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 366                                 GrabModeAsync, GrabModeAsync);
 367         }
 368 }
 369
 370 void
 371 procevent(void) {
 372         XEvent ev;
 373
 374         while(XPending(dpy)) {
 375                 XNextEvent(dpy, &ev);
 376                 if(handler[ev.type])
 377                         (handler[ev.type])(&ev); /* call handler */
 378         }
 379 }