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 Client *
  24 getclient(Window w) {
  25         Client *c;
  26
  27         for(c = clients; c && c->win != w; c = c->next);
  28         return c;
  29 }
  30
  31 static void
  32 movemouse(Client *c) {
  33         int x1, y1, ocx, ocy, di, nx, ny;
  34         unsigned int dui;
  35         Window dummy;
  36         XEvent ev;
  37
  38         ocx = nx = c->x;
  39         ocy = ny = c->y;
  40         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  41                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  42                 return;
  43         c->ismax = False;
  44         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  45         for(;;) {
  46                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  47                 switch (ev.type) {
  48                 case ButtonRelease:
  49                         XUngrabPointer(dpy, CurrentTime);
  50                         return;
  51                 case ConfigureRequest:
  52                 case Expose:
  53                 case MapRequest:
  54                         handler[ev.type](&ev);
  55                         break;
  56                 case MotionNotify:
  57                         XSync(dpy, False);
  58                         nx = ocx + (ev.xmotion.x - x1);
  59                         ny = ocy + (ev.xmotion.y - y1);
  60                         if(abs(wax + nx) < SNAP)
  61                                 nx = wax;
  62                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  63                                 nx = wax + waw - c->w - 2 * c->border;
  64                         if(abs(way - ny) < SNAP)
  65                                 ny = way;
  66                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  67                                 ny = way + wah - c->h - 2 * c->border;
  68                         resize(c, nx, ny, c->w, c->h, False);
  69                         break;
  70                 }
  71         }
  72 }
  73
  74 static void
  75 resizemouse(Client *c) {
  76         int ocx, ocy;
  77         int nw, nh;
  78         XEvent ev;
  79
  80         ocx = c->x;
  81         ocy = c->y;
  82         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  83                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  84                 return;
  85         c->ismax = False;
  86         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  87         for(;;) {
  88                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  89                 switch(ev.type) {
  90                 case ButtonRelease:
  91                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  92                                         c->w + c->border - 1, c->h + c->border - 1);
  93                         XUngrabPointer(dpy, CurrentTime);
  94                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  95                         return;
  96                 case ConfigureRequest:
  97                 case Expose:
  98                 case MapRequest:
  99                         handler[ev.type](&ev);
 100                         break;
 101                 case MotionNotify:
 102                         XSync(dpy, False);
 103                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 104                                 nw = 1;
 105                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 106                                 nh = 1;
 107                         resize(c, c->x, c->y, nw, nh, True);
 108                         break;
 109                 }
 110         }
 111 }
 112
 113 static void
 114 buttonpress(XEvent *e) {
 115         int x;
 116         Arg a;
 117         Client *c;
 118         XButtonPressedEvent *ev = &e->xbutton;
 119
 120         if(barwin == ev->window) {
 121                 x = 0;
 122                 for(a.i = 0; a.i < ntags; a.i++) {
 123                         x += textw(tags[a.i]);
 124                         if(ev->x < x) {
 125                                 if(ev->button == Button1) {
 126                                         if(ev->state & MODKEY)
 127                                                 tag(&a);
 128                                         else
 129                                                 view(&a);
 130                                 }
 131                                 else if(ev->button == Button3) {
 132                                         if(ev->state & MODKEY)
 133                                                 toggletag(&a);
 134                                         else
 135                                                 toggleview(&a);
 136                                 }
 137                                 return;
 138                         }
 139                 }
 140                 if(ev->x < x + bmw)
 141                         switch(ev->button) {
 142                         case Button1:
 143                                 togglemode(NULL);
 144                                 break;
 145                         case Button4:
 146                                 a.i = 1;
 147                                 incnmaster(&a);
 148                                 break;
 149                         case Button5:
 150                                 a.i = -1;
 151                                 incnmaster(&a);
 152                                 break;
 153                         }
 154         }
 155         else if((c = getclient(ev->window))) {
 156                 focus(c);
 157                 if(CLEANMASK(ev->state) != MODKEY)
 158                         return;
 159                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 160                         restack();
 161                         movemouse(c);
 162                 }
 163                 else if(ev->button == Button2)
 164                         zoom(NULL);
 165                 else if(ev->button == Button3
 166                 && (arrange == dofloat || c->isfloat) && !c->isfixed)
 167                 {
 168                         restack();
 169                         resizemouse(c);
 170                 }
 171         }
 172 }
 173
 174 static void
 175 configurerequest(XEvent *e) {
 176         Client *c;
 177         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 178         XWindowChanges wc;
 179
 180         if((c = getclient(ev->window))) {
 181                 c->ismax = False;
 182                 if(ev->value_mask & CWBorderWidth)
 183                         c->border = ev->border_width;
 184                 if(c->isfixed || c->isfloat || (arrange == dofloat)) {
 185                         if(ev->value_mask & CWX)
 186                                 c->x = ev->x;
 187                         if(ev->value_mask & CWY)
 188                                 c->y = ev->y;
 189                         if(ev->value_mask & CWWidth)
 190                                 c->w = ev->width;
 191                         if(ev->value_mask & CWHeight)
 192                                 c->h = ev->height;
 193                         if((ev->value_mask & (CWX | CWY))
 194                         && !(ev->value_mask & (CWWidth | CWHeight)))
 195                                 configure(c);
 196                         if(isvisible(c))
 197                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 198                 }
 199                 else
 200                         configure(c);
 201         }
 202         else {
 203                 wc.x = ev->x;
 204                 wc.y = ev->y;
 205                 wc.width = ev->width;
 206                 wc.height = ev->height;
 207                 wc.border_width = ev->border_width;
 208                 wc.sibling = ev->above;
 209                 wc.stack_mode = ev->detail;
 210                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 211         }
 212         XSync(dpy, False);
 213 }
 214
 215 static void
 216 destroynotify(XEvent *e) {
 217         Client *c;
 218         XDestroyWindowEvent *ev = &e->xdestroywindow;
 219
 220         if((c = getclient(ev->window)))
 221                 unmanage(c);
 222 }
 223
 224 static void
 225 enternotify(XEvent *e) {
 226         Client *c;
 227         XCrossingEvent *ev = &e->xcrossing;
 228
 229         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 230                 return;
 231         if((c = getclient(ev->window)) && isvisible(c))
 232                 focus(c);
 233         else if(ev->window == root) {
 234                 selscreen = True;
 235                 for(c = stack; c && !isvisible(c); c = c->snext);
 236                 focus(c);
 237         }
 238 }
 239
 240 static void
 241 expose(XEvent *e) {
 242         XExposeEvent *ev = &e->xexpose;
 243
 244         if(ev->count == 0) {
 245                 if(barwin == ev->window)
 246                         drawstatus();
 247         }
 248 }
 249
 250 static void
 251 keypress(XEvent *e) {
 252         static unsigned int len = sizeof key / sizeof key[0];
 253         unsigned int i;
 254         KeySym keysym;
 255         XKeyEvent *ev = &e->xkey;
 256
 257         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 258         for(i = 0; i < len; i++)
 259                 if(keysym == key[i].keysym
 260                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 261                 {
 262                         if(key[i].func)
 263                                 key[i].func(&key[i].arg);
 264                 }
 265 }
 266
 267 static void
 268 leavenotify(XEvent *e) {
 269         XCrossingEvent *ev = &e->xcrossing;
 270
 271         if((ev->window == root) && !ev->same_screen) {
 272                 selscreen = False;
 273                 focus(NULL);
 274         }
 275 }
 276
 277 static void
 278 mappingnotify(XEvent *e) {
 279         XMappingEvent *ev = &e->xmapping;
 280
 281         XRefreshKeyboardMapping(ev);
 282         if(ev->request == MappingKeyboard)
 283                 grabkeys();
 284 }
 285
 286 static void
 287 maprequest(XEvent *e) {
 288         static XWindowAttributes wa;
 289         XMapRequestEvent *ev = &e->xmaprequest;
 290
 291         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 292                 return;
 293         if(wa.override_redirect)
 294                 return;
 295         if(!getclient(ev->window))
 296                 manage(ev->window, &wa);
 297 }
 298
 299 static void
 300 propertynotify(XEvent *e) {
 301         Client *c;
 302         Window trans;
 303         XPropertyEvent *ev = &e->xproperty;
 304
 305         if(ev->state == PropertyDelete)
 306                 return; /* ignore */
 307         if((c = getclient(ev->window))) {
 308                 switch (ev->atom) {
 309                         default: break;
 310                         case XA_WM_TRANSIENT_FOR:
 311                                 XGetTransientForHint(dpy, c->win, &trans);
 312                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 313                                         arrange();
 314                                 break;
 315                         case XA_WM_NORMAL_HINTS:
 316                                 updatesizehints(c);
 317                                 break;
 318                 }
 319                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 320                         updatetitle(c);
 321                         if(c == sel)
 322                                 drawstatus();
 323                 }
 324         }
 325 }
 326
 327 static void
 328 unmapnotify(XEvent *e) {
 329         Client *c;
 330         XUnmapEvent *ev = &e->xunmap;
 331
 332         if((c = getclient(ev->window)))
 333                 unmanage(c);
 334 }
 335
 336 /* extern */
 337
 338 void (*handler[LASTEvent]) (XEvent *) = {
 339         [ButtonPress] = buttonpress,
 340         [ConfigureRequest] = configurerequest,
 341         [DestroyNotify] = destroynotify,
 342         [EnterNotify] = enternotify,
 343         [LeaveNotify] = leavenotify,
 344         [Expose] = expose,
 345         [KeyPress] = keypress,
 346         [MappingNotify] = mappingnotify,
 347         [MapRequest] = maprequest,
 348         [PropertyNotify] = propertynotify,
 349         [UnmapNotify] = unmapnotify
 350 };
 351
 352 void
 353 grabkeys(void) {
 354         static unsigned int len = sizeof key / sizeof key[0];
 355         unsigned int i;
 356         KeyCode code;
 357
 358         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 359         for(i = 0; i < len; i++) {
 360                 code = XKeysymToKeycode(dpy, key[i].keysym);
 361                 XGrabKey(dpy, code, key[i].mod, root, True,
 362                                 GrabModeAsync, GrabModeAsync);
 363                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 364                                 GrabModeAsync, GrabModeAsync);
 365                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 366                                 GrabModeAsync, GrabModeAsync);
 367                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 368                                 GrabModeAsync, GrabModeAsync);
 369         }
 370 }
 371
 372 void
 373 procevent(void) {
 374         XEvent ev;
 375
 376         while(XPending(dpy)) {
 377                 XNextEvent(dpy, &ev);
 378                 if(handler[ev.type])
 379                         (handler[ev.type])(&ev); /* call handler */
 380         }
 381 }