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                 {
 162                         restack();
 163                         resizemouse(c);
 164                 }
 165         }
 166 }
 167
 168 static void
 169 configurerequest(XEvent *e) {
 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 & CWBorderWidth)
 177                         c->border = ev->border_width;
 178                 if(c->isfixed || c->isfloat || (arrange == dofloat)) {
 179                         if(ev->value_mask & CWX)
 180                                 c->x = ev->x;
 181                         if(ev->value_mask & CWY)
 182                                 c->y = ev->y;
 183                         if(ev->value_mask & CWWidth)
 184                                 c->w = ev->width;
 185                         if(ev->value_mask & CWHeight)
 186                                 c->h = ev->height;
 187                         if((ev->value_mask & (CWX | CWY)) && !(ev->value_mask & (CWWidth | CWHeight)))
 188                                 configure(c);
 189                         resize(c, False);
 190                         if(!isvisible(c))
 191                                 XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
 192                 }
 193                 else
 194                         configure(c);
 195         }
 196         else {
 197                 wc.x = ev->x;
 198                 wc.y = ev->y;
 199                 wc.width = ev->width;
 200                 wc.height = ev->height;
 201                 wc.border_width = ev->border_width;
 202                 wc.sibling = ev->above;
 203                 wc.stack_mode = ev->detail;
 204                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 205         }
 206         XSync(dpy, False);
 207 }
 208
 209 static void
 210 destroynotify(XEvent *e) {
 211         Client *c;
 212         XDestroyWindowEvent *ev = &e->xdestroywindow;
 213
 214         if((c = getclient(ev->window)))
 215                 unmanage(c);
 216 }
 217
 218 static void
 219 enternotify(XEvent *e) {
 220         Client *c;
 221         XCrossingEvent *ev = &e->xcrossing;
 222
 223         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 224                 return;
 225         if((c = getclient(ev->window)) && isvisible(c))
 226                 focus(c);
 227         else if(ev->window == root) {
 228                 selscreen = True;
 229                 for(c = stack; c && !isvisible(c); c = c->snext);
 230                 focus(c);
 231         }
 232 }
 233
 234 static void
 235 expose(XEvent *e) {
 236         XExposeEvent *ev = &e->xexpose;
 237
 238         if(ev->count == 0) {
 239                 if(barwin == ev->window)
 240                         drawstatus();
 241         }
 242 }
 243
 244 static void
 245 keypress(XEvent *e) {
 246         static unsigned int len = sizeof key / sizeof key[0];
 247         unsigned int i;
 248         KeySym keysym;
 249         XKeyEvent *ev = &e->xkey;
 250
 251         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 252         for(i = 0; i < len; i++) {
 253                 if(keysym == key[i].keysym
 254                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 255                 {
 256                         if(key[i].func)
 257                                 key[i].func(&key[i].arg);
 258                 }
 259         }
 260 }
 261
 262 static void
 263 leavenotify(XEvent *e) {
 264         XCrossingEvent *ev = &e->xcrossing;
 265
 266         if((ev->window == root) && !ev->same_screen) {
 267                 selscreen = False;
 268                 focus(NULL);
 269         }
 270 }
 271
 272 static void
 273 mappingnotify(XEvent *e) {
 274         XMappingEvent *ev = &e->xmapping;
 275
 276         XRefreshKeyboardMapping(ev);
 277         if(ev->request == MappingKeyboard)
 278                 grabkeys();
 279 }
 280
 281 static void
 282 maprequest(XEvent *e) {
 283         static XWindowAttributes wa;
 284         XMapRequestEvent *ev = &e->xmaprequest;
 285
 286         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 287                 return;
 288         if(wa.override_redirect)
 289                 return;
 290         if(!getclient(ev->window))
 291                 manage(ev->window, &wa);
 292 }
 293
 294 static void
 295 propertynotify(XEvent *e) {
 296         Client *c;
 297         Window trans;
 298         XPropertyEvent *ev = &e->xproperty;
 299
 300         if(ev->state == PropertyDelete)
 301                 return; /* ignore */
 302         if((c = getclient(ev->window))) {
 303                 switch (ev->atom) {
 304                         default: break;
 305                         case XA_WM_TRANSIENT_FOR:
 306                                 XGetTransientForHint(dpy, c->win, &trans);
 307                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 308                                         arrange();
 309                                 break;
 310                         case XA_WM_NORMAL_HINTS:
 311                                 updatesizehints(c);
 312                                 break;
 313                 }
 314                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 315                         updatetitle(c);
 316                         if(c == sel)
 317                                 drawstatus();
 318                 }
 319         }
 320 }
 321
 322 static void
 323 unmapnotify(XEvent *e) {
 324         Client *c;
 325         XUnmapEvent *ev = &e->xunmap;
 326
 327         if((c = getclient(ev->window)))
 328                 unmanage(c);
 329 }
 330
 331 /* extern */
 332
 333 void (*handler[LASTEvent]) (XEvent *) = {
 334         [ButtonPress] = buttonpress,
 335         [ConfigureRequest] = configurerequest,
 336         [DestroyNotify] = destroynotify,
 337         [EnterNotify] = enternotify,
 338         [LeaveNotify] = leavenotify,
 339         [Expose] = expose,
 340         [KeyPress] = keypress,
 341         [MappingNotify] = mappingnotify,
 342         [MapRequest] = maprequest,
 343         [PropertyNotify] = propertynotify,
 344         [UnmapNotify] = unmapnotify
 345 };
 346
 347 void
 348 grabkeys(void) {
 349         static unsigned int len = sizeof key / sizeof key[0];
 350         unsigned int i;
 351         KeyCode code;
 352
 353         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 354         for(i = 0; i < len; i++) {
 355                 code = XKeysymToKeycode(dpy, key[i].keysym);
 356                 XGrabKey(dpy, code, key[i].mod, root, True,
 357                                 GrabModeAsync, GrabModeAsync);
 358                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 359                                 GrabModeAsync, GrabModeAsync);
 360                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 361                                 GrabModeAsync, GrabModeAsync);
 362                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 363                                 GrabModeAsync, GrabModeAsync);
 364         }
 365 }
 366
 367 void
 368 procevent(void) {
 369         XEvent ev;
 370
 371         while(XPending(dpy)) {
 372                 XNextEvent(dpy, &ev);
 373                 if(handler[ev.type])
 374                         (handler[ev.type])(&ev); /* call handler */
 375         }
 376 }