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