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 + blw)
 141                         switch(ev->button) {
 142                         case Button1:
 143                                 a.i = -1;
 144                                 setlayout(&a);
 145                                 break;
 146                         case Button4:
 147                                 a.i = 1;
 148                                 incnmaster(&a);
 149                                 break;
 150                         case Button5:
 151                                 a.i = -1;
 152                                 incnmaster(&a);
 153                                 break;
 154                         }
 155         }
 156         else if((c = getclient(ev->window))) {
 157                 focus(c);
 158                 if(CLEANMASK(ev->state) != MODKEY)
 159                         return;
 160                 if(ev->button == Button1 && (lt->arrange == versatile || c->isversatile)) {
 161                         restack();
 162                         movemouse(c);
 163                 }
 164                 else if(ev->button == Button2)
 165                         zoom(NULL);
 166                 else if(ev->button == Button3
 167                 && (lt->arrange == versatile || c->isversatile) && !c->isfixed)
 168                 {
 169                         restack();
 170                         resizemouse(c);
 171                 }
 172         }
 173 }
 174
 175 static void
 176 configurerequest(XEvent *e) {
 177         Client *c;
 178         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 179         XWindowChanges wc;
 180
 181         if((c = getclient(ev->window))) {
 182                 c->ismax = False;
 183                 if(ev->value_mask & CWBorderWidth)
 184                         c->border = ev->border_width;
 185                 if(c->isfixed || c->isversatile || (lt->arrange == versatile)) {
 186                         if(ev->value_mask & CWX)
 187                                 c->x = ev->x;
 188                         if(ev->value_mask & CWY)
 189                                 c->y = ev->y;
 190                         if(ev->value_mask & CWWidth)
 191                                 c->w = ev->width;
 192                         if(ev->value_mask & CWHeight)
 193                                 c->h = ev->height;
 194                         if((ev->value_mask & (CWX | CWY))
 195                         && !(ev->value_mask & (CWWidth | CWHeight)))
 196                                 configure(c);
 197                         if(isvisible(c))
 198                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 199                 }
 200                 else
 201                         configure(c);
 202         }
 203         else {
 204                 wc.x = ev->x;
 205                 wc.y = ev->y;
 206                 wc.width = ev->width;
 207                 wc.height = ev->height;
 208                 wc.border_width = ev->border_width;
 209                 wc.sibling = ev->above;
 210                 wc.stack_mode = ev->detail;
 211                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 212         }
 213         XSync(dpy, False);
 214 }
 215
 216 static void
 217 destroynotify(XEvent *e) {
 218         Client *c;
 219         XDestroyWindowEvent *ev = &e->xdestroywindow;
 220
 221         if((c = getclient(ev->window)))
 222                 unmanage(c);
 223 }
 224
 225 static void
 226 enternotify(XEvent *e) {
 227         Client *c;
 228         XCrossingEvent *ev = &e->xcrossing;
 229
 230         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 231                 return;
 232         if((c = getclient(ev->window)) && isvisible(c))
 233                 focus(c);
 234         else if(ev->window == root) {
 235                 selscreen = True;
 236                 for(c = stack; c && !isvisible(c); c = c->snext);
 237                 focus(c);
 238         }
 239 }
 240
 241 static void
 242 expose(XEvent *e) {
 243         XExposeEvent *ev = &e->xexpose;
 244
 245         if(ev->count == 0) {
 246                 if(barwin == ev->window)
 247                         drawstatus();
 248         }
 249 }
 250
 251 static void
 252 keypress(XEvent *e) {
 253         static unsigned int len = sizeof key / sizeof key[0];
 254         unsigned int i;
 255         KeySym keysym;
 256         XKeyEvent *ev = &e->xkey;
 257
 258         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 259         for(i = 0; i < len; i++)
 260                 if(keysym == key[i].keysym
 261                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 262                 {
 263                         if(key[i].func)
 264                                 key[i].func(&key[i].arg);
 265                 }
 266 }
 267
 268 static void
 269 leavenotify(XEvent *e) {
 270         XCrossingEvent *ev = &e->xcrossing;
 271
 272         if((ev->window == root) && !ev->same_screen) {
 273                 selscreen = False;
 274                 focus(NULL);
 275         }
 276 }
 277
 278 static void
 279 mappingnotify(XEvent *e) {
 280         XMappingEvent *ev = &e->xmapping;
 281
 282         XRefreshKeyboardMapping(ev);
 283         if(ev->request == MappingKeyboard)
 284                 grabkeys();
 285 }
 286
 287 static void
 288 maprequest(XEvent *e) {
 289         static XWindowAttributes wa;
 290         XMapRequestEvent *ev = &e->xmaprequest;
 291
 292         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 293                 return;
 294         if(wa.override_redirect)
 295                 return;
 296         if(!getclient(ev->window))
 297                 manage(ev->window, &wa);
 298 }
 299
 300 static void
 301 propertynotify(XEvent *e) {
 302         Client *c;
 303         Window trans;
 304         XPropertyEvent *ev = &e->xproperty;
 305
 306         if(ev->state == PropertyDelete)
 307                 return; /* ignore */
 308         if((c = getclient(ev->window))) {
 309                 switch (ev->atom) {
 310                         default: break;
 311                         case XA_WM_TRANSIENT_FOR:
 312                                 XGetTransientForHint(dpy, c->win, &trans);
 313                                 if(!c->isversatile && (c->isversatile = (getclient(trans) != NULL)))
 314                                         lt->arrange();
 315                                 break;
 316                         case XA_WM_NORMAL_HINTS:
 317                                 updatesizehints(c);
 318                                 break;
 319                 }
 320                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 321                         updatetitle(c);
 322                         if(c == sel)
 323                                 drawstatus();
 324                 }
 325         }
 326 }
 327
 328 static void
 329 unmapnotify(XEvent *e) {
 330         Client *c;
 331         XUnmapEvent *ev = &e->xunmap;
 332
 333         if((c = getclient(ev->window)))
 334                 unmanage(c);
 335 }
 336
 337 /* extern */
 338
 339 void (*handler[LASTEvent]) (XEvent *) = {
 340         [ButtonPress] = buttonpress,
 341         [ConfigureRequest] = configurerequest,
 342         [DestroyNotify] = destroynotify,
 343         [EnterNotify] = enternotify,
 344         [LeaveNotify] = leavenotify,
 345         [Expose] = expose,
 346         [KeyPress] = keypress,
 347         [MappingNotify] = mappingnotify,
 348         [MapRequest] = maprequest,
 349         [PropertyNotify] = propertynotify,
 350         [UnmapNotify] = unmapnotify
 351 };
 352
 353 void
 354 grabkeys(void) {
 355         static unsigned int len = sizeof key / sizeof key[0];
 356         unsigned int i;
 357         KeyCode code;
 358
 359         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 360         for(i = 0; i < len; i++) {
 361                 code = XKeysymToKeycode(dpy, key[i].keysym);
 362                 XGrabKey(dpy, code, key[i].mod, root, True,
 363                                 GrabModeAsync, GrabModeAsync);
 364                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 365                                 GrabModeAsync, GrabModeAsync);
 366                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 367                                 GrabModeAsync, GrabModeAsync);
 368                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 369                                 GrabModeAsync, GrabModeAsync);
 370         }
 371 }