event.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <X11/keysym.h>
   6 #include <X11/Xatom.h>
   7
   8 /* static */
   9
  10 typedef struct {
  11         unsigned long mod;
  12         KeySym keysym;
  13         void (*func)(const char *arg);
  14         const char *arg;
  15 } Key;
  16
  17 KEYS
  18
  19 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  20 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  21
  22 static Client *
  23 getclient(Window w) {
  24         Client *c;
  25
  26         for(c = clients; c && c->win != w; c = c->next);
  27         return c;
  28 }
  29
  30 static void
  31 movemouse(Client *c) {
  32         int x1, y1, ocx, ocy, di, nx, ny;
  33         unsigned int dui;
  34         Window dummy;
  35         XEvent ev;
  36
  37         ocx = nx = c->x;
  38         ocy = ny = c->y;
  39         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  40                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  41                 return;
  42         c->ismax = False;
  43         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  44         for(;;) {
  45                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  46                 switch (ev.type) {
  47                 case ButtonRelease:
  48                         XUngrabPointer(dpy, CurrentTime);
  49                         return;
  50                 case ConfigureRequest:
  51                 case Expose:
  52                 case MapRequest:
  53                         handler[ev.type](&ev);
  54                         break;
  55                 case MotionNotify:
  56                         XSync(dpy, False);
  57                         nx = ocx + (ev.xmotion.x - x1);
  58                         ny = ocy + (ev.xmotion.y - y1);
  59                         if(abs(wax + nx) < SNAP)
  60                                 nx = wax;
  61                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  62                                 nx = wax + waw - c->w - 2 * c->border;
  63                         if(abs(way - ny) < SNAP)
  64                                 ny = way;
  65                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  66                                 ny = way + wah - c->h - 2 * c->border;
  67                         resize(c, nx, ny, c->w, c->h, False);
  68                         break;
  69                 }
  70         }
  71 }
  72
  73 static void
  74 resizemouse(Client *c) {
  75         int ocx, ocy;
  76         int nw, nh;
  77         XEvent ev;
  78
  79         ocx = c->x;
  80         ocy = c->y;
  81         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  82                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  83                 return;
  84         c->ismax = False;
  85         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  86         for(;;) {
  87                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  88                 switch(ev.type) {
  89                 case ButtonRelease:
  90                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  91                                         c->w + c->border - 1, c->h + c->border - 1);
  92                         XUngrabPointer(dpy, CurrentTime);
  93                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  94                         return;
  95                 case ConfigureRequest:
  96                 case Expose:
  97                 case MapRequest:
  98                         handler[ev.type](&ev);
  99                         break;
 100                 case MotionNotify:
 101                         XSync(dpy, False);
 102                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 103                                 nw = 1;
 104                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 105                                 nh = 1;
 106                         resize(c, c->x, c->y, nw, nh, True);
 107                         break;
 108                 }
 109         }
 110 }
 111
 112 static void
 113 buttonpress(XEvent *e) {
 114         static char buf[32];
 115         unsigned int i, x;
 116         Client *c;
 117         XButtonPressedEvent *ev = &e->xbutton;
 118
 119         buf[0] = 0;
 120         if(barwin == ev->window) {
 121                 x = 0;
 122                 for(i = 0; i < ntags; i++) {
 123                         x += textw(tags[i]);
 124                         if(ev->x < x) {
 125                                 snprintf(buf, sizeof buf, "%d", i);
 126                                 if(ev->button == Button1) {
 127                                         if(ev->state & MODKEY)
 128                                                 tag(buf);
 129                                         else
 130                                                 view(buf);
 131                                 }
 132                                 else if(ev->button == Button3) {
 133                                         if(ev->state & MODKEY)
 134                                                 toggletag(buf);
 135                                         else
 136                                                 toggleview(buf);
 137                                 }
 138                                 return;
 139                         }
 140                 }
 141                 if(ev->x < x + blw)
 142                         switch(ev->button) {
 143                         case Button1:
 144                                 setlayout(NULL);
 145                                 break;
 146                         }
 147         }
 148         else if((c = getclient(ev->window))) {
 149                 focus(c);
 150                 if(CLEANMASK(ev->state) != MODKEY)
 151                         return;
 152                 if(ev->button == Button1 && (lt->arrange == floating || c->isfloating)) {
 153                         restack();
 154                         movemouse(c);
 155                 }
 156                 else if(ev->button == Button2)
 157                         zoom(NULL);
 158                 else if(ev->button == Button3
 159                 && (lt->arrange == floating || c->isfloating) && !c->isfixed)
 160                 {
 161                         restack();
 162                         resizemouse(c);
 163                 }
 164         }
 165 }
 166
 167 static void
 168 configurerequest(XEvent *e) {
 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->isfloating || (lt->arrange == floating)) {
 178                         if(ev->value_mask & CWX)
 179                                 c->x = ev->x;
 180                         if(ev->value_mask & CWY)
 181                                 c->y = ev->y;
 182                         if(ev->value_mask & CWWidth)
 183                                 c->w = ev->width;
 184                         if(ev->value_mask & CWHeight)
 185                                 c->h = ev->height;
 186                         if((c->x + c->w) > sw && c->isfloating)
 187                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 188                         if((c->y + c->h) > sh && c->isfloating)
 189                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 190                         if((ev->value_mask & (CWX | CWY))
 191                         && !(ev->value_mask & (CWWidth | CWHeight)))
 192                                 configure(c);
 193                         if(isvisible(c))
 194                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 195                 }
 196                 else
 197                         configure(c);
 198         }
 199         else {
 200                 wc.x = ev->x;
 201                 wc.y = ev->y;
 202                 wc.width = ev->width;
 203                 wc.height = ev->height;
 204                 wc.border_width = ev->border_width;
 205                 wc.sibling = ev->above;
 206                 wc.stack_mode = ev->detail;
 207                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 208         }
 209         XSync(dpy, False);
 210 }
 211
 212 static void
 213 configurenotify(XEvent *e) {
 214         XConfigureEvent *ev = &e->xconfigure;
 215
 216         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 217                 sw = ev->width;
 218                 sh = ev->height;
 219                 XFreePixmap(dpy, dc.drawable);
 220                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 221                 XResizeWindow(dpy, barwin, sw, bh);
 222                 updatebarpos();
 223                 lt->arrange();
 224         }
 225 }
 226
 227 static void
 228 createnotify(XEvent *e) {
 229         static XWindowAttributes wa;
 230         XCreateWindowEvent *ev = &e->xcreatewindow;
 231
 232         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 233                 return;
 234         if(wa.override_redirect)
 235                 return;
 236         if(!getclient(ev->window) && (wa.map_state == IsViewable))
 237                 manage(ev->window, &wa);
 238 }
 239
 240 static void
 241 destroynotify(XEvent *e) {
 242         Client *c;
 243         XDestroyWindowEvent *ev = &e->xdestroywindow;
 244
 245         if((c = getclient(ev->window)))
 246                 unmanage(c);
 247 }
 248
 249 static void
 250 enternotify(XEvent *e) {
 251         Client *c;
 252         XCrossingEvent *ev = &e->xcrossing;
 253
 254         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 255                 return;
 256         if((c = getclient(ev->window)))
 257                 focus(c);
 258         else if(ev->window == root) {
 259                 selscreen = True;
 260                 focus(NULL);
 261         }
 262 }
 263
 264 static void
 265 expose(XEvent *e) {
 266         XExposeEvent *ev = &e->xexpose;
 267
 268         if(ev->count == 0) {
 269                 if(barwin == ev->window)
 270                         drawstatus();
 271         }
 272 }
 273
 274 static void
 275 keypress(XEvent *e) {
 276         static unsigned int len = sizeof key / sizeof key[0];
 277         unsigned int i;
 278         KeySym keysym;
 279         XKeyEvent *ev = &e->xkey;
 280
 281         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 282         for(i = 0; i < len; i++)
 283                 if(keysym == key[i].keysym
 284                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 285                 {
 286                         if(key[i].func)
 287                                 key[i].func(key[i].arg);
 288                 }
 289 }
 290
 291 static void
 292 leavenotify(XEvent *e) {
 293         XCrossingEvent *ev = &e->xcrossing;
 294
 295         if((ev->window == root) && !ev->same_screen) {
 296                 selscreen = False;
 297                 focus(NULL);
 298         }
 299 }
 300
 301 static void
 302 mappingnotify(XEvent *e) {
 303         XMappingEvent *ev = &e->xmapping;
 304
 305         XRefreshKeyboardMapping(ev);
 306         if(ev->request == MappingKeyboard)
 307                 grabkeys();
 308 }
 309
 310 static void
 311 maprequest(XEvent *e) {
 312         static XWindowAttributes wa;
 313         XMapRequestEvent *ev = &e->xmaprequest;
 314
 315         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 316                 return;
 317         if(wa.override_redirect)
 318                 return;
 319         if(!getclient(ev->window))
 320                 manage(ev->window, &wa);
 321 }
 322
 323 static void
 324 propertynotify(XEvent *e) {
 325         Client *c;
 326         Window trans;
 327         XPropertyEvent *ev = &e->xproperty;
 328
 329         if(ev->state == PropertyDelete)
 330                 return; /* ignore */
 331         if((c = getclient(ev->window))) {
 332                 switch (ev->atom) {
 333                         default: break;
 334                         case XA_WM_TRANSIENT_FOR:
 335                                 XGetTransientForHint(dpy, c->win, &trans);
 336                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 337                                         lt->arrange();
 338                                 break;
 339                         case XA_WM_NORMAL_HINTS:
 340                                 updatesizehints(c);
 341                                 break;
 342                 }
 343                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 344                         updatetitle(c);
 345                         if(c == sel)
 346                                 drawstatus();
 347                 }
 348         }
 349 }
 350
 351 static void
 352 unmapnotify(XEvent *e) {
 353         Client *c;
 354         XUnmapEvent *ev = &e->xunmap;
 355
 356         if((c = getclient(ev->window)))
 357                 unmanage(c);
 358 }
 359
 360 /* extern */
 361
 362 void (*handler[LASTEvent]) (XEvent *) = {
 363         [ButtonPress] = buttonpress,
 364         [ConfigureRequest] = configurerequest,
 365         [ConfigureNotify] = configurenotify,
 366         [CreateNotify] = createnotify,
 367         [DestroyNotify] = destroynotify,
 368         [EnterNotify] = enternotify,
 369         [LeaveNotify] = leavenotify,
 370         [Expose] = expose,
 371         [KeyPress] = keypress,
 372         [MappingNotify] = mappingnotify,
 373         [MapRequest] = maprequest,
 374         [PropertyNotify] = propertynotify,
 375         [UnmapNotify] = unmapnotify
 376 };
 377
 378 void
 379 grabkeys(void) {
 380         static unsigned int len = sizeof key / sizeof key[0];
 381         unsigned int i;
 382         KeyCode code;
 383
 384         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 385         for(i = 0; i < len; i++) {
 386                 code = XKeysymToKeycode(dpy, key[i].keysym);
 387                 XGrabKey(dpy, code, key[i].mod, root, True,
 388                                 GrabModeAsync, GrabModeAsync);
 389                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 390                                 GrabModeAsync, GrabModeAsync);
 391                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 392                                 GrabModeAsync, GrabModeAsync);
 393                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 394                                 GrabModeAsync, GrabModeAsync);
 395         }
 396 }