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) && ev->button == Button1)
 142                         setlayout(NULL);
 143         }
 144         else if((c = getclient(ev->window))) {
 145                 focus(c);
 146                 if(CLEANMASK(ev->state) != MODKEY)
 147                         return;
 148                 if(ev->button == Button1 && (lt->arrange == floating || c->isfloating)) {
 149                         restack();
 150                         movemouse(c);
 151                 }
 152                 else if(ev->button == Button2)
 153                         zoom(NULL);
 154                 else if(ev->button == Button3
 155                 && (lt->arrange == floating || c->isfloating) && !c->isfixed)
 156                 {
 157                         restack();
 158                         resizemouse(c);
 159                 }
 160         }
 161 }
 162
 163 static void
 164 configurerequest(XEvent *e) {
 165         Client *c;
 166         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 167         XWindowChanges wc;
 168
 169         if((c = getclient(ev->window))) {
 170                 c->ismax = False;
 171                 if(ev->value_mask & CWBorderWidth)
 172                         c->border = ev->border_width;
 173                 if(c->isfixed || c->isfloating || (lt->arrange == floating)) {
 174                         if(ev->value_mask & CWX)
 175                                 c->x = ev->x;
 176                         if(ev->value_mask & CWY)
 177                                 c->y = ev->y;
 178                         if(ev->value_mask & CWWidth)
 179                                 c->w = ev->width;
 180                         if(ev->value_mask & CWHeight)
 181                                 c->h = ev->height;
 182                         if((c->x + c->w) > sw && c->isfloating)
 183                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 184                         if((c->y + c->h) > sh && c->isfloating)
 185                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 186                         if((ev->value_mask & (CWX | CWY))
 187                         && !(ev->value_mask & (CWWidth | CWHeight)))
 188                                 configure(c);
 189                         if(isvisible(c))
 190                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 191                 }
 192                 else
 193                         configure(c);
 194         }
 195         else {
 196                 wc.x = ev->x;
 197                 wc.y = ev->y;
 198                 wc.width = ev->width;
 199                 wc.height = ev->height;
 200                 wc.border_width = ev->border_width;
 201                 wc.sibling = ev->above;
 202                 wc.stack_mode = ev->detail;
 203                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 204         }
 205         XSync(dpy, False);
 206 }
 207
 208 static void
 209 configurenotify(XEvent *e) {
 210         XConfigureEvent *ev = &e->xconfigure;
 211
 212         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 213                 sw = ev->width;
 214                 sh = ev->height;
 215                 XFreePixmap(dpy, dc.drawable);
 216                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 217                 XResizeWindow(dpy, barwin, sw, bh);
 218                 updatebarpos();
 219                 lt->arrange();
 220         }
 221 }
 222
 223 static void
 224 destroynotify(XEvent *e) {
 225         Client *c;
 226         XDestroyWindowEvent *ev = &e->xdestroywindow;
 227
 228         if((c = getclient(ev->window)))
 229                 unmanage(c);
 230 }
 231
 232 static void
 233 enternotify(XEvent *e) {
 234         Client *c;
 235         XCrossingEvent *ev = &e->xcrossing;
 236
 237         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 238                 return;
 239         if((c = getclient(ev->window)))
 240                 focus(c);
 241         else if(ev->window == root) {
 242                 selscreen = True;
 243                 focus(NULL);
 244         }
 245 }
 246
 247 static void
 248 expose(XEvent *e) {
 249         XExposeEvent *ev = &e->xexpose;
 250
 251         if(ev->count == 0) {
 252                 if(barwin == ev->window)
 253                         drawstatus();
 254         }
 255 }
 256
 257 static void
 258 keypress(XEvent *e) {
 259         static unsigned int len = sizeof key / sizeof key[0];
 260         unsigned int i;
 261         KeySym keysym;
 262         XKeyEvent *ev = &e->xkey;
 263
 264         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 265         for(i = 0; i < len; i++)
 266                 if(keysym == key[i].keysym
 267                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 268                 {
 269                         if(key[i].func)
 270                                 key[i].func(key[i].arg);
 271                 }
 272 }
 273
 274 static void
 275 leavenotify(XEvent *e) {
 276         XCrossingEvent *ev = &e->xcrossing;
 277
 278         if((ev->window == root) && !ev->same_screen) {
 279                 selscreen = False;
 280                 focus(NULL);
 281         }
 282 }
 283
 284 static void
 285 mappingnotify(XEvent *e) {
 286         XMappingEvent *ev = &e->xmapping;
 287
 288         XRefreshKeyboardMapping(ev);
 289         if(ev->request == MappingKeyboard)
 290                 grabkeys();
 291 }
 292
 293 static void
 294 maprequest(XEvent *e) {
 295         static XWindowAttributes wa;
 296         XMapRequestEvent *ev = &e->xmaprequest;
 297
 298         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 299                 return;
 300         if(wa.override_redirect)
 301                 return;
 302         if(!getclient(ev->window))
 303                 manage(ev->window, &wa);
 304 }
 305
 306 static void
 307 propertynotify(XEvent *e) {
 308         Client *c;
 309         Window trans;
 310         XPropertyEvent *ev = &e->xproperty;
 311
 312         if(ev->state == PropertyDelete)
 313                 return; /* ignore */
 314         if((c = getclient(ev->window))) {
 315                 switch (ev->atom) {
 316                         default: break;
 317                         case XA_WM_TRANSIENT_FOR:
 318                                 XGetTransientForHint(dpy, c->win, &trans);
 319                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 320                                         lt->arrange();
 321                                 break;
 322                         case XA_WM_NORMAL_HINTS:
 323                                 updatesizehints(c);
 324                                 break;
 325                 }
 326                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 327                         updatetitle(c);
 328                         if(c == sel)
 329                                 drawstatus();
 330                 }
 331         }
 332 }
 333
 334 static void
 335 unmapnotify(XEvent *e) {
 336         Client *c;
 337         XUnmapEvent *ev = &e->xunmap;
 338
 339         if((c = getclient(ev->window)) && (ev->event == root)) {
 340                 if(ev->send_event || c->unmapped-- == 0)
 341                         unmanage(c);
 342         }
 343 }
 344
 345 /* extern */
 346
 347 void (*handler[LASTEvent]) (XEvent *) = {
 348         [ButtonPress] = buttonpress,
 349         [ConfigureRequest] = configurerequest,
 350         [ConfigureNotify] = configurenotify,
 351         [DestroyNotify] = destroynotify,
 352         [EnterNotify] = enternotify,
 353         [LeaveNotify] = leavenotify,
 354         [Expose] = expose,
 355         [KeyPress] = keypress,
 356         [MappingNotify] = mappingnotify,
 357         [MapRequest] = maprequest,
 358         [PropertyNotify] = propertynotify,
 359         [UnmapNotify] = unmapnotify
 360 };
 361
 362 void
 363 grabkeys(void) {
 364         static unsigned int len = sizeof key / sizeof key[0];
 365         unsigned int i;
 366         KeyCode code;
 367
 368         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 369         for(i = 0; i < len; i++) {
 370                 code = XKeysymToKeycode(dpy, key[i].keysym);
 371                 XGrabKey(dpy, code, key[i].mod, root, True,
 372                                 GrabModeAsync, GrabModeAsync);
 373                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 374                                 GrabModeAsync, GrabModeAsync);
 375                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 376                                 GrabModeAsync, GrabModeAsync);
 377                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 378                                 GrabModeAsync, GrabModeAsync);
 379         }
 380 }