event.c

   1 /* © 2004-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details. */
   3 #include "dwm.h"
   4 #include <stdio.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)(const char *arg);
  15         const char *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         static char buf[32];
 116         unsigned int i, x;
 117         Client *c;
 118         XButtonPressedEvent *ev = &e->xbutton;
 119
 120         buf[0] = 0;
 121         if(barwin == ev->window) {
 122                 x = 0;
 123                 for(i = 0; i < ntags; i++) {
 124                         x += textw(tags[i]);
 125                         if(ev->x < x) {
 126                                 snprintf(buf, sizeof buf, "%d", i);
 127                                 if(ev->button == Button1) {
 128                                         if(ev->state & MODKEY)
 129                                                 tag(buf);
 130                                         else
 131                                                 view(buf);
 132                                 }
 133                                 else if(ev->button == Button3) {
 134                                         if(ev->state & MODKEY)
 135                                                 toggletag(buf);
 136                                         else
 137                                                 toggleview(buf);
 138                                 }
 139                                 return;
 140                         }
 141                 }
 142                 if(ev->x < x + blw)
 143                         switch(ev->button) {
 144                         case Button1:
 145                                 setlayout(NULL);
 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 && (lt->arrange == floating || c->isfloating)) {
 154                         restack();
 155                         movemouse(c);
 156                 }
 157                 else if(ev->button == Button2)
 158                         zoom(NULL);
 159                 else if(ev->button == Button3
 160                 && (lt->arrange == floating || c->isfloating) && !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(c->isfixed || c->isfloating || (lt->arrange == floating)) {
 177                         if(ev->value_mask & CWX)
 178                                 c->x = ev->x;
 179                         if(ev->value_mask & CWY)
 180                                 c->y = ev->y;
 181                         if(ev->value_mask & CWWidth)
 182                                 c->w = ev->width;
 183                         if(ev->value_mask & CWHeight)
 184                                 c->h = ev->height;
 185                         if((ev->value_mask & (CWX | CWY))
 186                         && !(ev->value_mask & (CWWidth | CWHeight)))
 187                                 configure(c);
 188                         if(isvisible(c))
 189                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 190                 }
 191                 else {
 192                         if(ev->value_mask & CWBorderWidth)
 193                                 c->border = ev->border_width;
 194                         configure(c);
 195                         c->border = BORDERPX;
 196                 }
 197         }
 198         else {
 199                 wc.x = ev->x;
 200                 wc.y = ev->y;
 201                 wc.width = ev->width;
 202                 wc.height = ev->height;
 203                 wc.border_width = ev->border_width;
 204                 wc.sibling = ev->above;
 205                 wc.stack_mode = ev->detail;
 206                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 207         }
 208         XSync(dpy, False);
 209 }
 210
 211 static void
 212 destroynotify(XEvent *e) {
 213         Client *c;
 214         XDestroyWindowEvent *ev = &e->xdestroywindow;
 215
 216         if((c = getclient(ev->window)))
 217                 unmanage(c);
 218 }
 219
 220 static void
 221 enternotify(XEvent *e) {
 222         Client *c;
 223         XCrossingEvent *ev = &e->xcrossing;
 224
 225         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 226                 return;
 227         if((c = getclient(ev->window)) && isvisible(c))
 228                 focus(c);
 229         else if(ev->window == root) {
 230                 selscreen = True;
 231                 for(c = stack; c && !isvisible(c); c = c->snext);
 232                 focus(c);
 233         }
 234 }
 235
 236 static void
 237 expose(XEvent *e) {
 238         XExposeEvent *ev = &e->xexpose;
 239
 240         if(ev->count == 0) {
 241                 if(barwin == ev->window)
 242                         drawstatus();
 243         }
 244 }
 245
 246 static void
 247 keypress(XEvent *e) {
 248         static unsigned int len = sizeof key / sizeof key[0];
 249         unsigned int i;
 250         KeySym keysym;
 251         XKeyEvent *ev = &e->xkey;
 252
 253         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 254         for(i = 0; i < len; i++)
 255                 if(keysym == key[i].keysym
 256                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 257                 {
 258                         if(key[i].func)
 259                                 key[i].func(key[i].arg);
 260                 }
 261 }
 262
 263 static void
 264 leavenotify(XEvent *e) {
 265         XCrossingEvent *ev = &e->xcrossing;
 266
 267         if((ev->window == root) && !ev->same_screen) {
 268                 selscreen = False;
 269                 focus(NULL);
 270         }
 271 }
 272
 273 static void
 274 mappingnotify(XEvent *e) {
 275         XMappingEvent *ev = &e->xmapping;
 276
 277         XRefreshKeyboardMapping(ev);
 278         if(ev->request == MappingKeyboard)
 279                 grabkeys();
 280 }
 281
 282 static void
 283 maprequest(XEvent *e) {
 284         static XWindowAttributes wa;
 285         XMapRequestEvent *ev = &e->xmaprequest;
 286
 287         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 288                 return;
 289         if(wa.override_redirect)
 290                 return;
 291         if(!getclient(ev->window))
 292                 manage(ev->window, &wa);
 293 }
 294
 295 static void
 296 propertynotify(XEvent *e) {
 297         Client *c;
 298         Window trans;
 299         XPropertyEvent *ev = &e->xproperty;
 300
 301         if(ev->state == PropertyDelete)
 302                 return; /* ignore */
 303         if((c = getclient(ev->window))) {
 304                 switch (ev->atom) {
 305                         default: break;
 306                         case XA_WM_TRANSIENT_FOR:
 307                                 XGetTransientForHint(dpy, c->win, &trans);
 308                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 309                                         lt->arrange();
 310                                 break;
 311                         case XA_WM_NORMAL_HINTS:
 312                                 updatesizehints(c);
 313                                 break;
 314                 }
 315                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 316                         updatetitle(c);
 317                         if(c == sel)
 318                                 drawstatus();
 319                 }
 320         }
 321 }
 322
 323 static void
 324 unmapnotify(XEvent *e) {
 325         Client *c;
 326         XUnmapEvent *ev = &e->xunmap;
 327
 328         if((c = getclient(ev->window)))
 329                 unmanage(c);
 330 }
 331
 332 /* extern */
 333
 334 void (*handler[LASTEvent]) (XEvent *) = {
 335         [ButtonPress] = buttonpress,
 336         [ConfigureRequest] = configurerequest,
 337         [DestroyNotify] = destroynotify,
 338         [EnterNotify] = enternotify,
 339         [LeaveNotify] = leavenotify,
 340         [Expose] = expose,
 341         [KeyPress] = keypress,
 342         [MappingNotify] = mappingnotify,
 343         [MapRequest] = maprequest,
 344         [PropertyNotify] = propertynotify,
 345         [UnmapNotify] = unmapnotify
 346 };
 347
 348 void
 349 grabkeys(void) {
 350         static unsigned int len = sizeof key / sizeof key[0];
 351         unsigned int i;
 352         KeyCode code;
 353
 354         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 355         for(i = 0; i < len; i++) {
 356                 code = XKeysymToKeycode(dpy, key[i].keysym);
 357                 XGrabKey(dpy, code, key[i].mod, root, True,
 358                                 GrabModeAsync, GrabModeAsync);
 359                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 360                                 GrabModeAsync, GrabModeAsync);
 361                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 362                                 GrabModeAsync, GrabModeAsync);
 363                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 364                                 GrabModeAsync, GrabModeAsync);
 365         }
 366 }