event.c

   1 /* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
   3  * © 2006-2007 Jukka Salmi <jukka at salmi dot ch>
   4  * © 2007 Premysl Hruby <dfenze at gmail dot com>
   5  * © 2007 Szabolcs Nagy <nszabolcs at gmail dot com>
   6  * See LICENSE file for license details. */
   7 #include "dwm.h"
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <X11/keysym.h>
  11 #include <X11/Xatom.h>
  12
  13 /* static */
  14
  15 typedef struct {
  16         unsigned long mod;
  17         KeySym keysym;
  18         void (*func)(const char *arg);
  19         const char *arg;
  20 } Key;
  21
  22 KEYS
  23
  24 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  25 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  26
  27 static Client *
  28 getclient(Window w) {
  29         Client *c;
  30
  31         for(c = clients; c && c->win != w; c = c->next);
  32         return c;
  33 }
  34
  35 static void
  36 movemouse(Client *c) {
  37         int x1, y1, ocx, ocy, di, nx, ny;
  38         unsigned int dui;
  39         Window dummy;
  40         XEvent ev;
  41
  42         ocx = nx = c->x;
  43         ocy = ny = c->y;
  44         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  45                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  46                 return;
  47         c->ismax = False;
  48         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  49         for(;;) {
  50                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  51                 switch (ev.type) {
  52                 case ButtonRelease:
  53                         XUngrabPointer(dpy, CurrentTime);
  54                         return;
  55                 case ConfigureRequest:
  56                 case Expose:
  57                 case MapRequest:
  58                         handler[ev.type](&ev);
  59                         break;
  60                 case MotionNotify:
  61                         XSync(dpy, False);
  62                         nx = ocx + (ev.xmotion.x - x1);
  63                         ny = ocy + (ev.xmotion.y - y1);
  64                         if(abs(wax + nx) < SNAP)
  65                                 nx = wax;
  66                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  67                                 nx = wax + waw - c->w - 2 * c->border;
  68                         if(abs(way - ny) < SNAP)
  69                                 ny = way;
  70                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  71                                 ny = way + wah - c->h - 2 * c->border;
  72                         resize(c, nx, ny, c->w, c->h, False);
  73                         break;
  74                 }
  75         }
  76 }
  77
  78 static void
  79 resizemouse(Client *c) {
  80         int ocx, ocy;
  81         int nw, nh;
  82         XEvent ev;
  83
  84         ocx = c->x;
  85         ocy = c->y;
  86         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  87                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  88                 return;
  89         c->ismax = False;
  90         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  91         for(;;) {
  92                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  93                 switch(ev.type) {
  94                 case ButtonRelease:
  95                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  96                                         c->w + c->border - 1, c->h + c->border - 1);
  97                         XUngrabPointer(dpy, CurrentTime);
  98                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  99                         return;
 100                 case ConfigureRequest:
 101                 case Expose:
 102                 case MapRequest:
 103                         handler[ev.type](&ev);
 104                         break;
 105                 case MotionNotify:
 106                         XSync(dpy, False);
 107                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 108                                 nw = 1;
 109                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 110                                 nh = 1;
 111                         resize(c, c->x, c->y, nw, nh, True);
 112                         break;
 113                 }
 114         }
 115 }
 116
 117 static void
 118 buttonpress(XEvent *e) {
 119         static char buf[32];
 120         unsigned int i, x;
 121         Client *c;
 122         XButtonPressedEvent *ev = &e->xbutton;
 123
 124         buf[0] = 0;
 125         if(barwin == ev->window) {
 126                 x = 0;
 127                 for(i = 0; i < ntags; i++) {
 128                         x += textw(tags[i]);
 129                         if(ev->x < x) {
 130                                 snprintf(buf, sizeof buf, "%d", i);
 131                                 if(ev->button == Button1) {
 132                                         if(ev->state & MODKEY)
 133                                                 tag(buf);
 134                                         else
 135                                                 view(buf);
 136                                 }
 137                                 else if(ev->button == Button3) {
 138                                         if(ev->state & MODKEY)
 139                                                 toggletag(buf);
 140                                         else
 141                                                 toggleview(buf);
 142                                 }
 143                                 return;
 144                         }
 145                 }
 146                 if(ev->x < x + blw)
 147                         switch(ev->button) {
 148                         case Button1:
 149                                 setlayout(NULL);
 150                                 break;
 151                         }
 152         }
 153         else if((c = getclient(ev->window))) {
 154                 focus(c);
 155                 if(CLEANMASK(ev->state) != MODKEY)
 156                         return;
 157                 if(ev->button == Button1 && (lt->arrange == floating || c->isfloating)) {
 158                         restack();
 159                         movemouse(c);
 160                 }
 161                 else if(ev->button == Button2)
 162                         zoom(NULL);
 163                 else if(ev->button == Button3
 164                 && (lt->arrange == floating || c->isfloating) && !c->isfixed)
 165                 {
 166                         restack();
 167                         resizemouse(c);
 168                 }
 169         }
 170 }
 171
 172 static void
 173 configurerequest(XEvent *e) {
 174         Client *c;
 175         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 176         XWindowChanges wc;
 177
 178         if((c = getclient(ev->window))) {
 179                 c->ismax = False;
 180                 if(ev->value_mask & CWBorderWidth)
 181                         c->border = ev->border_width;
 182                 if(c->isfixed || c->isfloating || (lt->arrange == floating)) {
 183                         if(ev->value_mask & CWX)
 184                                 c->x = ev->x;
 185                         if(ev->value_mask & CWY)
 186                                 c->y = ev->y;
 187                         if(ev->value_mask & CWWidth)
 188                                 c->w = ev->width;
 189                         if(ev->value_mask & CWHeight)
 190                                 c->h = ev->height;
 191                         if((c->x + c->w) > sw && c->isfloating)
 192                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 193                         if((c->y + c->h) > sh && c->isfloating)
 194                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 195                         if((ev->value_mask & (CWX | CWY))
 196                         && !(ev->value_mask & (CWWidth | CWHeight)))
 197                                 configure(c);
 198                         if(isvisible(c))
 199                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 200                 }
 201                 else
 202                         configure(c);
 203         }
 204         else {
 205                 wc.x = ev->x;
 206                 wc.y = ev->y;
 207                 wc.width = ev->width;
 208                 wc.height = ev->height;
 209                 wc.border_width = ev->border_width;
 210                 wc.sibling = ev->above;
 211                 wc.stack_mode = ev->detail;
 212                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 213         }
 214         XSync(dpy, False);
 215 }
 216
 217 static void
 218 configurenotify(XEvent *e) {
 219         XConfigureEvent *ev = &e->xconfigure;
 220
 221         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 222                 sw = ev->width;
 223                 sh = ev->height;
 224                 XFreePixmap(dpy, dc.drawable);
 225                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 226                 XResizeWindow(dpy, barwin, sw, bh);
 227                 updatebarpos();
 228                 lt->arrange();
 229         }
 230 }
 231
 232 static void
 233 destroynotify(XEvent *e) {
 234         Client *c;
 235         XDestroyWindowEvent *ev = &e->xdestroywindow;
 236
 237         if((c = getclient(ev->window)))
 238                 unmanage(c);
 239 }
 240
 241 static void
 242 enternotify(XEvent *e) {
 243         Client *c;
 244         XCrossingEvent *ev = &e->xcrossing;
 245
 246         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 247                 return;
 248         if((c = getclient(ev->window)))
 249                 focus(c);
 250         else if(ev->window == root) {
 251                 selscreen = True;
 252                 focus(NULL);
 253         }
 254 }
 255
 256 static void
 257 expose(XEvent *e) {
 258         XExposeEvent *ev = &e->xexpose;
 259
 260         if(ev->count == 0) {
 261                 if(barwin == ev->window)
 262                         drawstatus();
 263         }
 264 }
 265
 266 static void
 267 keypress(XEvent *e) {
 268         static unsigned int len = sizeof key / sizeof key[0];
 269         unsigned int i;
 270         KeySym keysym;
 271         XKeyEvent *ev = &e->xkey;
 272
 273         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 274         for(i = 0; i < len; i++)
 275                 if(keysym == key[i].keysym
 276                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 277                 {
 278                         if(key[i].func)
 279                                 key[i].func(key[i].arg);
 280                 }
 281 }
 282
 283 static void
 284 leavenotify(XEvent *e) {
 285         XCrossingEvent *ev = &e->xcrossing;
 286
 287         if((ev->window == root) && !ev->same_screen) {
 288                 selscreen = False;
 289                 focus(NULL);
 290         }
 291 }
 292
 293 static void
 294 mappingnotify(XEvent *e) {
 295         XMappingEvent *ev = &e->xmapping;
 296
 297         XRefreshKeyboardMapping(ev);
 298         if(ev->request == MappingKeyboard)
 299                 grabkeys();
 300 }
 301
 302 static void
 303 maprequest(XEvent *e) {
 304         static XWindowAttributes wa;
 305         XMapRequestEvent *ev = &e->xmaprequest;
 306
 307         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 308                 return;
 309         if(wa.override_redirect)
 310                 return;
 311         if(!getclient(ev->window))
 312                 manage(ev->window, &wa);
 313 }
 314
 315 static void
 316 propertynotify(XEvent *e) {
 317         Client *c;
 318         Window trans;
 319         XPropertyEvent *ev = &e->xproperty;
 320
 321         if(ev->state == PropertyDelete)
 322                 return; /* ignore */
 323         if((c = getclient(ev->window))) {
 324                 switch (ev->atom) {
 325                         default: break;
 326                         case XA_WM_TRANSIENT_FOR:
 327                                 XGetTransientForHint(dpy, c->win, &trans);
 328                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 329                                         lt->arrange();
 330                                 break;
 331                         case XA_WM_NORMAL_HINTS:
 332                                 updatesizehints(c);
 333                                 break;
 334                 }
 335                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 336                         updatetitle(c);
 337                         if(c == sel)
 338                                 drawstatus();
 339                 }
 340         }
 341 }
 342
 343 static void
 344 unmapnotify(XEvent *e) {
 345         Client *c;
 346         XUnmapEvent *ev = &e->xunmap;
 347
 348         if((c = getclient(ev->window)))
 349                 unmanage(c);
 350 }
 351
 352 /* extern */
 353
 354 void (*handler[LASTEvent]) (XEvent *) = {
 355         [ButtonPress] = buttonpress,
 356         [ConfigureRequest] = configurerequest,
 357         [ConfigureNotify] = configurenotify,
 358         [DestroyNotify] = destroynotify,
 359         [EnterNotify] = enternotify,
 360         [LeaveNotify] = leavenotify,
 361         [Expose] = expose,
 362         [KeyPress] = keypress,
 363         [MappingNotify] = mappingnotify,
 364         [MapRequest] = maprequest,
 365         [PropertyNotify] = propertynotify,
 366         [UnmapNotify] = unmapnotify
 367 };
 368
 369 void
 370 grabkeys(void) {
 371         static unsigned int len = sizeof key / sizeof key[0];
 372         unsigned int i;
 373         KeyCode code;
 374
 375         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 376         for(i = 0; i < len; i++) {
 377                 code = XKeysymToKeycode(dpy, key[i].keysym);
 378                 XGrabKey(dpy, code, key[i].mod, root, True,
 379                                 GrabModeAsync, GrabModeAsync);
 380                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 381                                 GrabModeAsync, GrabModeAsync);
 382                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 383                                 GrabModeAsync, GrabModeAsync);
 384                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 385                                 GrabModeAsync, GrabModeAsync);
 386         }
 387 }