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 #include <X11/Xutil.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) && ev->button == Button1)
 143                         setlayout(NULL);
 144         }
 145         else if((c = getclient(ev->window))) {
 146                 focus(c);
 147                 if(CLEANMASK(ev->state) != MODKEY)
 148                         return;
 149                 if(ev->button == Button1 && (isfloating() || c->isfloating)) {
 150                         restack();
 151                         movemouse(c);
 152                 }
 153                 else if(ev->button == Button2)
 154                         zoom(NULL);
 155                 else if(ev->button == Button3
 156                 && (isfloating() || c->isfloating) && !c->isfixed)
 157                 {
 158                         restack();
 159                         resizemouse(c);
 160                 }
 161         }
 162 }
 163
 164 static void
 165 configurerequest(XEvent *e) {
 166         Client *c;
 167         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 168         XWindowChanges wc;
 169
 170         if((c = getclient(ev->window))) {
 171                 c->ismax = False;
 172                 if(ev->value_mask & CWBorderWidth)
 173                         c->border = ev->border_width;
 174                 if(c->isfixed || c->isfloating || isfloating()) {
 175                         if(ev->value_mask & CWX)
 176                                 c->x = ev->x;
 177                         if(ev->value_mask & CWY)
 178                                 c->y = ev->y;
 179                         if(ev->value_mask & CWWidth)
 180                                 c->w = ev->width;
 181                         if(ev->value_mask & CWHeight)
 182                                 c->h = ev->height;
 183                         if((c->x + c->w) > sw && c->isfloating)
 184                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 185                         if((c->y + c->h) > sh && c->isfloating)
 186                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 187                         if((ev->value_mask & (CWX | CWY))
 188                         && !(ev->value_mask & (CWWidth | CWHeight)))
 189                                 configure(c);
 190                         if(isvisible(c))
 191                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 192                 }
 193                 else
 194                         configure(c);
 195         }
 196         else {
 197                 wc.x = ev->x;
 198                 wc.y = ev->y;
 199                 wc.width = ev->width;
 200                 wc.height = ev->height;
 201                 wc.border_width = ev->border_width;
 202                 wc.sibling = ev->above;
 203                 wc.stack_mode = ev->detail;
 204                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 205         }
 206         XSync(dpy, False);
 207 }
 208
 209 static void
 210 configurenotify(XEvent *e) {
 211         XConfigureEvent *ev = &e->xconfigure;
 212
 213         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 214                 sw = ev->width;
 215                 sh = ev->height;
 216                 XFreePixmap(dpy, dc.drawable);
 217                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 218                 XResizeWindow(dpy, barwin, sw, bh);
 219                 updatebarpos();
 220                 arrange();
 221         }
 222 }
 223
 224 static void
 225 destroynotify(XEvent *e) {
 226         Client *c;
 227         XDestroyWindowEvent *ev = &e->xdestroywindow;
 228
 229         if((c = getclient(ev->window)))
 230                 unmanage(c, WithdrawnState);
 231 }
 232
 233 static void
 234 enternotify(XEvent *e) {
 235         Client *c;
 236         XCrossingEvent *ev = &e->xcrossing;
 237
 238         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 239                 return;
 240         if((c = getclient(ev->window)))
 241                 focus(c);
 242         else if(ev->window == root) {
 243                 selscreen = True;
 244                 focus(NULL);
 245         }
 246 }
 247
 248 static void
 249 expose(XEvent *e) {
 250         XExposeEvent *ev = &e->xexpose;
 251
 252         if(ev->count == 0) {
 253                 if(barwin == ev->window)
 254                         drawstatus();
 255         }
 256 }
 257
 258 static void
 259 keypress(XEvent *e) {
 260         static unsigned int len = sizeof key / sizeof key[0];
 261         unsigned int i;
 262         KeySym keysym;
 263         XKeyEvent *ev = &e->xkey;
 264
 265         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 266         for(i = 0; i < len; i++)
 267                 if(keysym == key[i].keysym
 268                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 269                 {
 270                         if(key[i].func)
 271                                 key[i].func(key[i].arg);
 272                 }
 273 }
 274
 275 static void
 276 leavenotify(XEvent *e) {
 277         XCrossingEvent *ev = &e->xcrossing;
 278
 279         if((ev->window == root) && !ev->same_screen) {
 280                 selscreen = False;
 281                 focus(NULL);
 282         }
 283 }
 284
 285 static void
 286 mappingnotify(XEvent *e) {
 287         XMappingEvent *ev = &e->xmapping;
 288
 289         XRefreshKeyboardMapping(ev);
 290         if(ev->request == MappingKeyboard)
 291                 grabkeys();
 292 }
 293
 294 static void
 295 maprequest(XEvent *e) {
 296         static XWindowAttributes wa;
 297         XMapRequestEvent *ev = &e->xmaprequest;
 298
 299         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 300                 return;
 301         if(wa.override_redirect)
 302                 return;
 303         if(!getclient(ev->window))
 304                 manage(ev->window, &wa);
 305 }
 306
 307 static void
 308 propertynotify(XEvent *e) {
 309         Client *c;
 310         Window trans;
 311         XPropertyEvent *ev = &e->xproperty;
 312
 313         if(ev->state == PropertyDelete)
 314                 return; /* ignore */
 315         if((c = getclient(ev->window))) {
 316                 switch (ev->atom) {
 317                         default: break;
 318                         case XA_WM_TRANSIENT_FOR:
 319                                 XGetTransientForHint(dpy, c->win, &trans);
 320                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 321                                         arrange();
 322                                 break;
 323                         case XA_WM_NORMAL_HINTS:
 324                                 updatesizehints(c);
 325                                 break;
 326                 }
 327                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 328                         updatetitle(c);
 329                         if(c == sel)
 330                                 drawstatus();
 331                 }
 332         }
 333 }
 334
 335 static void
 336 unmapnotify(XEvent *e) {
 337         Client *c;
 338         XUnmapEvent *ev = &e->xunmap;
 339
 340         if((c = getclient(ev->window)) && (ev->event == root)) {
 341                 if(ev->send_event || c->unmapped-- == 0)
 342                         unmanage(c, WithdrawnState);
 343         }
 344 }
 345
 346 /* extern */
 347
 348 void (*handler[LASTEvent]) (XEvent *) = {
 349         [ButtonPress] = buttonpress,
 350         [ConfigureRequest] = configurerequest,
 351         [ConfigureNotify] = configurenotify,
 352         [DestroyNotify] = destroynotify,
 353         [EnterNotify] = enternotify,
 354         [LeaveNotify] = leavenotify,
 355         [Expose] = expose,
 356         [KeyPress] = keypress,
 357         [MappingNotify] = mappingnotify,
 358         [MapRequest] = maprequest,
 359         [PropertyNotify] = propertynotify,
 360         [UnmapNotify] = unmapnotify
 361 };
 362
 363 void
 364 grabkeys(void) {
 365         static unsigned int len = sizeof key / sizeof key[0];
 366         unsigned int i;
 367         KeyCode code;
 368
 369         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 370         for(i = 0; i < len; i++) {
 371                 code = XKeysymToKeycode(dpy, key[i].keysym);
 372                 XGrabKey(dpy, code, key[i].mod, root, True,
 373                                 GrabModeAsync, GrabModeAsync);
 374                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 375                                 GrabModeAsync, GrabModeAsync);
 376                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 377                                 GrabModeAsync, GrabModeAsync);
 378                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 379                                 GrabModeAsync, GrabModeAsync);
 380         }
 381 }