event.c

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