event.c

   1 /*
   2  * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dwm.h"
   6 #include <stdlib.h>
   7 #include <X11/keysym.h>
   8 #include <X11/Xatom.h>
   9
  10 /* static */
  11
  12 typedef struct {
  13         unsigned long mod;
  14         KeySym keysym;
  15         void (*func)(Arg *arg);
  16         Arg arg;
  17 } Key;
  18
  19 KEYS
  20
  21 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  22
  23 static void
  24 movemouse(Client *c) {
  25         int x1, y1, ocx, ocy, di;
  26         unsigned int dui;
  27         Window dummy;
  28         XEvent ev;
  29
  30         ocx = c->x;
  31         ocy = c->y;
  32         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  33                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  34                 return;
  35         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  36         for(;;) {
  37                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
  38                 switch (ev.type) {
  39                 default:
  40                         break;
  41                 case Expose:
  42                         handler[Expose](&ev);
  43                         break;
  44                 case MotionNotify:
  45                         XSync(dpy, False);
  46                         c->x = ocx + (ev.xmotion.x - x1);
  47                         c->y = ocy + (ev.xmotion.y - y1);
  48                         resize(c, False, TopLeft);
  49                         break;
  50                 case ButtonRelease:
  51                         XUngrabPointer(dpy, CurrentTime);
  52                         return;
  53                 }
  54         }
  55 }
  56
  57 static void
  58 resizemouse(Client *c) {
  59         int ocx, ocy;
  60         int nw, nh;
  61         Corner sticky;
  62         XEvent ev;
  63
  64         ocx = c->x;
  65         ocy = c->y;
  66         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  67                                 None, cursor[CurResize], CurrentTime) != GrabSuccess)
  68                 return;
  69         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
  70         for(;;) {
  71                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
  72                 switch(ev.type) {
  73                 default:
  74                         break;
  75                 case Expose:
  76                         handler[Expose](&ev);
  77                         break;
  78                 case MotionNotify:
  79                         XSync(dpy, False);
  80                         if((nw = abs(ocx - ev.xmotion.x)))
  81                                 c->w = abs(ocx - ev.xmotion.x);
  82                         if((nh = abs(ocy - ev.xmotion.y)))
  83                                 c->h = abs(ocy - ev.xmotion.y);
  84                         c->x = (ocx <= ev.xmotion.x) ? ocx : ocx - c->w;
  85                         c->y = (ocy <= ev.xmotion.y) ? ocy : ocy - c->h;
  86                         if(ocx <= ev.xmotion.x)
  87                                 sticky = (ocy <= ev.xmotion.y) ? TopLeft : BotLeft;
  88                         else
  89                                 sticky = (ocy <= ev.xmotion.y) ? TopRight : BotRight;
  90                         resize(c, True, sticky);
  91                         break;
  92                 case ButtonRelease:
  93                         XUngrabPointer(dpy, CurrentTime);
  94                         return;
  95                 }
  96         }
  97 }
  98
  99 static void
 100 buttonpress(XEvent *e) {
 101         int x;
 102         Arg a;
 103         Client *c;
 104         XButtonPressedEvent *ev = &e->xbutton;
 105
 106         if(barwin == ev->window) {
 107                 x = 0;
 108                 for(a.i = 0; a.i < ntags; a.i++) {
 109                         x += textw(tags[a.i]);
 110                         if(ev->x < x) {
 111                                 if(ev->button == Button1) {
 112                                         if(ev->state & MODKEY)
 113                                                 tag(&a);
 114                                         else
 115                                                 view(&a);
 116                                 }
 117                                 else if(ev->button == Button3) {
 118                                         if(ev->state & MODKEY)
 119                                                 toggletag(&a);
 120                                         else
 121                                                 toggleview(&a);
 122                                 }
 123                                 return;
 124                         }
 125                 }
 126                 if(ev->x < x + bmw) {
 127                         if(ev->button == Button1)
 128                                 togglemode(NULL);
 129                 }
 130         }
 131         else if((c = getclient(ev->window))) {
 132                 focus(c);
 133                 if(maximized || CLEANMASK(ev->state) != MODKEY)
 134                         return;
 135                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 136                         restack(c);
 137                         movemouse(c);
 138                 }
 139                 else if(ev->button == Button2)
 140                         zoom(NULL);
 141                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {
 142                         restack(c);
 143                         resizemouse(c);
 144                 }
 145         }
 146 }
 147
 148 static void
 149 synconfig(Client *c, int x, int y, int w, int h, unsigned int border) {
 150         XEvent synev;
 151
 152         synev.type = ConfigureNotify;
 153         synev.xconfigure.display = dpy;
 154         synev.xconfigure.event = c->win;
 155         synev.xconfigure.window = c->win;
 156         synev.xconfigure.x = x;
 157         synev.xconfigure.y = y;
 158         synev.xconfigure.width = w;
 159         synev.xconfigure.height = h;
 160         synev.xconfigure.border_width = border;
 161         synev.xconfigure.above = None;
 162         XSendEvent(dpy, c->win, True, NoEventMask, &synev);
 163 }
 164
 165 static void
 166 configurerequest(XEvent *e) {
 167         unsigned long newmask;
 168         Client *c;
 169         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 170         XWindowChanges wc;
 171
 172         if((c = getclient(ev->window))) {
 173                 if((c == sel) && !c->isfloat && (arrange != dofloat) && maximized) {
 174                         synconfig(c, sx, sy + bh, sw - 2, sh - 2 - bh, ev->border_width);
 175                         XSync(dpy, False);
 176                         return;
 177                 }
 178                 gravitate(c, True);
 179                 if(ev->value_mask & CWX)
 180                         c->x = ev->x;
 181                 if(ev->value_mask & CWY)
 182                         c->y = ev->y;
 183                 if(ev->value_mask & CWWidth)
 184                         c->w = ev->width;
 185                 if(ev->value_mask & CWHeight)
 186                         c->h = ev->height;
 187                 if(ev->value_mask & CWBorderWidth)
 188                         c->border = ev->border_width;
 189                 gravitate(c, False);
 190                 wc.x = c->x;
 191                 wc.y = c->y;
 192                 wc.width = c->w;
 193                 wc.height = c->h;
 194                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 195                 if(newmask)
 196                         XConfigureWindow(dpy, c->win, newmask, &wc);
 197                 else
 198                         synconfig(c, c->x, c->y, c->w, c->h, c->border);
 199                 XSync(dpy, False);
 200                 if(c->isfloat)
 201                         resize(c, False, TopLeft);
 202                 else
 203                         arrange(NULL);
 204         }
 205         else {
 206                 wc.x = ev->x;
 207                 wc.y = ev->y;
 208                 wc.width = ev->width;
 209                 wc.height = ev->height;
 210                 wc.border_width = ev->border_width;
 211                 wc.sibling = ev->above;
 212                 wc.stack_mode = ev->detail;
 213                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 214                 XSync(dpy, False);
 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
 235         if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))
 236                 focus(c);
 237         else if(ev->window == root) {
 238                 issel = True;
 239                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 240                 drawall();
 241         }
 242 }
 243
 244 static void
 245 expose(XEvent *e) {
 246         Client *c;
 247         XExposeEvent *ev = &e->xexpose;
 248
 249         if(ev->count == 0) {
 250                 if(barwin == ev->window)
 251                         drawstatus();
 252                 else if((c = getctitle(ev->window)))
 253                         drawtitle(c);
 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                         return;
 272                 }
 273         }
 274 }
 275
 276 static void
 277 leavenotify(XEvent *e) {
 278         XCrossingEvent *ev = &e->xcrossing;
 279
 280         if((ev->window == root) && !ev->same_screen) {
 281                 issel = False;
 282                 drawall();
 283         }
 284 }
 285
 286 static void
 287 mappingnotify(XEvent *e) {
 288         XMappingEvent *ev = &e->xmapping;
 289
 290         XRefreshKeyboardMapping(ev);
 291         if(ev->request == MappingKeyboard)
 292                 grabkeys();
 293 }
 294
 295 static void
 296 maprequest(XEvent *e) {
 297         static XWindowAttributes wa;
 298         XMapRequestEvent *ev = &e->xmaprequest;
 299
 300         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 301                 return;
 302
 303         if(wa.override_redirect) {
 304                 XSelectInput(dpy, ev->window,
 305                                 (StructureNotifyMask | PropertyChangeMask));
 306                 return;
 307         }
 308
 309         if(!getclient(ev->window))
 310                 manage(ev->window, &wa);
 311 }
 312
 313 static void
 314 propertynotify(XEvent *e) {
 315         Client *c;
 316         Window trans;
 317         XPropertyEvent *ev = &e->xproperty;
 318
 319         if(ev->state == PropertyDelete)
 320                 return; /* ignore */
 321
 322         if((c = getclient(ev->window))) {
 323                 if(ev->atom == wmatom[WMProtocols]) {
 324                         c->proto = getproto(c->win);
 325                         return;
 326                 }
 327                 switch (ev->atom) {
 328                         default: break;
 329                         case XA_WM_TRANSIENT_FOR:
 330                                 XGetTransientForHint(dpy, c->win, &trans);
 331                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 332                                         arrange(NULL);
 333                                 break;
 334                         case XA_WM_NORMAL_HINTS:
 335                                 updatesize(c);
 336                                 break;
 337                 }
 338                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 339                         updatetitle(c);
 340                         drawtitle(c);
 341                 }
 342         }
 343 }
 344
 345 static void
 346 unmapnotify(XEvent *e) {
 347         Client *c;
 348         XUnmapEvent *ev = &e->xunmap;
 349
 350         if((c = getclient(ev->window)))
 351                 unmanage(c);
 352 }
 353
 354 /* extern */
 355
 356 void (*handler[LASTEvent]) (XEvent *) = {
 357         [ButtonPress] = buttonpress,
 358         [ConfigureRequest] = configurerequest,
 359         [DestroyNotify] = destroynotify,
 360         [EnterNotify] = enternotify,
 361         [LeaveNotify] = leavenotify,
 362         [Expose] = expose,
 363         [KeyPress] = keypress,
 364         [MappingNotify] = mappingnotify,
 365         [MapRequest] = maprequest,
 366         [PropertyNotify] = propertynotify,
 367         [UnmapNotify] = unmapnotify
 368 };
 369
 370 void
 371 grabkeys() {
 372         static unsigned int len = sizeof(key) / sizeof(key[0]);
 373         unsigned int i;
 374         KeyCode code;
 375
 376         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 377         for(i = 0; i < len; i++) {
 378                 code = XKeysymToKeycode(dpy, key[i].keysym);
 379                 XGrabKey(dpy, code, key[i].mod, root, True,
 380                                 GrabModeAsync, GrabModeAsync);
 381                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 382                                 GrabModeAsync, GrabModeAsync);
 383                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 384                                 GrabModeAsync, GrabModeAsync);
 385                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 386                                 GrabModeAsync, GrabModeAsync);
 387         }
 388 }
 389
 390 void
 391 procevent() {
 392         XEvent ev;
 393
 394         while(XPending(dpy)) {
 395                 XNextEvent(dpy, &ev);
 396                 if(handler[ev.type])
 397                         (handler[ev.type])(&ev); /* call handler */
 398         }
 399 }