event.c

   1 /* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.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)(Arg *arg);
  15         Arg arg;
  16 } Key;
  17
  18 KEYS
  19
  20 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  21 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  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         c->ismax = False;
  36         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  37         for(;;) {
  38                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
  39                 switch (ev.type) {
  40                 case ButtonRelease:
  41                         resize(c, True, TopLeft);
  42                         XUngrabPointer(dpy, CurrentTime);
  43                         return;
  44                 case Expose:
  45                         handler[Expose](&ev);
  46                         break;
  47                 case MotionNotify:
  48                         XSync(dpy, False);
  49                         c->x = ocx + (ev.xmotion.x - x1);
  50                         c->y = ocy + (ev.xmotion.y - y1);
  51                         resize(c, False, TopLeft);
  52                         break;
  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         c->ismax = False;
  70         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w, c->h);
  71         for(;;) {
  72                 XMaskEvent(dpy, MOUSEMASK | ExposureMask, &ev);
  73                 switch(ev.type) {
  74                 case ButtonRelease:
  75                         resize(c, True, TopLeft);
  76                         XUngrabPointer(dpy, CurrentTime);
  77                         return;
  78                 case Expose:
  79                         handler[Expose](&ev);
  80                         break;
  81                 case MotionNotify:
  82                         XSync(dpy, False);
  83                         if((nw = abs(ocx - ev.xmotion.x)))
  84                                 c->w = nw;
  85                         if((nh = abs(ocy - ev.xmotion.y)))
  86                                 c->h = nh;
  87                         c->x = (ocx <= ev.xmotion.x) ? ocx : ocx - c->w;
  88                         c->y = (ocy <= ev.xmotion.y) ? ocy : ocy - c->h;
  89                         if(ocx <= ev.xmotion.x)
  90                                 sticky = (ocy <= ev.xmotion.y) ? TopLeft : BotLeft;
  91                         else
  92                                 sticky = (ocy <= ev.xmotion.y) ? TopRight : BotRight;
  93                         resize(c, True, sticky);
  94                         break;
  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) && (ev->button == Button1))
 127                         togglemode(NULL);
 128         }
 129         else if((c = getclient(ev->window))) {
 130                 focus(c);
 131                 if(CLEANMASK(ev->state) != MODKEY)
 132                         return;
 133                 if(ev->button == Button1 && (arrange == dofloat || c->isfloat)) {
 134                         restack();
 135                         movemouse(c);
 136                 }
 137                 else if(ev->button == Button2)
 138                         zoom(NULL);
 139                 else if(ev->button == Button3 && (arrange == dofloat || c->isfloat)) {
 140                         restack();
 141                         resizemouse(c);
 142                 }
 143         }
 144 }
 145
 146 static void
 147 configurerequest(XEvent *e) {
 148         unsigned long newmask;
 149         Client *c;
 150         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 151         XWindowChanges wc;
 152
 153         if((c = getclient(ev->window))) {
 154                 c->ismax = False;
 155                 gravitate(c, True);
 156                 if(ev->value_mask & CWX)
 157                         c->x = ev->x;
 158                 if(ev->value_mask & CWY)
 159                         c->y = ev->y;
 160                 if(ev->value_mask & CWWidth)
 161                         c->w = ev->width;
 162                 if(ev->value_mask & CWHeight)
 163                         c->h = ev->height;
 164                 if(ev->value_mask & CWBorderWidth)
 165                         c->border = ev->border_width;
 166                 gravitate(c, False);
 167                 wc.x = c->x;
 168                 wc.y = c->y;
 169                 wc.width = c->w;
 170                 wc.height = c->h;
 171                 newmask = ev->value_mask & (~(CWSibling | CWStackMode | CWBorderWidth));
 172                 if(newmask)
 173                         XConfigureWindow(dpy, c->win, newmask, &wc);
 174                 else
 175                         configure(c);
 176                 XSync(dpy, False);
 177                 if(c->isfloat) {
 178                         resize(c, False, TopLeft);
 179                         if(!isvisible(c))
 180                                 ban(c);
 181                 }
 182                 else
 183                         arrange();
 184         }
 185         else {
 186                 wc.x = ev->x;
 187                 wc.y = ev->y;
 188                 wc.width = ev->width;
 189                 wc.height = ev->height;
 190                 wc.border_width = ev->border_width;
 191                 wc.sibling = ev->above;
 192                 wc.stack_mode = ev->detail;
 193                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 194                 XSync(dpy, False);
 195         }
 196 }
 197
 198 static void
 199 destroynotify(XEvent *e) {
 200         Client *c;
 201         XDestroyWindowEvent *ev = &e->xdestroywindow;
 202
 203         if((c = getclient(ev->window)))
 204                 unmanage(c);
 205 }
 206
 207 static void
 208 enternotify(XEvent *e) {
 209         Client *c;
 210         XCrossingEvent *ev = &e->xcrossing;
 211
 212         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 213                 return;
 214         if(((c = getclient(ev->window)) || (c = getctitle(ev->window))) && isvisible(c))
 215                 focus(c);
 216         else if(ev->window == root) {
 217                 issel = True;
 218                 XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
 219                 drawall();
 220         }
 221 }
 222
 223 static void
 224 expose(XEvent *e) {
 225         Client *c;
 226         XExposeEvent *ev = &e->xexpose;
 227
 228         if(ev->count == 0) {
 229                 if(barwin == ev->window)
 230                         drawstatus();
 231                 else if((c = getctitle(ev->window)))
 232                         drawtitle(c);
 233         }
 234 }
 235
 236 static void
 237 keypress(XEvent *e) {
 238         static unsigned int len = sizeof(key) / sizeof(key[0]);
 239         unsigned int i;
 240         KeySym keysym;
 241         XKeyEvent *ev = &e->xkey;
 242
 243         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 244         for(i = 0; i < len; i++) {
 245                 if(keysym == key[i].keysym
 246                         && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 247                 {
 248                         if(key[i].func)
 249                                 key[i].func(&key[i].arg);
 250                         return;
 251                 }
 252         }
 253 }
 254
 255 static void
 256 leavenotify(XEvent *e) {
 257         XCrossingEvent *ev = &e->xcrossing;
 258
 259         if((ev->window == root) && !ev->same_screen) {
 260                 issel = False;
 261                 drawall();
 262         }
 263 }
 264
 265 static void
 266 mappingnotify(XEvent *e) {
 267         XMappingEvent *ev = &e->xmapping;
 268
 269         XRefreshKeyboardMapping(ev);
 270         if(ev->request == MappingKeyboard)
 271                 grabkeys();
 272 }
 273
 274 static void
 275 maprequest(XEvent *e) {
 276         static XWindowAttributes wa;
 277         XMapRequestEvent *ev = &e->xmaprequest;
 278
 279         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 280                 return;
 281         if(wa.override_redirect) {
 282                 XSelectInput(dpy, ev->window,
 283                                 (StructureNotifyMask | PropertyChangeMask));
 284                 return;
 285         }
 286         if(!getclient(ev->window))
 287                 manage(ev->window, &wa);
 288 }
 289
 290 static void
 291 propertynotify(XEvent *e) {
 292         Client *c;
 293         Window trans;
 294         XPropertyEvent *ev = &e->xproperty;
 295
 296         if(ev->state == PropertyDelete)
 297                 return; /* ignore */
 298         if((c = getclient(ev->window))) {
 299                 if(ev->atom == wmatom[WMProtocols]) {
 300                         c->proto = getproto(c->win);
 301                         return;
 302                 }
 303                 switch (ev->atom) {
 304                         default: break;
 305                         case XA_WM_TRANSIENT_FOR:
 306                                 XGetTransientForHint(dpy, c->win, &trans);
 307                                 if(!c->isfloat && (c->isfloat = (trans != 0)))
 308                                         arrange();
 309                                 break;
 310                         case XA_WM_NORMAL_HINTS:
 311                                 updatesize(c);
 312                                 break;
 313                 }
 314                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 315                         updatetitle(c);
 316                         resizetitle(c);
 317                         drawtitle(c);
 318                 }
 319         }
 320 }
 321
 322 static void
 323 unmapnotify(XEvent *e) {
 324         Client *c;
 325         XUnmapEvent *ev = &e->xunmap;
 326
 327         if((c = getclient(ev->window)))
 328                 unmanage(c);
 329 }
 330
 331 /* extern */
 332
 333 void (*handler[LASTEvent]) (XEvent *) = {
 334         [ButtonPress] = buttonpress,
 335         [ConfigureRequest] = configurerequest,
 336         [DestroyNotify] = destroynotify,
 337         [EnterNotify] = enternotify,
 338         [LeaveNotify] = leavenotify,
 339         [Expose] = expose,
 340         [KeyPress] = keypress,
 341         [MappingNotify] = mappingnotify,
 342         [MapRequest] = maprequest,
 343         [PropertyNotify] = propertynotify,
 344         [UnmapNotify] = unmapnotify
 345 };
 346
 347 void
 348 grabkeys(void) {
 349         static unsigned int len = sizeof(key) / sizeof(key[0]);
 350         unsigned int i;
 351         KeyCode code;
 352
 353         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 354         for(i = 0; i < len; i++) {
 355                 code = XKeysymToKeycode(dpy, key[i].keysym);
 356                 XGrabKey(dpy, code, key[i].mod, root, True,
 357                                 GrabModeAsync, GrabModeAsync);
 358                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 359                                 GrabModeAsync, GrabModeAsync);
 360                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 361                                 GrabModeAsync, GrabModeAsync);
 362                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 363                                 GrabModeAsync, GrabModeAsync);
 364         }
 365 }
 366
 367 void
 368 procevent(void) {
 369         XEvent ev;
 370
 371         while(XPending(dpy)) {
 372                 XNextEvent(dpy, &ev);
 373                 if(handler[ev.type])
 374                         (handler[ev.type])(&ev); /* call handler */
 375         }
 376 }