event.c

   1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <stdio.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)(const char *arg);
  16         const char *arg;
  17 } Key;
  18
  19 KEYS
  20
  21 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  22 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  23
  24 static Client *
  25 getclient(Window w) {
  26         Client *c;
  27
  28         for(c = clients; c && c->win != w; c = c->next);
  29         return c;
  30 }
  31
  32 static void
  33 movemouse(Client *c) {
  34         int x1, y1, ocx, ocy, di, nx, ny;
  35         unsigned int dui;
  36         Window dummy;
  37         XEvent ev;
  38
  39         ocx = nx = c->x;
  40         ocy = ny = c->y;
  41         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  42                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  43                 return;
  44         c->ismax = False;
  45         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  46         for(;;) {
  47                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  48                 switch (ev.type) {
  49                 case ButtonRelease:
  50                         XUngrabPointer(dpy, CurrentTime);
  51                         return;
  52                 case ConfigureRequest:
  53                 case Expose:
  54                 case MapRequest:
  55                         handler[ev.type](&ev);
  56                         break;
  57                 case MotionNotify:
  58                         XSync(dpy, False);
  59                         nx = ocx + (ev.xmotion.x - x1);
  60                         ny = ocy + (ev.xmotion.y - y1);
  61                         if(abs(wax + nx) < SNAP)
  62                                 nx = wax;
  63                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  64                                 nx = wax + waw - c->w - 2 * c->border;
  65                         if(abs(way - ny) < SNAP)
  66                                 ny = way;
  67                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  68                                 ny = way + wah - c->h - 2 * c->border;
  69                         resize(c, nx, ny, c->w, c->h, False);
  70                         break;
  71                 }
  72         }
  73 }
  74
  75 static void
  76 resizemouse(Client *c) {
  77         int ocx, ocy;
  78         int nw, nh;
  79         XEvent ev;
  80
  81         ocx = c->x;
  82         ocy = c->y;
  83         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  84                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  85                 return;
  86         c->ismax = False;
  87         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  88         for(;;) {
  89                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  90                 switch(ev.type) {
  91                 case ButtonRelease:
  92                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  93                                         c->w + c->border - 1, c->h + c->border - 1);
  94                         XUngrabPointer(dpy, CurrentTime);
  95                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  96                         return;
  97                 case ConfigureRequest:
  98                 case Expose:
  99                 case MapRequest:
 100                         handler[ev.type](&ev);
 101                         break;
 102                 case MotionNotify:
 103                         XSync(dpy, False);
 104                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 105                                 nw = 1;
 106                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 107                                 nh = 1;
 108                         resize(c, c->x, c->y, nw, nh, True);
 109                         break;
 110                 }
 111         }
 112 }
 113
 114 static void
 115 buttonpress(XEvent *e) {
 116         static char buf[32];
 117         unsigned int i, x;
 118         Client *c;
 119         XButtonPressedEvent *ev = &e->xbutton;
 120
 121         buf[0] = 0;
 122         if(barwin == ev->window) {
 123                 x = 0;
 124                 for(i = 0; i < ntags; i++) {
 125                         x += textw(tags[i]);
 126                         if(ev->x < x) {
 127                                 snprintf(buf, sizeof buf, "%d", i);
 128                                 if(ev->button == Button1) {
 129                                         if(ev->state & MODKEY)
 130                                                 tag(buf);
 131                                         else
 132                                                 view(buf);
 133                                 }
 134                                 else if(ev->button == Button3) {
 135                                         if(ev->state & MODKEY)
 136                                                 toggletag(buf);
 137                                         else
 138                                                 toggleview(buf);
 139                                 }
 140                                 return;
 141                         }
 142                 }
 143                 if(ev->x < x + blw)
 144                         switch(ev->button) {
 145                         case Button1:
 146                                 setlayout(NULL);
 147                                 break;
 148                         }
 149         }
 150         else if((c = getclient(ev->window))) {
 151                 focus(c);
 152                 if(CLEANMASK(ev->state) != MODKEY)
 153                         return;
 154                 if(ev->button == Button1 && (lt->arrange == untile || c->isuntiled)) {
 155                         restack();
 156                         movemouse(c);
 157                 }
 158                 else if(ev->button == Button2)
 159                         zoom(NULL);
 160                 else if(ev->button == Button3
 161                 && (lt->arrange == untile || c->isuntiled) && !c->isfixed)
 162                 {
 163                         restack();
 164                         resizemouse(c);
 165                 }
 166         }
 167 }
 168
 169 static void
 170 configurerequest(XEvent *e) {
 171         Client *c;
 172         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 173         XWindowChanges wc;
 174
 175         if((c = getclient(ev->window))) {
 176                 c->ismax = False;
 177                 if(ev->value_mask & CWBorderWidth)
 178                         c->border = ev->border_width;
 179                 if(c->isfixed || c->isuntiled || (lt->arrange == untile)) {
 180                         if(ev->value_mask & CWX)
 181                                 c->x = ev->x;
 182                         if(ev->value_mask & CWY)
 183                                 c->y = ev->y;
 184                         if(ev->value_mask & CWWidth)
 185                                 c->w = ev->width;
 186                         if(ev->value_mask & CWHeight)
 187                                 c->h = ev->height;
 188                         if((ev->value_mask & (CWX | CWY))
 189                         && !(ev->value_mask & (CWWidth | CWHeight)))
 190                                 configure(c);
 191                         if(isvisible(c))
 192                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 193                 }
 194                 else
 195                         configure(c);
 196         }
 197         else {
 198                 wc.x = ev->x;
 199                 wc.y = ev->y;
 200                 wc.width = ev->width;
 201                 wc.height = ev->height;
 202                 wc.border_width = ev->border_width;
 203                 wc.sibling = ev->above;
 204                 wc.stack_mode = ev->detail;
 205                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 206         }
 207         XSync(dpy, False);
 208 }
 209
 210 static void
 211 destroynotify(XEvent *e) {
 212         Client *c;
 213         XDestroyWindowEvent *ev = &e->xdestroywindow;
 214
 215         if((c = getclient(ev->window)))
 216                 unmanage(c);
 217 }
 218
 219 static void
 220 enternotify(XEvent *e) {
 221         Client *c;
 222         XCrossingEvent *ev = &e->xcrossing;
 223
 224         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 225                 return;
 226         if((c = getclient(ev->window)) && isvisible(c))
 227                 focus(c);
 228         else if(ev->window == root) {
 229                 selscreen = True;
 230                 for(c = stack; c && !isvisible(c); c = c->snext);
 231                 focus(c);
 232         }
 233 }
 234
 235 static void
 236 expose(XEvent *e) {
 237         XExposeEvent *ev = &e->xexpose;
 238
 239         if(ev->count == 0) {
 240                 if(barwin == ev->window)
 241                         drawstatus();
 242         }
 243 }
 244
 245 static void
 246 keypress(XEvent *e) {
 247         static unsigned int len = sizeof key / sizeof key[0];
 248         unsigned int i;
 249         KeySym keysym;
 250         XKeyEvent *ev = &e->xkey;
 251
 252         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 253         for(i = 0; i < len; i++)
 254                 if(keysym == key[i].keysym
 255                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 256                 {
 257                         if(key[i].func)
 258                                 key[i].func(key[i].arg);
 259                 }
 260 }
 261
 262 static void
 263 leavenotify(XEvent *e) {
 264         XCrossingEvent *ev = &e->xcrossing;
 265
 266         if((ev->window == root) && !ev->same_screen) {
 267                 selscreen = False;
 268                 focus(NULL);
 269         }
 270 }
 271
 272 static void
 273 mappingnotify(XEvent *e) {
 274         XMappingEvent *ev = &e->xmapping;
 275
 276         XRefreshKeyboardMapping(ev);
 277         if(ev->request == MappingKeyboard)
 278                 grabkeys();
 279 }
 280
 281 static void
 282 maprequest(XEvent *e) {
 283         static XWindowAttributes wa;
 284         XMapRequestEvent *ev = &e->xmaprequest;
 285
 286         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 287                 return;
 288         if(wa.override_redirect)
 289                 return;
 290         if(!getclient(ev->window))
 291                 manage(ev->window, &wa);
 292 }
 293
 294 static void
 295 propertynotify(XEvent *e) {
 296         Client *c;
 297         Window trans;
 298         XPropertyEvent *ev = &e->xproperty;
 299
 300         if(ev->state == PropertyDelete)
 301                 return; /* ignore */
 302         if((c = getclient(ev->window))) {
 303                 switch (ev->atom) {
 304                         default: break;
 305                         case XA_WM_TRANSIENT_FOR:
 306                                 XGetTransientForHint(dpy, c->win, &trans);
 307                                 if(!c->isuntiled && (c->isuntiled = (getclient(trans) != NULL)))
 308                                         lt->arrange();
 309                                 break;
 310                         case XA_WM_NORMAL_HINTS:
 311                                 updatesizehints(c);
 312                                 break;
 313                 }
 314                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 315                         updatetitle(c);
 316                         if(c == sel)
 317                                 drawstatus();
 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 }