event.c

   1 /* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
   3  * See LICENSE file for license details. */
   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 == floating || c->isfloating)) {
 155                         restack();
 156                         movemouse(c);
 157                 }
 158                 else if(ev->button == Button2)
 159                         zoom(NULL);
 160                 else if(ev->button == Button3
 161                 && (lt->arrange == floating || c->isfloating) && !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->isfloating || (lt->arrange == floating)) {
 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((c->x + c->w) > sw && c->isfloating)
 189                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 190                         if((c->y + c->h) > sh && c->isfloating)
 191                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 192                         if((ev->value_mask & (CWX | CWY))
 193                         && !(ev->value_mask & (CWWidth | CWHeight)))
 194                                 configure(c);
 195                         if(isvisible(c))
 196                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 197                 }
 198                 else
 199                         configure(c);
 200         }
 201         else {
 202                 wc.x = ev->x;
 203                 wc.y = ev->y;
 204                 wc.width = ev->width;
 205                 wc.height = ev->height;
 206                 wc.border_width = ev->border_width;
 207                 wc.sibling = ev->above;
 208                 wc.stack_mode = ev->detail;
 209                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 210         }
 211         XSync(dpy, False);
 212 }
 213
 214 static void
 215 configurenotify(XEvent *e) {
 216         XConfigureEvent *ev = &e->xconfigure;
 217
 218         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 219                 sw = ev->width;
 220                 sh = ev->height;
 221                 wah = sh - bh;
 222                 waw = sw;
 223                 XFreePixmap(dpy, dc.drawable);
 224                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 225                 XResizeWindow(dpy, barwin, sw, bh);
 226                 lt->arrange();
 227         }
 228 }
 229
 230 static void
 231 destroynotify(XEvent *e) {
 232         Client *c;
 233         XDestroyWindowEvent *ev = &e->xdestroywindow;
 234
 235         if((c = getclient(ev->window)))
 236                 unmanage(c);
 237 }
 238
 239 static void
 240 enternotify(XEvent *e) {
 241         Client *c;
 242         XCrossingEvent *ev = &e->xcrossing;
 243
 244         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 245                 return;
 246         if((c = getclient(ev->window)) && isvisible(c))
 247                 focus(c);
 248         else if(ev->window == root) {
 249                 selscreen = True;
 250                 for(c = stack; c && !isvisible(c); c = c->snext);
 251                 focus(c);
 252         }
 253 }
 254
 255 static void
 256 expose(XEvent *e) {
 257         XExposeEvent *ev = &e->xexpose;
 258
 259         if(ev->count == 0) {
 260                 if(barwin == ev->window)
 261                         drawstatus();
 262         }
 263 }
 264
 265 static void
 266 keypress(XEvent *e) {
 267         static unsigned int len = sizeof key / sizeof key[0];
 268         unsigned int i;
 269         KeySym keysym;
 270         XKeyEvent *ev = &e->xkey;
 271
 272         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 273         for(i = 0; i < len; i++)
 274                 if(keysym == key[i].keysym
 275                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 276                 {
 277                         if(key[i].func)
 278                                 key[i].func(key[i].arg);
 279                 }
 280 }
 281
 282 static void
 283 leavenotify(XEvent *e) {
 284         XCrossingEvent *ev = &e->xcrossing;
 285
 286         if((ev->window == root) && !ev->same_screen) {
 287                 selscreen = False;
 288                 focus(NULL);
 289         }
 290 }
 291
 292 static void
 293 mappingnotify(XEvent *e) {
 294         XMappingEvent *ev = &e->xmapping;
 295
 296         XRefreshKeyboardMapping(ev);
 297         if(ev->request == MappingKeyboard)
 298                 grabkeys();
 299 }
 300
 301 static void
 302 maprequest(XEvent *e) {
 303         static XWindowAttributes wa;
 304         XMapRequestEvent *ev = &e->xmaprequest;
 305
 306         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 307                 return;
 308         if(wa.override_redirect)
 309                 return;
 310         if(!getclient(ev->window))
 311                 manage(ev->window, &wa);
 312 }
 313
 314 static void
 315 propertynotify(XEvent *e) {
 316         Client *c;
 317         Window trans;
 318         XPropertyEvent *ev = &e->xproperty;
 319
 320         if(ev->state == PropertyDelete)
 321                 return; /* ignore */
 322         if((c = getclient(ev->window))) {
 323                 switch (ev->atom) {
 324                         default: break;
 325                         case XA_WM_TRANSIENT_FOR:
 326                                 XGetTransientForHint(dpy, c->win, &trans);
 327                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 328                                         lt->arrange();
 329                                 break;
 330                         case XA_WM_NORMAL_HINTS:
 331                                 updatesizehints(c);
 332                                 break;
 333                 }
 334                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 335                         updatetitle(c);
 336                         if(c == sel)
 337                                 drawstatus();
 338                 }
 339         }
 340 }
 341
 342 static void
 343 unmapnotify(XEvent *e) {
 344         Client *c;
 345         XUnmapEvent *ev = &e->xunmap;
 346
 347         if((c = getclient(ev->window)))
 348                 unmanage(c);
 349 }
 350
 351 /* extern */
 352
 353 void (*handler[LASTEvent]) (XEvent *) = {
 354         [ButtonPress] = buttonpress,
 355         [ConfigureRequest] = configurerequest,
 356         [ConfigureNotify] = configurenotify,
 357         [DestroyNotify] = destroynotify,
 358         [EnterNotify] = enternotify,
 359         [LeaveNotify] = leavenotify,
 360         [Expose] = expose,
 361         [KeyPress] = keypress,
 362         [MappingNotify] = mappingnotify,
 363         [MapRequest] = maprequest,
 364         [PropertyNotify] = propertynotify,
 365         [UnmapNotify] = unmapnotify
 366 };
 367
 368 void
 369 grabkeys(void) {
 370         static unsigned int len = sizeof key / sizeof key[0];
 371         unsigned int i;
 372         KeyCode code;
 373
 374         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 375         for(i = 0; i < len; i++) {
 376                 code = XKeysymToKeycode(dpy, key[i].keysym);
 377                 XGrabKey(dpy, code, key[i].mod, root, True,
 378                                 GrabModeAsync, GrabModeAsync);
 379                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 380                                 GrabModeAsync, GrabModeAsync);
 381                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 382                                 GrabModeAsync, GrabModeAsync);
 383                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 384                                 GrabModeAsync, GrabModeAsync);
 385         }
 386 }