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  * © 2007 Premysl Hruby <dfenze at gmail dot com>
   4  * See LICENSE file for license details. */
   5 #include "dwm.h"
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <X11/keysym.h>
   9 #include <X11/Xatom.h>
  10
  11 /* static */
  12
  13 typedef struct {
  14         unsigned long mod;
  15         KeySym keysym;
  16         void (*func)(const char *arg);
  17         const char *arg;
  18 } Key;
  19
  20 KEYS
  21
  22 #define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
  23 #define MOUSEMASK               (BUTTONMASK | PointerMotionMask)
  24
  25 static Client *
  26 getclient(Window w) {
  27         Client *c;
  28
  29         for(c = clients; c && c->win != w; c = c->next);
  30         return c;
  31 }
  32
  33 static void
  34 movemouse(Client *c) {
  35         int x1, y1, ocx, ocy, di, nx, ny;
  36         unsigned int dui;
  37         Window dummy;
  38         XEvent ev;
  39
  40         ocx = nx = c->x;
  41         ocy = ny = c->y;
  42         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  43                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  44                 return;
  45         c->ismax = False;
  46         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  47         for(;;) {
  48                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  49                 switch (ev.type) {
  50                 case ButtonRelease:
  51                         XUngrabPointer(dpy, CurrentTime);
  52                         return;
  53                 case ConfigureRequest:
  54                 case Expose:
  55                 case MapRequest:
  56                         handler[ev.type](&ev);
  57                         break;
  58                 case MotionNotify:
  59                         XSync(dpy, False);
  60                         nx = ocx + (ev.xmotion.x - x1);
  61                         ny = ocy + (ev.xmotion.y - y1);
  62                         if(abs(wax + nx) < SNAP)
  63                                 nx = wax;
  64                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  65                                 nx = wax + waw - c->w - 2 * c->border;
  66                         if(abs(way - ny) < SNAP)
  67                                 ny = way;
  68                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  69                                 ny = way + wah - c->h - 2 * c->border;
  70                         resize(c, nx, ny, c->w, c->h, False);
  71                         break;
  72                 }
  73         }
  74 }
  75
  76 static void
  77 resizemouse(Client *c) {
  78         int ocx, ocy;
  79         int nw, nh;
  80         XEvent ev;
  81
  82         ocx = c->x;
  83         ocy = c->y;
  84         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  85                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  86                 return;
  87         c->ismax = False;
  88         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  89         for(;;) {
  90                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  91                 switch(ev.type) {
  92                 case ButtonRelease:
  93                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  94                                         c->w + c->border - 1, c->h + c->border - 1);
  95                         XUngrabPointer(dpy, CurrentTime);
  96                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  97                         return;
  98                 case ConfigureRequest:
  99                 case Expose:
 100                 case MapRequest:
 101                         handler[ev.type](&ev);
 102                         break;
 103                 case MotionNotify:
 104                         XSync(dpy, False);
 105                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 106                                 nw = 1;
 107                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 108                                 nh = 1;
 109                         resize(c, c->x, c->y, nw, nh, True);
 110                         break;
 111                 }
 112         }
 113 }
 114
 115 static void
 116 buttonpress(XEvent *e) {
 117         static char buf[32];
 118         unsigned int i, x;
 119         Client *c;
 120         XButtonPressedEvent *ev = &e->xbutton;
 121
 122         buf[0] = 0;
 123         if(barwin == ev->window) {
 124                 x = 0;
 125                 for(i = 0; i < ntags; i++) {
 126                         x += textw(tags[i]);
 127                         if(ev->x < x) {
 128                                 snprintf(buf, sizeof buf, "%d", i);
 129                                 if(ev->button == Button1) {
 130                                         if(ev->state & MODKEY)
 131                                                 tag(buf);
 132                                         else
 133                                                 view(buf);
 134                                 }
 135                                 else if(ev->button == Button3) {
 136                                         if(ev->state & MODKEY)
 137                                                 toggletag(buf);
 138                                         else
 139                                                 toggleview(buf);
 140                                 }
 141                                 return;
 142                         }
 143                 }
 144                 if(ev->x < x + blw)
 145                         switch(ev->button) {
 146                         case Button1:
 147                                 setlayout(NULL);
 148                                 break;
 149                         }
 150         }
 151         else if((c = getclient(ev->window))) {
 152                 focus(c);
 153                 if(CLEANMASK(ev->state) != MODKEY)
 154                         return;
 155                 if(ev->button == Button1 && (lt->arrange == floating || c->isfloating)) {
 156                         restack();
 157                         movemouse(c);
 158                 }
 159                 else if(ev->button == Button2)
 160                         zoom(NULL);
 161                 else if(ev->button == Button3
 162                 && (lt->arrange == floating || c->isfloating) && !c->isfixed)
 163                 {
 164                         restack();
 165                         resizemouse(c);
 166                 }
 167         }
 168 }
 169
 170 static void
 171 configurerequest(XEvent *e) {
 172         Client *c;
 173         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 174         XWindowChanges wc;
 175
 176         if((c = getclient(ev->window))) {
 177                 c->ismax = False;
 178                 if(ev->value_mask & CWBorderWidth)
 179                         c->border = ev->border_width;
 180                 if(c->isfixed || c->isfloating || (lt->arrange == floating)) {
 181                         if(ev->value_mask & CWX)
 182                                 c->x = ev->x;
 183                         if(ev->value_mask & CWY)
 184                                 c->y = ev->y;
 185                         if(ev->value_mask & CWWidth)
 186                                 c->w = ev->width;
 187                         if(ev->value_mask & CWHeight)
 188                                 c->h = ev->height;
 189                         if((c->x + c->w) > sw && c->isfloating)
 190                                 c->x = sw / 2 - c->w / 2; /* center in x direction */
 191                         if((c->y + c->h) > sh && c->isfloating)
 192                                 c->y = sh / 2 - c->h / 2; /* center in y direction */
 193                         if((ev->value_mask & (CWX | CWY))
 194                         && !(ev->value_mask & (CWWidth | CWHeight)))
 195                                 configure(c);
 196                         if(isvisible(c))
 197                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 198                 }
 199                 else
 200                         configure(c);
 201         }
 202         else {
 203                 wc.x = ev->x;
 204                 wc.y = ev->y;
 205                 wc.width = ev->width;
 206                 wc.height = ev->height;
 207                 wc.border_width = ev->border_width;
 208                 wc.sibling = ev->above;
 209                 wc.stack_mode = ev->detail;
 210                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 211         }
 212         XSync(dpy, False);
 213 }
 214
 215 static void
 216 configurenotify(XEvent *e) {
 217         XConfigureEvent *ev = &e->xconfigure;
 218
 219         if (ev->window == root && (ev->width != sw || ev->height != sh)) {
 220                 sw = ev->width;
 221                 sh = ev->height;
 222                 XFreePixmap(dpy, dc.drawable);
 223                 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 224                 XResizeWindow(dpy, barwin, sw, bh);
 225                 updatebarpos();
 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))
 247                 focus(c);
 248         else if(ev->window == root) {
 249                 selscreen = True;
 250                 focus(NULL);
 251         }
 252 }
 253
 254 static void
 255 expose(XEvent *e) {
 256         XExposeEvent *ev = &e->xexpose;
 257
 258         if(ev->count == 0) {
 259                 if(barwin == ev->window)
 260                         drawstatus();
 261         }
 262 }
 263
 264 static void
 265 keypress(XEvent *e) {
 266         static unsigned int len = sizeof key / sizeof key[0];
 267         unsigned int i;
 268         KeySym keysym;
 269         XKeyEvent *ev = &e->xkey;
 270
 271         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 272         for(i = 0; i < len; i++)
 273                 if(keysym == key[i].keysym
 274                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 275                 {
 276                         if(key[i].func)
 277                                 key[i].func(key[i].arg);
 278                 }
 279 }
 280
 281 static void
 282 leavenotify(XEvent *e) {
 283         XCrossingEvent *ev = &e->xcrossing;
 284
 285         if((ev->window == root) && !ev->same_screen) {
 286                 selscreen = False;
 287                 focus(NULL);
 288         }
 289 }
 290
 291 static void
 292 mappingnotify(XEvent *e) {
 293         XMappingEvent *ev = &e->xmapping;
 294
 295         XRefreshKeyboardMapping(ev);
 296         if(ev->request == MappingKeyboard)
 297                 grabkeys();
 298 }
 299
 300 static void
 301 maprequest(XEvent *e) {
 302         static XWindowAttributes wa;
 303         XMapRequestEvent *ev = &e->xmaprequest;
 304
 305         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 306                 return;
 307         if(wa.override_redirect)
 308                 return;
 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         if((c = getclient(ev->window))) {
 322                 switch (ev->atom) {
 323                         default: break;
 324                         case XA_WM_TRANSIENT_FOR:
 325                                 XGetTransientForHint(dpy, c->win, &trans);
 326                                 if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
 327                                         lt->arrange();
 328                                 break;
 329                         case XA_WM_NORMAL_HINTS:
 330                                 updatesizehints(c);
 331                                 break;
 332                 }
 333                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 334                         updatetitle(c);
 335                         if(c == sel)
 336                                 drawstatus();
 337                 }
 338         }
 339 }
 340
 341 static void
 342 unmapnotify(XEvent *e) {
 343         Client *c;
 344         XUnmapEvent *ev = &e->xunmap;
 345
 346         if((c = getclient(ev->window)))
 347                 unmanage(c);
 348 }
 349
 350 /* extern */
 351
 352 void (*handler[LASTEvent]) (XEvent *) = {
 353         [ButtonPress] = buttonpress,
 354         [ConfigureRequest] = configurerequest,
 355         [ConfigureNotify] = configurenotify,
 356         [DestroyNotify] = destroynotify,
 357         [EnterNotify] = enternotify,
 358         [LeaveNotify] = leavenotify,
 359         [Expose] = expose,
 360         [KeyPress] = keypress,
 361         [MappingNotify] = mappingnotify,
 362         [MapRequest] = maprequest,
 363         [PropertyNotify] = propertynotify,
 364         [UnmapNotify] = unmapnotify
 365 };
 366
 367 void
 368 grabkeys(void) {
 369         static unsigned int len = sizeof key / sizeof key[0];
 370         unsigned int i;
 371         KeyCode code;
 372
 373         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 374         for(i = 0; i < len; i++) {
 375                 code = XKeysymToKeycode(dpy, key[i].keysym);
 376                 XGrabKey(dpy, code, key[i].mod, root, True,
 377                                 GrabModeAsync, GrabModeAsync);
 378                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 379                                 GrabModeAsync, GrabModeAsync);
 380                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 381                                 GrabModeAsync, GrabModeAsync);
 382                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 383                                 GrabModeAsync, GrabModeAsync);
 384         }
 385 }