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 <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 Client *
  24 getclient(Window w) {
  25         Client *c;
  26
  27         for(c = clients; c && c->win != w; c = c->next);
  28         return c;
  29 }
  30
  31 static void
  32 movemouse(Client *c) {
  33         int x1, y1, ocx, ocy, di, nx, ny;
  34         unsigned int dui;
  35         Window dummy;
  36         XEvent ev;
  37
  38         ocx = nx = c->x;
  39         ocy = ny = c->y;
  40         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  41                         None, cursor[CurMove], CurrentTime) != GrabSuccess)
  42                 return;
  43         c->ismax = False;
  44         XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
  45         for(;;) {
  46                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask, &ev);
  47                 switch (ev.type) {
  48                 case ButtonRelease:
  49                         XUngrabPointer(dpy, CurrentTime);
  50                         return;
  51                 case ConfigureRequest:
  52                 case Expose:
  53                 case MapRequest:
  54                         handler[ev.type](&ev);
  55                         break;
  56                 case MotionNotify:
  57                         XSync(dpy, False);
  58                         nx = ocx + (ev.xmotion.x - x1);
  59                         ny = ocy + (ev.xmotion.y - y1);
  60                         if(abs(wax + nx) < SNAP)
  61                                 nx = wax;
  62                         else if(abs((wax + waw) - (nx + c->w + 2 * c->border)) < SNAP)
  63                                 nx = wax + waw - c->w - 2 * c->border;
  64                         if(abs(way - ny) < SNAP)
  65                                 ny = way;
  66                         else if(abs((way + wah) - (ny + c->h + 2 * c->border)) < SNAP)
  67                                 ny = way + wah - c->h - 2 * c->border;
  68                         resize(c, nx, ny, c->w, c->h, False);
  69                         break;
  70                 }
  71         }
  72 }
  73
  74 static void
  75 resizemouse(Client *c) {
  76         int ocx, ocy;
  77         int nw, nh;
  78         XEvent ev;
  79
  80         ocx = c->x;
  81         ocy = c->y;
  82         if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
  83                         None, cursor[CurResize], CurrentTime) != GrabSuccess)
  84                 return;
  85         c->ismax = False;
  86         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->border - 1, c->h + c->border - 1);
  87         for(;;) {
  88                 XMaskEvent(dpy, MOUSEMASK | ExposureMask | SubstructureRedirectMask , &ev);
  89                 switch(ev.type) {
  90                 case ButtonRelease:
  91                         XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
  92                                         c->w + c->border - 1, c->h + c->border - 1);
  93                         XUngrabPointer(dpy, CurrentTime);
  94                         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
  95                         return;
  96                 case ConfigureRequest:
  97                 case Expose:
  98                 case MapRequest:
  99                         handler[ev.type](&ev);
 100                         break;
 101                 case MotionNotify:
 102                         XSync(dpy, False);
 103                         if((nw = ev.xmotion.x - ocx - 2 * c->border + 1) <= 0)
 104                                 nw = 1;
 105                         if((nh = ev.xmotion.y - ocy - 2 * c->border + 1) <= 0)
 106                                 nh = 1;
 107                         resize(c, c->x, c->y, nw, nh, True);
 108                         break;
 109                 }
 110         }
 111 }
 112
 113 static void
 114 buttonpress(XEvent *e) {
 115         int x;
 116         Arg a;
 117         Client *c;
 118         XButtonPressedEvent *ev = &e->xbutton;
 119
 120         if(barwin == ev->window) {
 121                 x = 0;
 122                 for(a.i = 0; a.i < ntags; a.i++) {
 123                         x += textw(tags[a.i]);
 124                         if(ev->x < x) {
 125                                 if(ev->button == Button1) {
 126                                         if(ev->state & MODKEY)
 127                                                 tag(a);
 128                                         else
 129                                                 view(a);
 130                                 }
 131                                 else if(ev->button == Button3) {
 132                                         if(ev->state & MODKEY)
 133                                                 toggletag(a);
 134                                         else
 135                                                 toggleview(a);
 136                                 }
 137                                 return;
 138                         }
 139                 }
 140                 if(ev->x < x + blw)
 141                         switch(ev->button) {
 142                         case Button1:
 143                                 a.i = -1;
 144                                 setlayout(a);
 145                                 break;
 146                         }
 147         }
 148         else if((c = getclient(ev->window))) {
 149                 focus(c);
 150                 if(CLEANMASK(ev->state) != MODKEY)
 151                         return;
 152                 if(ev->button == Button1 && (lt->arrange == versatile || c->isversatile)) {
 153                         restack();
 154                         movemouse(c);
 155                 }
 156                 else if(ev->button == Button2)
 157                         zoom(a);
 158                 else if(ev->button == Button3
 159                 && (lt->arrange == versatile || c->isversatile) && !c->isfixed)
 160                 {
 161                         restack();
 162                         resizemouse(c);
 163                 }
 164         }
 165 }
 166
 167 static void
 168 configurerequest(XEvent *e) {
 169         Client *c;
 170         XConfigureRequestEvent *ev = &e->xconfigurerequest;
 171         XWindowChanges wc;
 172
 173         if((c = getclient(ev->window))) {
 174                 c->ismax = False;
 175                 if(ev->value_mask & CWBorderWidth)
 176                         c->border = ev->border_width;
 177                 if(c->isfixed || c->isversatile || (lt->arrange == versatile)) {
 178                         if(ev->value_mask & CWX)
 179                                 c->x = ev->x;
 180                         if(ev->value_mask & CWY)
 181                                 c->y = ev->y;
 182                         if(ev->value_mask & CWWidth)
 183                                 c->w = ev->width;
 184                         if(ev->value_mask & CWHeight)
 185                                 c->h = ev->height;
 186                         if((ev->value_mask & (CWX | CWY))
 187                         && !(ev->value_mask & (CWWidth | CWHeight)))
 188                                 configure(c);
 189                         if(isvisible(c))
 190                                 XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
 191                 }
 192                 else
 193                         configure(c);
 194         }
 195         else {
 196                 wc.x = ev->x;
 197                 wc.y = ev->y;
 198                 wc.width = ev->width;
 199                 wc.height = ev->height;
 200                 wc.border_width = ev->border_width;
 201                 wc.sibling = ev->above;
 202                 wc.stack_mode = ev->detail;
 203                 XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
 204         }
 205         XSync(dpy, False);
 206 }
 207
 208 static void
 209 destroynotify(XEvent *e) {
 210         Client *c;
 211         XDestroyWindowEvent *ev = &e->xdestroywindow;
 212
 213         if((c = getclient(ev->window)))
 214                 unmanage(c);
 215 }
 216
 217 static void
 218 enternotify(XEvent *e) {
 219         Client *c;
 220         XCrossingEvent *ev = &e->xcrossing;
 221
 222         if(ev->mode != NotifyNormal || ev->detail == NotifyInferior)
 223                 return;
 224         if((c = getclient(ev->window)) && isvisible(c))
 225                 focus(c);
 226         else if(ev->window == root) {
 227                 selscreen = True;
 228                 for(c = stack; c && !isvisible(c); c = c->snext);
 229                 focus(c);
 230         }
 231 }
 232
 233 static void
 234 expose(XEvent *e) {
 235         XExposeEvent *ev = &e->xexpose;
 236
 237         if(ev->count == 0) {
 238                 if(barwin == ev->window)
 239                         drawstatus();
 240         }
 241 }
 242
 243 static void
 244 keypress(XEvent *e) {
 245         static unsigned int len = sizeof key / sizeof key[0];
 246         unsigned int i;
 247         KeySym keysym;
 248         XKeyEvent *ev = &e->xkey;
 249
 250         keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
 251         for(i = 0; i < len; i++)
 252                 if(keysym == key[i].keysym
 253                 && CLEANMASK(key[i].mod) == CLEANMASK(ev->state))
 254                 {
 255                         if(key[i].func)
 256                                 key[i].func(key[i].arg);
 257                 }
 258 }
 259
 260 static void
 261 leavenotify(XEvent *e) {
 262         XCrossingEvent *ev = &e->xcrossing;
 263
 264         if((ev->window == root) && !ev->same_screen) {
 265                 selscreen = False;
 266                 focus(NULL);
 267         }
 268 }
 269
 270 static void
 271 mappingnotify(XEvent *e) {
 272         XMappingEvent *ev = &e->xmapping;
 273
 274         XRefreshKeyboardMapping(ev);
 275         if(ev->request == MappingKeyboard)
 276                 grabkeys();
 277 }
 278
 279 static void
 280 maprequest(XEvent *e) {
 281         static XWindowAttributes wa;
 282         XMapRequestEvent *ev = &e->xmaprequest;
 283
 284         if(!XGetWindowAttributes(dpy, ev->window, &wa))
 285                 return;
 286         if(wa.override_redirect)
 287                 return;
 288         if(!getclient(ev->window))
 289                 manage(ev->window, &wa);
 290 }
 291
 292 static void
 293 propertynotify(XEvent *e) {
 294         Client *c;
 295         Window trans;
 296         XPropertyEvent *ev = &e->xproperty;
 297
 298         if(ev->state == PropertyDelete)
 299                 return; /* ignore */
 300         if((c = getclient(ev->window))) {
 301                 switch (ev->atom) {
 302                         default: break;
 303                         case XA_WM_TRANSIENT_FOR:
 304                                 XGetTransientForHint(dpy, c->win, &trans);
 305                                 if(!c->isversatile && (c->isversatile = (getclient(trans) != NULL)))
 306                                         lt->arrange();
 307                                 break;
 308                         case XA_WM_NORMAL_HINTS:
 309                                 updatesizehints(c);
 310                                 break;
 311                 }
 312                 if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
 313                         updatetitle(c);
 314                         if(c == sel)
 315                                 drawstatus();
 316                 }
 317         }
 318 }
 319
 320 static void
 321 unmapnotify(XEvent *e) {
 322         Client *c;
 323         XUnmapEvent *ev = &e->xunmap;
 324
 325         if((c = getclient(ev->window)))
 326                 unmanage(c);
 327 }
 328
 329 /* extern */
 330
 331 void (*handler[LASTEvent]) (XEvent *) = {
 332         [ButtonPress] = buttonpress,
 333         [ConfigureRequest] = configurerequest,
 334         [DestroyNotify] = destroynotify,
 335         [EnterNotify] = enternotify,
 336         [LeaveNotify] = leavenotify,
 337         [Expose] = expose,
 338         [KeyPress] = keypress,
 339         [MappingNotify] = mappingnotify,
 340         [MapRequest] = maprequest,
 341         [PropertyNotify] = propertynotify,
 342         [UnmapNotify] = unmapnotify
 343 };
 344
 345 void
 346 grabkeys(void) {
 347         static unsigned int len = sizeof key / sizeof key[0];
 348         unsigned int i;
 349         KeyCode code;
 350
 351         XUngrabKey(dpy, AnyKey, AnyModifier, root);
 352         for(i = 0; i < len; i++) {
 353                 code = XKeysymToKeycode(dpy, key[i].keysym);
 354                 XGrabKey(dpy, code, key[i].mod, root, True,
 355                                 GrabModeAsync, GrabModeAsync);
 356                 XGrabKey(dpy, code, key[i].mod | LockMask, root, True,
 357                                 GrabModeAsync, GrabModeAsync);
 358                 XGrabKey(dpy, code, key[i].mod | numlockmask, root, True,
 359                                 GrabModeAsync, GrabModeAsync);
 360                 XGrabKey(dpy, code, key[i].mod | numlockmask | LockMask, root, True,
 361                                 GrabModeAsync, GrabModeAsync);
 362         }
 363 }