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events.c

/* events.c -- Event handling
   $Id: events.c,v 1.160 2006/05/16 06:53:03 jsh Exp $

   Copyright (C) 1999 John Harper <john@dcs.warwick.ac.uk>

   This file is part of sawmill.

   sawmill is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   sawmill is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with sawmill; see the file COPYING.   If not, write to
   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "sawmill.h"
#include <limits.h>
#include <string.h>
#include <time.h>
#include <X11/extensions/shape.h>
#ifdef HAVE_X11_EXTENSIONS_XRANDR_H
#include <X11/extensions/Xrandr.h>
#endif
#include <X11/Xresource.h>
#include <X11/Xatom.h>

/* Lookup table of event handlers */
void (*event_handlers[LASTEvent])(XEvent *ev);

/* Map events to their names for debugging */
static char *event_names[LASTEvent];

/* Map events to the mask selecting them */
static long event_masks[LASTEvent];

/* Most recent known mouse position relative to the root window */
static int current_mouse_x, current_mouse_y;

/* ..and the position (and window) at the last button-press */
static int button_press_mouse_x = -1, button_press_mouse_y = -1;
static Window button_press_window;
static bool pointer_in_motion;

/* Most recently seen server timestamp. */
Time last_event_time;

/* Current XEvent or a null pointer */
XEvent *current_x_event;
static bool current_event_updated_mouse;
static repv current_event_window;

static repv saved_current_context_map;

/* We need a ButtonRelease on this fp. */
struct frame_part *clicked_frame_part;

/* Set to true when the pointer is actively grabbed */
static bool pointer_is_grabbed;

static XID event_handler_context;

static Atom xa_sawmill_timestamp;

DEFSYM(visibility_notify_hook, "visibility-notify-hook");
DEFSYM(destroy_notify_hook, "destroy-notify-hook");
DEFSYM(map_notify_hook, "map-notify-hook");
DEFSYM(unmap_notify_hook, "unmap-notify-hook");
DEFSYM(reparent_notify_hook, "reparent-notify-hook");
DEFSYM(property_notify_hook, "property-notify-hook");
DEFSYM(enter_notify_hook, "enter-notify-hook");
DEFSYM(leave_notify_hook, "leave-notify-hook");
DEFSYM(focus_in_hook, "focus-in-hook");
DEFSYM(focus_out_hook, "focus-out-hook");
DEFSYM(iconify_window, "iconify-window");
DEFSYM(uniconify_window, "uniconify-window");
DEFSYM(client_message_hook, "client-message-hook");
DEFSYM(window_moved_hook, "window-moved-hook");
DEFSYM(window_resized_hook, "window-resized-hook");
DEFSYM(shape_notify_hook, "shape-notify-hook");
DEFSYM(enter_frame_part_hook, "enter-frame-part-hook");
DEFSYM(leave_frame_part_hook, "leave-frame-part-hook");
DEFSYM(configure_request_hook, "configure-request-hook");
DEFSYM(configure_notify_hook, "configure-notify-hook");
DEFSYM(window_state_change_hook, "window-state-change-hook");

DEFSYM(pointer_motion_threshold, "pointer-motion-threshold");

/* for enter/leave-notify-hook */
DEFSYM(root, "root");

/* for property-notify-hook */
DEFSYM(new_value, "new-value");
DEFSYM(deleted, "deleted");

DEFSYM(urgency, "urgency");

DEFSYM(stack, "stack");
DEFSYM(above, "above");
DEFSYM(below, "below");
DEFSYM(top_if, "top-if");
DEFSYM(bottom_if, "bottom-if");
DEFSYM(opposite, "opposite");
DEFSYM(dimensions, "dimensions");

/* for enter/leave-notify-hook */
DEFSYM(normal, "normal");
DEFSYM(grab, "grab");
DEFSYM(ungrab, "ungrab");

repv Fsynthetic_configure_mutex (repv);

/* `Time' will always be 32-bits, due to underlying wire protocol (?) */
#define TIME_MAX 4294967295UL

/* Return the value of T2 - T1, compensating for clock wrap-arounds.
   If the difference is greater than half the possible range, assumes
   that T2 is _less_ than T1, returning a negative value */
static long
subtract_timestamps (Time t2, Time t1)
{
    Time diff = ((t2 >= t1)
             ? (t2 - t1)
             : (TIME_MAX - (t1 - t2) + 1));

    if (diff > TIME_MAX / 2)
      /* too big, assume it's negative */
      return - (long) (TIME_MAX - diff + 1);
    else
      return (long) diff;
}

/* Record the recently seen timestamp T */
void
save_timestamp (Time t)
{
    if (subtract_timestamps (t, last_event_time) >= 0)
      last_event_time = t;
    else
    {
      Time real = get_server_timestamp ();

      /* If the difference between T and the real server time is
         less than that between LAST-EVENT-TIME and the server time,
         then set LAST-EVENT-TIME to T. */

      if (labs (subtract_timestamps (real, t))
          < labs (subtract_timestamps (real, last_event_time)))
      {
          last_event_time = t;
      }
    }

    DB(("  last_event_time=%lu\n", last_event_time));
}

/* Where possible record the timestamp from event EV */
static void
record_event_time (XEvent *ev)
{
    switch (ev->type)
    {
    case KeyPress:
    case KeyRelease:
      save_timestamp (ev->xkey.time);
      break;

    case ButtonPress:
    case ButtonRelease:
      save_timestamp (ev->xbutton.time);
      break;

    case MotionNotify:
      save_timestamp (ev->xmotion.time);
      break;

    case EnterNotify:
    case LeaveNotify:
      save_timestamp (ev->xcrossing.time);
      break;

    case PropertyNotify:
      save_timestamp (ev->xproperty.time);
      break;
    }
}

static void
record_mouse_position (int x, int y, int event_type, Window w)
{
    bool update_press = FALSE;

    switch (event_type)
    {
    case ButtonPress:
      update_press = TRUE;
      break;

    case MotionNotify:
      if (button_press_mouse_x == -1)
          update_press = TRUE;
      break;

    case ButtonRelease:
      if (button_press_mouse_x == -1)
          update_press = TRUE;
      break;
    }

    if (update_press)
    {
      button_press_mouse_x = x;
      button_press_mouse_y = y;
      button_press_window = w;
      pointer_in_motion = FALSE;
    }

    current_mouse_x = x;
    current_mouse_y = y;
    current_event_updated_mouse = TRUE;

    if (event_type == MotionNotify && !pointer_in_motion)
    {
      int delta_x = x - button_press_mouse_x;
      int delta_y = y - button_press_mouse_y;
      repv tem = Fsymbol_value (Qpointer_motion_threshold, Qt);
      int threshold = rep_INTP (tem) ? rep_INT (tem) : 0;
      
      if (ABS (delta_x) > threshold || ABS (delta_y) > threshold)
          pointer_in_motion = TRUE;
    }
}

void
invalidate_cached_mouse_position (void)
{
    current_event_updated_mouse = FALSE;
}

static void
install_colormaps (Lisp_Window *w)
{
    XWindowAttributes attr;
    bool seen_toplevel = FALSE;
    if (w->reparented)
      XInstallColormap (dpy, image_cmap);
    if (w->n_cmap_windows > 0)
    {
      int i;
      for (i = w->n_cmap_windows - 1; i >= 0; i--)
      {
          XGetWindowAttributes (dpy, w->cmap_windows[i], &attr);
          XInstallColormap (dpy, attr.colormap);
          if (w->cmap_windows[i] == w->id)
            seen_toplevel = TRUE;
      }
    }
    if (!seen_toplevel)
    {
      XGetWindowAttributes (dpy, w->id, &attr);
      XInstallColormap (dpy, attr.colormap);
    }
}


/* Individual event handlers */

static void
visibility_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xvisibility.window);
    if (w != 0)
    {
      repv vis;
      w->frame_vis = ev->xvisibility.state;
      vis = Fwindow_visibility (rep_VAL(w));
      Fcall_window_hook (Qvisibility_notify_hook,
                     rep_VAL(w), Fcons(vis, Qnil), Qnil);
    }
}

static void
colormap_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xcolormap.window);
    if (w != 0 && ev->xcolormap.window == w->id && ev->xcolormap.new)
    {
      if (w == focus_window)
          install_colormaps (w);
    }
}

static void
key_press (XEvent *ev)
{
    record_mouse_position (ev->xkey.x_root, ev->xkey.y_root, ev->type, 0);

    /* Don't look for a context map, frame parts are never focused */
    eval_input_event (Qnil);

    XAllowEvents (dpy, SyncKeyboard, last_event_time);
}

static void
handle_fp_click (struct frame_part *fp, XEvent *ev)
{
    int old_clicked = fp->clicked;
    if (ev->type == ButtonPress)
    {
      fp->clicked = 1;
      if (clicked_frame_part != 0)
          unclick_current_fp ();
      clicked_frame_part = fp;
    }
    else if (ev->type == ButtonRelease)
    {
      fp->clicked = 0;
      clicked_frame_part = 0;
    }
    if (fp->clicked != old_clicked && fp->id != 0 && fp->win != 0)
      refresh_frame_part (fp);
}

void
unclick_current_fp (void)
{
    if (clicked_frame_part != 0)
    {
      if (clicked_frame_part->clicked)
      {
          clicked_frame_part->clicked = 0;
          if (clicked_frame_part->id != 0 && clicked_frame_part->win != 0)
            refresh_frame_part (clicked_frame_part);
      }
      clicked_frame_part = 0;
    }
}

/* Called when the pointer is ungrabbed (i.e. no ButtonRelease
   event will follow) */
void
synthesize_button_release (void)
{
    unclick_current_fp ();
    button_press_mouse_x = button_press_mouse_y = -1;
    button_press_window = 0;
}

static repv
current_context_map (void)
{
    if (saved_current_context_map == rep_NULL)
    {
      repv map = Qnil;

      /* Only use the context map if the frame part is currently clicked,
         and it's window is visible (i.e. not iconified) */
      if (clicked_frame_part
          && clicked_frame_part->clicked
          && clicked_frame_part->win != 0
          && clicked_frame_part->win->visible)
      {
          map = get_keymap_for_frame_part (clicked_frame_part);
      }

      saved_current_context_map = map;
    }

    return saved_current_context_map;
}

static void
flush_current_context_map (void)
{
    saved_current_context_map = rep_NULL;
}

static void
button_press (XEvent *ev)
{
    struct frame_part *fp;

    /* This works for both press and release events. The desired outcome
       is that press and motion events get the context map active when
       the button was initially pressed, while release events get
       the context map active when the button was released (in case the
       pointer left the frame part) */
    flush_current_context_map ();

    record_mouse_position (ev->xbutton.x_root, ev->xbutton.y_root,
                     ev->type, ev->xany.window);

    /* Only let through events we're expecting */
    if (pointer_is_grabbed
      || ev->xbutton.window != root_window
      || ev->xbutton.subwindow == None)
    {
      if (ev->type == ButtonPress)
      {
          fp = find_frame_part_by_window (ev->xbutton.window);
          if (fp != 0)
            handle_fp_click (fp, ev);
      }

      eval_input_event (current_context_map ());

      if (ev->type == ButtonRelease)
      {
          fp = find_frame_part_by_window (ev->xbutton.window);
          if (fp != 0 && !WINDOW_IS_GONE_P (fp->win))
          {
            /* In case the event binding threw a non-local-exit, fake
               an unwind-protect thing */
            repv old_throw = rep_throw_value;
            rep_GC_root gc_old_throw;
            rep_throw_value = rep_NULL;
            rep_PUSHGC(gc_old_throw, old_throw);
            handle_fp_click (fp, ev);
            rep_POPGC;
            rep_throw_value = old_throw;
          }
      }
    }

    if (ev->type == ButtonRelease)
    {
      button_press_mouse_x = button_press_mouse_y = -1;
      button_press_window = 0;
      /* The pointer is _always_ ungrabbed after a button-release */
      ungrab_pointer ();
    }

    XAllowEvents (dpy, SyncPointer, last_event_time);
}

static void
motion_notify (XEvent *ev)
{
    Window tmpw;
    int tmp;
    int x, y;
    
    /* Swallow any pending motion events as well. */
    while(XCheckMaskEvent(dpy, ButtonMotionMask, ev))
      ;
          
    /* It seems that further MotionNotify events are suspended
       until the pointer's position has been queried. I should
       check the Xlib manuals about this. */
    if(XQueryPointer(dpy, ev->xmotion.window,
                 &tmpw, &tmpw, &x, &y, &tmp, &tmp, &tmp))
    {
      record_mouse_position (x, y, ev->type, ev->xmotion.window);
    }

    /* Only let through events we're expecting */
    if (pointer_is_grabbed
      || ev->xbutton.window != root_window
      || ev->xbutton.subwindow == None)
    {
      if (pointer_in_motion)
          eval_input_event (current_context_map ());
    }

    XAllowEvents (dpy, SyncPointer, last_event_time);

    /* Don't call flush_current_context_map (), since we want to
       fix it for all motion events (in case the motion threshold
       kicks in, and the pointer leaves the original fp before
       a motion event is actually evaluated) */
}

static void
property_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xproperty.window);
    repv w_ = rep_VAL (w);          /* type alias for gc-pro'ing */
    if (w != 0 && ev->xproperty.window == w->id)
    {
      bool need_refresh = FALSE, changed = TRUE;
      repv changed_states = Qnil, prop;
      rep_GC_root gc_w, gc_changed_states;

      switch (ev->xproperty.atom)
      {
          u_char *prop;
          Atom actual;
          int format;
          long nitems, bytes_after;
          long supplied;
          bool old_urgency, new_urgency;

      case XA_WM_NAME:
      case XA_WM_ICON_NAME:
          if (ev->xproperty.state == PropertyNewValue
            && XGetWindowProperty (dpy, w->id, ev->xproperty.atom,
                               0, 200, False, AnyPropertyType, &actual,
                               &format, &nitems,
                               &bytes_after, &prop) == Success
            && actual != None)
          {
            if (format == 8 && !WINDOW_IS_GONE_P (w))
            {
                repv str = Qnil;
                if (actual == xa_compound_text || actual == XA_STRING)
                {
                  char **text_list;
                  XTextProperty tprop;
                  int count;
                  tprop.value = prop;
                  tprop.encoding = actual;
                  tprop.format = format;
                  tprop.nitems = strlen (prop);
                  if (XmbTextPropertyToTextList (dpy, &tprop,
                                           &text_list, &count)
                      >= Success)
                  {
                      if (count > 0)
                        str = rep_string_dup (text_list[0]);
                      XFreeStringList(text_list);
                  }
                }
                if (str == Qnil)
                  str = rep_null_string ();

                if (ev->xproperty.atom == XA_WM_NAME)
                {
                  if (Fequal (w->name, str) == Qnil
                      || Fequal (w->full_name, str) == Qnil)
                  {
                      w->full_name = w->name = str;
                      need_refresh = TRUE;
                  }
                  else
                      changed = FALSE;
                }
                else
                {
                  if (Fequal (w->icon_name, str) == Qnil)
                  {
                      w->icon_name = str;
                      need_refresh = TRUE;
                  }
                  else
                      changed = FALSE;
                }
            }
            XFree (prop);
          }
          break;

      case XA_WM_HINTS:
          old_urgency = w->wmhints != 0 && w->wmhints->flags & XUrgencyHint;
          if (w->wmhints != 0)
            XFree (w->wmhints);
          w->wmhints = XGetWMHints (dpy, w->id);
          new_urgency = w->wmhints != 0 && w->wmhints->flags & XUrgencyHint;
          w->icon_image = rep_NULL;
          need_refresh = TRUE;
          if (old_urgency != new_urgency)
            changed_states = Fcons (Qurgency, changed_states);
          break;

      case XA_WM_NORMAL_HINTS:
          XGetWMNormalHints (dpy, w->id, &w->hints, &supplied);
          break;

      default:
          if (ev->xproperty.atom == xa_wm_colormap_windows)
          {
            if (w->n_cmap_windows > 0)
                XFree (w->cmap_windows);
            if (!XGetWMColormapWindows (dpy, w->id, &w->cmap_windows,
                                  &w->n_cmap_windows))
            {
                w->n_cmap_windows = 0;
            }
            if (w == focus_window)
                install_colormaps (w);
          }
          else if (ev->xproperty.atom == xa_wm_protocols)
          {
            get_window_protocols (w);
          }
      }

      rep_PUSHGC (gc_w, w_);
      rep_PUSHGC (gc_changed_states, changed_states);

      prop = x_atom_symbol (ev->xproperty.atom);
      property_cache_invalidate (w_, prop);

      if (need_refresh && w->reparented
          && w->property_change != 0 && !WINDOW_IS_GONE_P (w))
      {
          w->property_change (w);
      }

      if (changed)
      {
          Fcall_window_hook (Qproperty_notify_hook, rep_VAL(w),
                         rep_list_2 (prop, ev->xproperty.state
                                 == PropertyNewValue
                                 ? Qnew_value : Qdeleted), Qnil);
      }
      if (changed_states != Qnil)
      {
          Fcall_window_hook (Qwindow_state_change_hook, rep_VAL (w),
                         rep_LIST_1 (changed_states), Qnil);
      }

      rep_POPGC; rep_POPGC;
    }
}

static void
client_message (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xclient.window);
    repv type, data, args;
    type = x_atom_symbol (ev->xclient.message_type);
    switch (ev->xclient.format)
    {
      int i;

    case 8:
      data = rep_string_dupn (ev->xclient.data.b, 20);
      break;

    case 16:
      data = Fmake_vector (rep_MAKE_INT(10), Qnil);
      for (i = 0; i < 10; i++)
          rep_VECTI(data,i) = rep_MAKE_INT (ev->xclient.data.s[i]);
      break;

    case 32:
      data = Fmake_vector (rep_MAKE_INT(5), Qnil);
      for (i = 0; i < 5; i++)
          rep_VECTI(data,i) = rep_make_long_uint (ev->xclient.data.l[i]);
      break;

    default:
      data = Qnil;
    }
    args = rep_list_2 (type, data);

    if (w != 0)
      Fcall_window_hook (Qclient_message_hook, rep_VAL(w), args, Qor);
    else
    {
      Fcall_hook (Qclient_message_hook,
                Fcons ((ev->xclient.window == root_window)
                     ? Qroot : rep_MAKE_INT(ev->xclient.window), args),
                Qor);
    }
}

static void
expose (XEvent *ev)
{
    struct frame_part *fp = find_frame_part_by_window (ev->xexpose.window);
    if (fp != 0)
      frame_part_exposer (&ev->xexpose, fp);
}

static void
destroy_notify (XEvent *ev)
{
    Lisp_Window *w = x_find_window_by_id (ev->xdestroywindow.window);
    if (w == 0 || ev->xdestroywindow.window != w->saved_id)
      return;
    remove_window (w, TRUE, FALSE);
    property_cache_invalidate_window (rep_VAL (w));
    emit_pending_destroys ();
    /* in case the id gets recycled but the window doesn't get gc'd..? */
    w->saved_id = 0;
}

void
map_request (XEvent *ev)
{
    DEFSTRING (iconify_mod, "sawfish.wm.state.iconify");
    Window id = ev->xmaprequest.window;
    Lisp_Window *w = find_window_by_id (id);
    if (w == 0)
    {
      w = add_window (id);
      if (w == 0)
          return;

      if (w->wmhints && w->wmhints->flags & StateHint
          && w->wmhints->initial_state == IconicState)
      {
          rep_call_lisp1 (module_symbol_value (rep_VAL (&iconify_mod),
                                     Qiconify_window), rep_VAL(w));
      }
    }
    else
    {
      if (!w->reparented)
      {
          Fgrab_server ();
          create_window_frame (w);
          install_window_frame (w);
          Fungrab_server ();
      }
      w->mapped = TRUE;
      rep_call_lisp1 (module_symbol_value (rep_VAL (&iconify_mod),
                                   Quniconify_window), rep_VAL(w));
    }

    if (!w->client_unmapped)
      XMapWindow (dpy, w->id);

    if (w->visible)
      XMapWindow (dpy, w->frame);

    if (w->client_unmapped)
      /* wouldn't happen otherwise */
      Fcall_window_hook (Qmap_notify_hook, rep_VAL(w), Qnil, Qnil);

}

static void
reparent_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xreparent.window);
    if (w != 0 && ev->xreparent.window == w->id
      && ev->xreparent.event == w->id)
    {
      if (ev->xreparent.parent != root_window
          && ev->xreparent.parent != w->frame)
      {
          /* Not us doing the reparenting.. */
          remove_window (w, FALSE, FALSE);
          XReparentWindow (dpy, ev->xreparent.window, ev->xreparent.parent,
                       ev->xreparent.x, ev->xreparent.y);
      }
      Fcall_window_hook (Qreparent_notify_hook, rep_VAL(w), Qnil, Qnil);
    }
}

static void
map_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xmap.window);
    if (w != 0 && ev->xmap.window == w->id && ev->xmap.event == w->id)
    {
      XWindowAttributes wa;
      XGetWindowAttributes (dpy, w->id, &wa);
      if (wa.override_redirect)
      {
          /* arrgh, the window changed its override redirect status.. */
          remove_window (w, FALSE, FALSE);
      }
      else
      {
          /* copy in some of the new values */
          w->attr.width = wa.width;
          w->attr.height = wa.height;

          w->mapped = TRUE;
          if (w->frame == 0)
            create_window_frame (w);
          install_window_frame (w);
          if (w->visible)
            XMapWindow (dpy, w->frame);
          Fcall_window_hook (Qmap_notify_hook, rep_VAL(w), Qnil, Qnil);
      }
    }
}

static void
unmap_notify (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xunmap.window);
    if (w != 0 && ev->xunmap.window == w->id
      && (ev->xunmap.event == w->id || ev->xunmap.send_event))
    {
      w->mapped = FALSE;
      if (w->reparented)
      {
          if (w->visible)
          {
            XUnmapWindow (dpy, w->frame);
            reset_frame_parts (w);
          }
          /* Removing the frame reparents the client window back to
             the root. This means that we receive the next MapRequest
             for the window. */
          remove_window_frame (w);
          destroy_window_frame (w, FALSE);
      }
      Fcall_window_hook (Qunmap_notify_hook, rep_VAL(w), Qnil, Qnil);

      XDeleteProperty (dpy, w->id, xa_wm_state);

      /* Changed the window-handling model, don't let windows exist
         while they're withdrawn */
      remove_window (w, FALSE, FALSE);
    }
}

static inline repv
mode_to_sym (int mode)
{
    return (mode == NotifyNormal ? Qnormal
          : mode == NotifyGrab ? Qgrab
          : Qungrab);
}

static void
enter_notify (XEvent *ev)
{
    struct frame_part *fp;
    repv mode = mode_to_sym (ev->xcrossing.mode);
    if (ev->xcrossing.window == root_window)
      Fcall_hook (Qenter_notify_hook, rep_list_2 (Qroot, mode), Qnil);
    else if ((fp = find_frame_part_by_window (ev->xcrossing.window)) != 0)
    {
      repv tem;
      bool refresh = FALSE;
      Lisp_Window *w = fp->win;
      if (!fp->highlighted && !frame_state_mutex)
      {
          fp->highlighted = 1;
          refresh = TRUE;
      }
      if (clicked_frame_part == fp && !frame_state_mutex)
      {
          fp->clicked = 1;
          refresh = TRUE;
      }
      if (refresh)
          refresh_frame_part (fp);

      tem = Fassq (Qclass, fp->alist);
      if (tem && rep_CONSP(tem) && !WINDOW_IS_GONE_P (w))
      {
          Fcall_window_hook (Qenter_frame_part_hook, rep_VAL(w),
                         rep_list_2 (rep_VAL(fp), mode), Qnil);
      }
    }
    else
    {
      Lisp_Window *w = find_window_by_id (ev->xcrossing.window);
      if (w != 0 && w->mapped && w->visible
          && ev->xcrossing.detail != NotifyInferior)
      {
          Fcall_window_hook (Qenter_notify_hook, rep_VAL(w),
                         rep_LIST_1 (mode), Qnil);
      }
    }
}

static void
leave_notify (XEvent *ev)
{
    struct frame_part *fp;
    repv mode = mode_to_sym (ev->xcrossing.mode);
    if (ev->xcrossing.window == root_window)
    {
      Fcall_hook (Qleave_notify_hook, rep_LIST_2 (Qroot, mode), Qnil);
    }
    else if ((fp = find_frame_part_by_window (ev->xcrossing.window)) != 0)
    {
      repv tem;
      bool refresh = FALSE;
      Lisp_Window *w = fp->win;
      if (fp->highlighted && !frame_state_mutex)
      {
          fp->highlighted = 0;
          refresh = TRUE;
      }
      if (clicked_frame_part == fp && !frame_state_mutex)
      {
          fp->clicked = 0;
          refresh = TRUE;
      }
      if (refresh)
          refresh_frame_part (fp);

      tem = Fassq (Qclass, fp->alist);
      if (tem && rep_CONSP(tem) && !WINDOW_IS_GONE_P (w))
      {
          Fcall_window_hook (Qleave_frame_part_hook, rep_VAL(w),
                         rep_LIST_2 (rep_VAL(fp), mode), Qnil);
      }
    }
    else
    {
      Lisp_Window *w = find_window_by_id (ev->xcrossing.window);
      if (w != 0 && w->mapped && w->visible
          && ev->xcrossing.detail != NotifyInferior)
      {
          Fcall_window_hook (Qleave_notify_hook, rep_VAL(w),
                         rep_LIST_1 (mode), Qnil);
      }
    }
}

static Lisp_Window *last_focused;

static void
report_focus_change (Lisp_Window *w)
{
    if (w != 0
      && w->focus_change != 0
      && !WINDOW_IS_GONE_P (w))
    {
      DB (("  calling focus change %p on %s\n",
           w->focus_change, rep_STR(w->name)));
      w->focus_change (w);
    }
}

static void
focus_in (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xfocus.window);
    if (ev->xfocus.detail == NotifyPointer)
      return;
    if (w != 0 && w->visible)
    {
      Lisp_Window *old = focus_window;
      focus_window = w;

      if (last_focused != w)
      {
          last_focused = w;
          if (old != 0)
            report_focus_change (old);
          install_colormaps (w);
          report_focus_change (w);
          if (!WINDOW_IS_GONE_P (w))
          {
            Fcall_window_hook (Qfocus_in_hook, rep_VAL(w),
                           rep_LIST_1 (mode_to_sym (ev->xfocus.mode)),
                           Qnil);
          }
      }
    }
    else if (ev->xfocus.window == root_window)
      focus_on_window (0);
}

static void
focus_out (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xfocus.window);
    if (ev->xfocus.detail == NotifyPointer)
      return;
    if (w != 0 && ev->xfocus.detail != NotifyInferior)
    {
      if (focus_window == w)
      {
          focus_window = 0;
          report_focus_change (w);
      }

      if (last_focused == w)
      {
          last_focused = 0;
          if (!WINDOW_IS_GONE_P (w))
          {
            Fcall_window_hook (Qfocus_out_hook, rep_VAL(w),
                           rep_LIST_1 (mode_to_sym (ev->xfocus.mode)),
                           Qnil);
          }
      }
    }
    else if ((w = x_find_window_by_id (ev->xunmap.window)) != 0
           && WINDOW_IS_GONE_P (w) && ev->xunmap.window == w->saved_id)
    {
      /* focus-out event from a deleted window */
      if (focus_window == w)
          focus_window = 0;
    }
}

static void
configure_request (XEvent *ev)
{
    Lisp_Window *w = find_window_by_id (ev->xconfigurerequest.window);
    if (w == 0)
    {
      XWindowChanges xwc;
      u_int xwcm = (ev->xconfigurerequest.value_mask & 
                  (CWX | CWY | CWWidth | CWHeight
                   | CWStackMode | CWSibling));
      xwc.x = ev->xconfigurerequest.x;
      xwc.y = ev->xconfigurerequest.y;
      xwc.width = ev->xconfigurerequest.width;
      xwc.height = ev->xconfigurerequest.height;
      xwc.sibling = ev->xconfigurerequest.above;
      xwc.stack_mode = ev->xconfigurerequest.detail;
      XConfigureWindow (dpy, ev->xconfigurerequest.window, xwcm, &xwc);
    }
    else if (w != 0)
    {
      u_long mask = ev->xconfigurerequest.value_mask;
      repv alist = Qnil;
      {
          /* Is the window shaped? */
          int xws, yws, xbs, ybs;
          u_int wws, hws, wbs, hbs;
          int bounding, clip;
          XShapeSelectInput (dpy, w->id, ShapeNotifyMask);
          XShapeQueryExtents (dpy, w->id, &bounding, &xws, &yws, &wws, &hws,
                        &clip, &xbs, &ybs, &wbs, &hbs);
          w->shaped = bounding ? 1 : 0;
      }
      if (mask & CWStackMode)
      {
          Window above_win;
          repv relation = Qnil, sibling = Qnil;

          above_win = ev->xconfigurerequest.above;
          if (above_win != 0)
          {
            Lisp_Window *tem = find_window_by_id (above_win);
            if (tem != 0)
                sibling = rep_VAL (tem);
          }

          switch (ev->xconfigurerequest.detail)
          {
          case Above:
            relation = Qabove;
            break;
          case Below:
            relation = Qbelow;
            break;
          case TopIf:
            relation = Qtop_if;
            break;
          case BottomIf:
            relation = Qbottom_if;
            break;
          case Opposite:
            relation = Qopposite;
            break;
          }

          if (relation != Qnil)
          {
            repv stack_data;
            stack_data = Fcons (relation, Fcons (sibling, Qnil));
            alist = Fcons (Fcons (Qstack, stack_data), alist);
          }
      }
      if ((mask & CWX) || (mask & CWY))
      {
          int x = ev->xconfigurerequest.x;
          int y = ev->xconfigurerequest.y;
          alist = Fcons (Fcons (Qposition,
                          Fcons ((mask & CWX) ? rep_MAKE_INT (x) : Qnil,
                               (mask & CWY) ? rep_MAKE_INT (y) : Qnil)),
                     alist);
      }
      if ((mask & CWWidth) || (mask & CWHeight))
      {
          int width = w->attr.width, height = w->attr.height;
          if (ev->xconfigurerequest.value_mask & CWWidth)
            width = ev->xconfigurerequest.width;
          if (ev->xconfigurerequest.value_mask & CWHeight)
            height = ev->xconfigurerequest.height;
          if (w->attr.width != width || w->attr.height != height)
          {
            alist = Fcons (Fcons (Qdimensions,
                              Fcons (rep_MAKE_INT (width),
                                   rep_MAKE_INT (height))), alist);
          }
      }
      if (alist != Qnil)
      {
          /* Be sure to send one (and only one) synthetic ConfigureNotify
             to the window. The ICCCM states that we should send the event
             even if the state of the window doesn't change. But not
             if the window has been resized */

          Fsynthetic_configure_mutex (Qt);
          send_synthetic_configure (w);

          Fcall_window_hook (Qconfigure_request_hook, rep_VAL(w),
                         rep_LIST_1 (alist), Qnil);

          Fsynthetic_configure_mutex (Qnil);
      }
    }
}

static void
gravity_notify (XEvent *ev)
{
}

static void
configure_notify (XEvent *ev)
{
    Window window = ev->xconfigure.window;
    Lisp_Window *w = find_window_by_id (ev->xcrossing.window);

    if (window == root_window)
    {
        /* It will be fairly pathological case where the server
           supports the randr extension but sawfish binary has been
           compiled without it, but we can still respond to the
           configureNotify event in a basic way */
#ifdef HAVE_X11_EXTENSIONS_XRANDR_H
        XRRUpdateConfiguration (ev);
#endif
        update_xinerama_info ();

        screen_width = ev->xconfigure.width;
        screen_height = ev->xconfigure.height;

        Fcall_hook (Qconfigure_notify_hook, rep_LIST_1(Qroot), Qnil);
     }
     else if (w != 0 && w->id == window)
     {
        Fcall_window_hook (Qconfigure_notify_hook, rep_VAL(w), Qnil, Qnil);
     }
}

static void
create_notify (XEvent *ev)
{
}

static void
circulate_notify (XEvent *ev)
{
}

static void
mapping_notify (XEvent *ev)
{
    if (ev->xmapping.request == MappingModifier
      || ev->xmapping.request == MappingKeyboard)
    {
      XRefreshKeyboardMapping (&ev->xmapping);
      update_keyboard_mapping ();
    }
}

static void
shape_notify (XEvent *ev)
{
    XShapeEvent *sev = (XShapeEvent *)ev;
    Lisp_Window *w = find_window_by_id (sev->window);
    if (w != 0 && sev->window == w->id
      && (sev->kind == ShapeBounding || sev->kind == ShapeInput))
    {
      if (sev->kind == ShapeBounding)
          w->shaped = sev->shaped ? 1 : 0;
      queue_reshape_frame (w);
      Fcall_window_hook (Qshape_notify_hook, rep_VAL(w), Qnil, Qnil);
    }
}



static int synthetic_configure_mutex;

/* From the afterstep sources, ``According to the July 27, 1988 ICCCM
   draft, we should send a "synthetic" ConfigureNotify event to the
   client if the window was moved but not resized.'' */
void
send_synthetic_configure (Lisp_Window *w)
{
    if (!synthetic_configure_mutex)
    {
      XEvent ev;
      ev.type = ConfigureNotify;
      ev.xconfigure.display = dpy;
      ev.xconfigure.event = w->id;
      ev.xconfigure.window = w->id;
      ev.xconfigure.x = w->attr.x;
      ev.xconfigure.y = w->attr.y;
      if (w->reparented)
      {
          ev.xconfigure.x -= w->frame_x;
          ev.xconfigure.y -= w->frame_y;
      }
      ev.xconfigure.width = w->attr.width;
      ev.xconfigure.height = w->attr.height;
      ev.xconfigure.border_width = w->attr.border_width;
      ev.xconfigure.above = w->reparented ? w->frame : root_window;
      ev.xconfigure.override_redirect = False;
      XSendEvent (dpy, w->id, False, StructureNotifyMask, &ev);
      w->pending_configure = 0;
    }
    else
      w->pending_configure = 1;
}

DEFUN("synthetic-configure-mutex", Fsynthetic_configure_mutex,
      Ssynthetic_configure_mutex, (repv arg), rep_Subr1) /*
::doc:sawfish.wm.events#synthetic-configure-mutex::
While this variable is non-nil no synthetic ConfigureNotify events will
be sent to windows.
::end:: */
{
    repv ret = synthetic_configure_mutex ? Qt : Qnil;
    synthetic_configure_mutex = (arg != Qnil);
    if (!synthetic_configure_mutex)
    {
      Lisp_Window *w;
      for (w = window_list; w != 0; w = w->next)
      {
          if (w->pending_configure && !WINDOW_IS_GONE_P (w))
            send_synthetic_configure (w);
      }
    }
    return ret;
}

long
get_event_mask (int type)
{
    if (type >= 0 && type < LASTEvent)
      return event_masks[type];
    else
      return 0;
}

/* Fetch a recent timestamp from the server. */
Time
get_server_timestamp (void)
{
    XEvent ev;
    Window w = no_focus_window;                 /* XXX abuse */

    /* XXX There must be an easier method.. */
    while (XCheckWindowEvent (dpy, w, PropertyChangeMask, &ev)) ;
    XSelectInput (dpy, w, PropertyChangeMask | KeyPressMask);
    XChangeProperty (dpy, w, xa_sawmill_timestamp,
                 XA_STRING, 8, PropModeReplace, "foo", 3);
    XSelectInput (dpy, w, KeyPressMask);
    XWindowEvent (dpy, w, PropertyChangeMask, &ev);

    return ev.xproperty.time;
}

void
mark_pointer_grabbed (void)
{
    pointer_is_grabbed = TRUE;
}

void
ungrab_pointer (void)
{
    pointer_is_grabbed = FALSE;
    XUngrabPointer (dpy, last_event_time);
}


/* Window-local event handlers */

/* Register that FUN should be called for any events received from
   the window with id W. */
void
register_event_handler (Window w, void (*fun)(XEvent *ev))
{
    XSaveContext (dpy, w, event_handler_context, (XPointer) fun);
}

/* Remove any event handler associated with window id W. */
void
deregister_event_handler (Window w)
{
    XDeleteContext (dpy, w, event_handler_context);
}

static inline void *
window_event_handler (Window w)
{
    union {
      void *v;
      XPointer p;
    } fun;

    return XFindContext (dpy, w, event_handler_context,
                   &fun.p) ? 0 : fun.v;
}


/* Event loop */

static repv
inner_handle_input (repv arg)
{
    XEvent *ev = (XEvent *) rep_PTR (arg);

    void (*handler)(XEvent *) = window_event_handler (ev->xany.window);
    if (handler != 0)
      (*handler) (ev);
    else if (ev->type < LASTEvent && event_handlers[ev->type] != 0)
      event_handlers[ev->type] (ev);
    else if (ev->type == shape_event_base + ShapeNotify)
      shape_notify (ev);
    else
      fprintf (stderr, "warning: unhandled event: %d\n", ev->type);
    return Qnil;
}

/* Handle all available X events matching event mask MASK. Or any events
   if MASK is zero. */
void
handle_input_mask(long mask)
{
    static time_t last_time;

    time_t current_time = time (0);
    if (current_time < last_time)
    {
      /* Hmm. Looks like the clock's been turned backwards. Refetch the
         server timestamp so we don't ignore any following timestamps */
      last_event_time = get_server_timestamp ();
    }
    last_time = current_time;

    /* Read all events in the input queue. */
    while(rep_throw_value == rep_NULL)
    {
      XEvent xev, *old_current_event = current_x_event;
      repv old_current_window = current_event_window;
      rep_GC_root gc_old_current_window;

      if (mask == 0)
      {
          if(XEventsQueued(dpy, QueuedAfterReading) <= 0)
            break;
          XNextEvent(dpy, &xev);
      }
      else
      {
          if (!XCheckMaskEvent (dpy, mask, &xev))
            break;
      }

      rep_PUSHGC(gc_old_current_window, old_current_window);
      emit_pending_destroys ();
      rep_POPGC;

      if (xev.type == NoExpose || xev.type == GraphicsExpose)
          continue;

#ifdef DEBUG
      do {
          Lisp_Window *w = x_find_window_by_id (xev.xany.window);
          DB(("** Event: %s (win %lx: %s)\n",
            xev.type < LASTEvent ? event_names[xev.type] : "unknown",
            (long)xev.xany.window, w ? (char *) rep_STR (w->name) : "unknown"));
      } while (0);
#endif

      record_event_time (&xev);
      current_x_event = &xev;
      invalidate_cached_mouse_position ();
      current_event_window = rep_NULL;

      rep_PUSHGC(gc_old_current_window, old_current_window);
      rep_call_with_barrier (inner_handle_input, rep_VAL (&xev),
                         rep_TRUE, 0, 0, 0);
      rep_POPGC;

      current_x_event = old_current_event;
      current_event_window = old_current_window;
      XFlush (dpy);
    }

    emit_pending_destroys ();
    commit_queued_focus_change ();
}

/* Handle all available X events on file descriptor FD. */
void
handle_sync_input (int fd)
{
    handle_input_mask (0);
}


/* Lisp functions */

DEFUN("query-pointer", Fquery_pointer, Squery_pointer, (repv get), rep_Subr1) /*
::doc:sawfish.wm.events#query-pointer::
query-pointer [GET-FROM-SERVER]

Returns (MOUSE-X . MOUSE-Y) representing the current mouse pointer position,
relative to the origin of the root window.

If GET-FROM-SERVER is non-nil then the position is read directly from
the server, otherwise it's taken from the current event (if possible).
::end:: */
{
    if (get != Qnil || current_x_event == 0 || !current_event_updated_mouse)
    {
      Window tmpw;
      int tmp;
      int x, y;
      if(XQueryPointer(dpy, root_window, &tmpw, &tmpw,
                   &x, &y, &tmp, &tmp, &tmp))
      {
          record_mouse_position (x, y, -1, 0);
      }
    }
    return Fcons (rep_MAKE_INT(current_mouse_x),
              rep_MAKE_INT(current_mouse_y));
}

DEFUN("query-button-press-pointer", Fquery_button_press_pointer,
      Squery_button_press_pointer, (void), rep_Subr0) /*
::doc:sawfish.wm.events#query-button-press-pointer::
query-button-press-pointer

Returns (MOUSE-X . MOUSE-Y) representing the mouse position relative to
the root window at the last button-press event.
::end:: */
{
    if (button_press_mouse_x != -1)
    {
      return Fcons (rep_MAKE_INT(button_press_mouse_x),
                  rep_MAKE_INT(button_press_mouse_y));
    }
    else
      return Qnil;
}

DEFUN("query-button-press-window", Fquery_button_press_window,
      Squery_button_press_window, (void), rep_Subr0) /*
::doc:sawfish.wm.events#query-button-press-window::
query-button-press-window

Returns the window that the mouse was in when the button was pressed.
::end:: */
{
    Lisp_Window *w;
    struct frame_part *fp;
    if (button_press_window == 0)
      return Qnil;
    if (button_press_window == root_window)
      return Qroot;
    w = find_window_by_id (button_press_window);
    if (w != 0)
      return rep_VAL(w);
    fp = find_frame_part_by_window (button_press_window);
    if (fp != 0)
      return rep_VAL(fp->win);
    return rep_MAKE_INT(button_press_window);
}

DEFUN("query-pointer-window", Fquery_pointer_window, Squery_pointer_window, (void), rep_Subr0) /*
::doc:sawfish.wm.events#query-pointer-window::
query-pointer-window

Returns the top-level window under the mouse pointer, or nil if the cursor
is in the root window.
::end:: */
{
    Window child, root;
    int win_x, win_y;
    u_int state;

    XQueryPointer (dpy, root_window, &root, &child,
               &current_mouse_x, &current_mouse_y, &win_x, &win_y, &state);
    if (child != 0)
    {
      Lisp_Window *w = find_window_by_id (child);
      if (w == 0)
      {
          struct frame_part *fp = find_frame_part_by_window (child);
          if (fp != 0)
            w = fp->win;
      }
      return w ? rep_VAL(w) : Qnil;
    }
    return Qnil;
}

DEFUN("accept-x-input", Faccept_x_input, Saccept_x_input, (repv mask), rep_Subr1) /*
::doc:sawfish.wm.events#accept-x-input::
accept-x-input [EVENT-MASK]

Handle any X events received. If EVENT-MASK is non-nil then only events
matching this numeric value are handled (see <X11/X.h>).
::end:: */
{
    handle_input_mask (rep_INTP(mask) ? rep_INT(mask) : 0);
    return Qt;
}

DEFUN("current-event-window", Fcurrent_event_window, Scurrent_event_window,
      (repv win), rep_Subr1) /*
::doc:sawfish.wm.events#current-event-window::
current-event-window

Return the window that received the current event, or the symbol
`root', or nil if no such window.
::end:: */
{
    if (WINDOWP(win))
      current_event_window = win;
    if (current_event_window == rep_NULL)
    {
      if (current_x_event != 0)
      {
          struct frame_part *fp;
          Lisp_Window *w = find_window_by_id (current_x_event->xany.window);
          if (w == 0)
          {
            fp = find_frame_part_by_window (current_x_event->xany.window);
            if (fp != 0)
                w = fp->win;
          }
          if (w != 0)
            current_event_window = rep_VAL(w);
          else if (current_x_event->xany.window == root_window)
            current_event_window = Qroot;
          else
            current_event_window = Qnil;
      }
      else
          current_event_window = Qnil;
    }

    return current_event_window;
}

DEFUN("x-server-timestamp", Fx_server_timestamp, Sx_server_timestamp,
      (repv from_server, repv store), rep_Subr2) /*
::doc:sawfish.wm.events#x-server-timestamp::
x-server-timestamp [FROM-SERVER] [STORE]

Return a recent X server timestamp, as an integer.

If FROM-SERVER is non-nil the timestamp is read directly from the
server, otherwise the most recent timestamp seen by the window manager
(i.e. from an event) is returned.
::end:: */
{
    Time time = ((from_server == Qnil)
             ? last_event_time : get_server_timestamp ());
    if (store != Qnil)
      save_timestamp (time);
    return rep_make_long_uint (time);
}

DEFUN("x-events-queued", Fx_events_queued, Sx_events_queued, (void), rep_Subr0)
{
    return rep_MAKE_INT (XEventsQueued (dpy, QueuedAfterReading));
}

DEFUN("clicked-frame-part", Fclicked_frame_part,
      Sclicked_frame_part, (void), rep_Subr0)
{
    return (clicked_frame_part != 0) ? rep_VAL (clicked_frame_part) : Qnil;
}


/* initialisation */

void
events_init (void)
{
    repv tem;

    event_handlers[VisibilityNotify] = visibility_notify;
    event_handlers[ColormapNotify] = colormap_notify;
    event_handlers[KeyPress] = key_press;
    event_handlers[KeyRelease] = key_press;
    event_handlers[ButtonPress] = button_press;
    event_handlers[ButtonRelease] = button_press;
    event_handlers[MotionNotify] = motion_notify;
    event_handlers[PropertyNotify] = property_notify;
    event_handlers[ClientMessage] = client_message;
    event_handlers[Expose] = expose;
    event_handlers[DestroyNotify] = destroy_notify;
    event_handlers[MapRequest] = map_request;
    event_handlers[MapNotify] = map_notify;
    event_handlers[UnmapNotify] = unmap_notify;
    event_handlers[EnterNotify] = enter_notify;
    event_handlers[LeaveNotify] = leave_notify;
    event_handlers[FocusIn] = focus_in;
    event_handlers[FocusOut] = focus_out;
    event_handlers[ConfigureRequest] = configure_request;
    event_handlers[GravityNotify] = gravity_notify;
    event_handlers[ConfigureNotify] = configure_notify;
    event_handlers[ReparentNotify] = reparent_notify;
    event_handlers[CreateNotify] = create_notify;
    event_handlers[CirculateNotify] = circulate_notify;
    event_handlers[MappingNotify] = mapping_notify;

    event_names[KeyPress] = "KeyPress";
    event_names[KeyRelease] = "KeyRelease";
    event_names[ButtonPress] = "ButtonPress";
    event_names[ButtonRelease] = "ButtonRelease";
    event_names[MotionNotify] = "MotionNotify";
    event_names[EnterNotify] = "EnterNotify";
    event_names[LeaveNotify] = "LeaveNotify";
    event_names[FocusIn] = "FocusIn";
    event_names[FocusOut] = "FocusOut";
    event_names[KeymapNotify] = "KeymapNotify";
    event_names[Expose] = "Expose";
    event_names[GraphicsExpose] = "GraphicsExpose";
    event_names[NoExpose] = "NoExpose";
    event_names[VisibilityNotify] = "VisibilityNotify";
    event_names[CreateNotify] = "CreateNotify";
    event_names[DestroyNotify] = "DestroyNotify";
    event_names[UnmapNotify] = "UnmapNotify";
    event_names[MapNotify] = "MapNotify";
    event_names[MapRequest] = "MapRequest";
    event_names[ReparentNotify] = "ReparentNotify";
    event_names[ConfigureNotify] = "ConfigureNotify";
    event_names[ConfigureRequest] = "ConfigureRequest";
    event_names[GravityNotify] = "GravityNotify";
    event_names[ResizeRequest] = "ResizeRequest";
    event_names[CirculateNotify] = "CirculateNotify";
    event_names[CirculateRequest] = "CirculateRequest";
    event_names[PropertyNotify] = "PropertyNotify";
    event_names[SelectionClear] = "SelectionClear";
    event_names[SelectionRequest] = "SelectionRequest";
    event_names[SelectionNotify] = "SelectionNotify";
    event_names[ColormapNotify] = "ColormapNotify";
    event_names[ClientMessage] = "ClientMessage";
    event_names[MappingNotify] = "MappingNotify";

    event_masks[KeyPress] = KeyPressMask;
    event_masks[KeyRelease] = KeyReleaseMask;
    event_masks[ButtonPress] = ButtonPressMask;
    event_masks[ButtonRelease] = ButtonReleaseMask;
    event_masks[EnterNotify] = EnterWindowMask;
    event_masks[LeaveNotify] = LeaveWindowMask;
    event_masks[MotionNotify] = (PointerMotionMask | PointerMotionHintMask
                        | Button1MotionMask | Button2MotionMask
                        | Button3MotionMask | Button4MotionMask
                        | Button5MotionMask | ButtonMotionMask);
    event_masks[FocusIn] = FocusChangeMask;
    event_masks[FocusOut] = FocusChangeMask;
    event_masks[KeymapNotify] = KeymapStateMask;
    event_masks[Expose] = ExposureMask;
    event_masks[GraphicsExpose] = 0;
    event_masks[NoExpose] = 0;
    event_masks[VisibilityNotify] = VisibilityChangeMask;
    event_masks[CreateNotify] = SubstructureNotifyMask;
    event_masks[DestroyNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[UnmapNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[MapNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[MapRequest] = 0;
    event_masks[ReparentNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[ConfigureNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[ConfigureRequest] = 0;
    event_masks[GravityNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[ResizeRequest] = 0;
    event_masks[CirculateNotify] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[CirculateRequest] = StructureNotifyMask | SubstructureNotifyMask;
    event_masks[PropertyNotify] = PropertyChangeMask;
    event_masks[SelectionClear] = 0;
    event_masks[SelectionRequest] = 0;
    event_masks[SelectionNotify] = 0;
    event_masks[ColormapNotify] = ColormapChangeMask;
    event_masks[ClientMessage] = 0;
    event_masks[MappingNotify] = StructureNotifyMask | SubstructureNotifyMask;

    tem = rep_push_structure ("sawfish.wm.events");
    rep_ADD_SUBR(Squery_pointer);
    rep_ADD_SUBR(Squery_button_press_pointer);
    rep_ADD_SUBR(Squery_button_press_window);
    rep_ADD_SUBR(Squery_pointer_window);
    rep_ADD_SUBR(Saccept_x_input);
    rep_ADD_SUBR(Scurrent_event_window);
    rep_ADD_SUBR(Sx_server_timestamp);
    rep_ADD_SUBR(Sx_events_queued);
    rep_ADD_SUBR(Sclicked_frame_part);
    rep_ADD_SUBR(Ssynthetic_configure_mutex);
    rep_pop_structure (tem);

    rep_INTERN_SPECIAL(visibility_notify_hook);
    rep_INTERN_SPECIAL(destroy_notify_hook);
    rep_INTERN_SPECIAL(map_notify_hook);
    rep_INTERN_SPECIAL(unmap_notify_hook);
    rep_INTERN_SPECIAL(reparent_notify_hook);
    rep_INTERN_SPECIAL(property_notify_hook);
    rep_INTERN_SPECIAL(enter_notify_hook);
    rep_INTERN_SPECIAL(leave_notify_hook);
    rep_INTERN_SPECIAL(focus_in_hook);
    rep_INTERN_SPECIAL(focus_out_hook);
    rep_INTERN_SPECIAL(client_message_hook);
    rep_INTERN_SPECIAL(window_moved_hook);
    rep_INTERN_SPECIAL(window_resized_hook);
    rep_INTERN_SPECIAL(shape_notify_hook);
    rep_INTERN_SPECIAL(enter_frame_part_hook);
    rep_INTERN_SPECIAL(leave_frame_part_hook);
    rep_INTERN_SPECIAL(configure_notify_hook);
    rep_INTERN_SPECIAL(configure_request_hook);
    rep_INTERN_SPECIAL(window_state_change_hook);

    rep_INTERN_SPECIAL(pointer_motion_threshold);

    rep_INTERN(iconify_window);
    rep_INTERN(uniconify_window);
    rep_INTERN(root);
    rep_INTERN(new_value);
    rep_INTERN(deleted);
    rep_INTERN(urgency);

    rep_INTERN(stack);
    rep_INTERN(above);
    rep_INTERN(below);
    rep_INTERN(bottom_if);
    rep_INTERN(top_if);
    rep_INTERN(opposite);
    rep_INTERN(dimensions);

    rep_INTERN(normal);
    rep_INTERN(grab);
    rep_INTERN(ungrab);

    rep_mark_static (&current_event_window);
    rep_mark_static (&saved_current_context_map);

    event_handler_context = XUniqueContext ();

    if(!batch_mode_p ())
    {
      xa_sawmill_timestamp = XInternAtom (dpy, "_SAWMILL_TIMESTAMP", False);
      last_event_time = get_server_timestamp ();
    }
}

void
events_kill (void)
{
}

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