there's this case where we DONT want to ignore both events or we end up without anyth...

[chaz/openbox] / openbox / event.c

#include "openbox.h"
#include "dock.h"
#include "client.h"
#include "xerror.h"
#include "prop.h"
#include "config.h"
#include "screen.h"
#include "frame.h"
#include "menu.h"
#include "framerender.h"
#include "focus.h"
#include "moveresize.h"
#include "stacking.h"
#include "extensions.h"
#include "timer.h"
#include "dispatch.h"
#include "event.h"

#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <glib.h>

#ifdef USE_LIBSN
#  include <libsn/sn.h>
#endif

#ifdef HAVE_SYS_SELECT_H
#  include <sys/select.h>
#endif

static void event_process(XEvent *e);
static void event_handle_root(XEvent *e);
static void event_handle_dock(Dock *s, XEvent *e);
static void event_handle_dockapp(DockApp *app, XEvent *e);
static void event_handle_client(Client *c, XEvent *e);
static void event_handle_menu(Menu *menu, Client *c, XEvent *e);

#define INVALID_FOCUSIN(e) ((e)->xfocus.detail == NotifyInferior || \
                            (e)->xfocus.detail == NotifyAncestor || \
                            (e)->xfocus.detail > NotifyNonlinearVirtual)
#define INVALID_FOCUSOUT(e) ((e)->xfocus.mode == NotifyGrab || \
                             (e)->xfocus.detail == NotifyInferior || \
                             (e)->xfocus.detail == NotifyAncestor || \
                             (e)->xfocus.detail > NotifyNonlinearVirtual)

Time event_lasttime = 0;

/*! The value of the mask for the NumLock modifier */
unsigned int NumLockMask;
/*! The value of the mask for the ScrollLock modifier */
unsigned int ScrollLockMask;
/*! The key codes for the modifier keys */
static XModifierKeymap *modmap;
/*! Table of the constant modifier masks */
static const int mask_table[] = {
    ShiftMask, LockMask, ControlMask, Mod1Mask,
    Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
};
static int mask_table_size;

static fd_set selset, allset;
static int max_fd, x_fd;
static GData *fd_handler_list;

void fd_event_handle();

void event_startup()
{
    mask_table_size = sizeof(mask_table) / sizeof(mask_table[0]);
     
    /* get lock masks that are defined by the display (not constant) */
    modmap = XGetModifierMapping(ob_display);
    g_assert(modmap);
    if (modmap && modmap->max_keypermod > 0) {
        size_t cnt;
        const size_t size = mask_table_size * modmap->max_keypermod;
        /* get the values of the keyboard lock modifiers
           Note: Caps lock is not retrieved the same way as Scroll and Num
           lock since it doesn't need to be. */
        const KeyCode num_lock = XKeysymToKeycode(ob_display, XK_Num_Lock);
        const KeyCode scroll_lock = XKeysymToKeycode(ob_display,
                                                     XK_Scroll_Lock);
          
        for (cnt = 0; cnt < size; ++cnt) {
            if (! modmap->modifiermap[cnt]) continue;
               
            if (num_lock == modmap->modifiermap[cnt])
                NumLockMask = mask_table[cnt / modmap->max_keypermod];
            if (scroll_lock == modmap->modifiermap[cnt])
                ScrollLockMask = mask_table[cnt / modmap->max_keypermod];
        }
    }

    FD_ZERO(&allset);
    max_fd = x_fd = ConnectionNumber(ob_display);
    FD_SET(x_fd, &allset);
    g_datalist_init(&fd_handler_list);
}

void event_shutdown()
{
    XFreeModifiermap(modmap);
    g_datalist_clear(&fd_handler_list);
}

void event_loop()
{
    XEvent e;
    struct timeval *wait;
    gboolean had_event = FALSE;

    while (TRUE) {
        /*
          There are slightly different event retrieval semantics here for
          local (or high bandwidth) versus remote (or low bandwidth)
          connections to the display/Xserver.
        */
        if (ob_remote) {
            if (!XPending(ob_display))
                break;
        } else {
            /*
              This XSync allows for far more compression of events, which
              makes things like Motion events perform far far better. Since
              it also means network traffic for every event instead of every
              X events (where X is the number retrieved at a time), it
              probably should not be used for setups where Openbox is
              running on a remote/low bandwidth display/Xserver.
            */
            XSync(ob_display, FALSE);
            if (!XEventsQueued(ob_display, QueuedAlready))
                break;
        }
        XNextEvent(ob_display, &e);

#ifdef USE_LIBSN
        sn_display_process_event(ob_sn_display, &e);
#endif

        event_process(&e);
        had_event = TRUE;
    }

    if (!had_event) {
        timer_dispatch((GTimeVal**)&wait);
        selset = allset;
        select(max_fd + 1, &selset, NULL, NULL, wait);

        /* handle the X events as soon as possible? */
        if (FD_ISSET(x_fd, &selset))
            return;

        fd_event_handle();
    }
}

static Window event_get_window(XEvent *e)
{
    Window window;

    /* pick a window */
    switch (e->type) {
    case MapRequest:
        window = e->xmap.window;
        break;
    case UnmapNotify:
        window = e->xunmap.window;
        break;
    case DestroyNotify:
        window = e->xdestroywindow.window;
        break;
    case ConfigureRequest:
        window = e->xconfigurerequest.window;
        break;
    case ConfigureNotify:
        window = e->xconfigure.window;
        break;
    default:
#ifdef XKB
        if (extensions_xkb && e->type == extensions_xkb_event_basep) {
            switch (((XkbAnyEvent*)&e)->xkb_type) {
            case XkbBellNotify:
                window = ((XkbBellNotifyEvent*)&e)->window;
            default:
                window = None;
            }
        } else
#endif
            window = e->xany.window;
    }
    return window;
}

static void event_set_lasttime(XEvent *e)
{
    /* grab the lasttime and hack up the state */
    switch (e->type) {
    case ButtonPress:
    case ButtonRelease:
        event_lasttime = e->xbutton.time;
        break;
    case KeyPress:
        event_lasttime = e->xkey.time;
        break;
    case KeyRelease:
        event_lasttime = e->xkey.time;
        break;
    case MotionNotify:
        event_lasttime = e->xmotion.time;
        break;
    case PropertyNotify:
        event_lasttime = e->xproperty.time;
        break;
    case EnterNotify:
    case LeaveNotify:
        event_lasttime = e->xcrossing.time;
        break;
    default:
        event_lasttime = CurrentTime;
        break;
    }
}

#define STRIP_MODS(s) \
        s &= ~(LockMask | NumLockMask | ScrollLockMask), \
        /* kill off the Button1Mask etc, only want the modifiers */ \
        s &= (ControlMask | ShiftMask | Mod1Mask | \
              Mod2Mask | Mod3Mask | Mod4Mask | Mod5Mask) \

static void event_hack_mods(XEvent *e)
{
    KeyCode *kp;
    int i, k;

    switch (e->type) {
    case ButtonPress:
    case ButtonRelease:
        STRIP_MODS(e->xbutton.state);
        break;
    case KeyPress:
        STRIP_MODS(e->xkey.state);
        break;
    case KeyRelease:
        STRIP_MODS(e->xkey.state);
        /* remove from the state the mask of the modifier being released, if
           it is a modifier key being released (this is a little ugly..) */
        kp = modmap->modifiermap;
        for (i = 0; i < mask_table_size; ++i) {
            for (k = 0; k < modmap->max_keypermod; ++k) {
                if (*kp == e->xkey.keycode) { /* found the keycode */
                    /* remove the mask for it */
                    e->xkey.state &= ~mask_table[i];
                    /* cause the first loop to break; */
                    i = mask_table_size;
                    break; /* get outta here! */
                }
                ++kp;
            }
        }
        break;
    case MotionNotify:
        STRIP_MODS(e->xmotion.state);
        /* compress events */
        {
            XEvent ce;
            while (XCheckTypedWindowEvent(ob_display, e->xmotion.window,
                                          e->type, &ce)) {
                e->xmotion.x_root = ce.xmotion.x_root;
                e->xmotion.y_root = ce.xmotion.y_root;
            }
        }
        break;
    }
}

static gboolean event_ignore(XEvent *e, Client *client)
{
    switch(e->type) {
    case FocusIn:
        /* NotifyAncestor is not ignored in FocusIn like it is in FocusOut
           because of RevertToPointerRoot. If the focus ends up reverting to
           pointer root on a workspace change, then the FocusIn event that we
           want will be of type NotifyAncestor. This situation does not occur
           for FocusOut, so it is safely ignored there.
        */
        if (INVALID_FOCUSIN(e) ||
            client == NULL) {
#ifdef DEBUG_FOCUS
        g_message("FocusIn on %lx mode %d detail %d IGNORED", e->xfocus.window,
                  e->xfocus.mode, e->xfocus.detail);
#endif
            /* says a client was not found for the event (or a valid FocusIn
               event was not found.
            */
            e->xfocus.window = None;
            return TRUE;
        }

#ifdef DEBUG_FOCUS
        g_message("FocusIn on %lx mode %d detail %d", e->xfocus.window,
                  e->xfocus.mode, e->xfocus.detail);
#endif
        break;
    case FocusOut:
        if (INVALID_FOCUSOUT(e)) {
#ifdef DEBUG_FOCUS
        g_message("FocusOut on %lx mode %d detail %d IGNORED",
                  e->xfocus.window, e->xfocus.mode, e->xfocus.detail);
#endif
            return TRUE;
        }

#ifdef DEBUG_FOCUS
        g_message("FocusOut on %lx mode %d detail %d",
                  e->xfocus.window, e->xfocus.mode, e->xfocus.detail);
#endif

        {
            XEvent fe;
            gboolean fallback = TRUE;

            while (TRUE) {
                if (!XCheckTypedWindowEvent(ob_display, FocusOut,
                                            e->xfocus.window,&fe))
                    if (!XCheckTypedEvent(ob_display, FocusIn, &fe))
                        break;
                if (fe.type == FocusOut) {
#ifdef DEBUG_FOCUS
                    g_message("found pending FocusOut");
#endif
                    if (!INVALID_FOCUSOUT(&fe)) {
                        /* if there is a VALID FocusOut still coming, don't
                           fallback focus yet, we'll deal with it then */
                        XPutBackEvent(ob_display, &fe);
                        fallback = FALSE;
                        break;
                    }
                } else {
#ifdef DEBUG_FOCUS
                    g_message("found pending FocusIn");
#endif
                    /* is the focused window getting a FocusOut/In back to
                       itself?
                    */
                    if (fe.xfocus.window == e->xfocus.window &&
                        !event_ignore(&fe, client)) {
                        /*
                          if focus_client is not set, then we can't do
                          this. we need the FocusIn. This happens in the
                          case when the set_focus_client(NULL) in the
                          focus_fallback function fires and then
                          focus_fallback picks the currently focused
                          window (such as on a SendToDesktop-esque action.
                        */
                        if (focus_client) {
#ifdef DEBUG_FOCUS
                            g_message("focused window got an Out/In back to "
                                      "itself IGNORED both");
#endif
                            return TRUE;
                        } else {
                            event_process(&fe);
#ifdef DEBUG_FOCUS
                            g_message("focused window got an Out/In back to "
                                      "itself but focus_client was null "
                                      "IGNORED just the Out");
#endif
                            return TRUE;
                        }
                    }

                    /* once all the FocusOut's have been dealt with, if there
                       is a FocusIn still left and it is valid, then use it */
                    event_process(&fe);
                    /* secret magic way of event_process telling us that no
                       client was found for the FocusIn event. ^_^ */
                    if (fe.xfocus.window != None) {
                        fallback = FALSE;
                        break;
                    }
                }
            }
            if (fallback) {
#ifdef DEBUG_FOCUS
                g_message("no valid FocusIn and no FocusOut events found, "
                          "falling back");
#endif
                focus_fallback(Fallback_NoFocus);
            }
        }
        break;
    case EnterNotify:
    case LeaveNotify:
        /* NotifyUngrab occurs when a mouse button is released and the event is
           caused, like when lowering a window */
        /* NotifyVirtual occurs when ungrabbing the pointer */
        if (e->xcrossing.mode == NotifyGrab ||
            e->xcrossing.detail == NotifyInferior ||
            (e->xcrossing.mode == NotifyUngrab &&
             e->xcrossing.detail == NotifyVirtual)) {
#ifdef DEBUG_FOCUS
            g_message("%sNotify mode %d detail %d on %lx IGNORED",
                      (e->type == EnterNotify ? "Enter" : "Leave"),
                      e->xcrossing.mode,
                      e->xcrossing.detail, client?client->window:0);
#endif
            return TRUE;
        }
#ifdef DEBUG_FOCUS
        g_message("%sNotify mode %d detail %d on %lx",
                  (e->type == EnterNotify ? "Enter" : "Leave"),
                  e->xcrossing.mode,
                  e->xcrossing.detail, client?client->window:0);
#endif
        break;
    }
    return FALSE;
}

static void event_process(XEvent *e)
{
    Window window;
    Client *client = NULL;
    Dock *dock = NULL;
    DockApp *dockapp = NULL;
    Menu *menu = NULL;
    ObWindow *obwin = NULL;

    window = event_get_window(e);
    if ((obwin = g_hash_table_lookup(window_map, &window))) {
        switch (obwin->type) {
        case Window_Dock:
            dock = WINDOW_AS_DOCK(obwin);
            break;
        case Window_DockApp:
            dockapp = WINDOW_AS_DOCKAPP(obwin);
            break;
        case Window_Menu:
            menu = WINDOW_AS_MENU(obwin);
            break;
        case Window_Client:
            client = WINDOW_AS_CLIENT(obwin);
            break;
        case Window_Internal:
            /* not to be used for events */
            g_assert_not_reached();
            break;
        }
    }

    event_set_lasttime(e);
    event_hack_mods(e);
    if (event_ignore(e, client))
        return;

    /* deal with it in the kernel */
    if (menu) {
        event_handle_menu(menu, client, e);
        return;
    } else if (client)
        event_handle_client(client, e);
    else if (dockapp)
        event_handle_dockapp(dockapp, e);
    else if (dock)
        event_handle_dock(dock, e);
    else if (window == ob_root)
        event_handle_root(e);
    else if (e->type == MapRequest)
        client_manage(window);
    else if (e->type == ConfigureRequest) {
        /* unhandled configure requests must be used to configure the
           window directly */
        XWindowChanges xwc;
               
        xwc.x = e->xconfigurerequest.x;
        xwc.y = e->xconfigurerequest.y;
        xwc.width = e->xconfigurerequest.width;
        xwc.height = e->xconfigurerequest.height;
        xwc.border_width = e->xconfigurerequest.border_width;
        xwc.sibling = e->xconfigurerequest.above;
        xwc.stack_mode = e->xconfigurerequest.detail;
       
        /* we are not to be held responsible if someone sends us an
           invalid request! */
        xerror_set_ignore(TRUE);
        XConfigureWindow(ob_display, window,
                         e->xconfigurerequest.value_mask, &xwc);
        xerror_set_ignore(FALSE);
    }

    if (moveresize_in_progress)
        if (e->type == MotionNotify || e->type == ButtonRelease ||
            e->type == ButtonPress ||
            e->type == KeyPress || e->type == KeyRelease) {
            moveresize_event(e);

            return; /* no dispatch! */
            
        }

    /* user input (action-bound) events */
    /*
    if (e->type == ButtonPress || e->type == ButtonRelease ||
        e->type == MotionNotify)
        mouse_event(e, client);
    else if (e->type == KeyPress || e->type == KeyRelease)
        ;
    */

    /* dispatch the event to registered handlers */
    dispatch_x(e, client);
}

static void event_handle_root(XEvent *e)
{
    Atom msgtype;
     
    switch(e->type) {
    case ClientMessage:
        if (e->xclient.format != 32) break;

        msgtype = e->xclient.message_type;
        if (msgtype == prop_atoms.net_current_desktop) {
            unsigned int d = e->xclient.data.l[0];
            if (d < screen_num_desktops)
                screen_set_desktop(d);
        } else if (msgtype == prop_atoms.net_number_of_desktops) {
            unsigned int d = e->xclient.data.l[0];
            if (d > 0)
                screen_set_num_desktops(d);
        } else if (msgtype == prop_atoms.net_showing_desktop) {
            screen_show_desktop(e->xclient.data.l[0] != 0);
        }
        break;
    case PropertyNotify:
        if (e->xproperty.atom == prop_atoms.net_desktop_names)
            screen_update_desktop_names();
        else if (e->xproperty.atom == prop_atoms.net_desktop_layout)
            screen_update_layout();
        break;
    case ConfigureNotify:
#ifdef XRANDR
        XRRUpdateConfiguration(e);
#endif
        if (e->xconfigure.width != screen_physical_size.width ||
            e->xconfigure.height != screen_physical_size.height)
            screen_resize(e->xconfigure.width, e->xconfigure.height);
        break;
    default:
        ;
#ifdef VIDMODE
        if (extensions_vidmode && e->type == extensions_vidmode_event_basep) {
            g_message("VIDMODE EVENT");
        }
#endif
    }
}

static void event_handle_client(Client *client, XEvent *e)
{
    XEvent ce;
    Atom msgtype;
    int i=0;
     
    switch (e->type) {
    case ButtonPress:
    case ButtonRelease:
        /* Wheel buttons don't draw because they are an instant click, so it
           is a waste of resources to go drawing it. */
        if (!(e->xbutton.button == 4 || e->xbutton.button == 5)) {
            switch (frame_context(client, e->xbutton.window)) {
            case Context_Maximize:
                client->frame->max_press = (e->type == ButtonPress);
                framerender_frame(client->frame);
                break;
            case Context_Close:
                client->frame->close_press = (e->type == ButtonPress);
                framerender_frame(client->frame);
                break;
            case Context_Iconify:
                client->frame->iconify_press = (e->type == ButtonPress);
                framerender_frame(client->frame);
                break;
            case Context_AllDesktops:
                client->frame->desk_press = (e->type == ButtonPress);
                framerender_frame(client->frame);
                break; 
            case Context_Shade:
                client->frame->shade_press = (e->type == ButtonPress);
                framerender_frame(client->frame);
                break;
            default:
                /* nothing changes with clicks for any other contexts */
                break;
            }
        }
        break;
    case FocusIn:
#ifdef DEBUG_FOCUS
        g_message("FocusIn on client for %lx", client->window);
#endif
        if (client != focus_client) {
            focus_set_client(client);
            frame_adjust_focus(client->frame, TRUE);
        }
        break;
    case FocusOut:
#ifdef DEBUG_FOCUS
        g_message("FocusOut on client for %lx", client->window);
#endif
        /* are we a fullscreen window or a transient of one? (checks layer)
           if we are then we need to be iconified since we are losing focus
         */
        if (client->layer == Layer_Fullscreen && !client->iconic &&
            !client_search_focus_tree_full(client))
            /* iconify fullscreen windows when they and their transients
               aren't focused */
            client_iconify(client, TRUE, TRUE);
        frame_adjust_focus(client->frame, FALSE);
        break;
    case EnterNotify:
        if (client_normal(client)) {
            if (ob_state == State_Starting) {
                /* move it to the top of the focus order */
                guint desktop = client->desktop;
                if (desktop == DESKTOP_ALL) desktop = screen_desktop;
                focus_order[desktop] = g_list_remove(focus_order[desktop],
                                                     client);
                focus_order[desktop] = g_list_prepend(focus_order[desktop],
                                                      client);
            } else if (config_focus_follow) {
#ifdef DEBUG_FOCUS
                g_message("EnterNotify on %lx, focusing window",
                          client->window);
#endif
                client_focus(client);
            }
        }
        break;
    case ConfigureRequest:
        /* compress these */
        while (XCheckTypedWindowEvent(ob_display, client->window,
                                      ConfigureRequest, &ce)) {
            ++i;
            /* XXX if this causes bad things.. we can compress config req's
               with the same mask. */
            e->xconfigurerequest.value_mask |=
                ce.xconfigurerequest.value_mask;
            if (ce.xconfigurerequest.value_mask & CWX)
                e->xconfigurerequest.x = ce.xconfigurerequest.x;
            if (ce.xconfigurerequest.value_mask & CWY)
                e->xconfigurerequest.y = ce.xconfigurerequest.y;
            if (ce.xconfigurerequest.value_mask & CWWidth)
                e->xconfigurerequest.width = ce.xconfigurerequest.width;
            if (ce.xconfigurerequest.value_mask & CWHeight)
                e->xconfigurerequest.height = ce.xconfigurerequest.height;
            if (ce.xconfigurerequest.value_mask & CWBorderWidth)
                e->xconfigurerequest.border_width =
                    ce.xconfigurerequest.border_width;
            if (ce.xconfigurerequest.value_mask & CWStackMode)
                e->xconfigurerequest.detail = ce.xconfigurerequest.detail;
        }

        /* if we are iconic (or shaded (fvwm does this)) ignore the event */
        if (client->iconic || client->shaded) return;

        if (e->xconfigurerequest.value_mask & CWBorderWidth)
            client->border_width = e->xconfigurerequest.border_width;

        /* resize, then move, as specified in the EWMH section 7.7 */
        if (e->xconfigurerequest.value_mask & (CWWidth | CWHeight |
                                               CWX | CWY)) {
            int x, y, w, h;
            Corner corner;
               
            x = (e->xconfigurerequest.value_mask & CWX) ?
                e->xconfigurerequest.x : client->area.x;
            y = (e->xconfigurerequest.value_mask & CWY) ?
                e->xconfigurerequest.y : client->area.y;
            w = (e->xconfigurerequest.value_mask & CWWidth) ?
                e->xconfigurerequest.width : client->area.width;
            h = (e->xconfigurerequest.value_mask & CWHeight) ?
                e->xconfigurerequest.height : client->area.height;
               
            switch (client->gravity) {
            case NorthEastGravity:
            case EastGravity:
                corner = Corner_TopRight;
                break;
            case SouthWestGravity:
            case SouthGravity:
                corner = Corner_BottomLeft;
                break;
            case SouthEastGravity:
                corner = Corner_BottomRight;
                break;
            default:     /* NorthWest, Static, etc */
                corner = Corner_TopLeft;
            }

            client_configure(client, corner, x, y, w, h, FALSE, FALSE);
        }

        if (e->xconfigurerequest.value_mask & CWStackMode) {
            switch (e->xconfigurerequest.detail) {
            case Below:
            case BottomIf:
                stacking_lower(CLIENT_AS_WINDOW(client));
                break;

            case Above:
            case TopIf:
            default:
                stacking_raise(CLIENT_AS_WINDOW(client));
                break;
            }
        }
        break;
    case UnmapNotify:
        if (client->ignore_unmaps) {
            client->ignore_unmaps--;
            break;
        }
        client_unmanage(client);
        break;
    case DestroyNotify:
        client_unmanage(client);
        break;
    case ReparentNotify:
        /* this is when the client is first taken captive in the frame */
        if (e->xreparent.parent == client->frame->plate) break;

        /*
          This event is quite rare and is usually handled in unmapHandler.
          However, if the window is unmapped when the reparent event occurs,
          the window manager never sees it because an unmap event is not sent
          to an already unmapped window.
        */

        /* we don't want the reparent event, put it back on the stack for the
           X server to deal with after we unmanage the window */
        XPutBackEvent(ob_display, e);
     
        client_unmanage(client);
        break;
    case MapRequest:
        g_message("MapRequest for 0x%lx", client->window);
        if (!client->iconic) break; /* this normally doesn't happen, but if it
                                       does, we don't want it! */
        if (screen_showing_desktop)
            screen_show_desktop(FALSE);
        client_iconify(client, FALSE, TRUE);
        if (!client->frame->visible)
            /* if its not visible still, then don't mess with it */
            break;
        if (client->shaded)
            client_shade(client, FALSE);
        client_focus(client);
        stacking_raise(CLIENT_AS_WINDOW(client));
        break;
    case ClientMessage:
        /* validate cuz we query stuff off the client here */
        if (!client_validate(client)) break;
  
        if (e->xclient.format != 32) return;

        msgtype = e->xclient.message_type;
        if (msgtype == prop_atoms.wm_change_state) {
            /* compress changes into a single change */
            while (XCheckTypedWindowEvent(ob_display, e->type,
                                          client->window, &ce)) {
                /* XXX: it would be nice to compress ALL messages of a
                   type, not just messages in a row without other
                   message types between. */
                if (ce.xclient.message_type != msgtype) {
                    XPutBackEvent(ob_display, &ce);
                    break;
                }
                e->xclient = ce.xclient;
            }
            client_set_wm_state(client, e->xclient.data.l[0]);
        } else if (msgtype == prop_atoms.net_wm_desktop) {
            /* compress changes into a single change */
            while (XCheckTypedWindowEvent(ob_display, e->type,
                                          client->window, &ce)) {
                /* XXX: it would be nice to compress ALL messages of a
                   type, not just messages in a row without other
                   message types between. */
                if (ce.xclient.message_type != msgtype) {
                    XPutBackEvent(ob_display, &ce);
                    break;
                }
                e->xclient = ce.xclient;
            }
            if ((unsigned)e->xclient.data.l[0] < screen_num_desktops ||
                (unsigned)e->xclient.data.l[0] == DESKTOP_ALL)
                client_set_desktop(client, (unsigned)e->xclient.data.l[0],
                                   FALSE);
        } else if (msgtype == prop_atoms.net_wm_state) {
            /* can't compress these */
            g_message("net_wm_state %s %ld %ld for 0x%lx",
                      (e->xclient.data.l[0] == 0 ? "Remove" :
                       e->xclient.data.l[0] == 1 ? "Add" :
                       e->xclient.data.l[0] == 2 ? "Toggle" : "INVALID"),
                      e->xclient.data.l[1], e->xclient.data.l[2],
                      client->window);
            client_set_state(client, e->xclient.data.l[0],
                             e->xclient.data.l[1], e->xclient.data.l[2]);
        } else if (msgtype == prop_atoms.net_close_window) {
            g_message("net_close_window for 0x%lx", client->window);
            client_close(client);
        } else if (msgtype == prop_atoms.net_active_window) {
            g_message("net_active_window for 0x%lx", client->window);
            client_activate(client);
        } else if (msgtype == prop_atoms.net_wm_moveresize) {
            g_message("net_wm_moveresize for 0x%lx", client->window);
            if ((Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_topleft ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_top ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_topright ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_right ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_right ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_bottomright ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_bottom ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_bottomleft ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_left ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_move ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_size_keyboard ||
                (Atom)e->xclient.data.l[2] ==
                prop_atoms.net_wm_moveresize_move_keyboard) {

                moveresize_start(client, e->xclient.data.l[0],
                                 e->xclient.data.l[1], e->xclient.data.l[3],
                                 e->xclient.data.l[2]);
            }
        } else if (msgtype == prop_atoms.net_moveresize_window) {
            int oldg = client->gravity;
            int tmpg, x, y, w, h;

            if (e->xclient.data.l[0] & 0xff)
                tmpg = e->xclient.data.l[0] & 0xff;
            else
                tmpg = oldg;

            if (e->xclient.data.l[0] & 1 << 8)
                x = e->xclient.data.l[1];
            else
                x = client->area.x;
            if (e->xclient.data.l[0] & 1 << 9)
                y = e->xclient.data.l[2];
            else
                y = client->area.y;
            if (e->xclient.data.l[0] & 1 << 10)
                w = e->xclient.data.l[3];
            else
                w = client->area.y;
            if (e->xclient.data.l[0] & 1 << 11)
                h = e->xclient.data.l[4];
            else
                h = client->area.y;
            client->gravity = tmpg;
            client_configure(client, Corner_TopLeft, x, y, w, h, TRUE, TRUE);
            client->gravity = oldg;
        }
        break;
    case PropertyNotify:
        /* validate cuz we query stuff off the client here */
        if (!client_validate(client)) break;
  
        /* compress changes to a single property into a single change */
        while (XCheckTypedWindowEvent(ob_display, e->type,
                                      client->window, &ce)) {
            /* XXX: it would be nice to compress ALL changes to a property,
               not just changes in a row without other props between. */
            if (ce.xproperty.atom != e->xproperty.atom) {
                XPutBackEvent(ob_display, &ce);
                break;
            }
        }

        msgtype = e->xproperty.atom;
        if (msgtype == XA_WM_NORMAL_HINTS) {
            client_update_normal_hints(client);
            /* normal hints can make a window non-resizable */
            client_setup_decor_and_functions(client);
        }
        else if (msgtype == XA_WM_HINTS)
            client_update_wmhints(client);
        else if (msgtype == XA_WM_TRANSIENT_FOR) {
            client_update_transient_for(client);
            client_get_type(client);
            /* type may have changed, so update the layer */
            client_calc_layer(client);
            client_setup_decor_and_functions(client);
        }
        else if (msgtype == prop_atoms.net_wm_name ||
                 msgtype == prop_atoms.wm_name ||
                 msgtype == prop_atoms.net_wm_icon_name ||
                 msgtype == prop_atoms.wm_icon_name)
            client_update_title(client);
        else if (msgtype == prop_atoms.wm_class)
            client_update_class(client);
        else if (msgtype == prop_atoms.wm_protocols) {
            client_update_protocols(client);
            client_setup_decor_and_functions(client);
        }
        else if (msgtype == prop_atoms.net_wm_strut)
            client_update_strut(client);
        else if (msgtype == prop_atoms.net_wm_icon ||
                 msgtype == prop_atoms.kwm_win_icon)
            client_update_icons(client);
    default:
        ;
#ifdef SHAPE
        if (extensions_shape && e->type == extensions_shape_event_basep) {
            client->shaped = ((XShapeEvent*)e)->shaped;
            frame_adjust_shape(client->frame);
        }
#endif
    }
}

static void event_handle_menu(Menu *menu, Client *client, XEvent *e)
{
    MenuEntry *entry;

    g_message("EVENT %d", e->type);
    switch (e->type) {
    case ButtonPress:
        g_message("BUTTON PRESS");
        if (e->xbutton.button == 3)
            menu_hide(menu);
        else if (e->xbutton.button == 1) {
            entry = menu_find_entry(menu, e->xbutton.window);
            if (!entry)
                stacking_raise(MENU_AS_WINDOW(menu));
        }
        break;
    case ButtonRelease:
        g_message("BUTTON RELEASED");
        if (!menu->shown) break;

/*        grab_pointer_window(FALSE, None, menu->frame);*/

        if (e->xbutton.button == 1) {
            entry = menu_find_entry(menu, e->xbutton.window);
            if (entry) {
                int junk;
                Window wjunk;
                guint ujunk, b, w, h;
                XGetGeometry(ob_display, e->xbutton.window,
                             &wjunk, &junk, &junk, &w, &h, &b, &ujunk);
                if (e->xbutton.x >= (signed)-b &&
                    e->xbutton.y >= (signed)-b &&
                    e->xbutton.x < (signed)(w+b) &&
                    e->xbutton.y < (signed)(h+b)) {
                    menu_entry_fire(entry);
                }
            }
        }
        
        break;
    case EnterNotify:
    case LeaveNotify:
        g_message("enter/leave");
        entry = menu_find_entry(menu, e->xcrossing.window);
        if (entry) {
            if (menu->mouseover)
                menu->mouseover(entry, e->type == EnterNotify);
            else
                menu_control_mouseover(entry, e->type == EnterNotify);
            
            menu_entry_render(entry);
        }
        break;
    }
}

void event_add_fd_handler(event_fd_handler *h) {
  g_datalist_id_set_data(&fd_handler_list, h->fd, h);
  FD_SET(h->fd, &allset);
  max_fd = MAX(max_fd, h->fd);
}

void find_max_fd_foreach(GQuark n, gpointer data, gpointer max)
{
  *((unsigned int *)max) = MAX(*((unsigned int *)max), n);
}

void event_remove_fd(int n)
{
  int tmpmax = 0;
  FD_CLR(n, &allset);
  g_datalist_id_remove_data(&fd_handler_list, (GQuark)n);
  g_datalist_foreach(&fd_handler_list, find_max_fd_foreach, (gpointer)&tmpmax);
  max_fd = MAX(x_fd, tmpmax);
}

void fd_event_handle_foreach(GQuark n, gpointer data, gpointer user_data)
{
    if (FD_ISSET( (int)n, &selset)) {
        event_fd_handler *h = (event_fd_handler *)data;
        g_assert(h->fd == (int)n);
        h->handler(h->fd, h->data);
    }
}

void fd_event_handle()
{
    g_datalist_foreach(&fd_handler_list, fd_event_handle_foreach, NULL);
}

static void event_handle_dock(Dock *s, XEvent *e)
{
    switch (e->type) {
    case ButtonPress:
        stacking_raise(DOCK_AS_WINDOW(s));
        break;
    case EnterNotify:
        dock_hide(FALSE);
        break;
    case LeaveNotify:
        dock_hide(TRUE);
        break;
    }
}

static void event_handle_dockapp(DockApp *app, XEvent *e)
{
    switch (e->type) {
    case MotionNotify:
        dock_app_drag(app, &e->xmotion);
        break;
    case UnmapNotify:
        if (app->ignore_unmaps) {
            app->ignore_unmaps--;
            break;
        }
        dock_remove(app, TRUE);
        break;
    case DestroyNotify:
        dock_remove(app, FALSE);
        break;
    case ReparentNotify:
        dock_remove(app, FALSE);
        break;
    case ConfigureNotify:
        dock_app_configure(app, e->xconfigure.width, e->xconfigure.height);
        break;
    }
}