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/* flippers.c -- viewport edge flipping mechanism
$Id: flippers.c 4301 2008-11-19 20:45:08Z chrisb $
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"
static Window edge_left, edge_right, edge_top, edge_bottom;
DEFSYM(left, "left");
DEFSYM(right, "right");
DEFSYM(top, "top");
DEFSYM(bottom, "bottom");
DEFSYM(enter_flipper_hook, "enter-flipper-hook");
DEFSYM(leave_flipper_hook, "leave-flipper-hook");
DEFUN("enable-flippers", Fenable_flippers, Senable_flippers, (void), rep_Subr0)
{
XMapRaised (dpy, edge_left);
XMapRaised (dpy, edge_right);
XMapRaised (dpy, edge_top);
XMapRaised (dpy, edge_bottom);
return Qt;
}
DEFUN("disable-flippers", Fdisable_flippers, Sdisable_flippers,
(void), rep_Subr0)
{
XUnmapWindow (dpy, edge_left);
XUnmapWindow (dpy, edge_right);
XUnmapWindow (dpy, edge_top);
XUnmapWindow (dpy, edge_bottom);
return Qt;
}
static repv
flipper_to_sym (Window w)
{
if (w == edge_left)
return Qleft;
else if (w == edge_right)
return Qright;
else if (w == edge_top)
return Qtop;
else if (w == edge_bottom)
return Qbottom;
else
return Qnil;
}
static Window
sym_to_flipper (repv sym)
{
if (sym == Qleft)
return edge_left;
else if (sym == Qright)
return edge_right;
else if (sym == Qtop)
return edge_top;
else if (sym == Qbottom)
return edge_bottom;
else
return 0;
}
static void
event_handler (XEvent *ev)
{
switch (ev->xany.type)
{
repv sym;
case EnterNotify:
case LeaveNotify:
sym = flipper_to_sym (ev->xany.window);
Fcall_hook ((ev->xany.type == EnterNotify)
? Qenter_flipper_hook : Qleave_flipper_hook,
Fcons (sym, Qnil), Qnil);
break;
}
}
DEFUN("flippers-after-restacking", Fflippers_after_restacking,
Sflippers_after_restacking, (void), rep_Subr0)
{
/* Must keep edge windows raised so they always get the pointer */
XRaiseWindow (dpy, edge_left);
XRaiseWindow (dpy, edge_right);
XRaiseWindow (dpy, edge_top);
XRaiseWindow (dpy, edge_bottom);
return Qt;
}
/* DL hooks / initialisation */
static Window
create_flipper (Window parent, int x, int y, int width, int height)
{
Window w;
XSetWindowAttributes wa;
wa.override_redirect = True;
w = XCreateWindow (dpy, parent, x, y, width, height, 0, 0,
InputOnly, preferred_visual, CWOverrideRedirect, &wa);
if (w != 0)
{
XSelectInput (dpy, w, EnterWindowMask | LeaveWindowMask
| VisibilityChangeMask);
register_event_handler (w, event_handler);
}
return w;
}
repv
rep_dl_init (void)
{
repv tem = rep_push_structure ("sawfish.wm.util.flippers");
rep_ADD_SUBR(Senable_flippers);
rep_ADD_SUBR(Sdisable_flippers);
rep_ADD_SUBR(Sflippers_after_restacking);
rep_INTERN (left);
rep_INTERN (right);
rep_INTERN (top);
rep_INTERN (bottom);
rep_INTERN_SPECIAL (enter_flipper_hook);
rep_INTERN_SPECIAL (leave_flipper_hook);
if (!batch_mode_p ())
{
edge_left = create_flipper (root_window, 0, 0, 1, screen_height);
edge_right = create_flipper (root_window, screen_width - 1, 0,
1, screen_height);
edge_top = create_flipper (root_window, 0, 0, screen_width, 1);
edge_bottom = create_flipper (root_window, 0, screen_height - 1,
screen_width, 1);
add_hook (Qafter_restacking_hook, rep_VAL(&Sflippers_after_restacking));
Fenable_flippers ();
}
return rep_pop_structure (tem);
}
|
