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/*
* mousegrabber.c - mouse pointer grabbing
*
* Copyright © 2008-2009 Julien Danjou <julien@danjou.info>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <unistd.h>
#include "globalconf.h"
#include "mouse.h"
#include "mousegrabber.h"
#include "luaa.h"
#include "common/xcursor.h"
#include "common/xutil.h"
/** Grab the mouse.
* \param cursor The cursor to use while grabbing.
* \return True if mouse was grabbed.
*/
static bool
mousegrabber_grab(xcb_cursor_t cursor)
{
xcb_window_t root = XCB_NONE;
for(int screen = 0;
screen < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
screen++)
{
int16_t x, y;
uint16_t mask;
root = xutil_screen_get(globalconf.connection, screen)->root;
if(mouse_query_pointer(root, &x, &y, NULL, &mask))
break;
}
for(int i = 1000; i; i--)
{
xcb_grab_pointer_reply_t *grab_ptr_r;
xcb_grab_pointer_cookie_t grab_ptr_c =
xcb_grab_pointer_unchecked(globalconf.connection, false, root,
XCB_EVENT_MASK_BUTTON_PRESS
| XCB_EVENT_MASK_BUTTON_RELEASE
| XCB_EVENT_MASK_POINTER_MOTION,
XCB_GRAB_MODE_ASYNC,
XCB_GRAB_MODE_ASYNC,
root, cursor, XCB_CURRENT_TIME);
if((grab_ptr_r = xcb_grab_pointer_reply(globalconf.connection, grab_ptr_c, NULL)))
{
p_delete(&grab_ptr_r);
return true;
}
usleep(1000);
}
return false;
}
/** Handle mouse motion events.
* \param L Lua stack to push the pointer motion.
* \param x The received mouse event x component.
* \param y The received mouse event y component.
* \param mask The received mouse event bit mask.
*/
void
mousegrabber_handleevent(lua_State *L, int x, int y, uint16_t mask)
{
luaA_mouse_pushstatus(L, x, y, mask);
}
/** Grab the mouse pointer and list motions, calling callback function at each
* motion. The callback function must return a boolean value: true to
* continue grabbing, false to stop.
* The function is called with one argument:
* a table containing modifiers pointer coordinates.
*
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*
* \luastack
*
* \lparam A callback function as described above.
*/
static int
luaA_mousegrabber_run(lua_State *L)
{
if(globalconf.mousegrabber != LUA_REFNIL)
luaL_error(L, "mousegrabber already running");
uint16_t cfont = xcursor_font_fromstr(luaL_checkstring(L, 2));
if(cfont)
{
xcb_cursor_t cursor = xcursor_new(globalconf.connection, cfont);
luaA_registerfct(L, 1, &globalconf.mousegrabber);
if(!mousegrabber_grab(cursor))
{
luaA_unregister(L, &globalconf.mousegrabber);
luaL_error(L, "unable to grab mouse pointer");
}
}
else
luaA_warn(L, "invalid cursor");
return 0;
}
/** Stop grabbing the mouse pointer.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
int
luaA_mousegrabber_stop(lua_State *L)
{
xcb_ungrab_pointer(globalconf.connection, XCB_CURRENT_TIME);
luaA_unregister(L, &globalconf.mousegrabber);
return 0;
}
const struct luaL_reg awesome_mousegrabber_lib[] =
{
{ "run", luaA_mousegrabber_run },
{ "stop", luaA_mousegrabber_stop },
{ NULL, NULL }
};
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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