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