141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*
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* keygrabber.c - key 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 "keygrabber.h"
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#include "objects/key.h"
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#include "luaa.h"
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#include "keyresolv.h"
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#include "common/xutil.h"
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/** Grab the keyboard.
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* \return True if keyboard was grabbed.
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*/
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static bool
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keygrabber_grab(void)
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{
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int i;
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xcb_grab_keyboard_reply_t *xgb;
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for(i = 1000; i; i--)
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{
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if((xgb = xcb_grab_keyboard_reply(globalconf.connection,
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xcb_grab_keyboard(globalconf.connection, true,
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globalconf.screen->root,
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XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC,
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XCB_GRAB_MODE_ASYNC),
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NULL)))
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{
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p_delete(&xgb);
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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 keypress event.
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* \param L Lua stack to push the key pressed.
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* \param e Received XKeyEvent.
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* \return True if a key was successfully get, false otherwise.
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*/
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bool
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keygrabber_handlekpress(lua_State *L, xcb_key_press_event_t *e)
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{
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/* transfer event (keycode + modifiers) to keysym */
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xcb_keysym_t ksym = keyresolv_get_keysym(e->detail, e->state);
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/* convert keysym to string */
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char buf[MAX(MB_LEN_MAX, 32)];
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if(!keyresolv_keysym_to_string(ksym, buf, countof(buf)))
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return false;
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luaA_pushmodifiers(L, e->state);
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lua_pushstring(L, buf);
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switch(e->response_type)
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{
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case XCB_KEY_PRESS:
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lua_pushliteral(L, "press");
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break;
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case XCB_KEY_RELEASE:
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lua_pushliteral(L, "release");
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break;
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}
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return true;
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}
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/** Grab keyboard and read pressed keys, calling callback function at each key
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* pressed. 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 3 arguments:
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* a table containing modifiers keys, a string with the key pressed and a
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* string with either "press" or "release" to indicate the event type.
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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_keygrabber_run(lua_State *L)
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{
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if(globalconf.keygrabber != LUA_REFNIL)
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luaL_error(L, "keygrabber already running");
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luaA_registerfct(L, 1, &globalconf.keygrabber);
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if(!keygrabber_grab())
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{
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luaA_unregister(L, &globalconf.keygrabber);
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luaL_error(L, "unable to grab keyboard");
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}
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return 0;
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}
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/** Stop grabbing the keyboard.
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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_keygrabber_stop(lua_State *L)
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{
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xcb_ungrab_keyboard(globalconf.connection, XCB_CURRENT_TIME);
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luaA_unregister(L, &globalconf.keygrabber);
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return 0;
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}
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const struct luaL_reg awesome_keygrabber_lib[] =
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{
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{ "run", luaA_keygrabber_run },
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{ "stop", luaA_keygrabber_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:encoding=utf-8:textwidth=80
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