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awesome/keybinding.c

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/*
* keybinding.c - Key bindings configuration management
*
* Copyright © 2008 Julien Danjou <julien@danjou.info>
* Copyright © 2008 Pierre Habouzit <madcoder@debian.org>
*
* 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.
*
*/
/* XStringToKeysym() */
#include <X11/Xlib.h>
#include "keybinding.h"
#include "window.h"
extern awesome_t globalconf;
static struct {
keybinding_array_t by_code;
keybinding_array_t by_sym;
} keys;
DO_LUA_NEW(static, keybinding_t, keybinding, "keybinding", keybinding_ref)
DO_LUA_GC(keybinding_t, keybinding, "keybinding", keybinding_unref)
void keybinding_delete(keybinding_t **kbp)
{
luaL_unref(globalconf.L, LUA_REGISTRYINDEX, (*kbp)->fct);
p_delete(kbp);
}
static int
keybinding_ev_cmp(xcb_keysym_t keysym, xcb_keycode_t keycode,
unsigned long mod, const keybinding_t *k)
{
if (k->keysym) {
if (k->keysym != keysym)
return k->keysym > keysym ? 1 : -1;
}
if (k->keycode) {
if (k->keycode != keycode)
return k->keycode > keycode ? 1 : -1;
}
return k->mod == mod ? 0 : (k->mod > mod ? 1 : -1);
}
static int
keybinding_cmp(const keybinding_t *k1, const keybinding_t *k2)
{
assert ((k1->keysym && k2->keysym) || (k1->keycode && k2->keycode));
assert ((!k1->keysym && !k2->keysym) || (!k1->keycode && !k2->keycode));
if (k1->keysym != k2->keysym)
return k2->keysym > k1->keysym ? 1 : -1;
if (k1->keycode != k2->keycode)
return k2->keycode > k1->keycode ? 1 : -1;
return k1->mod == k2->mod ? 0 : (k2->mod > k1->mod ? 1 : -1);
}
/** Grab key on the root windows.
* \param k The keybinding.
*/
static void
window_root_grabkey(keybinding_t *k)
{
int phys_screen = globalconf.default_screen;
xcb_screen_t *s;
xcb_keycode_t kc;
if((kc = k->keycode)
|| (k->keysym && (kc = xcb_key_symbols_get_keycode(globalconf.keysyms, k->keysym))))
do
{
s = xutil_screen_get(globalconf.connection, phys_screen);
xcb_grab_key(globalconf.connection, true, s->root,
k->mod, kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
xcb_grab_key(globalconf.connection, true, s->root,
k->mod | XCB_MOD_MASK_LOCK, kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
xcb_grab_key(globalconf.connection, true, s->root,
k->mod | globalconf.numlockmask, kc, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
xcb_grab_key(globalconf.connection, true, s->root,
k->mod | globalconf.numlockmask | XCB_MOD_MASK_LOCK, kc, XCB_GRAB_MODE_ASYNC,
XCB_GRAB_MODE_ASYNC);
phys_screen++;
} while(!globalconf.screens_info->xinerama_is_active
&& phys_screen < globalconf.screens_info->nscreen);
}
/** Ungrab key on the root windows.
* \param k The keybinding.
*/
static void
window_root_ungrabkey(keybinding_t *k)
{
int phys_screen = globalconf.default_screen;
xcb_screen_t *s;
xcb_keycode_t kc;
if((kc = k->keycode)
|| (k->keysym && (kc = xcb_key_symbols_get_keycode(globalconf.keysyms, k->keysym))))
do
{
s = xutil_screen_get(globalconf.connection, phys_screen);
xcb_ungrab_key(globalconf.connection, kc, s->root,
k->mod);
xcb_ungrab_key(globalconf.connection, kc, s->root,
k->mod | XCB_MOD_MASK_LOCK);
xcb_ungrab_key(globalconf.connection, kc, s->root,
k->mod | globalconf.numlockmask);
xcb_ungrab_key(globalconf.connection, kc, s->root,
k->mod | globalconf.numlockmask | XCB_MOD_MASK_LOCK);
phys_screen++;
} while(!globalconf.screens_info->xinerama_is_active
&& phys_screen < globalconf.screens_info->nscreen);
}
void
keybinding_register_root(keybinding_t *k)
{
keybinding_array_t *arr = k->keysym ? &keys.by_sym : &keys.by_code;
int l = 0, r = arr->len;
keybinding_ref(&k);
while (l < r) {
int i = (r + l) / 2;
switch (keybinding_cmp(k, arr->tab[i])) {
case -1: /* k < arr->tab[i] */
r = i;
break;
case 0: /* k == arr->tab[i] */
keybinding_unref(&arr->tab[i]);
arr->tab[i] = k;
return;
case 1: /* k > arr->tab[i] */
l = i + 1;
break;
}
}
keybinding_array_splice(arr, r, 0, &k, 1);
window_root_grabkey(k);
}
void
keybinding_unregister_root(keybinding_t **k)
{
keybinding_array_t *arr = (*k)->keysym ? &keys.by_sym : &keys.by_code;
int l = 0, r = arr->len;
while (l < r) {
int i = (r + l) / 2;
switch (keybinding_cmp(*k, arr->tab[i])) {
case -1: /* k < arr->tab[i] */
r = i;
break;
case 0: /* k == arr->tab[i] */
keybinding_array_take(arr, i);
window_root_ungrabkey(*k);
keybinding_unref(k);
return;
case 1: /* k > arr->tab[i] */
l = i + 1;
break;
}
}
}
keybinding_t *
keybinding_find(const xcb_key_press_event_t *ev)
{
const keybinding_array_t *arr = &keys.by_sym;
int l, r, mod = CLEANMASK(ev->state);
xcb_keysym_t keysym;
keysym = xcb_key_symbols_get_keysym(globalconf.keysyms, ev->detail, 0);
again:
l = 0;
r = arr->len;
while (l < r) {
int i = (r + l) / 2;
switch (keybinding_ev_cmp(keysym, ev->detail, mod, arr->tab[i])) {
case -1: /* ev < arr->tab[i] */
r = i;
break;
case 0: /* ev == arr->tab[i] */
return arr->tab[i];
case 1: /* ev > arr->tab[i] */
l = i + 1;
break;
}
}
if (arr != &keys.by_code) {
arr = &keys.by_code;
goto again;
}
return NULL;
}
static void
__luaA_keystore(keybinding_t *key, const char *str)
{
if(!a_strlen(str))
return;
else if(*str != '#')
key->keysym = XStringToKeysym(str);
else
key->keycode = atoi(str + 1);
}
/** Define a global key binding. This key binding will always be available.
* \param L The Lua VM state.
*
* \luastack
* \lparam A table with modifier keys.
* \lparam A key name.
* \lparam A function to execute.
* \lreturn The keybinding.
*/
static int
luaA_keybinding_new(lua_State *L)
{
size_t i, len;
keybinding_t *k;
const char *key;
/* arg 2 is key mod table */
luaA_checktable(L, 2);
/* arg 3 is key */
key = luaL_checkstring(L, 3);
/* arg 4 is cmd to run */
luaA_checkfunction(L, 4);
/* get the last arg as function */
k = p_new(keybinding_t, 1);
__luaA_keystore(k, key);
k->fct = luaL_ref(L, LUA_REGISTRYINDEX);
len = lua_objlen(L, 2);
for(i = 1; i <= len; i++)
{
lua_rawgeti(L, 2, i);
k->mod |= xutil_keymask_fromstr(luaL_checkstring(L, -1));
}
return luaA_keybinding_userdata_new(L, k);
}
/** Add a global key binding. This key binding will always be available.
* \param L The Lua VM state.
*
* \luastack
* \lvalue A keybinding.
*/
static int
luaA_keybinding_add(lua_State *L)
{
keybinding_t **k = luaA_checkudata(L, 1, "keybinding");
keybinding_register_root(*k);
return 0;
}
/** Remove a global key binding.
* \param L The Lua VM state.
*
* \luastack
* \lvalue A keybinding.
*/
static int
luaA_keybinding_remove(lua_State *L)
{
keybinding_t **k = luaA_checkudata(L, 1, "keybinding");
keybinding_unregister_root(k);
return 0;
}
/** Convert a keybinding to a printable string.
* \return A string.
*/
static int
luaA_keybinding_tostring(lua_State *L)
{
keybinding_t **p = luaA_checkudata(L, 1, "keybinding");
lua_pushfstring(L, "[keybinding udata(%p)]", *p);
return 1;
}
const struct luaL_reg awesome_keybinding_methods[] =
{
{ "__call", luaA_keybinding_new },
{ NULL, NULL }
};
const struct luaL_reg awesome_keybinding_meta[] =
{
{"add", luaA_keybinding_add },
{"remove", luaA_keybinding_remove },
{"__tostring", luaA_keybinding_tostring },
{"__gc", luaA_keybinding_gc },
{ NULL, NULL },
};
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