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tag.c
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tag.c
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/*
* tag.c - tag management
*
* Copyright © 2007-2008 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 "screen.h"
#include "tag.h"
#include "client.h"
#include "ewmh.h"
#include "widget.h"
DO_LUA_TOSTRING(tag_t, tag, "tag")
void
tag_unref_simplified(tag_t **tag)
{
tag_unref(globalconf.L, *tag);
}
/** Garbage collect a tag.
* \param L The Lua VM state.
* \return 0.
*/
static int
luaA_tag_gc(lua_State *L)
{
tag_t *tag = luaL_checkudata(L, 1, "tag");
client_array_wipe(&tag->clients);
p_delete(&tag->name);
return 0;
}
/** View or unview a tag.
* \param tag the tag
* \param view set visible or not
*/
static void
tag_view(tag_t *tag, bool view)
{
tag->selected = view;
ewmh_update_net_current_desktop(screen_virttophys(tag->screen));
globalconf.screens[tag->screen].need_arrange = true;
}
/** Append a tag which on top of the stack to a screen.
* \param screen the screen id
*/
void
tag_append_to_screen(screen_t *s)
{
int phys_screen = screen_virttophys(s->index);
tag_t *tag = tag_ref(globalconf.L);
tag->screen = s->index;
tag_array_append(&s->tags, tag);
ewmh_update_net_numbers_of_desktop(phys_screen);
ewmh_update_net_desktop_names(phys_screen);
ewmh_update_workarea(phys_screen);
/* call hook */
if(globalconf.hooks.tags != LUA_REFNIL)
{
lua_pushnumber(globalconf.L, s->index + 1);
tag_push(globalconf.L, tag);
lua_pushliteral(globalconf.L, "add");
luaA_dofunction(globalconf.L, globalconf.hooks.tags, 3, 0);
}
}
/** Remove a tag from screen. Tag must be on a screen and have no clients.
* \param tag The tag to remove.
*/
static void
tag_remove_from_screen(tag_t *tag)
{
int screen = tag->screen;
int phys_screen = screen_virttophys(tag->screen);
tag_array_t *tags = &globalconf.screens[tag->screen].tags;
for(int i = 0; i < tags->len; i++)
if(tags->tab[i] == tag)
{
tag_array_take(tags, i);
break;
}
ewmh_update_net_numbers_of_desktop(phys_screen);
ewmh_update_net_desktop_names(phys_screen);
ewmh_update_workarea(phys_screen);
tag->screen = SCREEN_UNDEF;
/* call hook */
if(globalconf.hooks.tags != LUA_REFNIL)
{
lua_pushnumber(globalconf.L, screen + 1);
tag_push(globalconf.L, tag);
lua_pushliteral(globalconf.L, "remove");
luaA_dofunction(globalconf.L, globalconf.hooks.tags, 3, 0);
}
tag_unref(globalconf.L, tag);
}
/** Tag a client with the tag on top of the stack.
* \param c the client to tag
*/
void
tag_client(client_t *c)
{
tag_t *t = tag_ref(globalconf.L);
/* don't tag twice */
if(is_client_tagged(c, t))
return;
client_array_append(&t->clients, c);
ewmh_client_update_desktop(c);
client_need_arrange(c);
/* call hook */
if(globalconf.hooks.tagged != LUA_REFNIL)
{
client_push(globalconf.L, c);
tag_push(globalconf.L, t);
luaA_dofunction(globalconf.L, globalconf.hooks.tagged, 2, 0);
}
}
/** Untag a client with specified tag.
* \param c the client to tag
* \param t the tag to tag the client with
*/
void
untag_client(client_t *c, tag_t *t)
{
for(int i = 0; i < t->clients.len; i++)
if(t->clients.tab[i] == c)
{
client_need_arrange(c);
client_array_take(&t->clients, i);
ewmh_client_update_desktop(c);
/* call hook */
if(globalconf.hooks.tagged != LUA_REFNIL)
{
client_push(globalconf.L, c);
tag_push(globalconf.L, t);
luaA_dofunction(globalconf.L, globalconf.hooks.tagged, 2, 0);
}
tag_unref(globalconf.L, t);
return;
}
}
/** Check if a client is tagged with the specified tag.
* \param c the client
* \param t the tag
* \return true if the client is tagged with the tag, false otherwise.
*/
bool
is_client_tagged(client_t *c, tag_t *t)
{
for(int i = 0; i < t->clients.len; i++)
if(t->clients.tab[i] == c)
return true;
return false;
}
/** Get the current tags for the specified screen.
* Returned pointer must be p_delete'd after.
* \param screen screen id
* \return a double pointer of tag list finished with a NULL element
*/
tag_t **
tags_get_current(int screen)
{
tag_array_t *tags = &globalconf.screens[screen].tags;
tag_t **out = p_new(tag_t *, tags->len + 1);
int n = 0;
for(int i = 0; i < tags->len; i++)
if(tags->tab[i]->selected)
out[n++] = tags->tab[i];
return out;
}
/** Set a tag to be the only one viewed.
* \param target the tag to see
*/
static void
tag_view_only(tag_t *target)
{
if(target)
{
tag_array_t *tags = &globalconf.screens[target->screen].tags;
for(int i = 0; i < tags->len; i++)
tag_view(tags->tab[i], tags->tab[i] == target);
}
}
/** View only a tag, selected by its index.
* \param screen screen id
* \param dindex the index
*/
void
tag_view_only_byindex(int screen, int dindex)
{
tag_array_t *tags = &globalconf.screens[screen].tags;
if(dindex < 0 || dindex >= tags->len)
return;
tag_view_only(tags->tab[dindex]);
}
/** Create a new tag.
* \param L The Lua VM state.
* \luastack
* \lparam A name.
* \lreturn A new tag object.
*/
static int
luaA_tag_new(lua_State *L)
{
size_t len;
const char *name = luaL_checklstring(L, 2, &len);
tag_t *tag = tag_new(globalconf.L);
a_iso2utf8(name, len, &tag->name, NULL);
/* to avoid error */
tag->screen = SCREEN_UNDEF;
return 1;
}
/** Get or set the clients attached to this tag.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lparam None or a table of clients to set.
* \lreturn A table with the clients attached to this tags.
*/
static int
luaA_tag_clients(lua_State *L)
{
tag_t *tag = luaL_checkudata(L, 1, "tag");
client_array_t *clients = &tag->clients;
int i;
if(lua_gettop(L) == 2)
{
luaA_checktable(L, 2);
foreach(c, tag->clients)
untag_client(*c, tag);
lua_pushnil(L);
while(lua_next(L, 2))
{
client_t *c = luaA_client_checkudata(L, -1);
/* push tag on top of the stack */
lua_pushvalue(L, 1);
tag_client(c);
lua_pop(L, 1);
}
}
lua_createtable(L, clients->len, 0);
for(i = 0; i < clients->len; i++)
{
client_push(L, clients->tab[i]);
lua_rawseti(L, -2, i + 1);
}
return 1;
}
/** Tag object.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lfield name Tag name.
* \lfield screen Screen number of the tag.
* \lfield layout Tag layout.
* \lfield selected True if the client is selected to be viewed.
*/
static int
luaA_tag_index(lua_State *L)
{
size_t len;
tag_t *tag = luaL_checkudata(L, 1, "tag");
const char *attr;
if(luaA_usemetatable(L, 1, 2))
return 1;
attr = luaL_checklstring(L, 2, &len);
switch(a_tokenize(attr, len))
{
case A_TK_NAME:
lua_pushstring(L, tag->name);
break;
case A_TK_SCREEN:
if(tag->screen == SCREEN_UNDEF)
return 0;
lua_pushnumber(L, tag->screen + 1);
break;
case A_TK_SELECTED:
lua_pushboolean(L, tag->selected);
break;
default:
return 0;
}
return 1;
}
/** Tag newindex.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
*/
static int
luaA_tag_newindex(lua_State *L)
{
size_t len;
tag_t *tag = luaL_checkudata(L, 1, "tag");
const char *attr = luaL_checklstring(L, 2, &len);
switch(a_tokenize(attr, len))
{
int screen;
case A_TK_NAME:
{
const char *buf = luaL_checklstring(L, 3, &len);
p_delete(&tag->name);
a_iso2utf8(buf, len, &tag->name, NULL);
}
break;
case A_TK_SCREEN:
if(!lua_isnil(L, 3))
{
screen = luaL_checknumber(L, 3) - 1;
luaA_checkscreen(screen);
}
else
screen = SCREEN_UNDEF;
if(tag->screen != SCREEN_UNDEF)
tag_remove_from_screen(tag);
if(screen != SCREEN_UNDEF)
{
/* push tag on top of the stack */
lua_pushvalue(L, 1);
tag_append_to_screen(&globalconf.screens[screen]);
}
break;
case A_TK_SELECTED:
if(tag->screen != SCREEN_UNDEF)
tag_view(tag, luaA_checkboolean(L, 3));
return 0;
default:
return 0;
}
if(tag->screen != SCREEN_UNDEF && tag->selected)
globalconf.screens[tag->screen].need_arrange = true;
return 0;
}
const struct luaL_reg awesome_tag_methods[] =
{
{ "__call", luaA_tag_new },
{ NULL, NULL }
};
const struct luaL_reg awesome_tag_meta[] =
{
{ "clients", luaA_tag_clients },
{ "__index", luaA_tag_index },
{ "__newindex", luaA_tag_newindex },
{ "__gc", luaA_tag_gc },
{ "__tostring", luaA_tag_tostring },
{ NULL, NULL },
};
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80