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awesome/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"
#include "luaa.h"
/** Tag type */
struct tag
{
LUA_OBJECT_HEADER
/** Tag name */
char *name;
/** Screen */
screen_t *screen;
/** true if selected */
bool selected;
/** clients in this tag */
client_array_t clients;
};
static lua_class_t tag_class;
LUA_OBJECT_FUNCS(tag_class, tag_t, tag)
void
tag_unref_simplified(tag_t **tag)
{
luaA_object_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 = luaA_checkudata(L, 1, &tag_class);
client_array_wipe(&tag->clients);
p_delete(&tag->name);
return luaA_object_gc(L);
}
OBJECT_EXPORT_PROPERTY(tag, tag_t, selected)
OBJECT_EXPORT_PROPERTY(tag, tag_t, name)
/** View or unview a tag.
* \param L The Lua VM state.
* \param udx The index of the tag on the stack.
* \param view Set visible or not.
*/
static void
tag_view(lua_State *L, int udx, bool view)
{
tag_t *tag = luaA_checkudata(L, udx, &tag_class);
if(tag->selected != view)
{
tag->selected = view;
if(tag->screen)
{
int screen_index = screen_array_indexof(&globalconf.screens, tag->screen);
banning_need_update(tag->screen);
ewmh_update_net_current_desktop(screen_virttophys(screen_index));
if(globalconf.hooks.tags != LUA_REFNIL)
{
lua_pushnumber(globalconf.L, screen_index + 1);
luaA_object_push(globalconf.L, tag);
if(view)
lua_pushliteral(globalconf.L, "select");
else
lua_pushliteral(globalconf.L, "unselect");
luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.tags, 3, 0);
}
}
luaA_object_emit_signal(L, udx, "property::selected", 0);
}
}
/** Append a tag to a screen.
* \param L The Lua VM state.
* \param udx The tag index on the stack.
* \param s The screen.
*/
void
tag_append_to_screen(lua_State *L, int udx, screen_t *s)
{
tag_t *tag = luaA_checkudata(globalconf.L, udx, &tag_class);
/* can't attach a tag twice */
if(tag->screen)
{
lua_remove(L, udx);
return;
}
int screen_index = screen_array_indexof(&globalconf.screens, s);
int phys_screen = screen_virttophys(screen_index);
tag->screen = s;
tag_array_append(&s->tags, luaA_object_ref_class(globalconf.L, udx, &tag_class));
ewmh_update_net_numbers_of_desktop(phys_screen);
ewmh_update_net_desktop_names(phys_screen);
luaA_object_push(globalconf.L, tag);
luaA_object_emit_signal(L, -1, "property::screen", 0);
lua_pop(L, 1);
/* call hook */
if(globalconf.hooks.tags != LUA_REFNIL)
{
lua_pushnumber(globalconf.L, screen_index + 1);
luaA_object_push(globalconf.L, tag);
lua_pushliteral(globalconf.L, "add");
luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.tags, 3, 0);
}
luaA_object_push(globalconf.L, tag);
screen_emit_signal(globalconf.L, s, "tag::attach", 1);
}
/** Remove a tag from screen. Tag must be on a screen and have no clients.
* \param tag The tag to remove.
*/
void
tag_remove_from_screen(tag_t *tag)
{
if(!tag->screen)
return;
int screen_index = screen_array_indexof(&globalconf.screens, tag->screen);
int phys_screen = screen_virttophys(screen_index);
tag_array_t *tags = &tag->screen->tags;
for(int i = 0; i < tags->len; i++)
if(tags->tab[i] == tag)
{
tag_array_take(tags, i);
break;
}
/* tag was selected? If so, reban */
if(tag->selected)
banning_need_update(tag->screen);
ewmh_update_net_numbers_of_desktop(phys_screen);
ewmh_update_net_desktop_names(phys_screen);
/* call hook */
if(globalconf.hooks.tags != LUA_REFNIL)
{
lua_pushnumber(globalconf.L, screen_index + 1);
luaA_object_push(globalconf.L, tag);
lua_pushliteral(globalconf.L, "remove");
luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.tags, 3, 0);
}
screen_t *s = tag->screen;
tag->screen = NULL;
luaA_object_push(globalconf.L, tag);
luaA_object_emit_signal(globalconf.L, -1, "property::screen", 0);
screen_emit_signal(globalconf.L, s, "tag::detach", 1);
luaA_object_unref(globalconf.L, tag);
}
static void
tag_client_emit_signal(lua_State *L, tag_t *t, client_t *c, const char *signame)
{
luaA_object_push(L, c);
luaA_object_push(L, t);
/* emit signal on client, with new tag as argument */
luaA_object_emit_signal(L, -2, signame, 1);
/* re push tag */
luaA_object_push(L, t);
/* move tag before client */
lua_insert(L, -2);
luaA_object_emit_signal(L, -2, signame, 1);
/* Remove tag */
lua_pop(L, 1);
}
/** 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 = luaA_object_ref_class(globalconf.L, -1, &tag_class);
/* don't tag twice */
if(is_client_tagged(c, t))
{
luaA_object_unref(globalconf.L, t);
return;
}
client_array_append(&t->clients, c);
ewmh_client_update_desktop(c);
banning_need_update((c)->screen);
/* call hook */
if(globalconf.hooks.tagged != LUA_REFNIL)
{
luaA_object_push(globalconf.L, c);
luaA_object_push(globalconf.L, t);
luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.tagged, 2, 0);
}
tag_client_emit_signal(globalconf.L, t, c, "tagged");
}
/** 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_array_take(&t->clients, i);
banning_need_update((c)->screen);
ewmh_client_update_desktop(c);
/* call hook */
if(globalconf.hooks.tagged != LUA_REFNIL)
{
luaA_object_push(globalconf.L, c);
luaA_object_push(globalconf.L, t);
luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.tagged, 2, 0);
}
tag_client_emit_signal(globalconf.L, t, c, "untagged");
luaA_object_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 index of the first selected tag.
* \param screen Screen.
* \return Its index.
*/
int
tags_get_first_selected_index(screen_t *screen)
{
foreach(tag, screen->tags)
if((*tag)->selected)
return tag_array_indexof(&screen->tags, tag);
return 0;
}
/** 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)
foreach(tag, target->screen->tags)
{
luaA_object_push(globalconf.L, *tag);
tag_view(globalconf.L, -1, *tag == target);
lua_pop(globalconf.L, 1);
}
}
/** View only a tag, selected by its index.
* \param screen Screen.
* \param dindex The index.
*/
void
tag_view_only_byindex(screen_t *screen, int dindex)
{
tag_array_t *tags = &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)
{
if(lua_isstring(L, 2))
{
/* compat code */
luaA_deprecate(L, "new syntax");
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);
return 1;
}
return luaA_class_new(L, &tag_class);
}
/** 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 = luaA_checkudata(L, 1, &tag_class);
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++)
{
luaA_object_push(L, clients->tab[i]);
lua_rawseti(L, -2, i + 1);
}
return 1;
}
LUA_OBJECT_EXPORT_PROPERTY(tag, tag_t, name, lua_pushstring)
LUA_OBJECT_EXPORT_PROPERTY(tag, tag_t, selected, lua_pushboolean)
/** Set the tag name.
* \param L The Lua VM state.
* \param tag The tag to name.
* \return The number of elements pushed on stack.
*/
static int
luaA_tag_set_name(lua_State *L, tag_t *tag)
{
size_t len;
const char *buf = luaL_checklstring(L, -1, &len);
p_delete(&tag->name);
a_iso2utf8(buf, len, &tag->name, NULL);
luaA_object_emit_signal(L, -3, "property::name", 0);
return 0;
}
/** Set the tag selection status.
* \param L The Lua VM state.
* \param tag The tag to set the selection status for.
* \return The number of elements pushed on stack.
*/
static int
luaA_tag_set_selected(lua_State *L, tag_t *tag)
{
tag_view(L, -3, luaA_checkboolean(L, -1));
return 0;
}
/** Set the tag screen.
* \param L The Lua VM state.
* \param tag The tag to set the screen for.
* \return The number of elements pushed on stack.
*/
static int
luaA_tag_set_screen(lua_State *L, tag_t *tag)
{
int screen;
if(lua_isnil(L, -1))
screen = -1;
else
{
screen = luaL_checknumber(L, -1) - 1;
luaA_checkscreen(screen);
}
tag_remove_from_screen(tag);
if(screen != -1)
tag_append_to_screen(L, -3, &globalconf.screens.tab[screen]);
return 0;
}
/** Get the tag screen.
* \param L The Lua VM state.
* \param tag The tag to get the screen for.
* \return The number of elements pushed on stack.
*/
static int
luaA_tag_get_screen(lua_State *L, tag_t *tag)
{
if(!tag->screen)
return 0;
lua_pushnumber(L, screen_array_indexof(&globalconf.screens, tag->screen) + 1);
return 1;
}
void
tag_class_setup(lua_State *L)
{
static const struct luaL_reg tag_methods[] =
{
LUA_CLASS_METHODS(tag)
{ "__call", luaA_tag_new },
{ NULL, NULL }
};
static const struct luaL_reg tag_meta[] =
{
LUA_OBJECT_META(tag)
LUA_CLASS_META
{ "clients", luaA_tag_clients },
{ "__gc", luaA_tag_gc },
{ NULL, NULL },
};
luaA_class_setup(L, &tag_class, "tag", (lua_class_allocator_t) tag_new,
luaA_class_index_miss_property, luaA_class_newindex_miss_property,
tag_methods, tag_meta);
luaA_class_add_property(&tag_class, A_TK_NAME,
(lua_class_propfunc_t) luaA_tag_set_name,
(lua_class_propfunc_t) luaA_tag_get_name,
(lua_class_propfunc_t) luaA_tag_set_name);
luaA_class_add_property(&tag_class, A_TK_SCREEN,
(lua_class_propfunc_t) NULL,
(lua_class_propfunc_t) luaA_tag_get_screen,
(lua_class_propfunc_t) luaA_tag_set_screen);
luaA_class_add_property(&tag_class, A_TK_SELECTED,
(lua_class_propfunc_t) luaA_tag_set_selected,
(lua_class_propfunc_t) luaA_tag_get_selected,
(lua_class_propfunc_t) luaA_tag_set_selected);
}
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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