objects/tag.c

   1 /*
   2  * tag.c - tag management
   3  *
   4  * Copyright © 2007-2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "tag.h"
  23 #include "client.h"
  24 #include "ewmh.h"
  25 #include "luaa.h"
  26
  27 /** Tag type */
  28 struct tag
  29 {
  30     LUA_OBJECT_HEADER
  31     /** Tag name */
  32     char *name;
  33     /** true if activated */
  34     bool activated;
  35     /** true if selected */
  36     bool selected;
  37     /** clients in this tag */
  38     client_array_t clients;
  39 };
  40
  41 static lua_class_t tag_class;
  42 LUA_OBJECT_FUNCS(tag_class, tag_t, tag)
  43
  44
  45 void
  46 tag_unref_simplified(tag_t **tag)
  47 {
  48     luaA_object_unref(globalconf.L, *tag);
  49 }
  50
  51 static void
  52 tag_wipe(tag_t *tag)
  53 {
  54     client_array_wipe(&tag->clients);
  55     p_delete(&tag->name);
  56 }
  57
  58 OBJECT_EXPORT_PROPERTY(tag, tag_t, selected)
  59 OBJECT_EXPORT_PROPERTY(tag, tag_t, name)
  60
  61 /** View or unview a tag.
  62  * \param L The Lua VM state.
  63  * \param udx The index of the tag on the stack.
  64  * \param view Set selected or not.
  65  */
  66 static void
  67 tag_view(lua_State *L, int udx, bool view)
  68 {
  69     tag_t *tag = luaA_checkudata(L, udx, &tag_class);
  70     if(tag->selected != view)
  71     {
  72         tag->selected = view;
  73         banning_need_update();
  74         ewmh_update_net_current_desktop();
  75
  76         luaA_object_emit_signal(L, udx, "property::selected", 0);
  77     }
  78 }
  79
  80 static void
  81 tag_client_emit_signal(lua_State *L, tag_t *t, client_t *c, const char *signame)
  82 {
  83     luaA_object_push(L, c);
  84     luaA_object_push(L, t);
  85     /* emit signal on client, with new tag as argument */
  86     luaA_object_emit_signal(L, -2, signame, 1);
  87     /* re push tag */
  88     luaA_object_push(L, t);
  89     /* move tag before client */
  90     lua_insert(L, -2);
  91     luaA_object_emit_signal(L, -2, signame, 1);
  92     /* Remove tag */
  93     lua_pop(L, 1);
  94 }
  95
  96 /** Tag a client with the tag on top of the stack.
  97  * \param c the client to tag
  98  */
  99 void
 100 tag_client(client_t *c)
 101 {
 102     tag_t *t = luaA_object_ref_class(globalconf.L, -1, &tag_class);
 103
 104     /* don't tag twice */
 105     if(is_client_tagged(c, t))
 106     {
 107         luaA_object_unref(globalconf.L, t);
 108         return;
 109     }
 110
 111     client_array_append(&t->clients, c);
 112     ewmh_client_update_desktop(c);
 113     banning_need_update();
 114
 115     tag_client_emit_signal(globalconf.L, t, c, "tagged");
 116 }
 117
 118 /** Untag a client with specified tag.
 119  * \param c the client to tag
 120  * \param t the tag to tag the client with
 121  */
 122 void
 123 untag_client(client_t *c, tag_t *t)
 124 {
 125     for(int i = 0; i < t->clients.len; i++)
 126         if(t->clients.tab[i] == c)
 127         {
 128             client_array_take(&t->clients, i);
 129             banning_need_update();
 130             ewmh_client_update_desktop(c);
 131             tag_client_emit_signal(globalconf.L, t, c, "untagged");
 132             luaA_object_unref(globalconf.L, t);
 133             return;
 134         }
 135 }
 136
 137 /** Check if a client is tagged with the specified tag.
 138  * \param c the client
 139  * \param t the tag
 140  * \return true if the client is tagged with the tag, false otherwise.
 141  */
 142 bool
 143 is_client_tagged(client_t *c, tag_t *t)
 144 {
 145     for(int i = 0; i < t->clients.len; i++)
 146         if(t->clients.tab[i] == c)
 147             return true;
 148
 149     return false;
 150 }
 151
 152 /** Get the index of the first selected tag.
 153  * \return Its index.
 154  */
 155 int
 156 tags_get_first_selected_index(void)
 157 {
 158     foreach(tag, globalconf.tags)
 159         if((*tag)->selected)
 160             return tag_array_indexof(&globalconf.tags, tag);
 161     return 0;
 162 }
 163
 164 /** Create a new tag.
 165  * \param L The Lua VM state.
 166  * \luastack
 167  * \lparam A name.
 168  * \lreturn A new tag object.
 169  */
 170 static int
 171 luaA_tag_new(lua_State *L)
 172 {
 173     return luaA_class_new(L, &tag_class);
 174 }
 175
 176 /** Get or set the clients attached to this tag.
 177  * \param L The Lua VM state.
 178  * \return The number of elements pushed on stack.
 179  * \luastack
 180  * \lparam None or a table of clients to set.
 181  * \lreturn A table with the clients attached to this tags.
 182  */
 183 static int
 184 luaA_tag_clients(lua_State *L)
 185 {
 186     tag_t *tag = luaA_checkudata(L, 1, &tag_class);
 187     client_array_t *clients = &tag->clients;
 188     int i;
 189
 190     if(lua_gettop(L) == 2)
 191     {
 192         luaA_checktable(L, 2);
 193         foreach(c, tag->clients)
 194         {
 195             /* Only untag if we aren't going to add this tag again */
 196             bool found = false;
 197             lua_pushnil(L);
 198             while(lua_next(L, 2))
 199             {
 200                 client_t *tc = luaA_checkudata(L, -1, &client_class);
 201                 /* Pop the value from lua_next */
 202                 lua_pop(L, 1);
 203                 if (tc != *c)
 204                     continue;
 205
 206                 /* Pop the key from lua_next */
 207                 lua_pop(L, 1);
 208                 found = true;
 209                 break;
 210             }
 211             if(!found)
 212                 untag_client(*c, tag);
 213         }
 214         lua_pushnil(L);
 215         while(lua_next(L, 2))
 216         {
 217             client_t *c = luaA_checkudata(L, -1, &client_class);
 218             /* push tag on top of the stack */
 219             lua_pushvalue(L, 1);
 220             tag_client(c);
 221             lua_pop(L, 1);
 222         }
 223     }
 224
 225     lua_createtable(L, clients->len, 0);
 226     for(i = 0; i < clients->len; i++)
 227     {
 228         luaA_object_push(L, clients->tab[i]);
 229         lua_rawseti(L, -2, i + 1);
 230     }
 231
 232     return 1;
 233 }
 234
 235 LUA_OBJECT_EXPORT_PROPERTY(tag, tag_t, name, lua_pushstring)
 236 LUA_OBJECT_EXPORT_PROPERTY(tag, tag_t, selected, lua_pushboolean)
 237 LUA_OBJECT_EXPORT_PROPERTY(tag, tag_t, activated, lua_pushboolean)
 238
 239 /** Set the tag name.
 240  * \param L The Lua VM state.
 241  * \param tag The tag to name.
 242  * \return The number of elements pushed on stack.
 243  */
 244 static int
 245 luaA_tag_set_name(lua_State *L, tag_t *tag)
 246 {
 247     size_t len;
 248     const char *buf = luaL_checklstring(L, -1, &len);
 249     p_delete(&tag->name);
 250     a_iso2utf8(buf, len, &tag->name, NULL);
 251     luaA_object_emit_signal(L, -3, "property::name", 0);
 252     ewmh_update_net_desktop_names();
 253     return 0;
 254 }
 255
 256 /** Set the tag selection status.
 257  * \param L The Lua VM state.
 258  * \param tag The tag to set the selection status for.
 259  * \return The number of elements pushed on stack.
 260  */
 261 static int
 262 luaA_tag_set_selected(lua_State *L, tag_t *tag)
 263 {
 264     tag_view(L, -3, luaA_checkboolean(L, -1));
 265     return 0;
 266 }
 267
 268 /** Set the tag activated status.
 269  * \param L The Lua VM state.
 270  * \param tag The tag to set the activated status for.
 271  * \return The number of elements pushed on stack.
 272  */
 273 static int
 274 luaA_tag_set_activated(lua_State *L, tag_t *tag)
 275 {
 276     bool activated = luaA_checkboolean(L, -1);
 277     if(activated == tag->activated)
 278         return 0;
 279
 280     tag->activated = activated;
 281     if(activated)
 282     {
 283         lua_pushvalue(L, -3);
 284         tag_array_append(&globalconf.tags, luaA_object_ref_class(L, -1, &tag_class));
 285     }
 286     else
 287     {
 288         for (int i = 0; i < globalconf.tags.len; i++)
 289             if(globalconf.tags.tab[i] == tag)
 290             {
 291                 tag_array_take(&globalconf.tags, i);
 292                 break;
 293             }
 294
 295         if (tag->selected)
 296         {
 297             tag->selected = false;
 298             luaA_object_emit_signal(L, -3, "property::selected", 0);
 299             banning_need_update();
 300         }
 301         luaA_object_unref(L, tag);
 302     }
 303     ewmh_update_net_numbers_of_desktop();
 304     ewmh_update_net_desktop_names();
 305
 306     luaA_object_emit_signal(L, -3, "property::activated", 0);
 307
 308     return 0;
 309 }
 310
 311 void
 312 tag_class_setup(lua_State *L)
 313 {
 314     static const struct luaL_Reg tag_methods[] =
 315     {
 316         LUA_CLASS_METHODS(tag)
 317         { "__call", luaA_tag_new },
 318         { NULL, NULL }
 319     };
 320
 321     static const struct luaL_Reg tag_meta[] =
 322     {
 323         LUA_OBJECT_META(tag)
 324         LUA_CLASS_META
 325         { "clients", luaA_tag_clients },
 326         { NULL, NULL },
 327     };
 328
 329     luaA_class_setup(L, &tag_class, "tag", NULL,
 330                      (lua_class_allocator_t) tag_new,
 331                      (lua_class_collector_t) tag_wipe,
 332                      NULL,
 333                      luaA_class_index_miss_property, luaA_class_newindex_miss_property,
 334                      tag_methods, tag_meta);
 335     luaA_class_add_property(&tag_class, "name",
 336                             (lua_class_propfunc_t) luaA_tag_set_name,
 337                             (lua_class_propfunc_t) luaA_tag_get_name,
 338                             (lua_class_propfunc_t) luaA_tag_set_name);
 339     luaA_class_add_property(&tag_class, "selected",
 340                             (lua_class_propfunc_t) luaA_tag_set_selected,
 341                             (lua_class_propfunc_t) luaA_tag_get_selected,
 342                             (lua_class_propfunc_t) luaA_tag_set_selected);
 343     luaA_class_add_property(&tag_class, "activated",
 344                             (lua_class_propfunc_t) luaA_tag_set_activated,
 345                             (lua_class_propfunc_t) luaA_tag_get_activated,
 346                             (lua_class_propfunc_t) luaA_tag_set_activated);
 347
 348     signal_add(&tag_class.signals, "property::name");
 349     signal_add(&tag_class.signals, "property::selected");
 350     signal_add(&tag_class.signals, "property::activated");
 351     signal_add(&tag_class.signals, "request::select");
 352     signal_add(&tag_class.signals, "tagged");
 353     signal_add(&tag_class.signals, "untagged");
 354 }
 355
 356 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80