openbox/actions.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    actions.h for the Openbox window manager
   4    Copyright (c) 2007        Dana Jansens
   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    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "actions.h"
  20 #include "gettext.h"
  21 #include "grab.h"
  22 #include "screen.h"
  23 #include "event.h"
  24 #include "config.h"
  25 #include "client.h"
  26 #include "openbox.h"
  27 #include "debug.h"
  28
  29 #include "actions/all.h"
  30
  31 static void     actions_definition_ref(ObActionsDefinition *def);
  32 static void     actions_definition_unref(ObActionsDefinition *def);
  33 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state);
  34 static void     actions_interactive_end_act();
  35 static ObActionsAct* actions_build_act_from_string(const gchar *name);
  36
  37 static ObActionsAct *interactive_act = NULL;
  38 static guint         interactive_initial_state = 0;
  39
  40 struct _ObActionsDefinition {
  41     guint ref;
  42
  43     gchar *name;
  44
  45     gboolean canbeinteractive;
  46     union {
  47         ObActionsIDataSetupFunc i;
  48         ObActionsDataSetupFunc n;
  49     } setup;
  50     ObActionsDataFreeFunc free;
  51     ObActionsRunFunc run;
  52 };
  53
  54 struct _ObActionsAct {
  55     guint ref;
  56
  57     ObActionsDefinition *def;
  58     ObActionsIPreFunc i_pre;
  59     ObActionsIInputFunc i_input;
  60     ObActionsICancelFunc i_cancel;
  61     ObActionsIPostFunc i_post;
  62     gpointer options;
  63 };
  64
  65 static GSList *registered = NULL;
  66
  67 void actions_startup(gboolean reconfig)
  68 {
  69     if (reconfig) return;
  70
  71     action_all_startup();
  72 }
  73
  74 void actions_shutdown(gboolean reconfig)
  75 {
  76     actions_interactive_cancel_act();
  77
  78     if (reconfig) return;
  79
  80     /* free all the registered actions */
  81     while (registered) {
  82         actions_definition_unref(registered->data);
  83         registered = g_slist_delete_link(registered, registered);
  84     }
  85 }
  86
  87 ObActionsDefinition* do_register(const gchar *name,
  88                                  ObActionsDataFreeFunc free,
  89                                  ObActionsRunFunc run)
  90 {
  91     GSList *it;
  92     ObActionsDefinition *def;
  93
  94     g_assert(run != NULL);
  95
  96     for (it = registered; it; it = g_slist_next(it)) {
  97         def = it->data;
  98         if (!g_ascii_strcasecmp(name, def->name)) /* already registered */
  99             return NULL;
 100     }
 101
 102     def = g_new(ObActionsDefinition, 1);
 103     def->ref = 1;
 104     def->name = g_strdup(name);
 105     def->free = free;
 106     def->run = run;
 107
 108     registered = g_slist_prepend(registered, def);
 109     return def;
 110 }
 111
 112 gboolean actions_register_i(const gchar *name,
 113                             ObActionsIDataSetupFunc setup,
 114                             ObActionsDataFreeFunc free,
 115                             ObActionsRunFunc run)
 116 {
 117     ObActionsDefinition *def = do_register(name, free, run);
 118     if (def) {
 119         def->canbeinteractive = TRUE;
 120         def->setup.i = setup;
 121     }
 122     return def != NULL;
 123 }
 124
 125 gboolean actions_register(const gchar *name,
 126                           ObActionsDataSetupFunc setup,
 127                           ObActionsDataFreeFunc free,
 128                           ObActionsRunFunc run)
 129 {
 130     ObActionsDefinition *def = do_register(name, free, run);
 131     if (def) {
 132         def->canbeinteractive = FALSE;
 133         def->setup.n = setup;
 134     }
 135     return def != NULL;
 136 }
 137
 138 static void actions_definition_ref(ObActionsDefinition *def)
 139 {
 140     ++def->ref;
 141 }
 142
 143 static void actions_definition_unref(ObActionsDefinition *def)
 144 {
 145     if (def && --def->ref == 0) {
 146         g_free(def->name);
 147         g_free(def);
 148     }
 149 }
 150
 151 static ObActionsAct* actions_build_act_from_string(const gchar *name)
 152 {
 153     GSList *it;
 154     ObActionsDefinition *def = NULL;
 155     ObActionsAct *act = NULL;
 156
 157     /* find the requested action */
 158     for (it = registered; it; it = g_slist_next(it)) {
 159         def = it->data;
 160         if (!g_ascii_strcasecmp(name, def->name))
 161             break;
 162         def = NULL;
 163     }
 164
 165     /* if we found the action */
 166     if (def) {
 167         act = g_new(ObActionsAct, 1);
 168         act->ref = 1;
 169         act->def = def;
 170         actions_definition_ref(act->def);
 171         act->i_pre = NULL;
 172         act->i_input = NULL;
 173         act->i_cancel = NULL;
 174         act->i_post = NULL;
 175         act->options = NULL;
 176     } else
 177         g_message(_("Invalid action \"%s\" requested. No such action exists."),
 178                   name);
 179
 180     return act;
 181 }
 182
 183 ObActionsAct* actions_parse_string(const gchar *name)
 184 {
 185     ObActionsAct *act = NULL;
 186
 187     if ((act = actions_build_act_from_string(name))) {
 188         if (act->def->canbeinteractive) {
 189             if (act->def->setup.i)
 190                 act->options = act->def->setup.i(NULL,
 191                                                  &act->i_pre,
 192                                                  &act->i_input,
 193                                                  &act->i_cancel,
 194                                                  &act->i_post);
 195         }
 196         else {
 197             if (act->def->setup.n)
 198                 act->options = act->def->setup.n(NULL);
 199         }
 200     }
 201
 202
 203     return act;
 204 }
 205
 206 ObActionsAct* actions_parse(xmlNodePtr node)
 207 {
 208     gchar *name;
 209     ObActionsAct *act = NULL;
 210
 211     if (obt_parse_attr_string(node, "name", &name)) {
 212         if ((act = actions_build_act_from_string(name))) {
 213             /* there is more stuff to parse here */
 214             if (act->def->canbeinteractive) {
 215                 if (act->def->setup.i)
 216                     act->options = act->def->setup.i(node->children,
 217                                                      &act->i_pre,
 218                                                      &act->i_input,
 219                                                      &act->i_cancel,
 220                                                      &act->i_post);
 221             }
 222             else {
 223                 if (act->def->setup.n)
 224                     act->options = act->def->setup.n(node->children);
 225             }
 226         }
 227         g_free(name);
 228     }
 229
 230     return act;
 231 }
 232
 233 gboolean actions_act_is_interactive(ObActionsAct *act)
 234 {
 235     return act->i_input != NULL;
 236 }
 237
 238 void actions_act_ref(ObActionsAct *act)
 239 {
 240     ++act->ref;
 241 }
 242
 243 void actions_act_unref(ObActionsAct *act)
 244 {
 245     if (act && --act->ref == 0) {
 246         /* free the action specific options */
 247         if (act->def->free)
 248             act->def->free(act->options);
 249         /* unref the definition */
 250         actions_definition_unref(act->def);
 251         g_free(act);
 252     }
 253 }
 254
 255 static void actions_setup_data(ObActionsData *data,
 256                                ObUserAction uact,
 257                                guint state,
 258                                gint x,
 259                                gint y,
 260                                gint button,
 261                                ObFrameContext con,
 262                                struct _ObClient *client)
 263 {
 264     data->uact = uact;
 265     data->state = state;
 266     data->x = x;
 267     data->y = y;
 268     data->button = button;
 269     data->context = con;
 270     data->client = client;
 271 }
 272
 273 void actions_run_acts(GSList *acts,
 274                       ObUserAction uact,
 275                       guint state,
 276                       gint x,
 277                       gint y,
 278                       gint button,
 279                       ObFrameContext con,
 280                       struct _ObClient *client)
 281 {
 282     GSList *it;
 283
 284     /* Don't allow saving the initial state when running things from the
 285        menu */
 286     if (uact == OB_USER_ACTION_MENU_SELECTION)
 287         state = 0;
 288     /* If x and y are < 0 then use the current pointer position */
 289     if (x < 0 && y < 0)
 290         screen_pointer_pos(&x, &y);
 291
 292     for (it = acts; it; it = g_slist_next(it)) {
 293         ObActionsData data;
 294         ObActionsAct *act = it->data;
 295         gboolean ok = TRUE;
 296
 297         actions_setup_data(&data, uact, state, x, y, button, con, client);
 298
 299         /* if they have the same run function, then we'll assume they are
 300            cooperating and not cancel eachother out */
 301         if (!interactive_act || interactive_act->def->run != act->def->run) {
 302             if (actions_act_is_interactive(act)) {
 303                 /* cancel the old one */
 304                 if (interactive_act)
 305                     actions_interactive_cancel_act();
 306                 if (act->i_pre)
 307                     act->i_pre(act->options);
 308                 ok = actions_interactive_begin_act(act, state);
 309             }
 310         }
 311
 312         /* fire the action's run function with this data */
 313         if (ok) {
 314             if (!act->def->run(&data, act->options)) {
 315                 if (actions_act_is_interactive(act))
 316                     actions_interactive_end_act();
 317             } else {
 318                 /* make sure its interactive if it returned TRUE */
 319                 g_assert(act->i_input);
 320
 321                 /* no actions are run after the interactive one */
 322                 break;
 323             }
 324         }
 325     }
 326 }
 327
 328 gboolean actions_interactive_act_running(void)
 329 {
 330     return interactive_act != NULL;
 331 }
 332
 333 void actions_interactive_cancel_act(void)
 334 {
 335     if (interactive_act) {
 336         if (interactive_act->i_cancel)
 337             interactive_act->i_cancel(interactive_act->options);
 338         actions_interactive_end_act();
 339     }
 340 }
 341
 342 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state)
 343 {
 344     if (grab_keyboard()) {
 345         interactive_act = act;
 346         actions_act_ref(interactive_act);
 347
 348         interactive_initial_state = state;
 349
 350         /* if using focus_delay, stop the timer now so that focus doesn't go
 351            moving on us, which would kill the action */
 352         event_halt_focus_delay();
 353
 354         return TRUE;
 355     }
 356     else
 357         return FALSE;
 358 }
 359
 360 static void actions_interactive_end_act(void)
 361 {
 362     if (interactive_act) {
 363         ungrab_keyboard();
 364
 365         if (interactive_act->i_post)
 366             interactive_act->i_post(interactive_act->options);
 367
 368         actions_act_unref(interactive_act);
 369         interactive_act = NULL;
 370     }
 371 }
 372
 373 gboolean actions_interactive_input_event(XEvent *e)
 374 {
 375     gboolean used = FALSE;
 376     if (interactive_act) {
 377         if (!interactive_act->i_input(interactive_initial_state, e,
 378                                       interactive_act->options, &used))
 379         {
 380             used = TRUE; /* if it cancelled the action then it has to of
 381                             been used */
 382             actions_interactive_end_act();
 383         }
 384     }
 385     return used;
 386 }
 387
 388 void actions_client_move(ObActionsData *data, gboolean start)
 389 {
 390     static gulong ignore_start = 0;
 391     if (start)
 392         ignore_start = event_start_ignore_all_enters();
 393     else if (config_focus_follow &&
 394              data->context != OB_FRAME_CONTEXT_CLIENT)
 395     {
 396         if (data->uact == OB_USER_ACTION_MOUSE_PRESS) {
 397             struct _ObClient *c;
 398
 399             /* usually this is sorta redundant, but with a press action
 400                that moves windows our from under the cursor, the enter
 401                event will come as a GrabNotify which is ignored, so this
 402                makes a fake enter event
 403
 404                don't do this if there is a grab on the pointer.  enter events
 405                are ignored during a grab, so don't force fake ones when they
 406                should be ignored
 407             */
 408             if ((c = client_under_pointer()) && c != data->client &&
 409                 !grab_on_pointer())
 410             {
 411                 ob_debug_type(OB_DEBUG_FOCUS,
 412                               "Generating fake enter because we did a "
 413                               "mouse-event action");
 414                 event_enter_client(c);
 415             }
 416         }
 417         else if (!data->button && !config_focus_under_mouse)
 418             event_end_ignore_all_enters(ignore_start);
 419     }
 420 }