openbox/actions.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    actions.c 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 "focus.h"
  27 #include "openbox.h"
  28 #include "debug.h"
  29
  30 #include "actions/all.h"
  31
  32 static void     actions_definition_ref(ObActionsDefinition *def);
  33 static void     actions_definition_unref(ObActionsDefinition *def);
  34 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state);
  35 static void     actions_interactive_end_act();
  36 static ObActionsAct* actions_build_act_from_string(const gchar *name);
  37
  38 static ObActionsAct *interactive_act = NULL;
  39 static guint         interactive_initial_state = 0;
  40
  41 struct _ObActionsDefinition {
  42     guint ref;
  43
  44     gchar *name;
  45
  46     gboolean canbeinteractive;
  47     union {
  48         ObActionsIDataSetupFunc i;
  49         ObActionsDataSetupFunc n;
  50     } setup;
  51     ObActionsDataFreeFunc free;
  52     ObActionsRunFunc run;
  53     ObActionsShutdownFunc shutdown;
  54     gboolean modifies_focused_window;
  55     gboolean can_stop;
  56 };
  57
  58 struct _ObActionsAct {
  59     guint ref;
  60
  61     ObActionsDefinition *def;
  62     ObActionsIPreFunc i_pre;
  63     ObActionsIInputFunc i_input;
  64     ObActionsICancelFunc i_cancel;
  65     ObActionsIPostFunc i_post;
  66     gpointer options;
  67 };
  68
  69 static GSList *registered = NULL;
  70
  71 void actions_startup(gboolean reconfig)
  72 {
  73     if (reconfig) return;
  74
  75     action_all_startup();
  76 }
  77
  78 void actions_shutdown(gboolean reconfig)
  79 {
  80     actions_interactive_cancel_act();
  81
  82     if (reconfig) return;
  83
  84     /* free all the registered actions */
  85     while (registered) {
  86         ObActionsDefinition *d = registered->data;
  87         if (d->shutdown) d->shutdown();
  88         actions_definition_unref(d);
  89         registered = g_slist_delete_link(registered, registered);
  90     }
  91 }
  92
  93 ObActionsDefinition* do_register(const gchar *name,
  94                                  ObActionsDataFreeFunc free,
  95                                  ObActionsRunFunc run)
  96 {
  97     GSList *it;
  98     ObActionsDefinition *def;
  99
 100     g_assert(run != NULL);
 101
 102     for (it = registered; it; it = g_slist_next(it)) {
 103         def = it->data;
 104         if (!g_ascii_strcasecmp(name, def->name)) /* already registered */
 105             return NULL;
 106     }
 107
 108     def = g_slice_new0(ObActionsDefinition);
 109     def->ref = 1;
 110     def->name = g_strdup(name);
 111     def->free = free;
 112     def->run = run;
 113     def->shutdown = NULL;
 114     def->modifies_focused_window = TRUE;
 115     def->can_stop = FALSE;
 116
 117     registered = g_slist_prepend(registered, def);
 118     return def;
 119 }
 120
 121 gboolean actions_register_i(const gchar *name,
 122                             ObActionsIDataSetupFunc setup,
 123                             ObActionsDataFreeFunc free,
 124                             ObActionsRunFunc run)
 125 {
 126     ObActionsDefinition *def = do_register(name, free, run);
 127     if (def) {
 128         def->canbeinteractive = TRUE;
 129         def->setup.i = setup;
 130     }
 131     return def != NULL;
 132 }
 133
 134 gboolean actions_register(const gchar *name,
 135                           ObActionsDataSetupFunc setup,
 136                           ObActionsDataFreeFunc free,
 137                           ObActionsRunFunc run)
 138 {
 139     ObActionsDefinition *def = do_register(name, free, run);
 140     if (def) {
 141         def->canbeinteractive = FALSE;
 142         def->setup.n = setup;
 143     }
 144     return def != NULL;
 145 }
 146
 147 gboolean actions_set_shutdown(const gchar *name,
 148                               ObActionsShutdownFunc shutdown)
 149 {
 150     GSList *it;
 151     ObActionsDefinition *def;
 152
 153     for (it = registered; it; it = g_slist_next(it)) {
 154         def = it->data;
 155         if (!g_ascii_strcasecmp(name, def->name)) {
 156             def->shutdown = shutdown;
 157             return TRUE;
 158         }
 159     }
 160     return FALSE;
 161 }
 162
 163 gboolean actions_set_modifies_focused_window(const gchar *name,
 164                                              gboolean modifies)
 165 {
 166     GSList *it;
 167     ObActionsDefinition *def;
 168
 169     for (it = registered; it; it = g_slist_next(it)) {
 170         def = it->data;
 171         if (!g_ascii_strcasecmp(name, def->name)) {
 172             def->modifies_focused_window = modifies;
 173             return TRUE;
 174         }
 175     }
 176     return FALSE;
 177 }
 178
 179 gboolean actions_set_can_stop(const gchar *name,
 180                               gboolean can_stop)
 181 {
 182     GSList *it;
 183     ObActionsDefinition *def;
 184
 185     for (it = registered; it; it = g_slist_next(it)) {
 186         def = it->data;
 187         if (!g_ascii_strcasecmp(name, def->name)) {
 188             def->can_stop = can_stop;
 189             return TRUE;
 190         }
 191     }
 192     return FALSE;
 193 }
 194
 195 static void actions_definition_ref(ObActionsDefinition *def)
 196 {
 197     ++def->ref;
 198 }
 199
 200 static void actions_definition_unref(ObActionsDefinition *def)
 201 {
 202     if (def && --def->ref == 0) {
 203         g_free(def->name);
 204         g_slice_free(ObActionsDefinition, def);
 205     }
 206 }
 207
 208 static ObActionsAct* actions_build_act_from_string(const gchar *name)
 209 {
 210     GSList *it;
 211     ObActionsDefinition *def = NULL;
 212     ObActionsAct *act = NULL;
 213
 214     /* find the requested action */
 215     for (it = registered; it; it = g_slist_next(it)) {
 216         def = it->data;
 217         if (!g_ascii_strcasecmp(name, def->name))
 218             break;
 219         def = NULL;
 220     }
 221
 222     /* if we found the action */
 223     if (def) {
 224         act = g_slice_new(ObActionsAct);
 225         act->ref = 1;
 226         act->def = def;
 227         actions_definition_ref(act->def);
 228         act->i_pre = NULL;
 229         act->i_input = NULL;
 230         act->i_cancel = NULL;
 231         act->i_post = NULL;
 232         act->options = NULL;
 233     } else
 234         g_message(_("Invalid action \"%s\" requested. No such action exists."),
 235                   name);
 236
 237     return act;
 238 }
 239
 240 ObActionsAct* actions_parse_string(const gchar *name)
 241 {
 242     ObActionsAct *act = NULL;
 243
 244     if ((act = actions_build_act_from_string(name))) {
 245         if (act->def->canbeinteractive) {
 246             if (act->def->setup.i)
 247                 act->options = act->def->setup.i(NULL,
 248                                                  &act->i_pre,
 249                                                  &act->i_input,
 250                                                  &act->i_cancel,
 251                                                  &act->i_post);
 252         }
 253         else {
 254             if (act->def->setup.n)
 255                 act->options = act->def->setup.n(NULL);
 256         }
 257     }
 258
 259
 260     return act;
 261 }
 262
 263 ObActionsAct* actions_parse(xmlNodePtr node)
 264 {
 265     gchar *name;
 266     ObActionsAct *act = NULL;
 267
 268     if (obt_xml_attr_string(node, "name", &name)) {
 269         if ((act = actions_build_act_from_string(name))) {
 270             /* there is more stuff to parse here */
 271             if (act->def->canbeinteractive) {
 272                 if (act->def->setup.i)
 273                     act->options = act->def->setup.i(node->children,
 274                                                      &act->i_pre,
 275                                                      &act->i_input,
 276                                                      &act->i_cancel,
 277                                                      &act->i_post);
 278             }
 279             else {
 280                 if (act->def->setup.n)
 281                     act->options = act->def->setup.n(node->children);
 282             }
 283         }
 284         g_free(name);
 285     }
 286
 287     return act;
 288 }
 289
 290 gboolean actions_act_is_interactive(ObActionsAct *act)
 291 {
 292     return act->i_input != NULL;
 293 }
 294
 295 void actions_act_ref(ObActionsAct *act)
 296 {
 297     ++act->ref;
 298 }
 299
 300 void actions_act_unref(ObActionsAct *act)
 301 {
 302     if (act && --act->ref == 0) {
 303         /* free the action specific options */
 304         if (act->def->free)
 305             act->def->free(act->options);
 306         /* unref the definition */
 307         actions_definition_unref(act->def);
 308         g_slice_free(ObActionsAct, act);
 309     }
 310 }
 311
 312 static void actions_setup_data(ObActionsData *data,
 313                                ObUserAction uact,
 314                                guint state,
 315                                gint x,
 316                                gint y,
 317                                gint button,
 318                                ObFrameContext con,
 319                                struct _ObClient *client)
 320 {
 321     data->uact = uact;
 322     data->state = state;
 323     data->x = x;
 324     data->y = y;
 325     data->button = button;
 326     data->context = con;
 327     data->client = client;
 328 }
 329
 330 void actions_run_acts(GSList *acts,
 331                       ObUserAction uact,
 332                       guint state,
 333                       gint x,
 334                       gint y,
 335                       gint button,
 336                       ObFrameContext con,
 337                       struct _ObClient *client)
 338 {
 339     GSList *it;
 340     gboolean update_user_time;
 341
 342     /* Don't allow saving the initial state when running things from the
 343        menu */
 344     if (uact == OB_USER_ACTION_MENU_SELECTION)
 345         state = 0;
 346     /* If x and y are < 0 then use the current pointer position */
 347     if (x < 0 && y < 0)
 348         screen_pointer_pos(&x, &y);
 349
 350     update_user_time = FALSE;
 351     for (it = acts; it; it = g_slist_next(it)) {
 352         ObActionsData data;
 353         ObActionsAct *act = it->data;
 354         gboolean ok = TRUE;
 355
 356         actions_setup_data(&data, uact, state, x, y, button, con, client);
 357
 358         /* if they have the same run function, then we'll assume they are
 359            cooperating and not cancel eachother out */
 360         if (!interactive_act || interactive_act->def->run != act->def->run) {
 361             if (actions_act_is_interactive(act)) {
 362                 /* cancel the old one */
 363                 if (interactive_act)
 364                     actions_interactive_cancel_act();
 365                 if (act->i_pre)
 366                     if (!act->i_pre(state, act->options))
 367                         act->i_input = NULL; /* remove the interactivity */
 368             }
 369             /* check again cuz it might have been cancelled */
 370             if (actions_act_is_interactive(act))
 371                 ok = actions_interactive_begin_act(act, state);
 372         }
 373
 374         /* fire the action's run function with this data */
 375         if (ok) {
 376             if (!act->def->run(&data, act->options)) {
 377                 if (actions_act_is_interactive(act)) {
 378                     actions_interactive_end_act();
 379                 }
 380                 if (client && client == focus_client &&
 381                     act->def->modifies_focused_window)
 382                 {
 383                     update_user_time = TRUE;
 384                 }
 385             } else {
 386                 /* make sure its interactive or allowed to stop
 387                    if it returned TRUE */
 388                 g_assert(act->i_input || act->def->can_stop);
 389
 390                 /* no actions are run after the interactive one */
 391                 break;
 392             }
 393         }
 394     }
 395     if (update_user_time)
 396         event_update_user_time();
 397 }
 398
 399 gboolean actions_interactive_act_running(void)
 400 {
 401     return interactive_act != NULL;
 402 }
 403
 404 void actions_interactive_cancel_act(void)
 405 {
 406     if (interactive_act) {
 407         if (interactive_act->i_cancel)
 408             interactive_act->i_cancel(interactive_act->options);
 409         actions_interactive_end_act();
 410     }
 411 }
 412
 413 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state)
 414 {
 415     if (grab_keyboard()) {
 416         interactive_act = act;
 417         actions_act_ref(interactive_act);
 418
 419         interactive_initial_state = state;
 420
 421         /* if using focus_delay, stop the timer now so that focus doesn't go
 422            moving on us, which would kill the action */
 423         event_halt_focus_delay();
 424
 425         return TRUE;
 426     }
 427     else
 428         return FALSE;
 429 }
 430
 431 static void actions_interactive_end_act(void)
 432 {
 433     if (interactive_act) {
 434         ObActionsAct *ia = interactive_act;
 435
 436         /* set this to NULL first so the i_post() function can't cause this to
 437            get called again (if it decides it wants to cancel any ongoing
 438            interactive action). */
 439         interactive_act = NULL;
 440
 441         ungrab_keyboard();
 442
 443         if (ia->i_post)
 444             ia->i_post(ia->options);
 445
 446         actions_act_unref(ia);
 447     }
 448 }
 449
 450 gboolean actions_interactive_input_event(XEvent *e)
 451 {
 452     gboolean used = FALSE;
 453     if (interactive_act) {
 454         if (!interactive_act->i_input(interactive_initial_state, e,
 455                                       grab_input_context(),
 456                                       interactive_act->options, &used))
 457         {
 458             used = TRUE; /* if it cancelled the action then it has to of
 459                             been used */
 460             actions_interactive_end_act();
 461         }
 462     }
 463     return used;
 464 }
 465
 466 void actions_client_move(ObActionsData *data, gboolean start)
 467 {
 468     static gulong ignore_start = 0;
 469     if (start)
 470         ignore_start = event_start_ignore_all_enters();
 471     else if (config_focus_follow &&
 472              data->context != OB_FRAME_CONTEXT_CLIENT)
 473     {
 474         if (data->uact == OB_USER_ACTION_MOUSE_PRESS) {
 475             struct _ObClient *c;
 476
 477             /* usually this is sorta redundant, but with a press action
 478                that moves windows our from under the cursor, the enter
 479                event will come as a GrabNotify which is ignored, so this
 480                makes a fake enter event
 481
 482                don't do this if there is a grab on the pointer.  enter events
 483                are ignored during a grab, so don't force fake ones when they
 484                should be ignored
 485             */
 486             if (!grab_on_pointer()) {
 487                 if ((c = client_under_pointer()) && c != data->client) {
 488                     ob_debug_type(OB_DEBUG_FOCUS,
 489                                   "Generating fake enter because we did a "
 490                                   "mouse-event action");
 491                     event_enter_client(c);
 492                 }
 493                 else if (!c && c != data->client) {
 494                     ob_debug_type(OB_DEBUG_FOCUS,
 495                                   "Generating fake leave because we did a "
 496                                   "mouse-event action");
 497                     event_leave_client(data->client);
 498                 }
 499             }
 500         }
 501         else if (!data->button && !config_focus_under_mouse)
 502             event_end_ignore_all_enters(ignore_start);
 503     }
 504 }