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 "debug.h"
  27
  28 #include "actions/all.h"
  29
  30 static void     actions_definition_ref(ObActionsDefinition *def);
  31 static void     actions_definition_unref(ObActionsDefinition *def);
  32 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state);
  33 static void     actions_interactive_end_act();
  34 static ObActionsAct* actions_build_act_from_string(const gchar *name);
  35
  36 static ObActionsAct *interactive_act = NULL;
  37 static guint         interactive_initial_state = 0;
  38
  39 struct _ObActionsDefinition {
  40     guint ref;
  41
  42     gchar *name;
  43
  44     ObActionsDataSetupFunc setup;
  45     ObActionsDataFreeFunc free;
  46     ObActionsRunFunc run;
  47     ObActionsInteractiveInputFunc i_input;
  48     ObActionsInteractiveCancelFunc i_cancel;
  49 };
  50
  51 struct _ObActionsAct {
  52     guint ref;
  53
  54     ObActionsDefinition *def;
  55     gpointer options;
  56 };
  57
  58 static GSList *registered = NULL;
  59
  60
  61 void actions_startup(gboolean reconfig)
  62 {
  63     if (reconfig) return;
  64
  65     action_all_startup();
  66 }
  67
  68 void actions_shutdown(gboolean reconfig)
  69 {
  70     actions_interactive_cancel_act();
  71
  72     if (reconfig) return;
  73
  74     /* free all the registered actions */
  75     while (registered) {
  76         actions_definition_unref(registered->data);
  77         registered = g_slist_delete_link(registered, registered);
  78     }
  79 }
  80
  81 gboolean actions_register(const gchar *name,
  82                           ObActionsDataSetupFunc setup,
  83                           ObActionsDataFreeFunc free,
  84                           ObActionsRunFunc run,
  85                           ObActionsInteractiveInputFunc i_input,
  86                           ObActionsInteractiveCancelFunc i_cancel)
  87 {
  88     GSList *it;
  89     ObActionsDefinition *def;
  90
  91     g_assert(run != NULL);
  92     g_assert((i_input == NULL) == (i_cancel == NULL));
  93
  94     for (it = registered; it; it = g_slist_next(it)) {
  95         def = it->data;
  96         if (!g_ascii_strcasecmp(name, def->name)) /* already registered */
  97             return FALSE;
  98     }
  99
 100     def = g_new(ObActionsDefinition, 1);
 101     def->ref = 1;
 102     def->name = g_strdup(name);
 103     def->setup = setup;
 104     def->free = free;
 105     def->run = run;
 106     def->i_input = i_input;
 107     def->i_cancel = i_cancel;
 108
 109     registered = g_slist_prepend(registered, def);
 110
 111     return TRUE;
 112 }
 113
 114 static void actions_definition_ref(ObActionsDefinition *def)
 115 {
 116     ++def->ref;
 117 }
 118
 119 static void actions_definition_unref(ObActionsDefinition *def)
 120 {
 121     if (def && --def->ref == 0) {
 122         g_free(def->name);
 123         g_free(def);
 124     }
 125 }
 126
 127 ObActionsAct* actions_build_act_from_string(const gchar *name)
 128 {
 129     GSList *it;
 130     ObActionsDefinition *def = NULL;
 131     ObActionsAct *act = NULL;
 132
 133     /* find the requested action */
 134     for (it = registered; it; it = g_slist_next(it)) {
 135         def = it->data;
 136         if (!g_ascii_strcasecmp(name, def->name))
 137             break;
 138         def = NULL;
 139     }
 140
 141     /* if we found the action */
 142     if (def) {
 143         act = g_new(ObActionsAct, 1);
 144         act->ref = 1;
 145         act->def = def;
 146         actions_definition_ref(act->def);
 147         act->options = NULL;
 148     } else
 149         g_message(_("Invalid action '%s' requested. No such action exists."),
 150                   name);
 151
 152     return act;
 153 }
 154
 155 ObActionsAct* actions_parse_string(const gchar *name)
 156 {
 157     ObActionsAct *act = NULL;
 158
 159     if ((act = actions_build_act_from_string(name)))
 160         if (act->def->setup)
 161             act->options = act->def->setup(NULL, NULL, NULL);
 162
 163     return act;
 164 }
 165
 166 ObActionsAct* actions_parse(ObParseInst *i,
 167                             xmlDocPtr doc,
 168                             xmlNodePtr node)
 169 {
 170     gchar *name;
 171     ObActionsAct *act = NULL;
 172
 173     if (parse_attr_string("name", node, &name)) {
 174         if ((act = actions_build_act_from_string(name)))
 175             /* there is more stuff to parse here */
 176             if (act->def->setup)
 177                 act->options = act->def->setup(i, doc, node->xmlChildrenNode);
 178
 179         g_free(name);
 180     }
 181
 182     return act;
 183 }
 184
 185 gboolean actions_act_is_interactive(ObActionsAct *act)
 186 {
 187     return act->def->i_cancel != NULL;
 188 }
 189
 190 void actions_act_ref(ObActionsAct *act)
 191 {
 192     ++act->ref;
 193 }
 194
 195 void actions_act_unref(ObActionsAct *act)
 196 {
 197     if (act && --act->ref == 0) {
 198         /* free the action specific options */
 199         if (act->def->free)
 200             act->def->free(act->options);
 201         /* unref the definition */
 202         actions_definition_unref(act->def);
 203         g_free(act);
 204     }
 205 }
 206
 207 static void actions_setup_data(ObActionsData *data,
 208                                ObUserAction uact,
 209                                guint state,
 210                                gint x,
 211                                gint y,
 212                                gint button,
 213                                ObFrameContext con,
 214                                struct _ObClient *client)
 215 {
 216     data->uact = uact;
 217     data->state = state;
 218     data->x = x;
 219     data->y = y;
 220     data->button = button;
 221     data->context = con;
 222     data->client = client;
 223 }
 224
 225 void actions_run_acts(GSList *acts,
 226                       ObUserAction uact,
 227                       guint state,
 228                       gint x,
 229                       gint y,
 230                       gint button,
 231                       ObFrameContext con,
 232                       struct _ObClient *client)
 233 {
 234     GSList *it;
 235
 236     /* Don't allow saving the initial state when running things from the
 237        menu */
 238     if (uact == OB_USER_ACTION_MENU_SELECTION)
 239         state = 0;
 240     /* If x and y are < 0 then use the current pointer position */
 241     if (x < 0 && y < 0)
 242         screen_pointer_pos(&x, &y);
 243
 244     for (it = acts; it; it = g_slist_next(it)) {
 245         ObActionsData data;
 246         ObActionsAct *act = it->data;
 247         gboolean ok = TRUE;
 248
 249         actions_setup_data(&data, uact, state, x, y, button, con, client);
 250
 251         if (!interactive_act || interactive_act->def != act->def) {
 252             if (actions_act_is_interactive(act)) {
 253                 /* cancel the old one */
 254                 if (interactive_act)
 255                     actions_interactive_cancel_act();
 256                 ok = actions_interactive_begin_act(act, state);
 257             }
 258         }
 259
 260         /* fire the action's run function with this data */
 261         if (ok) {
 262             if (!act->def->run(&data, act->options)) {
 263                 if (actions_act_is_interactive(act))
 264                     actions_interactive_end_act();
 265             } else {
 266                 /* make sure its interactive if it returned TRUE */
 267                 g_assert(act->def->i_cancel && act->def->i_input);
 268
 269                 /* no actions are run after the interactive one */
 270                 break;
 271             }
 272         }
 273     }
 274 }
 275
 276 gboolean actions_interactive_act_running()
 277 {
 278     return interactive_act != NULL;
 279 }
 280
 281 void actions_interactive_cancel_act()
 282 {
 283     if (interactive_act) {
 284         interactive_act->def->i_cancel(interactive_act->options);
 285         actions_interactive_end_act();
 286     }
 287 }
 288
 289 static gboolean actions_interactive_begin_act(ObActionsAct *act, guint state)
 290 {
 291     if (grab_keyboard()) {
 292         interactive_act = act;
 293         actions_act_ref(interactive_act);
 294
 295         interactive_initial_state = state;
 296         return TRUE;
 297     }
 298     else
 299         return FALSE;
 300 }
 301
 302 static void actions_interactive_end_act()
 303 {
 304     if (interactive_act) {
 305         ungrab_keyboard();
 306
 307         actions_act_unref(interactive_act);
 308         interactive_act = NULL;
 309     }
 310 }
 311
 312 gboolean actions_interactive_input_event(XEvent *e)
 313 {
 314     gboolean used = FALSE;
 315     if (interactive_act) {
 316         if (!interactive_act->def->i_input(interactive_initial_state, e,
 317                                            interactive_act->options, &used))
 318         {
 319             used = TRUE; /* if it cancelled the action then it has to of
 320                             been used */
 321             actions_interactive_end_act();
 322         }
 323     }
 324     return used;
 325 }
 326
 327 void actions_client_move(ObActionsData *data, gboolean start)
 328 {
 329     static gulong ignore_start = 0;
 330     if (start)
 331         ignore_start = event_start_ignore_all_enters();
 332     else if (config_focus_follow &&
 333              data->context != OB_FRAME_CONTEXT_CLIENT)
 334     {
 335         if (!data->button && data->client && !config_focus_under_mouse)
 336             event_end_ignore_all_enters(ignore_start);
 337         else {
 338             struct _ObClient *c;
 339
 340             /* usually this is sorta redundant, but with a press action
 341                that moves windows our from under the cursor, the enter
 342                event will come as a GrabNotify which is ignored, so this
 343                makes a fake enter event
 344             */
 345             if ((c = client_under_pointer()) && c != data->client) {
 346                 ob_debug_type(OB_DEBUG_FOCUS,
 347                               "Generating fake enter because we did a "
 348                               "mouse-event action");
 349                 event_enter_client(c);
 350             }
 351         }
 352     }
 353 }