lib/widget/dialog-switch.c

   1 /*
   2  * Copyright (c) 2009, 2010 Free Software Foundation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  * Original idea and code: Oleg "Olegarch" Konovalov <olegarch@linuxinside.com>
  19  * Written by: 2007 Daniel Borca <dborca@yahoo.com>
  20  *             2010 Andrew Borodin <aborodin@vmail.ru>
  21  */
  22
  23 /** \file dialog-switch.c
  24  *  \brief Source: support of multiply editors and viewers.
  25  */
  26
  27 #include <config.h>
  28
  29 /* If TIOCGWINSZ supported, make it available here, because window resizing code
  30  * depends on it... */
  31 #ifdef HAVE_SYS_IOCTL_H
  32 #include <sys/ioctl.h>
  33 #endif
  34 #include <termios.h>
  35
  36 #include "lib/global.h"
  37 #include "lib/tty/tty.h"        /* LINES, COLS */
  38 #include "lib/tty/win.h"        /* do_enter_ca_mode() */
  39 #include "lib/tty/color.h"      /* tty_set_normal_attrs() */
  40 #include "lib/widget.h"
  41 #include "lib/event.h"
  42
  43 /*** global variables ****************************************************************************/
  44
  45 Dlg_head *midnight_dlg = NULL;
  46
  47 /*** file scope macro definitions ****************************************************************/
  48
  49 /*** file scope type declarations ****************************************************************/
  50
  51 /*** file scope variables ************************************************************************/
  52
  53 /* List of dialogs: filemanagers, editors, viewers */
  54 static GList *mc_dialogs = NULL;
  55 /* Currently active dialog */
  56 static GList *mc_current = NULL;
  57 /* Is there any dialogs that we have to run after returning to the manager from another dialog */
  58 static gboolean dialog_switch_pending = FALSE;
  59
  60 /*** file scope functions ************************************************************************/
  61 /* --------------------------------------------------------------------------------------------- */
  62
  63 static unsigned char
  64 get_hotkey (int n)
  65 {
  66     return (n <= 9) ? '0' + n : 'a' + n - 10;
  67 }
  68
  69 /* --------------------------------------------------------------------------------------------- */
  70
  71 static void
  72 dialog_switch_goto (GList * dlg)
  73 {
  74     if (mc_current != dlg)
  75     {
  76         Dlg_head *old = (Dlg_head *) mc_current->data;
  77
  78         mc_current = dlg;
  79
  80         if (old == midnight_dlg)
  81         {
  82             /* switch from panels to another dialog (editor, viewer, etc) */
  83             dialog_switch_pending = TRUE;
  84             dialog_switch_process_pending ();
  85         }
  86         else
  87         {
  88             /* switch from editor, viewer, etc to another dialog */
  89             old->state = DLG_SUSPENDED;
  90
  91             if ((Dlg_head *) dlg->data != midnight_dlg)
  92                 /* switch to another editor, viewer, etc */
  93                 /* return to panels before run the required dialog */
  94                 dialog_switch_pending = TRUE;
  95             else
  96                 /* switch to panels */
  97                 do_refresh ();
  98         }
  99     }
 100 }
 101
 102 /* --------------------------------------------------------------------------------------------- */
 103
 104 #if defined TIOCGWINSZ
 105 static void
 106 dlg_resize_cb (void *data, void *user_data)
 107 {
 108     Dlg_head *d = data;
 109
 110     (void) user_data;
 111     d->callback (d, NULL, DLG_RESIZE, 0, NULL);
 112 }
 113 #endif
 114
 115 /* --------------------------------------------------------------------------------------------- */
 116 /*** public functions ****************************************************************************/
 117 /* --------------------------------------------------------------------------------------------- */
 118
 119 void
 120 dialog_switch_add (Dlg_head * h)
 121 {
 122     GList *dlg;
 123
 124     dlg = g_list_find (mc_dialogs, h);
 125
 126     if (dlg != NULL)
 127         mc_current = dlg;
 128     else
 129     {
 130         mc_dialogs = g_list_prepend (mc_dialogs, h);
 131         mc_current = mc_dialogs;
 132     }
 133 }
 134
 135 /* --------------------------------------------------------------------------------------------- */
 136
 137 void
 138 dialog_switch_remove (Dlg_head * h)
 139 {
 140     GList *this;
 141
 142     if ((Dlg_head *) mc_current->data == h)
 143         this = mc_current;
 144     else
 145         this = g_list_find (mc_dialogs, h);
 146
 147     mc_dialogs = g_list_delete_link (mc_dialogs, this);
 148
 149     /* adjust current dialog */
 150     if (top_dlg != NULL)
 151         mc_current = g_list_find (mc_dialogs, (Dlg_head *) top_dlg->data);
 152     else
 153         mc_current = mc_dialogs;
 154 }
 155
 156 /* --------------------------------------------------------------------------------------------- */
 157
 158 size_t
 159 dialog_switch_num (void)
 160 {
 161     return g_list_length (mc_dialogs);
 162 }
 163
 164 /* --------------------------------------------------------------------------------------------- */
 165
 166 void
 167 dialog_switch_next (void)
 168 {
 169     GList *next;
 170
 171     if (mc_global.widget.midnight_shutdown || mc_current == NULL)
 172         return;
 173
 174     next = g_list_next (mc_current);
 175     if (next == NULL)
 176         next = mc_dialogs;
 177
 178     dialog_switch_goto (next);
 179 }
 180
 181 /* --------------------------------------------------------------------------------------------- */
 182
 183 void
 184 dialog_switch_prev (void)
 185 {
 186     GList *prev;
 187
 188     if (mc_global.widget.midnight_shutdown || mc_current == NULL)
 189         return;
 190
 191     prev = g_list_previous (mc_current);
 192     if (prev == NULL)
 193         prev = g_list_last (mc_dialogs);
 194
 195     dialog_switch_goto (prev);
 196 }
 197
 198 /* --------------------------------------------------------------------------------------------- */
 199
 200 void
 201 dialog_switch_list (void)
 202 {
 203     const size_t dlg_num = g_list_length (mc_dialogs);
 204     int lines, cols;
 205     Listbox *listbox;
 206     GList *h;
 207     int i = 0;
 208     int rv;
 209
 210     if (mc_global.widget.midnight_shutdown || mc_current == NULL)
 211         return;
 212
 213     lines = min ((size_t) (LINES * 2 / 3), dlg_num);
 214     cols = COLS * 2 / 3;
 215
 216     listbox = create_listbox_window (lines, cols, _("Screens"), "[Screen selector]");
 217
 218     for (h = mc_dialogs; h != NULL; h = g_list_next (h))
 219     {
 220         Dlg_head *dlg;
 221         char *title;
 222
 223         dlg = (Dlg_head *) h->data;
 224
 225         if ((dlg != NULL) && (dlg->get_title != NULL))
 226             title = dlg->get_title (dlg, listbox->list->widget.cols - 2);       /* FIXME! */
 227         else
 228             title = g_strdup ("");
 229
 230         listbox_add_item (listbox->list, LISTBOX_APPEND_BEFORE, get_hotkey (i++), title, NULL);
 231
 232         g_free (title);
 233     }
 234
 235     listbox_select_entry (listbox->list, dlg_num - 1 - g_list_position (mc_dialogs, mc_current));
 236     rv = run_listbox (listbox);
 237
 238     if (rv >= 0)
 239     {
 240         h = g_list_nth (mc_dialogs, dlg_num - 1 - rv);
 241         dialog_switch_goto (h);
 242     }
 243 }
 244
 245 /* --------------------------------------------------------------------------------------------- */
 246
 247 int
 248 dialog_switch_process_pending (void)
 249 {
 250     int ret = 0;
 251
 252     while (dialog_switch_pending)
 253     {
 254         Dlg_head *h = (Dlg_head *) mc_current->data;
 255
 256         dialog_switch_pending = FALSE;
 257         h->state = DLG_SUSPENDED;
 258         ret = run_dlg (h);
 259         if (h->state == DLG_CLOSED)
 260         {
 261             destroy_dlg (h);
 262             /* return to panels */
 263             if (mc_global.mc_run_mode == MC_RUN_FULL)
 264             {
 265                 mc_current = g_list_find (mc_dialogs, midnight_dlg);
 266                 mc_event_raise (MCEVENT_GROUP_FILEMANAGER, "update_panels", NULL);
 267             }
 268         }
 269     }
 270
 271     repaint_screen ();
 272
 273     return ret;
 274 }
 275
 276 /* --------------------------------------------------------------------------------------------- */
 277
 278 void
 279 dialog_switch_got_winch (void)
 280 {
 281     GList *dlg;
 282
 283     for (dlg = mc_dialogs; dlg != NULL; dlg = g_list_next (dlg))
 284         if (dlg != mc_current)
 285             ((Dlg_head *) dlg->data)->winch_pending = TRUE;
 286 }
 287
 288 /* --------------------------------------------------------------------------------------------- */
 289
 290 void
 291 dialog_switch_shutdown (void)
 292 {
 293     while (mc_dialogs != NULL)
 294     {
 295         Dlg_head *dlg = (Dlg_head *) mc_dialogs->data;
 296
 297         run_dlg (dlg);
 298         destroy_dlg (dlg);
 299     }
 300 }
 301
 302 /* --------------------------------------------------------------------------------------------- */
 303
 304 void
 305 clr_scr (void)
 306 {
 307     tty_set_normal_attrs ();
 308     tty_fill_region (0, 0, LINES, COLS, ' ');
 309     tty_refresh ();
 310 }
 311
 312 /* --------------------------------------------------------------------------------------------- */
 313
 314 void
 315 repaint_screen (void)
 316 {
 317     do_refresh ();
 318     tty_refresh ();
 319 }
 320
 321 /* --------------------------------------------------------------------------------------------- */
 322
 323 void
 324 dialog_change_screen_size (void)
 325 {
 326     mc_global.tty.winch_flag = FALSE;
 327 #if defined(HAVE_SLANG) || NCURSES_VERSION_MAJOR >= 4
 328 #if defined TIOCGWINSZ
 329
 330 #ifndef NCURSES_VERSION
 331     tty_noraw_mode ();
 332     tty_reset_screen ();
 333 #endif
 334     tty_low_level_change_screen_size ();
 335 #ifdef HAVE_SLANG
 336     /* XSI Curses spec states that portable applications shall not invoke
 337      * initscr() more than once.  This kludge could be done within the scope
 338      * of the specification by using endwin followed by a refresh (in fact,
 339      * more than one curses implementation does this); it is guaranteed to work
 340      * only with slang.
 341      */
 342     SLsmg_init_smg ();
 343     do_enter_ca_mode ();
 344     tty_keypad (TRUE);
 345     tty_nodelay (FALSE);
 346 #endif
 347
 348     /* Inform all suspending dialogs */
 349     dialog_switch_got_winch ();
 350     /* Inform all running dialogs */
 351     g_list_foreach (top_dlg, (GFunc) dlg_resize_cb, NULL);
 352
 353     /* Now, force the redraw */
 354     repaint_screen ();
 355
 356 #endif /* TIOCGWINSZ */
 357 #endif /* defined(HAVE_SLANG) || NCURSES_VERSION_MAJOR >= 4 */
 358 }
 359
 360 /* --------------------------------------------------------------------------------------------- */