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 #include "lib/global.h"
  30 #include "lib/tty/tty.h"        /* LINES, COLS */
  31 #include "lib/widget.h"
  32
  33 /* TODO: these includes should be removed! */
  34 #include "src/filemanager/layout.h"     /* repaint_screen() */
  35 #include "src/filemanager/midnight.h"   /* midnight_dlg */
  36 #include "src/main.h"           /* midnight_shutdown */
  37
  38 /*** global variables ****************************************************************************/
  39
  40 /*** file scope macro definitions ****************************************************************/
  41
  42 /*** file scope type declarations ****************************************************************/
  43
  44 /*** file scope variables ************************************************************************/
  45
  46 /* List of dialogs: filemanagers, editors, viewers */
  47 static GList *mc_dialogs = NULL;
  48 /* Currently active dialog */
  49 static GList *mc_current = NULL;
  50 /* Is there any dialogs that we have to run after returning to the manager from another dialog */
  51 static gboolean dialog_switch_pending = FALSE;
  52
  53 /*** file scope functions ************************************************************************/
  54 /* --------------------------------------------------------------------------------------------- */
  55
  56 static unsigned char
  57 get_hotkey (int n)
  58 {
  59     return (n <= 9) ? '0' + n : 'a' + n - 10;
  60 }
  61
  62 /* --------------------------------------------------------------------------------------------- */
  63
  64 static void
  65 dialog_switch_goto (GList * dlg)
  66 {
  67     if (mc_current != dlg)
  68     {
  69         Dlg_head *old = (Dlg_head *) mc_current->data;
  70
  71         mc_current = dlg;
  72
  73         if (old == midnight_dlg)
  74         {
  75             /* switch from panels to another dialog (editor, viewer, etc) */
  76             dialog_switch_pending = TRUE;
  77             dialog_switch_process_pending ();
  78         }
  79         else
  80         {
  81             /* switch from editor, viewer, etc to another dialog */
  82             old->state = DLG_SUSPENDED;
  83
  84             if ((Dlg_head *) dlg->data != midnight_dlg)
  85                 /* switch to another editor, viewer, etc */
  86                 /* return to panels before run the required dialog */
  87                 dialog_switch_pending = TRUE;
  88             else
  89                 /* switch to panels */
  90                 do_refresh ();
  91         }
  92     }
  93 }
  94
  95 /* --------------------------------------------------------------------------------------------- */
  96 /*** public functions ****************************************************************************/
  97 /* --------------------------------------------------------------------------------------------- */
  98
  99 void
 100 dialog_switch_add (Dlg_head * h)
 101 {
 102     GList *dlg;
 103
 104     dlg = g_list_find (mc_dialogs, h);
 105
 106     if (dlg != NULL)
 107         mc_current = dlg;
 108     else
 109     {
 110         mc_dialogs = g_list_prepend (mc_dialogs, h);
 111         mc_current = mc_dialogs;
 112     }
 113 }
 114
 115 /* --------------------------------------------------------------------------------------------- */
 116
 117 void
 118 dialog_switch_remove (Dlg_head * h)
 119 {
 120     GList *this;
 121
 122     if ((Dlg_head *) mc_current->data == h)
 123         this = mc_current;
 124     else
 125         this = g_list_find (mc_dialogs, h);
 126
 127     mc_dialogs = g_list_delete_link (mc_dialogs, this);
 128
 129     /* adjust current dialog */
 130     if (top_dlg != NULL)
 131         mc_current = g_list_find (mc_dialogs, (Dlg_head *) top_dlg->data);
 132     else
 133         mc_current = mc_dialogs;
 134 }
 135
 136 /* --------------------------------------------------------------------------------------------- */
 137
 138 size_t
 139 dialog_switch_num (void)
 140 {
 141     return g_list_length (mc_dialogs);
 142 }
 143
 144 /* --------------------------------------------------------------------------------------------- */
 145
 146 void
 147 dialog_switch_next (void)
 148 {
 149     GList *next;
 150
 151     if (midnight_shutdown || mc_current == NULL)
 152         return;
 153
 154     next = g_list_next (mc_current);
 155     if (next == NULL)
 156         next = mc_dialogs;
 157
 158     dialog_switch_goto (next);
 159 }
 160
 161 /* --------------------------------------------------------------------------------------------- */
 162
 163 void
 164 dialog_switch_prev (void)
 165 {
 166     GList *prev;
 167
 168     if (midnight_shutdown || mc_current == NULL)
 169         return;
 170
 171     prev = g_list_previous (mc_current);
 172     if (prev == NULL)
 173         prev = g_list_last (mc_dialogs);
 174
 175     dialog_switch_goto (prev);
 176 }
 177
 178 /* --------------------------------------------------------------------------------------------- */
 179
 180 void
 181 dialog_switch_list (void)
 182 {
 183     const size_t dlg_num = g_list_length (mc_dialogs);
 184     int lines, cols;
 185     Listbox *listbox;
 186     GList *h;
 187     int i = 0;
 188     int rv;
 189
 190     if (midnight_shutdown || mc_current == NULL)
 191         return;
 192
 193     lines = min ((size_t) (LINES * 2 / 3), dlg_num);
 194     cols = COLS * 2 / 3;
 195
 196     listbox = create_listbox_window (lines, cols, _("Screens"), "[Screen selector]");
 197
 198     for (h = mc_dialogs; h != NULL; h = g_list_next (h))
 199     {
 200         Dlg_head *dlg;
 201         char *title;
 202
 203         dlg = (Dlg_head *) h->data;
 204
 205         if ((dlg != NULL) && (dlg->get_title != NULL))
 206             title = dlg->get_title (dlg, listbox->list->widget.cols - 2);       /* FIXME! */
 207         else
 208             title = g_strdup ("");
 209
 210         listbox_add_item (listbox->list, LISTBOX_APPEND_BEFORE, get_hotkey (i++), title, NULL);
 211
 212         g_free (title);
 213     }
 214
 215     listbox_select_entry (listbox->list, dlg_num - 1 - g_list_position (mc_dialogs, mc_current));
 216     rv = run_listbox (listbox);
 217
 218     if (rv >= 0)
 219     {
 220         h = g_list_nth (mc_dialogs, dlg_num - 1 - rv);
 221         dialog_switch_goto (h);
 222     }
 223 }
 224
 225 /* --------------------------------------------------------------------------------------------- */
 226
 227 int
 228 dialog_switch_process_pending (void)
 229 {
 230     int ret = 0;
 231
 232     while (dialog_switch_pending)
 233     {
 234         Dlg_head *h = (Dlg_head *) mc_current->data;
 235
 236         dialog_switch_pending = FALSE;
 237         h->state = DLG_SUSPENDED;
 238         ret = run_dlg (h);
 239         if (h->state == DLG_CLOSED)
 240         {
 241             destroy_dlg (h);
 242             /* return to panels */
 243             if (mc_run_mode == MC_RUN_FULL)
 244             {
 245                 mc_current = g_list_find (mc_dialogs, midnight_dlg);
 246                 update_panels (UP_OPTIMIZE, UP_KEEPSEL);
 247             }
 248         }
 249     }
 250
 251     repaint_screen ();
 252
 253     return ret;
 254 }
 255
 256 /* --------------------------------------------------------------------------------------------- */
 257
 258 void
 259 dialog_switch_got_winch (void)
 260 {
 261     GList *dlg;
 262
 263     for (dlg = mc_dialogs; dlg != NULL; dlg = g_list_next (dlg))
 264         if (dlg != mc_current)
 265             ((Dlg_head *) dlg->data)->winch_pending = TRUE;
 266 }
 267
 268 /* --------------------------------------------------------------------------------------------- */
 269
 270 void
 271 dialog_switch_shutdown (void)
 272 {
 273     while (mc_dialogs != NULL)
 274     {
 275         Dlg_head *dlg = (Dlg_head *) mc_dialogs->data;
 276
 277         run_dlg (dlg);
 278         destroy_dlg (dlg);
 279     }
 280 }
 281
 282 /* --------------------------------------------------------------------------------------------- */