/* Support of multiply editors and viewers. Original idea and code: Oleg "Olegarch" Konovalov Copyright (c) 2009, 2010, 2011 The Free Software Foundation Written by: Daniel Borca , 2007 Andrew Borodin , 2010 This file is part of the Midnight Commander. The Midnight Commander is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. The Midnight Commander is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /** \file dialog-switch.c * \brief Source: support of multiply editors and viewers. */ #include /* If TIOCGWINSZ supported, make it available here, because window resizing code * depends on it... */ #ifdef HAVE_SYS_IOCTL_H #include #endif #include #include "lib/global.h" #include "lib/tty/tty.h" /* LINES, COLS */ #include "lib/tty/win.h" /* do_enter_ca_mode() */ #include "lib/tty/color.h" /* tty_set_normal_attrs() */ #include "lib/widget.h" #include "lib/event.h" /*** global variables ****************************************************************************/ Dlg_head *midnight_dlg = NULL; /*** file scope macro definitions ****************************************************************/ /*** file scope type declarations ****************************************************************/ /*** file scope variables ************************************************************************/ /* List of dialogs: filemanagers, editors, viewers */ static GList *mc_dialogs = NULL; /* Currently active dialog */ static GList *mc_current = NULL; /* Is there any dialogs that we have to run after returning to the manager from another dialog */ static gboolean dialog_switch_pending = FALSE; /*** file scope functions ************************************************************************/ /* --------------------------------------------------------------------------------------------- */ static unsigned char get_hotkey (int n) { return (n <= 9) ? '0' + n : 'a' + n - 10; } /* --------------------------------------------------------------------------------------------- */ static void dialog_switch_goto (GList * dlg) { if (mc_current != dlg) { Dlg_head *old = (Dlg_head *) mc_current->data; mc_current = dlg; if (old == midnight_dlg) { /* switch from panels to another dialog (editor, viewer, etc) */ dialog_switch_pending = TRUE; dialog_switch_process_pending (); } else { /* switch from editor, viewer, etc to another dialog */ old->state = DLG_SUSPENDED; if ((Dlg_head *) dlg->data != midnight_dlg) /* switch to another editor, viewer, etc */ /* return to panels before run the required dialog */ dialog_switch_pending = TRUE; else /* switch to panels */ do_refresh (); } } } /* --------------------------------------------------------------------------------------------- */ #if defined TIOCGWINSZ static void dlg_resize_cb (void *data, void *user_data) { Dlg_head *d = data; (void) user_data; d->callback (d, NULL, DLG_RESIZE, 0, NULL); } #endif /* --------------------------------------------------------------------------------------------- */ /*** public functions ****************************************************************************/ /* --------------------------------------------------------------------------------------------- */ void dialog_switch_add (Dlg_head * h) { GList *dlg; dlg = g_list_find (mc_dialogs, h); if (dlg != NULL) mc_current = dlg; else { mc_dialogs = g_list_prepend (mc_dialogs, h); mc_current = mc_dialogs; } } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_remove (Dlg_head * h) { GList *this; if ((Dlg_head *) mc_current->data == h) this = mc_current; else this = g_list_find (mc_dialogs, h); mc_dialogs = g_list_delete_link (mc_dialogs, this); /* adjust current dialog */ if (top_dlg != NULL) mc_current = g_list_find (mc_dialogs, (Dlg_head *) top_dlg->data); else mc_current = mc_dialogs; } /* --------------------------------------------------------------------------------------------- */ size_t dialog_switch_num (void) { return g_list_length (mc_dialogs); } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_next (void) { GList *next; if (mc_global.widget.midnight_shutdown || mc_current == NULL) return; next = g_list_next (mc_current); if (next == NULL) next = mc_dialogs; dialog_switch_goto (next); } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_prev (void) { GList *prev; if (mc_global.widget.midnight_shutdown || mc_current == NULL) return; prev = g_list_previous (mc_current); if (prev == NULL) prev = g_list_last (mc_dialogs); dialog_switch_goto (prev); } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_list (void) { const size_t dlg_num = g_list_length (mc_dialogs); int lines, cols; Listbox *listbox; GList *h; int i = 0; int rv; if (mc_global.widget.midnight_shutdown || mc_current == NULL) return; lines = min ((size_t) (LINES * 2 / 3), dlg_num); cols = COLS * 2 / 3; listbox = create_listbox_window (lines, cols, _("Screens"), "[Screen selector]"); for (h = mc_dialogs; h != NULL; h = g_list_next (h)) { Dlg_head *dlg; char *title; dlg = (Dlg_head *) h->data; if ((dlg != NULL) && (dlg->get_title != NULL)) title = dlg->get_title (dlg, listbox->list->widget.cols - 2); /* FIXME! */ else title = g_strdup (""); listbox_add_item (listbox->list, LISTBOX_APPEND_BEFORE, get_hotkey (i++), title, NULL); g_free (title); } listbox_select_entry (listbox->list, dlg_num - 1 - g_list_position (mc_dialogs, mc_current)); rv = run_listbox (listbox); if (rv >= 0) { h = g_list_nth (mc_dialogs, dlg_num - 1 - rv); dialog_switch_goto (h); } } /* --------------------------------------------------------------------------------------------- */ int dialog_switch_process_pending (void) { int ret = 0; while (dialog_switch_pending) { Dlg_head *h = (Dlg_head *) mc_current->data; dialog_switch_pending = FALSE; h->state = DLG_SUSPENDED; ret = run_dlg (h); if (h->state == DLG_CLOSED) { destroy_dlg (h); /* return to panels */ if (mc_global.mc_run_mode == MC_RUN_FULL) { mc_current = g_list_find (mc_dialogs, midnight_dlg); mc_event_raise (MCEVENT_GROUP_FILEMANAGER, "update_panels", NULL); } } } repaint_screen (); return ret; } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_got_winch (void) { GList *dlg; for (dlg = mc_dialogs; dlg != NULL; dlg = g_list_next (dlg)) if (dlg != mc_current) ((Dlg_head *) dlg->data)->winch_pending = TRUE; } /* --------------------------------------------------------------------------------------------- */ void dialog_switch_shutdown (void) { while (mc_dialogs != NULL) { Dlg_head *dlg = (Dlg_head *) mc_dialogs->data; run_dlg (dlg); destroy_dlg (dlg); } } /* --------------------------------------------------------------------------------------------- */ void clr_scr (void) { tty_set_normal_attrs (); tty_fill_region (0, 0, LINES, COLS, ' '); tty_refresh (); } /* --------------------------------------------------------------------------------------------- */ void repaint_screen (void) { do_refresh (); tty_refresh (); } /* --------------------------------------------------------------------------------------------- */ void mc_refresh (void) { #ifdef WITH_BACKGROUND if (mc_global.we_are_background) return; #endif /* WITH_BACKGROUND */ if (!mc_global.tty.winch_flag) tty_refresh (); else { /* if winch was caugth, we should do not only redraw screen, but reposition/resize all */ dialog_change_screen_size (); } } /* --------------------------------------------------------------------------------------------- */ void dialog_change_screen_size (void) { mc_global.tty.winch_flag = FALSE; #if defined(HAVE_SLANG) || NCURSES_VERSION_MAJOR >= 4 #if defined TIOCGWINSZ #ifndef NCURSES_VERSION tty_noraw_mode (); tty_reset_screen (); #endif tty_change_screen_size (); #ifdef HAVE_SLANG /* XSI Curses spec states that portable applications shall not invoke * initscr() more than once. This kludge could be done within the scope * of the specification by using endwin followed by a refresh (in fact, * more than one curses implementation does this); it is guaranteed to work * only with slang. */ SLsmg_init_smg (); do_enter_ca_mode (); tty_keypad (TRUE); tty_nodelay (FALSE); #endif /* Inform all suspending dialogs */ dialog_switch_got_winch (); /* Inform all running dialogs */ g_list_foreach (top_dlg, (GFunc) dlg_resize_cb, NULL); /* Now, force the redraw */ repaint_screen (); #endif /* TIOCGWINSZ */ #endif /* defined(HAVE_SLANG) || NCURSES_VERSION_MAJOR >= 4 */ } /* --------------------------------------------------------------------------------------------- */