layout.c

ReactOS是一些高手根据Windows XP的内核编写出的类XP。内核实现机理和API函数调用几乎相同。甚至可以兼容XP的程序。喜欢研究系统内核的人可以看一看。

    endwin ();
#endif
    low_level_change_screen_size ();
    check_split ();
#ifndef NCURSES_VERSION
    /* 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.
     */
    init_curses ();
#endif
    setup_panels ();
    if (current_dlg == view_dlg)
	view_adjust_size (view_dlg);
#ifdef USE_INTERNAL_EDIT
    if (current_dlg == edit_dlg)
	edit_adjust_size (edit_dlg);
#endif

#ifdef RESIZABLE_MENUBAR
	menubar_arrange(the_menubar);
#endif

    /* Now, force the redraw */
    do_refresh ();
    touchwin (stdscr);
#endif /* TIOCGWINSZ && !SCO_FLAVOR */
#endif /* defined(HAVE_SLANG) || NCURSES_VERSION_MAJOR >= 4 */
    winch_flag = 0;
}
#endif /* HAVE_X */

extern int verbose;
static int ok_to_refresh = 1;

void use_dash (int flag)
{
    if (flag)
	ok_to_refresh++;
    else
	ok_to_refresh--;
}

void set_hintbar(char *str)
{
#ifndef HAVE_X
    if (xterm_flag && xterm_hintbar) {
        fprintf (stderr, "\33]0;mc - %s\7", str);
    } else
#endif
    {
        label_set_text (the_hint, str);
        if (ok_to_refresh > 0)
	    refresh();
    }
}

void print_vfs_message(char *msg, ...)
{
    va_list ap;
    char str[128];

    va_start(ap, msg);
    vsprintf(str, msg, ap);
    va_end(ap);
    if (midnight_shutdown || !the_hint || !the_hint->widget.parent)
	return;

    if (message_visible || (xterm_flag && xterm_hintbar)) {
        set_hintbar(str);
    }
}

void rotate_dash (void)
{
#ifndef HAVE_X
    static char rotating_dash [] = "|/-\\";
    static int pos = 0;

    if (!nice_rotating_dash || (ok_to_refresh <= 0))
	return;

    if (pos >= sizeof (rotating_dash)-1)
	pos = 0;
    move (0, COLS-1);
    addch (rotating_dash [pos]);
    mc_refresh ();
    pos++;
#endif
}

void remove_dash (void)
{
#ifndef HAVE_X
    if (!nice_rotating_dash)
	return;

    /* Currently, it's much nicer with the CPU to do this instead of
       calling do_refresh.

       I should implement a routine called invalidate_region that would
       send a draw message only to the affected views.  But for now
       this is fine.
    */

    move (0, COLS-1);
    addch (' ');
#endif
}

char *get_nth_panel_name (int num)
{
    static char buffer [20];

    if (!num)
        return "New Left Panel";
    else if (num == 1)
        return "New Right Panel";
    else {
        sprintf (buffer, "%ith Panel", num);
        return buffer;
    }
}

/* I wonder if I should start to use the folding mode than Dugan uses */
/*                                                                     */
/* This is the centralized managing of the panel display types         */
/* This routine takes care of destroying and creating new widgets      */
/* Please note that it could manage MAX_VIEWS, not just left and right */
/* Currently nothing in the code takes advantage of this and has hard- */
/* coded values for two panels only                                    */

/* Set the num-th panel to the view type: type */
/* This routine also keeps at least one WPanel object in the screen */
/* since a lot of routines depend on the current_panel variable */
void set_display_type (int num, int type)
{
    int x, y, cols, lines;
    int    the_other;		/* Index to the other panel */
    char   *file_name = 0;	/* For Quick view */
    Widget *new_widget, *old_widget;
    WPanel  *the_other_panel;

    x =y = cols = lines = 0;
    old_widget = 0;
    if (num >= MAX_VIEWS){
	fprintf (stderr, "Could not allocate more that %d views\n", MAX_VIEWS);
	abort ();
    }

    /* Check that we will have a WPanel * at least */
    the_other = 0;
    if (type != view_listing){
	the_other = num == 0 ? 1 : 0;

	if (panels [the_other].type != view_listing)
	    return;

    }

    /* Get rid of it */
    if (panels [num].widget){
	Widget *w = panels [num].widget;
	WPanel *panel = (WPanel *) panels [num].widget;

	x = w->x;
	y = w->y;
	cols  = w->cols;
	lines = w->lines;
	old_widget = panels [num].widget;

	if (panels [num].type == view_listing){
	    if (panel->frame_size == frame_full && type != view_listing){
		cols = COLS - first_panel_size;
		if (num == 1)
		    x = first_panel_size;
	    }
	}
#ifdef HAVE_TK
	tk_evalf ("container_clean %s", panel->widget.wcontainer);
#endif
    }

    new_widget = 0;

    switch (type){
    case view_listing:
	new_widget = (Widget *) panel_new (get_nth_panel_name (num));
	break;

    case view_info:
	new_widget = (Widget *) info_new ();

	break;

    case view_tree:
	new_widget = (Widget *) tree_new (1, 0, 0, 0, 0);
	break;

    case view_quick:
	new_widget = (Widget *) view_new (0, 0, 0, 0, 1);
	the_other_panel = (WPanel *) panels [the_other].widget;
	if (the_other_panel)
	    file_name =
		the_other_panel->dir.list[the_other_panel->selected].fname;
	else
	    file_name = "";

	view_init ((WView *) new_widget, 0, file_name, 0);
	break;
    }
    panels [num].type = type;
    panels [num].widget = (Widget *) new_widget;

    /* We set the same size the old widget had */
    widget_set_size ((Widget *) new_widget, y, x, lines, cols);

    /* We wanna the new widget at the same position */
    /* XView sets wcontainer to !0 <- Not XView, but we, when we create it */
    /* Ok, the XView support code does it */
    if (old_widget && old_widget->wcontainer){
	new_widget->wcontainer = old_widget->wcontainer;
	new_widget->area = old_widget->area;
    }

    /* We use replace to keep the circular list of the dialog in the */
    /* same state.  Maybe we could just kill it and then replace it  */
    if (midnight_dlg && old_widget){
	dlg_replace_widget (midnight_dlg, old_widget, panels [num].widget);
    }
    if (type == view_listing){
	if (num == 0)
	    left_panel = (WPanel *) new_widget;
	else
	    right_panel = (WPanel *) new_widget;
    }

    if (type == view_tree)
	the_tree = (WTree *) new_widget;

    /* Prevent current_panel's value from becoming invalid.
     * It's just a quick hack to prevent segfaults. Comment out and
     * try following:
     * - select left panel
     * - invoke menue left/tree
     * - as long as you stay in the left panel almost everything that uses
     *   cpanel causes segfault, e.g. C-Enter, C-x c, ...
     */

    if (type != view_listing)
	if (cpanel == (WPanel *) old_widget)
	    current_panel = num == 0 ? right_panel : left_panel;
}

#ifndef HAVE_XVIEW
/* This routine is deeply sticked to the two panels idea.
   What should it do in more panels. ANSWER - don't use it
   in any multiple panels environment. */
void swap_panels ()
{
    Widget tmp;
    Widget *tmp_widget;
    WPanel panel;
    WPanel *panel1, *panel2;
    int tmp_type;

#if 0
#ifdef HAVE_PORTABLE_TOKEN_PASTING
#define panelswap(e) panel.##e = panel1->##e; panel1->##e = panel2->##e; panel2->##e = panel.##e;
#define panelswapstr(e) strcpy (panel.##e, panel1->##e); strcpy (panel1->##e, panel2->##e); strcpy (panel2->##e, panel.##e);
#else
#define panelswap(e) panel./**/e = panel1->/**/e; panel1->/**/e = panel2->/**/e; panel2->/**/e = panel./**/e;
#define panelswapstr(e) strcpy (panel./**/e, panel1->/**/e); strcpy (panel1->/**/e, panel2->/**/e); strcpy (panel2->/**/e, panel./**/e);
#endif
#endif

#define panelswap(x) panel. x = panel1-> x; panel1-> x = panel2-> x; panel2-> x = panel. x;

#define panelswapstr(e) strcpy (panel. e, panel1-> e); \
                        strcpy (panel1-> e, panel2-> e); \
                        strcpy (panel2-> e, panel. e);
    panel1 = (WPanel *) panels [0].widget;
    panel2 = (WPanel *) panels [1].widget;
    if (panels [0].type == view_listing && panels [1].type == view_listing) {
        /* Change everything except format/sort/panel_name etc. */
        panelswap (dir);
        panelswap (active);
        panelswapstr (cwd);
        panelswapstr (lwd);
        panelswap (count);
        panelswap (marked);
        panelswap (dirs_marked);
        panelswap (total);
        panelswap (top_file);
        panelswap (selected);
        panelswap (is_panelized);
        panelswap (dir_stat);

        panel1->searching = 0;
        panel2->searching = 0;
        if (cpanel == panel1)
            current_panel = panel2;
        else
            current_panel = panel1;
        if (midnight_dlg->current->widget == panels [0].widget)
            dlg_select_widget (midnight_dlg, (void *) panels [1].widget);
        else if (midnight_dlg->current->widget == panels [1].widget)
            dlg_select_widget (midnight_dlg, (void *) panels [0].widget);
    } else {
	WPanel *tmp_panel;

	tmp_panel=right_panel;
	right_panel=left_panel;
	left_panel=tmp_panel;

	if (panels [0].type == view_listing) {
            if (!strcmp (panel1->panel_name, get_nth_panel_name (0))) {
                free (panel1->panel_name);
                panel1->panel_name = strdup (get_nth_panel_name (1));
            }
        }
        if (panels [1].type == view_listing) {
            if (!strcmp (panel2->panel_name, get_nth_panel_name (1))) {
                free (panel2->panel_name);
                panel2->panel_name = strdup (get_nth_panel_name (0));
            }
        }

        tmp.x = panels [0].widget->x;
        tmp.y = panels [0].widget->y;
        tmp.cols = panels [0].widget->cols;
        tmp.lines = panels [0].widget->lines;

        panels [0].widget->x = panels [1].widget->x;
        panels [0].widget->y = panels [1].widget->y;
        panels [0].widget->cols = panels [1].widget->cols;
        panels [0].widget->lines = panels [1].widget->lines;

        panels [1].widget->x = tmp.x;
        panels [1].widget->y = tmp.y;
        panels [1].widget->cols = tmp.cols;
        panels [1].widget->lines = tmp.lines;

        tmp_widget = panels [0].widget;
        panels [0].widget = panels [1].widget;
        panels [1].widget = tmp_widget;
        tmp_type = panels [0].type;
        panels [0].type = panels [1].type;
        panels [1].type = tmp_type;
    }
}
#endif

int get_display_type (int index)
{
    return panels [index].type;
}

Widget *get_panel_widget (int index)
{
    return panels [index].widget;
}

int get_current_index (void)
{
    if (panels [0].widget == ((Widget *) cpanel))
	return 0;
    else
	return 1;
}

int get_other_index (void)
{
    return !get_current_index ();
}

/* Returns the view type for the current panel/view */
int get_current_type (void)
{
    if (panels [0].widget == (Widget *) cpanel)
	return panels [0].type;
    else
	return panels [1].type;
}

/* Returns the view type of the unselected panel */
int get_other_type (void)
{
    if (panels [0].widget == (Widget *) cpanel)
	return panels [1].type;
    else
	return panels [0].type;
}