commit 56168aa87af6918bce552d405f8e757349360b03
from: Omar Polo <op@omarpolo.com>
date: Wed Aug 18 16:49:46 2021 UTC

add tab-bar-show option to control the tab bar rendering

If tab-bar-show is -1 hide the tab bar permanently, if it's 0 show it
unconditionally.  If it's 1, show the bar only when there is more than
one tab.

commit - 3cea4ff5b5f444730267c4774f4217b6079fc71a
commit + 56168aa87af6918bce552d405f8e757349360b03
blob - e7099ca9b0e80d74258336f5a07f922b7d38784e
blob + 167ff546b01b58fee00760256ac5e7efd01a80b0
--- defaults.c
+++ defaults.c
@@ -38,6 +38,7 @@ int hide_pre_closing_line = 0;
 int hide_pre_context = 0;
 int olivetti_mode = 1;
 int set_title = 1;
+int tab_bar_show = 1;
 
 struct lineprefix line_prefixes[] = {
 	[LINE_TEXT] =		{ "",		"" },
@@ -495,6 +496,13 @@ config_setvari(const char *var, int val)
 		set_title = !!val;
 	} else if (!strcmp(var, "autosave")) {
 		autosave = val;
+	} else if (!strcmp(var, "tab-bar-show")) {
+		if (val < 0)
+			tab_bar_show = -1;
+		else if (val == 0)
+			tab_bar_show = 0;
+		else
+			tab_bar_show = 1;
 	} else {
 		return 0;
 	}
blob - 3bb7bee9fa10b99fdc77684477d6c89353acc874
blob + aae4fb1d66e38db84b8a314c42c74059183477e8
--- defaults.h
+++ defaults.h
@@ -29,6 +29,7 @@ extern int	 hide_pre_closing_line;
 extern int	 hide_pre_context;
 extern int	 olivetti_mode;
 extern int	 set_title;
+extern int	 tab_bar_show;
 
 struct lineprefix {
 	const char	*prfx1;
blob - 8a486a31ba1650d21b2ddd0e4213451a1905ad34
blob + 8532e8276791abb4bb8afa03438ae40d3b4b107d
--- ui.c
+++ ui.c
@@ -74,6 +74,7 @@ static void		 update_loading_anim(int, short, void*);
 static void		 stop_loading_anim(struct tab*);
 
 static int		 should_rearrange_windows;
+static int		 show_tab_bar;
 static int		 too_small;
 static int		 x_offset;
 
@@ -294,12 +295,24 @@ handle_resize_nodelay(int s, short ev, void *d)
 	rearrange_windows();
 }
 
+static inline int
+should_show_tab_bar(void)
+{
+	if (tab_bar_show == -1)
+		return 0;
+	if (tab_bar_show == 0)
+		return 1;
+
+	return TAILQ_NEXT(TAILQ_FIRST(&tabshead), tabs) != NULL;
+}
+
 static void
 rearrange_windows(void)
 {
 	int		 lines;
 
 	should_rearrange_windows = 0;
+	show_tab_bar = should_show_tab_bar();
 
 	lines = LINES;
 
@@ -326,26 +339,31 @@ rearrange_windows(void)
 	mvwin(modeline, --lines, 0);
 	wresize(modeline, 1, COLS);
 
-	body_lines = --lines;
+	body_lines = show_tab_bar ? --lines : lines;
 	body_cols = COLS;
 
+	/*
+	 * Here we make the assumption that show_tab_bar is either 0
+	 * or 1, and reuse that as argument to mvwin.
+	 */
 	if (side_window) {
 		help_cols = 0.3 * COLS;
 		help_lines = lines;
-		mvwin(help, 1, 0);
+		mvwin(help, show_tab_bar, 0);
 		wresize(help, help_lines, help_cols);
 
 		wrap_page(&helpwin, help_cols);
 
 		body_cols = COLS - help_cols - 1;
-		mvwin(body, 1, help_cols);
+		mvwin(body, show_tab_bar, help_cols);
 	} else
-		mvwin(body, 1, 0);
+		mvwin(body, show_tab_bar, 0);
 
 	update_x_offset();
 	wresize(body, body_lines, body_cols);
 
-	wresize(tabline, 1, COLS);
+	if (show_tab_bar)
+		wresize(tabline, 1, COLS);
 
 	wrap_page(&current_tab->buffer, body_cols);
 	redraw_tab(current_tab);
@@ -879,7 +897,9 @@ redraw_tab(struct tab *tab)
 		wnoutrefresh(help);
 	}
 
-	redraw_tabline();
+	if (show_tab_bar)
+		redraw_tabline();
+
 	redraw_body(tab);
 	redraw_modeline(tab);
 	redraw_minibuffer();
@@ -1078,7 +1098,9 @@ ui_on_tab_loaded(struct tab *tab)
 	stop_loading_anim(tab);
 	message("Loaded %s", tab->hist_cur->h);
 
-	redraw_tabline();
+	if (show_tab_bar)
+		redraw_tabline();
+
 	wrefresh(tabline);
 	place_cursor(0);
 }