add the option to hide the frist tab if there is only one tab

Author: sc0w

data/org.mate.pluma.gschema.xml.in

@@ -16,6 +16,11 @@
       <summary>Switch tabs with [ctrl] + [tab]</summary>
       <description>If true, it enables the ability to switch tabs using [ctrl + tab] and [ctrl + shift + tab].</description>
     </key>
+    <key name="show-single-tab" type="b">
+      <default>true</default>
+      <summary>Show the first tab if there is only one tab</summary>
+      <description>If false, it hides the first tab if there is only one tab.</description>
+    </key>
     <key name="color-scheme" type="s">
       <default>'tango'</default>
       <summary>Style Scheme</summary>

pluma/pluma-notebook.c

@@ -62,7 +62,6 @@ struct _PlumaNotebookPrivate
 	gint           x_start;
 	gint           y_start;
 	gint           drag_in_progress : 1;
-	gint	       always_show_tabs : 1;
 	gint           close_buttons_sensitive : 1;
 	gint           tab_drag_and_drop_enabled : 1;
 	guint          destroy_has_run : 1;
@@ -783,21 +782,18 @@ pluma_notebook_switch_page_cb (GtkNotebook     *notebook,
  * and the pref is not set.
  */
 static void
-update_tabs_visibility (PlumaNotebook *nb, 
-			gboolean       before_inserting)
+update_tabs_visibility (PlumaNotebook *nb)
 {
 	gboolean   show_tabs;
 	guint      num;
 	GSettings *settings;
 
 	num = gtk_notebook_get_n_pages (GTK_NOTEBOOK (nb));
 
-	if (before_inserting) num++;
-
-	show_tabs = (nb->priv->always_show_tabs || num > 1);
-
 	settings = g_settings_new ("org.mate.pluma");
 
+	show_tabs = (g_settings_get_boolean (settings, "show-single-tab") || num > 1);
+
 	if (g_settings_get_boolean (settings, "show-tabs-with-side-pane"))
 		gtk_notebook_set_show_tabs (GTK_NOTEBOOK (nb), show_tabs);
 	else
@@ -807,6 +803,8 @@ update_tabs_visibility (PlumaNotebook *nb,
 		else
 			gtk_notebook_set_show_tabs (GTK_NOTEBOOK (nb), show_tabs);
 	}
+
+	g_object_unref (settings);
 }
 
 static void
@@ -821,8 +819,6 @@ pluma_notebook_init (PlumaNotebook *notebook)
 	gtk_notebook_set_show_border (GTK_NOTEBOOK (notebook), FALSE);
 	gtk_notebook_set_show_tabs (GTK_NOTEBOOK (notebook), FALSE);
 
-	notebook->priv->always_show_tabs = TRUE;
-
 	g_signal_connect (notebook, 
 			  "button-press-event",
 			  (GCallback)button_press_cb, 
@@ -988,7 +984,7 @@ pluma_notebook_add_tab (PlumaNotebook *nb,
 				  GTK_WIDGET (tab),
 				  tab_label,
 				  position);
-	update_tabs_visibility (nb, TRUE);
+	update_tabs_visibility (nb);
 
 	g_signal_emit (G_OBJECT (nb), signals[TAB_ADDED], 0, tab);
 
@@ -1054,7 +1050,7 @@ remove_tab (PlumaTab      *tab,
 
 	remove_tab_label (nb, tab);
 	gtk_notebook_remove_page (GTK_NOTEBOOK (nb), position);
-	update_tabs_visibility (nb, FALSE);
+	update_tabs_visibility (nb);
 
 	g_signal_emit (G_OBJECT (nb), signals[TAB_REMOVED], 0, tab);
 

pluma/pluma-window.c

@@ -3623,7 +3623,18 @@ side_panel_visibility_changed (GtkWidget   *side_panel,
 	settings = g_settings_new ("org.mate.pluma");
 
 	if (!g_settings_get_boolean (settings, "show-tabs-with-side-pane"))
-		gtk_notebook_set_show_tabs (GTK_NOTEBOOK (window->priv->notebook), !visible);
+	{
+		if (visible)
+			gtk_notebook_set_show_tabs (GTK_NOTEBOOK (window->priv->notebook), FALSE);
+		else
+			gtk_notebook_set_show_tabs (GTK_NOTEBOOK (window->priv->notebook),
+						    g_settings_get_boolean (settings, "show-single-tab") ||
+						    (gtk_notebook_get_n_pages (GTK_NOTEBOOK (window->priv->notebook)) > 1));
+	}
+	else
+		gtk_notebook_set_show_tabs (GTK_NOTEBOOK (window->priv->notebook),
+					    g_settings_get_boolean (settings, "show-single-tab") ||
+					    (gtk_notebook_get_n_pages (GTK_NOTEBOOK (window->priv->notebook)) > 1));
 
 	if (pluma_prefs_manager_side_pane_visible_can_set ())
 		pluma_prefs_manager_set_side_pane_visible (visible);
@@ -3638,6 +3649,8 @@ side_panel_visibility_changed (GtkWidget   *side_panel,
 	if (!visible && window->priv->active_tab != NULL)
 		gtk_widget_grab_focus (GTK_WIDGET (
 				pluma_tab_get_view (PLUMA_TAB (window->priv->active_tab))));
+
+	g_object_unref (settings);
 }
 
 static void