Handle CK_SyntaxOnOff action in dialog level instead of widget one.

src/editor/edit-impl.h

@@ -251,6 +251,7 @@ gboolean edit_load_back_cmd (WEdit * edit);
 gboolean edit_load_forward_cmd (WEdit * edit);
 void edit_block_process_cmd (WEdit * edit, int macro_number);
 void edit_refresh_cmd (void);
+void edit_syntax_onoff_cmd (Dlg_head * h);
 void edit_date_cmd (WEdit * edit);
 void edit_goto_cmd (WEdit * edit);
 int eval_marks (WEdit * edit, long *start_mark, long *end_mark);

src/editor/edit.c

@@ -4056,13 +4056,6 @@ edit_execute_cmd (WEdit * edit, unsigned long command, int char_for_insertion)
         edit_syntax_dialog (edit);
         break;
 
-    case CK_SyntaxOnOff:
-        option_syntax_highlighting ^= 1;
-        if (option_syntax_highlighting == 1)
-            edit_load_syntax (edit, NULL, edit->syntax_type);
-        edit->force |= REDRAW_PAGE;
-        break;
-
     case CK_ShowTabTws:
         enable_show_tabs_tws ^= 1;
         edit->force |= REDRAW_PAGE;

src/editor/editcmd.c

@@ -1431,6 +1431,29 @@ edit_delete_macro (WEdit * edit, int hotkey)
     return TRUE;
 }
 
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Callback for the iteration of objects in the 'editors' array.
+ * Toggle syntax highlighting in editor object.
+ *
+ * @param data      probably WEdit object
+ * @param user_data unused
+ */
+
+static void
+edit_syntax_onoff_cb (void *data, void *user_data)
+{
+    (void) user_data;
+
+    if (edit_widget_is_editor ((const Widget *) data))
+    {
+        WEdit *edit = (WEdit *) data;
+
+        if (option_syntax_highlighting)
+            edit_load_syntax (edit, NULL, edit->syntax_type);
+        edit->force |= REDRAW_PAGE;
+    }
+}
 
 /* --------------------------------------------------------------------------------------------- */
 /*** public functions ****************************************************************************/
@@ -1444,6 +1467,21 @@ edit_refresh_cmd (void)
     tty_keypad (TRUE);
 }
 
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * Toggle syntax highlighting in all editor windows.
+ *
+ * @param h root widget for all windows
+ */
+
+void
+edit_syntax_onoff_cmd (Dlg_head * h)
+{
+    option_syntax_highlighting = !option_syntax_highlighting;
+    g_list_foreach (h->widgets, edit_syntax_onoff_cb, NULL);
+    dlg_redraw (h);
+}
+
 /* --------------------------------------------------------------------------------------------- */
 
 void

src/editor/editwidget.c

@@ -581,6 +581,9 @@ edit_dialog_command_execute (Dlg_head * h, unsigned long command)
     case CK_About:
         edit_about ();
         break;
+    case CK_SyntaxOnOff:
+        edit_syntax_onoff_cmd (h);
+        break;
     case CK_Refresh:
         edit_refresh_cmd ();
         break;