Unsafepastedialog: Modernise, Gtk4 preparation

src/Dialogs/UnsafePasteDialog.vala

@@ -1,37 +1,26 @@
 /*
-* Copyright 2011-2021 elementary, Inc. (https://elementary.io)
-*
-* This program is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public
-* License version 3 as published by the Free Software Foundation.
-*
-* This program 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 Lesser General Public
-* License along with this program; if not, write to the
-* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-* Boston, MA 02110-1301 USA
-*/
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ * SPDX-FileCopyrightText: 2011-2025 elementary, Inc. (https://elementary.io)
+ */
 
 public class Terminal.UnsafePasteDialog : Granite.MessageDialog {
+    public string text_to_paste { get; construct; }
+
     public UnsafePasteDialog (MainWindow parent, string title_text, string text_to_paste) {
         Object (
-            buttons: Gtk.ButtonsType.NONE,
+            transient_for: parent,
             primary_text: title_text,
-            transient_for: parent
+            text_to_paste: text_to_paste,
+            buttons: Gtk.ButtonsType.NONE
         );
-
-        show_error_details (text_to_paste);
     }
 
     construct {
         image_icon = new ThemedIcon ("dialog-warning");
 
         secondary_text =
             _("Copying commands into Terminal can be dangerous. Be sure you understand what each part of the pasted text does before continuing.");
+        show_error_details (text_to_paste);
 
         var show_protection_warnings = new Gtk.CheckButton.with_label (_("Show paste protection warnings"));