1 files changed, 140 insertions, 0 deletions
diff --git a/src/ui/desktop/document-check.cpp b/src/ui/desktop/document-check.cpp
new file mode 100644
index 0000000..6a8a809
--- /dev/null
+++ b/src/ui/desktop/document-check.cpp
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Check for data loss when closing a document window.
+ *
+ * Copyright (C) 2004-2021 Authors
+ *
+ * The contents of this file may be used under the GNU General Public License Version 2 or later.
+ *
+ */
+
+/* Authors:
+ *   MenTaLguY
+ *   Link Mauve
+ *   Thomas Holder
+ *   Tavmjong Bah
+ */
+
+#include "document-check.h"
+
+#include <glibmm/i18n.h>  // Internationalization
+#include <gtkmm.h>
+
+#include "inkscape-window.h"
+#include "object/sp-namedview.h"
+
+#include "file.h"
+#include "extension/system.h" // Inkscape::Extension::FILE...
+
+/** Check if closing document associated with window will cause data loss, and if so opens a dialog
+ *  that gives user options to save or ignore.
+ *
+ *  Returns true if document should remain open.
+ */
+bool
+document_check_for_data_loss(InkscapeWindow* window)
+{
+    auto document = window->get_document();
+
+    if (document->isModifiedSinceSave()) {
+        // Document has been modified!
+
+        Glib::ustring message = g_markup_printf_escaped(
+            _("<span weight=\"bold\" size=\"larger\">Save changes to document \"%s\" before closing?</span>\n\n"
+              "If you close without saving, your changes will be discarded."),
+            document->getDocumentName());
+
+        Gtk::MessageDialog dialog =
+            Gtk::MessageDialog(*window, message, true, Gtk::MESSAGE_WARNING, Gtk::BUTTONS_NONE);
+        dialog.property_destroy_with_parent() = true;
+
+        // Don't allow text to be selected (via tabbing).
+        Gtk::Container *ma = dialog.get_message_area();
+        std::vector<Gtk::Widget*> ma_labels = ma->get_children();
+        ma_labels[0]->set_can_focus(false);
+
+        dialog.add_button(_("Close _without saving"), Gtk::RESPONSE_NO);
+        dialog.add_button(_("_Cancel"),               Gtk::RESPONSE_CANCEL);
+        dialog.add_button(_("_Save"),                 Gtk::RESPONSE_YES);
+        dialog.set_default_response(Gtk::RESPONSE_YES);
+
+        int response = dialog.run();
+
+        switch (response) {
+            case GTK_RESPONSE_YES:
+            {
+                // Save document
+                sp_namedview_document_from_window(window->get_desktop()); // Save window geometry in document.
+                if (!sp_file_save_document(*window, document)) {
+                    // Save dialog cancelled or save failed.
+                    return true;
+                }
+                break;
+            }
+            case GTK_RESPONSE_NO:
+                break;
+            default: // cancel pressed, or dialog was closed
+                return true;
+                break;
+        }
+    }
+
+    // Check for data loss due to saving in lossy format.
+    bool allow_data_loss = false;
+    while (document->getReprRoot()->attribute("inkscape:dataloss") != nullptr && allow_data_loss == false) {
+        // This loop catches if the user saves to a lossy format when in the loop. 
+
+        Glib::ustring message = g_markup_printf_escaped(
+            _("<span weight=\"bold\" size=\"larger\">The file \"%s\" was saved with a format that may cause data loss!</span>\n\n"
+              "Do you want to save this file as Inkscape SVG?"),
+            document->getDocumentName() ? document->getDocumentName() : "Unnamed");
+
+        Gtk::MessageDialog dialog =
+            Gtk::MessageDialog(*window, message, true, Gtk::MESSAGE_WARNING, Gtk::BUTTONS_NONE);
+        dialog.property_destroy_with_parent() = true;
+
+        // Don't allow text to be selected (via tabbing).
+        Gtk::Container *ma = dialog.get_message_area();
+        std::vector<Gtk::Widget*> ma_labels = ma->get_children();
+        ma_labels[0]->set_can_focus(false);
+
+        dialog.add_button(_("Close _without saving"), Gtk::RESPONSE_NO);
+        dialog.add_button(_("_Cancel"),               Gtk::RESPONSE_CANCEL);
+        dialog.add_button(_("_Save as Inkscape SVG"), Gtk::RESPONSE_YES);
+        dialog.set_default_response(Gtk::RESPONSE_YES);
+
+        int response = dialog.run();
+
+        switch (response) {
+            case GTK_RESPONSE_YES:
+            {
+                if (!sp_file_save_dialog(*window, document, Inkscape::Extension::FILE_SAVE_METHOD_INKSCAPE_SVG)) {
+                    // Save dialog cancelled or save failed.
+                    return TRUE;
+                }
+
+                break;
+            }
+            case GTK_RESPONSE_NO:
+                allow_data_loss = true;
+                break;
+            default: // cancel pressed, or dialog was closed
+                return true;
+                break;
+        }
+    }
+
+    return false;
+}
+
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :