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diff --git a/src/ui/dialog/object-attributes.h b/src/ui/dialog/object-attributes.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Generic object attribute editor
+ *//*
+ * Authors:
+ * see git history
+ * Kris De Gussem <Kris.DeGussem@gmail.com>
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_DIALOGS_OBJECT_ATTRIBUTES_H
+#define SEEN_DIALOGS_OBJECT_ATTRIBUTES_H
+
+#include "desktop.h"
+#include "object/sp-object.h"
+#include "ui/dialog/dialog-base.h"
+#include "ui/operation-blocker.h"
+#include "ui/widget/spinbutton.h"
+#include "ui/widget/style-swatch.h"
+#include "ui/widget/unit-tracker.h"
+#include <glibmm/ustring.h>
+#include <gtkmm/grid.h>
+#include <gtkmm/label.h>
+#include <gtkmm/widget.h>
+#include <memory>
+#include <string>
+#include <map>
+
+class SPAttributeTable;
+class SPItem;
+
+namespace Inkscape {
+namespace UI {
+namespace Dialog {
+
+namespace details {
+    class AttributesPanel {
+    public:
+        AttributesPanel();
+        virtual ~AttributesPanel() = default;
+
+        void update_panel(SPObject* object, SPDesktop* desktop);
+        Gtk::Widget& widget() { if(!_widget) throw "crap"; return *_widget; }
+        Glib::ustring get_title() const { return _title; }
+        bool supports_fill_stroke() const {return _show_fill_stroke; }
+
+    protected:
+        virtual void update(SPObject* object) = 0;
+        // value with units changed by the user; modify current object
+        void change_value_px(SPObject* object, const Glib::RefPtr<Gtk::Adjustment>& adj, const char* attr, std::function<void (double)>&& setter);
+        // angle in degrees changed by the user; modify current object
+        void change_angle(SPObject* object, const Glib::RefPtr<Gtk::Adjustment>& adj, std::function<void (double)>&& setter);
+        // modify current object
+        void change_value(SPObject* object, const Glib::RefPtr<Gtk::Adjustment>& adj, std::function<void (double)>&& setter);
+
+        SPDesktop* _desktop = nullptr;
+        OperationBlocker _update;
+        bool _show_fill_stroke = true;
+        Glib::ustring _title;
+        Gtk::Widget* _widget = nullptr;
+        std::unique_ptr<UI::Widget::UnitTracker> _tracker;
+    };
+}
+
+/**
+ * A dialog widget to show object attributes (currently for images and links).
+ */
+class ObjectAttributes : public DialogBase
+{
+public:
+    ObjectAttributes();
+    ~ObjectAttributes() override = default;
+
+    void selectionChanged(Selection *selection) override;
+    void selectionModified(Selection *selection, guint flags) override;
+
+    void desktopReplaced() override;
+
+    /**
+     * Updates entries and other child widgets on selection change, object modification, etc.
+     */
+    void widget_setup();
+
+private:
+    Glib::RefPtr<Gtk::Builder> _builder;
+
+    void create_panels();
+    std::map<std::string, std::unique_ptr<details::AttributesPanel>> _panels;
+    details::AttributesPanel* get_panel(SPObject* object);
+    void update_panel(SPObject* object);
+
+    details::AttributesPanel* _current_panel = nullptr;
+    OperationBlocker _update;
+    Gtk::Box& _main_panel;
+    Gtk::Label& _obj_title;
+    // Contains a pointer to the currently selected item (NULL in case nothing is or multiple objects are selected).
+    SPItem* _current_item = nullptr;
+    Inkscape::UI::Widget::StyleSwatch _style_swatch;
+};
+
+}
+}
+}
+
+#endif
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :