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diff --git a/src/selection-chemistry.h b/src/selection-chemistry.h
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--- /dev/null
+++ b/src/selection-chemistry.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_SELECTION_CHEMISTRY_H
+#define SEEN_SELECTION_CHEMISTRY_H
+
+/*
+ * Miscellaneous operations on selected items
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Frank Felfe <innerspace@iname.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2012 authors
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/forward.h>
+#include <vector>
+#include <glibmm/ustring.h>
+
+class SPCSSAttr;
+class SPDesktop;
+class SPDocument;
+class SPItem;
+class SPObject;
+
+namespace Inkscape {
+
+class Selection;
+class ObjectSet;
+
+namespace LivePathEffect {
+    class PathParam;
+}
+
+    class SelectionHelper {
+    public:
+        static void selectAll(SPDesktop *desktop);
+        static void selectAllInAll(SPDesktop *desktop);
+        static void selectNone(SPDesktop *desktop);
+        static void selectSameFillStroke(SPDesktop *dt);
+        static void selectSameFillColor(SPDesktop *dt);
+        static void selectSameStrokeColor(SPDesktop *dt);
+        static void selectSameStrokeStyle(SPDesktop *dt);
+        static void selectSameObjectType(SPDesktop *dt);
+        static void invert(SPDesktop *desktop);
+        static void invertAllInAll(SPDesktop *desktop);
+        static void reverse(SPDesktop *dt);
+        static void fixSelection(SPDesktop *desktop);
+    };
+} // namespace Inkscape
+
+void sp_edit_clear_all(Inkscape::Selection *selection);
+
+void sp_edit_select_all(SPDesktop *desktop);
+void sp_edit_select_all_in_all_layers (SPDesktop *desktop);
+void sp_edit_invert (SPDesktop *desktop);
+void sp_edit_invert_in_all_layers (SPDesktop *desktop);
+
+
+SPCSSAttr *take_style_from_item (SPObject *object);
+
+void sp_selection_paste(SPDesktop *desktop, bool in_place);
+
+void sp_set_style_clipboard (SPCSSAttr *css);
+
+
+void sp_selection_item_next (SPDesktop *desktop);
+void sp_selection_item_prev (SPDesktop *desktop);
+
+void sp_selection_next_patheffect_param(SPDesktop * dt);
+
+//void sp_selection_edit_clip_or_mask(SPDesktop * dt, bool clip);
+
+enum SPSelectStrokeStyleType {
+    SP_FILL_COLOR  = 0,
+    SP_STROKE_COLOR  = 1,
+    SP_STROKE_STYLE_WIDTH = 2,
+    SP_STROKE_STYLE_DASHES = 3,
+    SP_STROKE_STYLE_MARKERS = 4,
+    SP_STROKE_STYLE_ALL = 5,
+    SP_STYLE_ALL = 6
+};
+
+void sp_select_same_fill_stroke_style(SPDesktop *desktop, gboolean fill, gboolean strok, gboolean style);
+void sp_select_same_object_type(SPDesktop *desktop);
+
+std::vector<SPItem*> sp_get_same_style(SPItem *sel, std::vector<SPItem*> &src, SPSelectStrokeStyleType type=SP_STYLE_ALL);
+std::vector<SPItem*> sp_get_same_object_type(SPItem *sel, std::vector<SPItem*> &src);
+
+void scroll_to_show_item(SPDesktop *desktop, SPItem *item);
+
+void sp_undo (SPDesktop *desktop, SPDocument *doc);
+void sp_redo (SPDesktop *desktop, SPDocument *doc);
+
+bool fit_canvas_to_drawing(SPDocument *, bool with_margins = false);
+void fit_canvas_to_drawing(SPDesktop *);
+
+void unlock_all(SPDesktop *dt);
+void unlock_all_in_all_layers(SPDesktop *dt);
+void unhide_all(SPDesktop *dt);
+void unhide_all_in_all_layers(SPDesktop *dt);
+
+std::vector<SPItem*> &get_all_items(std::vector<SPItem*> &list, SPObject *from, SPDesktop *desktop, bool onlyvisible, bool onlysensitive, bool ingroups, std::vector<SPItem*> const &exclude);
+
+std::vector<SPItem*> sp_degroup_list (std::vector<SPItem*> &items);
+
+/* selection cycling */
+enum SPCycleType
+{
+    SP_CYCLE_SIMPLE,
+    SP_CYCLE_VISIBLE, // cycle only visible items
+    SP_CYCLE_FOCUS // readjust visible area to view selected item
+};
+
+
+
+// TODO FIXME: This should be moved into preference repr
+extern SPCycleType SP_CYCLING;
+
+#endif // SEEN_SELECTION_CHEMISTRY_H