1 files changed, 90 insertions, 0 deletions
diff --git a/src/ui/tools/booleans-builder.h b/src/ui/tools/booleans-builder.h
new file mode 100644
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+++ b/src/ui/tools/booleans-builder.h
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ *//*
+ * Authors:
+ *   Martin Owens
+ *
+ * Copyright (C) 2022 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_TOOLS_BOOLEANS_BUILDER_H
+#define INKSCAPE_UI_TOOLS_BOOLEANS_BUILDER_H
+
+#include <vector>
+#include <optional>
+#include "helper/auto-connection.h"
+
+#include "booleans-subitems.h"
+#include "helper/auto-connection.h"
+#include "display/control/canvas-item-ptr.h"
+
+class SPDesktop;
+class SPDocument;
+class SPObject;
+
+namespace Inkscape {
+
+class CanvasItemGroup;
+class CanvasItemBpath;
+class ObjectSet;
+
+using VisualItem = CanvasItemPtr<CanvasItemBpath>;
+struct ItemPair
+{
+    WorkItem work;
+    VisualItem vis;
+    bool visible;
+};
+
+enum class TaskType
+{
+    NONE,
+    ADD,
+    DELETE
+};
+
+class BooleanBuilder
+{
+public:
+    BooleanBuilder(ObjectSet *obj, bool flatten = false);
+    ~BooleanBuilder();
+
+    void undo();
+    void redo();
+
+    std::vector<SPObject *> shape_commit(bool all = false);
+    ItemPair *get_item(const Geom::Point &point);
+    bool task_select(const Geom::Point &point, bool add_task = true);
+    bool task_add(const Geom::Point &point);
+    void task_cancel();
+    void task_commit();
+    bool has_items() const { return !_work_items.empty(); }
+    bool has_task() const { return (bool)_work_task; }
+    bool has_changes() const { return !_undo.empty(); }
+    bool highlight(const Geom::Point &point, bool add_task = true);
+
+private:
+    ObjectSet *_set;
+    CanvasItemPtr<CanvasItemGroup> _group;
+
+    std::vector<WorkItem> _work_items;
+    std::vector<ItemPair> _screen_items;
+    WorkItem _work_task;
+    VisualItem _screen_task;
+    bool _add_task;
+    bool _dark = false;
+
+    // Lists of _work_items which can be brought back.
+    std::vector<std::vector<WorkItem>> _undo;
+    std::vector<std::vector<WorkItem>> _redo;
+
+    auto_connection desk_modified_connection;
+
+    void redraw_item(CanvasItemBpath &bpath, bool selected, TaskType task);
+    void redraw_items();
+};
+
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_TOOLS_BOOLEANS_BUILDER_H