1 files changed, 83 insertions, 0 deletions
diff --git a/src/layout/algorithm/tiled/scrolling/ScrollTapeController.hpp b/src/layout/algorithm/tiled/scrolling/ScrollTapeController.hpp
new file mode 100644
index 00000000..d03a9b94
--- /dev/null
+++ b/src/layout/algorithm/tiled/scrolling/ScrollTapeController.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include "../../../../helpers/math/Math.hpp"
+#include "../../../../helpers/memory/Memory.hpp"
+#include <vector>
+
+namespace Layout::Tiled {
+
+    struct SColumnData;
+
+    enum eScrollDirection : uint8_t {
+        SCROLL_DIR_RIGHT = 0,
+        SCROLL_DIR_LEFT,
+        SCROLL_DIR_DOWN,
+        SCROLL_DIR_UP,
+    };
+
+    struct SStripData {
+        float              size = 1.F;  // size along primary axis
+        std::vector<float> targetSizes; // sizes along secondary axis for each target in this strip
+        WP<SColumnData>    userData;
+
+        SStripData() = default;
+    };
+
+    struct STapeLayoutResult {
+        CBox   box;
+        size_t stripIndex  = 0;
+        size_t targetIndex = 0;
+    };
+
+    class CScrollTapeController {
+      public:
+        CScrollTapeController(eScrollDirection direction = SCROLL_DIR_RIGHT);
+        ~CScrollTapeController() = default;
+
+        void              setDirection(eScrollDirection dir);
+        eScrollDirection  getDirection() const;
+        bool              isPrimaryHorizontal() const;
+        bool              isReversed() const;
+
+        size_t            addStrip(float size = 1.0F);
+        void              insertStrip(size_t afterIndex, float size = 1.0F);
+        void              removeStrip(size_t index);
+        size_t            stripCount() const;
+        SStripData&       getStrip(size_t index);
+        const SStripData& getStrip(size_t index) const;
+        void              swapStrips(size_t a, size_t b);
+
+        void              setOffset(double offset);
+        double            getOffset() const;
+        void              adjustOffset(double delta);
+
+        double            calculateMaxExtent(const CBox& usableArea, bool fullscreenOnOne = false) const;
+        double            calculateStripStart(size_t stripIndex, const CBox& usableArea, bool fullscreenOnOne = false) const;
+        double            calculateStripSize(size_t stripIndex, const CBox& usableArea, bool fullscreenOnOne = false) const;
+
+        CBox              calculateTargetBox(size_t stripIndex, size_t targetIndex, const CBox& usableArea, const Vector2D& workspaceOffset, bool fullscreenOnOne = false);
+
+        double            calculateCameraOffset(const CBox& usableArea, bool fullscreenOnOne = false);
+        Vector2D          getCameraTranslation(const CBox& usableArea, bool fullscreenOnOne = false);
+
+        void              centerStrip(size_t stripIndex, const CBox& usableArea, bool fullscreenOnOne = false);
+        void              fitStrip(size_t stripIndex, const CBox& usableArea, bool fullscreenOnOne = false);
+
+        bool              isStripVisible(size_t stripIndex, const CBox& usableArea, bool fullscreenOnOne = false) const;
+
+        size_t            getStripAtCenter(const CBox& usableArea, bool fullscreenOnOne = false) const;
+
+      private:
+        eScrollDirection        m_direction = SCROLL_DIR_RIGHT;
+        std::vector<SStripData> m_strips;
+        double                  m_offset = 0.0;
+
+        double                  getPrimary(const Vector2D& v) const;
+        double                  getSecondary(const Vector2D& v) const;
+        void                    setPrimary(Vector2D& v, double val) const;
+        void                    setSecondary(Vector2D& v, double val) const;
+        bool                    isBeingDragged() const;
+
+        Vector2D                makeVector(double primary, double secondary) const;
+    };
+};