1 files changed, 66 insertions, 0 deletions
diff --git a/src/pattern-manager.h b/src/pattern-manager.h
new file mode 100644
index 0000000..86d5275
--- /dev/null
+++ b/src/pattern-manager.h
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#ifndef INKSCAPE_PATTERN_MANAGER_H
+#define INKSCAPE_PATTERN_MANAGER_H
+
+#include <gtkmm/treemodel.h>
+#include <vector>
+#include <unordered_map>
+#include "ui/widget/pattern-store.h"
+
+class SPPattern;
+class SPDocument;
+
+namespace Inkscape {
+
+class PatternManager {
+public:
+    static PatternManager& get();
+    ~PatternManager() = default;
+
+    struct Category : Glib::Object {
+        const Glib::ustring name;
+        const std::vector<SPPattern*> patterns;
+        const bool all;
+
+        Category(Glib::ustring name, std::vector<SPPattern*> patterns, bool all)
+            : name(std::move(name)), patterns(std::move(patterns)), all(all) {}
+    };
+
+    class PatternCategoryColumns : public Gtk::TreeModel::ColumnRecord {
+    public:
+        PatternCategoryColumns() {
+            add(name);
+            add(category);
+            add(all_patterns);
+        }
+        Gtk::TreeModelColumn<Glib::ustring> name;
+        Gtk::TreeModelColumn<Glib::RefPtr<Category>> category;
+        Gtk::TreeModelColumn<bool> all_patterns;
+    } columns;
+
+    // get all stock pattern categories
+    Glib::RefPtr<Gtk::TreeModel> get_categories();
+
+    // get pattern description item
+    Glib::RefPtr<Inkscape::UI::Widget::PatternItem> get_item(SPPattern* pattern);
+
+    // get pattern image on a solid background for use in UI lists
+    Cairo::RefPtr<Cairo::Surface> get_image(SPPattern* pattern, int width, int height, double device_scale);
+
+    // get pattern image on checkerboard background for use as a larger preview
+    Cairo::RefPtr<Cairo::Surface> get_preview(SPPattern* pattern, int width, int height, unsigned int rgba_background, double device_scale);
+
+private:
+    PatternManager();
+    Glib::RefPtr<Gtk::TreeModel> _model;
+    std::vector<std::shared_ptr<SPDocument>> _documents;
+    std::vector<Glib::RefPtr<Category>> _categories;
+    std::unordered_map<SPPattern*, Glib::RefPtr<Inkscape::UI::Widget::PatternItem>> _cache;
+    std::shared_ptr<SPDocument> _preview_doc;
+    std::shared_ptr<SPDocument> _big_preview_doc;
+};
+
+} // namespace
+
+#endif