feat: initial commit

src/model/EditorDocument.h

@@ -0,0 +1,70 @@
+#pragma once
+
+#include "model/Annotation.h"
+
+#include <QObject>
+#include <QImage>
+
+#include <optional>
+#include <vector>
+
+namespace ws::model {
+
+class EditorDocument : public QObject {
+    Q_OBJECT
+
+public:
+    explicit EditorDocument(QObject* parent = nullptr);
+
+    void set_base_image(const QImage& image);
+    [[nodiscard]] const QImage& base_image() const;
+
+    void add_annotation(const Annotation& annotation);
+    bool select_at(const QPointF& point);
+    void clear_selection();
+    bool move_selected_by(const QPointF& delta);
+    bool update_annotation(const Annotation& annotation);
+    bool delete_selected();
+
+    [[nodiscard]] const std::vector<Annotation>& annotations() const;
+    [[nodiscard]] const Annotation* selected_annotation() const;
+    [[nodiscard]] AnnotationStyle current_style() const;
+    void set_current_style(const AnnotationStyle& style);
+
+    [[nodiscard]] bool can_undo() const;
+    [[nodiscard]] bool can_redo() const;
+    bool undo();
+    bool redo();
+
+    [[nodiscard]] QImage render_to_image() const;
+    [[nodiscard]] bool is_dirty() const;
+    void mark_clean();
+
+signals:
+    void document_changed();
+    void selection_changed();
+    void history_changed();
+    void dirty_changed(bool dirty);
+
+private:
+    struct Snapshot {
+        std::vector<Annotation> annotations;
+        std::optional<QUuid> selected;
+    };
+
+    void push_undo_state();
+    void emit_dirty_if_changed(bool previous_dirty);
+
+    [[nodiscard]] Annotation* find_annotation(const QUuid& id);
+    [[nodiscard]] const Annotation* find_annotation(const QUuid& id) const;
+
+    QImage base_image_;
+    std::vector<Annotation> annotations_;
+    std::optional<QUuid> selected_id_;
+    AnnotationStyle current_style_;
+    std::vector<Snapshot> undo_stack_;
+    std::vector<Snapshot> redo_stack_;
+    bool dirty_ = false;
+};
+
+}  // namespace ws::model