Start refactoring printers into own directory

src/graphics/Label.hpp

@@ -22,6 +22,7 @@
 #include <pango/pangocairo.h>
 
 #include <cstdint>
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -31,6 +32,28 @@
 
 namespace ptprnt::graphics {
 
+// Custom deleters for Cairo/Pango resources
+struct CairoSurfaceDeleter {
+    void operator()(cairo_surface_t* surface) const {
+        if (surface)
+            cairo_surface_destroy(surface);
+    }
+};
+
+struct CairoDeleter {
+    void operator()(cairo_t* cr) const {
+        if (cr)
+            cairo_destroy(cr);
+    }
+};
+
+struct GObjectDeleter {
+    void operator()(gpointer obj) const {
+        if (obj)
+            g_object_unref(obj);
+    }
+};
+
 class Label : public ILabel {
    public:
     Label(const uint16_t heightPixel);
@@ -60,13 +83,14 @@ class Label : public ILabel {
     // methods
     [[nodiscard]] uint8_t getNumLines(std::string_view str);
     [[nodiscard]] PangoFontMap* createCustomFontMap();
-    // members
-    // TODO: convert raw pointers here into std::unique_ptr with custom deleters, calling g_object_unref()
-    cairo_surface_t* mSurface{nullptr};
-    cairo_t* mCairoCtx{nullptr};
-    PangoContext* mPangoCtx{nullptr};
-    PangoLayout* mPangoLyt{nullptr};
-    PangoFontMap* mFontMap{nullptr};
+    void configureLayout(PangoLayout* layout, const std::string& text, PangoFontDescription* fontDesc);
+    void applyHorizontalAlignment(PangoLayout* layout);
+
+    std::unique_ptr<cairo_surface_t, CairoSurfaceDeleter> mSurface{nullptr};
+    std::unique_ptr<cairo_t, CairoDeleter> mCairoCtx{nullptr};
+    std::unique_ptr<PangoContext, GObjectDeleter> mPangoCtx{nullptr};
+    std::unique_ptr<PangoLayout, GObjectDeleter> mPangoLyt{nullptr};
+    std::unique_ptr<PangoFontMap, GObjectDeleter> mFontMap{nullptr};
     double mFontSize{DEFAULT_FONT_SIZE};
     std::string mFontFamily{DEFAULT_FONT_FAMILY};
     HAlignPosition mHAlign = HAlignPosition::LEFT;