Centralize legacy document canvas bridge

src/legacy_document_canvas_services.cpp

@@ -0,0 +1,84 @@
+#include "pch.h"
+
+#include "legacy_document_canvas_services.h"
+
+#include "app.h"
+#include "legacy_history_services.h"
+
+namespace pp::panopainter {
+namespace {
+
+class LegacyDocumentCanvasClearServices final : public pp::app::DocumentCanvasClearServices {
+public:
+    explicit LegacyDocumentCanvasClearServices(App& app) noexcept
+        : app_(app)
+    {
+    }
+
+    void clear_current_canvas(float r, float g, float b, float a) override
+    {
+        if (!legacy_document_canvas_available(app_)) {
+            return;
+        }
+
+        app_.canvas->m_canvas->clear({ r, g, b, a });
+    }
+
+private:
+    App& app_;
+};
+
+class LegacyDocumentResizeServices final : public pp::app::DocumentResizeServices {
+public:
+    explicit LegacyDocumentResizeServices(App& app) noexcept
+        : app_(app)
+    {
+    }
+
+    void resize_document(int width, int height) override
+    {
+        if (!legacy_document_canvas_available(app_)) {
+            return;
+        }
+
+        app_.canvas->m_canvas->resize(width, height);
+    }
+
+    void update_title() override
+    {
+        app_.title_update();
+    }
+
+    void clear_history() override
+    {
+        clear_legacy_history();
+    }
+
+private:
+    App& app_;
+};
+
+} // namespace
+
+bool legacy_document_canvas_available(const App& app) noexcept
+{
+    return app.canvas != nullptr && app.canvas->m_canvas != nullptr;
+}
+
+pp::foundation::Status execute_legacy_document_canvas_clear_plan(
+    App& app,
+    const pp::app::DocumentCanvasClearPlan& plan)
+{
+    LegacyDocumentCanvasClearServices services(app);
+    return pp::app::execute_document_canvas_clear_plan(plan, services);
+}
+
+pp::foundation::Status execute_legacy_document_resize_plan(
+    App& app,
+    const pp::app::DocumentResizePlan& plan)
+{
+    LegacyDocumentResizeServices services(app);
+    return pp::app::execute_document_resize_plan(plan, services);
+}
+
+} // namespace pp::panopainter