context menus, document refactoring, fixes

src/clipboard.cpp

@@ -0,0 +1,25 @@
+#include "clipboard.h"
+
+#include <SDL3/SDL.h>
+
+namespace anm2ed::clipboard
+{
+  std::string Clipboard::get()
+  {
+    auto text = SDL_GetClipboardText();
+    auto string = std::string(text);
+    SDL_free(text);
+
+    return string;
+  }
+
+  bool Clipboard::is_empty()
+  {
+    return get().empty();
+  }
+
+  void Clipboard::set(const std::string& string)
+  {
+    SDL_SetClipboardText(string.data());
+  }
+}