HexEditor: Add get_byte() method to HexEditor class

Author: https://github.com/tslater2006
Commit: 604557c71b
Pull-request: https://github.com/SerenityOS/serenity/pull/12861
Reviewed-by: https://github.com/MacDue
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/kleinesfilmroellchen ✅

Userland/Applications/HexEditor/HexEditor.cpp

@@ -229,6 +229,14 @@ void HexEditor::set_content_length(size_t length)
     set_content_size({ static_cast<int>(newWidth), static_cast<int>(newHeight) });
 }
 
+Optional<u8> HexEditor::get_byte(size_t position)
+{
+    if (position < m_document->size())
+        return m_document->get(position).value;
+
+    return {};
+}
+
 void HexEditor::mousedown_event(GUI::MouseEvent& event)
 {
     if (event.button() != GUI::MouseButton::Primary) {

Userland/Applications/HexEditor/HexEditor.h

@@ -39,6 +39,7 @@ public:
     bool open_new_file(size_t size);
     void open_file(NonnullRefPtr<Core::File> file);
     void fill_selection(u8 fill_byte);
+    Optional<u8> get_byte(size_t position);
     bool save_as(NonnullRefPtr<Core::File>);
     bool save();