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#pragma once
#include "nes/common/types.hh"
#include "nes/common/span.hh"
#include "nes/common/status.hh"
#include <string_view>
namespace nes
{
class path_view;
} // namespace nes;
namespace nes::app
{
/// A file browser that has a current directory whose items are iterated.
class file_browser
{
public:
static constexpr auto max_name_length = u32{ 64 };
enum class item_type
{
directory,
file,
};
class item
{
item_type type_{ item_type::directory };
char name_[max_name_length + 1]{};
public:
explicit item() = default;
explicit item(item_type const type, std::string_view const name)
: type_{ type }
{
std::copy_n(name.begin(), std::min(static_cast<u32>(name.length()), max_name_length), name_);
}
auto get_type() const -> item_type { return type_; }
auto get_name() const -> std::string_view { return name_; }
};
virtual ~file_browser() = default;
file_browser(file_browser const&) = delete;
file_browser(file_browser&&) = delete;
auto operator=(file_browser const&) -> file_browser& = delete;
auto operator=(file_browser&&) -> file_browser& = delete;
/// Get the path components of the current working directory.
virtual auto get_path() const -> path_view = 0;
/// Go to directory entry at the given index.
virtual auto seek(u32) -> void = 0;
/// Read the directory entry at the current index.
virtual auto read_next(item* out_item) -> bool = 0;
/// Change the current working directory to the parent directory.
virtual auto navigate_up() -> status = 0;
/// Change the current working directory to an item.
virtual auto navigate(std::string_view) -> status = 0;
/// Load a file in the current working directory into memory.
virtual auto load(std::string_view, span<u8>, u32* out_length) -> status = 0;
protected:
explicit file_browser() = default;
};
} // namespace nes::app
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