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#ifndef __NCPP_READER_HH
#define __NCPP_READER_HH
#include <notcurses/notcurses.h>
#include "NCAlign.hh"
#include "Plane.hh"
#include "Utilities.hh"
#include "Widget.hh"
namespace ncpp
{
class NCPP_API_EXPORT Reader : public Widget
{
public:
explicit Reader (Plane *plane, const ncreader_options *opts)
: Widget (Utilities::get_notcurses_cpp (plane))
{
ensure_valid_plane (plane);
common_init (Utilities::to_ncplane (plane), opts);
take_plane_ownership (plane);
}
explicit Reader (Plane &plane, const ncreader_options *opts)
: Widget (Utilities::get_notcurses_cpp (plane))
{
ensure_valid_plane (plane);
common_init (Utilities::to_ncplane (plane), opts);
take_plane_ownership (plane);
}
~Reader ()
{
if (!is_notcurses_stopped ())
ncreader_destroy (reader, nullptr);
}
bool clear () const NOEXCEPT_MAYBE
{
bool ret = ncreader_clear (reader) != 0;
return error_guard_cond<bool, bool> (ret, ret);
}
//
// None of the move* methods should throw since their return value (0 - moved, -1 - not moved) appear to be
// purely informational, not errors per se. If we had `can_move*` functions then `move*` could throw exceptions,
// potentially.
//
int move_left () const noexcept
{
return ncreader_move_left (reader);
}
int move_right () const noexcept
{
return ncreader_move_right (reader);
}
int move_up () const noexcept
{
return ncreader_move_up (reader);
}
int move_down () const noexcept
{
return ncreader_move_down (reader);
}
bool write_egc (const char *egc) const NOEXCEPT_MAYBE
{
return error_guard (ncreader_write_egc (reader, egc), -1);
}
char* get_contents () const noexcept
{
return ncreader_contents(reader);
}
Plane* get_plane () const noexcept
{
return Plane::map_plane (ncreader_plane (reader));
}
private:
void common_init (ncplane *n, const ncreader_options *opts)
{
reader = ncreader_create (n, opts);
if (reader == nullptr)
throw init_error ("Notcurses failed to create a new reader");
}
private:
ncreader *reader;
};
}
#endif
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