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Word wrapping as stream operations now.

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ADAM David Alan Martin
2023-10-14 02:03:37 -04:00
parent 046cf6d43f
commit 384eba5797
2 changed files with 107 additions and 84 deletions
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46
word_wrap.h
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@ -13,42 +13,22 @@ namespace Alepha::inline Cavorite ::detail:: word_wrap
{
std::string wordWrap( const std::string &text, std::size_t width, std::size_t nextLineOffset= 0 );
class WordWrapStreambuf;
struct StartWrap
{
std::size_t width;
std::size_t nextLineOffset;
explicit StartWrap( const std::size_t width, const std::size_t nextLineOffset= 0 ) : width( width ), nextLineOffset( nextLineOffset ) {}
};
constexpr struct EndWrap_t {} EndWrap;
}
class exports::WordWrapStreambuf
: public std::streambuf
inline namespace impl
{
public:
std::streambuf *underlying= nullptr;
std::size_t maximumWidth= 0;
std::size_t nextLineOffset= 0;
std::size_t currentLineLength= 0;
std::string currentWord;
void writeChar( const char ch );
void drain();
public:
int
overflow( const int ch ) override
{
if( ch == EOF ) throw std::logic_error( "EOF!" );
writeChar( ch );
return 1;
}
std::streamsize
xsputn( const char *const data, const std::streamsize amt ) override
{
for( std::streamsize i= 0; i< amt; ++i ) overflow( data[ i ] );
return amt;
}
};
std::ostream &operator << ( std::ostream &, StartWrap );
std::ostream &operator << ( std::ostream &, EndWrap_t );
}
}
namespace Alepha::Cavorite::inline exports::inline word_wrap