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/*
* Created by Phil on 18/4/2013.
* Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
// Only use header guard if we are not using an outer namespace
#ifndef CLICHE_TBC_TEXT_FORMAT_OUTER_NAMESPACE
# ifdef TWOBLUECUBES_TEXT_FORMAT_H_INCLUDED
# ifndef TWOBLUECUBES_TEXT_FORMAT_H_ALREADY_INCLUDED
# define TWOBLUECUBES_TEXT_FORMAT_H_ALREADY_INCLUDED
# endif
# else
# define TWOBLUECUBES_TEXT_FORMAT_H_INCLUDED
# endif
#endif
#ifndef TWOBLUECUBES_TEXT_FORMAT_H_ALREADY_INCLUDED
#include <string>
#include <vector>
#include <sstream>
// Use optional outer namespace
#ifdef CLICHE_TBC_TEXT_FORMAT_OUTER_NAMESPACE
namespace CLICHE_TBC_TEXT_FORMAT_OUTER_NAMESPACE {
#endif
namespace Tbc {
#ifdef TBC_TEXT_FORMAT_CONSOLE_WIDTH
const unsigned int consoleWidth = TBC_TEXT_FORMAT_CONSOLE_WIDTH;
#else
const unsigned int consoleWidth = 80;
#endif
struct TextAttributes {
TextAttributes()
: initialIndent( std::string::npos ),
indent( 0 ),
width( consoleWidth-1 )
{}
TextAttributes& setInitialIndent( std::size_t _value ) { initialIndent = _value; return *this; }
TextAttributes& setIndent( std::size_t _value ) { indent = _value; return *this; }
TextAttributes& setWidth( std::size_t _value ) { width = _value; return *this; }
std::size_t initialIndent; // indent of first line, or npos
std::size_t indent; // indent of subsequent lines, or all if initialIndent is npos
std::size_t width; // maximum width of text, including indent. Longer text will wrap
};
class Text {
public:
Text( std::string const& _str, TextAttributes const& _attr = TextAttributes() )
: attr( _attr )
{
const std::string wrappableBeforeChars = "[({<\t";
const std::string wrappableAfterChars = "])}>-,./|\\";
const std::string wrappableInsteadOfChars = " \n\r";
std::string indent = _attr.initialIndent != std::string::npos
? std::string( _attr.initialIndent, ' ' )
: std::string( _attr.indent, ' ' );
typedef std::string::const_iterator iterator;
iterator it = _str.begin();
const iterator strEnd = _str.end();
while( it != strEnd ) {
if( lines.size() >= 1000 ) {
lines.push_back( "... message truncated due to excessive size" );
return;
}
std::string suffix;
std::size_t width = (std::min)( static_cast<size_t>( strEnd-it ), _attr.width-static_cast<size_t>( indent.size() ) );
iterator itEnd = it+width;
iterator itNext = _str.end();
iterator itNewLine = std::find( it, itEnd, '\n' );
if( itNewLine != itEnd )
itEnd = itNewLine;
if( itEnd != strEnd ) {
bool foundWrapPoint = false;
iterator findIt = itEnd;
do {
if( wrappableAfterChars.find( *findIt ) != std::string::npos && findIt != itEnd ) {
itEnd = findIt+1;
itNext = findIt+1;
foundWrapPoint = true;
}
else if( findIt > it && wrappableBeforeChars.find( *findIt ) != std::string::npos ) {
itEnd = findIt;
itNext = findIt;
foundWrapPoint = true;
}
else if( wrappableInsteadOfChars.find( *findIt ) != std::string::npos ) {
itNext = findIt+1;
itEnd = findIt;
foundWrapPoint = true;
}
if( findIt == it )
break;
else
--findIt;
}
while( !foundWrapPoint );
if( !foundWrapPoint ) {
// No good wrap char, so we'll break mid word and add a hyphen
--itEnd;
itNext = itEnd;
suffix = "-";
}
else {
while( itEnd > it && wrappableInsteadOfChars.find( *(itEnd-1) ) != std::string::npos )
--itEnd;
}
}
lines.push_back( indent + std::string( it, itEnd ) + suffix );
if( indent.size() != _attr.indent )
indent = std::string( _attr.indent, ' ' );
it = itNext;
}
}
typedef std::vector<std::string>::const_iterator const_iterator;
const_iterator begin() const { return lines.begin(); }
const_iterator end() const { return lines.end(); }
std::string const& last() const { return lines.back(); }
std::size_t size() const { return lines.size(); }
std::string const& operator[]( std::size_t _index ) const { return lines[_index]; }
std::string toString() const {
std::ostringstream oss;
oss << *this;
return oss.str();
}
inline friend std::ostream& operator << ( std::ostream& _stream, Text const& _text ) {
for( Text::const_iterator it = _text.begin(), itEnd = _text.end();
it != itEnd; ++it ) {
if( it != _text.begin() )
_stream << "\n";
_stream << *it;
}
return _stream;
}
private:
std::string str;
TextAttributes attr;
std::vector<std::string> lines;
};
} // end namespace Tbc
#ifdef CLICHE_TBC_TEXT_FORMAT_OUTER_NAMESPACE
} // end outer namespace
#endif
#endif // TWOBLUECUBES_TEXT_FORMAT_H_ALREADY_INCLUDED
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