Method WrapText

src/SFGUI/Label.cpp:70–133

}

void Label::WrapText() {
	const std::string& font_name( Context::Get().GetEngine().GetProperty<std::string>( "FontName", shared_from_this() ) );
	unsigned int font_size( Context::Get().GetEngine().GetProperty<unsigned int>( "FontSize", shared_from_this() ) );
	const sf::Font& font( *Context::Get().GetEngine().GetResourceManager().GetFont( font_name ) );

	std::u32string wrapped_text;
	std::u32string text( m_text.begin(), m_text.end() );

	std::u32string line;

	while( !text.empty() ) {
		auto next_newline = text.find( L'\n' );

		line = text.substr( 0, next_newline );

		if( next_newline != std::u32string::npos ) {
			text.erase( 0, next_newline + 1 );
		}
		else {
			text.clear();
		}

		if( !wrapped_text.empty() ) {
			wrapped_text += L'\n';
		}

		// Check if line needs to be wrapped.
		if( Context::Get().GetEngine().GetTextStringMetrics( line, font, font_size ).x <= GetAllocation().size.x ) {
			wrapped_text += line;
		}
		else {
			// Line needs to be wrapped.
			while( !line.empty() ) {
				auto last_space = line.size();

				while( Context::Get().GetEngine().GetTextStringMetrics( line.substr( 0, last_space ), font, font_size ).x > GetAllocation().size.x ) {
					last_space = line.find_last_of( L' ', last_space - 1 );

					if( last_space == std::u32string::npos ) {
						wrapped_text += line;
						line.clear();
						break;
					}
				}

				if( last_space != std::u32string::npos ) {
					wrapped_text += line.substr( 0, last_space );
					line.erase( 0, last_space );
				}

				if( !line.empty() ) {
					wrapped_text += L'\n';

					// If this is a new line remove the leading space.
					if( line[0] == L' ' ) {
						line.erase( 0, 1 );
					}
				}