Method create_from_string

player/NymphCastPlayer/litehtml/src/media_query.cpp:19–100

}

litehtml::media_query::ptr litehtml::media_query::create_from_string(const tstring& str, const std::shared_ptr<document>& doc)
{
	media_query::ptr query = std::make_shared<media_query>();

	string_vector tokens;
	split_string(str, tokens, _t(" \t\r\n"), _t(""), _t("("));

	for(string_vector::iterator tok = tokens.begin(); tok != tokens.end(); tok++)
	{
		if((*tok) == _t("not"))
		{
			query->m_not = true;
		} else if(tok->at(0) == _t('('))
		{
			tok->erase(0, 1);
			if(tok->at(tok->length() - 1) == _t(')'))
			{
				tok->erase(tok->length() - 1, 1);
			}
			media_query_expression expr;
			string_vector expr_tokens;
			split_string((*tok), expr_tokens, _t(":"));
			if(!expr_tokens.empty())
			{
				trim(expr_tokens[0]);
				expr.feature = (media_feature) value_index(expr_tokens[0], media_feature_strings, media_feature_none);
				if(expr.feature != media_feature_none)
				{
					if(expr_tokens.size() == 1)
					{
						expr.check_as_bool = true;
					} else
					{
						trim(expr_tokens[1]);
						expr.check_as_bool = false;
						if(expr.feature == media_feature_orientation)
						{
							expr.val = value_index(expr_tokens[1], media_orientation_strings, media_orientation_landscape);
						} else
						{
							tstring::size_type slash_pos = expr_tokens[1].find(_t('/'));
							if( slash_pos != tstring::npos )
							{
								tstring val1 = expr_tokens[1].substr(0, slash_pos);
								tstring val2 = expr_tokens[1].substr(slash_pos + 1);
								trim(val1);
								trim(val2);
								expr.val = t_atoi(val1.c_str());
								expr.val2 = t_atoi(val2.c_str());
							} else
							{
								css_length length;
								length.fromString(expr_tokens[1]);
								if(length.units() == css_units_dpcm)
								{
									expr.val = (int) (length.val() * 2.54);
								} else if(length.units() == css_units_dpi)
								{