public static media_query create_from_string(string str, document doc)
{
var query = new media_query();
var tokens = new List <string>();
html.split_string(str, tokens, " \t\r\n", "", "(");
for (var i = 0; i < tokens.Count; i++)
{
var tok = tokens[i];
if (tok == "not")
{
query._not = true;
}
else if (tok[0] == '(')
{
tok = tok.Substring(1);
if (tok[tok.Length - 1] == ')')
{
tok = tok.Remove(tok.Length - 1, 1);
}
var expr = new media_query_expression();
var expr_tokens = new List <string>();
html.split_string(tok, expr_tokens, ":");
if (expr_tokens.Count != 0)
{
expr_tokens[0] = expr_tokens[0].Trim();
expr.feature = (media_feature)html.value_index(expr_tokens[0], types.media_feature_strings, (int)media_feature.none);
if (expr.feature != media_feature.none)
{
if (expr_tokens.Count == 1)
{
expr.check_as_bool = true;
}
else
{
expr_tokens[1] = expr_tokens[1].Trim();
expr.check_as_bool = false;
if (expr.feature == media_feature.orientation)
{
expr.val = html.value_index(expr_tokens[1], types.media_orientation_strings, (int)media_orientation.landscape);
}
else
{
var slash_pos = expr_tokens[1].IndexOf('/');
if (slash_pos != -1)
{
var val1 = expr_tokens[1].Substring(0, slash_pos).Trim();
var val2 = expr_tokens[1].Substring(slash_pos + 1).Trim();
expr.val = int.TryParse(val1, out var v) ? v : 0;
expr.val2 = int.TryParse(val2, out v) ? v : 0;
}
else
{
var length = new css_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)
{
expr.val = (int)(length.val * 2.54);
}
else
{
if (doc != null)
{
doc.cvt_units(length, doc.container.get_default_font_size());
}
expr.val = (int)length.val;
}
}
}
}
query._expressions.Add(expr);
}
}
}
else
{
query._media_type = (media_type)html.value_index(tok, types.media_type_strings, (int)media_type.all);
}
}
return(query);
}
public media_query(media_query val)
{
_not = val._not;
_expressions = val._expressions;
_media_type = val._media_type;
}