private string[] FigureOutGroupNames(ResponseMatches clientResponse)
{
if (clientResponse.Matches == null)
{
return(new string[0]);
}
var possible_indices = new Dictionary <string, HashSet <int> >( );
foreach (var m in clientResponse.Matches)
{
if (m.Groups == null)
{
continue;
}
foreach (var g in m.Groups)
{
string group_name = g.Key;
int[] group_index = g.Value;
var possible_indices_this_group = new List <int>( );
for (var i = 1; i < m.Indices.Count; ++i)
{
if (m.Indices[i] == null)
{
continue;
}
if (group_index[0] == m.Indices[i][0] && group_index[1] == m.Indices[i][1])
{
possible_indices_this_group.Add(i);
}
}
HashSet <int> existing_possible_indices;
if (!possible_indices.TryGetValue(group_name, out existing_possible_indices))
{
possible_indices.Add(group_name, possible_indices_this_group.ToHashSet( ));
}
else
{
possible_indices[group_name].UnionWith(possible_indices_this_group);
}
}
}
// order by number of possibilities
var ordered = possible_indices.OrderBy(kv => kv.Value.Count).ToArray( );
//// exclude previous, more probable possibilities
//for( int i = 1; i < ordered.Length; ++i )
//{
// for( int j = 0; j < i; ++j )
// {
// ordered[i].Value.ExceptWith( ordered[j].Value );
// }
//}
int max_group_number = ordered.Any( ) ? ordered.SelectMany(kv => kv.Value).Max( ) : 0;
string[] distributed_names = new string[max_group_number + 1];
// keep one (first) possibility, which is not used yet
for (int i = 0; i < ordered.Length; ++i)
{
foreach (int k in ordered[i].Value)
{
if (distributed_names[k] == null)
{
distributed_names[k] = ordered[i].Key;
break;
}
}
}
return(distributed_names);
}
public RegexMatches Matches(string text, ICancellable cnc)
{
string flags = string.Concat(
Options.i ? "i" : "",
Options.m ? "m" : "",
Options.s ? "s" : "",
Options.u ? "u" : ""
);
string stdout_contents;
string stderr_contents;
Action <StreamWriter> stdin_writer = new Action <StreamWriter>(sw =>
{
sw.Write("m \"");
WriteJavaScriptString(sw, Pattern);
sw.Write("\" \"");
sw.Write(flags);
sw.Write("\" \"");
WriteJavaScriptString(sw, text);
sw.Write("\"");
});
if (!ProcessUtilities.InvokeExe(cnc, GetClientExePath( ), "i", stdin_writer, out stdout_contents, out stderr_contents, EncodingEnum.UTF8))
{
return(RegexMatches.Empty); // (cancelled)
}
if (!string.IsNullOrWhiteSpace(stderr_contents))
{
throw new Exception(stderr_contents);
}
ResponseMatches client_response = JsonSerializer.Deserialize <ResponseMatches>(stdout_contents);
if (client_response == null)
{
throw new Exception("JavaScript failed.");
}
if (!string.IsNullOrWhiteSpace(client_response.Error))
{
throw new Exception(client_response.Error);
}
string[] distributed_names = FigureOutGroupNames(client_response);
Debug.Assert(distributed_names[0] == null);
SimpleTextGetter stg = new SimpleTextGetter(text);
List <IMatch> matches = new List <IMatch>( );
foreach (var cm in client_response.Matches)
{
if (cm.Indices.Any( ))
{
var start = cm.Indices[0][0];
var end = cm.Indices[0][1];
var sm = SimpleMatch.Create(start, end - start, stg);
sm.AddGroup(sm.Index, sm.Length, true, "0"); // (default group)
for (int i = 1; i < cm.Indices.Count; ++i)
{
string name;
if (i < distributed_names.Length && distributed_names[i] != null)
{
name = distributed_names[i];
}
else
{
name = i.ToString(CultureInfo.InvariantCulture);
}
var g = cm.Indices[i];
if (g == null)
{
sm.AddGroup(-1, 0, false, name);
}
else
{
start = cm.Indices[i][0];
end = cm.Indices[i][1];
sm.AddGroup(start, end - start, true, name);
}
}
matches.Add(sm);
}
}
return(new RegexMatches(matches.Count, matches));
}