// Unloads translations.
public void Unload()
{
if (Messages != null)
{
Expr = null;
Messages.Clear();
NPlurals = 0;
Messages = null;
}
}
// Loads translations into catalog.
// Returns true if translations were successfuly loaded.
public bool Load()
{
// Already loaded.
if (Messages != null)
{
return(true);
}
try
{
Parser parser = new Parser();
string file = System.IO.Path.Combine(Path, MessagesFilename);
using (StreamReader reader = new StreamReader(file))
{
Messages = new Dictionary <string, string[]>();
string line;
while ((line = reader.ReadLine()) != null)
{
if (parser.ParseLine(line))
{
AddMessage(parser);
}
}
if (parser.ParseLine(""))
{
AddMessage(parser);
}
// Set plural forms.
NPlurals = parser.NPlurals;
Expr = parser.Plural;
return(true);
}
}
catch
{
Messages = null;
}
return(false);
}
// Process header entry.
private void Header()
{
// Ignore duplicit header.
if (HasHeader)
{
return;
}
HasHeader = true;
string[] fields = Strings[0].TrimEnd().Split('\n');
foreach (string field in fields)
{
if (field.StartsWith("Plural-Forms:"))
{
string value = field.Replace(" ", "").Substring(13);
if (value.Length == 0) // No value.
{
return;
}
string[] assignments = value.ToLowerInvariant().TrimEnd(';').Split(';');
foreach (string assignment in assignments)
{
if (assignment.StartsWith("nplurals="))
{
if (!uint.TryParse(assignment.Substring(9), out NPlurals))
{
// Invalid nplurals value.
Plural = null;
return;
}
}
else if (assignment.StartsWith("plural="))
{
try
{
Plural = new NExpression(assignment.Substring(7));
}
catch
{
// Invalid plural expression.
NPlurals = 0;
return;
}
}
}
break;
}
}
// Ignore partial Plural-Forms field (i.e. missing either nplurals or plural expression).
if (NPlurals == 0)
{
Plural = null;
}
if (Plural == null)
{
NPlurals = 0;
}
}