/// <summary>
/// Substitute the numeric numbers in translated message with their orignal format in source message.
/// </summary>
/// <param name="translatedDocument">Translated document.</param>
private void SubstituteNumericPattern(TranslatedDocument translatedDocument)
{
var numericMatches = Regex.Matches(translatedDocument.SourceMessage, @"\d+", RegexOptions.Singleline);
foreach (Match numericMatch in numericMatches)
{
var srcIndex = Array.FindIndex(translatedDocument.SourceTokens, row => row == numericMatch.Groups[0].Value);
translatedDocument.TranslatedTokens = PostProcessingUtilities.KeepSourceWordInTranslation(translatedDocument.IndexedAlignment, translatedDocument.SourceTokens, translatedDocument.TranslatedTokens, srcIndex);
}
}
/// <summary>
/// Substitutes matched no translate pattern with the original token.
/// </summary>
/// <param name="translatedDocument">Translated document.</param>
/// <param name="pattern">The no translate pattern.</param>
private void SubstituteNoTranslatePattern(TranslatedDocument translatedDocument, string pattern)
{
// get the matched no translate pattern
var matchNoTranslate = Regex.Match(translatedDocument.SourceMessage, pattern, RegexOptions.Singleline | RegexOptions.IgnoreCase);
// calculate the boundaries of the pattern match
// ex : "mon nom est l'etat
// start index = 12
// length = 6
var noTranslateStartChrIndex = matchNoTranslate.Groups[1].Index;
// the length of the matched pattern without spaces , which will be used in determining the translated tokens that will be replaced by their original values
var noTranslateMatchLength = matchNoTranslate.Groups[1].Value.Replace(" ", string.Empty).Length;
var wrdIndx = 0;
var chrIndx = 0;
var newChrLengthFromMatch = 0;
var srcIndex = -1;
var newNoTranslateArrayLength = 1;
var sourceMessageCharacters = translatedDocument.SourceMessage.ToCharArray();
foreach (var wrd in translatedDocument.SourceTokens)
{
// if the beginning of the current word equals the beginning of the matched no trasnalate word, then assign the current word index to srcIndex
if (chrIndx == noTranslateStartChrIndex)
{
srcIndex = wrdIndx;
}
// the following code block does the folowing :
// - checks if a match wsa found
// - checks if this match length equals the starting matching token length, if yes then this is the only token to process,
// otherwise continue the loop and add the next token to the list of tokens to be processed
// ex : "mon nom est l'etat"
// tokens = {"mon", "nom", "est", "l'", "etat"}
// when the loop reaches the token "l'" then srcIndex will = 3, but we don't want to consider only the token "l'" as the no translate token,
// instead we want to match the whole "l'etat" string regardless how many tokens it contains ie regardless that "l'etat" is actually composed of 2 tokens "l'" and "etat"
// so what these condition is trying to do is make the necessary checks that we got all the matched pattern not just a part of it's tokens!
// checks if match was found or not, because srcIndex value changes only in case a match was found !
if (srcIndex != -1)
{
// checks if we found all the tokens that matches the pattern
if (newChrLengthFromMatch + translatedDocument.SourceTokens[wrdIndx].Length >= noTranslateMatchLength)
{
break;
}
// if the previous condition fails it means that the next token is also matched in the pattern, so we increase the size of the no translate words array by 1
newNoTranslateArrayLength += 1;
// increment newChrLengthFromMatch with the found word size
newChrLengthFromMatch += translatedDocument.SourceTokens[wrdIndx].Length;
}
// the following block of code is used to calculate the next token starting index which could have two cases
// the first case is that the current token is followed by a space in this case we increment the next chrIndx by 1 to get the next character after the space
// the second case is that the token is followed by the next token without spaces , in this case we calculate chrIndx as chrIndx += wrd.Length without incrementing
// assumption : The provided sourceMessage and sourceMessageCharacters doesn't contain any consecutive white spaces,
// in our use case this handling is done using the translator output itself using the following line of code in PreprocessMessage function:
// textToTranslate = Regex.Replace(textToTranslate, @"\s+", " ");//used to remove multiple spaces in input user message
if (chrIndx + wrd.Length < sourceMessageCharacters.Length && sourceMessageCharacters[chrIndx + wrd.Length] == ' ')
{
chrIndx += wrd.Length + 1;
}
else
{
chrIndx += wrd.Length;
}
wrdIndx++;
}
// if the loop ends and srcIndex then no match was found
if (srcIndex == -1)
{
return;
}
// add the no translate words to a new array
var wrdNoTranslate = new string[newNoTranslateArrayLength];
Array.Copy(translatedDocument.SourceTokens, srcIndex, wrdNoTranslate, 0, newNoTranslateArrayLength);
// loop for each of the no translate words and replace it's translation with it's origin
foreach (var srcWrd in wrdNoTranslate)
{
translatedDocument.TranslatedTokens = PostProcessingUtilities.KeepSourceWordInTranslation(translatedDocument.IndexedAlignment, translatedDocument.SourceTokens, translatedDocument.TranslatedTokens, srcIndex);
srcIndex++;
}
}