/// <summary>
/// Tries to replace every char of the passed word to chars from the TryCharacters of the dictionary.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
int srcWordLen = word.Length;
string tryChars = dic.TryCharacters;
int tryCharsNum = tryChars.Length;
for (int i = 0; i < srcWordLen; ++i)
{
StringBuilder s = new StringBuilder(word);
for (int k = 0; k < tryCharsNum; ++k)
{
char ch = tryChars[k];
if (s[i] == ch)
{
continue;
}
s[i] = ch;
string newWord = s.ToString();
if (dic.IsWordCorrect(newWord))
{
if (!suggestedWords.ContainsKey(newWord))
{
suggestedWords.Add(newWord, new SpellSuggestion(newWord, spellChecker.EditDistanceWeights.ReplaceCharWeight));
}
}
}
}
}
/// <summary>
/// Applies replace patterns of the passed dictionary.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
var replacePatterns = dic.ReplacePatterns;
int n = replacePatterns.Count;
int p;
for (int i = 0; i < n; ++i)
{
var replacePattern = replacePatterns[i];
string searchChars = replacePattern.SearchChars;
string replaceChars = replacePattern.ReplaceChars;
int editDistance = 0;
string newWord = word;
p = 0;
while ((p = newWord.IndexOf(searchChars, p)) != -1)
{
newWord = newWord.Substring(0, p) + replaceChars + newWord.Substring(p + searchChars.Length);
p += replaceChars.Length;
editDistance += spellChecker.EditDistanceWeights.ReplaceCharWeight * Math.Max(searchChars.Length, replaceChars.Length);
if (dic.IsWordCorrect(newWord))
{
if (!suggestedWords.ContainsKey(newWord))
{
suggestedWords.Add(newWord, new SpellSuggestion(newWord, editDistance));
}
}
}
}
}
/// <summary>
/// Try to split the passed word onto 2 words.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
int wordLen = word.Length;
if (wordLen < 2)
{
return;
}
for (int i = 1; i < wordLen; ++i)
{
string word1 = word.Substring(0, i);
string word2 = word.Substring(i);
if (dic.IsWordCorrect(word1) && dic.IsWordCorrect(word2))
{
string newText = word1 + ' ' + word2;
if (!suggestedWords.ContainsKey(newText))
{
suggestedWords.Add(newText, new SpellSuggestion(newText, spellChecker.EditDistanceWeights.InsertCharWeight));
}
}
}
}
/// <summary>
/// Try to insert a character from TryCharacters into an every position.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
int wordLen = word.Length;
string tryChars = dic.TryCharacters;
int tryCharsNum = tryChars.Length;
for (int i = 0; i <= wordLen; ++i)
{
for (int k = 0; k < tryCharsNum; ++k)
{
string newWord = word.Insert(i, tryChars[k].ToString());
if (dic.IsWordCorrect(newWord))
{
if (!suggestedWords.ContainsKey(newWord))
{
suggestedWords.Add(newWord, new SpellSuggestion(newWord, spellChecker.EditDistanceWeights.InsertCharWeight));
}
}
}
}
}
/// <summary>
/// Tries to omit one by one char.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
int wordLen = word.Length;
if (wordLen <= 1)
{
return;
}
for (int i = 0; i < wordLen; ++i)
{
string newWord = word.Remove(i, 1);
if (dic.IsWordCorrect(newWord))
{
if (!suggestedWords.ContainsKey(newWord))
{
suggestedWords.Add(newWord, new SpellSuggestion(newWord, spellChecker.EditDistanceWeights.DeleteCharWeight));
}
}
}
}
/// <summary>
/// Tries to swap every pair of adjacent chars.
/// </summary>
/// <param name="word">source word</param>
/// <param name="suggestedWords">generated suggested words will be placed here</param>
/// <param name="dic"></param>
public override void Apply(string word, Dictionary <string, SpellSuggestion> suggestedWords, SpellDictionary dic)
{
int wordLen = word.Length;
for (int i = 0; i < wordLen - 1; ++i)
{
// swapping...
StringBuilder s = new StringBuilder(word);
char t = s[i];
s[i] = s[i + 1];
s[i + 1] = t;
string newWord = s.ToString();
if (dic.IsWordCorrect(newWord))
{
if (!suggestedWords.ContainsKey(newWord))
{
suggestedWords.Add(newWord, new SpellSuggestion(newWord, spellChecker.EditDistanceWeights.SwapCharWeight));
}
}
}
}