/// <summary>
/// English letters, numbers and punctuation characters are ignored. This checks if the ch is an ignored character.
/// </summary>
/// <param name="ch">The character to be checked for skipping</param>
/// <returns>True if the character should be ignored, false if it should not be ignored.</returns>
internal static bool IsIgnoredCharacter(char ch)
{
return(char.IsPunctuation(ch) ||
char.IsNumber(ch) ||
char.IsLower(ch) ||
char.IsUpper(ch) ||
char.IsSymbol(ch) ||
!ArabicTable.IsIsolatedForm(ch));
}
/// <summary>
/// Converts a string to a form in which the sting will be displayed correctly for arabic text.
/// </summary>
/// <param name="str">String to be converted. Example: "Aaa"</param>
/// <returns>Converted string. Example: "aa aaa A" without the spaces.</returns>
internal static string FixLine(string str)
{
List <TashkeelLocation> tashkeelLocation;
string originString = RemoveTashkeel(str, out tashkeelLocation);
char[] lettersOrigin = originString.ToCharArray();
char[] lettersFinal = originString.ToCharArray();
for (int i = 0; i < lettersOrigin.Length; i++)
{
lettersOrigin[i] = (char)ArabicTable.Convert(lettersOrigin[i]);
}
for (int i = 0; i < lettersOrigin.Length; i++)
{
bool skip = false;
// For special Lam Letter connections.
if (lettersOrigin[i] == (char)IsolatedArabicLetters.Lam && i < lettersOrigin.Length - 1)
{
skip = FixSpecialLam(lettersOrigin, i, lettersFinal);
}
if (!IsIgnoredCharacter(lettersOrigin[i]))
{
if (IsMiddleLetter(lettersOrigin, i))
{
lettersFinal[i] = (char)(lettersOrigin[i] + 3);
}
else if (IsFinishingLetter(lettersOrigin, i))
{
lettersFinal[i] = (char)(lettersOrigin[i] + 1);
}
else if (IsLeadingLetter(lettersOrigin, i))
{
lettersFinal[i] = (char)(lettersOrigin[i] + 2);
}
}
if (skip)
{
i++;
}
//chaining numbers to hindu
if (useHinduNumbers && lettersOrigin[i] >= 0x0030 && lettersOrigin[i] <= 0x0039)
{
lettersFinal[i] = (char)(lettersOrigin[i] + 0x0630);
}
}
//Return the Tashkeel to their places.
if (showTashkeel)
{
lettersFinal = ReturnTashkeel(lettersFinal, tashkeelLocation);
}
List <char> list = new List <char>();
List <char> numberList = new List <char>();
for (int i = lettersFinal.Length - 1; i >= 0; i--)
{
if (char.IsPunctuation(lettersFinal[i]) && i > 0 && i < lettersFinal.Length - 1 &&
(char.IsPunctuation(lettersFinal[i - 1]) || char.IsPunctuation(lettersFinal[i + 1])))
{
if (lettersFinal[i] == '(')
{
list.Add(')');
}
else if (lettersFinal[i] == ')')
{
list.Add('(');
}
else if (lettersFinal[i] == '<')
{
list.Add('>');
}
else if (lettersFinal[i] == '>')
{
list.Add('<');
}
else if (lettersFinal[i] == '[')
{
list.Add(']');
}
else if (lettersFinal[i] == ']')
{
list.Add('[');
}
else if (lettersFinal[i] != 0xFFFF)
{
list.Add(lettersFinal[i]);
}
}
// For cases where english words and arabic are mixed. This allows for using arabic, english and numbers in one sentence.
else if (lettersFinal[i] == ' ' && i > 0 && i < lettersFinal.Length - 1 &&
(char.IsLower(lettersFinal[i - 1]) || char.IsUpper(lettersFinal[i - 1]) || char.IsNumber(lettersFinal[i - 1])) &&
(char.IsLower(lettersFinal[i + 1]) || char.IsUpper(lettersFinal[i + 1]) || char.IsNumber(lettersFinal[i + 1])))
{
numberList.Add(lettersFinal[i]);
}
else if (char.IsNumber(lettersFinal[i]) || char.IsLower(lettersFinal[i]) ||
char.IsUpper(lettersFinal[i]) || char.IsSymbol(lettersFinal[i]) ||
char.IsPunctuation(lettersFinal[i])) // || lettersFinal[i] == '^') //)
{
if (lettersFinal[i] == '(')
{
numberList.Add(')');
}
else if (lettersFinal[i] == ')')
{
numberList.Add('(');
}
else if (lettersFinal[i] == '<')
{
numberList.Add('>');
}
else if (lettersFinal[i] == '>')
{
numberList.Add('<');
}
else if (lettersFinal[i] == '[')
{
list.Add(']');
}
else if (lettersFinal[i] == ']')
{
list.Add('[');
}
else
{
numberList.Add(lettersFinal[i]);
}
}
else if ((lettersFinal[i] >= (char)0xD800 && lettersFinal[i] <= (char)0xDBFF) ||
(lettersFinal[i] >= (char)0xDC00 && lettersFinal[i] <= (char)0xDFFF))
{
numberList.Add(lettersFinal[i]);
}
else
{
if (numberList.Count > 0)
{
for (int j = 0; j < numberList.Count; j++)
{
list.Add(numberList[numberList.Count - 1 - j]);
}
numberList.Clear();
}
if (lettersFinal[i] != 0xFFFF)
{
list.Add(lettersFinal[i]);
}
}
}
if (numberList.Count > 0)
{
for (int j = 0; j < numberList.Count; j++)
{
list.Add(numberList[numberList.Count - 1 - j]);
}
numberList.Clear();
}
// Moving letters from a list to an array.
lettersFinal = new char[list.Count];
for (int i = 0; i < lettersFinal.Length; i++)
{
lettersFinal[i] = list[i];
}
str = new string(lettersFinal);
return(str);
}