/// <summary>
/// Fixes the provided string
/// </summary>
/// <param name="input">Text to fix</param>
/// <param name="output">Fixed text</param>
/// <param name="fixTextTags"></param>
/// <param name="preserveNumbers"></param>
/// <param name="farsi"></param>
/// <returns>Fixed text</returns>
public static void FixRTL(
string input,
FastStringBuilder output,
bool farsi = true,
bool fixTextTags = true,
bool preserveNumbers = false)
{
inputBuilder.SetValue(input);
TashkeelFixer.RemoveTashkeel(inputBuilder);
// The shape of the letters in shapeFixedLetters is fixed according to their position in word. But the flow of the text is not fixed.
GlyphFixer.Fix(inputBuilder, glyphFixerOutput, preserveNumbers, farsi);
//Restore tashkeel to their places.
TashkeelFixer.RestoreTashkeel(glyphFixerOutput);
// Fix flow of the text and put the result in FinalLetters field
LigatureFixer.Fix(glyphFixerOutput, output, farsi, fixTextTags, preserveNumbers);
if (fixTextTags)
{
RichTextFixer.Fix(output);
}
inputBuilder.Clear();
}
/// <summary>
/// Fixes the shape of letters based on their position.
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
/// <param name="preserveNumbers"></param>
/// <param name="farsi"></param>
/// <returns></returns>
public static void Fix(FastStringBuilder input, FastStringBuilder output, bool preserveNumbers, bool farsi, bool fixTextTags)
{
FixYah(input, farsi);
output.SetValue(input);
for (int i = 0; i < input.Length; i++)
{
bool skipNext = false;
int iChar = input.Get(i);
// For special Lam Letter connections.
if (iChar == (int)ArabicGeneralLetters.Lam)
{
if (i < input.Length - 1)
{
skipNext = HandleSpecialLam(input, output, i);
if (skipNext)
{
iChar = output.Get(i);
}
}
}
// We don't want to fix tatweel or zwnj character
if (iChar == (int)ArabicGeneralLetters.ArabicTatweel ||
iChar == (int)ArabicGeneralLetters.ZeroWidthNoJoiner)
{
continue;
}
if (iChar < 0xFFFF && TextUtils.IsGlyphFixedArabicCharacter((char)iChar))
{
char converted = GlyphTable.Convert((char)iChar);
if (IsMiddleLetter(input, i))
{
output.Set(i, (char)(converted + 3));
}
else if (IsFinishingLetter(input, i))
{
output.Set(i, (char)(converted + 1));
}
else if (IsLeadingLetter(input, i))
{
output.Set(i, (char)(converted + 2));
}
}
// If this letter as Lam and special Lam-Alef connection was made, We want to skip the Alef
// (Lam-Alef occupies 1 space)
if (skipNext)
{
i++;
}
}
if (!preserveNumbers)
{
if (fixTextTags)
{
FixNumbersOutsideOfTags(output, farsi);
}
else
{
FixNumbers(output, farsi);
}
}
}