public StringBuffer Prepare(String src, StringPrepOptions options)
{
int ch;
String mapOut = Map(src, options);
UCharacterIterator iter = UCharacterIterator.GetInstance(mapOut);
UCharacterDirection direction = UCharacterDirectionExtensions.CharDirectionCount,
firstCharDir = UCharacterDirectionExtensions.CharDirectionCount;
int rtlPos = -1, ltrPos = -1;
bool rightToLeft = false, leftToRight = false;
while ((ch = iter.NextCodePoint()) != UCharacterIterator.Done)
{
if (transform.prohibitedSet.Contains(ch) == true && ch != 0x0020)
{
throw new StringPrepParseException("A prohibited code point was found in the input",
StringPrepErrorType.ProhibitedError,
iter.GetText(), iter.Index);
}
direction = UChar.GetDirection(ch);
if (firstCharDir == UCharacterDirectionExtensions.CharDirectionCount)
{
firstCharDir = direction;
}
if (direction == UCharacterDirection.LeftToRight)
{
leftToRight = true;
ltrPos = iter.Index - 1;
}
if (direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic)
{
rightToLeft = true;
rtlPos = iter.Index - 1;
}
}
// satisfy 2
if (leftToRight == true && rightToLeft == true)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(), (rtlPos > ltrPos) ? rtlPos : ltrPos);
}
//satisfy 3
if (rightToLeft == true &&
!((firstCharDir == UCharacterDirection.RightToLeft || firstCharDir == UCharacterDirection.RightToLeftArabic) &&
(direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic))
)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(), (rtlPos > ltrPos) ? rtlPos : ltrPos);
}
return(new StringBuffer(mapOut));
}
public void TestToString()
{
String[] name = { "Left-to-Right",
"Right-to-Left",
"European Number",
"European Number Separator",
"European Number Terminator",
"Arabic Number",
"Common Number Separator",
"Paragraph Separator",
"Segment Separator",
"Whitespace",
"Other Neutrals",
"Left-to-Right Embedding",
"Left-to-Right Override",
"Right-to-Left Arabic",
"Right-to-Left Embedding",
"Right-to-Left Override",
"Pop Directional Format",
"Non-Spacing Mark",
"Boundary Neutral",
"First Strong Isolate",
"Left-to-Right Isolate",
"Right-to-Left Isolate",
"Pop Directional Isolate",
"Unassigned" };
for (UCharacterDirection i = UCharacterDirection.LeftToRight;
// Placed <= because we need to consider 'Unassigned'
// when it goes out of bounds of UCharacterDirection
i <= UCharacterDirection.CharDirectionCount; i++)
{
if (!i.AsString().Equals(name[(int)i]))
{
Errln("Error toString for direction " + i + " expected " +
name[(int)i]);
}
}
}
/// <summary>
/// Converts a <see cref="UCharacterDirection"/> to an <see cref="int"/>.
/// Same as <c>(int)<paramref name="characterDirection"/></c>.
/// </summary>
/// <param name="characterDirection">This <see cref="UCharacterDirection"/>.</param>
/// <returns>This direction as <see cref="int"/>.</returns>
public static int ToInt32(this UCharacterDirection characterDirection)
{
return((int)characterDirection);
}
/// <summary>
/// Gets the name of the argument direction.
/// </summary>
/// <param name="dir">Direction type to retrieve name.</param>
/// <returns>Directional name.</returns>
/// <stable>ICU 2.1</stable>
public static string AsString(this UCharacterDirection dir)
{
switch (dir)
{
case UCharacterDirection.LeftToRight:
return("Left-to-Right");
case UCharacterDirection.RightToLeft:
return("Right-to-Left");
case UCharacterDirection.EuropeanNumber:
return("European Number");
case UCharacterDirection.EuropeanNumberSeparator:
return("European Number Separator");
case UCharacterDirection.EuropeanNumberTerminator:
return("European Number Terminator");
case UCharacterDirection.ArabicNumber:
return("Arabic Number");
case UCharacterDirection.CommonNumberSeparator:
return("Common Number Separator");
case UCharacterDirection.BlockSeparator:
return("Paragraph Separator");
case UCharacterDirection.SegmentSeparator:
return("Segment Separator");
case UCharacterDirection.WhiteSpaceNeutral:
return("Whitespace");
case UCharacterDirection.OtherNeutral:
return("Other Neutrals");
case UCharacterDirection.LeftToRightEmbedding:
return("Left-to-Right Embedding");
case UCharacterDirection.LeftToRightOverride:
return("Left-to-Right Override");
case UCharacterDirection.RightToLeftArabic:
return("Right-to-Left Arabic");
case UCharacterDirection.RightToLeftEmbedding:
return("Right-to-Left Embedding");
case UCharacterDirection.RightToLeftOverride:
return("Right-to-Left Override");
case UCharacterDirection.PopDirectionalFormat:
return("Pop Directional Format");
case UCharacterDirection.DirNonSpacingMark:
return("Non-Spacing Mark");
case UCharacterDirection.BoundaryNeutral:
return("Boundary Neutral");
case UCharacterDirection.FirstStrongIsolate:
return("First Strong Isolate");
case UCharacterDirection.LeftToRightIsolate:
return("Left-to-Right Isolate");
case UCharacterDirection.RightToLeftIsolate:
return("Right-to-Left Isolate");
case UCharacterDirection.PopDirectionalIsolate:
return("Pop Directional Isolate");
default:
return("Unassigned");
}
}
/*
* boolean isLabelSeparator(int ch){
* int result = getCodePointValue(ch);
* if( (result & 0x07) == LABEL_SEPARATOR){
* return true;
* }
* return false;
* }
*/
/*
* 1) Map -- For each character in the input, check if it has a mapping
* and, if so, replace it with its mapping.
*
* 2) Normalize -- Possibly normalize the result of step 1 using Unicode
* normalization.
*
* 3) Prohibit -- Check for any characters that are not allowed in the
* output. If any are found, return an error.
*
* 4) Check bidi -- Possibly check for right-to-left characters, and if
* any are found, make sure that the whole string satisfies the
* requirements for bidirectional strings. If the string does not
* satisfy the requirements for bidirectional strings, return an
* error.
* [Unicode3.2] defines several bidirectional categories; each character
* has one bidirectional category assigned to it. For the purposes of
* the requirements below, an "RandALCat character" is a character that
* has Unicode bidirectional categories "R" or "AL"; an "LCat character"
* is a character that has Unicode bidirectional category "L". Note
*
*
* that there are many characters which fall in neither of the above
* definitions; Latin digits (<U+0030> through <U+0039>) are examples of
* this because they have bidirectional category "EN".
*
* In any profile that specifies bidirectional character handling, all
* three of the following requirements MUST be met:
*
* 1) The characters in section 5.8 MUST be prohibited.
*
* 2) If a string contains any RandALCat character, the string MUST NOT
* contain any LCat character.
*
* 3) If a string contains any RandALCat character, a RandALCat
* character MUST be the first character of the string, and a
* RandALCat character MUST be the last character of the string.
*/
/// <summary>
/// Prepare the input buffer for use in applications with the given profile. This operation maps, normalizes(NFKC),
/// checks for prohibited and BiDi characters in the order defined by RFC 3454
/// depending on the options specified in the profile.
/// </summary>
/// <param name="src">A <see cref="UCharacterIterator"/> object containing the source string.</param>
/// <param name="options">A bit set of options:
/// <list type="bullet">
/// <item><term><see cref="StringPrepOptions.Default"/></term><description>Prohibit processing of unassigned code points in the input.</description></item>
/// <item><term><see cref="StringPrepOptions.AllowUnassigned"/></term><description>Treat the unassigned code points are in the input as normal Unicode code points.</description></item>
/// </list>
/// </param>
/// <returns>A <see cref="StringBuffer"/> containing the output.</returns>
/// <exception cref="StringPrepParseException">An exception occurs when parsing a string is invalid.</exception>
/// <stable>ICU 2.8</stable>
public StringBuffer Prepare(UCharacterIterator src, StringPrepOptions options)
{
// map
StringBuffer mapOut = Map(src, options);
StringBuffer normOut = mapOut;// initialize
if (doNFKC)
{
// normalize
normOut = Normalize(mapOut);
}
int ch;
char result;
UCharacterIterator iter = UCharacterIterator.GetInstance(normOut);
Values val = new Values();
#pragma warning disable 612, 618
UCharacterDirection direction = UCharacterDirection.CharDirectionCount,
firstCharDir = UCharacterDirection.CharDirectionCount;
#pragma warning restore 612, 618
int rtlPos = -1, ltrPos = -1;
bool rightToLeft = false, leftToRight = false;
while ((ch = iter.NextCodePoint()) != UCharacterIterator.DONE)
{
result = GetCodePointValue(ch);
GetValues(result, val);
if (val.type == PROHIBITED)
{
throw new StringPrepParseException("A prohibited code point was found in the input",
StringPrepErrorType.ProhibitedError, iter.GetText(), val.value);
}
if (checkBiDi)
{
direction = (UCharacterDirection)bdp.GetClass(ch);
#pragma warning disable 612, 618
if (firstCharDir == UCharacterDirection.CharDirectionCount)
#pragma warning restore 612, 618
{
firstCharDir = direction;
}
if (direction == UCharacterDirection.LeftToRight)
{
leftToRight = true;
ltrPos = iter.Index - 1;
}
if (direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic)
{
rightToLeft = true;
rtlPos = iter.Index - 1;
}
}
}
if (checkBiDi == true)
{
// satisfy 2
if (leftToRight == true && rightToLeft == true)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(),
(rtlPos > ltrPos) ? rtlPos : ltrPos);
}
//satisfy 3
if (rightToLeft == true &&
!((firstCharDir == UCharacterDirection.RightToLeft || firstCharDir == UCharacterDirection.RightToLeftArabic) &&
(direction == UCharacterDirection.RightToLeft || direction == UCharacterDirection.RightToLeftArabic))
)
{
throw new StringPrepParseException("The input does not conform to the rules for BiDi code points.",
StringPrepErrorType.CheckBiDiError, iter.GetText(),
(rtlPos > ltrPos) ? rtlPos : ltrPos);
}
}
return(normOut);
}
