/// <summary>
/// Implements <see cref="M:IBM.ICU.Text.Transliterator.HandleTransliterate(IBM.ICU.Text.Replaceable, null, System.Boolean)"/>.
/// </summary>
///
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position index,
bool incremental)
{
// Our caller (filteredTransliterate) has already narrowed us
// to an unfiltered run. Delete it.
text.Replace(index.start, index.limit, "");
int len = index.limit - index.start;
index.contextLimit -= len;
index.limit -= len;
}
/// <summary>
/// Implements <see cref="M:IBM.ICU.Text.Transliterator.HandleTransliterate(IBM.ICU.Text.Replaceable, null, System.Boolean)"/>.
/// </summary>
///
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position pos,
bool incremental)
{
int start = pos.start;
int limit = pos.limit;
StringBuilder buf = new StringBuilder(prefix);
int prefixLen = prefix.Length;
bool redoPrefix = false;
while (start < limit)
{
int c = (grokSupplementals) ? (int)(text.Char32At(start)) : (int)(text.CharAt(start));
int charLen = (grokSupplementals) ? IBM.ICU.Text.UTF16.GetCharCount(c) : 1;
if ((c & -65536) != 0 && supplementalHandler != null)
{
buf.Length = 0;
buf.Append(supplementalHandler.prefix);
IBM.ICU.Impl.Utility.AppendNumber(buf, c, supplementalHandler.radix,
supplementalHandler.minDigits);
buf.Append(supplementalHandler.suffix);
redoPrefix = true;
}
else
{
if (redoPrefix)
{
buf.Length = 0;
buf.Append(prefix);
redoPrefix = false;
}
else
{
buf.Length = prefixLen;
}
IBM.ICU.Impl.Utility.AppendNumber(buf, c, radix, minDigits);
buf.Append(suffix);
}
text.Replace(start, start + charLen, buf.ToString());
start += buf.Length;
limit += buf.Length - charLen;
}
pos.contextLimit += limit - pos.limit;
pos.limit = limit;
pos.start = start;
}
/// <summary>
/// Converts the range from lastSafe to limit.
/// </summary>
///
/// <param name="verify">If non-null, check to see that all replacement characters arein it. If not, abort the conversion and returnInteger.MIN_VALUE.</param>
/// <returns>return the delta in length (new - old), or Integer.MIN_VALUE if
/// the verify aborted.</returns>
internal int Convert(Replaceable text, int lastSafe, int limit, UnicodeSet verify)
{
// System.out.println("t: " +
// com.ibm.icu.impl.Utility.hex(text.toString()) + ", s: " + lastSafe +
// ", l: " + limit);
int len = limit - lastSafe;
String input = null;
lock (buffer) {
if (buffer.Length < len)
{
buffer = new char[len]; // rare, and we don't care if we grow
// too large
}
text.GetChars(lastSafe, limit, buffer, 0);
input = new String(buffer, 0, len); // TODO: fix normalizer to take
// char[]
}
String output = IBM.ICU.Text.Normalizer.Normalize(input, mode, options);
// verify OK, if specified
if (verify != null)
{
bool skip = !skippable.ContainsAll(output);
if (DEBUG)
{
System.Console.Out.WriteLine(((skip) ? " SKIP: " : "NOSKIP: ")
+ IBM.ICU.Impl.Utility.Escape(input) + " => "
+ IBM.ICU.Impl.Utility.Escape(output));
}
if (skip)
{
return(Int32.MinValue);
}
}
if (output.Equals(input))
{
return(0);
}
text.Replace(lastSafe, limit, output);
return(output.Length - len);
}
/// <summary>
/// UnicodeReplacer API
/// </summary>
///
public virtual int Replace(Replaceable text, int start, int limit, int[] cursor)
{
int outLen = 0;
// Copy segment with out-of-band data
int dest = limit;
// If there was no match, that means that a quantifier
// matched zero-length. E.g., x (a)* y matched "xy".
if (matchStart >= 0)
{
if (matchStart != matchLimit)
{
text.Copy(matchStart, matchLimit, dest);
outLen = matchLimit - matchStart;
}
}
text.Replace(start, limit, ""); // delete original text
return(outLen);
}
/// <summary>
/// Implements <see cref="M:IBM.ICU.Text.Transliterator.HandleTransliterate(IBM.ICU.Text.Replaceable, null, System.Boolean)"/>.
/// </summary>
///
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position offsets,
bool isIncremental)
{
int cursor = offsets.start;
int limit = offsets.limit;
StringBuilder str = new StringBuilder();
str.Append(OPEN_DELIM);
int len;
String name;
while (cursor < limit)
{
int c = text.Char32At(cursor);
if ((name = IBM.ICU.Lang.UCharacter.GetExtendedName(c)) != null)
{
str.Length = OPEN_DELIM_LEN;
str.Append(name).Append(CLOSE_DELIM);
int clen = IBM.ICU.Text.UTF16.GetCharCount(c);
text.Replace(cursor, cursor + clen, str.ToString());
len = str.Length;
cursor += len; // advance cursor by 1 and adjust for new text
limit += len - clen; // change in length
}
else
{
++cursor;
}
}
offsets.contextLimit += limit - offsets.limit;
offsets.limit = limit;
offsets.start = cursor;
}
/// <summary>
/// Implements <see cref="M:IBM.ICU.Text.Transliterator.HandleTransliterate(IBM.ICU.Text.Replaceable, null, System.Boolean)"/>.
/// </summary>
///
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position offsets,
bool isIncremental)
{
int maxLen = IBM.ICU.Impl.UCharacterName.GetInstance().GetMaxCharNameLength() + 1; // allow
// for
// temporary
// trailing
// space
StringBuilder name = new StringBuilder(maxLen);
// Get the legal character set
UnicodeSet legal = new UnicodeSet();
IBM.ICU.Impl.UCharacterName.GetInstance().GetCharNameCharacters(legal);
int cursor = offsets.start;
int limit = offsets.limit;
// Modes:
// 0 - looking for open delimiter
// 1 - after open delimiter
int mode = 0;
int openPos = -1; // open delim candidate pos
int c;
while (cursor < limit)
{
c = text.Char32At(cursor);
switch (mode)
{
case 0: // looking for open delimiter
if (c == OPEN_DELIM) // quick check first
{
openPos = cursor;
int i = IBM.ICU.Impl.Utility.ParsePattern(OPEN_PAT, text, cursor, limit);
if (i >= 0 && i < limit)
{
mode = 1;
name.Length = 0;
cursor = i;
continue; // *** reprocess char32At(cursor)
}
}
break;
case 1: // after open delimiter
// Look for legal chars. If \s+ is found, convert it
// to a single space. If closeDelimiter is found, exit
// the loop. If any other character is found, exit the
// loop. If the limit is reached, exit the loop.
// Convert \s+ => SPACE. This assumes there are no
// runs of >1 space characters in names.
if (IBM.ICU.Impl.UCharacterProperty.IsRuleWhiteSpace(c))
{
// Ignore leading whitespace
if (name.Length > 0 &&
name[name.Length - 1] != SPACE)
{
name.Append(SPACE);
// If we are too long then abort. maxLen includes
// temporary trailing space, so use '>'.
if (name.Length > maxLen)
{
mode = 0;
}
}
break;
}
if (c == CLOSE_DELIM)
{
int len = name.Length;
// Delete trailing space, if any
if (len > 0 && name[len - 1] == SPACE)
{
name.Length = --len;
}
c = IBM.ICU.Lang.UCharacter.GetCharFromExtendedName(name.ToString());
if (c != -1)
{
// Lookup succeeded
// assert(UTF16.getCharCount(CLOSE_DELIM) == 1);
cursor++; // advance over CLOSE_DELIM
String str = IBM.ICU.Text.UTF16.ValueOf(c);
text.Replace(openPos, cursor, str);
// Adjust indices for the change in the length of
// the string. Do not assume that str.length() ==
// 1, in case of surrogates.
int delta = cursor - openPos - str.Length;
cursor -= delta;
limit -= delta;
// assert(cursor == openPos + str.length());
}
// If the lookup failed, we leave things as-is and
// still switch to mode 0 and continue.
mode = 0;
openPos = -1; // close off candidate
continue; // *** reprocess char32At(cursor)
}
if (legal.Contains(c))
{
IBM.ICU.Text.UTF16.Append(name, c);
// If we go past the longest possible name then abort.
// maxLen includes temporary trailing space, so use '>='.
if (name.Length >= maxLen)
{
mode = 0;
}
}
// Invalid character
else
{
--cursor; // Backup and reprocess this character
mode = 0;
}
break;
}
cursor += IBM.ICU.Text.UTF16.GetCharCount(c);
}
offsets.contextLimit += limit - offsets.limit;
offsets.limit = limit;
// In incremental mode, only advance the cursor up to the last
// open delimiter candidate.
offsets.start = (isIncremental && openPos >= 0) ? openPos : cursor;
}
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position pos,
bool incremental)
{
boundaryCount = 0;
int boundary = 0;
GetBreakIterator(); // Lazy-create it if necessary
bi.SetText(new BreakTransliterator.ReplaceableCharacterIterator(text, pos.start, pos.limit,
pos.start));
// TODO: fix clumsy workaround used below.
/*
* char[] tempBuffer = new char[text.length()]; text.getChars(0,
* text.length(), tempBuffer, 0); bi.setText(new
* StringCharacterIterator(new String(tempBuffer), pos.start, pos.limit,
* pos.start));
*/
// end debugging
// To make things much easier, we will stack the boundaries, and then
// insert at the end.
// generally, we won't need too many, since we will be filtered.
for (boundary = bi.First(); boundary != IBM.ICU.Text.BreakIterator.DONE &&
boundary < pos.limit; boundary = bi.Next())
{
if (boundary == 0)
{
continue;
}
// HACK: Check to see that preceeding item was a letter
int cp = IBM.ICU.Text.UTF16.CharAt(text, boundary - 1);
int type = IBM.ICU.Lang.UCharacter.GetType(cp);
// System.out.println(Integer.toString(cp,16) + " (before): " +
// type);
if (((1 << type) & LETTER_OR_MARK_MASK) == 0)
{
continue;
}
cp = IBM.ICU.Text.UTF16.CharAt(text, boundary);
type = IBM.ICU.Lang.UCharacter.GetType(cp);
// System.out.println(Integer.toString(cp,16) + " (after): " +
// type);
if (((1 << type) & LETTER_OR_MARK_MASK) == 0)
{
continue;
}
if (boundaryCount >= boundaries.Length) // realloc if necessary
{
int[] temp = new int[boundaries.Length * 2];
System.Array.Copy((Array)(boundaries), 0, (Array)(temp), 0, boundaries.Length);
boundaries = temp;
}
boundaries[boundaryCount++] = boundary;
// System.out.println(boundary);
}
int delta = 0;
int lastBoundary = 0;
if (boundaryCount != 0) // if we found something, adjust
{
delta = boundaryCount * insertion.Length;
lastBoundary = boundaries[boundaryCount - 1];
// we do this from the end backwards, so that we don't have to keep
// updating.
while (boundaryCount > 0)
{
boundary = boundaries[--boundaryCount];
text.Replace(boundary, boundary, insertion);
}
}
// Now fix up the return values
pos.contextLimit += delta;
pos.limit += delta;
pos.start = (incremental) ? lastBoundary + delta : pos.limit;
}
// = public static UnicodeReplacer valueOf(String output,
// = int cursorPos,
// = RuleBasedTransliterator.Data data) {
// = if (output.length() == 1) {
// = char c = output.charAt(0);
// = UnicodeReplacer r = data.lookupReplacer(c);
// = if (r != null) {
// = return r;
// = }
// = }
// = return new StringReplacer(output, cursorPos, data);
// = }
/// <summary>
/// UnicodeReplacer API
/// </summary>
///
public virtual int Replace(Replaceable text, int start, int limit, int[] cursor)
{
int outLen;
int newStart = 0;
// NOTE: It should be possible to _always_ run the complex
// processing code; just slower. If not, then there is a bug
// in the complex processing code.
// Simple (no nested replacers) Processing Code :
if (!isComplex)
{
text.Replace(start, limit, output);
outLen = output.Length;
// Setup default cursor position (for cursorPos within output)
newStart = cursorPos;
}
// Complex (nested replacers) Processing Code :
else
{
/*
* When there are segments to be copied, use the Replaceable.copy()
* API in order to retain out-of-band data. Copy everything to the
* end of the string, then copy them back over the key. This
* preserves the integrity of indices into the key and surrounding
* context while generating the output text.
*/
StringBuilder buf = new StringBuilder();
int oOutput; // offset into 'output'
isComplex = false;
// The temporary buffer starts at tempStart, and :
// to destLimit + tempExtra. The start of the buffer has a single
// character from before the key. This provides style
// data when addition characters are filled into the
// temporary buffer. If there is nothing to the left, use
// the non-character U+FFFF, which Replaceable subclasses
// should treat specially as a "no-style character."
// destStart points to the point after the style context
// character, so it is tempStart+1 or tempStart+2.
int tempStart = text.Length(); // start of temp buffer
int destStart = tempStart; // copy new text to here
if (start > 0)
{
int len = IBM.ICU.Text.UTF16.GetCharCount(text.Char32At(start - 1));
text.Copy(start - len, start, tempStart);
destStart += len;
}
else
{
text.Replace(tempStart, tempStart, "\uFFFF");
destStart++;
}
int destLimit = destStart;
int tempExtra = 0; // temp chars after destLimit
for (oOutput = 0; oOutput < output.Length;)
{
if (oOutput == cursorPos)
{
// Record the position of the cursor
newStart = buf.Length + destLimit - destStart; // relative
// to start
// the buf.length() was inserted for bug 5789
// the problem is that if we are accumulating into a buffer
// (when r == null below)
// then the actual length of the text at that point needs to
// add the buf length.
// there was an alternative suggested in #5789, but that
// looks like it won't work
// if we have accumulated some stuff in the dest part AND
// have a non-zero buffer.
}
int c = IBM.ICU.Text.UTF16.CharAt(output, oOutput);
// When we are at the last position copy the right style
// context character into the temporary buffer. We don't
// do this before because it will provide an incorrect
// right context for previous replace() operations.
int nextIndex = oOutput + IBM.ICU.Text.UTF16.GetCharCount(c);
if (nextIndex == output.Length)
{
tempExtra = IBM.ICU.Text.UTF16.GetCharCount(text.Char32At(limit));
text.Copy(limit, limit + tempExtra, destLimit);
}
UnicodeReplacer r = data.LookupReplacer(c);
if (r == null)
{
// Accumulate straight (non-segment) text.
IBM.ICU.Text.UTF16.Append(buf, c);
}
else
{
isComplex = true;
// Insert any accumulated straight text.
if (buf.Length > 0)
{
text.Replace(destLimit, destLimit, buf.ToString());
destLimit += buf.Length;
buf.Length = 0;
}
// Delegate output generation to replacer object
int len_0 = r.Replace(text, destLimit, destLimit, cursor);
destLimit += len_0;
}
oOutput = nextIndex;
}
// Insert any accumulated straight text.
if (buf.Length > 0)
{
text.Replace(destLimit, destLimit, buf.ToString());
destLimit += buf.Length;
}
if (oOutput == cursorPos)
{
// Record the position of the cursor
newStart = destLimit - destStart; // relative to start
}
outLen = destLimit - destStart;
// Copy new text to start, and delete it
text.Copy(destStart, destLimit, start);
text.Replace(tempStart + outLen, destLimit + tempExtra + outLen, "");
// Delete the old text (the key)
text.Replace(start + outLen, limit + outLen, "");
}
if (hasCursor)
{
// Adjust the cursor for positions outside the key. These
// refer to code points rather than code units. If cursorPos
// is within the output string, then use newStart, which has
// already been set above.
if (cursorPos < 0)
{
newStart = start;
int n = cursorPos;
// Outside the output string, cursorPos counts code points
while (n < 0 && newStart > 0)
{
newStart -= IBM.ICU.Text.UTF16.GetCharCount(text.Char32At(newStart - 1));
++n;
}
newStart += n;
}
else if (cursorPos > output.Length)
{
newStart = start + outLen;
int n_1 = cursorPos - output.Length;
// Outside the output string, cursorPos counts code points
while (n_1 > 0 && newStart < text.Length())
{
newStart += IBM.ICU.Text.UTF16.GetCharCount(text.Char32At(newStart));
--n_1;
}
newStart += n_1;
}
else
{
// Cursor is within output string. It has been set up above
// to be relative to start.
newStart += start;
}
cursor[0] = newStart;
}
return(outLen);
}
/// <summary>
/// Implements <see cref="M:IBM.ICU.Text.Transliterator.HandleTransliterate(IBM.ICU.Text.Replaceable, null, System.Boolean)"/>.
/// </summary>
///
protected internal override void HandleTransliterate(Replaceable text, Transliterator.Position pos,
bool isIncremental)
{
int start = pos.start;
int limit = pos.limit;
int i, j, ipat;
loop : {
while (start < limit)
{
// Loop over the forms in spec[]. Exit this loop when we
// match one of the specs. Exit the outer loop if a
// partial match is detected and isIncremental is true.
for (j = 0, ipat = 0; spec[ipat] != END; ++j)
{
// Read the header
int prefixLen = spec[ipat++];
int suffixLen = spec[ipat++];
int radix = spec[ipat++];
int minDigits = spec[ipat++];
int maxDigits = spec[ipat++];
// s is a copy of start that is advanced over the
// characters as we parse them.
int s = start;
bool match = true;
for (i = 0; i < prefixLen; ++i)
{
if (s >= limit)
{
if (i > 0)
{
// We've already matched a character. This is
// a partial match, so we return if in
// incremental mode. In non-incremental mode,
// go to the next spec.
if (isIncremental)
{
goto gotoloop;
}
match = false;
break;
}
}
char c = text.CharAt(s++);
if (c != spec[ipat + i])
{
match = false;
break;
}
}
if (match)
{
int u = 0;
int digitCount = 0;
for (;;)
{
if (s >= limit)
{
// Check for partial match in incremental mode.
if (s > start && isIncremental)
{
goto gotoloop;
}
break;
}
int ch = text.Char32At(s);
int digit = IBM.ICU.Lang.UCharacter.Digit(ch, radix);
if (digit < 0)
{
break;
}
s += IBM.ICU.Text.UTF16.GetCharCount(ch);
u = (u * radix) + digit;
if (++digitCount == maxDigits)
{
break;
}
}
match = (digitCount >= minDigits);
if (match)
{
for (i = 0; i < suffixLen; ++i)
{
if (s >= limit)
{
// Check for partial match in incremental mode.
if (s > start && isIncremental)
{
goto gotoloop;
}
match = false;
break;
}
char c_0 = text.CharAt(s++);
if (c_0 != spec[ipat + prefixLen + i])
{
match = false;
break;
}
}
if (match)
{
// At this point, we have a match
String str = IBM.ICU.Text.UTF16.ValueOf(u);
text.Replace(start, s, str);
limit -= s - start - str.Length;
// The following break statement leaves the
// loop that is traversing the forms in
// spec[]. We then parse the next input
// character.
break;
}
}
}
ipat += prefixLen + suffixLen;
}
if (start < limit)
{
start += IBM.ICU.Text.UTF16.GetCharCount(text.Char32At(start));
}
}
}
gotoloop:
;
pos.contextLimit += limit - pos.limit;
pos.limit = limit;
pos.start = start;
}