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ICU-1837 use right style context as well

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X-SVN-Rev: 10304
This commit is contained in:
Alan Liu 2002-11-20 22:40:38 +00:00
parent 5035c9f797
commit f1438bfc00
1 changed files with 15 additions and 3 deletions
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18
icu4j/src/com/ibm/icu/text/StringReplacer.java
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@ -141,7 +141,7 @@ class StringReplacer implements UnicodeReplacer {
isComplex = false;
// The temporary buffer starts at tempStart, and extends
// to destLimit. The start of the buffer has a single
// 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
@ -160,6 +160,7 @@ class StringReplacer implements UnicodeReplacer {
destStart++;
}
int destLimit = destStart;
int tempExtra = 0; // temp chars after destLimit
for (oOutput=0; oOutput<output.length(); ) {
if (oOutput == cursorPos) {
@ -167,6 +168,17 @@ class StringReplacer implements UnicodeReplacer {
newStart = destLimit - destStart; // relative to start
}
int c = 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 + UTF16.getCharCount(c);
if (nextIndex == output.length()) {
tempExtra = UTF16.getCharCount(text.char32At(limit));
text.copy(limit, limit+tempExtra, destLimit);
}
UnicodeReplacer r = data.lookupReplacer(c);
if (r == null) {
// Accumulate straight (non-segment) text.
@ -185,7 +197,7 @@ class StringReplacer implements UnicodeReplacer {
int len = r.replace(text, destLimit, destLimit, cursor);
destLimit += len;
}
oOutput += UTF16.getCharCount(c);
oOutput = nextIndex;
}
// Insert any accumulated straight text.
if (buf.length() > 0) {
@ -201,7 +213,7 @@ class StringReplacer implements UnicodeReplacer {
// Copy new text to start, and delete it
text.copy(destStart, destLimit, start);
text.replace(tempStart + outLen, destLimit + outLen, "");
text.replace(tempStart + outLen, destLimit + tempExtra + outLen, "");
// Delete the old text (the key)
text.replace(start + outLen, limit + outLen, "");