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ICU-1837 use style context during replace

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X-SVN-Rev: 10251
This commit is contained in:
Alan Liu 2002-11-14 01:46:11 +00:00
parent eddd59f368
commit bcdc20bce8
1 changed files with 24 additions and 3 deletions
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27
icu4c/source/i18n/strrepl.cpp
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@ -124,11 +124,32 @@ int32_t StringReplacer::replace(Replaceable& text,
* the integrity of indices into the key and surrounding context while
* generating the output text.
*/
int32_t destStart = text.length(); // copy new text to here
int32_t destLimit = destStart;
UnicodeString buf;
int32_t oOutput; // offset into 'output'
isComplex = FALSE;
// The temporary buffer starts at tempStart, and extends
// to destLimit. 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.
int32_t tempStart = text.length(); // start of temp buffer
int32_t destStart = tempStart; // copy new text to here
if (start > 0) {
int32_t len = UTF_CHAR_LENGTH(text.char32At(start-1));
text.copy(start-len, start, tempStart);
destStart += len;
} else {
UnicodeString str((UChar) 0xFFFF);
text.handleReplaceBetween(tempStart, tempStart, str);
destStart++;
}
int32_t destLimit = destStart;
for (oOutput=0; oOutput<output.length(); ) {
if (oOutput == cursorPos) {
// Record the position of the cursor
@ -169,7 +190,7 @@ int32_t StringReplacer::replace(Replaceable& text,
// Copy new text to start, and delete it
text.copy(destStart, destLimit, start);
text.handleReplaceBetween(destStart + outLen, destLimit + outLen, EMPTY);
text.handleReplaceBetween(tempStart + outLen, destLimit + outLen, EMPTY);
// Delete the old text (the key)
text.handleReplaceBetween(start + outLen, limit + outLen, EMPTY);