private String getCaseCorrectedLookupString(LookupElement item) {
String lookupString = item.getLookupString();
if (item.isCaseSensitive()) {
return lookupString;
}
final String prefix = itemPattern(item);
final int length = prefix.length();
if (length == 0 || !itemMatcher(item).prefixMatches(prefix)) return lookupString;
boolean isAllLower = true;
boolean isAllUpper = true;
boolean sameCase = true;
for (int i = 0; i < length && (isAllLower || isAllUpper || sameCase); i++) {
final char c = prefix.charAt(i);
boolean isLower = Character.isLowerCase(c);
boolean isUpper = Character.isUpperCase(c);
// do not take this kind of symbols into account ('_', '@', etc.)
if (!isLower && !isUpper) continue;
isAllLower = isAllLower && isLower;
isAllUpper = isAllUpper && isUpper;
sameCase = sameCase && isLower == Character.isLowerCase(lookupString.charAt(i));
}
if (sameCase) return lookupString;
if (isAllLower) return lookupString.toLowerCase();
if (isAllUpper) return StringUtil.toUpperCase(lookupString);
return lookupString;
}
@Override
public boolean isStartMatch(LookupElement element) {
if (super.isStartMatch(element)) {
return true;
}
if (element.isCaseSensitive()) {
return false;
}
return ContainerUtil.or(
element.getAllLookupStrings(),
new Condition<String>() {
@Override
public boolean value(String s) {
return myCaseInsensitiveMatcher.isStartMatch(s);
}
});
}
@Override
public boolean prefixMatches(@NotNull final LookupElement element) {
return prefixMatchersInternal(element, !element.isCaseSensitive());
}