/** Search known properties for the best 'match' to show as hover data. */
private PropertyInfo findBestHoverMatch(String propName) {
debug(">> findBestHoverMatch(" + propName + ")");
debug("index size: " + getIndex().size());
// TODO: optimize, should be able to use index's treemap to find this without iterating all
// entries.
PropertyInfo best = null;
int bestCommonPrefixLen = 0; // We try to pick property with longest common prefix
int bestExtraLen = Integer.MAX_VALUE;
for (PropertyInfo candidate : getIndex()) {
int commonPrefixLen = StringUtil.commonPrefixLength(propName, candidate.getId());
int extraLen = candidate.getId().length() - commonPrefixLen;
if (commonPrefixLen == propName.length() && extraLen == 0) {
// exact match found, can stop searching for better matches
return candidate;
}
// candidate is better if...
if (commonPrefixLen > bestCommonPrefixLen // it has a longer common prefix
|| commonPrefixLen == bestCommonPrefixLen
&& extraLen < bestExtraLen // or same common prefix but fewer extra chars
) {
bestCommonPrefixLen = commonPrefixLen;
bestExtraLen = extraLen;
best = candidate;
}
}
debug("<< findBestHoverMatch(" + propName + "): " + best);
return best;
}
private void highlightPattern(String pattern, String data, StyledString result) {
Styler highlightStyle = isDeemphasized() ? GREY_UNDERLINE : UNDERLINE;
Styler plainStyle = isDeemphasized() ? GREY : NULL_STYLER;
if (StringUtil.hasText(pattern)) {
int dataPos = 0;
int dataLen = data.length();
int patternPos = 0;
int patternLen = pattern.length();
while (dataPos < dataLen && patternPos < patternLen) {
int pChar = pattern.charAt(patternPos++);
int highlightPos = data.indexOf(pChar, dataPos);
if (dataPos < highlightPos) {
result.append(data.substring(dataPos, highlightPos), plainStyle);
}
result.append(data.charAt(highlightPos), highlightStyle);
dataPos = highlightPos + 1;
}
if (dataPos < dataLen) {
result.append(data.substring(dataPos), plainStyle);
}
} else { // no pattern to highlight
result.append(data, plainStyle);
}
}
/** Create completions proposals for a field editor where property names can be entered. */
public IContentProposal[] getPropertyFieldProposals(String contents, int position) {
String prefix = contents.substring(0, position);
if (StringUtil.hasText(prefix)) {
List<Match<PropertyInfo>> matches = findMatches(prefix);
if (matches != null && !matches.isEmpty()) {
IContentProposal[] proposals = new IContentProposal[matches.size()];
Collections.sort(
matches,
new Comparator<Match<PropertyInfo>>() {
@Override
public int compare(Match<PropertyInfo> o1, Match<PropertyInfo> o2) {
int scoreCompare = Double.compare(o2.score, o1.score);
if (scoreCompare != 0) {
return scoreCompare;
} else {
return o1.data.getId().compareTo(o2.data.getId());
}
}
});
int i = 0;
for (Match<PropertyInfo> m : matches) {
proposals[i++] = new ContentProposal(m.data.getId(), m.data.getDescription());
}
return proposals;
}
}
return NO_CONTENT_PROPOSALS;
}
