private TooltipData generateTooltipData(FormulaFunction function, int currentArgIndex) {
TooltipData td = new TooltipData();
StringBuilder sb = new StringBuilder();
sb.append(function.getName() + "(");
int nbArgs = function.getArgumentNames().size();
int from = 0, to = 0;
for (int i = 0; i < nbArgs; i++) {
if (i == currentArgIndex) {
from = sb.length();
}
sb.append("<");
sb.append(function.getArgumentTypes().get(i).getSimpleName());
sb.append(">");
sb.append(function.getArgumentNames().get(i));
if (i == currentArgIndex) {
to = sb.length();
}
if (i < nbArgs - 1) sb.append(", ");
}
if (function.isVarArgs()) {
if (currentArgIndex >= nbArgs) {
from = sb.length();
to = from + 4;
}
sb.append(",...");
}
sb.append(")");
td.styles = new ProposalStyle[1];
td.styles[0] = ProposalStyle.getDefault(from, to);
td.value = sb.toString();
return td;
}
public FormulaFunctionProvider() {
functions = new TreeMap<String, List<FormulaFunction>>();
for (String setName : FormulaRegistry.getDefault().listFunctionSets()) {
FormulaFunctionSet set = FormulaRegistry.getDefault().findFunctionSet(setName);
for (FormulaFunction function : set.getFunctions()) {
List<FormulaFunction> functionList = functions.get(function.getName());
if (functionList == null) {
functionList = new ArrayList<FormulaFunction>();
functions.put(function.getName(), functionList);
}
functionList.add(function);
}
}
}
private String generateSignature(FormulaFunction function) {
StringBuffer sb = new StringBuffer();
if (function.getReturnType() != null) {
sb.append("<");
sb.append(function.getReturnType().getSimpleName());
sb.append("> ");
}
sb.append(function.getName() + "(");
int nbArgs = function.getArgumentNames().size();
for (int i = 0; i < nbArgs; i++) {
sb.append("<");
sb.append(function.getArgumentTypes().get(i).getSimpleName());
sb.append(">");
sb.append(function.getArgumentNames().get(i));
if (i < nbArgs - 1) sb.append(", ");
}
if (function.isVarArgs()) sb.append(",...");
sb.append(")");
return sb.toString();
}
@Override
public AutoCompleteResult listResult(final ContentDescriptor desc, final int limit) {
AutoCompleteResult result = new AutoCompleteResult();
FunctionDescriptor functionDesc = null;
if (desc instanceof FunctionDescriptor) {
functionDesc = (FunctionDescriptor) desc;
} else {
return result; // empty result
}
String nameToFind = functionDesc.getFunctionName();
// handle proposals
int count = 0;
// insertionPos is not yet provided for formula
// TODO: improve parser
String originalContent = desc.getOriginalContent();
int insertionPos = originalContent.lastIndexOf(nameToFind);
if (!functionDesc.hasOpenBracket()) {
Proposal topProposal = null;
String closestMatchingFunction = null;
for (String functionName : functions.keySet()) {
if (functionName.startsWith(nameToFind)) {
Proposal proposal = new Proposal(functionName + "(", false);
String description = functions.get(functionName).get(0).getDescription() + "\n\n";
for (FormulaFunction ff : functions.get(functionName))
description += generateSignature(ff);
proposal.setDescription(description);
for (FormulaFunction ff : functions.get(functionName))
proposal.addTooltipData(generateTooltipData(ff, 0));
proposal.addStyle(ProposalStyle.getDefault(0, nameToFind.length() - 1));
proposal.setInsertionPos(insertionPos);
proposal.setFunction(true); // display function icon
result.addProposal(proposal);
count++;
if (closestMatchingFunction == null
|| closestMatchingFunction.compareTo(functionName) > 0) {
closestMatchingFunction = functionName;
topProposal = proposal;
}
}
}
// handle top proposals
if (closestMatchingFunction != null) result.addTopProposal(topProposal);
}
result.setCount(count);
// handle tooltip
if (functionDesc.hasOpenBracket() && !functionDesc.isComplete()) {
for (String setName : FormulaRegistry.getDefault().listFunctionSets()) {
FormulaFunctionSet set = FormulaRegistry.getDefault().findFunctionSet(setName);
for (FormulaFunction function : set.findFunctions(nameToFind)) {
if (function.getName().equals(nameToFind))
if (function.getArgumentNames().size() >= functionDesc.getArgs().size()
|| function.isVarArgs())
result.addTooltipData(
generateTooltipData(function, functionDesc.getCurrentArgIndex()));
}
}
}
return result;
}