private int getPrevOrNextParameterOffset(boolean isNext) {
if (!(myHandler instanceof ParameterInfoHandlerWithTabActionSupport)) return -1;
ParameterInfoHandlerWithTabActionSupport handler =
(ParameterInfoHandlerWithTabActionSupport) myHandler;
boolean noDelimiter = handler.getActualParameterDelimiterType() == TokenType.WHITE_SPACE;
int caretOffset = myEditor.getCaretModel().getOffset();
int offset =
noDelimiter
? caretOffset
: CharArrayUtil.shiftBackward(
myEditor.getDocument().getCharsSequence(), caretOffset - 1, " \t")
+ 1;
int lbraceOffset = myLbraceMarker.getStartOffset();
PsiFile file = PsiDocumentManager.getInstance(myProject).getPsiFile(myEditor.getDocument());
PsiElement argList =
lbraceOffset < offset ? findArgumentList(file, offset, lbraceOffset) : null;
if (argList == null) return -1;
@SuppressWarnings("unchecked")
PsiElement[] parameters = handler.getActualParameters(argList);
int currentParameterIndex =
noDelimiter
? JBIterable.of(parameters).indexOf((o) -> o.getTextRange().containsOffset(offset))
: ParameterInfoUtils.getCurrentParameterIndex(
argList.getNode(), offset, handler.getActualParameterDelimiterType());
int prevOrNextParameterIndex =
isNext && currentParameterIndex < parameters.length - 1
? currentParameterIndex + 1
: !isNext && currentParameterIndex > 0 ? currentParameterIndex - 1 : -1;
return prevOrNextParameterIndex != -1
? parameters[prevOrNextParameterIndex].getTextRange().getStartOffset()
: -1;
}
@NotNull
private static JBIterable<PsiElement> getSiblings(PsiElement element, boolean fwd) {
SyntaxTraverser.ApiEx<PsiElement> api =
fwd ? SyntaxTraverser.psiApi() : SyntaxTraverser.psiApiReversed();
JBIterable<PsiElement> flatSiblings = JBIterable.generate(element, api::next).skip(1);
return SyntaxTraverser.syntaxTraverser(api)
.withRoots(flatSiblings)
.expandAndSkip(e -> api.typeOf(e) == GeneratedParserUtilBase.DUMMY_BLOCK)
.traverse();
}