@Nullable
public static <E extends PsiElement> E findArgumentList(
PsiFile file,
int offset,
int lbraceOffset,
@NotNull ParameterInfoHandlerWithTabActionSupport findArgumentListHelper) {
if (file == null) return null;
CharSequence chars = file.getViewProvider().getContents();
if (offset >= chars.length()) offset = chars.length() - 1;
int offset1 = CharArrayUtil.shiftBackward(chars, offset, " \t\n\r");
if (offset1 < 0) return null;
boolean acceptRparenth = true;
boolean acceptLparenth = false;
if (offset1 != offset) {
offset = offset1;
acceptRparenth = false;
acceptLparenth = true;
}
PsiElement element = file.findElementAt(offset);
if (element == null) return null;
PsiElement parent = element.getParent();
while (true) {
if (findArgumentListHelper.getArgumentListClass().isInstance(parent)) {
TextRange range = parent.getTextRange();
if (!acceptRparenth) {
if (offset == range.getEndOffset() - 1) {
PsiElement[] children = parent.getChildren();
if (children.length == 0) return null;
PsiElement last = children[children.length - 1];
if (last.getNode().getElementType()
== findArgumentListHelper.getActualParametersRBraceType()) {
parent = parent.getParent();
continue;
}
}
}
if (!acceptLparenth) {
if (offset == range.getStartOffset()) {
parent = parent.getParent();
continue;
}
}
if (lbraceOffset >= 0 && range.getStartOffset() != lbraceOffset) {
parent = parent.getParent();
continue;
}
break;
}
if (parent instanceof PsiFile || parent == null) return null;
final Set<? extends Class> set = findArgumentListHelper.getArgListStopSearchClasses();
for (Class aClass : set) {
if (aClass.isInstance(parent)) return null;
}
parent = parent.getParent();
}
PsiElement listParent = parent.getParent();
for (Class c : (Set<Class>) findArgumentListHelper.getArgumentListAllowedParentClasses()) {
if (c.isInstance(listParent)) return (E) parent;
}
return null;
}
