@Nullable
private static XmlTag getAnchor(
@NotNull XmlTag contextTag, Editor editor, XmlElementDescriptor selected) {
XmlContentDFA contentDFA = XmlContentDFA.getContentDFA(contextTag);
int offset = editor.getCaretModel().getOffset();
if (contentDFA == null) {
return null;
}
XmlTag anchor = null;
boolean previousPositionIsPossible = true;
for (XmlTag subTag : contextTag.getSubTags()) {
if (contentDFA.getPossibleElements().contains(selected)) {
if (subTag.getTextOffset() > offset) {
break;
}
anchor = subTag;
previousPositionIsPossible = true;
} else {
previousPositionIsPossible = false;
}
contentDFA.transition(subTag);
}
return previousPositionIsPossible ? null : anchor;
}
