private static Collection<String> suggestKeywords(PsiElement position) {
TextRange posRange = position.getTextRange();
BnfFile posFile = (BnfFile) position.getContainingFile();
BnfRule statement = PsiTreeUtil.getTopmostParentOfType(position, BnfRule.class);
final TextRange range;
if (statement != null) {
range = new TextRange(statement.getTextRange().getStartOffset(), posRange.getStartOffset());
} else {
int offset = posRange.getStartOffset();
for (PsiElement cur = GrammarUtil.getDummyAwarePrevSibling(position);
cur != null;
cur = GrammarUtil.getDummyAwarePrevSibling(cur)) {
if (cur instanceof BnfAttrs) offset = cur.getTextRange().getEndOffset();
else if (cur instanceof BnfRule) offset = cur.getTextRange().getStartOffset();
else continue;
break;
}
range = new TextRange(offset, posRange.getStartOffset());
}
final String text =
range.isEmpty()
? CompletionInitializationContext.DUMMY_IDENTIFIER
: range.substring(posFile.getText());
PsiFile file =
PsiFileFactory.getInstance(posFile.getProject())
.createFileFromText("a.bnf", BnfLanguage.INSTANCE, text, true, false);
int completionOffset = posRange.getStartOffset() - range.getStartOffset();
GeneratedParserUtilBase.CompletionState state =
new GeneratedParserUtilBase.CompletionState(completionOffset) {
@Override
public String convertItem(Object o) {
// we do not have other keywords
return o instanceof String ? (String) o : null;
}
};
file.putUserData(GeneratedParserUtilBase.COMPLETION_STATE_KEY, state);
TreeUtil.ensureParsed(file.getNode());
return state.items;
}
@Override
public void inlineElement(Project project, Editor editor, PsiElement psiElement) {
BnfRule rule = (BnfRule) psiElement;
BnfAttrs attrs = rule.getAttrs();
if (PsiTreeUtil.hasErrorElements(rule)) {
CommonRefactoringUtil.showErrorHint(project, editor, "Rule has errors", "Inline Rule", null);
return;
}
if (attrs != null && !attrs.getAttrList().isEmpty()) {
CommonRefactoringUtil.showErrorHint(
project, editor, "Rule has attributes", "Inline Rule", null);
return;
}
Collection<PsiReference> allReferences = ReferencesSearch.search(psiElement).findAll();
if (allReferences.isEmpty()) {
CommonRefactoringUtil.showErrorHint(
project, editor, "Rule is never used", "Inline Rule", null);
return;
}
boolean hasNonAttributeRefs = false;
for (PsiReference ref : allReferences) {
if (!GrammarUtil.isInAttributesReference(ref.getElement())) {
hasNonAttributeRefs = true;
break;
}
}
if (!hasNonAttributeRefs) {
CommonRefactoringUtil.showErrorHint(
project, editor, "Rule is referenced only in attributes", "Inline Rule", null);
return;
}
if (!CommonRefactoringUtil.checkReadOnlyStatus(project, rule)) return;
PsiReference reference =
editor != null
? TargetElementUtilBase.findReference(editor, editor.getCaretModel().getOffset())
: null;
if (reference != null && !rule.equals(reference.resolve())) {
reference = null;
}
InlineRuleDialog dialog = new InlineRuleDialog(project, rule, reference);
dialog.show();
}