@Override
protected void collectNavigationMarkers(
@NotNull PsiElement element, Collection<? super RelatedItemLineMarkerInfo> result) {
final PsiElement pythonStub = getPythonStub(element);
if (pythonStub != null) {
final List<GotoRelatedItem> relatedItems =
GotoRelatedItem.createItems(Collections.singletonList(pythonStub));
result.add(
new RelatedItemLineMarkerInfo<PsiElement>(
element,
element.getTextRange(),
ICON,
Pass.LINE_MARKERS,
element1 -> "Has stub item in " + pythonStub.getContainingFile().getName(),
new GutterIconNavigationHandler<PsiElement>() {
@Override
public void navigate(MouseEvent e, PsiElement elt) {
final PsiElement pythonStub = getPythonStub(elt);
if (pythonStub != null) {
PsiNavigateUtil.navigate(pythonStub);
}
}
},
GutterIconRenderer.Alignment.RIGHT,
relatedItems));
}
}
public class ExtensionPointDeclarationRelatedItemLineMarkerProvider
extends DevkitRelatedLineMarkerProviderBase {
private static final NotNullFunction<ExtensionPointCandidate, Collection<? extends PsiElement>>
CONVERTER = candidate -> Collections.singleton(candidate.pointer.getElement());
private static final NotNullFunction<
ExtensionPointCandidate, Collection<? extends GotoRelatedItem>>
RELATED_ITEM_PROVIDER =
candidate ->
GotoRelatedItem.createItems(
Collections.singleton(candidate.pointer.getElement()), "DevKit");
@Override
protected void collectNavigationMarkers(
@NotNull PsiElement element, Collection<? super RelatedItemLineMarkerInfo> result) {
if (element instanceof PsiField) {
process((PsiField) element, result);
}
}
private static void process(
PsiField psiField, Collection<? super RelatedItemLineMarkerInfo> result) {
if (!isExtensionPointNameDeclarationField(psiField)) return;
final PsiClass epClass = resolveExtensionPointClass(psiField);
if (epClass == null) return;
final String epName = resolveEpName(psiField);
if (epName == null) return;
ExtensionPointLocator locator = new ExtensionPointLocator(epClass);
List<ExtensionPointCandidate> targets =
ContainerUtil.filter(
locator.findDirectCandidates(),
new Condition<ExtensionPointCandidate>() {
@Override
public boolean value(ExtensionPointCandidate candidate) {
return epName.equals(candidate.epName);
}
});
final RelatedItemLineMarkerInfo<PsiElement> info =
NavigationGutterIconBuilder.create(AllIcons.Nodes.Plugin, CONVERTER, RELATED_ITEM_PROVIDER)
.setTargets(targets)
.setPopupTitle("Choose Extension Point")
.setTooltipText("Extension Point Declaration")
.setAlignment(GutterIconRenderer.Alignment.RIGHT)
.createLineMarkerInfo(psiField.getNameIdentifier());
result.add(info);
}
@Nullable
private static PsiClass resolveExtensionPointClass(PsiField psiField) {
final PsiType typeParameter =
PsiUtil.substituteTypeParameter(
psiField.getType(), ExtensionPointName.class.getName(), 0, false);
return PsiUtil.resolveClassInClassTypeOnly(typeParameter);
}
private static String resolveEpName(PsiField psiField) {
final PsiExpression initializer = psiField.getInitializer();
PsiExpressionList expressionList = null;
if (initializer instanceof PsiMethodCallExpression) {
expressionList = ((PsiMethodCallExpression) initializer).getArgumentList();
} else if (initializer instanceof PsiNewExpression) {
expressionList = ((PsiNewExpression) initializer).getArgumentList();
}
if (expressionList == null) return null;
final PsiExpression[] expressions = expressionList.getExpressions();
if (expressions.length != 1) return null;
final PsiExpression epNameExpression = expressions[0];
final PsiConstantEvaluationHelper helper =
JavaPsiFacade.getInstance(psiField.getProject()).getConstantEvaluationHelper();
final Object o = helper.computeConstantExpression(epNameExpression);
return o instanceof String ? (String) o : null;
}
private static boolean isExtensionPointNameDeclarationField(PsiField psiField) {
// *do* allow non-public
if (!psiField.hasModifierProperty(PsiModifier.FINAL)
|| !psiField.hasModifierProperty(PsiModifier.STATIC)
|| psiField.hasModifierProperty(PsiModifier.ABSTRACT)) {
return false;
}
if (!psiField.hasInitializer()) {
return false;
}
final PsiExpression initializer = psiField.getInitializer();
if (!(initializer instanceof PsiMethodCallExpression)
&& !(initializer instanceof PsiNewExpression)) {
return false;
}
final PsiClass fieldClass = PsiTypesUtil.getPsiClass(psiField.getType());
if (fieldClass == null) {
return false;
}
return ExtensionPointName.class.getName().equals(fieldClass.getQualifiedName());
}
}
