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org.jetbrains.kotlin.js.translate.reference.ReferenceTranslator Maven / Gradle / Ivy
/*
* Copyright 2010-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.js.translate.reference;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.descriptors.*;
import org.jetbrains.kotlin.js.backend.ast.JsExpression;
import org.jetbrains.kotlin.js.backend.ast.JsInvocation;
import org.jetbrains.kotlin.js.backend.ast.JsName;
import org.jetbrains.kotlin.js.backend.ast.JsNameRef;
import org.jetbrains.kotlin.js.backend.ast.metadata.MetadataProperties;
import org.jetbrains.kotlin.js.backend.ast.metadata.SideEffectKind;
import org.jetbrains.kotlin.js.translate.context.TranslationContext;
import org.jetbrains.kotlin.js.translate.utils.AnnotationsUtils;
import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
import org.jetbrains.kotlin.psi.KtExpression;
import org.jetbrains.kotlin.psi.KtQualifiedExpression;
import org.jetbrains.kotlin.psi.KtSimpleNameExpression;
import org.jetbrains.kotlin.resolve.DescriptorUtils;
import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getDescriptorForReferenceExpression;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.getSelectorAsSimpleName;
import static org.jetbrains.kotlin.psi.KtPsiUtil.isBackingFieldReference;
public final class ReferenceTranslator {
private ReferenceTranslator() {
}
@NotNull
public static JsExpression translateSimpleName(@NotNull KtSimpleNameExpression expression, @NotNull TranslationContext context) {
return getAccessTranslator(expression, context).translateAsGet();
}
@NotNull
public static JsExpression translateAsValueReference(@NotNull DeclarationDescriptor descriptor, @NotNull TranslationContext context) {
if (AnnotationsUtils.isNativeObject(descriptor) || AnnotationsUtils.isLibraryObject(descriptor)) {
return context.getInnerReference(descriptor);
}
JsExpression alias = context.getAliasForDescriptor(descriptor);
if (alias != null) return alias;
if (shouldTranslateAsFQN(descriptor, context)) {
return context.getQualifiedReference(descriptor);
}
if (descriptor instanceof PropertyDescriptor) {
PropertyDescriptor property = (PropertyDescriptor) descriptor;
if (context.isFromCurrentModule(property)) {
return context.getInnerReference(property);
}
else {
JsExpression qualifier = context.getInnerReference(property.getContainingDeclaration());
JsName name = context.getNameForDescriptor(property);
return new JsNameRef(name, qualifier);
}
}
if (DescriptorUtils.isObject(descriptor) || DescriptorUtils.isEnumEntry(descriptor)) {
if (!context.isFromCurrentModule(descriptor)) {
return getLazyReferenceToObject((ClassDescriptor) descriptor, context);
}
else {
JsExpression functionRef = JsAstUtils.pureFqn(context.getNameForObjectInstance((ClassDescriptor) descriptor), null);
return new JsInvocation(functionRef);
}
}
return context.getInnerReference(descriptor);
}
@NotNull
public static JsExpression translateAsTypeReference(@NotNull ClassDescriptor descriptor, @NotNull TranslationContext context) {
if (AnnotationsUtils.isNativeObject(descriptor) || AnnotationsUtils.isLibraryObject(descriptor)) {
return context.getInnerReference(descriptor);
}
if (!shouldTranslateAsFQN(descriptor, context)) {
if (DescriptorUtils.isObject(descriptor) || DescriptorUtils.isEnumEntry(descriptor)) {
if (!context.isFromCurrentModule(descriptor)) {
return getPrototypeIfNecessary(descriptor, getLazyReferenceToObject(descriptor, context));
}
}
return context.getInnerReference(descriptor);
}
return getPrototypeIfNecessary(descriptor, context.getQualifiedReference(descriptor));
}
@NotNull
private static JsExpression getPrototypeIfNecessary(@NotNull ClassDescriptor descriptor, @NotNull JsExpression reference) {
if (DescriptorUtils.isObject(descriptor) || DescriptorUtils.isEnumEntry(descriptor)) {
JsNameRef getPrototypeRef = JsAstUtils.pureFqn("getPrototypeOf", JsAstUtils.pureFqn("Object", null));
JsInvocation getPrototypeInvocation = new JsInvocation(getPrototypeRef, reference);
MetadataProperties.setSideEffects(getPrototypeInvocation, SideEffectKind.PURE);
reference = JsAstUtils.pureFqn("constructor", getPrototypeInvocation);
}
return reference;
}
@NotNull
private static JsExpression getLazyReferenceToObject(@NotNull ClassDescriptor descriptor, @NotNull TranslationContext context) {
DeclarationDescriptor container = descriptor.getContainingDeclaration();
JsExpression qualifier = context.getInnerReference(container);
return new JsNameRef(context.getNameForDescriptor(descriptor), qualifier);
}
private static boolean shouldTranslateAsFQN(@NotNull DeclarationDescriptor descriptor, @NotNull TranslationContext context) {
return isLocalVarOrFunction(descriptor) || context.isPublicInlineFunction();
}
private static boolean isLocalVarOrFunction(DeclarationDescriptor descriptor) {
return descriptor.getContainingDeclaration() instanceof FunctionDescriptor && !(descriptor instanceof ClassDescriptor);
}
@NotNull
public static AccessTranslator getAccessTranslator(@NotNull KtSimpleNameExpression referenceExpression,
@NotNull TranslationContext context) {
if (isBackingFieldReference(getDescriptorForReferenceExpression(context.bindingContext(), referenceExpression))) {
return BackingFieldAccessTranslator.newInstance(referenceExpression, context);
}
if (canBePropertyAccess(referenceExpression, context)) {
return VariableAccessTranslator.newInstance(context, referenceExpression, null);
}
if (CompanionObjectIntrinsicAccessTranslator.isCompanionObjectReference(referenceExpression, context)) {
return CompanionObjectIntrinsicAccessTranslator.newInstance(referenceExpression, context);
}
return ReferenceAccessTranslator.newInstance(referenceExpression, context);
}
public static boolean canBePropertyAccess(@NotNull KtExpression expression, @NotNull TranslationContext context) {
KtSimpleNameExpression simpleNameExpression = null;
if (expression instanceof KtQualifiedExpression) {
simpleNameExpression = getSelectorAsSimpleName((KtQualifiedExpression) expression);
}
else if (expression instanceof KtSimpleNameExpression) {
simpleNameExpression = (KtSimpleNameExpression) expression;
}
if (simpleNameExpression == null) return false;
DeclarationDescriptor descriptor = getDescriptorForReferenceExpression(context.bindingContext(), simpleNameExpression);
// Skip ValueParameterDescriptor because sometime we can miss resolved call for it, e.g. when set something to delegated property.
return descriptor instanceof VariableDescriptor && !(descriptor instanceof ValueParameterDescriptor);
}
}