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org.jetbrains.kotlin.js.translate.utils.TranslationUtils Maven / Gradle / Ivy
/*
* Copyright 2010-2015 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.utils;
import com.google.dart.compiler.backend.js.ast.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.builtins.KotlinBuiltIns;
import org.jetbrains.kotlin.descriptors.*;
import org.jetbrains.kotlin.descriptors.impl.AnonymousFunctionDescriptor;
import org.jetbrains.kotlin.js.translate.context.TemporaryConstVariable;
import org.jetbrains.kotlin.js.translate.context.TranslationContext;
import org.jetbrains.kotlin.js.translate.general.Translation;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.DescriptorUtils;
import org.jetbrains.kotlin.types.KotlinType;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static com.google.dart.compiler.backend.js.ast.JsBinaryOperator.*;
import static org.jetbrains.kotlin.js.translate.context.Namer.getKotlinBackingFieldName;
import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getCallableDescriptorForOperationExpression;
import static org.jetbrains.kotlin.js.translate.utils.JsAstUtils.assignment;
import static org.jetbrains.kotlin.js.translate.utils.JsAstUtils.createDataDescriptor;
import static org.jetbrains.kotlin.js.translate.utils.ManglingUtils.getMangledName;
import static org.jetbrains.kotlin.resolve.DescriptorUtils.isAnonymousObject;
public final class TranslationUtils {
private TranslationUtils() {
}
@NotNull
public static JsPropertyInitializer translateFunctionAsEcma5PropertyDescriptor(@NotNull JsFunction function,
@NotNull FunctionDescriptor descriptor,
@NotNull TranslationContext context) {
if (DescriptorUtils.isExtension(descriptor)) {
return translateExtensionFunctionAsEcma5DataDescriptor(function, descriptor, context);
}
else {
JsStringLiteral getOrSet = context.program().getStringLiteral(descriptor instanceof PropertyGetterDescriptor ? "get" : "set");
return new JsPropertyInitializer(getOrSet, function);
}
}
@NotNull
public static JsFunction simpleReturnFunction(@NotNull JsScope functionScope, @NotNull JsExpression returnExpression) {
return new JsFunction(functionScope, new JsBlock(new JsReturn(returnExpression)), "");
}
@NotNull
private static JsPropertyInitializer translateExtensionFunctionAsEcma5DataDescriptor(@NotNull JsFunction function,
@NotNull FunctionDescriptor descriptor, @NotNull TranslationContext context) {
JsObjectLiteral meta = createDataDescriptor(function, ModalityKt.isOverridable(descriptor), false);
return new JsPropertyInitializer(context.getNameForDescriptor(descriptor).makeRef(), meta);
}
@NotNull
public static JsExpression translateExclForBinaryEqualLikeExpr(@NotNull JsBinaryOperation baseBinaryExpression) {
return new JsBinaryOperation(notOperator(baseBinaryExpression.getOperator()), baseBinaryExpression.getArg1(), baseBinaryExpression.getArg2());
}
public static boolean isEqualLikeOperator(@NotNull JsBinaryOperator operator) {
return notOperator(operator) != null;
}
@Nullable
private static JsBinaryOperator notOperator(@NotNull JsBinaryOperator operator) {
switch (operator) {
case REF_EQ:
return REF_NEQ;
case REF_NEQ:
return REF_EQ;
case EQ:
return NEQ;
case NEQ:
return EQ;
default:
return null;
}
}
@NotNull
public static JsBinaryOperation isNullCheck(@NotNull JsExpression expressionToCheck) {
return nullCheck(expressionToCheck, false);
}
@NotNull
public static JsBinaryOperation isNotNullCheck(@NotNull JsExpression expressionToCheck) {
return nullCheck(expressionToCheck, true);
}
@NotNull
public static JsBinaryOperation nullCheck(@NotNull JsExpression expressionToCheck, boolean isNegated) {
JsBinaryOperator operator = isNegated ? JsBinaryOperator.NEQ : JsBinaryOperator.EQ;
return new JsBinaryOperation(operator, expressionToCheck, JsLiteral.NULL);
}
@NotNull
public static JsConditional notNullConditional(
@NotNull JsExpression expression,
@NotNull JsExpression elseExpression,
@NotNull TranslationContext context
) {
JsExpression testExpression;
JsExpression thenExpression;
if (isCacheNeeded(expression)) {
TemporaryConstVariable tempVar = context.getOrDeclareTemporaryConstVariable(expression);
testExpression = isNotNullCheck(tempVar.value());
thenExpression = tempVar.value();
}
else {
testExpression = isNotNullCheck(expression);
thenExpression = expression;
}
return new JsConditional(testExpression, thenExpression, elseExpression);
}
@NotNull
public static JsNameRef backingFieldReference(@NotNull TranslationContext context,
@NotNull PropertyDescriptor descriptor) {
JsName backingFieldName = context.getNameForDescriptor(descriptor);
if(!JsDescriptorUtils.isSimpleFinalProperty(descriptor)) {
String backingFieldMangledName;
if (!Visibilities.isPrivate(descriptor.getVisibility())) {
backingFieldMangledName = getMangledName(descriptor, getKotlinBackingFieldName(backingFieldName.getIdent()));
} else {
backingFieldMangledName = getKotlinBackingFieldName(backingFieldName.getIdent());
}
backingFieldName = context.declarePropertyOrPropertyAccessorName(descriptor, backingFieldMangledName, false);
}
DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
JsExpression receiver;
if (containingDescriptor instanceof PackageFragmentDescriptor) {
// used inside package initializer
receiver = JsLiteral.THIS;
}
else {
receiver = context.getDispatchReceiver(JsDescriptorUtils.getReceiverParameterForDeclaration(containingDescriptor));
}
return new JsNameRef(backingFieldName, receiver);
}
@NotNull
public static JsExpression assignmentToBackingField(@NotNull TranslationContext context,
@NotNull PropertyDescriptor descriptor,
@NotNull JsExpression assignTo) {
JsNameRef backingFieldReference = backingFieldReference(context, descriptor);
return assignment(backingFieldReference, assignTo);
}
@Nullable
public static JsExpression translateInitializerForProperty(@NotNull KtProperty declaration,
@NotNull TranslationContext context) {
JsExpression jsInitExpression = null;
KtExpression initializer = declaration.getInitializer();
if (initializer != null) {
jsInitExpression = Translation.translateAsExpression(initializer, context);
}
return jsInitExpression;
}
@NotNull
public static JsExpression translateBaseExpression(@NotNull TranslationContext context,
@NotNull KtUnaryExpression expression) {
KtExpression baseExpression = PsiUtils.getBaseExpression(expression);
return Translation.translateAsExpression(baseExpression, context);
}
@NotNull
public static JsExpression translateLeftExpression(@NotNull TranslationContext context,
@NotNull KtBinaryExpression expression) {
return translateLeftExpression(context, expression, context.dynamicContext().jsBlock());
}
@NotNull
public static JsExpression translateLeftExpression(
@NotNull TranslationContext context,
@NotNull KtBinaryExpression expression,
@NotNull JsBlock block
) {
KtExpression left = expression.getLeft();
assert left != null : "Binary expression should have a left expression: " + expression.getText();
return Translation.translateAsExpression(left, context, block);
}
@NotNull
public static JsExpression translateRightExpression(@NotNull TranslationContext context,
@NotNull KtBinaryExpression expression) {
return translateRightExpression(context, expression, context.dynamicContext().jsBlock());
}
@NotNull
public static JsExpression translateRightExpression(
@NotNull TranslationContext context,
@NotNull KtBinaryExpression expression,
@NotNull JsBlock block) {
KtExpression rightExpression = expression.getRight();
assert rightExpression != null : "Binary expression should have a right expression";
return Translation.translateAsExpression(rightExpression, context, block);
}
public static boolean hasCorrespondingFunctionIntrinsic(@NotNull TranslationContext context,
@NotNull KtOperationExpression expression) {
CallableDescriptor operationDescriptor = getCallableDescriptorForOperationExpression(context.bindingContext(), expression);
if (operationDescriptor == null || !(operationDescriptor instanceof FunctionDescriptor)) return true;
KotlinType returnType = operationDescriptor.getReturnType();
if (returnType != null && (KotlinBuiltIns.isChar(returnType) || KotlinBuiltIns.isLong(returnType))) return false;
if (context.intrinsics().getFunctionIntrinsic((FunctionDescriptor) operationDescriptor).exists()) return true;
return false;
}
@NotNull
public static List generateInvocationArguments(@NotNull JsExpression receiver, @NotNull List arguments) {
if (arguments.isEmpty()) {
return Collections.singletonList(receiver);
}
List argumentList = new ArrayList(1 + arguments.size());
argumentList.add(receiver);
argumentList.addAll(arguments);
return argumentList;
}
public static boolean isCacheNeeded(@NotNull JsExpression expression) {
return !(expression instanceof JsLiteral.JsValueLiteral) &&
!JsAstUtils.isEmptyExpression(expression) &&
(!(expression instanceof JsNameRef) || ((JsNameRef) expression).getQualifier() != null);
}
@NotNull
public static JsConditional sure(@NotNull JsExpression expression, @NotNull TranslationContext context) {
JsInvocation throwNPE = new JsInvocation(context.namer().throwNPEFunctionRef());
JsConditional ensureNotNull = notNullConditional(expression, throwNPE, context);
JsExpression thenExpression = ensureNotNull.getThenExpression();
if (thenExpression instanceof JsNameRef) {
JsName name = ((JsNameRef) thenExpression).getName();
if (name != null) {
// associate(cache) ensureNotNull expression to new TemporaryConstVariable with same name.
context.associateExpressionToLazyValue(ensureNotNull, new TemporaryConstVariable(name, ensureNotNull));
}
}
return ensureNotNull;
}
@NotNull
public static String getSuggestedNameForInnerDeclaration(TranslationContext context, DeclarationDescriptor descriptor) {
String suggestedName = "";
DeclarationDescriptor containingDeclaration = descriptor.getContainingDeclaration();
//noinspection ConstantConditions
if (containingDeclaration != null &&
!(containingDeclaration instanceof ClassOrPackageFragmentDescriptor) &&
!(containingDeclaration instanceof AnonymousFunctionDescriptor) &&
!(containingDeclaration instanceof ConstructorDescriptor && isAnonymousObject(containingDeclaration.getContainingDeclaration()))) {
suggestedName = context.getNameForDescriptor(containingDeclaration).getIdent();
}
if (!suggestedName.isEmpty() && !suggestedName.endsWith("$")) {
suggestedName += "$";
}
if (descriptor.getName().isSpecial()) {
suggestedName += "f";
}
else {
suggestedName += context.getNameForDescriptor(descriptor).getIdent();
}
return suggestedName;
}
}
