org.jetbrains.kotlin.js.translate.utils.utils.kt Maven / Gradle / Ivy

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/*
 * 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 com.intellij.util.SmartList
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.js.translate.context.Namer
import org.jetbrains.kotlin.js.translate.context.TranslationContext
import org.jetbrains.kotlin.js.translate.utils.TranslationUtils.simpleReturnFunction
import org.jetbrains.kotlin.resolve.DescriptorUtils

fun generateDelegateCall(
        fromDescriptor: FunctionDescriptor,
        toDescriptor: FunctionDescriptor,
        thisObject: JsExpression,
        context: TranslationContext
): JsPropertyInitializer {
    val delegateMemberFunctionName = context.getNameForDescriptor(fromDescriptor)
    val overriddenMemberFunctionName = context.getNameForDescriptor(toDescriptor)
    val overriddenMemberFunctionRef = JsNameRef(overriddenMemberFunctionName, thisObject)

    val parameters = SmartList()
    val args = SmartList()
    val functionScope = context.getScopeForDescriptor(fromDescriptor);

    if (DescriptorUtils.isExtension(fromDescriptor)) {
        val extensionFunctionReceiverName = functionScope.declareName(Namer.getReceiverParameterName())
        parameters.add(JsParameter(extensionFunctionReceiverName))
        args.add(JsNameRef(extensionFunctionReceiverName))
    }

    for (param in fromDescriptor.valueParameters) {
        val paramName = param.name.asString()
        val jsParamName = functionScope.declareName(paramName)
        parameters.add(JsParameter(jsParamName))
        args.add(JsNameRef(jsParamName))
    }

    val functionObject = simpleReturnFunction(context.getScopeForDescriptor(fromDescriptor), JsInvocation(overriddenMemberFunctionRef, args))
    functionObject.parameters.addAll(parameters)
    return JsPropertyInitializer(delegateMemberFunctionName.makeRef(), functionObject)
}