com.google.template.soy.jssrc.dsl.Call.java Source code

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Here is the source code for com.google.template.soy.jssrc.dsl.Call.java

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/*
 * Copyright 2016 Google Inc.
 *
 * 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 com.google.template.soy.jssrc.dsl;

import static com.google.template.soy.exprtree.Operator.Associativity.LEFT;

import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.errorprone.annotations.Immutable;
import com.google.template.soy.exprtree.Operator.Associativity;

/** Represents a JavaScript function call. */
@AutoValue
@Immutable
abstract class Call extends Operation {
    abstract CodeChunk.WithValue receiver();

    abstract ImmutableList<CodeChunk.WithValue> args();

    static Call create(CodeChunk.WithValue receiver, ImmutableList<CodeChunk.WithValue> args) {
        ImmutableSet.Builder<CodeChunk> builder = ImmutableSet.builder();
        builder.addAll(receiver.initialStatements());
        for (CodeChunk.WithValue arg : args) {
            builder.addAll(arg.initialStatements());
        }
        return new AutoValue_Call(builder.build(), receiver, args);
    }

    @Override
    int precedence() {
        // The precedence of a JavaScript function call is higher than any Soy operator.
        return Integer.MAX_VALUE;
    }

    @Override
    Associativity associativity() {
        return LEFT;
    }

    @Override
    public void collectRequires(RequiresCollector collector) {
        receiver().collectRequires(collector);
        for (CodeChunk.WithValue arg : args()) {
            arg.collectRequires(collector);
        }
    }

    @Override
    void doFormatOutputExpr(FormattingContext ctx) {
        formatOperand(receiver(), OperandPosition.LEFT, ctx);
        ctx.append('(');
        boolean first = true;
        for (WithValue arg : args()) {
            if (first) {
                first = false;
            } else {
                ctx.append(", ");
            }
            // The comma is the lowest-precedence JavaScript operator, so none of the args
            // need to be protected.
            arg.doFormatOutputExpr(ctx);
        }
        ctx.append(')');
    }

    @Override
    void doFormatInitialStatements(FormattingContext ctx) {
        ctx.appendInitialStatements(receiver());
        for (CodeChunk.WithValue arg : args()) {
            ctx.appendInitialStatements(arg);
        }
    }
}