GenIncrementalDomExprsVisitor.java

/*
 * 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.incrementaldomsrc;

import com.google.common.base.Preconditions;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.AssistedInject;
import com.google.template.soy.error.ErrorReporter;
import com.google.template.soy.jssrc.dsl.CodeChunk;
import com.google.template.soy.jssrc.internal.GenJsExprsVisitor;
import com.google.template.soy.jssrc.internal.JsExprTranslator;
import com.google.template.soy.jssrc.internal.TemplateAliases;
import com.google.template.soy.jssrc.internal.TranslationContext;
import com.google.template.soy.jssrc.restricted.SoyJsSrcPrintDirective;
import com.google.template.soy.soytree.PrintNode;
import com.google.template.soy.soytree.SoyNode;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/** Overrides the base class to provide the correct helpers classes. */
public final class GenIncrementalDomExprsVisitor extends GenJsExprsVisitor {

  /** Injectable factory for creating an instance of this class. */
  public interface GenIncrementalDomExprsVisitorFactory extends GenJsExprsVisitorFactory {}

  @AssistedInject
  public GenIncrementalDomExprsVisitor(
      Map<String, SoyJsSrcPrintDirective> soyJsSrcDirectivesMap,
      JsExprTranslator jsExprTranslator,
      IncrementalDomGenCallCodeUtils genCallCodeUtils,
      IsComputableAsIncrementalDomExprsVisitor isComputableAsJsExprsVisitor,
      GenIncrementalDomExprsVisitorFactory genIncrementalDomExprsVisitorFactory,
      @Assisted TranslationContext translationContext,
      @Assisted ErrorReporter errorReporter,
      @Assisted TemplateAliases templateAliases) {
    super(
        soyJsSrcDirectivesMap,
        jsExprTranslator,
        genCallCodeUtils,
        isComputableAsJsExprsVisitor,
        genIncrementalDomExprsVisitorFactory,
        translationContext,
        errorReporter,
        templateAliases);
  }

  @Override
  public List<CodeChunk.WithValue> exec(SoyNode node) {
    // HTML PrintNodes in idom are not directly computable as expressions. However, the idom codegen
    // emits them by wrapping the result of this visitor in an idom command statement, so we need to
    // skip this check for PrintNodes.
    Preconditions.checkArgument(
        node instanceof PrintNode || isComputableAsJsExprsVisitor.exec(node));
    chunks = new ArrayList<>();
    visit(node);
    return chunks;
  }
}