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// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.google.dart.compiler.backend.js.ast;

import com.google.dart.compiler.util.AstUtil;
import org.jetbrains.annotations.NotNull;
import com.intellij.util.SmartList;

import java.util.ArrayList;
import java.util.List;

/**
 * Represents a JavaScript block statement.
 */
public class JsBlock extends SourceInfoAwareJsNode implements JsStatement {
    @NotNull
    private final List statements;

    public JsBlock() {
        this(new ArrayList());
    }

    public JsBlock(JsStatement statement) {
        this(new SmartList(statement));
    }

    public JsBlock(JsStatement... statements) {
        this(new SmartList(statements));
    }

    public JsBlock(@NotNull List statements) {
        this.statements = statements;
    }

    @NotNull
    public List getStatements() {
        return statements;
    }

    public boolean isEmpty() {
        return statements.isEmpty();
    }

    public boolean isGlobalBlock() {
        return false;
    }

    @Override
    public void accept(JsVisitor v) {
        v.visitBlock(this);
    }

    @Override
    public void acceptChildren(JsVisitor visitor) {
        visitor.acceptWithInsertRemove(statements);
    }

    @Override
    public void traverse(JsVisitorWithContext v, JsContext ctx) {
        if (v.visit(this, ctx)) {
            v.acceptStatementList(statements);
        }
        v.endVisit(this, ctx);
    }

    @NotNull
    @Override
    public JsBlock deepCopy() {
        return new JsBlock(AstUtil.deepCopy(statements)).withMetadataFrom(this);
    }
}