/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.pdfbox.contentstream.operator.markedcontent;

import java.io.IOException;
import java.util.List;

import org.apache.pdfbox.contentstream.PDFStreamEngine;
import org.apache.pdfbox.contentstream.operator.MissingOperandException;
import org.apache.pdfbox.contentstream.operator.Operator;
import org.apache.pdfbox.contentstream.operator.OperatorName;
import org.apache.pdfbox.contentstream.operator.OperatorProcessor;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.pdmodel.documentinterchange.markedcontent.PDPropertyList;

/**
 * BDC : Begins a marked-content sequence with property list.
 *
 * @author Johannes Koch
 */
public class BeginMarkedContentSequenceWithProperties extends OperatorProcessor
{
    public BeginMarkedContentSequenceWithProperties(PDFStreamEngine context)
    {
        super(context);
    }

    @Override
    public void process(Operator operator, List<COSBase> operands) throws IOException
    {
        if (operands.size() < 2)
        {
            throw new MissingOperandException(operator, operands);
        }
        if (!(operands.get(0) instanceof COSName))
        {
            return;
        }
        PDFStreamEngine context = getContext();
        COSName tag = (COSName) operands.get(0);
        COSBase op1 = operands.get(1);
        COSDictionary propDict = null;
        if (op1 instanceof COSName)
        {
            // PDFBOX-5980 and SO79549651
            PDPropertyList prop = context.getResources().getProperties((COSName) op1);
            if (prop != null)
            {
                propDict = prop.getCOSObject();
            }
        }
        else if (op1 instanceof COSDictionary)
        {
            propDict = (COSDictionary) op1;
        }
        if (propDict == null)
        {
            // wrong type or property not found
            return;
        }
        context.beginMarkedContentSequence(tag, propDict);
    }

    @Override
    public String getName()
    {
        return OperatorName.BEGIN_MARKED_CONTENT_SEQ;
    }
}
