# SetCharSpacing.java

    /*
     * 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.text;

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

    import org.apache.pdfbox.contentstream.operator.MissingOperandException;
    import org.apache.pdfbox.cos.COSBase;
    import org.apache.pdfbox.cos.COSNumber;
    import org.apache.pdfbox.contentstream.operator.Operator;
    import org.apache.pdfbox.contentstream.operator.OperatorName;
    import org.apache.pdfbox.contentstream.operator.OperatorProcessor;

    /**
     * Tc: Set character spacing.
     *
     * @author Laurent Huault
     */
    public class SetCharSpacing extends OperatorProcessor
    {
        @Override
        public void process(Operator operator, List<COSBase> arguments) throws IOException
        {
            if (arguments.isEmpty())
            {
                throw new MissingOperandException(operator, arguments);
            }

            // there are some documents which are incorrectly structured, and have
            // a wrong number of arguments to this, so we will assume the last argument
            // in the list
            Object charSpacing = arguments.get(arguments.size()-1);
            if (charSpacing instanceof COSNumber)
            {
                COSNumber characterSpacing = (COSNumber)charSpacing;
                context.getGraphicsState().getTextState().setCharacterSpacing(characterSpacing.floatValue());
            }
        }

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