/*
 * 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.util.operator;

import java.util.List;

import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSNumber;
import org.apache.pdfbox.util.Matrix;
import org.apache.pdfbox.util.PDFOperator;

/**
 *
 * @author Huault : huault@free.fr
 * @version $Revision: 1.4 $
 */
public class MoveText extends OperatorProcessor
{

    /**
     * process : Td : Move text position.
     * @param operator The operator that is being executed.
     * @param arguments List
     */
    public void process(PDFOperator operator, List<COSBase> arguments)
    {
        if (arguments.size() < 2)
        {
            return;
        }
        COSBase base0 = arguments.get(0);
        COSBase base1 = arguments.get(1);
        if (!(base0 instanceof COSNumber))
        {
            return;
        }
        if (!(base1 instanceof COSNumber))
        {
            return;
        }
        COSNumber x = (COSNumber) base0;
        COSNumber y = (COSNumber) base1;
        Matrix td = new Matrix();
        td.setValue( 2, 0, x.floatValue() );
        td.setValue( 2, 1, y.floatValue() );
        context.setTextLineMatrix( td.multiply( context.getTextLineMatrix() ) );
        context.setTextMatrix( context.getTextLineMatrix().copy() );
    }
}
