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Java > Open Source Codes > org > pdfbox > util > operator > ShowTextGlyph


1 /**
2  * Copyright (c) 2004, www.pdfbox.org
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  * 3. Neither the name of pdfbox; nor the names of its
14  * contributors may be used to endorse or promote products derived from this
15  * software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
26  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  * http://www.pdfbox.org
29  *
30  */
31 package org.pdfbox.util.operator;
32
33 import java.util.List JavaDoc;
34
35 import org.pdfbox.util.Matrix;
36 import org.pdfbox.util.PDFOperator;
37 import org.pdfbox.cos.COSArray;
38 import org.pdfbox.cos.COSBase;
39 import org.pdfbox.cos.COSNumber;
40 import java.io.IOException JavaDoc;
41 import org.pdfbox.cos.COSString;
42
43 /**
44  * <p>Titre : PDFEngine Modification.</p>
45  * <p>Description : Structal modification of the PDFEngine class : the long sequence of
46  * conditions in processOperator is remplaced by this strategy pattern</p>
47  * <p>Copyright : Copyright (c) 2004</p>
48  * <p>Société : DBGS</p>
49  * @author Huault : huault@free.fr
50  * @version $Revision: 1.6 $
51  */
52
53 public class ShowTextGlyph extends OperatorProcessor
54 {
55     /**
56      * TJ Show text, allowing individual glyph positioning.
57      * @param operator The operator that is being executed.
58      * @param arguments List
59      * @throws IOException If there is an error processing this operator.
60      */
61     public void process(PDFOperator operator, List JavaDoc arguments) throws IOException JavaDoc
62     {
63         COSArray array = (COSArray)arguments.get( 0 );
64         float adjustment=0;
65         for( int i=0; i<array.size(); i++ )
66         {
67             COSBase next = array.get( i );
68             if( next instanceof COSNumber )
69             {
70                 adjustment = ((COSNumber)next).floatValue();
71
72                 Matrix adjMatrix = new Matrix();
73                 adjustment=(-adjustment/1000)*context.getGraphicsState().getTextState().getFontSize() *
74                     (context.getGraphicsState().getTextState().getHorizontalScalingPercent()/100);
75                 adjMatrix.setValue( 2, 0, adjustment );
76                 context.setTextMatrix( adjMatrix.multiply( context.getTextMatrix() ) );
77             }
78             else if( next instanceof COSString )
79             {
80                 context.showString( ((COSString)next).getBytes() );
81             }
82             else
83             {
84                 throw new IOException JavaDoc( "Unknown type in array for TJ operation:" + next );
85             }
86         }
87     }
88
89 }
90
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