/*
* Created on Nov 5, 2009
* (c) 2009 Trumpet, Inc.
*
*/
package com.itextpdf.text.pdf.parser;
import java.awt.geom.AffineTransform;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfWriter;
/**
* @author kevin
*/
public class TextExtractionTest {
String TEXT1 = "TEXT1 TEXT1";
String TEXT2 = "TEXT2 TEXT2";
@Before
public void setUp() throws Exception {
}
@After
public void tearDown() throws Exception {
}
@Test
public void testCoLinnearText() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, 0, false, 0);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testCoLinnearTextWithSpace() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, 0, false, 2);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
//saveBytesToFile(bytes, new File("c:/temp/test.pdf"));
Assert.assertEquals(TEXT1 + " " + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testCoLinnearTextEndingWithSpaceCharacter() throws Exception{
// in this case, we shouldn't be inserting an extra space
TEXT1 = TEXT1 + " ";
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, 0, false, 2);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
//saveBytesToFile(bytes, new File("c:/temp/test.pdf"));
Assert.assertEquals(TEXT1 + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testUnRotatedText() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, 0, true, -20);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + "\n" + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testRotatedText() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, -90, true, -20);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + "\n" + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testPartiallyRotatedText() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, TEXT2, 33, true, -20);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + "\n" + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testWordSpacingCausedByExplicitGlyphPositioning() throws Exception{
byte[] bytes = createPdfWithArrayText(TEXT1, TEXT2, 250);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + " " + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testWordSpacingCausedByExplicitGlyphPositioning2() throws Exception{
byte[] bytes = createPdfWithArrayText("[(S)3.2(an)-255.0(D)13.0(i)8.3(e)-10.1(g)1.6(o)-247.5(C)2.4(h)5.8(ap)3.0(t)10.7(er)]TJ");
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals("San Diego Chapter", ex.getTextFromPage(1));
}
@Test
public void testTrailingSpace() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1 + " ", TEXT2, 0, false, 20);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + " " + TEXT2, ex.getTextFromPage(1));
}
@Test
public void testLeadingSpace() throws Exception{
byte[] bytes = createPdfWithRotatedText(TEXT1, " " + TEXT2, 0, false, 20);
PdfTextExtractor ex = new PdfTextExtractor(new PdfReader(bytes));
Assert.assertEquals(TEXT1 + " " + TEXT2, ex.getTextFromPage(1));
}
private static byte[] createPdfWithArrayText(String directContentTj) throws Exception{
final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
final Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, byteStream);
document.setPageSize(PageSize.LETTER);
document.open();
PdfContentByte cb = writer.getDirectContent();
BaseFont font = BaseFont.createFont();
cb.transform(AffineTransform.getTranslateInstance(100, 500));
cb.beginText();
cb.setFontAndSize(font, 12);
cb.getInternalBuffer().append(directContentTj + "\n");
cb.endText();
document.close();
final byte[] pdfBytes = byteStream.toByteArray();
return pdfBytes;
}
private static byte[] createPdfWithArrayText(String text1, String text2, int spaceInPoints) throws Exception{
final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
final Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, byteStream);
document.setPageSize(PageSize.LETTER);
document.open();
PdfContentByte cb = writer.getDirectContent();
BaseFont font = BaseFont.createFont();
cb.beginText();
cb.setFontAndSize(font, 12);
cb.getInternalBuffer().append("[(" + text1 + ")" + (-spaceInPoints) + "(" + text2 + ")]TJ\n");
cb.endText();
document.close();
final byte[] pdfBytes = byteStream.toByteArray();
return pdfBytes;
}
private static byte[] createPdfWithRotatedText(String text1, String text2, float rotation, boolean moveTextToNextLine, float moveTextDelta) throws Exception {
final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
final Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, byteStream);
document.setPageSize(PageSize.LETTER);
document.open();
PdfContentByte cb = writer.getDirectContent();
BaseFont font = BaseFont.createFont();
float x = document.getPageSize().getWidth()/2;
float y = document.getPageSize().getHeight()/2;
cb.transform(AffineTransform.getTranslateInstance(x, y));
cb.moveTo(-10, 0);
cb.lineTo(10, 0);
cb.moveTo(0, -10);
cb.lineTo(0, 10);
cb.stroke();
cb.beginText();
cb.setFontAndSize(font, 12);
cb.transform(AffineTransform.getRotateInstance(rotation/180f*Math.PI));
cb.showText(text1);
if (moveTextToNextLine)
cb.moveText(0, moveTextDelta);
else
cb.transform(AffineTransform.getTranslateInstance(moveTextDelta, 0));
cb.showText(text2);
cb.endText();
document.close();
final byte[] pdfBytes = byteStream.toByteArray();
return pdfBytes;
}
/**
* Used for testing only if we need to open the PDF itself
* @param bytes
* @param file
* @throws Exception
*/
private void saveBytesToFile(byte[] bytes, File file) throws Exception{
final FileOutputStream outputStream = new FileOutputStream(file);
outputStream.write(bytes);
outputStream.close();
System.out.println("PDF dumped to " + file.getAbsolutePath());
}
}