/**
 * Example written by Bruno Lowagie in answer to:
 * http://stackoverflow.com/questions/28709603/draw-a-line-every-n-words-using-itextsharp
 */
package sandbox.events;

import com.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import sandbox.WrapToTest;

/**
 *
 * @author iText
 */
@WrapToTest
public class Every25Words {
    
    public static final String DEST = "results/events/every25words.pdf";
    
    public class WordCounter extends PdfPageEventHelper {

        public int count = 0;
        
        @Override
        public void onGenericTag(PdfWriter writer, Document document, Rectangle rect, String text) {
            count++;
            if (count % 25 == 0) {
                PdfContentByte canvas = writer.getDirectContent();
                canvas.saveState();
                canvas.setLineDash(5, 5);
                canvas.moveTo(document.left(), rect.getBottom());
                canvas.lineTo(rect.getRight(), rect.getBottom());
                canvas.lineTo(rect.getRight(), rect.getTop());
                canvas.lineTo(document.right(), rect.getTop());
                canvas.stroke();
                canvas.restoreState();
            }
        }
    }
    
    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new Every25Words().createPdf(DEST);
    }
    public void createPdf(String dest) throws IOException, DocumentException {
        Document document = new Document();
        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
        writer.setPageEvent(new WordCounter());
        writer.setInitialLeading(16);
        document.open();
        String[] words = readFile().split("\\s+");
        Chunk chunk = null;
        for (String word : words) {
            if (chunk != null) {
                document.add(new Chunk(" "));
            }
            chunk = new Chunk(word);
            chunk.setGenericTag("");
            document.add(chunk);
        }
        document.close();
    }
    
    public String readFile() throws IOException {
        StringBuilder sb = new StringBuilder();
        BufferedReader in = new BufferedReader(
            new InputStreamReader(new FileInputStream("resources/text/liber1_1_la.txt"), "UTF8"));
        String str;
        while ((str = in.readLine()) != null) {
            sb.append(str);
        }
        return sb.toString();
    }
}