papertoolkit.paper.sheets.PDFSheet.java Source code

Introduction

Here is the source code for papertoolkit.paper.sheets.PDFSheet.java

Source

package papertoolkit.paper.sheets;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import papertoolkit.paper.Sheet;
import papertoolkit.render.SheetRenderer;
import papertoolkit.render.sheets.PDFSheetRenderer;
import papertoolkit.units.Points;
import papertoolkit.util.DebugUtils;

import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfReader;

/**
 * <p>
 * Create a Sheet that is based on a single page of a PDF file. Since a sheet is one page, if we have a
 * multipage PDF, we can only access one page of it. Later on, we will add support for Bundles to read
 * multipage PDFs.
 * </p>
 * <p>
 * <span class="BSDLicense"> This software is distributed under the <a
 * href="http://hci.stanford.edu/research/copyright.txt">BSD License</a>.</span>
 * </p>
 * 
 * @author <a href="http://graphics.stanford.edu/~ronyeh">Ron B Yeh</a> (ronyeh(AT)cs.stanford.edu)
 */
public class PDFSheet extends Sheet {

    private File file;

    private int pageNum;

    private PdfReader pdfReader;

    /**
     * This will create a Sheet out of page 1 of the PDF File.
     * 
     * @param pdfFile
     */
    public PDFSheet(File pdfFile) {
        this(pdfFile, 1);
    }

    /**
     * @param pdfFile
     * @param pageNumber
     *            Which page should we create this sheet out of?
     */
    public PDFSheet(File pdfFile, int pageNumber) {
        file = pdfFile;

        pageNum = pageNumber;
        try {
            pdfReader = new PdfReader(new FileInputStream(file));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // PDF pages count from 1, not 0
        final int numberOfPages = pdfReader.getNumberOfPages();
        if (pageNum < 1) {
            System.out.println(
                    "WARNING: pageNum: " + pageNum + " is an invalid page. Setting it to 1. (PDFSheet.java)");
            pageNum = 1;
        }
        if (pageNum > numberOfPages) {
            System.out.println("WARNING: pageNum: " + pageNum + " is an invalid page. Setting it to "
                    + numberOfPages + ". (PDFSheet.java)");
            pageNum = numberOfPages;
        }

        // get the size of page
        final Rectangle pageSize = pdfReader.getPageSize(pageNum);
        setSize(new Points(pageSize.width()), new Points(pageSize.height()));

        // hmm... how should we handle rotations?
        // DebugUtils.println("The Rotation of the PDFSheet is: " + pdfReader.getPageRotation(pageNumber));
    }

    /**
     * @see papertoolkit.paper.Sheet#getRenderer()
     */
    public SheetRenderer getRenderer() {
        return new PDFSheetRenderer(this);
    }

    /**
     * @return
     */
    public PdfReader getReader() {
        return pdfReader;
    }
}