Huge print files generated by jdk1.2 rc1

Name: tb29552 Date: 10/29/98


/*
 This program produces clipped output under jdk1.1.7, and is
 the subject of bug 4179886. The program simply formats
 and prints a file specified on the command line.

 Compiling and running the same program under jdk1.2 rc1
 generates such a huge print file that I have never been
 able to wait around long enough to see whether anything
 comes out. For example, using a 15 line text file as follows:

 012345678901234567890line1
 012345678901234567890line2
 012345678901234567890line3
 012345678901234567890line4
 012345678901234567890line5
 012345678901234567890line6
 012345678901234567890line7
 012345678901234567890line8
 012345678901234567890line9
 012345678901234567890line10
 012345678901234567890line11
 012345678901234567890line12
 012345678901234567890line13
 012345678901234567890line14
 012345678901234567890line15

 produces an output file of 446 KB!!

 System: Windows NT 4 service pack 3
 Printers: HP LaserJet 4Si MX

 What is going on??
 */
 /*
  * This example simply formats the contents of a file to a printer (N.B. does
  * not expand tabs..)
  *
  * Usage: java PrintBug nameOfFile e.g. java PrintBug c:\temp\myjunk.text
  *
  * When the program is compiled and run under jdk1.1.6, the text is printed
  * only into the region of the page that is effectively printed by the
  * printer. Under jdk1.1.7, everything seems to be translated up and to the
  * left, with the effect that the part of text is clipped.
  *
  * System: Windows NT 4 service pack 3 Printers: HP LaserJet 4Si MX
  *
  * Program PrintBug.java follows:
  *
  */
import java.awt.*;
import java.io.*;

public class PrintBug {
    private PrintJob _pJob;
    private Frame _aFrame;

    public static void main(String[] argv) {
        if (argv.length < 1) {
            System.out.println("Usage: java PrintBug someFile ");
            System.out.println();
            System.out.println(" e.g. java PrintBug c:\\temp\\myjunk.txt ");
            System.exit(1);
        }
        FileReader fr;
        try {
            fr = new FileReader(argv[0]);
            LineNumberReader lnr = new LineNumberReader(fr);
            (new PrintBug ()).printIt(lnr);
            System.exit(0);
        } catch(FileNotFoundException e) {
            System.out.println("No such file: " + argv[0]);
        }
    }

    public PrintBug () {
        Frame _aFrame = new Frame();

        /*
         * Reference Bug IDs 4136947 and 4093775: Even though the PrinterBug
         * class has a Frame, it is never displayed (ie. setVisible(true) is
         * never called) so the "default" font for the frame is never
         * initialized since that doesn't happen until addNotify which isn't
         * done until the peer is created and no peer is ever created. Btw,
         * this happens in both jdk 1.1.x and jdk 1.2.
         */
        _aFrame.pack();
        _aFrame.setVisible(true);

        _pJob = _aFrame.getToolkit().getPrintJob(_aFrame, "Printed output ",
                                                 null);
        if (_pJob == null) {
            System.out.println("No print job..");
            System.exit(0);
        }
    }

    protected void printIt(LineNumberReader lnr) {
        Graphics pg = _pJob.getGraphics();

        int leadingChars = 0;
        int leadingLines = 0;
        int trailingLines = 0;

        int pageNum = 1;
        int linesForThisPage = 0;
        int linesForThisJob = 0;

        String nextLine;

        int pageHeight = _pJob.getPageDimension().height;
        int pageWidth = _pJob.getPageDimension().width;
        // System.out.println("_pJob.getPageDimension().height returns
        // + pageHeight);
        // System.out.println("_pJob.getPageDimension().width returns "+
        // pageWidth);
        int fontSize = 12;
        Font fixed = new Font("Monospaced", Font.PLAIN, fontSize);
        FontMetrics fm = pg.getFontMetrics(fixed);
        // System.out.println("fm.charWidth(' ') returns " +fm.charWidth('
        // '));
        while (fm.charWidth(' ') * (132 + leadingChars) > pageWidth ||
               fm.getHeight() * (66 + leadingLines +
                                 trailingLines) > pageHeight) {
            fontSize--;
            fixed = new Font("Monospaced", Font.PLAIN,
                             fontSize);
            fm = pg.getFontMetrics(fixed);
            // System.out.println("fm.charWidth(' ') returns "
            // +fm.charWidth(' '));
        }

        // Have to set the font to get any output!
        pg.setFont(fixed);
        fm = pg.getFontMetrics(fixed);
        int fontHeight = fm.getHeight();
        int fontDescent = fm.getDescent();
        int curHeight = leadingLines * fontHeight;
        int inPixels = leadingChars * fm.charWidth(' ');
        try {
            do {
                nextLine = lnr.readLine();
                if (nextLine != null) {
                    if (curHeight + fontHeight *
                        (trailingLines + 1) > pageHeight) {
                        // New Page
                        // System.out.println ("" + linesForThisPage + "
                        // lines printed for page " + pageNum);
                        pageNum++;
                        linesForThisPage = 0;
                        pg.dispose();
                        pg = _pJob.getGraphics();
                        if (pg != null) {
                            pg.setFont(fixed);
                        }
                        curHeight = leadingLines *
                            fontHeight;
                    }
                    curHeight += fontHeight;
                    if (pg != null) {
                        pg.drawString(nextLine,
                                      inPixels, curHeight - fontDescent);
                        linesForThisPage++;
                        linesForThisJob++;
                    } else {
                        System.out.println("pg null ");
                    }
                }
            } while (nextLine != null);
        } catch(EOFException eof) {
            // Fine, ignore
        } catch(Throwable t) { // Anything else
            t.printStackTrace();
        }
        // Send last page to the printer;
        pg.dispose();
        System.out.println("" + linesForThisPage + " lines printed for page " +
                           pageNum);
        System.out.println("pages printed: " + pageNum);
        System.out.println("total lines printed: " +
                           linesForThisJob);
        // Clean-up
        _pJob.end();
    }
}

(Review ID: 41519)
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