PSFormatter.java Source code

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Here is the source code for PSFormatter.java

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/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
import java.io.*;

/** Text to PS */
public class PSFormatter {
    /** The current input source */
    protected BufferedReader br;
    /** The current page number */
    protected int pageNum;
    /** The current X and Y on the page */
    protected int curX, curY;
    /** The current line number on page */
    protected int lineNum;
    /** The current tab setting */
    protected int tabPos = 0;
    public static final int INCH = 72; // PS constant: 72 pts/inch

    // Page parameters
    /** The left margin indent */
    protected int leftMargin = 50;
    /** The top of page indent */
    protected int topMargin = 750;
    /** The bottom of page indent */
    protected int botMargin = 50;

    // FORMATTING PARAMETERS
    protected int points = 12;
    protected int leading = 14;

    public static void main(String[] av) throws IOException {
        if (av.length == 0)
            new PSFormatter(new InputStreamReader(System.in)).process();
        else
            for (int i = 0; i < av.length; i++) {
                new PSFormatter(av[i]).process();
            }
    }

    public PSFormatter(String fileName) throws IOException {
        br = new BufferedReader(new FileReader(fileName));
    }

    public PSFormatter(Reader in) throws IOException {
        if (in instanceof BufferedReader)
            br = (BufferedReader) in;
        else
            br = new BufferedReader(in);
    }

    /** Main processing of the current input source. */
    protected void process() throws IOException {

        String line;

        prologue(); // emit PostScript prologue, once.

        startPage(); // emit top-of-page (ending previous)

        while ((line = br.readLine()) != null) {
            if (line.startsWith("\f") || line.trim().equals(".bp")) {
                startPage();
                continue;
            }
            doLine(line);
        }

        // finish last page, if not already done.
        if (lineNum != 0)
            println("showpage");
    }

    /** Handle start of page details. */
    protected void startPage() {
        if (pageNum++ > 0)
            println("showpage");
        lineNum = 0;
        moveTo(leftMargin, topMargin);
    }

    /** Process one line from the current input */
    protected void doLine(String line) {
        tabPos = 0;
        // count leading (not imbedded) tabs.
        for (int i = 0; i < line.length(); i++) {
            if (line.charAt(i) == '\t')
                tabPos++;
            else
                break;
        }
        String l = line.trim(); // removes spaces AND tabs
        if (l.length() == 0) {
            ++lineNum;
            return;
        }
        moveTo(leftMargin + (tabPos * INCH), topMargin - (lineNum++ * leading));
        println('(' + toPSString(l) + ") show");

        // If we just hit the bottom, start a new page
        if (curY <= botMargin)
            startPage();
    }

    /** Overly-simplistic conversion to PS, e.g., breaks on "foo\)bar" */
    protected String toPSString(String o) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < o.length(); i++) {
            char c = o.charAt(i);
            switch (c) {
            case '(':
                sb.append("\\(");
                break;
            case ')':
                sb.append("\\)");
                break;
            default:
                sb.append(c);
                break;
            }
        }
        return sb.toString();
    }

    protected void println(String s) {
        System.out.println(s);
    }

    protected void moveTo(int x, int y) {
        curX = x;
        curY = y;
        println(x + " " + y + " " + "moveto");
    }

    void prologue() {
        println("%!PS-Adobe");
        println("/Courier findfont " + points + " scalefont setfont ");
    }
}