/**
    * 
    */
   package edu.odu.cs.codeAnnotation;
   
   import java.io.BufferedReader;
   import java.io.BufferedWriter;
   import java.io.FileReader;
   import java.io.FileWriter;
  import java.io.IOException;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  
  /**
   * Annotates C++ & Java source code for inclusion in LaTeX documents
   * (using the listings package).
   * 
   * Annotations supported are:
   *     #...# => <:\smvdots:>  small vertical dots, the # stand for the slash-asterisk asterisk-slash comment markers
   *     //... => <:\smvdots:>
   *     #+N# => <+N>    These commands are repeated line-by-line, N an integer 1..3
   *     #-N# => <-N> 
   *     #coN# => <:\conum{n}:>   call-out numbers, N=1..9
   * @author zeil
   *
   */
  public class Code2TeXSimple {
  	
  	BufferedReader input;
  	BufferedWriter output;
  	
  	public Code2TeXSimple (String filename) throws IOException
  	{
  		input = new BufferedReader (new FileReader(filename));
  		output = new BufferedWriter (new FileWriter(filename + ".tex"));
  	}
  	
  	public Code2TeXSimple () throws IOException
  	{
  		input = null;
  		output = null;
  	}
  
  	/**
  	 * @param args
  	 * @throws IOException 
  	 */
  	public static void main(String[] args) throws IOException {
  		// takes source code file name as first parameter
  		new Code2TeXSimple(args[0]).process();
  	}
  
  	/**
  	 * Carry out substitutions across an entire file
  	 * @throws IOException
  	 */
  	public void process() throws IOException {
  		StringBuffer buf = new StringBuffer();
  		String line;
  		while ((line = input.readLine()) != null) {
  			buf.append(line);
  			buf.append("\n");
  		}
  		String result = process (buf.toString());
  		output.write (result, 0, result.length());
  		output.close();
  	}
  
  	/**
  	 * Carry out substitutions within a multi-line string
  	 * @param sourceCode
  	 * @return soureCode with substitutions
  	 */
  	public String process(String sourceCode) {
  		Pattern dots = Pattern.compile("/\\*\\**\\.\\.\\.\\*/");
  		Matcher m = dots.matcher(sourceCode);
  		while (m.find()) {
  			String before = sourceCode.substring(0, m.start());
  			String block = "<:\\smvdots:>";
  			String after = sourceCode.substring(m.end());
  			sourceCode = before + block + after;
  			m = dots.matcher(sourceCode);
  		}
  		Pattern dots2 = Pattern.compile("//\\.\\.\\.");
  		m = dots2.matcher(sourceCode);
  		while (m.find()) {
  			String before = sourceCode.substring(0, m.start());
  			String block = "<:\\smvdots:>";
  			String after = sourceCode.substring(m.end());
  			sourceCode = before + block + after;
  			m = dots.matcher(sourceCode);
  		}
  		
  		Pattern callout = Pattern.compile("/\\*\\**co(\\d+)\\*/");
  		m = callout.matcher(sourceCode);
  		while (m.find()) {
  			String before = sourceCode.substring(0, m.start());
  			String block = "<:\\conum{" + m.group(1) + "}:>";
 			String after = sourceCode.substring(m.end());
 			sourceCode = before + block + after;
 			m = dots.matcher(sourceCode);
 		}
 		
 		
 		Pattern plusBlock = Pattern.compile("(?s)/\\*\\+\\*/(.*?)/\\*\\**-\\*/");
 		m = plusBlock.matcher(sourceCode);
 		while (m.find()) {
 			String before = sourceCode.substring(0, m.start());
 			String block = m.group(1);
 			String after = sourceCode.substring(m.end());
 			block = block.replaceAll("\n", "<-1>\n<+1>");
 			sourceCode = before + "<+1>" + block + "<-1>" + after;
 			m = plusBlock.matcher(sourceCode);
 		}
 		
 		plusBlock = Pattern.compile("(?s)/\\*\\+1\\*/(.*?)/\\*\\**-1\\*/");
 		m = plusBlock.matcher(sourceCode);
 		while (m.find()) {
 			String before = sourceCode.substring(0, m.start());
 			String block = m.group(1);
 			String after = sourceCode.substring(m.end());
 			block = block.replaceAll("\n", "<-1>\n<+1>");
 			sourceCode = before + "<+1>" + block + "<-1>" + after;
 			m = plusBlock.matcher(sourceCode);
 		}
 		
 		plusBlock = Pattern.compile("(?s)/\\*\\+2\\*/(.*?)/\\*\\**-2\\*/");
 		m = plusBlock.matcher(sourceCode);
 		while (m.find()) {
 			String before = sourceCode.substring(0, m.start());
 			String block = m.group(1);
 			String after = sourceCode.substring(m.end());
 			block = block.replaceAll("\n", "<-2>\n<+2>");
 			sourceCode = before + "<+2>" + block + "<-2>" + after;
 			m = plusBlock.matcher(sourceCode);
 		}
 
 		
 		plusBlock = Pattern.compile("(?s)/\\*\\+3\\*/(.*?)/\\*\\**-3\\*/");
 		m = plusBlock.matcher(sourceCode);
 		while (m.find()) {
 			String before = sourceCode.substring(0, m.start());
 			String block = m.group(1);
 			String after = sourceCode.substring(m.end());
 			block = block.replaceAll("\n", "<-3>\n<+3>");
 			sourceCode = before + "<+3>" + block + "<-3>" + after;
 			m = plusBlock.matcher(sourceCode);
 		}
 
 		return sourceCode;
 	}
 
 }