/*

This is Textile
A Humane Web Text Generator

Original PHP Version
Version 1.0
21 Feb, 2003

Copyright (c) 2003, Dean Allen, www.textism.com
All rights reserved.

This java version by Gareth Simpson 
1.0 April 2003
1.1 mid 2004
1.2 March 2006
_______
LICENSE

Redistribution and use in source and binary forms, with or without 
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, 
  this list of conditions and the following disclaimer.

* 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.

* Neither the name Textile nor the names of its contributors may be used to
  endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.

_____________
USING TEXTILE

Block modifier syntax:

Header: hn. 
Paragraphs beginning with 'hn. ' (where n is 1-6) are wrapped in header tags.
Example: <h1>Text</h1>

Header with CSS class: hn(class).
Paragraphs beginning with 'hn(class). ' receive a CSS class attribute. 
Example: <h1 class="class">Text</h1>

Paragraph: p. (applied by default)
Paragraphs beginning with 'p. ' are wrapped in paragraph tags.
Example: <p>Text</p>

Paragraph with CSS class: p(class).
Paragraphs beginning with 'p(class). ' receive a CSS class attribute. 
Example: <p class="class">Text</p>

Blockquote: bq.
Paragraphs beginning with 'bq. ' are wrapped in block quote tags.
Example: <blockquote>Text</blockquote>

Blockquote with citation: bq(citeurl).
Paragraphs beginning with 'bq(citeurl). ' recieve a citation attribute. 
Example: <blockquote cite="citeurl">Text</blockquote>

Numeric list: #
Consecutive paragraphs beginning with # are wrapped in ordered list tags.
Example: <ol><li>ordered list</li></ol>

Bulleted list: *
Consecutive paragraphs beginning with * are wrapped in unordered list tags.
Example: <ul><li>unordered list</li></ul>


Phrase modifier syntax:

_emphasis_             <em>emphasis</em>
__italic__             <i>italic</i>
*strong*               <strong>strong</strong>
**bold**               <b>bold</b>
??citation??           <cite>citation</cite>
-deleted text-         <del>deleted</del>
+inserted text+        <ins>inserted</ins>
^superscript^          <sup>superscript</sup>
~subscript~            <sub>subscript</sub>
@code@                 <code>computer code</code>

==notextile==          leave text alone (do not format)

"linktext":url         <a href="url">linktext</a>
"linktext(title)":url  <a href="url" title="title">linktext</a>

!imageurl!             <img src="imageurl">
!imageurl(alt text)!   <img src="imageurl" alt="alt text" />
!imageurl!:linkurl     <a href="linkurl"><img src="imageurl" /></a>

ABC(Always Be Closing) <acronym title="Always Be Closing">ABC</acronym>

*/

package jreepad;

import gnu.regexp.*;

import java.util.StringTokenizer;
import java.util.ArrayList;

public class JTextile 
{
  private static final int ENT_COMPAT = 0;
  private static final int ENT_NOQUOTES = 2;
  private static final int ENT_QUOTES = 3;

  
  
  public JTextile() 
  {
  } 

  
  public static String textile(String text) throws Exception
  {
    
    //$text = stripslashes($text);
      
    //# turn any incoming ampersands into a dummy character for now.
    //#  This uses a negative lookahead for alphanumerics followed by a semicolon,
    //#  implying an incoming html entity, to be skipped 
    text = preg_replace("&(?![#a-zA-Z0-9]+;)","x%x%",text);
    
    //# unentify angle brackets and ampersands
    text = replace(text,"&gt;", ">");
    text = replace(text,"&lt;", "<");
    text = replace(text,"&amp;", "&");
    
    
    //# zap carriage returns
    text = replace(text,"\r\n", "\n");
    
  
    //# zap tabs
    text = replace(text,"\t", "" );
    
    //  trim each line
    StringBuffer splitBuffer = new StringBuffer();
    
    String[] sList = text.split("/\n/");
    for(int i = 0; i < sList.length; i++)
    {
      splitBuffer.append(sList[i].trim());
      splitBuffer.append("\n");
    }
    
    text = splitBuffer.toString();

    //### Find and replace quick tags
  
    //# double equal signs mean <notextile>
    text = preg_replace("(^|\\s)==(.*?)==([^\\w]{0,2})","$1<notextile>$2</notextile>$3$4",text);
    
    //# image qtag
    text = preg_replace("!([^!\\s\\(=]+?)\\s?(\\(([^\\)]+?)\\))?!","<img src=\"$1\" alt=\"$3\" />",text);
      
    //# image with hyperlink
    text = preg_replace("(<img.+ \\/>):(\\S+)","<a href=\"$2\">$1</a>",text);

    //# hyperlink qtag
    text = preg_replace("\"([^\"\\(]+)\\s?(\\(([^\\)]+)\\))?\":(\\S+?)([^\\w\\s\\/;]|[1-9]*?)(\\s|$)","<a href=\"$4\" title=\"$3\">$1</a>$5$6",text);
  
    //# arrange qtag delineators and replacements in an array
    String[] srcTags = {"\\*\\*","\\*","\\?\\?","-","\\+","~","@"};
    String[] replaceTags = {"b","strong","cite","del","ins","sub","code"};
  
    //# loop through the array, replacing qtags with html
    for(int i = 0; i < srcTags.length; i++)
    {
      //text = preg_replace("(^|\\s|>)" + srcTags[i] + "\\b(.+?)\\b([^\\w\\s]*?)" + srcTags[i] + "([^\\w\\s]{0,2})(\\s|$)","$1<" + replaceTags[i] + ">$2$3</" + replaceTags[i] + ">$4$5",text);
     text = preg_replace("(^|\\s|>)" + srcTags[i] + "([^ ])(.+?)?([^\\w\\s]*?)([^ ])" + srcTags[i] + "([^\\w\\s]{0,2})(\\s|$)","$1<" + replaceTags[i] + ">$2$3$4$5</" + replaceTags[i] + ">$6$7",text);
    }
    
    //# some weird bs with underscores and \b word boundaries, 
    //#  so we'll do those on their own
    
    text = preg_replace("(^|\\s)__(.*?)__([^\\w\\s]{0,2})","$1<i>$2</i>$3",text);   
    
    text = preg_replace("(^|\\s)_(.*?)_([^\\w\\s]{0,2})","$1<em>$2</em>$3",text); 
    
    text = preg_replace("\\^(.*?)\\^","<sup>$1</sup>",text);

    // ### Find and replace typographic chars and special tags
  
    //# small problem with double quotes at the end of a string
    
    text = preg_replace("\"$","\" ",text);
    
    //# NB: all these will wreak havoc inside <html> tags
      
    String[] glyph_search = {
      "([^\\s[{<])?\\'([dmst]\\b|ll\\b|ve\\b|\\s|$)",  // single closing
      "\\'", // single opening
      "([^\\s[{])?\"(\\s|$)", // # double closing
      "\"", // double opening
      "\\b( )?\\.{3}", // # ellipsis
      "\\b([A-Z][A-Z0-9]{2,})\\b(\\(([^\\)]+)\\))", // # 3+ uppercase acronym
      "(^|[^\"][>\\s])([A-Z][A-Z0-9 ]{2,})([^<a-z0-9]|$)", // # 3+ uppercase caps
      "\\s?--\\s?", // # em dash
      "\\s-\\s", // # en dash
      "(\\d+)-(\\d+)", // # en dash
      "(\\d+) ?x ?(\\d+)", //# dimension sign
      "\\b ?(\\((tm|TM)\\))", // trademark
      "\\b ?(\\([rR]\\))", // # registered
      "\\b ?(\\([cC]\\))" // # registered     
    };
      
      
    String[] glyph_replace = {     
      "$1&#8217;$2",              //# single closing
      "&#8216;",                //# single opening
      "$1&#8221;$2",              //# double closing
      "&#8220;",                //# double opening
      "$1&#8230;",              //# ellipsis
      "<acronym title=\"$2\">$1</acronym>", //# 3+ uppercase acronym
      //"$1<span class=\"caps\">$2</span>$3", //# 3+ uppercase caps
      "$1$2$3", //# 3+ uppercase caps
      "&#8212;",                //# em dash
      " &#8211; ",              //# en dash
      "$1&#8211;$2",              //# en dash
      "$1&#215;$2",             //# dimension sign
      "&#8482;",                //# trademark
      "&#174;",               //# registered
      "&#169;"                //# copyright
    };
        
    

    
    //    # set toggle for turning off replacements between <code> or <pre>
    boolean codepre = false;
   boolean notextile = false;
  
    //# if there is no html, do a simple search and replace
    
    if(!preg_match("<.[^<]*>",text))
    {
      text = preg_replace(glyph_search,glyph_replace,text);
    }
    else 
    {
      
      StringBuffer out = new StringBuffer();
        //# else split the text into an array at <.*>
      //$text = preg_split("/(<.*>)/U",$text,-1,PREG_SPLIT_DELIM_CAPTURE);
      String[] textSplit = preg_split("<.[^<]*>",text);
      for(int i = 0; i < textSplit.length; i++)
      {
          
          //  # matches are off if we're between <code>, <pre> etc. 
          if(preg_match("<(code|pre|kbd)>",textSplit[i].toLowerCase()))
          {
            codepre = true; 
          }
          if(preg_match("<notextile>",textSplit[i].toLowerCase()))
          {
            codepre = true;
         notextile = true;
          }
          else if(preg_match("</(code|pre|kbd)>",textSplit[i].toLowerCase()))
          {
            codepre = false; 
          }
          else if(preg_match("</notextile>",textSplit[i].toLowerCase()))
          {