/*******************************************************************************
* Jalview - A Sequence Alignment Editor and Viewer (Version 2.7)
* Copyright (C) 2011 J Procter, AM Waterhouse, J Engelhardt, LM Lui, G Barton, M Clamp, S Searle
*
* This file is part of Jalview.
*
* Jalview is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
*
* Jalview is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with Jalview. If not, see .
*******************************************************************************/
package jalview.util;
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
/**
* utility class for dealing with HTML link extraction
* @author jprocter
*
*/
public class ParseHtmlBodyAndLinks
{
String orig=null;
public String getOrig()
{
return orig;
}
boolean htmlContent=true;
/**
* @return true if the content looked like HTML
*/
public boolean isHtmlContent()
{
return htmlContent;
}
ArrayList links=new ArrayList();
StringBuffer sb = new StringBuffer();
/**
* result of parsing description - with or without HTML tags
* @return
*/
public String getContent()
{
return sb.toString();
}
/**
* list of Label|Link encoded URL links extracted from HTML
* @return
*/
public ArrayList getLinks() {
return links;
}
/**
*
* @param description - html or text content to be parsed
* @param removeHTML flag to indicate if HTML tags should be removed if they are present.
* @param newline
*/
public ParseHtmlBodyAndLinks(String description,
boolean removeHTML, String newline)
{
if (description==null || description.length()==0)
{
htmlContent=false;
return;
}
if (description.toUpperCase().indexOf("") == -1)
{
htmlContent = false;
}
orig = description;
StringTokenizer st = new StringTokenizer(description, "<");
String token, link;
int startTag;
String tag = null;
while (st.hasMoreElements())
{
token = st.nextToken("&>");
if (token.equalsIgnoreCase("html") || token.startsWith("/"))
{
continue;
}
tag = null;
startTag = token.indexOf("<");
if (startTag > -1)
{
tag = token.substring(startTag + 1);
token = token.substring(0, startTag);
}
if (tag != null && tag.toUpperCase().startsWith("A HREF="))
{
if (token.length() > 0)
{
sb.append(token);
}
link = tag.substring(tag.indexOf("\"") + 1, tag.length() - 1);
String label = st.nextToken("<>");
links.add(label + "|" + link);
sb.append(label + "%LINK%");
}
else if (tag != null && tag.equalsIgnoreCase("br"))
{
sb.append(newline);
}
else if (token.startsWith("lt;"))
{
sb.append("<" + token.substring(3));
}
else if (token.startsWith("gt;"))
{
sb.append(">" + token.substring(3));
}
else if (token.startsWith("amp;"))
{
sb.append("&" + token.substring(4));
}
else
{
sb.append(token);
}
}
if (removeHTML && !htmlContent)
{
// instead of parsing the html into plaintext
// clean the description ready for embedding in html
sb = new StringBuffer(Pattern.compile("<").matcher(description).replaceAll("<"));
}
}
/**
* get either the parsed content or the original, depending on whether the original looked like html content or not.
* @return
*/
public String getNonHtmlContent()
{
return isHtmlContent() ? sb.toString() : orig;
}
}