jscl.converter.Converter Maven / Gradle / Ivy
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java symbolic computing library and mathematical editor
package jscl.converter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Converter {
public final Pattern pattern = Pattern.compile("(?s:)|(?s:)");
protected final String XML = "";
private final Pattern word = Pattern.compile("[\\w_\\-\\.]+");
private final Pattern http = Pattern.compile("https?://[\\w_\\-\\.:/~\\?=&#]*");
private final Pattern txt = Pattern.compile("(" + word.pattern() + ")(?:/(" + word.pattern() + "))*\\.txt");
private final Pattern mvn = Pattern.compile("(" + word.pattern() + ")#(" + word.pattern() + ");(" + word.pattern() + ")");
private final Pattern mail = Pattern.compile(word.pattern() + "@" + word.pattern());
private final Pattern links = Pattern.compile("(" + http.pattern() + ")|(" + txt.pattern() + ")|(" + mvn.pattern() + ")|(" + mail.pattern() + ")");
private final Pattern newlines = Pattern.compile("\n");
private final Pattern spaces = Pattern.compile("(?m:^ +)|( +)|(\\t)");
private final String mml = " xmlns=\"http://www.w3.org/1998/Math/MathML\"";
private final String svg = " xmlns=\"http://www.w3.org/2000/svg\"";
public String apply(final String str, final String stylesheet) {
return apply(str, stylesheet, null, null, null, null, false);
}
public String apply(final String str, final String stylesheet, final String title, final String feed, final String icon, final String url, final boolean extension) {
final Matcher pm = pattern.matcher(str);
final StringBuffer b = new StringBuffer(XML);
if (stylesheet != null && !stylesheet.isEmpty()) {
b.append("");
}
b.append("\n");
b.append("\n");
if (title != null && !title.isEmpty()) {
b.append("").append(title).append(" \n");
}
if (feed != null && !feed.isEmpty()) {
b.append("\n");
}
if (icon != null && !icon.isEmpty()) {
b.append("\n");
}
b.append("\n");
b.append("\n");
b.append("\n");
int n = 0;
while (pm.find()) {
final int m = pm.start();
final String s = pm.group();
b.append(links(str.substring(n, m), extension));
b.append(insertNameSpace(s));
n = pm.end();
}
b.append(links(str.substring(n), extension));
b.append("\n");
if (url != null) {
b.append("
").append("source\n");
}
b.append("\n");
b.append("\n");
return b.toString();
}
private String links(final String str, final boolean extension) {
final StringBuffer buffer = new StringBuffer();
final Matcher pm = links.matcher(str);
int n = 0;
while (pm.find()) {
final int m = pm.start();
final String s = pm.group();
final Matcher pm0 = txt.matcher(s);
final Matcher pm1 = mvn.matcher(s);
final Matcher pm2 = mail.matcher(s);
buffer.append(newlines(str.substring(n, m)));
if (pm0.matches()) {
buffer.append(" 1) {
buffer.append("/");
}
buffer.append(ss);
}
}
buffer.append(extension?".xhtml":".txt");
buffer.append("\">");
for (int i = 1 ; i <= pm0.groupCount() ; i++) {
final String ss = pm0.group(i);
if (ss != null && (!"index".equals(ss) || i < pm0.groupCount())) {
if (i > 1) {
buffer.append("/");
}
buffer.append(ss);
}
}
buffer.append("");
} else if (pm1.matches()) {
buffer.append(" 1) {
buffer.append("/");
}
buffer.append(ss);
}
buffer.append("\">");
for (int i = 1 ; i <= pm1.groupCount() ; i++) {
final String ss = pm1.group(i);
if (i > 1) {
buffer.append(i == 2?"#":";");
}
buffer.append(ss);
}
buffer.append("");
} else if (pm2.matches()) {
final String ss = pm2.group();
buffer.append("");
buffer.append(ss);
buffer.append("");
} else {
final String ss = special(s);
buffer.append("");
buffer.append(ss);
buffer.append("");
}
n = pm.end();
}
buffer.append(newlines(str.substring(n)));
return buffer.toString();
}
private String newlines(final String str) {
final StringBuffer buffer = new StringBuffer();
final Matcher pm = newlines.matcher(str);
int n = 0;
while (pm.find()) {
final int m = pm.start();
final String s = pm.group();
final String t = spaces(str.substring(n, m));
buffer.append(t.matches("-+")?"
":(m == 0?" ":t) + "
").append("\n");
n = pm.end();
}
buffer.append(spaces(str.substring(n)));
return buffer.toString();
}
private String spaces(final String str) {
final StringBuffer buffer = new StringBuffer();
final Matcher pm = spaces.matcher(str);
int n = 0;
while (pm.find()) {
final int m = pm.start();
final String s = pm.group();
buffer.append(special(str.substring(n, m)));
for (int i = 0; i < s.length(); i++) {
buffer.append(s.charAt(i) == '\t'?"\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0":"\u00a0");
}
n = pm.end();
}
buffer.append(special(str.substring(n)));
return buffer.toString();
}
private String special(final String str) {
return str.replaceAll("&","&").replaceAll("<","<").replaceAll(">",">").replaceAll("\"",""");
}
protected String insertNameSpace(final String str) {
final String m = str.indexOf(mml) > -1?"":mml;
final String s = str.indexOf(svg) > -1?"":svg;
return isSvg(str)?str.substring(0, 4) + s + str.substring(4):str.substring(0, 5) + m + str.substring(5);
}
protected String stripNameSpace(final String str) {
final int n = str.indexOf(mml);
return str.substring(0, n) + str.substring(n + mml.length());
}
protected boolean isSvg(final String str) {
return str.substring(1, 4).compareTo("svg") == 0;
}
public String apply(final Reader reader, final String stylesheet, final String title, final String feed, final String icon, final String url, final boolean extension) throws IOException {
return apply(stringFromReader(reader), stylesheet, title, feed, icon, url, extension);
}
protected String stringFromReader(final Reader reader) throws IOException {
final Writer writer = new StringWriter();
pipe(reader, writer);
writer.close();
return writer.toString();
}
private char buffer[] = new char[8192];
public void pipe(final Reader in, final Writer out) throws IOException {
int n = in.read(buffer);
while (n > -1) {
out.write(buffer, 0, n);
n = in.read(buffer);
}
}
}