// java2html.java
import java.io.*;
import java.util.*;
/**
* I found this litle gem at
* http://www.geocities.com/SiliconValley/Horizon/6481/Java2HTML.html
* and modified it slightly to add unique colors for strings
* and the two different comment types both of which are also italicized.
* All default colors are websafe and can be customized by
* specifying an optimal colors property file.
*
* @author Melinda Green - Superliminal Software
*/
public class java2html
{
private static final String keywords[] =
{
"abstract", "default", "if", "private", "throw",
"boolean", "do", "implements", "protected", "throws",
"break", "double", "import", "public", "transient",
"byte", "else", "instanceof", "return", "try",
"case", "extends", "int", "short", "void",
"catch", "final", "interface", "static", "volatile",
"char", "finally", "long", "super", "while",
"class", "float", "native", "switch",
"const", "for", "new", "synchronized",
"continue", "goto", "package", "this"
};
private static Vector keyw = new Vector(keywords.length);
static
{
for (int i = 0; i < keywords.length; i++)
keyw.addElement(keywords[i]);
}
private static int tabsize = 4;
private static String
bgcolor = "FFFFFF", // white
txcolor = "000000", // black
kwcolor = "3333FF", // light hard blue
cmcolor = "009900", // dark faded green
c2color = "999999", // light gray
stcolor = "FF0000"; // red
private static void convert(String source) throws IOException
{
String dest = source + ".html";
System.out.println(dest);
FileReader in = new FileReader(source);
FileWriter out = new FileWriter(dest);
out.write("<html>\r\n<head>\r\n<title>");
out.write(source);
out.write("</title>\r\n</head>\r\n<body ");
out.write("bgcolor=\"" + bgcolor +"\" ");
out.write("text=\"" + txcolor +"\">\r\n");
out.write("<pre>\r\n");
StringBuffer buf = new StringBuffer(2048);
int c = 0, kwl = 0, bufl = 0;
int nexttolast = 0; // just for handling case of >> "\\" << which is not escaping a double quote
char ch = 0, lastch = 0;
int s_normal = 0;
int s_string = 1;
int s_char = 2;
int s_comline = 3;
int s_comment = 4;
int state = s_normal;
while (c != -1)
{
c = in.read();
nexttolast = lastch;
lastch = ch;
ch = c >= 0 ? (char) c : 0;
if (state == s_normal)
if (kwl == 0 && Character.isJavaIdentifierStart(ch)
&& !Character.isJavaIdentifierPart(lastch)
|| kwl > 0 && Character.isJavaIdentifierPart(ch))
{
buf.append(ch);
bufl++;
kwl++;
continue;
} else
if (kwl > 0)
{
String kw = buf.toString().substring(buf.length() - kwl);
if (keyw.contains(kw))
{
buf.insert(buf.length() - kwl,
"<font color=\"" + kwcolor + "\">");
buf.append("</font>");
}
kwl = 0;
}
switch (ch)
{
case '&':
buf.append("&");
bufl++;
break;
case '\"': // double quote
buf.append(""");
bufl++;
if (state == s_normal) { // start string
state = s_string;
buf.insert(buf.length() - """.length(),
"<font color=\"" + stcolor + "\"><i>");
}
else
if (state == s_string && ((lastch != '\\') || (lastch == '\\' && nexttolast == '\\'))) {
// inside a string and found either a non-escaped closing double quote,
// so close the string.
buf.append("</i></font>");
state = s_normal;
}
break;
case '\'': // single quote
buf.append("\'");
bufl++;
if (state == s_normal)
state = s_char;
else
if (state == s_char && lastch != '\\')
state = s_normal;
break;
case '\\': // backslash
buf.append("\\");
bufl++;
if(lastch == '\\')
nexttolast = '\\';
if (lastch == '\\' && (state == s_string || state == s_char))
;//lastch = 0;
break;
case '/': // forward slash
buf.append("/");
bufl++;
if(state == s_string || state == s_comline)
break;
if (state == s_comment && lastch == '*') // star slash ends c++ comment
{
buf.append("</i></font>");
state = s_normal;
}
if(state == s_comment)
break;
if (lastch == '/') // second forward slash starts line comment
{
buf.insert(buf.length() - 2,
"<font color=\"" + cmcolor + "\"><i>");
state = s_comline;
}
break;
case '*':
buf.append("*");
bufl++;
if (state == s_normal && lastch == '/') // slash star starts c++ comment
{
buf.insert(buf.length() - 2,
"<font color=\"" + c2color + "\"><i>");
state = s_comment;
}
break;
case '<':
buf.append("<");
bufl++;
break;
case '>':
buf.append(">");
bufl++;
break;
case '\t':
int n = bufl / tabsize * tabsize + tabsize;
while (bufl < n)
{
buf.append(' ');
bufl++;
}
break;
case '\r':
case '\n':
if (state == s_comline) // EOL ends line comment
{
buf.append("</i></font>");
state = s_normal;
}
buf.append(ch);
if (buf.length() >= 1024)
{
out.write(buf.toString());
buf.setLength(0);
}
bufl = 0;
if (kwl != 0)
kwl = 0; // This should never execute
if (state != s_normal && state != s_comment)
state = s_normal; // Syntax Error
break;
case 0:
if (c < 0)
{
if (state == s_comline)
{
buf.append("</font>");
state = s_normal;
}
out.write(buf.toString());
buf.setLength(0);
bufl = 0;
if (state == s_comment)
{
// Syntax Error
buf.append("</font>");
state = s_normal;
}
break;
}
default:
bufl++;
buf.append(ch);
}
}
out.write("</pre>\r\n</body>\r\n</html>");
in.close();
out.close();
}
public static void main(String args[])
{
if (args.length < 1 || args.length > 2)
{
System.out.println("java2html converter + syntax coloring + tabs2spaces");
System.out.println("");
System.out.println("java [java_opt] java2html [colors_file] source");
System.out.println("");
System.out.println(" - java is the name of the Java interpreter");
System.out.println(" - java_opt are the options of the Java interpreter");
System.out.println(" - java2html is the name of this application");
System.out.println(" - colors_file (optional) is the path ");
System.out.println(" of a file which has a structure like this:");
System.out.println(" tabsize=number (default value is 4)");
System.out.println(" bgcolor=RRGGBB (default value is " + bgcolor + ") - background");
System.out.println(" txcolor=RRGGBB (default value is " + txcolor + ") - source code");
System.out.println(" kwcolor=RRGGBB (default value is " + kwcolor + ") - keywords");
System.out.println(" cmcolor=RRGGBB (default value is " + cmcolor + ") - // comments");
System.out.println(" c2color=RRGGBB (default value is " + c2color + ") - /* comments");
System.out.println(" stcolor=RRGGBB (default value is " + stcolor + ") - strings");
System.out.println(" - source is a file or the directory to the Java source file(s)");
System.out.println("");
System.out.println("Examples:");
System.out.println(" java java2html java2html.java");
System.out.println(" java java2html C:\\TEMP");
System.out.println(" java java2html java2html.properties C:\\TEMP");
System.exit(1);
}
String source, propfile;
if (args.length == 2)
{
propfile = args[0];
source = args[1];
}
else
{
propfile = "java2html.properties";
source = args[0];
}
try
{
InputStream in = new FileInputStream(propfile);
Properties prop = new Properties();
prop.load(in);
in.close();
tabsize = Integer.parseInt(prop.getProperty("tabsize", "4"));
bgcolor = "#" + prop.getProperty("bgcolor", bgcolor);
txcolor = "#" + prop.getProperty("txcolor", txcolor);
kwcolor = "#" + prop.getProperty("kwcolor", kwcolor);
cmcolor = "#" + prop.getProperty("cmcolor", cmcolor);
c2color = "#" + prop.getProperty("c2color", c2color);
stcolor = "#" + prop.getProperty("stcolor", stcolor);
}
catch (FileNotFoundException e){}
catch (IOException e) { System.out.println(e); }
catch (NumberFormatException e) { System.out.println(e); }
File f = new File(source);
if (f.isFile())
{
try { convert(f.getPath()); }
catch (IOException e) { System.out.println(e); }
}
else if (f.isDirectory())
{
try
{
String src[] = f.list();
for (int i = 0; i < src.length; i++)
if (src[i].endsWith(".java"))
convert(new File(f, src[i]).getPath());
}
catch (IOException e) { System.out.println(e); }
}
else
{
System.out.println("The source parameter must be an existent file or directory");
System.out.println("Run java2html without parameters for help");
}
}
}