RegexTester.java

/*
	=========================================================================
			Java Based Regex Expression Testing App
	=========================================================================

	Author : 	Suraj Singh Bisht
				surajsinghbisht054@gmail.com
				www.bitforestinfo.com
				www.blaregroup.com

Reference Docs:
		https://docs.oracle.com/javase/7/docs/api/javax/swing/JFrame.html
		https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html


	Useful Regex CheatSheet

		x 	The character x
		\\ 	The backslash character
		\x{h...h} 	The character with hexadecimal value 0xh...h (Character.MIN_CODE_POINT  <= 0xh...h <=  Character.MAX_CODE_POINT)
		\t 	The tab character ('\u0009')
		\n 	The newline (line feed) character ('\u000A')
		\r 	The carriage-return character ('\u000D')
		\f 	The form-feed character ('\u000C')
		\a 	The alert (bell) character ('\u0007')
		\e 	The escape character ('\u001B')
		\cx 	The control character corresponding to x
		 
		Character classes
		[abc] 	a, b, or c (simple class)
		[^abc] 	Any character except a, b, or c (negation)
		[a-zA-Z] 	a through z or A through Z, inclusive (range)
		[a-d[m-p]] 	a through d, or m through p: [a-dm-p] (union)
		[a-z&&[def]] 	d, e, or f (intersection)
		[a-z&&[^bc]] 	a through z, except for b and c: [ad-z] (subtraction)
		[a-z&&[^m-p]] 	a through z, and not m through p: [a-lq-z](subtraction)
		 
		Predefined character classes
		. 	Any character (may or may not match line terminators)
		\d 	A digit: [0-9]
		\D 	A non-digit: [^0-9]
		\h 	A horizontal whitespace character: [ \t\xA0\u1680\u180e\u2000-\u200a\u202f\u205f\u3000]
		\H 	A non-horizontal whitespace character: [^\h]
		\s 	A whitespace character: [ \t\n\x0B\f\r]
		\S 	A non-whitespace character: [^\s]
		\v 	A vertical whitespace character: [\n\x0B\f\r\x85\u2028\u2029]
		\V 	A non-vertical whitespace character: [^\v]
		\w 	A word character: [a-zA-Z_0-9]
		\W 	A non-word character: [^\w]
		 
		POSIX character classes (US-ASCII only)
		\p{Lower} 	A lower-case alphabetic character: [a-z]
		\p{Upper} 	An upper-case alphabetic character:[A-Z]
		\p{ASCII} 	All ASCII:[\x00-\x7F]
		\p{Alpha} 	An alphabetic character:[\p{Lower}\p{Upper}]
		\p{Digit} 	A decimal digit: [0-9]
		\p{Alnum} 	An alphanumeric character:[\p{Alpha}\p{Digit}]
		\p{Punct} 	Punctuation: One of !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
		\p{Graph} 	A visible character: [\p{Alnum}\p{Punct}]
		\p{Print} 	A printable character: [\p{Graph}\x20]
		\p{Blank} 	A space or a tab: [ \t]
		\p{Cntrl} 	A control character: [\x00-\x1F\x7F]
		\p{XDigit} 	A hexadecimal digit: [0-9a-fA-F]
		\p{Space} 	A whitespace character: [ \t\n\x0B\f\r]
		 
		java.lang.Character classes (simple java character type)
		\p{javaLowerCase} 	Equivalent to java.lang.Character.isLowerCase()
		\p{javaUpperCase} 	Equivalent to java.lang.Character.isUpperCase()
		\p{javaWhitespace} 	Equivalent to java.lang.Character.isWhitespace()
		\p{javaMirrored} 	Equivalent to java.lang.Character.isMirrored()
		 
		Classes for Unicode scripts, blocks, categories and binary properties
		\p{IsLatin} 	A Latin script character (script)
		\p{InGreek} 	A character in the Greek block (block)
		\p{Lu} 	An uppercase letter (category)
		\p{IsAlphabetic} 	An alphabetic character (binary property)
		\p{Sc} 	A currency symbol
		\P{InGreek} 	Any character except one in the Greek block (negation)
		[\p{L}&&[^\p{Lu}]] 	Any letter except an uppercase letter (subtraction)
		 
		Boundary matchers
		^ 	The beginning of a line
		$ 	The end of a line
		\b 	A word boundary
		\B 	A non-word boundary
		\A 	The beginning of the input
		\G 	The end of the previous match
		\Z 	The end of the input but for the final terminator, if any
		\z 	The end of the input
		 
		Linebreak matcher
		\R 	Any Unicode linebreak sequence, is equivalent to \u000D\u000A|[\u000A\u000B\u000C\u000D\u0085\u2028\u2029]
		 
		Greedy quantifiers
		X? 	X, once or not at all
		X* 	X, zero or more times
		X+ 	X, one or more times
		X{n} 	X, exactly n times
		X{n,} 	X, at least n times
		X{n,m} 	X, at least n but not more than m times
		 
		Reluctant quantifiers
		X?? 	X, once or not at all
		X*? 	X, zero or more times
		X+? 	X, one or more times
		X{n}? 	X, exactly n times
		X{n,}? 	X, at least n times
		X{n,m}? 	X, at least n but not more than m times
		 
		Possessive quantifiers
		X?+ 	X, once or not at all
		X*+ 	X, zero or more times
		X++ 	X, one or more times
		X{n}+ 	X, exactly n times
		X{n,}+ 	X, at least n times
		X{n,m}+ 	X, at least n but not more than m times
		 
		Logical operators
		XY 	X followed by Y
		X|Y 	Either X or Y
		(X) 	X, as a capturing group
		 
		Back references
		\n 	Whatever the nth capturing group matched
		\k<name> 	Whatever the named-capturing group "name" matched
		 
		Quotation
		\ 	Nothing, but quotes the following character
		\Q 	Nothing, but quotes all characters until \E
		\E 	Nothing, but ends quoting started by \Q
		 
		Special constructs (named-capturing and non-capturing)
		(?<name>X) 	X, as a named-capturing group
		(?:X) 	X, as a non-capturing group
		(?idmsuxU-idmsuxU)  	Nothing, but turns match flags i d m s u x U on - off
		(?idmsux-idmsux:X)   	X, as a non-capturing group with the given flags i d m s u x on - off
		(?=X) 	X, via zero-width positive lookahead
		(?!X) 	X, via zero-width negative lookahead
		(?<=X) 	X, via zero-width positive lookbehind
		(?<!X) 	X, via zero-width negative lookbehind
		(?>X) 	X, as an independent, non-capturing group

*/
// import modules
import sidebar.*;  //package
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.text.Highlighter;
import java.util.regex.*;

// Main class
public class RegexTester extends JFrame implements DocumentListener{
    private final String template = "RegexTester is created By surajsinghbisht054, and is proudly hosted by Github. Edit the Expression & Text to see matches.\n\n You Can Use This App To Test Your Java Regex Pattern Over Raw Data. \n\n Simple Copy Your Data Into TextArea And Then\nType Your Regular Patter over expression input box. \nEvery matching Character and String Get Highlighted.\n\n This Help User Quickly Test and Find Regex Pattern. "; 
    private JTextField regex_exp = new JTextField("");
	private JTextArea regex_data = new JTextArea(template);
	private String input_exp;
	private String output_exp;
	private Highlighter brush;
	private Pattern pattern;
	private Matcher matcher;
	Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(new Color(165, 94, 234));
	private Border bd = BorderFactory.createRaisedBevelBorder();
	public  SideBar sidebar= new SideBar();


	// highlight text method
	private void highlight_text(int start, int end){
		try{
			brush.addHighlight(start, end, painter);
		}catch (Exception error){
			System.out.println(error);
		}

	}


	private void process_data(){
		//System.out.println("Trigger");
		brush.removeAllHighlights();
		input_exp = regex_exp.getText(); // Pattern
		output_exp = regex_data.getText(); // Raw Data
		//System.out.print(output_exp);
		try{

			pattern = Pattern.compile(input_exp); // Pattern Ready
			matcher = pattern.matcher(output_exp);
			// Highligting
			while(true){

				if (matcher.find()) {
					highlight_text(matcher.start(), matcher.end());			
				}else{
					break;
				}
			}

		}catch (Exception error){
			
		}

	}
	public void changedUpdate(DocumentEvent e) {
		process_data();
	}
	public void removeUpdate(DocumentEvent e) {
		process_data();
	}
	public void insertUpdate(DocumentEvent e) {
		process_data();
	}

	/* constructor */
	RegexTester(){
		setLayout(new BorderLayout(15,15));
		regex_exp.setBorder(BorderFactory.createTitledBorder(bd, "Regex Pattern Input"));
		regex_exp.setForeground(new Color(206, 214, 224));
		regex_exp.setFont(regex_exp.getFont().deriveFont(Font.BOLD, 16f));
		regex_exp.setBackground(new Color(119, 140, 163));

		regex_data.setBorder(BorderFactory.createTitledBorder(bd, "Regex Raw Data"));
		regex_data.setBackground(new Color(209, 216, 224));
		regex_data.setForeground(new Color(47, 53, 66));
		regex_data.setFont(regex_data.getFont().deriveFont(Font.BOLD, 12f));

		JPanel panel = new JPanel();
		panel.setLayout(new BorderLayout(15,15));

		JScrollPane scrollp = new JScrollPane(regex_data);

		
		JScrollPane sidebarscroll = new JScrollPane(sidebar);
		sidebarscroll.setSize(100,200);



		panel.add(regex_exp,BorderLayout.NORTH);
		panel.add(scrollp,BorderLayout.CENTER);
        
		//add(regex_exp, BorderLayout.NORTH);	
		//add(scrollp, BorderLayout.CENTER);
		add(panel,BorderLayout.CENTER);
		add(sidebarscroll,BorderLayout.WEST);
		regex_exp.getDocument().addDocumentListener(this);
		regex_data.getDocument().addDocumentListener(this);
		brush = regex_data.getHighlighter();
		System.out.println("[+] Check Java File Source Code For Pattern Reference Cheat Sheet");
	}

	/* Main function Trigger  */
	public static void main(String[] args){
		RegexTester obj = new RegexTester(); // initialise object 
		obj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		obj.setSize(1200, 600);
		obj.setTitle("Java Regex Tester By BlareGroup");
		obj.setVisible(true);
		obj.pack();
		obj.setFocusable(true);
	}}