package src;

import javax.swing.*;

import javax.swing.text.*;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.event.DocumentEvent;

import javax.swing.event.DocumentListener;

// Class for the Improved Text Editor application

public class ImprovedTextEditor extends JFrame {

private JTextArea textArea;

// Constructor to initialize the text editor

public ImprovedTextEditor() {

setTitle("Improved Text Editor"); // Set the title of the window

setSize(600, 600); // Set the size of the window

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Set the close operation when the window is closed

// Set the look and feel of the text area

UIManager.put("TextArea.background", Color.BLACK); // Set background color

UIManager.put("TextArea.foreground", Color.WHITE); // Set text color

// Create a JTextArea for text input

textArea = new JTextArea();

textArea.setFont(new Font("Menlo", Font.PLAIN, 12)); // Set font style and size

JScrollPane scrollPane = new JScrollPane(textArea); // Create a scroll pane to contain the text area

add(scrollPane); // Add the scroll pane to the frame

textArea.setCaretColor(Color.WHITE); // Set the text cursor color to white

// Add line numbers

JTextArea lineNumbers = new JTextArea("1");

lineNumbers.setBackground(Color.DARK_GRAY);

lineNumbers.setForeground(Color.WHITE);

lineNumbers.setEditable(false);

scrollPane.setRowHeaderView(lineNumbers);

textArea.getDocument().addDocumentListener(new DocumentListener() {

public String getText() {

int caretPosition = textArea.getDocument().getLength();

Element root = textArea.getDocument().getDefaultRootElement();

String text = "1\n";

for (int i = 2; i < root.getElementIndex(caretPosition) + 2; i++) {

text += i + "\n";

}

return text;

}

// Update line numbers when text is inserted

@Override

public void insertUpdate(DocumentEvent e) {

lineNumbers.setText(getText());

}

// Update line numbers when text is removed

@Override

public void removeUpdate(DocumentEvent e) {

lineNumbers.setText(getText());

}

// Update line numbers when text is changed

@Override

public void changedUpdate(DocumentEvent e) {

lineNumbers.setText(getText());

}

});

// Create menu bar and menus

JMenuBar menuBar = new JMenuBar();

JMenu fileMenu = new JMenu("File");

// Sub-Items for the "File" JMenu

JMenuItem openItem = new JMenuItem("Open");

JMenuItem saveItem = new JMenuItem("Save-As");

JMenuItem closeItem = new JMenuItem("Close");

JMenu editMenu = new JMenu("Edit");

JMenu fontMenu = new JMenu("Font");

// OPTIONAL ITEMS FOR "EDIT" JMenu

/*

JMenuItem boldItem = new JMenuItem("Bold");

JMenuItem italicItem = new JMenuItem("Italic");

*/

String[] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();

for (String font : fonts) {

fontMenu.add(new JMenuItem(font)).addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

textArea.setFont(new Font(((JMenuItem) e.getSource()).getText(), Font.PLAIN, 12));

}

});

}

editMenu.add(fontMenu);

// Add "Italic" and "Bold" JMenuItem here*

// Search menu bar

JMenu searchMenu = new JMenu("Search");

final JTextField searchField = new JTextField(20);

searchField.setToolTipText("Type what to search and press Enter");

searchMenu.add(searchField);

JMenuItem findItem = new JMenuItem("Find");

findItem.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

String text = textArea.getText();

String searchText = searchField.getText().toLowerCase();

int pos = 0;

while ((pos = text.indexOf(searchText, pos)) >= 0) {

try {

textArea.getHighlighter().addHighlight(pos, pos + searchText.length(),

DefaultHighlighter.DefaultPainter);

pos += searchText.length();

} catch (BadLocationException ex) {

ex.printStackTrace();

}

}

}

});

// Help menu for documentation

JMenu helpMenu = new JMenu("Help");

JMenuItem docsItem = new JMenuItem("Documentation");

docsItem.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

try {

Desktop.getDesktop().browse(new java.net.URI("https://github.com/JeninSutradhar"));

} catch (Exception ex) {

ex.printStackTrace();

}

}

});

// Add action listeners for file menu items

openItem.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

openFile();

}

});

saveItem.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

saveFile();

}

});

closeItem.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

// Add items to file menu

fileMenu.add(openItem);

fileMenu.add(saveItem);

fileMenu.add(closeItem);

// Add file menu to menu bar

menuBar.add(fileMenu);

// Add edit menu to menu bar

menuBar.add(editMenu);

// Add search menu to menu bar

searchMenu.add(findItem);

menuBar.add(searchMenu);

// Add help menu to menu bar

helpMenu.add(docsItem);

menuBar.add(helpMenu);

setJMenuBar(menuBar); // Set the menu bar for the frame

// Apply syntax highlighting

applySyntaxHighlighting();

// Apply auto-indentation

textArea.addKeyListener(new KeyAdapter() {

@Override

public void keyPressed(KeyEvent e) {

if (e.getKeyChar() == '\n') {

autoIndent();

}

}

});

// Display word count

textArea.getDocument().addDocumentListener(new DocumentListener() {

@Override

public void insertUpdate(DocumentEvent e) {

updateWordCount();

}

@Override

public void removeUpdate(DocumentEvent e) {

updateWordCount();

}

@Override

public void changedUpdate(DocumentEvent e) {

updateWordCount();

}

});

}

// Method to open a file

private void openFile() {

JFileChooser fileChooser = new JFileChooser();

int returnValue = fileChooser.showOpenDialog(null);

if (returnValue == JFileChooser.APPROVE_OPTION) {

File selectedFile = fileChooser.getSelectedFile();

try {

BufferedReader reader = new BufferedReader(new FileReader(selectedFile));

textArea.read(reader, null);

reader.close();

} catch (IOException ex) {

JOptionPane.showMessageDialog(this, "Error opening file: " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);

}

}

}

// Method to save a file

private void saveFile() {

JFileChooser fileChooser = new JFileChooser();

int returnValue = fileChooser.showSaveDialog(null);

if (returnValue == JFileChooser.APPROVE_OPTION) {

File selectedFile = fileChooser.getSelectedFile();

try {

BufferedWriter writer = new BufferedWriter(new FileWriter(selectedFile));

textArea.write(writer);

writer.close();

} catch (IOException ex) {

JOptionPane.showMessageDialog(this, "Error saving file: " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);

}

}

}

// Method to apply syntax highlighting

private void applySyntaxHighlighting() {

SyntaxHighlighter.highlight(textArea);

}

// Method to auto-indent text

private void autoIndent() {

int caretPosition = textArea.getCaretPosition();

int lineStart = caretPosition;

while (lineStart > 0 && textArea.getText().charAt(lineStart - 1) != '\n') {

lineStart--;

}

String lineText = textArea.getText().substring(lineStart, caretPosition);

final int[] indentation = {0}; // Declare as final array to make it effectively final

for (int i = 0; i < lineText.length(); i++) {

if (Character.isWhitespace(lineText.charAt(i))) {

indentation[0]++;

} else {

break;

}

}

SwingUtilities.invokeLater(() -> {

textArea.insert("\n" + " ".repeat(indentation[0]), caretPosition);

});

}

// Method to update word count and display in the window title

private void updateWordCount() {

String text = textArea.getText();

int words = text.isEmpty() ? 0 : text.split("\\s+").length;

int characters = text.length();

int lines = textArea.getLineCount();

// Display word count, character count, and line count in the window title

setTitle("Text Editor - Words: " + words + ", Characters: " + characters + ", Lines: " + lines);

}

// Main method to start the application

public static void main(String[] args) {

SwingUtilities.invokeLater(() -> {

ImprovedTextEditor editor = new ImprovedTextEditor();

editor.setVisible(true);

});

}

}

/*

* THIS FEATURE MAY NOT WORK ON SOME SYSTEMS

*/

// Class for syntax highlighting

class SyntaxHighlighter {

// Method to highlight keywords in the text area

public static void highlight(JTextArea textArea) {

DefaultHighlighter highlighter = (DefaultHighlighter) textArea.getHighlighter();

DefaultHighlighter.DefaultHighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);

String[] keywords = {"if", "else", "for", "while", "switch", "case", "break", "continue", "return", "class", "public", "private", "protected"};

for (String keyword : keywords) {

highlightWord(textArea, keyword.toLowerCase(), painter); // Convert keyword to lowercase

}

}

// Method to highlight occurrences of a word in the text area

private static void highlightWord(JTextArea textArea, String word, DefaultHighlighter.DefaultHighlightPainter painter) {

String text = textArea.getText().toLowerCase(); // Convert text to lowercase

int pos = 0;

while ((pos = text.indexOf(word, pos)) >= 0) {

try {

textArea.getHighlighter().addHighlight(pos, pos + word.length(), painter);

// Change the foreground color

textArea.setSelectionColor(Color.GREEN); // Set Custom color here

pos += word.length();

} catch (BadLocationException e) {

e.printStackTrace();

}

}

}

}