/*
 * Replace an HTML/XML tag with another, preserving all the rest:
 * - attributes (even with incorrect syntax)
 * - whitespace
 * - character data
 *
 * by De Franciscis Dimitri
 *
 * megadix@gmail.com
 */

import java.util.regex.*;
import java.util.LinkedList;

LinkedList history = new LinkedList();

org_megadix_replaceTag() {

  dialog = new JDialog(view, "Replace HTML/XML tags", false);
  content = new JPanel();
  dialog.setContentPane(content);

  fieldPanel = new JPanel();
  
  srcTagLabel = new JLabel("Tag to be replaced:");
  fieldPanel.add(srcTagLabel);
  
  srcTagField = new HistoryTextField("org.megadix.jedit.macro.replaceTag.srcTag");
  srcTagField.setColumns(10);
  fieldPanel.add(srcTagField);
  
  content.add(fieldPanel);  
  
  destTagLabel = new JLabel("Replace with:");
  fieldPanel.add(destTagLabel);
  
  destTagField = new HistoryTextField("org.megadix.jedit.macro.replaceTag.destTag");
  destTagField.setColumns(10);
  fieldPanel.add(destTagField);
  
  content.add(fieldPanel);  
  
  buttonPanel = new JPanel();
  buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.X_AXIS));
  buttonPanel.add(Box.createGlue());
  ok = new JButton("OK");
  cancel = new JButton("Cancel");
  ok.setPreferredSize(cancel.getPreferredSize());
  dialog.getRootPane().setDefaultButton(ok);
  buttonPanel.add(ok);
  buttonPanel.add(Box.createHorizontalStrut(6));
  buttonPanel.add(cancel);
  buttonPanel.add(Box.createGlue());
  content.add(buttonPanel, "South");
  
  // register this method as an ActionListener for
  // the buttons and text fields (see the section called "Register the Action Listeners")
  ok.addActionListener(this);
  cancel.addActionListener(this);
  srcTagField.addActionListener(this);

  // locate the dialog in the center of the
  // editing pane and make it visible (see the section called "Make the Dialog Visible")
  dialog.pack();
  dialog.setLocationRelativeTo(view);
  dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
  dialog.setVisible(true);

  // this method will be called when a button is clicked
  // or when ENTER is pressed (see the section called "The Action Listener")
  void actionPerformed(e) {
      if(e.getSource() != cancel) {
          processText();
      }
      dialog.dispose();
  }
  
  // this is where the work gets done to insert
  // the prefix and suffix (see the section called "Get the User's Input")
  void processText() {
      String srcTag = srcTagField.getText();
      srcTag = srcTag.replaceAll("[<>]", "");
      srcTag = "<(/?)" + srcTag + "([^>]*)>";
      
      String destTag = destTagField.getText();
      destTag = destTag.replaceAll("[<>\\[\\$\\\\]", "");
      destTag = "<$1" + destTag + "$2>";
      
      if(srcTag.length() == 0 || destTag.length() == 0)
          return;
      
      srcTagField.addCurrentToHistory();
      destTagField.addCurrentToHistory();
      
      try {
        buffer.beginCompoundEdit();
        
        String source = textArea.getText();
        Pattern pattern = Pattern.compile(srcTag, Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(source);
        
        /*
        source = matcher.replaceAll(destTag);
        textArea.setText(source);
        */
        
        //like matcher.replaceAll():
        //source = matcher.replaceAll(replacement);
        // but with replace count
        
        int count = 0;
        StringBuffer sb = new StringBuffer();
        while(matcher.find()){
          count++;
          matcher.appendReplacement(sb, destTag);
        }
        matcher.appendTail(sb);
        
        source = sb.toString();

        if (count == 0) {
          Macros.message(view, "No tags found");
        }
        else {
          textArea.setText(source);
          Macros.message(view, count + " occurrences replaced");
        }
        
      } finally {
        buffer.endCompoundEdit();
      }
  }
}

org_megadix_replaceTag();