Sublime Plugin: .codeUnitAt(0)

CodeUnit.py

import sublime
import sublime_plugin
import re

class DartCodeUnitCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    rd = re.compile(r'r?([\'"])(.)\1\.codeUnitAt\(0\)');
    for selection in self.view.sel():
      selectionText = self.view.substr(selection);
      matches = list(rd.finditer(selectionText))
      if (len(matches) > 0):
        for match in reversed(matches):
          matchText = match.group(0)
          originalLength = len(matchText)
          replacement = str(hex(ord(match.group(2)))) + " /*'" + match.group(2) + "'*/"
          selectionText = (selectionText[:match.start(0)] +
                           replacement +
                           selectionText[match.end(0):])
        self.view.replace(edit, selection, selectionText)
      else:
        self.view.replace(edit, selection, selectionText + "/*NO*/");

# Converts: 'x'.codeUnitAt(0)
# To:       0x58 /*'x'*/
# Works with any single-character single-line string.
#
# Add to User keymap:
#    { "keys": ["shift+ctrl+c"], "command": "dart_code_unit" },