!7

cm DiffTwoSnippets {
  S s1, s2;
  transient JTextArea taDiff;
  
  visual northAndCenterWithMargins(
    centerAndEastWithMarginInbetween(jhgrid(
      withLabel("Snippet 1 (\"-\"):", onEnter(jLiveValueTextField_bothWays(dm_fieldLiveValue('s1)), rThread go)),
      withLabel("Snippet 2 (\"+\"):", onEnter(jLiveValueTextField_bothWays(dm_fieldLiveValue('s2)), rThread go))),
      jbutton("Diff!", rThread go)),
    taDiff = typeWriterTextArea());

  void go enter {
    temp dm_tempDisableButtons();
    S text1 = loadSnippet(trim(s1));
    S text2 = loadSnippet(trim(s2));
    setText(taDiff, "Diff between " + s1 + " and " + s2 + ":\n\n"
      + or2(unidiff_rtrim(text1, text2), "no differences");
  }
}