Method handleCommentUncomment

app/src/processing/app/ui/Editor.java:2110–2187

()

  protected void handleCommentUncomment() {
    // log("Entering handleCommentUncomment()");
    startCompoundEdit();

    String prefix = getCommentPrefix();
    int prefixLen = prefix.length();

    int startLine = textarea.getSelectionStartLine();
    int stopLine = textarea.getSelectionStopLine();

    int lastLineStart = textarea.getLineStartOffset(stopLine);
    int selectionStop = textarea.getSelectionStop();
    // If the selection ends at the beginning of the last line,
    // then don't (un)comment that line.
    if (selectionStop == lastLineStart) {
      // Though if there's no selection, don't do that
      if (textarea.isSelectionActive()) {
        stopLine--;
      }
    }

    // If the text is empty, ignore the user.
    // Also ensure that all lines are commented (not just the first)
    // when determining whether to comment or uncomment.
    boolean commented = true;
    for (int i = startLine; commented && (i <= stopLine); i++) {
      String lineText = textarea.getLineText(i).trim();
      if (lineText.length() == 0) {
        continue; //ignore blank lines
      }
      commented = lineText.startsWith(prefix);
    }

    // log("Commented: " + commented);

    // This is the min line start offset of the selection, which is added to
    // all lines while adding a comment. Required when commenting
    // lines which have uneven whitespaces in the beginning. Makes the
    // commented lines look more uniform.
    int lso = Math.abs(textarea.getLineStartNonWhiteSpaceOffset(startLine)
        - textarea.getLineStartOffset(startLine));

    if (!commented) {
      // get min line start offset of all selected lines
      for (int line = startLine+1; line <= stopLine; line++) {
        String lineText = textarea.getLineText(line);
        if (lineText.trim().length() == 0) {
          continue; //ignore blank lines
        }
        int so = Math.abs(textarea.getLineStartNonWhiteSpaceOffset(line)
                              - textarea.getLineStartOffset(line));
        lso = Math.min(lso, so);
      }
    }

    for (int line = startLine; line <= stopLine; line++) {
      int location = textarea.getLineStartNonWhiteSpaceOffset(line);
      String lineText = textarea.getLineText(line);