Markdown List (-)

script

// Prefix lines in selection with listChar

var listChar = "-" // set to prefered prefix
var lnRange = editor.getSelectedLineRange();
var ln = editor.getTextInRange(lnRange[0],lnRange[1]);
var selRange = editor.getSelectedRange();

// split lines
var lines = ln.split('\n');
var charsAdded = 0;

// loop over lines adding prefix
for (var ix=0; ix < lines.length; ix++) {
  if (lines[ix].length > 0 && !lines[ix].startsWith(listChar)) {
    var prefix = listChar;
    if (lines[ix][0] != " ") {
      prefix = listChar + " ";
    }
    lines[ix] = prefix + lines[ix];
    charsAdded = charsAdded + prefix.length;
  }
}

// update text and selection with new values
editor.setTextInRange(lnRange[0],lnRange[1],lines.join("\n"));
if (lines.length > 2) {
  editor.setSelectedRange(lnRange[0]+lnRange[1]+charsAdded, 0);
}
else {
  editor.setSelectedRange(selRange[0]+charsAdded,selRange[1]);
}