upper/lower/title/flipped case

cases.ubiq.js

function casecmd(fn) CmdUtils.CreateCommand({
  name: fn.name +' case',
  description: 'Makes text '+ fn.name +' case.',
  icon: icon(fn('Aa')),
  argument: noun_arb_text,
  execute: function case_execute({object: {text, html}}){
    if(!text) return;
    var t = fn(text);
    CmdUtils.setSelection(fn(html), {text: t}) || CmdUtils.copyToClipboard(t);
  },
  preview: function case_preview(pb, {object: {html}}){
    pb.innerHTML = html ? fn(html) : this.previewDefault(pb);
  },
});
function icon(txt){
  var cv = CmdUtils.getHiddenWindow().document.createElementNS(
    'http://www.w3.org/1999/xhtml', 'canvas');
  cv.width = cv.height = 16;
  var cc = cv.getContext('2d');
  cc.font = '16px monospace';
  cc.textBaseline = 'top';
  cc.fillStyle = 'rgba(0,0,0,0.8)';
  cc.fillText(txt, 0, 0);
  return cv.toDataURL('image/png');
}
casecmd(function upper(s) s.toUpperCase())
casecmd(function lower(s) s.toLowerCase());
casecmd(function title(s){
  return s.replace(
    /\w(\w*)/g, function($, r) $[0].toUpperCase() + r.toLowerCase());
});
casecmd(function flipped(s){
  var r = '', v;
  for each(let c in s)
    r += c === (v = c.toUpperCase()) ? c.toLowerCase() : v;
  return r;
});

$.extend(feed, {
  authors: [{name: 'powchin', homepage: 'http://friendfeed.com/powchin'},
            {name: 'satyr'  , homepage: 'http://friendfeed.com/matyr'}],
  license: 'MIT',
});