const Aliases = {
  t: {
    help: 'title',
    get text() info().title,
  },
  u: {
    help: 'URL',
    get text() info().url,
  },
  a: {
    help: 'title and URL as link tag',
    get text(){ with(info()) return <a href={url}>{title}</a>.toXMLString() },
  },
  f: {
    help: 'favicon as data:image/png',
    get text() img2du(Utils.currentChromeWindow.gBrowser.selectedTab.image),
  },
  s: {
    help: 'selection as anchor text',
    get text(){
      with(info())
        return ((<a href={url} title={title}><x/></a>+'')
                .replace(/\s*<x\/>\s{0,}/, CmdUtils.getSelection()));
    }
  },
  h: {
    help: 'selection as HTML',
    get text() CmdUtils.getHtmlSelection(),
  },
  q: {
    help: 'selection as blockquote',
    get text(){
      with(info())
        return ((<blockquote cite={url} title={title}><x/></blockquote>+'')
                .replace(/\s*<x\/>\s{0,}/, CmdUtils.getHtmlSelection()));
    }
  },
  m: {
    help: 'selection as markdown',
    get text(){
      with(info())
        return ('['+CmdUtils.getSelection()+']('+url+' "'+title+'")');
    }
  },
  i: {
    help: 'selected image (or "1x1 transparent" if none) as data:image/png',
    get text(){
      var doc = CmdUtils.getDocument();
      return img2du(
        (/^image/.test(doc.contentType)
         ? doc.URL
         : (/src=([\"\']?)(\S+?)\1/(CmdUtils.getHtmlSelection())||0)[2]),
        ('data:image/png;base64,'+
         'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAA'+
         'AAC0lEQVQI12NgYAAAAAMAASDVlMcAAAAASUVORK5CYII='));
    }
  },
  j: {
    help: 'snapshot of current tab as data:image/jpeg',
    get text() CmdUtils.getWindowSnapshot(CmdUtils.getWindow(), {width: 600}),
  },
  M: {
    help: 'selection as MD5 hash',
    get text() Utils.computeCryptoHash('MD5', CmdUtils.getSelection()),
  },
  S: {
    help: 'selection as SHA1 hash',
    get text() Utils.computeCryptoHash('SHA1', CmdUtils.getSelection()),
  },
  d: {
    help: 'current datetime in RFC3399 format',
    get text() new Date().toString('yyyy-MM-ddThh:mm:ddZ'),
  },
  J: {
    help: 'URL as JSON',
    get text(){
      var {url} = info(), o = {url: url},
      a = context.focusedWindow.document.createElement('a');
      a.href = url;
      for each(var p in ['protocol', 'host', 'pathname', 'search', 'hash'])
        o[p] = a[p];
      o.query =  o.search ? Utils.urlToParams(o.search) : {};
      return Utils.encodeJson(o);
    },
  },
  X: {
    help: 'selection as hex',
    get text(){
      return CmdUtils.getSelection()
       .replace(/[^ -~]|\\/g, function(m0){
          var code = m0.charCodeAt(0);
          return '\\u' + ((code < 0x10) ? '000' :
                          (code < 0x100) ? '00' :
                          (code < 0x1000) ? '0' : '')
                          + code.toString(16); });
    }
  },
  x: {
    help: 'selected hex as unescaped',
    get text(){
      return CmdUtils.getSelection()
        .replace(/\\u([a-fA-F0-9]{4})/g, function(m0, m1){
          return String.fromCharCode(parseInt(m1, 16)); });
    }
  },
  P: {
    help: 'selection as EncodeURIComponent (UTF-8)',
    get text(){
      return encodeURIComponent(CmdUtils.getSelection());
    }
  },
  p: {
    help: 'selection as DecodeURIComponent (UTF-8)',
    get text(){
      return decodeURIComponent(CmdUtils.getSelection());
    }
  },
  n: {
    help: 'line feed character',
    text: '\n',
  },
  T: {
    help: 'tab character',
    text: '\t',
  },
  /*
  _: {
    help: '',
    get text(){},
  },
   */
},
REA = RegExp('['+ [k for(k in Aliases)] +']', 'g'),
Help = ('<ul style="list-style:none; margin:0.2em; padding:0">'+
        [<li><tt><b>{k}</b>:</tt>{v.help}</li>
          for([k, v] in Iterator(Aliases))].join('') +
        '</ul>'),
DUCache = {'': 'data:,...'};
function img2du(src, ph)(
  DUCache[src] ||
  (CmdUtils.getImageSnapshot(src, function(du){ DUCache[src] = du }),
   DUCache[src] = ph || DUCache['']));
function info(){
  var t, u, {top, document: {title, URL}} = CmdUtils.getWindow();
  (/^https?:\/\/www\.google\.\w+\/reader\/view/.test(URL)
   ? ({title: t, url: u}) = top.wrappedJSObject.getPermalink() :
   /^https?:\/\/(?:reader\.livedoo|fastladde)r\.com\/reader/.test(URL)
   ? ({title: t, link: u}) = top.wrappedJSObject.get_active_item(1) : 0);
  return {title: t || title, url: u || URL};
}
function parse(txt) txt.replace(REA, replr);
function replr(m) Aliases[m].text;
CmdUtils.CreateCommand({
  names: ['copy'],
  icon: 'chrome://ubiquity/skin/icons/convert.png',
  arguments: [{role: 'object', nountype: { 
    label: '?',
    suggest: function(txt, htm, cb, sx){
      if(sx || !txt) return [];
      var s = {text: txt, summary: txt.replace(REA, this.mark)};
      this.default = function() s;
      return [s];
    },
    mark: function($) '<u>'+ $ +'</u>',
  }}],
  description: ('Collects various informations into a text'+
                ' and sends it to your clipboard.'),
  help: (<>Try "copy tnu" to copy the page title and url
         separated by a new line.<br/><br/>
         [ Aliases ]</> + Help),
  execute: function({object: {text}}){
    if(!text) return;
    Utils.clipboard.text = parse(text);
    displayMessage({icon: this.icon, title: this.name, text: text});
  },
  preview: function(pbl, {object: {text}}){
    pbl.innerHTML =
      <pre>{parse(text) || <em>empty</em>}</pre>.toXMLString() + Help;
  },
  previewDelay: 222,
  author: 'satyr'.link('http://ubigist.appjet.net/?o=satyr'),
  contributors: ['powchin'.link('http://friendfeed.com/powchin')],
  license: 'MIT',
});