navkeys

navkeys.uc.js

/*==uc==
@name    navkeys
@desc    personal key binds for caret-movement, scrolling and selection
@include main
@include ~^chrome://global/content/view(?:Partial)?Source\.xul
@author  satyr
==/uc==*/
https://developer.mozilla.org/ja/XUL/List_of_commands
NavKey = {s: {
  H : 'scrollLeft',
  J : 'scrollLineDown',
  K : 'scrollLineUp',
  L : 'scrollRight',
  N : 'scrollPageDown',
  P : 'scrollPageUp',
  I : 'wordNext',
  U : 'wordPrevious',
  Y : 'beginLine',
  O : 'endLine',
  $H: 'selectCharPrevious',
  $J: 'selectLineNext',
  $K: 'selectLinePrevious',
  $L: 'selectCharNext',
  $N: 'selectPagePrevious',
  $P: 'selectPageNext',
  $I: 'selectWordNext',
  $U: 'selectWordPrevious',
  $Y: 'selectBeginLine',
  $O: 'selectEndLine',
  Q : 'selectNone',
  ',': function scrollHalfDn(){ NavKey.scroll(0, +1/2) },
  '.': function scrollHalfUp(){ NavKey.scroll(0, -1/2) },
  '@': function markPoint(){
    NavKey.run `
      return content._nkPoint = [content.scrollX, content.scrollY]
    `
  },
  '$`': function gotoMark(){
    NavKey.run `
      var p = content._nkPoint || [0, 0]
      content.scrollTo(...p)
      return '-> '+ p
    `
  },
},
scroll: function NK_scroll(x, y){
  NavKey.run(`
    content.scrollBy(content.innerWidth * ${x}, content.innerHeight * ${y})
  `)
},
say: function NK_say(msg){
  gBrowser.getStatusPanel().label = msg
},
run: function NK_run(js){
  var mm = gBrowser.selectedBrowser.messageManager
    , id = 'NavKey'+ Math.random()
  function done(msg){
    mm.removeMessageListener(id, done)
    if(msg) NavKey.say(msg.data)
  }
  mm.addMessageListener(id, done)
  mm.loadFrameScript('data:,'+ encodeURIComponent(`
    sendAsyncMessage('${id}', (() => {${js}})())
  `), false)
},
};
{
  let keyset = document.querySelector('keyset');
  for(let [k, cmd] in new Iterator(NavKey.s)){
    let key = keyset.appendChild(document.createElement('key'));
    if(k[0] === '$'){
      k = k[1];
      key.setAttribute('modifiers', 'shift');
    }
    let isfn = typeof cmd === 'function';
    let name = isfn ? cmd.name : cmd;
    key.setAttribute('key', k);
    key.setAttribute(
      'oncommand',
      isfn ? /{[^]+}/.exec(uneval(cmd)) : 'goDoCommand("cmd_'+ cmd +'")');
    key.setAttribute('id', k +'_'+ name);
    key.setAttribute('label', name);
  }
}