Taberareloo 用パッチ： pplog Bone Zapper / 骨リモコン

userscript.pplog.bone.zapper.tbrl.js

// ==Taberareloo==
// {
//   "name"        : "pplog Bone Zapper"
// , "description" : "Zapping pplog back and forth"
// , "include"     : ["content"]
// , "match"       : ["https://www.pplog.net/", "https://www.pplog.net/u/*"]
// , "version"     : "0.2.0"
// , "downloadURL" : "https://gist.github.com/YungSang/8812722/raw/userscript.pplog.bone.zapper.tbrl.js"
// }
// ==/Taberareloo==

(function() {
  var zapping = [].concat($X("//a[@href='/zapping']")).shift();
  if (!zapping) {
    return;
  }

  var poems = localStorage.getItem('poems');
  poems = poems ? JSON.parse(poems) : [];
  var poem_index = parseInt(localStorage.getItem('poem_index') || '0', 10);

  var index = poems.indexOf(location.href);
  if (index === -1) {
    poems.push(location.href);
    poem_index = poems.length - 1;
    localStorage.setItem('poems', JSON.stringify(poems));
  }
  else {
    poem_index = index;
  }
  localStorage.setItem('poem_index', poem_index);

  document.addEventListener('keyup', function (ev) {
    if (ev.currentTarget !== document) {
      return;
    }

    if (ev.ctrlKey || ev.altKey || ev.shiftKey || ev.metaKey) {
      return;
    }

    var poem;
    switch (ev.keyCode) {
    case 37: // left
      poem = poems[poem_index - 1];
      if (poem) {
        localStorage.setItem('poem_index', poem_index - 1);
        zapping.classList.add('clicked');
        location.href = poem;
      }
      break;
    case 38: // up
      localStorage.removeItem('poem_index');
      localStorage.removeItem('poems');
      zapping.classList.add('clicked');
      location.href = 'https://www.pplog.net/';
      break;
    case 39: // right
      poem = poems[poem_index + 1];
      if (poem) {
        localStorage.setItem('poem_index', poem_index + 1);
        zapping.classList.add('clicked');
        location.href = poem;
      }
      else {
        localStorage.setItem('poem_index', poem_index + 1);
        zapping.classList.add('clicked');
        location.href = 'https://www.pplog.net/zapping';
      }
      break;
    }
  });
})();