/* NEW BSD LICENSE {{{
Copyright (c) 2011-2012, anekos.
Copyright (c) 2011, teramako.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation
       and/or other materials provided with the distribution.
    3. The names of the authors may not be used to endorse or promote products
       derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.


###################################################################################
# http://sourceforge.jp/projects/opensource/wiki/licenses%2Fnew_BSD_license       #
# に参考になる日本語訳がありますが、有効なのは上記英文となります。                #
###################################################################################

}}} */

// INFO {{{
let INFO = xml`
  <plugin name="GooglePlusCommando" version="2.4.7"
          href="http://github.com/vimpr/vimperator-plugins/blob/master/google-plus-commando.js"
          summary="The handy commands for Google+"
          lang="en-US"
          xmlns="http://vimperator.org/namespaces/liberator">
    <author email="anekos@snca.net">anekos</author>
    <author email="teramako@gmail.com" homepage="http://d.hatena.ne.jp/teramako/">teramako</author>
    <license>New BSD License</license>
    <project name="Vimperator" minVersion="3.0"/>
    <p>Many Mappings and  Post command for Google+</p>
    <p>require: feedSomeKeys_3.js and x-hint.js and _libly.js</p>
    <item>
      <tags>:googleplus-setup</tags>
      <spec>:googleplus -setup</spec>
      <spec>:gp -setup</spec>
      <description>
        <p>Should setup at first</p>
        <ol>
          <li>Login to <a href="htts://plus.google.com/">Google+</a></li>
          <li>Execute <ex>:googleplus -setup</ex></li>
        </ol>
      </description>
    </item>
    <item>
      <tags>:googleplus-nonargs</tags>
      <spec>:googleplus</spec>
      <spec>:gp</spec>
      <description>
        <p>when argument is none, select the Google+ tab or open in new tab</p>
      </description>
    </item>
    <item>
      <tags>:googleplus :gp</tags>
      <spec>:googleplus <oa>-l[link]</oa> <oa>-i[mage] <a>imageURL</a></oa> <oa>-t[o] <a>to</a></oa> <a>message</a></spec>
      <spec>:gp <oa>-l[ink]</oa> <oa>-i[mage] <a>imageURL</a></oa> <oa>-t[o]> <a>to</a></oa> <a>message</a></spec>
      <description>
        <p>Post <a>message</a></p>
        <dl>
          <dt>-link</dt>
          <dd>
            Add the current URL. If the selections are available, add the selections as relataed page.
            And when <a>-image</a> option is not specified and image elements is contained in the selections,
            add the URL of the largest image.
          </dd>
          <dt>-image</dt>
          <dd>
            Specify image URL
          </dd>
          <dt>-to</dt>
          <dd>
            Specify the circles. Can set multiple. (Default: Anyone)
          </dd>
        </dl>
      </description>
    </item>
    <item>
      <tags>g:gplus_commando_map_</tags>
      <spec>let g:gplus_commando_map_<a>command</a> = <a>map-keys</a></spec>
      <description>
        <p>
          Map <a>map-keys</a> for <a>command</a>.
          The possible <a>command</a>s.
          <dl>
            <dt>next</dt>           <dd>Go to next entry.</dd>
            <dt>prev</dt>           <dd>Back to previous entry.</dd>
            <dt>share</dt>          <dd>Shate current entry.</dd>
            <dt>plusone</dt>        <dd>+1</dd>
            <dt>comment</dt>        <dd>Comment to current entry.</dd>
            <dt>post</dt>           <dd>Post new entry.</dd>
            <dt>yank</dt>           <dd>Copy the permlink of current entry to clipboard.</dd>
            <dt>notification</dt>   <dd>Open notification box.</dd>
            <dt>cancel</dt>         <dd>Cancel current something.</dd>
            <dt>submit</dt>         <dd>Submit current editing post.</dd>
            <dt>unfold</dt>         <dd>Unfold something on current entry.</dd>
            <dt>menu</dt>           <dd>Open the menu of current entry.</dd>
            <dt>mute</dt>           <dd>Mute current entry.</dd>
            <dt>open</dt>           <dd>Open something on current entry.</dd>
          </dl>
        </p>
        <p>rc file example</p>
        <code>
let g:gplus_commando_map_next            = "j"
let g:gplus_commando_map_prev            = "k"
let g:gplus_commando_map_share           = "s"
let g:gplus_commando_map_plusone         = "p"
let g:gplus_commando_map_comment         = "c"
let g:gplus_commando_map_post            = "C"
let g:gplus_commando_map_yank            = "y"
let g:gplus_commando_map_notification    = "n"
let g:gplus_commando_map_submit          = "&lt;C-CR&gt;"
let g:gplus_commando_map_cancel          = "&lt;Esc&gt;"
let g:gplus_commando_map_unfold          = "e"
let g:gplus_commando_map_menu            = "m"
        </code>
      </description>
    </item>
  </plugin>
  <plugin name="GooglePlusCommando" version="2.4.7"
          href="http://github.com/vimpr/vimperator-plugins/blob/master/google-plus-commando.js"
          summary="The handy commands for Google+"
          lang="ja-JP"
          xmlns="http://vimperator.org/namespaces/liberator">
    <author email="anekos@snca.net">anekos</author>
    <author email="teramako@gmail.com" homepage="http://d.hatena.ne.jp/teramako/">teramako</author>
    <license>New BSD License</license>
    <project name="Vimperator" minVersion="3.0"/>
    <p>Many Mappings and  Post command for Google+</p>
    <p>require: feedSomeKeys_3.js and x-hint.js and _libly.js</p>
    <item>
      <tags>:googleplus-setup</tags>
      <spec>:googleplus -setup</spec>
      <spec>:gp -setup</spec>
      <description>
        <p>Should setup at first</p>
        <ol>
          <li>Login to <a href="htts://plus.google.com/">Google+</a></li>
          <li>Execute <ex>:googleplus -setup</ex></li>
        </ol>
      </description>
    </item>
    <item>
      <tags>:googleplus-nonargs</tags>
      <spec>:googleplus</spec>
      <spec>:gp</spec>
      <description>
        <p>when argument is none, select the Google+ tab or open in new tab</p>
      </description>
    </item>
    <item>
      <tags>:googleplus :gp</tags>
      <spec>:googleplus <oa>-l[link]</oa> <oa>-i[mage] <a>imageURL</a></oa> <oa>-t[o] <a>to</a></oa> <a>message</a></spec>
      <spec>:gp <oa>-l[ink]</oa> <oa>-i[mage] <a>imageURL</a></oa> <oa>-t[o]> <a>to</a></oa> <a>message</a></spec>
      <description>
        <p>Post <a>message</a></p>
        <dl>
          <dt>-link</dt>
          <dd>
            Add the current URL. If the selections are available, add the selections as relataed page.
            And when <a>-image</a> option is not specified and image elements is contained in the selections,
            add the URL of the largest image.
          </dd>
          <dt>-image</dt>
          <dd>
            Specify image URL
          </dd>
          <dt>-to</dt>
          <dd>
            Specify the circles. Can set multiple. (Default: Anyone)
          </dd>
        </dl>
      </description>
    </item>
    <item>
      <tags>g:gplus_commando_map_</tags>
      <spec>let g:gplus_commando_map_<a>command</a> = <a>map-keys</a></spec>
      <description>
        <p>
          <a>map-keys</a> に <a>command</a> をマップします。
          使える <a>command</a> は以下の通りです。
          <dl>
            <dt>next</dt>           <dd>次のエントリに移動</dd>
            <dt>prev</dt>           <dd>前のエントリに移動</dd>
            <dt>share</dt>          <dd>現在のエントリを共有</dd>
            <dt>plusone</dt>        <dd>+1</dd>
            <dt>comment</dt>        <dd>現在のエントリにコメントする</dd>
            <dt>post</dt>           <dd>新しく投稿(共有)する</dd>
            <dt>yank</dt>           <dd>現在のエントリの Permlink をクリップボードにコピーする</dd>
            <dt>notification</dt>   <dd>通知欄を開く</dd>
            <dt>cancel</dt>         <dd>編集中のフォームをキャンセルして閉じる</dd>
            <dt>submit</dt>         <dd>編集中のフォームから投稿する</dd>
            <dt>unfold</dt>         <dd>現在のエントリ内の折りたたみを解除する</dd>
            <dt>menu</dt>           <dd>現在のエントリのメニューを開く</dd>
            <dt>mute</dt>           <dd>現在のエントリをミュートする</dd>
            <dt>open</dt>           <dd>現在のエントリの画像やリンクなどを開く</dd>
          </dl>
        </p>
        <p>rc file example</p>
        <code>
let g:gplus_commando_map_next            = "j"
let g:gplus_commando_map_prev            = "k"
let g:gplus_commando_map_share           = "s"
let g:gplus_commando_map_plusone         = "p"
let g:gplus_commando_map_comment         = "c"
let g:gplus_commando_map_post            = "C"
let g:gplus_commando_map_yank            = "y"
let g:gplus_commando_map_notification    = "n"
let g:gplus_commando_map_submit          = "&lt;C-CR&gt;"
let g:gplus_commando_map_cancel          = "&lt;Esc&gt;"
let g:gplus_commando_map_unfold          = "e"
let g:gplus_commando_map_menu            = "m"
        </code>
      </description>
    </item>
  </plugin>
`;
// }}}

(function () {

  // Utils {{{

  function A (list)
    Array.slice(list);

  function I (list)
    Iterator(list);

  function IA (list)
    Iterator(A(list));

  function click (elem, after) {
    click
    if (!elem)
      throw GPCError('elem is undefined');
    setTimeout(
      function () {
        buffer.followLink(elem, liberator.CURRENT_TAB);
        setTimeout(after, 1);
      },
      1
    );
  }

  function clicks (elems, after) {
    if (!(elems && elems.length))
      return;

    setTimeout(
      function () {
        click(elems[0], elems.length === 1 && after);
        clicks(elems.slice(1));
      },
      1
    );
  }

  function isDisplayed (elem)
    (elem && !/none/.test(util.computedStyle(elem).display));

  function withCount (command) {
    return function (count) {
      if (count < 1)
        count = 1;
      for (let i = 0; i < count; i++)
        command();
    };
  }

  function GPCError (msg) {
    if (this instanceof GPCError) {
      liberator.log('GPCError: ' + msg);
      this.toString = function () String(msg);
    } else {
      return new GPCError(msg);
    }
  }

  function selectFind (doc, selector, func) {
    if (!doc)
      return;
    if (!func)
      func = function () true;
    for (let [n, v] in IA(doc.querySelectorAll(selector))) {
      let res = func(v, n);
      if (res)
        return v;
    }
  }

  function getSelector (elem) {
    if (!elem)
      return;
    let cs = elem.getAttribute('class').trim().split(/\s+/);
    cs.sort(function (a, b) a.localeCompare(b));
    return '.' + cs.join('.');
  }

  function getSelectorFind (doc, sel, func) {
    return getSelector(selectFind(doc, sel, func));
  }

  // }}}

  // Selector {{{

  const [S, X, R] = (function () {

    function role (name, prefix)
      ((prefix || '') + '[role="' + name + '"]');

    function once (obj, name, fail) {
      let func = obj[name];
      Object.defineProperty(
        obj,
        name,
        {
          get: let (result) function () (result || (result = func()) || fail)
        }
      );
    }

    function onceAll (obj, fail) {
      for (let [n, v] in I(obj)) {
        if (n === 'role')
          continue;
        if (typeof v === 'function')
          once(obj, n, fail);
        if (typeof v === 'object') {
          onceAll(v, fail);
        }
      }
    }

    let cssRules = {
      __iterator__: function (nameOnly) {
        if (content.location.host != 'plus.google.com')
          return;

        let result = [];
        for (let [, sheet] in IA(content.document.styleSheets)) {
          for (let [n, rule] in IA(sheet.cssRules)) {
            yield nameOnly ? n : [n, rule];
          }
        }
      },

      find: function (re, notre) {
        let result = [];
        for (let [, rule] in I(this)) {
          if (re.test(rule.cssText)) {
            if (notre && notre.test(rule.cssText))
              continue;
            result.push(rule);
          }
        }

        if (result.length < 1)
          throw GPCError('Not fount css rule: ' + re);

        if (result.length == 1)
          return result[0].selectorText;

        for (let [, rule] in I(result)) {
          liberator.log(rule.cssText);
        }

        throw GPCError('Two and more rules are found');
      },

      finder: function (re, notre) {
        let self = this;
        return function () self.find(re, notre);
      },

      get: function (klass, returnCssText) {
        let reKlass = new RegExp('(^|,)\s*.' + klass + '\s*(,|$)');
        let result = [];
        for (let [, rule] in I(this)) {
          if (reKlass.test(rule.selectorText))
            result.push(rule);
        }
        if (returnCssText) {
          return result.map(function (it) it.cssText);
        } else {
          return result;
        }
      }
    };

    let selector = {
      role: role,
      typePlusone: '[g\\:entity^="buzz:"]',
      editable: '.editable',

      plusone: 'button[id^="po-"]',

      currentEntry: {
        root: cssRules.finder(/border-left: 1px solid rgb\(77, 144, 240\);\s*\}/),
        unfold: {
          comment: cssRules.finder(/url\("\/\/ssl\.gstatic\.com\/s2\/oz\/images\/stream\/expand\.png"\);\s*background-repeat/),
          content: function () {
            /*
             * FIXME UghhhhhHHhaaa
            let content = cssRules.find(/\{ overflow: hidden; padding-bottom: \d+px; padding-top: \d+px; text-overflow: ellipsis ellipsis; \}/);
            let buttons = cssRules.find(/^[^,]+\,[^,]+\{\s*color:\s*rgb\(51, 102, 204\);\s*cursor:\s*pointer;\s*\}$/);
            return buttons.split(/,/).map(function (b) (content + ' > div > ' +  b)).join(', ');
            */
            return '.SS0Hfe';
          }
        },
        menu: {
          mute: '----'
        },
        menuButton: cssRules.finder(/url\("\/\/ssl\.gstatic\.com\/s2\/oz\/images\/stream\/options_default\.png"\).*pointer.*13.*margin-right: -44/, /\.\w{3,}\s\{/),
        cancel: role('button', '[id$=".cancel"]'),
        submit: role('button', '[id$=".post"]'),
      },
      post: {
        root: function () {
          let div = cssRules.find(/\{ margin-left: \d+px; margin-right: \d+px; margin-top: \d+px; width: \d+px; \}/);
          return '#contentPane ' + 'div[decorated="true"]' + div;
          // onclick の this.className += ' f-Sa' は初めは存在しないっぽい
        },
        open: cssRules.finder(/opacity 0.125s ease 0.125s/),
        cancel: 'div[id$=".c"]',   // :6w.c
      },
      notification: '#gbi1',
      viewer: {
        root: function () {
          let n = Elements.doc.querySelector(S.viewer.next);
          return n && getSelector(n.parentNode.parentNode);
        },
        prev: cssRules.finder(/url\("\/\/ssl\.gstatic\.com\/s2\/oz\/images\/left-arrow2\.png"\)/),
        next: cssRules.finder(/url\("\/\/ssl\.gstatic\.com\/s2\/oz\/images\/right-arrow2\.png"\)/)
      },
      dialog: {
        root: role('dialog', 'body > '),
        //cssRules.find(/0pt 4px 16px rgba\(0, 0, 0, 0.2\).*-moz-border-right-color.*z-index: 1101/));
        submit: 'td[valign="top"] > div[role="button"]:nth-child(1)',
        cancel: 'td[valign="top"] > div[role="button"]:nth-child(2)'
      },
      frames: {
        notifications: {
          root: 'iframe[src*="/_/notifications/"]',
          summary: {
            root: '#summary-view',
            prev: '#summary-view + div > div > div > span',
            next: '#summary-view + div > div > div > span:last-child',
            back: '#summary-view + div > div > span',
          },
          entry: {
            entries: 'div[id^=":"][style*="max-height"]',   // :2.diz13l....
            comment: cssRules.finder(/rgb\(221, 221, 221\).*rgb\(153, 153, 153\)/),
            mute: 'div[id^=":"][style*="max-height"] > div > div:nth-child(2) > div > div > ' + role('button', 'span') // FIXME
          },
        }
      },
      closeButton: cssRules.finder(/url\("\/\/ssl\.gstatic\.com\/s2\/oz\/images\/lightbox-sprite2.gif"\).*0%.*0%.*z-index/)
    };

    let xpath = {
      hints: [
        'span[@role="button"]',
        'div[@role="button"]',
        'div[@data-content-type]',
        'img[contains(@class,"O-g-Sd-la")]',  // /photos の写真
        //FIXME 'div[contains(@class,"a-z-nb-A")]'
      ]
    };

    onceAll(selector, '.MEOW_MEOW_MEOW');

    return [selector, xpath, cssRules];
  })();

  // }}}

  // Elements {{{

  const Elements = (function () {

    return {
      get doc() content.document,
      get currentEntry () MakeElement(Entry, Elements.doc.querySelector(S.currentEntry.root)),
      post: {
        get root () Elements.doc.querySelector(S.post.root),
        get cancel () Elements.doc.querySelector(S.post.cancel),
        get open () Elements.doc.querySelector(S.post.open)
      },
      get notification () Elements.doc.querySelector(S.notification),
      get viewer () MakeElement(Viewer, Elements.doc.querySelector(S.viewer.root)),
      get dialog () MakeElement(Dialog, Elements.doc.querySelector(S.dialog.root)),

      frames: {
        get notifications () MakeElement(Notifications, Elements.doc.querySelector(S.frames.notifications.root))
      },

      get focusedEditor () {
        function hasIFrame (elem) {
          let iframe = elem.querySelector('iframe');
          return iframe && iframe.contentWindow === win;
        }

        // エントリにコメント
        function get1 (root) {
          function button (editor, name)
            editor.parentNode.querySelector(S.role('button', `[id$=".{name}"]`));

          if (!root)
            return;

          let editors = A(root.querySelectorAll('div[id$=".editor"]')).filter(hasIFrame);
          if (editors.length === 0)
            return;
          if (editors.length > 1)
            throw 'Two and more editors were found.';

          let peditor = editors[0];
          return {
            editor: peditor,
            button: {
              submit: button(peditor, 'post'),
              cancel: button(peditor, 'cancel')
            }
          };
        }

        // 新しく投稿
        function get2 () {
          function button (editor, index) {
            let result = editor.querySelectorAll('td > ' + S.role('button'))[index];
            if (result)
              return result;
            if (index === 1)
              return editor.querySelector(S.post.cancel);
          }

          const indexes = {submit: 0, cancel: 1};

          let editors = A(doc.querySelectorAll(S.post.root)).filter(hasIFrame);
          if (editors.length === 0)
            return;
          if (editors.length > 1)
            throw 'Two and more editors were found.';

          let peditor = editors[0];
          return {
            editor: peditor,
            button: {
              submit: button(peditor, 0),
              cancel: button(peditor, 1)
            }
          };
        }

        // ダイアログ
        function get3 (root) {
          function button (editor, name)
            editor.parentNode.querySelector(S.role('button', `[id$=".{name}"]`));

          if (!root)
            return;

          let editors = A(root.querySelectorAll('div.editable')).filter(hasIFrame);
          if (editors.length === 0)
            return;
          if (editors.length > 1)
            throw 'Two and more editors were found.';

          return {
            editor: editors[0],
            button: {
              submit: root.querySelector(S.dialog.submit),
              cancel: root.querySelector(S.dialog.cancel),
            }
          };
        }

        let doc = content.document;
        let win = document.commandDispatcher.focusedWindow;

        return (
          get1(doc) ||
          get2() ||
          get1(Elements.frames.notifications.root.contentDocument) ||
          (Elements.dialog && Elements.dialog.root && get3(Elements.dialog.root))
        );
      },

      /**
       * ノードをHTMLテキストに変換
       * @param {Node} aNode
       * @param {String} [aParentTag] 親ノードのタグ名
       * @param {String} [aIndent]    インデント文字列
       * @param {Number} [aIndex]     ノード番号(ol>li 時のみ使用)
       * @return {String}
       */
      node2txt: function (aNode, aParentTag, aIndent, aIndex) {
        var txt = "";
        switch (aNode.nodeType) {
        case Node.DOCUMENT_NODE: // 9
        case Node.DOCUMENT_FRAGMENT_NODE: // 11
          switch (aParentTag) {
          case "ol":
          case "ul":
          case "dl":
            aIndent = "&nbsp;&nbsp;";
            break;
          default:
            aIndent = "";
          }
          txt = nodelist2txt(aNode.childNodes, aParentTag, aIndent).join("");
          break;
        case Node.TEXT_NODE: // 3
          txt = aNode.nodeValue.replace(/\s+/g, " ");
          break;
        case Node.ELEMENT_NODE: // 1
          let localName = aNode.localName,
              children = aNode.childNodes;
          switch (localName) {
          case "ul":
          case "ol":
          case "dl":
            txt = "<br/>\n" + nodelist2txt(children, localName, aIndent + "&nbsp;&nbsp;").join("") + "<br/>\n";
            break;
          case "li":
            txt = aIndent + (aParentTag == "ol" ? ("  " + (aIndex+1)).slice(-2) + ". " : " * ").replace(" ", "&nbsp;", "g") +
                  nodelist2txt(children, "li", aIndent).join("") +
                  "<br/>\n";
            break;
          case "dt":
            txt = aIndent + "<b>" + nodelist2txt(children, localName, aIndent) + "</b>:<br/>\n";
            break;
          case "dd":
            txt = aIndent + "&nbsp;&nbsp;" + nodelist2txt(children, localName, aIndent) + "<br/>\n";
            break;
          case "br":
            txt = "<br/>\n";
            break;
          case "img":
            txt = "<img src=" + JSON.stringify(aNode.src) + " width=\"" + aNode.width + "\" height=\"" + aNode.height + "\"/>";
            break;
          case "p":
            txt = nodelist2txt(children, "p", "").join("") + "<br/>\n";
            break;
          case "a":
            if (aNode.hasAttribute("href") && aNode.href.indexOf("http") == 0) {
              txt = "<a href=" + JSON.stringify(aNode.href) + (aNode.title ? " title=" + JSON.stringify(aNode.title) : "") + ">" +
                    nodelist2txt(children, "a", "").join("") +
                    "</a>";
              break;
            }
          default:
            txt = '<' + localName + '>' +
                  nodelist2txt(children, localName, aIndent).join("") +
                  '</' + localName + '>';
          }
          break;
        }
        return txt;
      },
    };

    function MakeElement (constructor, root) {
      if (root && isDisplayed(root))
        return constructor(root);
    }

    function Entry (root) {
      let self = {
        get root () root,
        get permlink () [
          e
          for ([, e] in Iterator(A(root.querySelectorAll('a'))))
          if (!e.getAttribute('oid'))
        ][0],
        unfold: {
          get comment () root.querySelector(S.currentEntry.unfold.comment),
          get content () root.querySelector(S.currentEntry.unfold.content)
        },
        get buttons () A(self.plusone.parentNode.querySelectorAll(S.role('button'))),
        get commentButton () self.buttons[0],
        get commentEditor () let (e = root.querySelector(S.editable)) (e && e.parentNode),
        get comment() (self.commentEditor || self.commentButton),
        get plusone () root.querySelector(S.typePlusone),
        get share () self.buttons[2],
        menu: {
          // FIXME この三つは、一度メニューを出さないと、現われないかもしれない
          get root () root.querySelector(S.role('menu')),
          get items () A(self.menu.root.querySelectorAll(S.role('menuitem'))),
          get mute () self.menu.items.slice(-2)[0]
        },
        get menuButton () root.querySelector(S.currentEntry.menuButton),
        get cancel () root.querySelector(S.currentEntry.cancel),
        get submit () root.querySelector(S.currentEntry.submit)
      };
      return self;
    }

    function Dialog (root) {
      function nButton (n) {
        let bs = self.buttons;
        if (bs.length === 2)
          return bs[n];
      }
      let self = {
        get root () root,
        get buttons () A(root.querySelectorAll(S.role('button'))),
        get submit () nButton(0),
        get cancel () nButton(1)
      };
      return self;
    }

    function Viewer (root) {
      let self = {
        get cancel () root.querySelector(S.closeButton),
        get prev () root.querySelector(S.viewer.prev),
        get next () root.querySelector(S.viewer.next)
      };
      return self;
    }

    function Notifications (root) {
      let self = {
        get root () root,
        get visible () {
          let h = parseInt(root.style.height, 10) > 0;
          if (!h)
            return false;
          let nwc =  plugins.googlePlusCommando.element.frames.notifications.root.contentDocument.querySelector('#nw-content');
          return parseInt(util.computedStyle(nwc).height, 10) > 100;
        },
        summary: {
          get root () root.contentDocument.querySelector(S.frames.notifications.summary.root),
          get visible () isDisplayed(self.summary.root),
        },
        entry: {
          get root () self.summary.root.nextSibling,
          get entries () A(root.contentDocument.querySelectorAll(S.frames.notifications.entry.entries)),
          get current () self.entry.entries.filter(isDisplayed)[0],
          get visible () isDisplayed(self.entry.root),
          get prev () root.contentDocument.querySelector(S.frames.notifications.summary.prev),
          get next () root.contentDocument.querySelector(S.frames.notifications.summary.next),
          get back () root.contentDocument.querySelector(S.frames.notifications.summary.back),
          get comment () self.entry.current.querySelector(S.frames.notifications.entry.comment),
          get mute () self.entry.current.querySelector(S.frames.notifications.entry.mute),
          get unfold () root.contentDocument.querySelector(S.currentEntry.unfold.comment)
        }
      };
      return self;
    }

    /**
     * NodeListの子をテキストにして配列で返す
     * @param {NodeList} aChildNoes
     * @param {String} aParentTag
     * @param {String} aIndent
     * @return {String[]}
     */
    function nodelist2txt (aChildNodes, aParentTag, aIndent) {
      var a = [], index = 0;
      for (let i = 0, len = aChildNodes.length, child; child = aChildNodes[i]; ++i) {
        let txt = Elements.node2txt(child, aParentTag, aIndent, index);
        if (txt) {
          a.push(txt);
          ++index;
        }
      }
      return a;
    }

    return Elements;
  })();

  // }}}

  // Post Help {{{

  const PostHelp = {
    PanelID: 'google-plus-commando-help-panel',

    get panel () Elements.doc.querySelector('#' + PostHelp.PanelID),

    show: function () {
      function move (panel) {
        let contentHeight = document.getElementById('content').boxObject.height;
        let rect = Elements.focusedEditor.editor.getClientRects()[0];
        if (rect.top < (contentHeight / 2)) {
          panel.style.top = '';
          panel.style.bottom = '10px';
        } else {
          panel.style.top = '10px';
          panel.style.bottom = '';
        }
      }

      let doc = Elements.doc;
      let parent = doc.body;

      let exists = PostHelp.panel;
      if (exists) {
        move(exists);
        exists.style.display = 'block';
        return;
      }

      let panel  = doc.createElement('div');
      panel.setAttribute('id', PostHelp.PanelID);
      let (ps = panel.style) {
        ps.position = 'fixed';
        ps.left = '10px';
        ps.zIndex = 1000;
        ps.backgroundColor = 'white';
        ps.border = 'solid 1px grey';
      }
      panel.innerHTML = `
        <table>
          <tr><th>入力</th>           <th>効果</th>                   <th>解説</th>                                 </tr>
          <tr><td>*TEXT*</td>         <td><b>TEXT</b></td>            <td>太字</td>                                 </tr>
          <tr><td>_TEXT_</td>         <td><i>TEXT</i></td>            <td>斜体</td>                                 </tr>
          <tr><td>-TEXT-</td>         <td><s>TEXT</s></td>            <td>打ち消し線</td>                           </tr>
          <tr><td>*-TEXT-*</td>       <td><b><s>TEXT</s></b></td>     <td>太字/打消。打消(-)は内側に書く</td>       </tr>
          <tr><td>-ねこ-</td>         <td>☓</td>                      <td>日本語の打消はダメ</td>                   </tr>
          <tr><td>-ね こ-</td>        <td><s>ね こ</s></td>           <td>英数字や半角スペースを入れたらOK</td>     </tr>
          <tr><td>-Aねこす-</td>      <td><s>Aねこす</s></td>         <td>英数字を前後に入れても良い</td>           </tr>
        </table>
      `;

      move(panel);
      parent.appendChild(panel);

      return;
    },

    hide: function () {
      let exists = PostHelp.panel;
      if (exists)
        exists.style.display = 'none';
    }
  };

  // }}}

  // Commands {{{

  const Commands = {
    moveEntry: function (next) {
      let [arrow, vim, dir] = next ? ['<Down>', 'j', 'next'] : ['<Up>', 'k', 'prev'];

      if (Elements.viewer)
        return click(Elements.viewer[dir]);

      let notifications = Elements.frames.notifications;

      if (notifications && notifications.visible && notifications.entry.visible)
        return click(Elements.frames.notifications.entry[dir]);

      let arrowTarget = (function () {
        if (notifications && notifications.visible)
          return notifications.root.contentDocument.body;

        let menus = A(Elements.doc.querySelectorAll(S.role('menu', '[tabindex="0"]')));
        if (menus.length === 1)
          return menus[0];
      })();

      plugins.feedSomeKeys_3.API.feed.apply(
        null,
        arrowTarget ? [arrow, ['keypress'], arrowTarget] : [vim, ['vkeypress'], Elements.doc]
      );
    },
    next: withCount(function () Commands.moveEntry(true)),
    prev: withCount(function () Commands.moveEntry(false)),
    comment: function () {
      let after = PostHelp.show;
      let notifications = Elements.frames.notifications;
      if (notifications && notifications.visible && notifications.entry.visible) {
        let e = notifications.entry.current;
        e.scrollTop = e.scrollHeight;
        click(notifications.entry.comment, after);
      } else {
        let entry = Elements.currentEntry;
        click(entry.comment, after);
      }
    },
    plusone: function () click(Elements.currentEntry.plusone),
    share: function () click(Elements.currentEntry.share),
    post: function () {
      buffer.scrollTop();
      click(Elements.post.open, PostHelp.show);
    },
    yank: function () {
      let e = Elements.currentEntry.permlink;
      if (!e)
        liberator.echoerr('Not found permlink');
      util.copyToClipboard(e.href);
      liberator.echo('Copy the permlink to clipboard: ' + e.href);
    },
    notification: function () {
      click(Elements.notification);
    },
    cancel: function () {
      let notifications = Elements.frames.notifications;
      if (notifications && notifications.visible && notifications.entry.visible)
        return click(notifications.entry.back);

      for (let [, n] in Iterator(['dialog', 'viewer'])) {
        let e = Elements[n];
        if (e && e.cancel)
          return click(e.cancel);
      }

      if (Elements.frames.notifications.visible)
        return click(Elements.notification);

      click(Elements.doc.body);
    },
    submit: function () {
      if (liberator.focus)
        return;
      PostHelp.hide();
      click(Elements.focusedEditor.button.submit);
    },
    unfold: function () {
      let notifications = Elements.frames.notifications;
      if (notifications && notifications.visible && notifications.entry.visible)
        return click(notifications.entry.unfold);

      click(Elements.currentEntry.unfold.comment);
      click(Elements.currentEntry.unfold.content);
    },
    menu: function () {
      click(Elements.currentEntry.menuButton);
    },
    mute: function () {
      let notifications = Elements.frames.notifications;
      if (notifications && notifications.visible && notifications.entry.visible)
        return click(notifications.entry.mute);
      click(Elements.currentEntry.menu.mute);
    },
    open: function () {
      function clicks (links) {
        if (links.length < 1)
          throw GPCError('No link.');

        if (links.length === 1)
          return click(links[0]);

        let t = {};
        A(links).forEach(function (link) (t[link.textContent] = link));

        commandline.input(
          'Select a link',
          function (url) {
            let link = t[url];
            if (link) {
              click(link);
            } else {
              liberator.open(url, liberator.NEW_TAB);
            }
          },
          {
            completer: function (context) {
              context.completions = [
                [link.href, link.textContent]
                for ([, link] in IA(links))
              ];
            }
          }
        );
      }

      let ce = Elements.currentEntry;
      if (!ce)
        return;

      let dct = ce.root.querySelector('div[data-content-type]');
      if (dct) {
        if (!/application\/x-shockwave-flash/.test(dct.getAttribute('data-content-type')))
          return click(dct);

        let links = dct.parentNode.querySelectorAll('a');
          return clicks(links);
      }

      let links = ce.root.querySelectorAll('a.ot-anchor');
      clicks(links);
    }
  };

  // }}}

  // Define mappiings {{{

  (function () {

    const MatchingUrls = RegExp('^https://plus\\.google\\.com/*');
    const MappingDescriptionSuffix = ' - Google plus Commando';

    function defineMapping (mode, cmd) {
      let gv =
        liberator.globalVariables[
          'gplus_commando_map_' +
          cmd.replace(/[A-Z]/g, function (m) ('_' + m.toLowerCase()))
        ];
      if (!gv)
        return;
      let func = Commands[cmd];
      mappings.addUserMap(
        [mode],
        gv.split(/\s+/),
        cmd + MappingDescriptionSuffix,
        function (count) {
          try {
            func(count);
          } catch (e if (e instanceof GPCError)) {
            /* DO NOTHING */
          } catch (e) {
            liberator.log(e);
            liberator.log(e.stack);
            throw e;
          }
        },
        {
          count: func.length === 1,
          matchingUrls: MatchingUrls
        }
      );
    }

    'comment plusone share next prev post yank notification cancel unfold menu mute open'.split(/\s/).forEach(defineMapping.bind(null, modes.NORMAL));
    'submit'.split(/\s/).forEach(defineMapping.bind(null, modes.INSERT));

    mappings.addUserMap(
      [modes.INSERT],
      ['<Esc>'],
      'Escape from input area',
      function () {
        if (liberator.focus) {
          let esc = mappings.getDefault(modes.NORMAL, '<Esc>');
          esc.action.apply(esc, arguments);
        } else {
          click(Elements.focusedEditor.button.cancel);
          // FIXME
          window.document.commandDispatcher.advanceFocus();
          modes.reset();
          PostHelp.hide();
        }
      },
      {
        matchingUrls: MatchingUrls
      }
    );

  })();

  // }}}

  // Define hints {{{

  (function () {

    const HintStyleName = 'google-plus-commando-hint';

    function s2x (s)
      s.replace(/^\./, '');

    [
      ['o', 'f', function (e) click(e)],
      ['t', 'F', function (e) buffer.followLink(e, liberator.NEW_TAB)],
    ].forEach(function ([modeChar, mapKey, action]) {
      let modeName = 'google-plus-comando-hint-' + modeChar;

      hints.addMode(
        modeName,
        hints._hintModes[modeChar].prompt,
        function (elem, count) {
          function mouseEvent (name) {
            let evt = elem.ownerDocument.createEvent('MouseEvents');
            evt.initMouseEvent(name, true, true, elem.ownerDocument.defaultView, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
            elem.dispatchEvent(evt);
          }

          let plusone = (elem.getAttribute('g:entity') || '').indexOf('buzz:') === 0;
          if (plusone)
            mouseEvent('mouseover');
          action(elem, count);
          if (plusone)
            mouseEvent('mouseout');
        },
        function () {
          function removeRoot (s)
            s.replace(/^\s*\/\//, '');

          const roots = [
            {get visible () !!Elements.viewer, selector: ('div[contains(@class, "' + s2x(S.viewer.root) + '")]')},
            {get visible () !!Elements.dialog, selector: ('div[contains(@class, "' + s2x(S.dialog.root) + '")]')},
            {get visible () !!Elements.frames.notifications.visible, selector: 'id("nw-content")'}
          ];

          let xpath = options['hinttags'].split(/\s*\|\s*/).map(removeRoot).concat(X.hints);

          for (let [, root] in Iterator(roots)) {
            if (!root.visible)
              continue;
            xpath.push(String(`div[contains(@class, "{s2x(S.closeButton)}")]`));
            xpath = xpath.map(function (it) (root.selector + '//' + it));
            break;
          }

          styles.addSheet(false, HintStyleName, 'plus\\.google\\.com', S.plusone + '{ display: inline  !important }');

          return xpath.map(function (it) (/^id\(/.test(it) ? it : '//' + it)).join(' | ');
        }
      );

      mappings.addUserMap(
        [modes.NORMAL],
        [liberator.globalVariables['gplus_commando_map_hint_' + modeChar] || mapKey],
        'Hit a hint - Google plus Commando',
        function () hints.show(modeName),
        {
          matchingUrls: RegExp('^https://plus\\.google\\.com/.*')
        }
      );
    });

    plugins.libly.$U.around(
      hints,
      'hide',
      function (next) {
        setTimeout(function () styles.removeSheet(false, HintStyleName, 'plus\\.google\\.com'), 0);
        return next();
      },
      true
    );

    hints.addMode(
      'G',
      'Google+ Post',
      function action (elm) {
        var src = elm.src;
        commandline.open('', 'googleplus -i ' + src + ' ', modes.EX);
      },
      function getPath () util.makeXPath(['img'])
    );

  })();

  // }}}

  // Define Google+ post command {{{

  (function () {

    let HOME_URL = 'https://plus.google.com/',
        POST_URL_BASE = 'https://plus.google.com/u/0/_/sharebox/post/';

    /**
     * ${RUNTIMEPATH}/info/{profileName}/googlePlus のデータ取得/保存
     * @type {Object}
     */
    let store = storage.newMap('googlePlus', {store: true});

    commands.addUserCommand(
      ['gp', 'googleplus'],
      'Google+',
      function (args) {
        // ----------------------
        // -setup オプション
        // ----------------------
        if ('-setup' in args) {
          setupGooglePlus();
          return;
        }

        let message = args[0] || '',
            acls = null;

        // ----------------------
        // -link オプション
        // ----------------------
        let win = null;
        if ('-link' in args) {
          win = content;
        }
        // ----------------------
        // -imageURL オプション
        // ----------------------
        let image = null;
        if ('-imageURL' in args) {
          image = args['-imageURL'];
        }

        // ----------------------
        // -to オプション
        // ----------------------
        if ('-to' in args && args['-to'].indexOf('anyone') == -1)
          acls = [acl for ([,acl] in Iterator(store.get('CIRCLES', []))) if (args['-to'].indexOf(acl[0]) != -1)];

        // 引数が何も無い場合は、Google+のページへ
        if (!message && !win && !image) {
          let tab = getGooglePlusTab();
          if (tab)
            gBrowser.mTabContainer.selectedItem = tab;
          else
            liberator.open(HOME_URL, {where: liberator.NEW_TAB});

          return;
        }

        window.setTimeout(function () {
          let pd = new PostData(message, win, image, acls);
          postGooglePlus(pd, true);
        }, 0);
      }, {
        literal: 0,
        options: [
          [['-link', '-l'], commands.OPTION_NOARG],
          [['-imageURL', '-i'], commands.OPTION_STRING],
          [['-to', '-t'], commands.OPTION_LIST, null,
            function (context, args) {
              let [, prefix] = context.filter.match(/^(.*,)[^,]*$/) || [];
              if (prefix)
                context.advance(prefix.length);

              return [['anyone', 'to public']].concat([v for ([, v] in Iterator(store.get('CIRCLES', [])))]);
            }],
          [['-setup'], commands.OPTION_NOARG],
        ],
    },true);

    /**
     * Google+のページから必要データを保存する
     * @param {function} onComplete
     * @return {Boolean}
     */
    function setupGooglePlus (onComplete) {
      function onSuccess () {
        if (onComplete)
          onComplete();
        liberator.echomsg('Initialized: googleplus');
      }

      function onFail () {
        liberator.echoerr('Faild: initialize googleplus');
      }

      function getFromWindow (win) {
        let data = win.OZ_initData;
        if (!data)
          return false;
        // XXX 全てのデータが揃っていないケースがあるようなので、検査する
        try {
          store.set('UID', data[2][0]);
          store.set('AT', data[1][15]);
          let circles = data[12][0];
          // CIRCLES[]: [[Name, Description, ID], ...]
          store.set('CIRCLES', [
            ['circles', 'Everyone in your circles', '1c'],
            ['excircles', 'Everyone in your circles, plus all the people in their circles', '1f'],
          ].concat([[c[1][0],c[1][2],c[0][0]] for each(c in circles.slice(0, circles.length / 2))]));
          onSuccess();
          return true;
        } catch (e) {
          liberator.log(e);
          return false;
        }
      }

      // XXX ブラチラ大作戦
      function getFromMakedBrowser () {
        let browser = document.createElementNS(XUL, 'browser');
        browser.setAttribute('type', 'content');
        browser.setAttribute('src', 'https://plus.google.com/');
        document.getElementById('main-window').appendChild(browser);

        browser.addEventListener(
          'DOMContentLoaded',
          function (e) {
            if (e.target !== browser.contentWindow.document)
              return;
            browser.removeEventListener('DOMContentLoaded', arguments.callee, false);
            getFromWindow(browser.contentWindow.wrappedJSObject);
            browser.parentNode.removeChild(browser);
          },
          false
        );
      }

      let found = false;

      let tab = getGooglePlusTab();
      if (tab)
        found = getFromWindow(tab.linkedBrowser.contentWindow.wrappedJSObject);

      if (!found)
        getFromMakedBrowser();
    }

    /**
     * Google+のタブを取ってくる
     * @return {Element|null}
     */
    function getGooglePlusTab () {
      let tabs = gBrowser.tabs;
      for (let i = 0, tab; tab = tabs[i]; ++i) {
        if (tab.linkedBrowser.currentURI.spec.indexOf(HOME_URL) == 0) {
          return tab;
        }
      }
      return null;
    }

    /**
     * Post to Google+
     * @param {PostData} aPostData
     * @param {boolean} resetup
     */
    function postGooglePlus (aPostData, aRetry) {
      let data = aPostData.getPostData();
      let queries = [];
      for (let key in data)
        queries.push(key + '=' + encodeURIComponent(data[key]));

      let xhr = new XMLHttpRequest();
      xhr.mozBackgroundRequest = true;
      xhr.open('POST', aPostData.POST_URL, true);
      xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded;charset=UTF-8');
      xhr.setRequestHeader('Origin', HOME_URL);

      xhr.onreadystatechange = function (aEvent) {
        let xhr = aEvent.target,
            msg = 'Google+: ',
            XBW = window.XULBrowserWindow;
        if (xhr.readyState == 4) {
          let ok = xhr.status == 200;
          msg += ok ? 'Posted' : 'Post failed (' + xhr.statusText + ')';
          if (!ok && aRetry) {
            msg += ' ... Retry';
            setupGooglePlus(postGooglePlus.bind(null, aPostData, false));
          }
          window.setTimeout(function (XBW, msg) {
            if (XBW.jsDefaultStatus.indexOf('Google+:') == 0)
              XBW.setJSDefaultStatus('');
          }, 2000, XBW, msg);
        } else {
          msg += 'sending...';
        }
        liberator.log(msg, 0);
        XBW.setJSDefaultStatus(msg);
      };

      xhr.send(queries.join('&'));
    }

    XPCOMUtils.defineLazyServiceGetter(__context__, 'MIME', '@mozilla.org/mime;1', 'nsIMIMEService');

    /**
     * Google+への送信データ生成
     * @Constructor
     * @param {String}    aMessage
     * @param {Window}    [aWindow]   現ページのWindowオブジェクト
     * @param {String}    [aImageURL] 表示させたい画像URL
     * @param {Array}     [aACLs]     ACL[]
     */
    function PostData () { this.init.apply(this, arguments); }
    PostData.sequence = 0;
    PostData.prototype = {
      init: function PD_init (aMessage, aWindow, aImageURL, aACLs) {
        this.message = aMessage;
        this.window = aWindow;
        this.imageURL = aImageURL;

        this.UID = store.get('UID', null);
        liberator.assert(this.UID, 'Google+ Error: UID is not set. Please login and `:googleplus -setup\'');
        this.AT = store.get('AT', null);
        liberator.assert(this.AT, 'Google+ Error: AT is not set. Please login and `:googleplus -setup\'');

        this.setACLEnties(aACLs);
      },
      get token () {
        let t = 'oz:' + this.UID + '.' + this.date.getTime().toString(16) + '.' + this.sequence.toString(16);
        Object.defineProperty(this, 'token', {value: t});
        return t;
      },
      get date () {
        let d = new Date;
        Object.defineProperty(this, 'date', {value: d});
        return d;
      },
      get sequence () {
        let s = PostData.sequence++;
        Object.defineProperty(this, 'sequence', {value: s});
        return s;
      },
      get reqid () {
        let r = this.date.getHours() + 3600 + this.date.getMinutes() + 60 + this.date.getSeconds() + this.sequence * 100000;
        Object.defineProperty(this, 'reqid', {value: r});
        return r;
      },
      get POST_URL () {
        let url = POST_URL_BASE + '?_reqid=' + this.reqid + '&rt=j';
        Object.defineProperty(this, 'POST_URL', {value: url});
        return url
      },
      aclEntries: [{
        scope: {
          scopeType: 'anyone',
          name: 'Anyone',
          id: 'anyone',
          me: true,
          requiresKey: false
        },
        role: 20,
      }, {
        scope: {
          scopeType: 'anyone',
          name: 'Anyone',
          id: 'anyone',
          me: true,
          requiresKey: false,
        },
        role: 60
      }],
      setACLEnties: function PD_setACLEnties (aACLs) {
        if (!aACLs || aACLs.length == 0)
          return this.aclEntries = Object.getPrototypeOf(this).aclEntries;

        let entries = [];
        for (let i = 0, len = aACLs.length; i < len; ++i) {
          let acl = aACLs[i];
          let scope = {
            scopeType: 'focusGroup',
            name: acl[0],
            id: this.UID + '.' + acl[2],
            me: false,
            requiresKey: false,
            groupType: 'p'
          };
          entries.push({scope: scope, role: 60});
          entries.push({scope: scope, role: 20});
        }
        return this.aclEntries = entries;
      },
      getPostData: function PD_getPostData () {
        let spar = [v for each(v in this.generateSpar())];
        return {
          spar: JSON.stringify(spar),
          at  : this.AT
        };
      },
      generateSpar: function PD_generateSpar() {
        for (let i = 0, len = 17; i < len; ++i) {
          switch (i) {
          case 0:
            yield this.message;
            break;
          case 1:
            yield this.token;
            break;
          case 6:
            if (!this.window && !this.imageURL) {
              yield null;
            } else {
              let media = LinkDetector.get(this.window, this.imageURL);
              let data = [JSON.stringify(media.generateData())];
              if (media.hasPhoto) {
                data.push(JSON.stringify(media.generateData(true)));
              }
              yield JSON.stringify(data);
            }

            break;
          case 8:
            yield JSON.stringify({aclEntries: this.aclEntries});
            break;
          case 9:
          case 11:
          case 12:
            yield true;
            break;
          case 15:
          case 16:
            yield false;
            break;
          case 10:
          case 14:
            yield [];
            break;
          default:
            yield null;
            break;
          }
        }
      },
    };

  })();

  const LinkDetector = (function () {
    let commonProto = {
      init: function (win, imageURL) {
        this.window = win;
        this.imageURL = imageURL;
        if (imageURL) {
          if (win)
            this.hasPhoto = true;

          this.setupImage();
        }
      },
      type: {
        TITLE: 3,
        MEDIA_LINK: 5,
        UPLOADER: 9,
        TEXT: 21,
        TYPE: 24,
        IMAGE: 41,
        PROVIDER: 47,
      },
      generateData: function (isPhoto) {
        let data = new Array(48);
        data[this.type.TITLE] = this.getTitle(isPhoto);
        data[this.type.MEDIA_LINK] = this.getMediaLink(isPhoto);
        data[this.type.UPLOADER] = this.getUploader(isPhoto);
        data[this.type.TEXT] = this.getContentsText(isPhoto);
        data[this.type.TYPE] = this.getMediaType(isPhoto);
        data[this.type.IMAGE] = this.getMediaImage(isPhoto);
        data[this.type.PROVIDER] = this.getProvider(isPhoto);
        return data;
      },
      hasPhoto: false,
      imageElement: null,
      setupImage: function () {
        let imgs = content.document.images;
        for (let i = 0, len = imgs.length, img; img = imgs[i]; ++i) {
          if (img.src == this.imageURL) {
            this.imageElement = img;
          }
        }
      },
      getMimeType: function (uri, defaultType) {
        if (!(uri instanceof Ci.nsIURI))
          uri = util.createURI(uri);

        try {
          return MIME.getTypeFromURI(uri);
        } catch (e) {}
        return defaultType;
      },
      getTitle: function (isPhoto) {
        return (isPhoto || !this.window) ? null : this.window.document.title;
      },
      getContentsText: function (isPhoto) {
        if (!this.window || isPhoto)
          return null;

        let sel = this.window.getSelection();
        if (sel.isCollapsed)
          return '';

        let sels = [];
        for (let i = 0, count = sel.rangeCount; i < count; ++i) {
          let r = sel.getRangeAt(i),
              fragment = r.cloneContents();
          sels.push(Elements.node2txt(fragment, r.commonAncestorContainer.localName));
        }
        return sels.join('<br/>(snip)<br/>');
      },
      getUploader: function () [],
      getMediaLink: function (isPhoto) {
        if (this.window && !isPhoto)
          return [null, this.window.location.href];

        let data = [null, this.imageURL];
        if (this.imageElement)
          data.push(this.imageElement.height, this.imageElement.width);

        return data;
      },
      getMediaType: function (isPhoto) {
        if (isPhoto) {
          let type = this.getMimeType(this.imageURL, 'image/jpeg');
          let data = [null, this.imageURL, null, type, 'photo', null,null,null,null,null,null,null];
          if (this.imageElement)
            data.push(this.imageElement.width, this.imageElement.height);
          else
            data.push(null,null);

          return data;
        }
        if (this.window && !isPhoto) {
          type = this.window.document.contentType;
          switch (type.split('/')[0]) {
          case 'image':
            return [null, this.window.location.href, null, type, 'image'];
          case 'text':
          default:
            return [null, this.window.location.href, null, 'text/html', 'document'];
          }
        } else if (this.imageURL) {
          type = this.getMimeType(this.imageURL, 'image/jpeg');
          return [null, this.imageURL, null, type, 'image'];
        }
        return null
      },
      getMediaImage: function (isPhoto) {
        let url;
        if (this.window && !isPhoto) {
          let type = this.window.document.contentType.split('/');
          if (type[0] != 'image') {
            let host = this.window.location.host;
            url = '//s2.googleusercontent.com/s2/favicons?domain=' + host;
            return [ [null, url, null, null], [null, url, null, null] ];
          } else {
            url = this.window.location.href;
            return [ [null, url, null, null], [null, url, null, null] ];
          }
        }

        let data = [null, this.imageURL];
        let w = null, h = null;
        if (this.imageElement) {
          w = this.imageElement.width, h = this.imageElement.height;
          w = w / h * 120;
          h = 120;
        }
        data.push(h, w);
        return [ data, data ];
      },
      getProvider: function (isPhoto) {
        return [ [null, (isPhoto ? 'images' : ''), 'http://google.com/profiles/media/provider'] ];
      }
    };
    let classes = {}, checker = {};
    function MediaLink() { this.init.apply(this, arguments); };
    MediaLink.prototype = commonProto;

    let self = {
      addType: function (name, checkFunc, proto) {
        checker[name] = checkFunc;
        let func = function () { this.init.apply(this, arguments); };
        proto.__super__ = proto.__proto__ = commonProto;
        func.prototype = proto;
        classes[name] = func;
      },
      get: function (aWindow, aImageURL) {
        for (let [key, checkFunc] in Iterator(checker)) {
          if (checkFunc(aWindow, aImageURL)) {
            return new classes[key](aWindow, aImageURL);
          }
        }
        return new MediaLink(aWindow, aImageURL);
      }
    };

    (function () {
      // -------------------------------------------------------------------------
      // YouTube
      // ----------------------------------------------------------------------{{{
      self.addType('youtube',
        function (win) {
          if (!win) return false;

          return /^https?:\/\/(?:.*\.)?youtube.com\/watch/.test(win.location.href);
        }, {
          get VIDEO_ID () {
            let id = this.window.wrappedJSObject.yt.config_.VIDEO_ID;
            Object.defineProperty(this, 'VIDEO_ID', {value: id});
            return id;
          },
          getMediaLink: function () [null, 'http://www.youtube.com/v/' + this.VIDEO_ID + '&hl=en&fs=1&autoplay=1'],
          getContentsText: function () this.window.document.querySelector('meta[name=description]').content,
          getMediaType: function () [null, this.window.location.href, null, 'application/x-shockwave-flash', 'video'],
          getMediaImage: function () {
            let url = 'https://ytimg.googleusercontent.com/vi/' + this.VIDEO_ID + '/hqdefault.jpg';
            return [ [null, url, 120, 160], [null, url, 120, 160] ];
          },
          getProvider: function () [ [null, 'youtube', 'http://google.com/profiles/media/provider'] ],
        }); // }}}
      // -------------------------------------------------------------------------
      // Gyazo
      // ----------------------------------------------------------------------{{{
      self.addType('gyazo',
        function (win, image) {
          let reg = /^http:\/\/gyazo\.com\/\w+(\.png)?/;
          return reg.test(image);
        }, {
          init: function (win, imageURL) {
            this.window = win;
            if (imageURL.lastIndexOf('.png') != imageURL.length - 4)
              imageURL += '.png';

            this.imageURL = imageURL;
            this.hasPhoto = true;
          },
        });
      // }}}
    })();
    return self;
  })();

  // }}}

  // Export {{{

  __context__.command = Commands;
  __context__.element = Elements;
  __context__.selector = S;
  __context__.rule = R;
  __context__.linkDetector = LinkDetector;

  // }}}

  // Event {{{

  // リロードしたら、ページ構成変わってるやん！！！みたいなの対応
  events.addSessionListener(
    document.getElementById('appcontent'),
    'DOMContentLoaded',
    function (event) {
      let doc = event.originalTarget;
      // XXX G+ 内の他のページへ跳ぶときは、plus.google.com を経由するが、それは除外する
      if (
        doc instanceof HTMLDocument &&
        !doc.defaultView.frameElement &&
        doc.location.host === 'plus.google.com' &&
        doc.body &&
        doc.body.children.length
      ) {
        __context__.selector._clearCache();
      }
    },
    true
  );

  // 謎のキーが効かなくなるバグへの対応
  autocommands.add(
    'LocationChange',
    /https:\/\/plus\.google\.com\//,
    function () {
      if (!(window.content.document instanceof HTMLDocument))
        return;

      (function findFrames(frame) {
        if (frame.document.body instanceof HTMLBodyElement)
          frame.focus();
        Array.forEach(frame.frames, findFrames);
      }(window.content));
    }
  );

  // }}}

})();

// vim:sw=2 ts=2 et si fdm=marker: