/* {{{
Copyright (c) 2008, anekos.
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。                #
###################################################################################

}}} */

// PLUGIN_INFO {{{
let PLUGIN_INFO =
<VimperatorPlugin>
  <name>asdfghjkl;</name>
  <description>Inputting numbers by asdfghjkl; keys in hint mode.</description>
  <description lang="ja">Hintモードで、asdfghjkl;キーを使って数字入力をする。</description>
  <version>1.4.1</version>
  <author mail="anekos@snca.net" homepage="http://d.hatena.ne.jp/nokturnalmortum/">anekos</author>
  <license>new BSD License (Please read the source code comments of this plugin)</license>
  <license lang="ja">修正BSDライセンス (ソースコードのコメントを参照してください)</license>
  <updateURL>https://github.com/vimpr/vimperator-plugins/raw/master/asdfghjkl.js</updateURL>
  <minVersion>2.0pre</minVersion>
  <maxVersion>2.0pre</maxVersion>
  <detail><![CDATA[
    == Usage ==
      In hint-mode, When press <Space>, enter into asdfghjkl; mode.
      (If you want to leave this mode, re-press <Space>)

      You can change the keybind for enter into asdfghjkl like below
      >||
       let g:asdfghjkl_mode_change_key = "<C-c>"
      ||<

      You can also change the keys for inputting numbers like below
      >||
       let g:asdfghjkl_hintchars = "/zxcvbnm,."
      ||<

     Note that the numbers 0-9 are corresponding to
     characters from the left side to the right side of the string.

    == Link ==
      http://d.hatena.ne.jp/nokturnalmortum/20081021#1224543467
  ]]></detail>
  <detail lang="ja"><![CDATA[
    == Usage-ja ==
      ヒントモードで、<Space> を押すと asdfghjkl; モード(?)に入ります。
      出たい場合は、もう一度押します。

      切り替えキーを変更したい場合は、以下のように設定できます。
      >||
        let g:asdfghjkl_mode_change_key = "<C-c>"
      ||<

      数字入力のためのキーは、以下のように変更出来ます。
      >||
        let g:asdfghjkl_hintchars = "/zxcvbnm,."
      ||<
     それぞれの文字は左側から0-9の数字の入力に対応します。

    == Link ==
      http://d.hatena.ne.jp/nokturnalmortum/20081021#1224543467
  ]]></detail>
</VimperatorPlugin>;
// }}}

(function () {
  let asdfghjkl_default = eval(liberator.globalVariables.asdfghjkl_default || 'false');
  let mode_change_key = liberator.globalVariables.asdfghjkl_mode_change_key || '<Space>';
  let useShift = eval(liberator.globalVariables.asdfghjkl_useShift || 'false');
  let asdfghjkl_hintchars = liberator.globalVariables.asdfghjkl_hintchars || ";asdfghjkl";
  let active = false;

  function around (obj, name, func) {
    let next = obj[name];
    obj[name] = function ()
      let (self = this, args = arguments)
        func.call(self,
                  function () next.apply(self, args),
                  args);
  }

  around(events, 'onKeyPress', function (next, [event]) {
    if (modes.extended & modes.HINTS) {
      let act = active;
      let key = events.toString(event);
      if (key == mode_change_key) {
        active = !active;
        event.preventDefault();
        event.stopPropagation();
        return;
      }
      if (key.length == 1) {
        if (useShift && event.shiftKey) {
          act = !act;
          key = key.toLowerCase();
        }
        if (act) {
          let n = asdfghjkl_hintchars.indexOf(key);
          if (n >= 0) {
            events.feedkeys(n.toString(), true);
            event.preventDefault();
            event.stopPropagation();
            return;
          }
        }
      }
    }
    return next();
  });

  around(/*
 * ==VimperatorPlugin==
 * @name            nicontroller.js
 * @description     this script give you keyboard opration for nicovideo.jp.
 * @description-ja  ニコニコ動画のプレーヤーをキーボードで操作できるようにする。
 * @author          janus_wel <janus_wel@fb3.so-net.ne.jp>
 * @version         0.56
 * @minversion      2.0pre 2008/10/16
 * ==/VimperatorPlugin==
 *
 * LICENSE
 *   New BSD License
 *
 * USAGE
 *   :nicoinfo
 *     プレーヤーに関しての情報を表示する。今のところバージョンだけ。
 *   :nicopause
 *     再生 / 一時停止を切り替える。
 *   :nicomute
 *     音声あり / なしを切り替える。
 *   :nicommentvisible
 *     コメント表示 / 非表示を切り替える。
 *   :nicorepeat
 *     リピート再生するかどうかを切り替える。
 *   :nicosize
 *     最大化 / ノーマルを切り替える。
 *   :nicoseek [position]
 *     指定した場所にシークする。秒数で指定が可能。
 *     指定なしの場合一番最初にシークする。
 *     負数の場合終わりからの秒数指定となる。
 *   :nicoseek! delta
 *     現在の位置から delta 分離れた所にシークする。秒数で指定が可能。
 *     マイナスを指定すると戻る。指定なしの場合変化しない。
 *   :nicovolume [volume]
 *     ボリュームを設定する。 0 ～ 100 が指定できる。
 *     指定なしの場合 100 にセットする。
 *   :nicovolume! delta
 *     ボリュームを現在の値から変更する。 -100 ～ +100 を指定可能。
 *     指定なしの場合変化しない。
 *   :nicodescription
 *     説明文・メニューの表示 / 非表示を切り替える
 *   :nicomment comment
 *     コメント欄を指定した文字列で埋める。
 *     詳しい機能は http://d.hatena.ne.jp/janus_wel/20080913/1221317583
 *   :nicommand command
 *     コマンド欄を指定した文字列で埋める。
 *     プレミアムかどうかで補完可能なコマンドも変化。
 *     補完はけっこう賢くなったと思う。
 *
 * HISTORY
 *   2008/07/13 ver. 0.10   - initial written.
 *   2008/07/14 ver. 0.20   - add nicosize, nicoseek, nicovolume.
 *   2008/07/15 ver. 0.30   - add nicoinfo.
 *   2008/07/19 ver. 0.31   - allow assign mm:ss format to seekTo method.
 *                              thanks to id:nokturnalmortum
 *                              refer: http://d.hatena.ne.jp/nokturnalmortum/20080718#1216314934
 *                          - fix error message.
 *   2008/09/12 ver. 0.40   - completer function of :nicommand -> usefull.
 *                          - add feature: comment input assistance.
 *   2008/09/14 ver. 0.41   - fix the bug that happen by adding method to Array.
 *                          - fix the nicopause bug associated with
 *                            flvplayer's status('buffering' and 'end').
 *                              thanks to なまえ (no name ?)
 *                              refer: http://d.hatena.ne.jp/janus_wel/20080914/1221387317
 *   2008/10/01 ver. 0.50   - add :nicodescription.
 *   2008/10/02 ver. 0.51   - refactoring.
 *                          - use Error object when throw exception.
 *                          - extract constant variables from code
 *                            and define in NicoPlayerController.constants.
 *   2008/10/08 ver. 0.52   - correspond Vimperator specification
 *                            "bang" in extra object on addUserCommand.
 * */

/*
_vimperatorrc に以下のスクリプトを貼り付けると幸せになれるかも
コマンド ( [',n-'] や [',n+'] の部分 ) は適宜変えてね。

javascript <<EOM
// [N],n-
// N 秒前にシークする。
// 指定なしの場合 10 秒前。
liberator.modules.mappings.addUserMap(
    [liberator.modules.modes.NORMAL],
    [',n-'],
    'seek by count backward',
    function(count) {
        if(count === -1) count = 10;
        liberator.execute(':nicoseek! ' + '-' + count);
    },
    { flags: liberator.modules.Mappings.flags.COUNT }
);

// [N],n+
// N 秒後にシークする。
// 指定なしの場合 10 秒後。
liberator.modules.mappings.addUserMap(
    [liberator.modules.modes.NORMAL],
    [',n+'],
    'seek by count forward',
    function(count) {
        if(count === -1) count = 10;
        liberator.execute(':nicoseek! ' + count);
    },
    { flags: liberator.modules.Mappings.flags.COUNT }
);
EOM
*/

(function() {

// class definition
// cookie manager
function CookieManager() {
    this.initialize.apply(this, arguments);
}
CookieManager.prototype = {
    initialize: function (uri) {
        const Cc = Components.classes;
        const Ci = Components.interfaces;

        const MOZILLA = '@mozilla.org/';
        const IO_SERVICE = MOZILLA + 'network/io-service;1';
        const COOKIE_SERVICE = MOZILLA + 'cookieService;1';

        this.ioService = Cc[IO_SERVICE].getService(Ci.nsIIOService);
        this.cookieService = Cc[COOKIE_SERVICE].getService(Ci.nsICookieService);
        if(!this.ioService || !this.cookieService) {
            throw new Error('error on CookieManager initialize.');
        }

        this.readCookie(uri);
    },

    readCookie: function (uri) {
        if(uri) {
            this.uri = uri;
            this.uriObject = this.ioService.newURI(uri, null, null);
            this.cookie = this._deserializeCookie(this._getCookieString());
        }
    },

    _getCookieString: function () {
        return this.uriObject
            ? this.cookieService.getCookieString(this.uriObject, null)
            : null;
    },

    _setCookieString: function (cookieString) {
        if(this.uriObject && cookieString) {
            this.cookieService.setCookieString(this.uriObject, null, cookieString, null);
        }
    },

    _deserializeCookie: function (cookieString) {
        var cookies = cookieString.split('; ');
        var cookie = {};
        var key, val;
        for (let i=0, max=cookies.length ; i<max ; ++i) {
            [key, val] = cookies[i].split('=');
            cookie[key] = val;
        }
        return cookie;
    },

    getCookie: function (key) {
        return this.cookie[key] ? this.cookie[key] : null;
    },

    setCookie: function (obj) {
        this.cookie[obj.key] = obj.value;
        var string = [
            obj.key + '=' + obj.value,
            'domain=' + obj.domain,
            'expires=' + new Date(new Date().getTime() + obj.expires),
        ].join(';');
        this._setCookieString(string);
    },
};

// NicoPlayerController Class
function NicoPlayerController() {
    this.initialize.apply(this, arguments);
}
NicoPlayerController.prototype = {
    initialize: function () {
        this.cookieManager = new CookieManager();
    },

    constants: {
        VERSION:        '0.55',

        CARDINAL_NUMBER:    10,

        NICO_DOMAIN:    '.nicovideo.jp',
        NICO_URL:       'http://www.nicovideo.jp/',
        WATCH_URL:      '^http://[^.]+\.nicovideo\.jp/watch/',
        WATCH_PAGE:     1,

        FLVPLAYER_NODE_ID: 'flvplayer',

        STATE_PLAYING:  'playing',
        PLAY:           true,
        PAUSE:          false,

        STATE_SIZE_NORMAL:  'normal',
        STATE_SIZE_FIT:     'fit',

        NAME_PREMIUM_NO:     'premiumNo',
        NAME_PLAYER_VERSION: 'PLAYER_VERSION',

        SEEKTO_DEFAULT:     0,
        SEEKBY_DEFAULT:     0,
        VOLUMETO_DEFAULT:   100,
        VOLUMEBY_DEFAULT:   0,

        DESCRIPTION_HIDDEN_NODE_ID:    'des_1',
        DESCRIPTION_DISPLAYED_NODE_ID: 'des_2',

        DESCRIPTION_HIDDEN_STATE:       0,
        DESCRIPTION_DISPLAYED_STATE:    1,

        COOKIE_DESCRIPTION_NAME:    'desopen',
        COOKIE_EXPIRES:             60 * 60 * 24 * 365 * 1000,

        COMMAND_NORMAL: [
            ['naka',      'normal comment (flow right to left)'],
            ['ue',        'fix comment to vertical top and horizonal center of the screen'],
            ['shita',     'fix comment to vertical bottom and horizonal center of the screen'],
            ['medium',    'normal size comment'],
            ['big',       'big size comment'],
            ['small',     'small size comment'],
            ['white',     'white color comment'],
            ['red',       'red color comment'],
            ['pink',      'pink color comment'],
            ['orange',    'orange color comment'],
            ['yellow',    'yellow color comment'],
            ['green',     'green color comment'],
            ['cyan',      'cyan color comment'],
            ['blue',      'bule color comment'],
            ['purple',    'purple color comment'],
            ['184',       'anonymouse comment'],
            ['sage',      'post comment on "sage" mode'],
            ['invisible', 'invisible comment'],
        ],
        COMMAND_PREMIUM: [
            ['niconicowhite',  'nicinicowhite color comment'],
            ['truered',        'truered color comment'],
            ['passionorange',  'passionorange comment'],
            ['madyellow',      'madyellow comment'],
            ['elementalgreen', 'elementalgreen comment'],
            ['marineblue',     'marineblue'],
            ['nobleviolet',    'nobleviolet'],
            ['black',          'black'],
        ],
    },

    getControllerVersion: function () { return this.constants.VERSION; },
    getPlayerVersion: function () { return this.getValue(this.constants.NAME_PLAYER_VERSION); },

    pagecheck: function() {
        if(this.getURL().match(this.constants.WATCH_URL)) return this.constants.WATCH_PAGE;
        throw new Error('current tab is not watch page on nicovideo.jp');
    },

    getURL: function() { return liberator.modules.buffer.URL; },

    _flvplayer: function() {
        if(this.pagecheck() === this.constants.WATCH_PAGE) {
            let flvplayer = window.content.document.getElementById(this.constants.FLVPLAYER_NODE_ID);
            if(! flvplayer) throw new Error('flvplayer is not found');

            return flvplayer.wrappedJSObject || flvplayer;
        }
        return null;
    },

    togglePlay: function() {
        var p = this._flvplayer();
        (p.ext_getStatus() !== this.constants.STATE_PLAYING)
            ? p.ext_play(this.constants.PLAY)
            : p.ext_play(this.constants.PAUSE);

        if(p.ext_getStatus() === 'end') {
            let base = p.ext_getPlayheadTime();
            let self = this;
            setTimeout(function () {
                if (base !== p.ext_getPlayheadTime()) {
                    p.ext_play(self.constants.PAUSE);
                } else {
                    p.ext_setPlayheadTime(0);
                    p.ext_play(self.constants.PLAY);
                }
            }, 100);
        }
    },

    toggleMute: function() {
        var p = this._flvplayer();
        p.ext_setMute(! p.ext_isMute());
    },

    toggleCommentVisible: function() {
        var p = this._flvplayer();
        p.ext_setCommentVisible(! p.ext_isCommentVisible());
    },

    toggleRepeat: function() {
        var p = this._flvplayer();
        p.ext_setRepeat(! p.ext_isRepeat());
    },

    toggleSize: function() {
        var p = this._flvplayer();
        (p.ext_getVideoSize() === this.constants.STATE_SIZE_NORMAL)
            ? p.ext_setVideoSize(this.constants.STATE_SIZE_FIT)
            : p.ext_setVideoSize(this.constants.STATE_SIZE_NORMAL);
    },

    toggleDescription: function () {
        if(!(this.pagecheck() === this.constants.WATCH_PAGE)) {
            return;
        }

        // get nodes
        var hidden = window.content.document.getElementById(this.constants.DESCRIPTION_HIDDEN_NODE_ID);
        var displayed = window.content.document.getElementById(this.constants.DESCRIPTION_DISPLAYED_NODE_ID);

        // get cookie
        this.cookieManager.readCookie(this.constants.NICO_URL);
        var val = this.cookieManager.getCookie(this.constants.COOKIE_DESCRIPTION_NAME);

        if(!(hidden && displayed && val !== undefined && val !== null)) {
            return;
        }

        // change 'display' property of description nodes
        var escape = hidden.style.display;
        hidden.style.display = displayed.style.display;
        displayed.style.display = escape;

        // change cookie
        var change = (val == this.constants.DESCRIPTION_HIDDEN_STATE)
            ? this.constants.DESCRIPTION_DISPLAYED_STATE
            : this.constants.DESCRIPTION_HIDDEN_STATE;
        this.cookieManager.setCookie({
            key:     this.constants.COOKIE_DESCRIPTION_NAME,
            value:   change,
            domain:  this.constants.NICO_DOMAIN,
            expires: this.constants.COOKIE_EXPIRES,
        });
    },

    seekTo: function(position) {
        if(position) {
            if(position.match(/^(\d+):(\d+)$/)) {
                position = parseInt(RegExp.$1, this.constants.CARDINAL_NUMBER) * 60
                    + parseInt(RegExp.$2, this.constants.CARDINAL_NUMBER);
            }
            if(isNaN(position)) throw new Error('assign unsigned number : seekTo()');
        }
        else position = this.constants.SEEKTO_DEFAULT;

        var p = this._flvplayer();
        if (position < 0)
          p.ext_setPlayheadTime(parseInt(p.ext_getTotalTime()) + parseInt(position));
        else
          p.ext_setPlayheadTime(position);
    },

    seekBy: function(delta) {
        if(delta) {
            if(isNaN(delta)) throw new Error('assign signed number : seekBy()');
        }
        else delta = this.constants.SEEKBY_DEFAULT;

        var p = this._flvplayer();
        var position = p.ext_getPlayheadTime();
        position += parseInt(delta, this.constants.CARDINAL_NUMBER);

        p.ext_setPlayheadTime(position);
    },

    volumeTo: function(volume) {
        if(volume) {
            if(isNaN(volume)) throw new Error('assign unsigned number : volumeTo()');
        }
        else volume = this.constants.VOLUMETO_DEFAULT;

        var p = this._flvplayer();
        p.ext_setVolume(volume);
    },

    volumeBy: function(delta) {
        if(delta) {
            if(isNaN(delta)) throw new Error('assign signed number : volumeBy()');
        }
        else delta = this.constants.VOLUMEBY_DEFAULT;

        var p = this._flvplayer();
        var volume = p.ext_getVolume();
        volume += parseInt(delta, this.constants.CARDINAL_NUMBER);

        p.ext_setVolume(volume);
    },

    getValue: function(name) {
        return this._flvplayer().GetVariable(name);
    },

    setValue: function(name, value) {
        return this._flvplayer().SetVariable(name, value);
    },

    // return the clone not to damage
    // Array.apply() is cloning Array
    // (adding method to Array has a lot of troubles)
    // refer: http://la.ma.la/blog/diary_200510062243.htm
    getAvailableCommands: function() {
        return this.getValue(this.constants.NAME_PREMIUM_NO)
            ? this.constants.COMMAND_NORMAL.concat(this.constants.COMMAND_PREMIUM)
            : Array.apply(null, this.constants.COMMAND_NORMAL)
    }

};

// global object
var controller = new NicoPlayerController();

// command register
liberator.modules.commands.addUserCommand(
    ['nicoinfo'],
    'display player information',
    function() {
        try      {
            let info = [
                'player version     : ' + controller.getPlayerVersion(),
                'controller version : ' + controller.getControllerVersion(),
            ].join("\n");
            liberator.echo(info, liberator.modules.commandline.FORCE_MULTILINE);
        }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicopause'],
    'toggle play / pause',
    function() {
        try      { controller.togglePlay(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicomute'],
    'toggle mute',
    function() {
        try      { controller.toggleMute(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicommentvisible'],
    'toggle comment visible',
    function() {
        try      { controller.toggleCommentVisible(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicorepeat'],
    'toggle repeat',
    function() {
        try      { controller.toggleRepeat(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicoseek'],
    'controll seek bar',
    function(args) {
        try      {
            let arg = (args.length > 1)
                ? args[0].toString()
                : args.string;
            args.bang ? controller.seekBy(arg) : controller.seekTo(arg);
        }
        catch(e) { liberator.echoerr(e); }
    },
    {
        bang: true,
    }
);

liberator.modules.commands.addUserCommand(
    ['nicovolume'],
    'controll volume',
    function(args) {
        try      {
            let arg = (args.length > 1)
                ? args[0].toString()
                : args.string;
            args.bang ? controller.volumeBy(arg) : controller.volumeTo(arg);
        }
        catch(e) { liberator.echoerr(e); }
    },
    {
        bang: true,
    }
);

liberator.modules.commands.addUserCommand(
    ['nicosize'],
    'toggle video size',
    function() {
        try      { controller.toggleSize(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicodescription'],
    'toggle display or not the description for video',
    function() {
        try      { controller.toggleDescription(); }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicomment'],
    'fill comment box',
    function(args) {
        try      {
            let arg = args.string;

            let command, comment;
            [command, comment] = expandExCommand(arg);

            comment = comment.replace(/&emsp;/g, EMSP)
                             .replace(/&nbsp;/g, NBSP)
                             .replace(/<LF>/g,   LF);

            if(command) {
                controller.setValue('inputArea.MailInput.text', command);
            }
            controller.setValue('ChatInput.text', comment);
        }
        catch(e) { liberator.echoerr(e); }
    },
    {}
);

liberator.modules.commands.addUserCommand(
    ['nicommand'],
    'fill command box',
    function(arg) {
        try      { controller.setValue('inputArea.MailInput.text', arg.string); }
        catch(e) { liberator.echoerr(e); }
    },
    {
        completer: function(args) {
            var arg = args.string;

            // get available commands by roll
            var availableCommands = controller.getAvailableCommands();

            // for no argument
            if(!arg) { return [0, availableCommands]; }

            // make array of inputted words
            // and current input word shoud be last (dayone ?)
            var inputted = arg.toLowerCase().split(/\s+/);
            var current = inputted[inputted.length - 1];
            // complete position is the top of last word
            var completePosition = arg.lastIndexOf(' ') + 1;

            // exclude inputted word from candidates
            var candidates = availableCommands.filter( function(commandSet) {
                for(let i=0, numofInputted=inputted.length ; i<numofInputted ; ++i) {
                    if(commandSet[0] === inputted[i]) {
                        inputted.splice(i, 1);
                        return false;
                    }
                }
                return true;
            });

            // display all candidates in after space ' '
            if(inputted[inputted.length - 1] !== current) {
                // complete position is the next of last space
                completePosition = arg.length + 1;
                return [completePosition, candidates];
            }

            // return the set that start with current word
            var commands = candidates.filter( function(commandSet) {
                return (commandSet[0].indexOf(current) === 0);
            });

            return [completePosition, commands];
        },
    }
);


// for ex-command -------------------------------------------------------
// constants
const MAX_LINE = {
    big:    16,
    medium: 25,
    small:  38,
};
const EMSP = '\u3000';
const NBSP = '\u00a0';
const LF = '\u000a';
const PROPATIES_DEFAULT = {
    fixFlag: false,
    max    : MAX_LINE['medium'],
    line   : 1,
    size   : '',
};
const COMMAND_SEPARATOR = '|';

// functions
function expandExCommand(arg) {
    var command, comment;

    // command and comment is separated by COMMAND_SEPARATOR
    var temp = arg.split(COMMAND_SEPARATOR);
    if(temp.length > 1) {
        command = temp.shift();
        comment = temp.join(COMMAND_SEPARATOR);
    }
    else {
        comment = arg;
    }

    // ex_command is putted in braces
    if(comment.match(/^\{([^{}]+)\}(.+)/)) {
        let exCommand = RegExp.$1;
        let text = RegExp.$2;

        let properties = analysisExCommand(exCommand);

        // fine tune command about comment size
        if(properties.size) {
            if(command) {
                command = command.replace(/\s*big\s*/g, ' ')
                                 .replace(/\s*medium\s*/g, ' ')
                                 .replace(/\s*small\s*/g, ' ');
            }
            command += ' ' + properties.size;
        }

        // expand!!
        comment = buildLineBreakString(properties.line) + text;
        if(properties.fixFlag) {
            let post = buildLineBreakString(properties.max - properties.line + 1);
            comment += post + NBSP;
        }
    }

    return [command, comment];
}

// "&nbsp;" and <LF> on each line
function buildLineBreakString(numof) {
    // faster than string concatenate (+, +=)
    var string = Array(numof * 2);
    for(let i=1 ; i<numof ; ++i) {
        string.push(NBSP);
        string.push(LF);
    }

    return string.join('');
}

// RegExp hell
function analysisExCommand(exCommand) {
    // default set
    var properties = PROPATIES_DEFAULT;

    // fix or not
    if(exCommand.match(/\bfix\b/)) {
        properties.fixFlag = true;
    }

    // comment size and max line
    if(exCommand.match(/\b(big|medium|small)\b/)) {
        properties.size = RegExp.$1;
        properties.max = MAX_LINE[properties.size];
    }
    else if(exCommand.match(/\bmax(\d+)\b/)) {
        properties.max = RegExp.$1;
    }

    // line
    if(exCommand.match(/\bline(-?\d+)\b/)) {
        let line = parseInt(RegExp.$1, 10);
        if(line < 0) line = properties.max + line + 1;
        if(line > properties.max) line = properties.max;
        properties.line = line;
    }

    return properties;
}
})();

// vim: set sw=4 ts=4 et;