0.6.x/js/00_core/06_XEventDispatcher.js

   1 /**\r
   2  * X.EventDispatcher\r
   3  * \r
   4  *  1. as3 の EventDispatcher ライクなクラス。そのまま使ったり、継承したり。コールバック中にイベントを追加したら？削除したら？にも対処している。\r
   5  *  2. _rawObject メンバがいる場合、addEventListener, attachEvent, on 等で生のブラウザオブジェクトにリスナを登録する。\r
   6  *     window, document, HTMLElement, Image, XHR などが _rawObject\r
   7  * \r
   8  * use X.Callback\r
   9  * \r
  10  * https://developer.mozilla.org/ja/docs/Web/API/EventTarget.addEventListener\r
  11  * イベント発送中のリスナーの追加\r
  12  * EventListener がイベント処理中に EventTarget に追加された場合、それが現在のアクションによって実行されることはありませんが、浮上フェーズのように、後の段階のイベントフローで実行されるかもしれません。\r
  13  * \r
  14  * https://developer.mozilla.org/ja/docs/Web/API/EventTarget.removeEventListener\r
  15  * イベントリスナーが イベントを処理中であるイベントターゲットから削除された場合、現在のアクションによってそのイベントリスナーが実行されることはありません。\r
  16  * イベントリスナーは、決して削除された後に実行されることはありません。\r
  17  * イベントターゲット上にある現在のどのイベントリスナーも指定していない引数付きの removeEventListener は、何の効果もありません。\r
  18  */\r
  19 \r
  20 X.Event = {\r
  21         COMPLETE      : 1,\r
  22         SUCCESS       : 2,\r
  23         ERROR         : 3,\r
  24         PROGRESS      : 4,\r
  25         BEFORE_CANCEL : 5,\r
  26         CANCELED      : 6,\r
  27         TIMEOUT       : 7,\r
  28         // INSTANCE_KILLED\r
  29         // KILL_INSTANCE_CANCELED\r
  30         _LAST_EVENT   : 7\r
  31 };\r
  32 \r
  33 // --- define / local variables ----------------------------\r
  34 var x_eventdispatcher_once       = false,\r
  35         x_eventdispatcher_needsIndex = false,\r
  36         x_eventdispatcher_temp       = {};\r
  37 \r
  38 if( X.UA.MacIE ){\r
  39         x_eventdispatcher_temp.DOM_W3C    = true;\r
  40         x_eventdispatcher_temp.EVENT_DOM0 = true;\r
  41 } else\r
  42 if( X.UA.IE4 ){ // ie4 & iemobi4\r
  43         x_eventdispatcher_temp.DOM_IE4    = true;\r
  44         x_eventdispatcher_temp.EVENT_DOM0 = true;\r
  45 } else\r
  46 if( document.getElementById ){\r
  47         x_eventdispatcher_temp.DOM_W3C = true;\r
  48         if( document.addEventListener ){\r
  49                 x_eventdispatcher_temp.EVENT_W3C = true;\r
  50         } else\r
  51         if( document.attachEvent ){\r
  52                 x_eventdispatcher_temp.EVENT_IE = true;\r
  53         } else {\r
  54                 x_eventdispatcher_temp.EVENT_DOM0 = true;\r
  55         };\r
  56 } else\r
  57 if( document.all ){\r
  58         x_eventdispatcher_temp.DOM_IE4    = true;\r
  59         x_eventdispatcher_temp.EVENT_DOM0 = true;\r
  60 } else\r
  61 if( document.layers ){\r
  62         \r
  63 } else {\r
  64         \r
  65 };\r
  66 \r
  67 /**\r
  68  * イベントターゲットをラップする場合(widnow, document, Image, XHR 等)、通常は　new 時に渡します。参照:コンストラクタ実体 {@link X.EventDispatcher.Constructor}\r
  69  * アプリケーション独自のイベントをやり取りしたいだけ、という場合、イベントターゲットは不要です。\r
  70  * @constructor\r
  71  * @classdesc EventTarget オブジェクトをラップしたり、アプリケーションで独自に定義したイベントを発信するためのクラスです。\r
  72  * listen, unlisten, dispatch という addEventListener, removeEventListener, dispatchEvent に対応する関数を持ちます。さらに listening という　as3 の hasEventListener に相当する関数を持ちます。\r
  73  * as3 の EventDispatcher に相当する機能に加え、イベントターゲットオブジェクト(widnow, document, HTMLElement, XHR 等)が設定されていた場合に、それらへ実際のイベント登録・解除も行います。\r
  74  * このイベントの登録・解除はクロスブラウザ対策が施されていて、IE5～8の独自イベントの差異を吸収し、DOM0 に対しても複数のイベントリスナを登録します。\r
  75  * さらに、コールバックに対して、this コンテキストや、追加の引数を指定できます。 this コンテキストを指定しなかった場合、EventDispatcher インスタンスがコールバック関数の this になります。 \r
  76  * @param {object=} opt_argument \r
  77  */\r
  78 X.EventDispatcher =\r
  79         X.Class.create(\r
  80                 'EventDispatcher',\r
  81                 {\r
  82 \r
  83             /**\r
  84              * @namespace\r
  85              * @memberof X.EventDispatcher\r
  86              */\r
  87 \r
  88                 /**\r
  89                  * イベントリスナをイベント名(string)や数値(1~,フレームワーク内で定義)をキーとするArrayで記憶します。\r
  90                  * Arrayには、{k:種類,x:コンテキスト(thisObject),f:関数,s:サプリメントする引数の配列} というハッシュ、または関数が蓄えられています。\r
  91                  * @private\r
  92                  * @type {Object.<(number|string), Array.<(callbackDef|function)>>}\r
  93                  */\r
  94                         _listeners    : null,\r
  95 \r
  96                 /**\r
  97                  * _rawObject には HTMLElement, window, document, XHR といったイベントターゲットオブジェクトを設定します。\r
  98                  * _rawObject が設定されていると on(), off() 時に addEventListener(DOM Level2) や detachEvent(ie5～8), on～(DOM0) 等を操作します。\r
  99                  * _rawObject は最初の on() 前に設定しておかないと addEventListener 等が意図したように行われません。\r
 100                  * X.Dom.Node では非同期に HTMLElement を生成していて、要素生成以前に on, off を呼び出すことができます。これは適宜に migrateEvent, restoreEvent を呼んで解決しているためです。\r
 101                  * @private\r
 102                  * @type {Object}\r
 103                  */\r
 104                         _rawObject      : null,\r
 105                         _handleEvent  : null,\r
 106                         \r
 107                         _dispatching  : 0,     // dispatch 中の unlisten で使用\r
 108                         _unlistens    : null,  // dispatch 中の unlisten で使用\r
 109                         _reserves     : null,  // dispatch中に unlisten されたイベントリスナ\r
 110                         _killReserved : false,\r
 111                         \r
 112             /**\r
 113              * X.EventDispatcher のコンストラクタの実体。\r
 114              *　@private\r
 115              * @this {X.EventDispatcher}\r
 116              */\r
 117                         Constructor : function( rawObject ){\r
 118                                 if( rawObject ){\r
 119                                         this._rawObject = rawObject;\r
 120                                 };\r
 121                         },\r
 122 \r
 123             /**\r
 124              * \r
 125              * @this {X.EventDispatcher}\r
 126              */\r
 127                         on     : x_eventdispatcher_on,\r
 128                         listen : x_eventdispatcher_on,\r
 129                         \r
 130                         listenOnce : function( type, arg1, arg2, arg3 ){\r
 131                                 x_eventdispatcher_once = true;\r
 132                                 this.listen( type, arg1, arg2, arg3 );\r
 133                                 x_eventdispatcher_once = false;\r
 134                                 return this;\r
 135                         },\r
 136                         \r
 137                         off      : x_eventdispatcher_off,\r
 138                         unlisten : x_eventdispatcher_off,\r
 139                         \r
 140                         listening : function( type, arg1, arg2, arg3 ){\r
 141                                 var list = this._listeners, unlistens, i, f, hash;\r
 142                                 if( type === undefined ) return !!list;\r
 143                                 if( !list || !( list = list[ type ] ) ) return false;\r
 144                                 if( arg1 === undefined ) return true;\r
 145                                 \r
 146                                 if( arg1.k ){\r
 147                                         hash = arg1;\r
 148                                 } else {\r
 149                                         hash = X.Callback._classifyCallbackArgs( arg1, arg2, arg3, this );\r
 150                                 };\r
 151                                 \r
 152                                 if( ( unlistens = this._unlistens ) && ( unlistens = unlistens[ type ] ) ){\r
 153                                         for( i = unlistens.length; i; ){\r
 154                                                 f = unlistens[ --i ];\r
 155                                                 if( f === hash || ( f.x === hash.x && f.f === hash.f && f.s === hash.s ) ) return false;\r
 156                                         };\r
 157                                 };\r
 158                                 for( i = list.length; i; ){\r
 159                                         f = list[ --i ];\r
 160                                         if( f === hash || ( f.x === hash.x && f.f === hash.f && f.s === hash.s ) ) return x_eventdispatcher_needsIndex ? i : true;\r
 161                                 };\r
 162                                 return false;\r
 163                         },\r
 164                         /*\r
 165                          * dispatch 中に dispatch が呼ばれるケースがあるため、\r
 166                          * _dispatching では その深さを保存する\r
 167                          * _dispatching が 0 のときに unlistens を削除する\r
 168                          *\r
 169                          */\r
 170                         dispatch : function( e ){\r
 171                                 // dispatch 中の listen は？\r
 172                                 var list  = this._listeners,\r
 173                                         ret   = X.Callback.NONE,\r
 174                                         type  = e.type,\r
 175                                         unlistens, i, l, f, r, sysOnly;\r
 176                                 \r
 177                                 if( !list ) return ret;\r
 178                                 \r
 179                                 // 数値, 文字が渡された場合\r
 180                                 if( !type ){\r
 181                                         type = e;\r
 182                                         e = { type : type };\r
 183                                 };\r
 184                                 e.target = e.target || this;\r
 185                                 \r
 186                                 if( !( list = list[ type ] ) ) return ret;\r
 187                                 \r
 188                                 ++this._dispatching;\r
 189                                 \r
 190                                 // todo:\r
 191                                 // type も保存\r
 192                                 this._unlistens = this._unlistens || {};\r
 193                                 unlistens = this._unlistens[ type ];\r
 194                                 \r
 195                                 for( i = 0; i < list.length; ++i ){\r
 196                                         f = list[ i ];\r
 197                                         if( !unlistens ){\r
 198                                                 unlistens = this._unlistens[ type ];\r
 199                                         };\r
 200                                         if( unlistens && unlistens.indexOf( f ) !== -1 ) continue;\r
 201                                         \r
 202                                         r = X.Callback.NONE;\r
 203                                         if( f.k ){\r
 204                                                 f.a = [ e ];\r
 205                                                 r = X.Callback._proxyCallback( f );\r
 206                                         } else {\r
 207                                                 r = f.call( this, e );\r
 208                                         };\r
 209                                         \r
 210                                         if( f.once || r & X.Callback.UN_LISTEN ){\r
 211                                                 // dispatch 中に unlisten が作られることがある\r
 212                                                 if( !unlistens ){\r
 213                                                         unlistens = this._unlistens || ( this._unlistens = {} );\r
 214                                                         unlistens = unlistens[ type ] || ( unlistens[ type ] = [] );\r
 215                                                 };\r
 216                                                 unlistens.indexOf( f ) === -1 && ( unlistens[ unlistens.length ] = f );\r
 217                                         };\r
 218 \r
 219                                         if( r & X.Callback.STOP_NOW ){\r
 220                                                 sysOnly = true;\r
 221                                         };\r
 222                                         ret |= r;\r
 223                                 };\r
 224                                 \r
 225                                 if( ( --this._dispatching ) === 0 ){\r
 226                                         // dispatch 中に unlisten された要素の削除\r
 227                                         unlistens = this._unlistens;\r
 228                                         delete this._dispatching;\r
 229                                         delete this._unlistens;                                 \r
 230                                         \r
 231                                         for( type in unlistens ){\r
 232                                                 list = unlistens[ type ];\r
 233                                                 for( i = list.length; i; ){\r
 234                                                         this.unlisten( type, list[ --i ] );\r
 235                                                 };\r
 236                                                 list.length = 0;\r
 237                                                 delete unlistens[ type ];\r
 238                                         };\r
 239                                         \r
 240                                         if( this._killReserved ){\r
 241                                                 this.kill();\r
 242                                         } else\r
 243                                         if( list = this._reserves ){\r
 244                                                 for( i = 0, l = list.length; i < l; ++i ){\r
 245                                                         f = list[ i ];\r
 246                                                         x_eventdispatcher_once = f[ 4 ];\r
 247                                                         this.listen( f[ 0 ], f[ 1 ], f[ 2 ], f[ 3 ] );\r
 248                                                         x_eventdispatcher_once = false;\r
 249                                                         f.length = 0;\r
 250                                                 };\r
 251                                                 list.length = 0;\r
 252                                                 delete this._reserves;\r
 253                                         };\r
 254                                 };\r
 255                                 \r
 256                                 return ret;\r
 257                         },\r
 258                         \r
 259                         onKill : function(){\r
 260                                 if( this._dispatching ){\r
 261                                         this._killReserved = true;\r
 262                                         return false;\r
 263                                 };\r
 264                                 this._listeners && this.unlisten();\r
 265                         },\r
 266                         \r
 267                         asyncDispatch : function( delay, e ){\r
 268                                 return X.Timer.add( delay, 1, this, this.dispatch, [ e ] );\r
 269                         }\r
 270                 }\r
 271         );\r
 272 \r
 273 \r
 274 // --- implements ------------------------------------------\r
 275 function x_eventdispatcher_on( type, arg1, arg2, arg3 ){\r
 276         var list = this._listeners,\r
 277                 i, r, f;\r
 278         \r
 279         if( this._dispatching ){\r
 280                 if( !this._reserves ) this._reserves = [];\r
 281                 this._reserves[ this._reserves.length ] = [ type, arg1, arg2, arg3, x_eventdispatcher_once ];\r
 282                 return this;\r
 283         };\r
 284         \r
 285         if( X.Type.isArray( type ) ){\r
 286                 for( i = type.length; i; ){\r
 287                         this.listen( type[ --i ], arg1, arg2, arg3 );\r
 288                 };\r
 289                 return this;\r
 290         };\r
 291         \r
 292         ( !list || !list[ type ] ) && X.Type.isString( type ) && x_eventdispatcher_actualAddEvent( this, type );\r
 293         \r
 294         if( this.listening( type, arg1, arg2, arg3 ) ) return this;\r
 295 \r
 296         if( !list ) list = this._listeners = {};\r
 297         if( !( list = list[ type ] ) ) list = this._listeners[ type ] = [];\r
 298         \r
 299         f = X.Callback._classifyCallbackArgs( arg1, arg2, arg3, this );\r
 300         list[ list.length ] = f;\r
 301         f.once = x_eventdispatcher_once;\r
 302         \r
 303         return this;\r
 304 };\r
 305 \r
 306 function x_eventdispatcher_off( type, arg1, arg2, arg3 ){\r
 307         var list = this._listeners,\r
 308                 _list, reserves, unlistens, i, f;\r
 309         if( !list ) return this;\r
 310         \r
 311         if( X.Type.isArray( type ) ){\r
 312                 for( i = type.length; i; ){\r
 313                         this.unlisten( type[ --i ], arg1, arg2, arg3 );\r
 314                 };\r
 315                 return this;\r
 316         };\r
 317         \r
 318         if( type === undefined ){\r
 319                 // 全て削除\r
 320                 for( type in list ){\r
 321                         _list = list[ type ];\r
 322                         for( i = _list.length; i; ){\r
 323                                 this.unlisten( type, _list[ --i ] ); // override されていることがあるので、必ず unlisten を使用\r
 324                         };\r
 325                         // this.unlisten( type ); これは無茶！\r
 326                 };\r
 327                 return this;\r
 328         } else\r
 329         if( arg1 === undefined ){\r
 330                 // 同一タイプを全て削除\r
 331                 if( _list = list[ type ] ){\r
 332                         for( i = _list.length; i; ){\r
 333                                 this.unlisten( type, _list[ --i ] ); // override されていることがあるので、必ず unlisten を使用\r
 334                         };\r
 335                 };\r
 336                 return this;\r
 337         } else\r
 338         if( reserves = this._reserves ){\r
 339                 for( i = reserves.length; i; ){\r
 340                         f = reserves[ --i ];\r
 341                         if( f[ 0 ] === type && f[ 1 ] === arg1 && f[ 2 ] === arg2 && f[ 3 ] === arg3 ){\r
 342                                 reserves.splice( i, 1 );\r
 343                                 if( !reserves.legth ) delete this._reserves;\r
 344                                 return this;\r
 345                         };\r
 346                 };\r
 347         };\r
 348         \r
 349         x_eventdispatcher_needsIndex = true;\r
 350         i = this.listening( type, arg1, arg2, arg3 );\r
 351         x_eventdispatcher_needsIndex = false;\r
 352         if( i === false ) return this;\r
 353 \r
 354         f = ( _list = list[ type ] )[ i ];\r
 355         if( unlistens = this._unlistens ){\r
 356                 ( unlistens = unlistens[ type ] ) ?\r
 357                         ( unlistens[ unlistens.length ] = f ) :\r
 358                         ( this._unlistens[ type ] = [ f ] );\r
 359         } else {\r
 360                 delete f.once;\r
 361                 // f.kill === X.Callback._kill && f.kill();\r
 362                 _list.splice( i, 1 );\r
 363                 if( !_list.length ){\r
 364                         delete this._listeners[ type ];\r
 365                         X.Type.isString( type ) && x_eventdispatcher_actualRemoveEvent( this, type );\r
 366                         if( X.isEmptyObject( this._listeners ) ) delete this._listeners;\r
 367                 };\r
 368         };\r
 369         return this;\r
 370 };\r
 371 \r
 372 \r
 373 var x_eventdispatcher_actualAddEvent =\r
 374         // Days on the Moon DOM Events とブラウザの実装 \r
 375         // http://nanto.asablo.jp/blog/2007/03/23/1339502\r
 376         // Safari 2 では関数オブジェクトしか EventListener として使えませんが、Safari のナイトリービルドでは handleEvent メソッドを持つオブジェクトも EventListener として使えるようです。\r
 377         x_eventdispatcher_temp.EVENT_W3C && ( X.UA.WebKit < 525.13 || X.UA.Opera7 || X.UA.NetFront < 4 ) ? // Safari3-\r
 378                 (function( that, type ){\r
 379                         var raw = that._rawObject;\r
 380                         if( !raw ) return; \r
 381                         that._handleEvent = that._handleEvent || X.Callback.create( that, x_eventdispatcher_actualHandleEvent );\r
 382                         type = X.Dom.Event.Rename[ type] || type;\r
 383                         if( raw.addEventListener ){\r
 384                                 raw.addEventListener( type, that._handleEvent, false );\r
 385                         } else {\r
 386                                 // Safari は Image, Opera7 は window\r
 387                                 raw[ 'on' + type ] = that._handleEvent;\r
 388                         };\r
 389                 }) :\r
 390         x_eventdispatcher_temp.EVENT_W3C ?\r
 391                 (function( that, type ){\r
 392                         if( that._rawObject ){\r
 393                                 that._handleEvent = that._handleEvent || X.Callback.create( that, x_eventdispatcher_actualHandleEvent );\r
 394                                 that._rawObject.addEventListener( X.Dom.Event.Rename[ type ] || type, that._handleEvent, false );\r
 395                         };\r
 396                 }) :\r
 397         x_eventdispatcher_temp.EVENT_IE ?\r
 398                 (function( that, type ){\r
 399                         var raw = that._rawObject;\r
 400                         if( !raw ) return;\r
 401                         type = X.Dom.Event.Rename[ type ] || type;\r
 402                         //if( type === 'load' && that._tag && X.Dom.Event._LOAD_FIX_TAGS[ that._tag ] ){\r
 403                         //      type = 'readystatechange';\r
 404                         //};\r
 405                         if( that._isXHR ){\r
 406                                 // ie8- の XHR は window.event が更新されないため, eventType 毎に callback を指定する\r
 407                                 raw[ 'on' + type ] = X.Callback.create( that, X.EventDispatcher.prototype.dispatch, [ type ] );\r
 408                         } else {\r
 409                                 that._handleEvent = that._handleEvent || X.Callback.create( that, x_eventdispatcher_actualHandleEvent );\r
 410                                 \r
 411                                 if( raw.attachEvent ){\r
 412                                         raw.attachEvent( 'on' + type, that._handleEvent );\r
 413                                 } else {\r
 414                                         raw[ 'on' + type ] = that._handleEvent;\r
 415                                 };                              \r
 416                         };\r
 417 \r
 418                 }) :\r
 419                 (function( that, type ){\r
 420                         var raw = that._rawObject || ( that._ie4getRawNode && that._ie4getRawNode() );\r
 421                         if( !raw ) return;\r
 422                         raw[ 'on' + ( X.Dom.Event.Rename[ type ] || type ) ] = that._handleEvent = that._handleEvent || X.Callback.create( that, x_eventdispatcher_actualHandleEvent );\r
 423                 });\r
 424 \r
 425 \r
 426 var x_eventdispatcher_actualRemoveEvent =\r
 427         x_eventdispatcher_temp.EVENT_W3C && ( X.UA.WebKit < 525.13 || X.UA.Opera7 || X.UA.NetFront < 4 ) ? // Safari3-\r
 428                 (function( that, type ){\r
 429                         var raw = that._rawObject;\r
 430                         if( !raw ) return;\r
 431                         type = X.Dom.Event.Rename[ type ] || type;\r
 432                         \r
 433                         if( raw.addEventListener ){ // Image\r
 434                                 raw.removeEventListener( type, that._handleEvent, false );\r
 435                         } else {\r
 436                                 raw[ 'on' + type ] = null;\r
 437                         };\r
 438                         if( !that._listeners ){\r
 439                                 X.Callback._correct( that._handleEvent );\r
 440                                 delete that._handleEvent;\r
 441                         };\r
 442                 }) :\r
 443         x_eventdispatcher_temp.EVENT_W3C ?\r
 444                 (function( that, type ){\r
 445                         var raw = that._rawObject;\r
 446                         if( !raw ) return;\r
 447                         raw.removeEventListener( X.Dom.Event.Rename[ type ] || type, that._handleEvent, false );\r
 448                         if( !that._listeners ){\r
 449                                 X.Callback._correct( that._handleEvent );\r
 450                                 delete that._handleEvent;\r
 451                         };\r
 452                 }) :\r
 453         x_eventdispatcher_temp.EVENT_IE ?\r
 454                 (function( that, type ){\r
 455                         var raw = that._rawObject;\r
 456                         if( !raw ) return;\r
 457                         type = X.Dom.Event.Rename[ type ] || type;\r
 458                         //if( type === 'load' && that._tag && X.Dom.Event._LOAD_FIX_TAGS[ that._tag ] ){\r
 459                         //      type = 'readystatechange';\r
 460                         //};\r
 461                         if( that._isXHR ){\r
 462                                 X.Callback._correct( raw[ 'on' + type ] );\r
 463                                 raw[ 'on' + type ] = X.emptyFunction;\r
 464                                 raw[ 'on' + type ] = '';\r
 465                         } else {\r
 466                                 if( raw.attachEvent ){\r
 467                                         raw.detachEvent( 'on' + type, that._handleEvent );\r
 468                                 } else {\r
 469                                         raw[ 'on' + type ] = X.emptyFunction;\r
 470                                         raw[ 'on' + type ] = '';\r
 471                                 };\r
 472                                 \r
 473                                 if( !that._listeners ){\r
 474                                         X.Callback._correct( that._handleEvent );\r
 475                                         delete that._handleEvent;\r
 476                                 };                              \r
 477                         };\r
 478                 }) :\r
 479                 (function( that, type ){\r
 480                         var raw = that._rawObject || ( that._ie4getRawNode && that._ie4getRawNode() );\r
 481                         if( !raw ) return;\r
 482                         type = X.Dom.Event.Rename[ type ] || type;\r
 483                         raw[ 'on' + type ] = X.emptyFunction;\r
 484                         raw[ 'on' + type ] = '';\r
 485                         if( !that._listeners ){\r
 486                                 X.Callback._correct( that._handleEvent );\r
 487                                 delete that._handleEvent;\r
 488                         };\r
 489                 });\r
 490 \r
 491 \r
 492 // handleEvent を拡張可能にするために、クロージャに移動した\r
 493 // Is this in regard to the Safari 1.x preventDefault bug on click/dblclick?\r
 494 // https://groups.google.com/forum/#!msg/comp.lang.javascript/uYEuCHjHxnw/yKoHtZJPa1QJ\r
 495 var x_eventdispatcher_actualHandleEvent =\r
 496         X.UA.IE4 || X.UA.IE5678 ? // ie45678 EVENT_IE & EVENT_DOM0 for ie4\r
 497                 (function(){\r
 498                         var ret;\r
 499                         \r
 500                         if( event.type === 'readystatechange' && this._tag && X.Dom.Event._LOAD_FIX_TAGS[ this._tag ] ){\r
 501                                 //type = 'readystatechange';\r
 502                         };\r
 503                         \r
 504                         ret = X.EventDispatcher.prototype.dispatch.call( this, new X.Dom.Event( event, this, this._rawObject ) );\r
 505 \r
 506                         if( ret & X.Callback.STOP_PROPAGATION ){\r
 507                                 event.cancelBubble = true;\r
 508                         };\r
 509                         if( ret & X.Callback.PREVENT_DEFAULT ){\r
 510                                 this._tag === 'A' && this._rawObject.blur();\r
 511                                 return event.returnValue = false;\r
 512                         };\r
 513                 }) :\r
 514         //X.Dom.EVENT_W3C & EVENT_DOM0\r
 515                 (function( e ){\r
 516                         var ret = X.EventDispatcher.prototype.dispatch.call( this, new X.Dom.Event( e, this ) );\r
 517                         \r
 518                         if( ret & X.Callback.STOP_PROPAGATION ){\r
 519                                 e.stopPropagation();\r
 520                         };\r
 521                         if( ret & X.Callback.PREVENT_DEFAULT ){\r
 522                                 this._tag === 'A' && this._rawObject.blur();\r
 523                                 e.preventDefault();\r
 524                                 if( X.UA.WebKit < 525.13 ){ // Safari3-\r
 525                                         if( e.type === 'click' || e.type === 'dbclick' ){\r
 526                                                 X.Dom._safariPreventDefault = true;\r
 527                                         };\r
 528                                 };\r
 529                                 return false;\r
 530                         };\r
 531                 });\r
 532 \r
 533 \r
 534 // イベントの退避、dom が画面から抜かれる場合に実施しておく\r
 535 X.EventDispatcher.prototype._migrateEvent = function(){\r
 536         var hash = this._listeners,\r
 537                 type;\r
 538         if( !hash ) return;\r
 539         for( type in hash ){\r
 540                 // 数字イベントの除外\r
 541                 '' + parseFloat( type ) !== type && x_eventdispatcher_actualRemoveEvent( this, type );\r
 542         };\r
 543 };\r
 544 \r
 545 // 退避したイベントの復帰\r
 546 X.EventDispatcher.prototype._restoreEvent = function(){\r
 547         var hash = this._listeners,\r
 548                 type;\r
 549         if( !hash ) return;\r
 550         for( type in hash ){\r
 551                 // 数字イベントの除外\r
 552                 '' + parseFloat( type ) !== type && x_eventdispatcher_actualAddEvent( this, type );\r
 553         };\r
 554 };\r
 555 \r
 556 \r
 557 console.log( 'X.Core.EventDispatcher' );\r