0.6.x/js/01_core/21_XViewPort.js

   1
   2 var X_ViewPort_readyState,
   3         X_ViewPort_active = ( window.parent === window ) || !window.parent, // parent は frameに読み込まれた場合のieのerror回避
   4         X_ViewPort_activeTimerID,
   5         X_ViewPort_rootElement,
   6         X_ViewPort_lock,
   7         X_ViewPort_width,
   8         X_ViewPort_height,
   9         X_ViewPort_scrollX = 0,
  10         X_ViewPort_scrollY = 0,
  11         X_ViewPort_baseFontSize,
  12         X_ViewPort_vScrollbarSize,
  13         X_ViewPort_hScrollbarSize,
  14
  15         X_ViewPort_useDetectionLoop = X_UA[ 'IE' ] < 9 || X_UA[ 'iOS' ],
  16         X_ViewPort_detectFontSize = !X_ViewPort_useDetectionLoop && function(){
  17                         var size = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
  18                         if( X_ViewPort_baseFontSize !== size ){
  19                                 X_ViewPort_baseFontSize = size;
  20                                 X_ViewPort_baseFontSize && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_BASE_FONT_RESIZED );
  21                         };
  22         },
  23
  24         X_ViewPort_orientationFlag,
  25         X_ViewPort_orientationchange = window[ 'orientation' ] !== undefined && function( e ){
  26                 X_ViewPort_orientationFlag = true;
  27                 !X_UA[ 'Android' ] && X_ViewPort_resize();
  28                 //console.log( '-- orientationchange : ' + X[ 'ViewPort' ][ 'getSize' ][ 0 ] + ' ' + X[ 'ViewPort' ][ 'getSize' ][ 1 ] );
  29         },
  30
  31         X_ViewPort_document = X_EventDispatcher( document ),
  32
  33 X_ViewPort = X_Class_override(
  34         X_EventDispatcher( window ),
  35         {
  36
  37                 'handleEvent' : function( e ){
  38                         var href, i, name, active = false, xnode;
  39
  40                         switch( e.type ){
  41                                 case 'beforeunload' :
  42                                         // ie では　a href='javascript' な要素でも beforeunload が起こる
  43                                         href = e.target && e.target[ 'attr' ] && e.target[ 'attr' ]( 'href' );
  44                                         if( X_Type_isString( href ) && !href.toLowerCase().indexOf( 'javascript:' ) ) return X_CALLBACK_PREVENT_DEFAULT | X_CALLBACK_STOP_PROPAGATION;
  45
  46                                         return X_ViewPort[ 'dispatch' ]( X_EVENT_BEFORE_UNLOAD );
  47
  48                                 case 'unload' :
  49                                         //https://developer.mozilla.org/ja/docs/Web/JavaScript/A_re-introduction_to_JavaScript
  50                                         //Firefox 1.5 の bfcache が無効になりますので、他に理由がない限り Firefox では unload リスナを登録するべきではないことに注意してください。
  51                                         X_ViewPort[ 'dispatch' ]( X_EVENT_UNLOAD );
  52                                         //alert('unload');
  53                                         X_ViewPort_document[ 'kill' ]();
  54                                         X_ViewPort[ 'kill' ]();
  55                                         //X_System[ 'dispatch' ]( X_EVENT_SHUT_DOWN );
  56                                         break;
  57
  58                                 case 'visibilitychange' :
  59                                         console.log( e.type + ':' + document[ 'hidden' ] );
  60                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = !document[ 'hidden' ] ) ? X_EVENT_VIEW_ACTIVATE : X_EVENT_VIEW_DEACTIVATE );
  61                                         break;
  62                                 case 'msvisibilitychange' :
  63                                         console.log( e.type + ':' + document[ 'msHidden' ] );
  64                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = !document[ 'msHidden' ] ) ? X_EVENT_VIEW_ACTIVATE : X_EVENT_VIEW_DEACTIVATE );
  65                                         break;
  66                                 case 'mozvisibilitychange' :
  67                                         console.log( e.type + ':' + document[ 'mozHidden' ] );
  68                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = !document[ 'mozHidden' ] ) ? X_EVENT_VIEW_ACTIVATE : X_EVENT_VIEW_DEACTIVATE );
  69                                         break;
  70                                 case 'webkitvisibilitychange' :
  71                                         console.log( e.type + ':' + document[ 'webkitHidden' ] );
  72                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = !document[ 'webkitHidden' ] ) ? X_EVENT_VIEW_ACTIVATE : X_EVENT_VIEW_DEACTIVATE );
  73                                         break;
  74
  75                                 case 'blur' :
  76                                 case 'focusout' :
  77                                         if( ( 5.5 < X_UA[ 'IE' ] && X_UA[ 'IE' ] < 9 )
  78                                                  ||
  79                                                  // TODO ie5... activeElement に障るとエラーになるため VBS 経由で activeElement に触り安全確認する(未確認)
  80                                                  ( 5 <= X_UA[ 'IE' ] && X_UA[ 'IE' ] < 5.5 && !window[ 'vbs_testAE' ]() )
  81                                          ){
  82                                                 xnode = X_Node_getXNode( document.activeElement );
  83                                                 if( xnode ){
  84                                                         xnode[ 'listenOnce' ]( [ 'focus', 'blur' ], X_ViewPort_detectFocusForIE );
  85                                                         //break;
  86                                                 };
  87                                                 if( X_ViewPort_activeTimerID ){
  88                                                         X_ViewPort_activeTimerID = X_Timer_remove( X_ViewPort_activeTimerID );
  89                                                 };
  90                                                 X_ViewPort_activeTimerID = X_Timer_once( 16, X_ViewPort_changeFocus );
  91                                                 return X_CALLBACK_PREVENT_DEFAULT | X_CALLBACK_STOP_PROPAGATION;
  92                                         };
  93                                         // 他の要素のfocusout がバブルアップしてきたもの
  94                                         if( e.target !== X_ViewPort_document ) break;
  95                                 case 'pagehide' :
  96                                         active = true;
  97                                 case 'focus' :
  98                                 case 'pageshow' :
  99                                 case 'focusin' :
 100                                         if( X_ViewPort_active === active ){
 101                                                 X_ViewPort_active = !active;
 102                                                 console.log( e.type + ':' + X_ViewPort_active );
 103                                                 X_ViewPort[ 'dispatch' ]( active ? X_EVENT_VIEW_DEACTIVATE : X_EVENT_VIEW_ACTIVATE );
 104                                         };
 105                                         break;
 106                         };
 107                 }
 108
 109         }
 110 );
 111
 112 function X_ViewPort_detectFocusForIE( e ){
 113         //console.log( 'iefix! ' + e.type + ':' + this.attr( 'tag' ) + ' isActive?:' + ( this[ '_rawObject' ] === document.activeElement ) );
 114         var elmActive = X_Script_try( X_Object_find, [ document, 'activeElement' ] );
 115         X_ViewPort_active = e.type === 'focus';
 116
 117
 118         if( elmActive && this[ '_rawObject' ] !== elmActive ){
 119                 this[ 'unlisten' ]( X_ViewPort_active ? 'blur' : 'focus', X_ViewPort_detectFocusForIE );
 120                 console.log( '>>>>>> activeElement 取得 不一致　' + this._tag );
 121         } else
 122         if( !elmActive ){
 123                 console.log( '******** activeElement 取得のエラー' );
 124         } else if( elmActive ){
 125                 console.log( '>>>>>> activeElement 取得' );
 126         };
 127
 128         if( X_ViewPort_activeTimerID ){
 129                 X_Timer_remove( X_ViewPort_activeTimerID );
 130         };
 131         X_ViewPort_activeTimerID = X_Timer_once( 16, X_ViewPort_changeFocus );
 132
 133         return X_CALLBACK_PREVENT_DEFAULT | X_CALLBACK_STOP_PROPAGATION;
 134 };
 135
 136 function X_ViewPort_changeFocus(){
 137         X_ViewPort[ 'dispatch' ]( X_ViewPort_active ? X_EVENT_VIEW_ACTIVATE : X_EVENT_VIEW_DEACTIVATE );
 138         X_ViewPort_activeTimerID = 0;
 139 };
 140
 141
 142 // TODO EventDispatcherProxy
 143 /**
 144  * window に相当する ViewPort 情報を提供するオブジェクト。
 145  * @namespace X.ViewPort
 146  * @alias X.ViewPort
 147  */
 148 X[ 'ViewPort' ] = {
 149         /**
 150          *
 151          * @alias X.ViewPort.listen
 152          */
 153         'listen' : function( type, arg1, arg2, arg3 ){
 154                 var f;
 155
 156                 if( type <= X_ViewPort_readyState ){
 157                         /*
 158                          * X_EVENT_XDOM_READY 以後に listen した場合の対策
 159                          */
 160                         X_ViewPort[ 'asyncDispatch' ]( type );
 161                 };
 162
 163                 f = X_Closure_classifyCallbackArgs( arg1, arg2, arg3 );
 164                 if( !f.cbKind ){
 165                         X_ViewPort[ 'listen' ]( type, this, arg1 );
 166                 } else
 167                 if( f.cbKind === X_CLOSURE_FUNC_ONLY ){
 168                         X_ViewPort[ 'listen' ]( type, this, f.func, f.supplement );
 169                 } else {
 170                         X_ViewPort[ 'listen' ]( type, arg1, arg2, arg3 );
 171                 };
 172                 return X[ 'ViewPort' ];
 173         },
 174
 175         /**
 176          *
 177          * @alias X.ViewPort.listenOnce
 178          */
 179         'listenOnce' : function( type, arg1, arg2, arg3 ){
 180                 var f;
 181
 182                 if( type <= X_ViewPort_readyState ){
 183                         /*
 184                          * X.Event.XDOM_READY 以後に listen した場合の対策
 185                          */
 186                         X_ViewPort[ 'asyncDispatch' ]( type );
 187                 };
 188
 189                 f = X_Closure_classifyCallbackArgs( arg1, arg2, arg3 );
 190                 if( !f.cbKind ){
 191                         X_ViewPort[ 'listenOnce' ]( type, this, arg1 );
 192                 } else
 193                 if( f.cbKind === X_CLOSURE_FUNC_ONLY ){
 194                         X_ViewPort[ 'listenOnce' ]( type, this, f.func, f.supplement );
 195                 } else {
 196                         X_ViewPort[ 'listenOnce' ]( type, arg1, arg2, arg3 );
 197                 };
 198                 return X[ 'ViewPort' ];
 199         },
 200
 201         /**
 202          *
 203          * @alias X.ViewPort.unlisten
 204          */
 205         'unlisten' : function( type, arg1, arg2, arg3 ){
 206                 var f = X_Closure_classifyCallbackArgs( arg1, arg2, arg3 );
 207
 208                 if( !f.cbKind ){
 209                         X_ViewPort[ 'unlisten' ]( type, this, arg1 );
 210                 } else
 211                 if( f.cbKind === X_CLOSURE_FUNC_ONLY ){
 212                         X_ViewPort[ 'unlisten' ]( type, this, f.func, f.supplement );
 213                 } else {
 214                         X_ViewPort[ 'unlisten' ]( type, arg1, arg2, arg3 );
 215                 };
 216                 return X[ 'ViewPort' ];
 217         },
 218
 219         /**
 220          *
 221          * @alias X.ViewPort.listening
 222          */
 223         'listening' : function( type, arg1, arg2, arg3 ){
 224                 var f = X_Closure_classifyCallbackArgs( arg1, arg2, arg3 );
 225
 226                 if( !f.cbKind ){
 227                         return X_ViewPort[ 'listening' ]( type, this, arg1 );
 228                 } else
 229                 if( f.cbKind === X_CLOSURE_FUNC_ONLY ){
 230                         return X_ViewPort[ 'listening' ]( type, this, f.func, f.supplement );
 231                 };
 232                 return X_ViewPort[ 'listening' ]( type, arg1, arg2, arg3 );
 233         },
 234
 235         /**
 236          * hammer のテストファイルだけが使用
 237          * @alias X.ViewPort.asyncDispatch
 238          */
 239         'asyncDispatch' : function(){
 240                 return X_ViewPort[ 'asyncDispatch' ].apply( X_ViewPort, arguments );
 241         },
 242
 243         'getPointerPosition' : function(){
 244
 245         },
 246
 247         /* 要素が視界に入った  http://remysharp.com/2009/01/26/element-in-view-event-plugin/
 248          * TODO -> Node.call('inView')
 249          */
 250         'inView' : function( elm ){
 251
 252         },
 253
 254         /**
 255          *
 256          * @alias X.ViewPort.getSize
 257          */
 258         'getSize' : function(){
 259                 return [ X_ViewPort_width, X_ViewPort_height ];
 260         },
 261 //https://developer.mozilla.org/en-US/docs/Web/API/Element.getBoundingClientRect
 262 //use window.pageXOffset and window.pageYOffset instead of window.scrollX and window.scrollY
 263 //(((t = document.documentElement) || (t = X_elmBody.parentNode)) && typeof t.ScrollLeft == 'number' ? t : X_elmBody).ScrollLeft;
 264 //(((t = document.documentElement) || (t = X_elmBody.parentNode)) && typeof t.ScrollTop == 'number' ? t : X_elmBody).ScrollTop
 265
 266         // TODO X.Doc へ
 267         /**
 268          * @alias X.ViewPort.getDocumentSize
 269          */
 270         'getDocumentSize' : function(){
 271                 // Opera は互換モードでは document.body.scrollHeight、標準モードでは document.documentElement.scrollHeight でページの高さが取れる。と思ってたんだけど、例外があった。
 272                 // http://orera.g.hatena.ne.jp/edvakf/20100515/1273908051
 273         //http://onozaty.hatenablog.com/entry/20060803/p1
 274         // Safari2.0.4では標準・互換どちらも document.body
 275         // http://hisasann.com/housetect/2008/08/jqueryheightwidthopera95.html このdocument.body[ "client" + name ]はおそらくOpera9.5未満のバージョンで有効なんじゃないかな？
 276
 277                 X_Node_updateTimerID && X_Node_startUpdate();
 278                 /*X_UA[ 'Opera' ] ?
 279                         ( document.documentElement && document.documentElement.clientWidth ?
 280                                 new Function( 'return[document.documentElement.clientWidth,document.documentElement.clientHeight]' ) :
 281                                 new Function( 'return[X_elmBody.clientWidth,X_elmBody.clientHeight]' )
 282                         ) :*/
 283                 return [
 284                         X_ViewPort_rootElement.scrollWidth  || X_ViewPort_rootElement.offsetWidth,
 285                         X_ViewPort_rootElement.scrollHeight || X_ViewPort_rootElement.offsetHeight
 286                 ];
 287         },
 288
 289         /**
 290          *
 291          * @alias X.ViewPort.getScrollPosition
 292          */
 293         'getScrollPosition' :
 294                 window.pageXOffset !== undefined ?
 295                         ( function(){
 296                                 X_Node_updateTimerID && X_Node_startUpdate();
 297                                 return[ X_ViewPort_scrollX = window.pageXOffset, X_ViewPort_scrollY = window.pageYOffset ];
 298                         } ) :
 299                 window.scrollLeft  !== undefined ?
 300                         ( function(){
 301                                 X_Node_updateTimerID && X_Node_startUpdate();
 302                                 return[ X_ViewPort_scrollX = window.scrollLeft, X_ViewPort_scrollY = window.scrollTop ];
 303                         } ) :
 304                         ( function(){
 305                                 X_Node_updateTimerID && X_Node_startUpdate();
 306                                 // body は Safari2-
 307                                 return[ X_ViewPort_scrollX = X_ViewPort_rootElement.scrollLeft || X_elmBody.scrollLeft, X_ViewPort_scrollY = X_ViewPort_rootElement.scrollTop || X_elmBody.scrollTop ];
 308                         } ),
 309
 310         /**
 311          *
 312          * @alias X.ViewPort.getScrollbarSize
 313          */
 314         'getScrollbarSize' : function(){
 315                 return [ X_ViewPort_vScrollbarSize, X_ViewPort_hScrollbarSize ];
 316         },
 317
 318         /**
 319          *
 320          * @alias X.ViewPort.getBaseFontSize
 321          */
 322         'getBaseFontSize' : function(){
 323                 if( X_Node_updateTimerID ){
 324                         X_Node_startUpdate();
 325                         return X_ViewPort_baseFontSize = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 326                 };
 327                 return X_ViewPort_baseFontSize;
 328         },
 329
 330         /**
 331          * キーボードイベントを受け付ける
 332          * @alias X.ViewPort.isActive
 333          */
 334         'isActive' : function(){
 335                 return X_ViewPort_active;
 336         },
 337
 338         /**
 339          * 可視である。iframe 内のhtmlも
 340          * @alias X.ViewPort.isVisible
 341          */
 342         'isVisible' : function(){
 343                 return X_ViewPort_active;
 344         }
 345
 346 };
 347
 348
 349
 350 /* -----------------------------------------------
 351  * Resize
 352  *  original : uupaa.js
 353  *
 354  * TODO
 355  *  https://w3g.jp/blog/studies/ios7_1_minimal-ui_warning
 356  *  iOS7.0からあったiPad Safariの高さ100%コンテンツでlandscape（横向き）時に起きる不具合
 357  *
 358  * http://looxu.blogspot.jp/2013/11/ios7mobile-safariwindowinnerheight.html
 359  * iOS7にて、Mobile Safariのwindow.innerHeightを正しく取得する方法
 360  *
 361  *  http://tenderfeel.xsrv.jp/javascript/1182/
 362  *  アドレスバーの高さの算出
 363  *
 364  * http://sssslide.com/www.slideshare.net/hiroakiwakamatsu/javascript-14514208
 365  * 1. 傾き時の画面サイズ取得ー 対処方法の例
 366  * (1)ー? タイマーを使って、画面サイズ取得の タイミングを少しだけ遅延させる
 367  * window.onorientationchange = function() { setTimeout(function() { alert('W: ' + window.innerWidth + ', H: ' + window.innerHeight); }, 200); }
 368  * 横に傾けた時、正常に横向け時の 幅と高さが取得できている ただし、端末によってはうまく取得できな い場合がある(Galaxy S IIIとか・・・) 7
 369  *
 370  * http://sssslide.com/www.slideshare.net/hiroakiwakamatsu/ss-12718639
 371  *
 372  *
 373  * getBoundingClientRect で　fontsize の調査
 374  */
 375                 var X_ViewPort_resize =
 376                         // iOS もループで回す,,,iOS3.1.3, iOS6 で確認
 377                         X_ViewPort_useDetectionLoop ?
 378                                 (function(){
 379                                         var size;
 380                                         if( !X_ViewPort_lock ){
 381                                                 size = X_ViewPort_getWindowSize();
 382                                                 if( X_ViewPort_width !== size[ 0 ] || X_ViewPort_height !== size[ 1 ] ){
 383                                                         X_ViewPort_width = size[ 0 ];
 384                                                         X_ViewPort_height = size[ 1 ];
 385                                                         X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 386                                                         X_ViewPort_lock = true;
 387                                                 };
 388                                         };
 389
 390                                         size = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 391                                         if( X_ViewPort_baseFontSize !== size ){
 392                                                 X_ViewPort_baseFontSize && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_BASE_FONT_RESIZED );
 393                                                 X_ViewPort_baseFontSize = size;
 394                                         };
 395
 396                                 }) :
 397                                 (function( e ){
 398                                         console.log( '-- resize : ' + X_Timer_now() );
 399
 400                                         !X_ViewPort_lock && ( X_ViewPort_lock = true ) && X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 401                                         return X_CALLBACK_PREVENT_DEFAULT | X_CALLBACK_STOP_PROPAGATION;
 402                                 });
 403
 404                 function X_ViewPort_detectFinishResizing(){
 405                         var size = X_ViewPort_getWindowSize();
 406                         if( X_ViewPort_width !== size[ 0 ] || X_ViewPort_height !== size[ 1 ] ){
 407                                 X_ViewPort_width  = size[ 0 ];
 408                                 X_ViewPort_height = size[ 1 ];
 409                                 X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 410                         } else {
 411                                 console.log( '-- detectFinishResizing : ' + X_Timer_now() );
 412
 413                                 X_ViewPort[ 'asyncDispatch' ]( X_EVENT_VIEW_RESIZED );
 414                                 X_ViewPort_lock = false;
 415                                 if( X_ViewPort_orientationFlag ){
 416                                         X_ViewPort_orientationFlag = false;
 417                                         X_ViewPort[ 'asyncDispatch' ]( 100, { type : X_EVENT_VIEW_TURNED, 'orientation' : window.orientation } );
 418                                 };
 419                         };
 420                 };
 421
 422                 X_TEMP.onDomContentLoaded = function(){
 423                         var html, head, body;
 424
 425                         console.log( '> X_TEMP.onDomContentLoaded rs:' + X_ViewPort_readyState );
 426
 427                         if( X_EVENT_PRE_INIT <= X_ViewPort_readyState ) return X_CALLBACK_UN_LISTEN;
 428                         X_ViewPort_readyState = X_EVENT_PRE_INIT;
 429
 430                         // DOMContentLoaded の無いブラウザで X_TEMP.onDomContentLoaded への参照が残り続けるのを回避
 431                         X_TEMP.onDomContentLoaded && X_ViewPort_document[ 'unlisten' ]( 'DOMContentLoaded', X_TEMP.onDomContentLoaded );
 432                         delete X_TEMP.onDomContentLoaded;
 433
 434                         X_elmBody = document.body;
 435
 436                         X_ViewPort_rootElement = document.compatMode !== 'CSS1Compat' ? X_elmBody : X_elmHtml || X_elmBody;
 437
 438         /**
 439          * X.Node( documentElement )
 440          * @alias X.Doc.html
 441          * @type {Node}
 442          */
 443                         X[ 'Doc' ][ 'html' ] = html = X_Node_html = X_elmHtml && Node( X_elmHtml )[ 'removeClass' ]( 'js-disabled' )[ 'addClass' ]( X_UA_classNameForHTML.split( '.' ).join( '_' ) );
 444                         html[ '_flags' ] |= X_NodeFlags_IN_TREE;
 445
 446         /**
 447          * X.Node( head )
 448          * @alias X.Doc.head
 449          * @type {Node}
 450          */
 451                         X[ 'Doc' ][ 'head' ] = head = X_Node_head = X_elmHead && Node( X_elmHead );
 452
 453         /**
 454          * X.Node( body )
 455          * @alias X.Doc.body
 456          * @type {Node}
 457          */
 458                         X[ 'Doc' ][ 'body' ] = body = X_Node_body = Node( X_elmBody );
 459
 460                         body[ 'parent ' ] = head[ 'parent' ] = html;
 461                         html[ '_xnodes' ] = [ head, body ];
 462
 463                         html[ 'appendTo' ] = html[ 'prev' ] = html[ 'next' ] = html[ 'clone' ] = html[ 'remove' ] = html[ 'kill' ] =
 464                         html[ 'create' ] = html[ 'createText' ] = html[ 'createAt' ] = html[ 'createTextAt' ] = html[ 'append' ] = html[ 'appendAt' ] = html[ 'empty' ] = html[ 'html' ] = html[ 'text' ] =
 465                         html[ 'css' ] = html[ 'cssText' ] =
 466                         head[ 'appendTo' ] = head[ 'prev' ] = head[ 'clone' ] = head[ 'remove' ] = head[ 'kill' ] =
 467                         head[ 'createText' ] = head[ 'createTextAt' ] = head[ 'empty' ] = head[ 'html' ] = head[ 'text' ] = head[ 'css' ] = head[ 'cssText' ] =
 468                         body[ 'appendTo' ] = body[ 'next' ] = body[ 'clone' ] = body[ 'remove' ] = body[ 'kill' ] = new Function( 'return this' );
 469
 470                         X_ViewPort[ 'listenOnce' ]( X_EVENT_PRE_INIT, function(){
 471                                 X_ViewPort_readyState = X_EVENT_XTREE_READY;
 472                                 !X_TEMP.X_Dom_useBuilder && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_XTREE_READY );
 473                         } );
 474
 475                         X_ViewPort[ 'listenOnce' ]( X_EVENT_XTREE_READY, function(){
 476                                 X_ViewPort_readyState = X_EVENT_INIT;
 477                                 //X_UA[ 'Opera7' ] && alert( 'bc' );
 478                                 X_Node_body[ 'appendAt' ]( 0,
 479                                         X_Node_systemNode = X_Doc_create( 'div', { 'class' : 'hidden-system-node' } ),
 480                                         X_Node_fontSizeNode = X_Doc_create( 'div', { 'class' : 'hidden-system-node' } )[ 'cssText' ]( 'line-height:1;height:1em;' )[ 'text' ]( 'X' )
 481                                 );
 482                                 X_Node_startUpdate();
 483
 484                                 X_ViewPort[ 'asyncDispatch' ]( X_EVENT_INIT );
 485                         } );
 486
 487                         X_ViewPort[ 'listenOnce' ]( X_EVENT_INIT, function(){
 488                                 var size = X_ViewPort_getWindowSize(),
 489
 490                                 // http://jsdo.it/imaya/kTYg
 491                                         defaultOverflow = X_elmBody.style.overflow,
 492                                         w, h;
 493
 494                                 X_ViewPort_width  = size[ 0 ];
 495                                 X_ViewPort_height = size[ 1 ];
 496
 497                                 X_elmBody.style.overflow = 'hidden';
 498                                 w = X_elmBody.clientWidth;
 499                                 h = X_elmBody.clientHeight;
 500
 501                                 X_elmBody.style.overflow = 'scroll';
 502                                 w -= X_elmBody.clientWidth;
 503                                 h -= X_elmBody.clientHeight;
 504
 505                                 if( !w ) w = X_elmBody.offsetWidth  - X_elmBody.clientWidth;
 506                                 if( !h ) h = X_elmBody.offsetHeight - X_elmBody.clientHeight;
 507                                 X_elmBody.style.overflow = defaultOverflow;
 508
 509                                 X_ViewPort_vScrollbarSize = w;
 510                                 X_ViewPort_hScrollbarSize = h;
 511                                 if( h <= 0 ){ // ie6, ie11, firefox で　負の値が返る
 512                                         console.log( 'invalid hScrollbarSize: ' + h );
 513                                         X_ViewPort_hScrollbarSize = w;
 514                                 };
 515
 516                                 //
 517                                 if( X_ViewPort_orientationchange ){
 518                                         X_ViewPort[ 'listen' ]( 'orientationchange', X_ViewPort_orientationchange );
 519                                 };
 520
 521                                 if( X_ViewPort_detectFontSize ){
 522                                         X_ViewPort[ 'listen' ]( 'resize', X_ViewPort_resize );
 523                                         X_Timer_add( 333, X_ViewPort_detectFontSize );
 524                                 } else {
 525                                         X_Timer_add( 333, X_ViewPort_resize );
 526                                 };
 527
 528                                 X_ViewPort_baseFontSize = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 529
 530                                 X_ViewPort[ 'asyncDispatch' ]( X_ViewPort_readyState = X_EVENT_XDOM_READY );
 531                         } );
 532
 533                         if( X_TEMP.X_Dom_useBuilder ) X_TEMP.X_Dom_useBuilder = !!X_elmBody.children.length;
 534                         X_ViewPort[ 'asyncDispatch' ]( X_EVENT_PRE_INIT );
 535
 536                         X_ViewPort[ 'listen' ]( [ 'beforeunload', 'unload' ] );
 537
 538                 //ブラウザの戻るボタンで戻ったときに呼ばれるイベントとかキャッシュとかそこらへんのこと
 539                 //http://d.hatena.ne.jp/koumiya/20080916/1221580149
 540
 541                         if( document[ 'webkitHidden' ] !== undefined ){
 542                                 X_ViewPort_document[ 'listen' ]( 'webkitvisibilitychange', X_ViewPort );
 543                         } else
 544                         if( document[ 'hidden' ] !== undefined ){// iOS 7+
 545                                 X_ViewPort_document[ 'listen' ]( 'visibilitychange', X_ViewPort );
 546                         } else
 547                         if( document[ 'msHidden' ] !== undefined ){
 548                                 X_ViewPort_document[ 'listen' ]( 'msvisibilitychange', X_ViewPort );
 549                         } else
 550                         if( document[ 'mozHidden' ] !== undefined ){
 551                                 X_ViewPort_document[ 'listen' ]( 'mozvisibilitychange', X_ViewPort );
 552                         };
 553
 554                         if( window[ 'onpageshow' ] !== undefined ){
 555                                 X_ViewPort[ 'listen' ]( [ 'pageshow', 'pagehide' ] );
 556                         };
 557
 558                         if( document[ 'onfocusin' ] !== undefined ){
 559                                 // https://github.com/ai/visibilityjs/blob/master/lib/visibility.fallback.js
 560                                 X_ViewPort_document[ 'listen' ]( [ 'focusin', 'focusout' ], X_ViewPort );
 561                         };
 562
 563                         X_ViewPort[ 'listen' ]( [ 'focus', 'blur' ] );
 564
 565                         return X_CALLBACK_UN_LISTEN;
 566                 };
 567
 568                 function X_ViewPort_getWindowSize(){
 569                         return X_UA[ 'IE' ] ? // Opera10.1 では ズーム時に表示領域のサイズが取れない！
 570                                 [ X_ViewPort_rootElement.clientWidth, X_ViewPort_rootElement.clientHeight ] :
 571                                 X_UA[ 'Opera' ] < 12 ? // Opera10.1 では ズーム + resize 時に表示領域のサイズが取れない！
 572                                 [ X_ViewPort_rootElement.offsetWidth, X_ViewPort_rootElement.offsetHeight ] :
 573                                 [ window.innerWidth, window.innerHeight ];
 574                 };
 575
 576
 577 console.log( 'X.Dom dom:w3c=' + X_UA_DOM.W3C + ' ev:w3c=' + X_UA_EVENT.W3C );
 578
 579 /* -----------------------------------------------
 580  * Document Ready
 581  *  Dean Edwards/Matthias Miller/John Resig
 582  */
 583
 584 // SafariでJavaScriptのデバッグをする方法
 585 // safari1.3 可
 586 // http://shimax.cocolog-nifty.com/search/2006/09/safarijavascrip_c54d.html
 587
 588 /* for ie9+/Mozilla/Opera9 */
 589 if( X_UA_EVENT.W3C ){
 590         X_ViewPort_document[ 'listenOnce' ]( 'DOMContentLoaded', X_TEMP.onDomContentLoaded );
 591 } else
 592 if( 6 <= X_UA[ 'IE' ] && X[ 'inHead' ] /* && !X_UA[ 'ieExeComError' ] */ ){ // standalone の除外 ->  && !X_UA[ 'ieExeComError' ]
 593         // if this script in Head
 594         //document.write( '<script id=__ieonload defer src=javascript:void(0)></script>' );
 595         //X_TEMP._script = document.getElementById( '__ieonload' );
 596
 597         // 上のコードはスタンドアローン版ie6でエラー
 598     X_TEMP._script = document.createElement( '<script id=__ieonload defer src=javascript:void(0)></script>' );
 599     X_elmHead.appendChild( X_TEMP._script );
 600
 601         X_TEMP._script.onreadystatechange = function(){
 602                 var s = X_TEMP._script;
 603                 if( s && s.readyState === 'complete' ){
 604                         s.onreadystatechange = X_emptyFunction;
 605                         s.onreadystatechange = null;
 606                         s.removeNode( true );
 607                         delete X_TEMP._script;
 608                         X_TEMP.onDomContentLoaded && X_TEMP.onDomContentLoaded();
 609                 };
 610         };
 611 };
 612 // Re: onLoad doesn't work with Safari?
 613 // http://lists.apple.com/archives/web-dev/2003/Oct/msg00036.html
 614 if( X_UA[ 'WebKit' ] || X_UA[ 'Safari' ]  < 3 ){ // sniff
 615         X_Timer_add( 16, function(){
 616                 if( !X_TEMP.onDomContentLoaded ) return X_CALLBACK_UN_LISTEN;
 617                 if( document.readyState === 'loaded' || document.readyState === 'complete' ) return X_TEMP.onDomContentLoaded();
 618         });
 619 };
 620
 621 /* for other browsers */
 622 X_ViewPort[ 'listenOnce' ]( 'load', X_TEMP.onDomContentLoaded );