0.6.x/js/01_core/16_XViewPort.js

   1
   2 var X_ViewPort_readyState,
   3         X_ViewPort_active = !!window.parent || !!document.activeElement, // parent は frameに読み込まれた場合のieのerror回避
   4         X_ViewPort_rootElement,
   5         X_ViewPort_lock,
   6         X_ViewPort_width,
   7         X_ViewPort_height,
   8         X_ViewPort_baseFontSize,
   9         X_ViewPort_vScrollbarSize,
  10         X_ViewPort_hScrollbarSize,
  11
  12         X_ViewPort_useDetectionLoop = X_UA[ 'IE' ] < 9 || X_UA[ 'iOS' ],
  13         X_ViewPort_detectFontSize = !X_ViewPort_useDetectionLoop && function(){
  14                         var size = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
  15                         if( X_ViewPort_baseFontSize !== size ){
  16                                 X_ViewPort_baseFontSize = size;
  17                                 X_ViewPort_baseFontSize && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_BASE_FONT_RESIZED );
  18                         };
  19         },
  20
  21         X_ViewPort_orientationFlag,
  22         X_ViewPort_orientationchange = window[ 'orientation' ] !== undefined && function( e ){
  23                 X_ViewPort_orientationFlag = true;
  24                 !X_UA[ 'Android' ] && X_ViewPort_resize();
  25                 //console.log( '-- orientationchange : ' + X[ 'ViewPort' ][ 'getSize' ][ 0 ] + ' ' + X[ 'ViewPort' ][ 'getSize' ][ 1 ] );
  26         },
  27
  28         X_ViewPort_document = X_EventDispatcher( document ),
  29
  30 X_ViewPort = X_Class_override(
  31         X_EventDispatcher( window ),
  32         {
  33
  34                 'handleEvent' : function( e ){
  35                         var href, i, name;
  36
  37                         switch( e.type ){
  38                                 case 'beforeunload' :
  39                                         // ie では　a href="javascript" な要素でも beforeunload が起こる
  40                                         href = e.target && e.target[ 'attr' ] && e.target[ 'attr' ]( 'href' );
  41                                         if( href && href.indexOf && href.indexOf( 'javascript:' ) === 0 ) return X_Callback_PREVENT_DEFAULT | X_Callback_STOP_PROPAGATION;
  42
  43                                         return X_ViewPort[ 'dispatch' ]( X_EVENT_BEFORE_UNLOAD );
  44
  45                                 case 'unload' :
  46                                         X_ViewPort[ 'dispatch' ]( X_EVENT_UNLOAD );
  47                                 //alert('unload');
  48                                         X_ViewPort_document[ 'kill' ]();
  49                                         this[ 'kill' ]();
  50
  51                                         //X_System[ 'dispatch' ]( X_EVENT_SHUT_DOWN );
  52                                         break;
  53
  54                                 case 'visibilitychange' :
  55                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = document[ 'hidden' ] ) ? X_EVENT_VIEW_DEACTIVATE : X_EVENT_VIEW_ACTIVATE );
  56                                         break;
  57                                 case 'mozvisibilitychange' :
  58                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = document[ 'mozHidden' ] ) ? X_EVENT_VIEW_DEACTIVATE : X_EVENT_VIEW_ACTIVATE );
  59                                         break;
  60                                 case 'webkitvisibilitychange' :
  61                                         X_ViewPort[ 'dispatch' ]( ( X_ViewPort_active = document[ 'webkitHidden' ] ) ? X_EVENT_VIEW_DEACTIVATE : X_EVENT_VIEW_ACTIVATE );
  62                                         break;
  63
  64                                 case 'pageshow' :
  65                                 case 'focus' :
  66                                         if( !X_ViewPort_active ){
  67                                                 X_ViewPort_active = true;
  68                                                 X_ViewPort[ 'dispatch' ]( X_EVENT_VIEW_ACTIVATE );
  69                                         };
  70                                         break;
  71
  72                                 case 'pagehide' :
  73                                 case 'blur' :
  74                                         if( X_ViewPort_active ){
  75                                                 X_ViewPort_active = false;
  76                                                 X_ViewPort[ 'dispatch' ]( X_EVENT_VIEW_DEACTIVATE );
  77                                         };
  78                                         break;
  79                         };
  80                 }
  81
  82         }
  83 );
  84
  85
  86 /**
  87  * window に相当する ViewPort 情報を提供するオブジェクト。
  88  * @namespace X.ViewPort
  89  * @alias X.ViewPort
  90  */
  91 X[ 'ViewPort' ] = {
  92
  93         'listen' : function( type, arg1, arg2, arg3 ){
  94                 if( type <= X_ViewPort_readyState ){
  95                         /*
  96                          * X_EVENT_XDOM_READY 以後に listen した場合の対策
  97                          */
  98                         X_ViewPort[ 'asyncDispatch' ]( type );
  99                 };
 100                 // ie8-では keydown -> documentへ
 101                 type && arg1 && X_ViewPort[ 'listen' ]( type, arg1, arg2, arg3 );
 102                 return X[ 'ViewPort' ];
 103         },
 104
 105
 106         'listenOnce' : function( type, arg1, arg2, arg3 ){
 107                 if( type <= X_ViewPort_readyState ){
 108                         /*
 109                          * X.Event.XDOM_READY 以後に listen した場合の対策
 110                          */
 111                         X_ViewPort[ 'asyncDispatch' ]( type );
 112                 };
 113                 type && arg1 && X_ViewPort[ 'listenOnce' ]( type, arg1, arg2, arg3 );
 114                 return X[ 'ViewPort' ];
 115         },
 116
 117         'unlisten' : function( type, arg1, arg2, arg3 ){
 118                 type && arg1 && X_ViewPort[ 'unlisten' ]( type, arg1, arg2, arg3 );
 119                 return X[ 'ViewPort' ];
 120         },
 121
 122         'listening' : function( type, arg1, arg2, arg3 ){
 123                 return X_ViewPort[ 'listening' ]( type, arg1, arg2, arg3 );
 124         },
 125
 126         // hammer のテストファイルだけが使用
 127         'asyncDispatch' : function(){
 128                 return X_ViewPort[ 'asyncDispatch' ].apply( X_ViewPort, arguments );
 129         },
 130
 131         'getPointerPosition' : function(){
 132
 133         },
 134
 135         /* 要素が視界に入った  http://remysharp.com/2009/01/26/element-in-view-event-plugin/
 136          * TODO -> Node.call('inView')
 137          */
 138         'inView' : function( elm ){
 139
 140         },
 141
 142         'getSize' : function(){
 143                 return [ X_ViewPort_width, X_ViewPort_height ];
 144         },
 145 //https://developer.mozilla.org/en-US/docs/Web/API/Element.getBoundingClientRect
 146 //use window.pageXOffset and window.pageYOffset instead of window.scrollX and window.scrollY
 147 //(((t = document.documentElement) || (t = document.body.parentNode)) && typeof t.ScrollLeft == 'number' ? t : document.body).ScrollLeft;
 148 //(((t = document.documentElement) || (t = document.body.parentNode)) && typeof t.ScrollTop == 'number' ? t : document.body).ScrollTop
 149
 150         'getDocumentSize' : function(){
 151                 // 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。
 152                 // http://orera.g.hatena.ne.jp/edvakf/20100515/1273908051
 153         //http://onozaty.hatenablog.com/entry/20060803/p1
 154         // Safari2.0.4では標準・互換どちらも document.body
 155
 156                 X_Node_updateTimerID && X_Node_startUpdate();
 157                 /*X_UA[ 'Opera' ] ?
 158                         ( document.documentElement && document.documentElement.clientWidth ?
 159                                 new Function( 'return[document.documentElement.clientWidth,document.documentElement.clientHeight]' ) :
 160                                 new Function( 'return[document.body.clientWidth,document.body.clientHeight]' )
 161                         ) :*/
 162                 return [
 163                         X_ViewPort_rootElement.scrollWidth  || X_ViewPort_rootElement.offsetWidth,
 164                         X_ViewPort_rootElement.scrollHeight || X_ViewPort_rootElement.offsetHeight
 165                 ];
 166         },
 167
 168         'getScrollPosition' :
 169                 window.pageXOffset !== undefined ?
 170                         ( function(){
 171                                 X_Node_updateTimerID && X_Node_startUpdate();
 172                                 return[ window.pageXOffset, window.pageYOffset ];
 173                         } ) :
 174                 window.scrollLeft  !== undefined ?
 175                         ( function(){
 176                                 X_Node_updateTimerID && X_Node_startUpdate();
 177                                 return[ window.scrollLeft, window.scrollTop ];
 178                         } ) :
 179                         ( function(){
 180                                 X_Node_updateTimerID && X_Node_startUpdate();
 181                                 // body は Safari2-
 182                                 return[ X_ViewPort_rootElement.scrollLeft || document.body.scrollLeft, X_ViewPort_rootElement.scrollTop || document.body.scrollTop ];
 183                         } ),
 184
 185         'getScrollbarSize' : function(){
 186                 return [ X_ViewPort_vScrollbarSize, X_ViewPort_hScrollbarSize ];
 187         },
 188
 189         'getBaseFontSize' : function(){
 190                 if( X_Node_updateTimerID ){
 191                         X_Node_startUpdate();
 192                         return X_ViewPort_baseFontSize = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 193                 };
 194                 return X_ViewPort_baseFontSize;
 195         }
 196
 197 };
 198
 199
 200
 201 /* -----------------------------------------------
 202  * Resize
 203  *  original : uupaa.js
 204  *
 205  * TODO
 206  *  https://w3g.jp/blog/studies/ios7_1_minimal-ui_warning
 207  *  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
 208  *
 209  * http://looxu.blogspot.jp/2013/11/ios7mobile-safariwindowinnerheight.html
 210  * iOS7にて、Mobile Safariのwindow.innerHeightを正しく取得する方法
 211  *
 212  *  http://tenderfeel.xsrv.jp/javascript/1182/
 213  *  アドレスバーの高さの算出
 214  *
 215  * http://sssslide.com/www.slideshare.net/hiroakiwakamatsu/javascript-14514208
 216  * 1. 傾き時の画面サイズ取得ー 対処方法の例
 217  * (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
 218  * window.onorientationchange = function() { setTimeout(function() { alert("W: " + window.innerWidth + ", H: " + window.innerHeight); }, 200); }
 219  * 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
 220  *
 221  * http://sssslide.com/www.slideshare.net/hiroakiwakamatsu/ss-12718639
 222  *
 223  *
 224  * getBoundingClientRect で　fontsize の調査
 225  */
 226                 var X_ViewPort_resize =
 227                         // iOS もループで回す,,,iOS3.1.3, iOS6 で確認
 228                         X_ViewPort_useDetectionLoop ?
 229                                 (function(){
 230                                         var size;
 231                                         if( !X_ViewPort_lock ){
 232                                                 size = X_ViewPort_getWindowSize();
 233                                                 if( X_ViewPort_width !== size[ 0 ] || X_ViewPort_height !== size[ 1 ] ){
 234                                                         X_ViewPort_width = size[ 0 ];
 235                                                         X_ViewPort_height = size[ 1 ];
 236                                                         X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 237                                                         X_ViewPort_lock = true;
 238                                                 };
 239                                         };
 240
 241                                         size = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 242                                         if( X_ViewPort_baseFontSize !== size ){
 243                                                 X_ViewPort_baseFontSize && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_BASE_FONT_RESIZED );
 244                                                 X_ViewPort_baseFontSize = size;
 245                                         };
 246
 247                                 }) :
 248                                 (function( e ){
 249                                         console.log( '-- resize : ' + X_Timer_now() );
 250
 251                                         !X_ViewPort_lock && ( X_ViewPort_lock = true ) && X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 252                                         return X_Callback_PREVENT_DEFAULT | X_Callback_STOP_PROPAGATION;
 253                                 });
 254
 255                 function X_ViewPort_detectFinishResizing(){
 256                         var size = X_ViewPort_getWindowSize();
 257                         if( X_ViewPort_width !== size[ 0 ] || X_ViewPort_height !== size[ 1 ] ){
 258                                 X_ViewPort_width  = size[ 0 ];
 259                                 X_ViewPort_height = size[ 1 ];
 260                                 X_Timer_once( 100, X_ViewPort_detectFinishResizing );
 261                         } else {
 262                                 console.log( '-- detectFinishResizing : ' + X_Timer_now() );
 263
 264                                 X_ViewPort[ 'asyncDispatch' ]( X_EVENT_VIEW_RESIZED );
 265                                 X_ViewPort_lock = false;
 266                                 if( X_ViewPort_orientationFlag ){
 267                                         X_ViewPort_orientationFlag = false;
 268                                         X_ViewPort[ 'asyncDispatch' ]( 100, { type : X_EVENT_VIEW_TURNED, 'orientation' : window.orientation } );
 269                                 };
 270                         };
 271                 };
 272
 273                 X_TEMP.onDomContentLoaded = function(){
 274                         var s, size, elmHtml, elmHead, elmBody, html, head, body;
 275
 276                         console.log( '> X_TEMP.onDomContentLoaded rs:' + X_ViewPort_readyState );
 277
 278                         if( X_EVENT_PRE_INIT <= X_ViewPort_readyState ) return X_Callback_UN_LISTEN;
 279                         X_ViewPort_readyState = X_EVENT_PRE_INIT;
 280
 281                         // 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
 282                         X_TEMP.onDomContentLoaded && X_ViewPort_document[ 'unlisten' ]( 'DOMContentLoaded', X_TEMP.onDomContentLoaded );
 283                         delete X_TEMP.onDomContentLoaded;
 284
 285                         elmHtml = document.documentElement ||
 286                                 X_UA_DOM.W3C ? document.getElementsByTagName( 'html' )[ 0 ] :
 287                                 X_UA_DOM.IE4 ? document.all.tags( 'html' )[ 0 ] : null;
 288
 289                         elmHead =
 290                                 X_UA_DOM.W3C ? document.getElementsByTagName( 'head' )[ 0 ] :
 291                                 X_UA_DOM.IE4 ? document.all.tags( 'head' )[ 0 ] : null;
 292
 293                         elmBody = document.body;
 294
 295                         X_ViewPort_rootElement = document.compatMode !== 'CSS1Compat' ? elmBody : elmHtml || elmBody;
 296
 297                         html = X[ 'Doc' ][ 'html' ] = X_Node_html = elmHtml && new Node( elmHtml )[ 'removeClass' ]( 'js-disabled' )[ 'addClass' ]( X_UA_classNameForHTML );
 298                         html[ '_flags' ] |= X_Node_State.IN_TREE;
 299
 300                         head = X[ 'Doc' ][ 'head' ] = X_Node_head = elmHead && new Node( elmHead );
 301
 302                         body = X[ 'Doc' ][ 'body' ] = X_Node_body = new Node( elmBody );
 303
 304                         body[ 'parent ' ] = head[ 'parent' ] = html;
 305                         html[ '_xnodes' ] = [ head, body ];
 306
 307                         html[ 'appendTo' ] = html[ 'prev' ] = html[ 'next' ] = html[ 'clone' ] = html[ 'remove' ] = html[ 'destroy' ] =
 308                         html[ 'create' ] = html[ 'createText' ] = html[ 'createAt' ] = html[ 'createTextAt' ] = html[ 'append' ] = html[ 'appendAt' ] = html[ 'empty' ] = html[ 'html' ] = html[ 'text' ] =
 309                         html[ 'css' ] = html[ 'cssText' ] =
 310                         head[ 'appendTo' ] = head[ 'prev' ] = head[ 'next' ] = head[ 'clone' ] = head[ 'remove' ] = head[ 'destroy' ] =
 311                         head[ 'createText' ] = head[ 'createTextAt' ] = head[ 'empty' ] = head[ 'html' ] = head[ 'text' ] = head[ 'css' ] = head[ 'cssText' ] =
 312                         body[ 'appendTo' ] = body[ 'prev' ] = body[ 'next' ] = body[ 'clone' ] = body[ 'remove' ] = body[ 'destroy' ] = new Function( 'return this' );
 313
 314                         X_ViewPort[ 'listenOnce' ]( X_EVENT_PRE_INIT, function(){
 315                                 X_ViewPort_readyState = X_EVENT_XTREE_READY;
 316                                 if( X_TEMP.X_Dom_useBuilder ) X_TEMP.X_Dom_useBuilder = !!document.body.children.length;
 317                                 !X_TEMP.X_Dom_useBuilder && X_ViewPort[ 'asyncDispatch' ]( X_EVENT_XTREE_READY );
 318                         } );
 319
 320                         X_ViewPort[ 'listenOnce' ]( X_EVENT_XTREE_READY, function(){
 321                                 X_ViewPort_readyState = X_EVENT_INIT;
 322                                 //X_UA[ 'Opera7' ] && alert( 'bc' );
 323                                 X_Node_body[ 'appendAt' ]( 0,
 324                                         X_Node_systemNode = X_Doc_create( 'div', { 'class' : 'hidden-system-node' } ),
 325                                         X_Node_fontSizeNode = X_Doc_create( 'div', { 'class' : 'hidden-system-node' } )[ 'cssText' ]( 'line-height:1;height:1em;' )[ 'text' ]( 'X' )
 326                                 );
 327                                 X_Node_startUpdate();
 328
 329                                 X_ViewPort[ 'asyncDispatch' ]( X_EVENT_INIT );
 330                         } );
 331
 332                         X_ViewPort[ 'listenOnce' ]( X_EVENT_INIT, function(){
 333                                 var size = X_ViewPort_getWindowSize(),
 334
 335                                 // http://jsdo.it/imaya/kTYg
 336                                         body = document.body,
 337                                         defaultOverflow = document.body.style.overflow,
 338                                         w, h;
 339
 340                                 X_ViewPort_width  = size[ 0 ];
 341                                 X_ViewPort_height = size[ 1 ];
 342
 343                                 body.style.overflow = 'hidden';
 344                                 w = body.clientWidth;
 345                                 h = body.clientHeight;
 346
 347                                 body.style.overflow = 'scroll';
 348                                 w -= body.clientWidth;
 349                                 h -= body.clientHeight;
 350
 351                                 if( !w ) w = body.offsetWidth  - body.clientWidth;
 352                                 if( !h ) h = body.offsetHeight - body.clientHeight;
 353                                 body.style.overflow = defaultOverflow;
 354
 355                                 X_ViewPort_vScrollbarSize = w;
 356                                 X_ViewPort_hScrollbarSize = h;
 357                                 if( h <= 0 ){ // ie6, ie11, firefox で　負の値が返る
 358                                         console.log( 'invalid hScrollbarSize: ' + h );
 359                                         X_ViewPort_hScrollbarSize = w;
 360                                 };
 361
 362                                 //
 363                                 if( X_ViewPort_orientationchange ){
 364                                         X_EventDispatcher_systemListen( X_ViewPort, 'orientationchange', X_ViewPort_orientationchange );
 365                                 };
 366
 367                                 if( X_ViewPort_detectFontSize ){
 368                                         X_EventDispatcher_systemListen( X_ViewPort, 'resize', X_ViewPort_resize );
 369                                         X_Timer_add( 333, X_ViewPort_detectFontSize );
 370                                 } else {
 371                                         X_Timer_add( 333, X_ViewPort_resize );
 372                                 };
 373
 374                                 X_ViewPort_baseFontSize = X_Node_fontSizeNode[ '_rawObject' ].offsetHeight;
 375
 376                                 X_ViewPort[ 'asyncDispatch' ]( X_ViewPort_readyState = X_EVENT_XDOM_READY );
 377                         } );
 378
 379                         X_ViewPort[ 'asyncDispatch' ]( X_EVENT_PRE_INIT );
 380
 381
 382                         X_EventDispatcher_systemListen( X_ViewPort, [ 'beforeunload', 'unload' ] );
 383
 384 //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
 385 //http://d.hatena.ne.jp/koumiya/20080916/1221580149
 386
 387                         if( document[ 'hidden' ] !== undefined ){// iOS 7+
 388                                 X_EventDispatcher_systemListen( X_ViewPort_document, 'visibilitychange', X_ViewPort );
 389                         } else
 390                         if( document[ 'mozHidden' ] !== undefined ){
 391                                 X_EventDispatcher_systemListen( X_ViewPort_document, 'mozvisibilitychange', X_ViewPort );
 392                         } else
 393                         if( document[ 'webkitHidden' ] !== undefined ){
 394                                 X_EventDispatcher_systemListen( X_ViewPort_document, 'webkitvisibilitychange', X_ViewPort );
 395                         } else
 396                         if( X_UA[ 'iOS' ] && window[ 'onpageshow' ] !== undefined ){
 397                                 X_EventDispatcher_systemListen( X_ViewPort, [ 'pageshow', 'pagehide' ] );
 398                         } else {
 399                                 X_EventDispatcher_systemListen( X_ViewPort, [ 'focus', 'blur' ] );
 400                         };
 401
 402                         return X_Callback_UN_LISTEN;
 403                 };
 404
 405                 function X_ViewPort_getWindowSize(){
 406                         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！
 407                                 [ X_ViewPort_rootElement.clientWidth, X_ViewPort_rootElement.clientHeight ] :
 408                                 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！
 409                                 [ X_ViewPort_rootElement.offsetWidth, X_ViewPort_rootElement.offsetHeight ] :
 410                                 [ window.innerWidth, window.innerHeight ];
 411                 };
 412
 413
 414 console.log( 'X.Dom dom:w3c=' + X_UA_DOM.W3C + ' ev:w3c=' + X_UA_EVENT.W3C );
 415
 416 /* -----------------------------------------------
 417  * Document Ready
 418  *  Dean Edwards/Matthias Miller/John Resig
 419  */
 420
 421 // SafariでJavaScriptのデバッグをする方法
 422 // safari1.3 可
 423 // http://shimax.cocolog-nifty.com/search/2006/09/safarijavascrip_c54d.html
 424
 425 /* for ie9+/Mozilla/Opera9 */
 426 if( X_UA_EVENT.W3C ){
 427         X_ViewPort_document[ 'listenOnce' ]( 'DOMContentLoaded', X_TEMP.onDomContentLoaded );
 428 } else
 429 if( 6 <= X_UA[ 'IE' ] && X[ 'inHead' ] ){
 430         // if this script in Head
 431         document.write( "<script id=__ie_onload defer src=javascript:void(0)><\/script>" );
 432         X_TEMP._script = document.getElementById( "__ie_onload" );
 433         X_TEMP._script.onreadystatechange = function(){
 434                 var s = X_TEMP._script;
 435                 if( s && s.readyState === 'complete' ){
 436                         s.onreadystatechange = X_emptyFunction;
 437                         s.onreadystatechange = null;
 438                         s.parentNode.removeChild( s );
 439                         delete X_TEMP._script;
 440                         X_TEMP.onDomContentLoaded && X_TEMP.onDomContentLoaded();
 441                 };
 442         };
 443 };
 444 // Re: onLoad doesn't work with Safari?
 445 // http://lists.apple.com/archives/web-dev/2003/Oct/msg00036.html
 446 if( X_UA[ 'WebKit' ] || X_UA[ 'Safari' ]  < 3 ){ // sniff
 447         X_Timer_add( 16, function(){
 448                 if( !X_TEMP.onDomContentLoaded ) return X_Callback_UN_LISTEN;
 449                 if( document.readyState === 'loaded' || document.readyState === 'complete' ) return X_TEMP.onDomContentLoaded();
 450         });
 451 };
 452
 453 /* for other browsers */
 454 X_ViewPort[ 'listenOnce' ]( 'load', X_TEMP.onDomContentLoaded );