/
ExternalCSSLoader.js
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/
ExternalCSSLoader.js
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/** ===========================================================================
* export to packageGlobal
*/
/**
*
* @param {string} url
* @param {!function(boolean)} onCompleteCallback
* @param {string} testIdAndClassName
* @param {!HTMLLinkElement=} opt_elmLink
*/
p_loadExternalCSS = function( url, onCompleteCallback, testIdAndClassName, opt_elmLink ){
var elmLink = opt_elmLink || p_DOM_insertElement(
p_head, 'link',
{
type : 'text/css',
rel : 'stylesheet'
}
),
widthBeforeCSSLoaded;
if( ExternalCSSLoader_mesure ){
ExternalCSSLoader_elmTest = p_DOM_getElementById( testIdAndClassName );
if( !ExternalCSSLoader_elmTest ){
ExternalCSSLoader_elmTest = p_DOM_insertElement(
p_body, 'div',
{
'aria-hidden' : 'true',
className : testIdAndClassName
}
);
} else {
p_DOM_removeAttribute( ExternalCSSLoader_elmTest, 'id' );
};
widthBeforeCSSLoaded = ExternalCSSLoader_elmTest.offsetWidth;
Debug.log( '[CSS Loader] widthBeforeCSSLoaded = ' + widthBeforeCSSLoaded );
p_DOM_setAttribute( ExternalCSSLoader_elmTest, 'id', testIdAndClassName );
};
ExternalCSSLoader_main( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded );
return elmLink;
};
/** ===========================================================================
* private
*/
var ExternalCSSLoader_INTERVAL_TIME = 999;
var ExternalCSSLoader_UNSUPPORTED = p_Gecko && ua.conpare( p_engineVersion, '0.9.1' ) < 0;
var ExternalCSSLoader_USE_ONLOAD_THEN_MESURE = 11 <= p_Trident ||
p_EdgeHTML ||
( 9 <= p_Presto && p_Presto < 9.5 );
var ExternalCSSLoader_USE_ONREADYSTATECHANGE_THEN_MESURE = p_Trident < 11;
var ExternalCSSLoader_USE_ADDEVENTLISTENER_LOAD_THEN_MESURE = 7.2 <= p_Presto && p_Presto < 7.5;
var ExternalCSSLoader_USE_IMAGEONERROR_THEN_MESURE = ( p_Gecko < 26 && !ExternalCSSLoader_UNSUPPORTED ) || // 26 は暫定
p_Chromium < 19 ||
p_AOSP < 4.3 || // 多分
p_Samsung < 2 || // 暫定
p_WebKit < 536 || // Safari 6未満
p_SafariMobile < 6 ||
( 7 <= p_Presto && p_Presto < 9 && !ExternalCSSLoader_USE_ADDEVENTLISTENER_LOAD_THEN_MESURE );
var ExternalCSSLoader_GODD = !ExternalCSSLoader_UNSUPPORTED &&
!ExternalCSSLoader_USE_ONLOAD_THEN_MESURE &&
!ExternalCSSLoader_USE_ONREADYSTATECHANGE_THEN_MESURE &&
!ExternalCSSLoader_USE_ADDEVENTLISTENER_LOAD_THEN_MESURE &&
!ExternalCSSLoader_USE_IMAGEONERROR_THEN_MESURE;
var ExternalCSSLoader_elmTest;
/**
* @type {function(!HTMLLinkElement, string, !function(boolean), number=)}
*/
var ExternalCSSLoader_main =
ExternalCSSLoader_GODD ?
function( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded ){
Debug.log( '[CSS Loader] onload + onerror' );
elmLink.onload = onSuccess;
elmLink.onerror = onError;
elmLink.href = url;
function onSuccess(){
onCompleteCallback( true );
elmLink.onload = elmLink.onerror = null;
};
function onError(){
onCompleteCallback( false );
elmLink.onload = elmLink.onerror = null;
};
} :
ExternalCSSLoader_USE_ONLOAD_THEN_MESURE ?
function( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded ){
Debug.log( '[CSS Loader] onload + mesure' );
elmLink.onload = onComplete;
elmLink.href = url;
function onComplete(){
onCompleteCallback( /** @type {!function(number):boolean} */ (ExternalCSSLoader_mesure)( /** @type {number} */ (widthBeforeCSSLoaded) ) );
DEFINE_WEB_DOC_BASE__DEBUG || p_DOM_remove( ExternalCSSLoader_elmTest );
elmLink.onload = ExternalCSSLoader_elmTest = null;
};
} :
ExternalCSSLoader_USE_ONREADYSTATECHANGE_THEN_MESURE ?
function( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded ){
Debug.log( '[CSS Loader] onreadystatechange + onerror' );
elmLink.onreadystatechange = function onReadyStateChange(){
if( elmLink.readyState === 'complete' ){
onCompleteCallback( /** @type {!function(number):boolean} */ (ExternalCSSLoader_mesure)( /** @type {number} */ (widthBeforeCSSLoaded) ) );
elmLink.onReadyStateChange = p_emptyFunction;
DEFINE_WEB_DOC_BASE__DEBUG || p_DOM_remove( ExternalCSSLoader_elmTest );
ExternalCSSLoader_elmTest = null;
};
};
elmLink.href = url;
} :
ExternalCSSLoader_USE_IMAGEONERROR_THEN_MESURE || ExternalCSSLoader_USE_ADDEVENTLISTENER_LOAD_THEN_MESURE ?
function( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded ){
var img = new Image, limit;
if( ExternalCSSLoader_USE_IMAGEONERROR_THEN_MESURE ){
Debug.log( '[CSS Loader] img.onerror + mesure' );
img.onerror = onComplete;
} else {
Debug.log( '[CSS Loader] img.addEventListener("load") + mesure' );
img.addEventListener( 'load', onComplete, false );
};
img.src = url;
function onComplete(){
limit = p_getTimestamp() + ExternalCSSLoader_INTERVAL_TIME;
p_setTimer( onTimer, 0, 99 );
if( ExternalCSSLoader_USE_IMAGEONERROR_THEN_MESURE ){
img.onerror = null;
} else {
img.removeEventListener( 'load', onComplete, false );
};
img = null;
elmLink.href = url;
};
function onTimer(){
if( /** @type {!function(number):boolean} */ (ExternalCSSLoader_mesure)( /** @type {number} */ (widthBeforeCSSLoaded) ) ){
DEFINE_WEB_DOC_BASE__DEBUG || p_DOM_remove( ExternalCSSLoader_elmTest );
onCompleteCallback( true );
ExternalCSSLoader_elmTest = null;
} else if( p_getTimestamp() < limit ){
p_setTimer( onTimer, 0, 99 );
} else {
onCompleteCallback( false );
DEFINE_WEB_DOC_BASE__DEBUG || p_DOM_remove( ExternalCSSLoader_elmTest );
ExternalCSSLoader_elmTest = null;
};
};
} :
function( elmLink, url, onCompleteCallback, widthBeforeCSSLoaded ){
Debug.log( '[CSS Loader] UNSUPPORTED' );
p_setTimer( /** @type {function(*=)} */ (onCompleteCallback), false );
};
/** @type {function(number):boolean|boolean} */
var ExternalCSSLoader_mesure = !ExternalCSSLoader_GODD && !ExternalCSSLoader_UNSUPPORTED &&
function( widthBeforeCSSLoaded ){
if( DEFINE_WEB_DOC_BASE__DEBUG ){
Debug.log( '[CSS Loader] ExternalCSSLoader_elmTest.offsetWidth = ' + ExternalCSSLoader_elmTest.offsetWidth );
};
return ExternalCSSLoader_elmTest.offsetWidth !== widthBeforeCSSLoaded;
};