*/
jobs = [],
- // Selector cache for the marker element. Use getMarker() to get/use the marker!
- $marker = null,
+ // For getMarker()
+ marker = null,
- // For #addEmbeddedCSS
+ // For addEmbeddedCSS()
cssBuffer = '',
cssBufferTimer = null,
- cssCallbacks = $.Callbacks();
+ cssCallbacks = $.Callbacks(),
+ isIEto9 = 'documentMode' in document && document.documentMode <= 9,
+ isIE9 = document.documentMode === 9;
function getMarker() {
- if ( !$marker ) {
+ if ( !marker ) {
// Cache
- $marker = $( 'meta[name="ResourceLoaderDynamicStyles"]' );
- if ( !$marker.length ) {
- mw.log( 'No <meta name="ResourceLoaderDynamicStyles"> found, inserting dynamically' );
- $marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' );
+ marker = document.querySelector( 'meta[name="ResourceLoaderDynamicStyles"]' );
+ if ( !marker ) {
+ mw.log( 'Create <meta name="ResourceLoaderDynamicStyles"> dynamically' );
+ marker = $( '<meta>' ).attr( 'name', 'ResourceLoaderDynamicStyles' ).appendTo( 'head' )[ 0 ];
}
}
- return $marker;
+ return marker;
}
/**
*
* @private
* @param {string} text CSS text
- * @param {HTMLElement|jQuery} [nextnode=document.head] The element where the style tag
+ * @param {Node} [nextNode] The element where the style tag
* should be inserted before
* @return {HTMLElement} Reference to the created style element
*/
- function newStyleTag( text, nextnode ) {
+ function newStyleTag( text, nextNode ) {
var s = document.createElement( 'style' );
// Support: IE
- // Must attach to document before setting cssText (bug 33305)
- if ( nextnode ) {
- $( nextnode ).before( s );
+ // Must attach style element to the document before setting cssText (T35305)
+ if ( nextNode && nextNode.parentNode ) {
+ nextNode.parentNode.insertBefore( s, nextNode );
} else {
document.getElementsByTagName( 'head' )[ 0 ].appendChild( s );
}
cssBuffer = '';
}
- // By default, always create a new <style>. Appending text to a <style>
- // tag is bad as it means the contents have to be re-parsed (bug 45810).
+ // By default, always create a new <style>. Appending text to a <style> tag is
+ // is a performance anti-pattern as it requires CSS to be reparsed (T47810).
//
- // Except, of course, in IE 9 and below. In there we default to re-using and
- // appending to a <style> tag due to the IE stylesheet limit (bug 31676).
- if ( 'documentMode' in document && document.documentMode <= 9 ) {
-
- $style = getMarker().prev();
- // Verify that the element before the marker actually is a
- // <style> tag and one that came from ResourceLoader
- // (not some other style tag or even a `<meta>` or `<script>`).
+ // Support: IE 6-9
+ // Try to re-use existing <style> tags due to the IE stylesheet limit (T33676).
+ if ( isIEto9 ) {
+ $style = $( getMarker() ).prev();
+ // Verify that the element before the marker actually is a <style> tag created
+ // by mw.loader (not some other style tag, or e.g. a <meta> tag).
if ( $style.data( 'ResourceLoaderDynamicStyleTag' ) ) {
- // There's already a dynamic <style> tag present and
- // we are able to append more to it.
- styleEl = $style.get( 0 );
- // Support: IE6-10
+ styleEl = $style[ 0 ];
+ // Support: IE 6-10
if ( styleEl.styleSheet ) {
try {
- // Support: IE9
- // We can't do styleSheet.cssText += cssText, since IE9 mangles this property on
- // write, dropping @media queries from the CSS text. If we read it and used its
- // value, we would accidentally apply @media-specific styles to all media. (T108727)
- if ( document.documentMode === 9 ) {
+ // Support: IE 9
+ // We can't do styleSheet.cssText += cssText in IE9 because it mangles cssText on
+ // write (removes @media queries). If we read it and used its value, we'd
+ // accidentally apply @media-specific styles to all media. (T108727)
+ if ( isIE9 ) {
newCssText = $style.data( 'ResourceLoaderDynamicStyleTag' ) + cssText;
styleEl.styleSheet.cssText = newCssText;
$style.data( 'ResourceLoaderDynamicStyleTag', newCssText );
fireCallbacks();
return;
}
+ // Else: No existing tag to reuse. Continue below and create the first one.
}
$style = $( newStyleTag( cssText, getMarker() ) );
- if ( document.documentMode === 9 ) {
- // Support: IE9
- // Preserve original CSS text because IE9 mangles it on write
- $style.data( 'ResourceLoaderDynamicStyleTag', cssText );
- } else {
- $style.data( 'ResourceLoaderDynamicStyleTag', true );
+ if ( isIEto9 ) {
+ if ( isIE9 ) {
+ $style.data( 'ResourceLoaderDynamicStyleTag', cssText );
+ } else {
+ $style.data( 'ResourceLoaderDynamicStyleTag', true );
+ }
}
fireCallbacks();
var el = document.createElement( 'link' );
// Support: IE
// Insert in document *before* setting href
- getMarker().before( el );
+ $( getMarker() ).before( el );
el.rel = 'stylesheet';
if ( media && media !== 'all' ) {
el.media = media;
dépôts / lhc / web / wiklou.git / commitdiff