+ 'href' => $url ) );
+ }
+
+ /**
+ * Add a local or specified stylesheet, with the given media options.
+ * Meant primarily for internal use...
+ *
+ * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
+ * @param $conditional -- for IE conditional comments, specifying an IE version
+ * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
+ */
+ public function addStyle( $style, $media='', $condition='', $dir='' ) {
+ $options = array();
+ if( $media )
+ $options['media'] = $media;
+ if( $condition )
+ $options['condition'] = $condition;
+ if( $dir )
+ $options['dir'] = $dir;
+ $this->styles[$style] = $options;
+ }
+
+ /**
+ * Build a set of <link>s for the stylesheets specified in the $this->styles array.
+ * These will be applied to various media & IE conditionals.
+ */
+ public function buildCssLinks() {
+ $links = array();
+ foreach( $this->styles as $file => $options ) {
+ $link = $this->styleLink( $file, $options );
+ if( $link )
+ $links[] = $link;
+ }
+
+ return implode( "\n\t\t", $links );
+ }
+
+ protected function styleLink( $style, $options ) {
+ global $wgRequest;
+
+ if( isset( $options['dir'] ) ) {
+ global $wgContLang;
+ $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
+ if( $siteDir != $options['dir'] )
+ return '';
+ }
+
+ if( isset( $options['media'] ) ) {
+ $media = $this->transformCssMedia( $options['media'] );
+ if( is_null( $media ) ) {
+ return '';
+ }
+ } else {
+ $media = '';
+ }
+
+ if( substr( $style, 0, 1 ) == '/' ||
+ substr( $style, 0, 5 ) == 'http:' ||
+ substr( $style, 0, 6 ) == 'https:' ) {
+ $url = $style;
+ } else {
+ global $wgStylePath, $wgStyleVersion;
+ $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
+ }
+
+ $attribs = array(
+ 'rel' => 'stylesheet',
+ 'href' => $url,
+ 'type' => 'text/css' );
+ if( $media ) {
+ $attribs['media'] = $media;
+ }
+
+ $link = Xml::element( 'link', $attribs );
+
+ if( isset( $options['condition'] ) ) {
+ $condition = htmlspecialchars( $options['condition'] );
+ $link = "<!--[if $condition]>$link<![endif]-->";
+ }
+ return $link;
+ }
+
+ function transformCssMedia( $media ) {
+ global $wgRequest, $wgHandheldForIPhone;
+
+ // Switch in on-screen display for media testing
+ $switches = array(
+ 'printable' => 'print',
+ 'handheld' => 'handheld',
+ );
+ foreach( $switches as $switch => $targetMedia ) {
+ if( $wgRequest->getBool( $switch ) ) {
+ if( $media == $targetMedia ) {
+ $media = '';
+ } elseif( $media == 'screen' ) {
+ return null;
+ }
+ }
+ }
+
+ // Expand longer media queries as iPhone doesn't grok 'handheld'
+ if( $wgHandheldForIPhone ) {
+ $mediaAliases = array(
+ 'screen' => 'screen and (min-device-width: 481px)',
+ 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
+ );
+
+ if( isset( $mediaAliases[$media] ) ) {
+ $media = $mediaAliases[$media];
+ }
+ }
+
+ return $media;