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/* global pm, wpcom_reblog, JSON */ |
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|
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var jetpackLikesWidgetBatch = []; |
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var jetpackLikesMasterReady = false; |
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|
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// Due to performance problems on pages with a large number of widget iframes that need to be loaded, |
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// we are limiting the processing at any instant to unloaded widgets that are currently in viewport, |
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// plus this constant that will allow processing of widgets above and bellow the current fold. |
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// This aim of it is to improve the UX and hide the transition from unloaded to loaded state from users. |
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var jetpackLikesLookAhead = 2000; // pixels |
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|
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// Keeps track of loaded comment likes widget so we can unload them when they are scrolled out of view. |
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var jetpackCommentLikesLoadedWidgets = []; |
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|
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function JetpackLikesPostMessage( message, target ) { |
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if ( 'string' === typeof message ) { |
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try { |
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message = JSON.parse( message ); |
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} catch ( e ) { |
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return; |
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} |
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} |
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|
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pm( { |
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target: target, |
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type: 'likesMessage', |
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data: message, |
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origin: '*', |
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} ); |
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} |
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|
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function JetpackLikesBatchHandler() { |
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var requests = []; |
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jQuery( 'div.jetpack-likes-widget-unloaded' ).each( function () { |
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if ( jetpackLikesWidgetBatch.indexOf( this.id ) > -1 ) { |
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return; |
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} |
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|
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if ( ! jetpackIsScrolledIntoView( this ) ) { |
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return; |
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} |
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|
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jetpackLikesWidgetBatch.push( this.id ); |
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|
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var regex = /like-(post|comment)-wrapper-(\d+)-(\d+)-(\w+)/, |
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match = regex.exec( this.id ), |
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info; |
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|
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if ( ! match || match.length !== 5 ) { |
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return; |
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} |
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|
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info = { |
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blog_id: match[ 2 ], |
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width: this.width, |
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}; |
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|
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if ( 'post' === match[ 1 ] ) { |
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info.post_id = match[ 3 ]; |
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} else if ( 'comment' === match[ 1 ] ) { |
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info.comment_id = match[ 3 ]; |
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} |
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|
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info.obj_id = match[ 4 ]; |
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|
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requests.push( info ); |
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} ); |
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|
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if ( requests.length > 0 ) { |
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JetpackLikesPostMessage( |
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{ event: 'initialBatch', requests: requests }, |
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window.frames[ 'likes-master' ] |
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); |
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} |
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} |
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|
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function JetpackLikesMessageListener( event, message ) { |
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var allowedOrigin, $container, $list, offset, rowLength, height, scrollbarWidth; |
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|
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if ( 'undefined' === typeof event.event ) { |
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return; |
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} |
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|
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// We only allow messages from one origin |
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allowedOrigin = 'https://widgets.wp.com'; |
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if ( allowedOrigin !== message.origin ) { |
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return; |
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} |
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|
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switch ( event.event ) { |
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case 'masterReady': |
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jQuery( document ).ready( function () { |
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jetpackLikesMasterReady = true; |
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|
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var stylesData = { |
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event: 'injectStyles', |
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}, |
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$sdTextColor = jQuery( '.sd-text-color' ), |
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$sdLinkColor = jQuery( '.sd-link-color' ); |
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|
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if ( jQuery( 'iframe.admin-bar-likes-widget' ).length > 0 ) { |
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JetpackLikesPostMessage( { event: 'adminBarEnabled' }, window.frames[ 'likes-master' ] ); |
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|
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stylesData.adminBarStyles = { |
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background: jQuery( '#wpadminbar .quicklinks li#wp-admin-bar-wpl-like > a' ).css( |
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'background' |
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), |
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isRtl: 'rtl' === jQuery( '#wpadminbar' ).css( 'direction' ), |
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}; |
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} |
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|
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if ( ! window.addEventListener ) { |
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jQuery( '#wp-admin-bar-admin-bar-likes-widget' ).hide(); |
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} |
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|
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stylesData.textStyles = { |
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color: $sdTextColor.css( 'color' ), |
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fontFamily: $sdTextColor.css( 'font-family' ), |
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fontSize: $sdTextColor.css( 'font-size' ), |
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direction: $sdTextColor.css( 'direction' ), |
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fontWeight: $sdTextColor.css( 'font-weight' ), |
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fontStyle: $sdTextColor.css( 'font-style' ), |
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textDecoration: $sdTextColor.css( 'text-decoration' ), |
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}; |
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|
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stylesData.linkStyles = { |
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color: $sdLinkColor.css( 'color' ), |
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fontFamily: $sdLinkColor.css( 'font-family' ), |
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fontSize: $sdLinkColor.css( 'font-size' ), |
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textDecoration: $sdLinkColor.css( 'text-decoration' ), |
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fontWeight: $sdLinkColor.css( 'font-weight' ), |
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fontStyle: $sdLinkColor.css( 'font-style' ), |
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}; |
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|
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JetpackLikesPostMessage( stylesData, window.frames[ 'likes-master' ] ); |
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|
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JetpackLikesBatchHandler(); |
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} ); |
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|
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break; |
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|
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case 'showLikeWidget': |
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jQuery( '#' + event.id + ' .likes-widget-placeholder' ).fadeOut( 'fast' ); |
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break; |
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|
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case 'showCommentLikeWidget': |
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jQuery( '#' + event.id + ' .likes-widget-placeholder' ).fadeOut( 'fast' ); |
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break; |
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|
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case 'killCommentLikes': |
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// If kill switch for comment likes is enabled remove all widgets wrappers and `Loading...` placeholders. |
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jQuery( '.jetpack-comment-likes-widget-wrapper' ).remove(); |
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break; |
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|
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case 'clickReblogFlair': |
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wpcom_reblog.toggle_reblog_box_flair( event.obj_id ); |
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break; |
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|
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case 'showOtherGravatars': |
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$container = jQuery( '#likes-other-gravatars' ); |
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$list = $container.find( 'ul' ); |
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|
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$container.hide(); |
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$list.html( '' ); |
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|
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$container.find( '.likes-text span' ).text( event.total ); |
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|
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jQuery.each( event.likers, function ( i, liker ) { |
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var element; |
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|
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if ( 'http' !== liker.profile_URL.substr( 0, 4 ) ) { |
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// We only display gravatars with http or https schema |
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return; |
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} |
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|
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element = jQuery( '<li><a><img /></a></li>' ); |
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element.addClass( liker.css_class ); |
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|
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element |
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.find( 'a' ) |
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.attr( { |
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href: liker.profile_URL, |
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rel: 'nofollow', |
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target: '_parent', |
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} ) |
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.addClass( 'wpl-liker' ); |
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|
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element |
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.find( 'img' ) |
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.attr( { |
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src: liker.avatar_URL, |
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alt: liker.name, |
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} ) |
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.css( { |
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width: '30px', |
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height: '30px', |
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paddingRight: '3px', |
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} ); |
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|
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$list.append( element ); |
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} ); |
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|
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offset = jQuery( 'body' ) |
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.find( "[name='" + event.parent + "']" ) |
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.offset(); |
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|
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$container.css( 'left', offset.left + event.position.left - 10 + 'px' ); |
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$container.css( 'top', offset.top + event.position.top - 33 + 'px' ); |
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|
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rowLength = Math.floor( event.width / 37 ); |
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height = Math.ceil( event.likers.length / rowLength ) * 37 + 13; |
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if ( height > 204 ) { |
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height = 204; |
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} |
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|
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$container.css( 'height', height + 'px' ); |
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$container.css( 'width', rowLength * 37 - 7 + 'px' ); |
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|
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$list.css( 'width', rowLength * 37 + 'px' ); |
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|
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$container.fadeIn( 'slow' ); |
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|
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scrollbarWidth = $list[ 0 ].offsetWidth - $list[ 0 ].clientWidth; |
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if ( scrollbarWidth > 0 ) { |
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$container.width( $container.width() + scrollbarWidth ); |
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$list.width( $list.width() + scrollbarWidth ); |
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} |
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} |
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} |
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|
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pm.bind( 'likesMessage', JetpackLikesMessageListener ); |
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|
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jQuery( document ).click( function ( e ) { |
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var $container = jQuery( '#likes-other-gravatars' ); |
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|
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if ( $container.has( e.target ).length === 0 ) { |
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$container.fadeOut( 'slow' ); |
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} |
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} ); |
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|
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function JetpackLikesWidgetQueueHandler() { |
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var wrapperID; |
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|
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if ( ! jetpackLikesMasterReady ) { |
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setTimeout( JetpackLikesWidgetQueueHandler, 500 ); |
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return; |
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} |
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|
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// Restore widgets to initial unloaded state when they are scrolled out of view. |
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jetpackUnloadScrolledOutWidgets(); |
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|
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var unloadedWidgetsInView = jetpackGetUnloadedWidgetsInView(); |
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|
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if ( unloadedWidgetsInView.length > 0 ) { |
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// Grab any unloaded widgets for a batch request |
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JetpackLikesBatchHandler(); |
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} |
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|
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for ( var i = 0, length = unloadedWidgetsInView.length; i <= length - 1; i++ ) { |
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wrapperID = unloadedWidgetsInView[ i ].id; |
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|
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if ( ! wrapperID ) { |
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continue; |
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} |
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|
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jetpackLoadLikeWidgetIframe( wrapperID ); |
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} |
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} |
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|
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function jetpackLoadLikeWidgetIframe( wrapperID ) { |
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var $wrapper; |
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|
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if ( 'undefined' === typeof wrapperID ) { |
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return; |
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} |
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|
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$wrapper = jQuery( '#' + wrapperID ); |
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$wrapper.find( 'iframe' ).remove(); |
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|
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var placeholder = $wrapper.find( '.likes-widget-placeholder' ); |
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|
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// Post like iframe |
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if ( placeholder.hasClass( 'post-likes-widget-placeholder' ) ) { |
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var postLikesFrame = document.createElement( 'iframe' ); |
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|
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postLikesFrame[ 'class' ] = 'post-likes-widget jetpack-likes-widget'; |
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postLikesFrame.name = $wrapper.data( 'name' ); |
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postLikesFrame.src = $wrapper.data( 'src' ); |
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postLikesFrame.height = '18px'; |
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postLikesFrame.width = '200px'; |
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postLikesFrame.frameBorder = '0'; |
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postLikesFrame.scrolling = 'no'; |
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|
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if ( $wrapper.hasClass( 'slim-likes-widget' ) ) { |
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postLikesFrame.height = '22px'; |
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postLikesFrame.width = '68px'; |
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postLikesFrame.scrolling = 'no'; |
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} else { |
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postLikesFrame.height = '55px'; |
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postLikesFrame.width = '100%'; |
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} |
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|
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placeholder.after( postLikesFrame ); |
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} |
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|
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// Comment like iframe |
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if ( placeholder.hasClass( 'comment-likes-widget-placeholder' ) ) { |
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var commentLikesFrame = document.createElement( 'iframe' ); |
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|
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commentLikesFrame[ 'class' ] = 'comment-likes-widget-frame jetpack-likes-widget-frame'; |
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commentLikesFrame.name = $wrapper.data( 'name' ); |
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commentLikesFrame.src = $wrapper.data( 'src' ); |
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commentLikesFrame.height = '18px'; |
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commentLikesFrame.width = '100%'; |
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commentLikesFrame.frameBorder = '0'; |
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commentLikesFrame.scrolling = 'no'; |
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|
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$wrapper.find( '.comment-like-feedback' ).after( commentLikesFrame ); |
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|
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jetpackCommentLikesLoadedWidgets.push( commentLikesFrame ); |
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} |
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|
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$wrapper |
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.removeClass( 'jetpack-likes-widget-unloaded' ) |
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.addClass( 'jetpack-likes-widget-loading' ); |
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|
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$wrapper.find( 'iframe' ).load( function ( e ) { |
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var $iframe = jQuery( e.target ); |
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|
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JetpackLikesPostMessage( |
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{ event: 'loadLikeWidget', name: $iframe.attr( 'name' ), width: $iframe.width() }, |
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window.frames[ 'likes-master' ] |
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); |
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|
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$wrapper |
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.removeClass( 'jetpack-likes-widget-loading' ) |
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.addClass( 'jetpack-likes-widget-loaded' ); |
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|
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if ( $wrapper.hasClass( 'slim-likes-widget' ) ) { |
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$wrapper.find( 'iframe' ).Jetpack( 'resizeable' ); |
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} |
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} ); |
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} |
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|
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function jetpackGetUnloadedWidgetsInView() { |
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var $unloadedWidgets = jQuery( 'div.jetpack-likes-widget-unloaded' ); |
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|
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return $unloadedWidgets.filter( function () { |
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return jetpackIsScrolledIntoView( this ); |
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} ); |
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} |
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|
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function jetpackIsScrolledIntoView( element ) { |
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var top = element.getBoundingClientRect().top; |
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var bottom = element.getBoundingClientRect().bottom; |
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|
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// Allow some slack above and bellow the fold with jetpackLikesLookAhead, |
| 358 |
// with the aim of hiding the transition from unloaded to loaded widget from users. |
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return top + jetpackLikesLookAhead >= 0 && bottom <= window.innerHeight + jetpackLikesLookAhead; |
| 360 |
} |
| 361 |
|
| 362 |
function jetpackUnloadScrolledOutWidgets() { |
| 363 |
for ( var i = jetpackCommentLikesLoadedWidgets.length - 1; i >= 0; i-- ) { |
| 364 |
var currentWidgetIframe = jetpackCommentLikesLoadedWidgets[ i ]; |
| 365 |
|
| 366 |
if ( ! jetpackIsScrolledIntoView( currentWidgetIframe ) ) { |
| 367 |
var $widgetWrapper = jQuery( currentWidgetIframe ).parent().parent(); |
| 368 |
|
| 369 |
// Restore parent class to 'unloaded' so this widget can be picked up by queue manager again if needed. |
| 370 |
$widgetWrapper |
| 371 |
.removeClass( 'jetpack-likes-widget-loaded jetpack-likes-widget-loading' ) |
| 372 |
.addClass( 'jetpack-likes-widget-unloaded' ); |
| 373 |
|
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// Bring back the loading placeholder into view. |
| 375 |
$widgetWrapper.children( '.comment-likes-widget-placeholder' ).fadeIn(); |
| 376 |
|
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// Remove it from the list of loaded widgets. |
| 378 |
jetpackCommentLikesLoadedWidgets.splice( i, 1 ); |
| 379 |
|
| 380 |
// Remove comment like widget iFrame. |
| 381 |
jQuery( currentWidgetIframe ).remove(); |
| 382 |
} |
| 383 |
} |
| 384 |
} |
| 385 |
|
| 386 |
var jetpackWidgetsDelayedExec = function ( after, fn ) { |
| 387 |
var timer; |
| 388 |
return function () { |
| 389 |
timer && clearTimeout( timer ); |
| 390 |
timer = setTimeout( fn, after ); |
| 391 |
}; |
| 392 |
}; |
| 393 |
|
| 394 |
var jetpackOnScrollStopped = jetpackWidgetsDelayedExec( 250, JetpackLikesWidgetQueueHandler ); |
| 395 |
|
| 396 |
// Load initial batch of widgets, prior to any scrolling events. |
| 397 |
JetpackLikesWidgetQueueHandler(); |
| 398 |
|
| 399 |
// Add event listener to execute queue handler after scroll. |
| 400 |
window.addEventListener( 'scroll', jetpackOnScrollStopped, true ); |
| 401 |
|
