| 1 |
/* global wpcom_reblog */ |
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|
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var jetpackLikesWidgetBatch = []; |
| 4 |
var jetpackLikesMasterReady = false; |
| 5 |
|
| 6 |
// Due to performance problems on pages with a large number of widget iframes that need to be loaded, |
| 7 |
// we are limiting the processing at any instant to unloaded widgets that are currently in viewport, |
| 8 |
// plus this constant that will allow processing of widgets above and bellow the current fold. |
| 9 |
// This aim of it is to improve the UX and hide the transition from unloaded to loaded state from users. |
| 10 |
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. |
| 13 |
var jetpackCommentLikesLoadedWidgets = []; |
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|
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var jetpackLikesDocReadyPromise = new Promise( resolve => { |
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if ( document.readyState !== 'loading' ) { |
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resolve(); |
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} else { |
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window.addEventListener( 'DOMContentLoaded', () => resolve() ); |
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} |
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} ); |
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|
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function JetpackLikesPostMessage( message, target ) { |
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if ( typeof message === 'string' ) { |
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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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if ( target && typeof target.postMessage === 'function' ) { |
| 33 |
try { |
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target.postMessage( |
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JSON.stringify( { |
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type: 'likesMessage', |
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data: message, |
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} ), |
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'*' |
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); |
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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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|
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function JetpackLikesBatchHandler() { |
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const requests = []; |
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document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' ).forEach( widget => { |
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if ( jetpackLikesWidgetBatch.indexOf( widget.id ) > -1 ) { |
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return; |
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} |
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|
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if ( ! jetpackIsScrolledIntoView( widget ) ) { |
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return; |
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} |
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|
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jetpackLikesWidgetBatch.push( widget.id ); |
| 59 |
|
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var regex = /like-(post|comment)-wrapper-(\d+)-(\d+)-(\w+)/, |
| 61 |
match = regex.exec( widget.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: widget.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 ) { |
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let message = event && event.data; |
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if ( typeof message === 'string' ) { |
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try { |
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message = JSON.parse( message ); |
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} catch ( err ) { |
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return; |
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} |
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} |
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|
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const type = message && message.type; |
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const data = message && message.data; |
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|
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if ( type !== 'likesMessage' || typeof data.event === 'undefined' ) { |
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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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const allowedOrigin = 'https://widgets.wp.com'; |
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if ( allowedOrigin !== event.origin ) { |
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return; |
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} |
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|
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switch ( data.event ) { |
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case 'masterReady': |
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jetpackLikesDocReadyPromise.then( () => { |
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jetpackLikesMasterReady = true; |
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|
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const stylesData = { |
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event: 'injectStyles', |
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}; |
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const sdTextColor = document.querySelector( '.sd-text-color' ); |
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const sdLinkColor = document.querySelector( '.sd-link-color' ); |
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const sdTextColorStyles = ( sdTextColor && getComputedStyle( sdTextColor ) ) || {}; |
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const sdLinkColorStyles = ( sdLinkColor && getComputedStyle( sdLinkColor ) ) || {}; |
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|
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if ( document.querySelectorAll( '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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const bgSource = document.querySelector( |
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'#wpadminbar .quicklinks li#wp-admin-bar-wpl-like > a' |
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); |
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|
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const wpAdminBar = document.querySelector( '#wpadminbar' ); |
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|
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stylesData.adminBarStyles = { |
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background: bgSource && getComputedStyle( bgSource ).background, |
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isRtl: wpAdminBar && getComputedStyle( wpAdminBar ).direction === 'rtl', |
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}; |
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} |
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|
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// enable reblogs if we're on a single post page |
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if ( document.body.classList.contains( 'single' ) ) { |
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JetpackLikesPostMessage( { event: 'reblogsEnabled' }, window.frames[ 'likes-master' ] ); |
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} |
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|
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stylesData.textStyles = { |
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color: sdTextColorStyles[ 'color' ], |
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fontFamily: sdTextColorStyles[ 'font-family' ], |
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fontSize: sdTextColorStyles[ 'font-size' ], |
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direction: sdTextColorStyles[ 'direction' ], |
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fontWeight: sdTextColorStyles[ 'font-weight' ], |
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fontStyle: sdTextColorStyles[ 'font-style' ], |
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textDecoration: sdTextColorStyles[ 'text-decoration' ], |
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}; |
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|
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stylesData.linkStyles = { |
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color: sdLinkColorStyles[ 'color' ], |
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fontFamily: sdLinkColorStyles[ 'font-family' ], |
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fontSize: sdLinkColorStyles[ 'font-size' ], |
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textDecoration: sdLinkColorStyles[ 'text-decoration' ], |
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fontWeight: sdLinkColorStyles[ 'font-weight' ], |
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fontStyle: sdLinkColorStyles[ '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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const placeholder = document.querySelector( `#${ data.id } .likes-widget-placeholder` ); |
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if ( placeholder ) { |
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placeholder.style.display = 'none'; |
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} |
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break; |
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} |
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|
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case 'showCommentLikeWidget': { |
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const placeholder = document.querySelector( `#${ data.id } .likes-widget-placeholder` ); |
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if ( placeholder ) { |
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placeholder.style.display = 'none'; |
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} |
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break; |
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} |
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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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document |
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.querySelectorAll( '.jetpack-comment-likes-widget-wrapper' ) |
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.forEach( wrapper => wrapper.remove() ); |
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break; |
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|
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case 'clickReblogFlair': |
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if ( wpcom_reblog && typeof wpcom_reblog.toggle_reblog_box_flair === 'function' ) { |
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wpcom_reblog.toggle_reblog_box_flair( data.obj_id ); |
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} |
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break; |
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|
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case 'showOtherGravatars': { |
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const container = document.querySelector( '#likes-other-gravatars' ); |
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if ( ! container ) { |
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break; |
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} |
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|
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const list = container.querySelector( 'ul' ); |
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|
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container.style.display = 'none'; |
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list.innerHTML = ''; |
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|
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container |
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.querySelectorAll( '.likes-text span' ) |
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.forEach( item => ( item.textContent = data.total ) ); |
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|
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( data.likers || [] ).forEach( liker => { |
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if ( liker.profile_URL.substr( 0, 4 ) !== 'http' ) { |
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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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const element = document.createElement( 'li' ); |
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element.innerHTML = ` |
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<a href="${ encodeURI( liker.profile_URL ) }" rel="nofollow" target="_parent" class="wpl-liker"> |
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<img src="${ encodeURI( liker.avatar_URL ) }" |
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alt="" |
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style="width: 30px; height: 30px; padding-right: 3px;" /> |
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</a> |
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`; |
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|
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list.append( element ); |
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|
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// Add some extra attributes through native methods, to ensure strings are sanitized. |
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element.classList.add( liker.css_class ); |
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element.querySelector( 'img' ).alt = liker.name; |
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} ); |
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|
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const el = document.querySelector( `*[name='${ data.parent }']` ); |
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const rect = el.getBoundingClientRect(); |
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const win = el.ownerDocument.defaultView; |
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const offset = { |
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top: rect.top + win.pageYOffset, |
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left: rect.left + win.pageXOffset, |
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}; |
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|
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container.style.left = offset.left + data.position.left - 10 + 'px'; |
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container.style.top = offset.top + data.position.top - 33 + 'px'; |
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|
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const rowLength = Math.floor( data.width / 37 ); |
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let height = Math.ceil( data.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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const containerWidth = rowLength * 37 - 7; |
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container.style.height = height + 'px'; |
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container.style.width = containerWidth + 'px'; |
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|
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const listWidth = rowLength * 37; |
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list.style.width = listWidth + 'px'; |
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|
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container.style.display = 'block'; |
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|
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const scrollbarWidth = list.offsetWidth - list.clientWidth; |
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if ( scrollbarWidth > 0 ) { |
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container.style.width = containerWidth + scrollbarWidth + 'px'; |
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list.style.width = listWidth + scrollbarWidth + 'px'; |
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} |
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} |
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} |
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} |
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|
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window.addEventListener( 'message', JetpackLikesMessageListener ); |
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|
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document.addEventListener( 'click', e => { |
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const container = document.querySelector( '#likes-other-gravatars' ); |
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|
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if ( container && ! container.contains( e.target ) ) { |
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container.style.display = 'none'; |
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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; |
| 305 |
|
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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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if ( typeof wrapperID === 'undefined' ) { |
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return; |
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} |
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|
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const wrapper = document.querySelector( '#' + wrapperID ); |
| 320 |
wrapper.querySelectorAll( 'iframe' ).forEach( iFrame => iFrame.remove() ); |
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|
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const placeholder = wrapper.querySelector( '.likes-widget-placeholder' ); |
| 323 |
|
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// Post like iframe |
| 325 |
if ( placeholder && placeholder.classList.contains( 'post-likes-widget-placeholder' ) ) { |
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const postLikesFrame = document.createElement( 'iframe' ); |
| 327 |
|
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postLikesFrame.classList.add( 'post-likes-widget', 'jetpack-likes-widget' ); |
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postLikesFrame.name = wrapper.dataset.name; |
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postLikesFrame.src = wrapper.dataset.src; |
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postLikesFrame.height = '55px'; |
| 332 |
postLikesFrame.width = '100%'; |
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postLikesFrame.frameBorder = '0'; |
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postLikesFrame.scrolling = 'no'; |
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postLikesFrame.title = wrapper.dataset.title; |
| 336 |
|
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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.classList.contains( 'comment-likes-widget-placeholder' ) ) { |
| 342 |
const commentLikesFrame = document.createElement( 'iframe' ); |
| 343 |
|
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commentLikesFrame.class = 'comment-likes-widget-frame jetpack-likes-widget-frame'; |
| 345 |
commentLikesFrame.name = wrapper.dataset.name; |
| 346 |
commentLikesFrame.src = wrapper.dataset.src; |
| 347 |
commentLikesFrame.height = '18px'; |
| 348 |
commentLikesFrame.width = '100%'; |
| 349 |
commentLikesFrame.frameBorder = '0'; |
| 350 |
commentLikesFrame.scrolling = 'no'; |
| 351 |
|
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wrapper.querySelector( '.comment-like-feedback' ).after( commentLikesFrame ); |
| 353 |
|
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jetpackCommentLikesLoadedWidgets.push( commentLikesFrame ); |
| 355 |
} |
| 356 |
|
| 357 |
wrapper.classList.remove( 'jetpack-likes-widget-unloaded' ); |
| 358 |
wrapper.classList.add( 'jetpack-likes-widget-loading' ); |
| 359 |
|
| 360 |
wrapper.querySelector( 'iframe' ).addEventListener( 'load', e => { |
| 361 |
JetpackLikesPostMessage( |
| 362 |
{ event: 'loadLikeWidget', name: e.target.name, width: e.target.width }, |
| 363 |
window.frames[ 'likes-master' ] |
| 364 |
); |
| 365 |
|
| 366 |
wrapper.classList.remove( 'jetpack-likes-widget-loading' ); |
| 367 |
wrapper.classList.add( 'jetpack-likes-widget-loaded' ); |
| 368 |
} ); |
| 369 |
} |
| 370 |
|
| 371 |
function jetpackGetUnloadedWidgetsInView() { |
| 372 |
const unloadedWidgets = document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' ); |
| 373 |
|
| 374 |
return [ ...unloadedWidgets ].filter( item => jetpackIsScrolledIntoView( item ) ); |
| 375 |
} |
| 376 |
|
| 377 |
function jetpackIsScrolledIntoView( element ) { |
| 378 |
const top = element.getBoundingClientRect().top; |
| 379 |
const bottom = element.getBoundingClientRect().bottom; |
| 380 |
|
| 381 |
// Allow some slack above and bellow the fold with jetpackLikesLookAhead, |
| 382 |
// with the aim of hiding the transition from unloaded to loaded widget from users. |
| 383 |
return top + jetpackLikesLookAhead >= 0 && bottom <= window.innerHeight + jetpackLikesLookAhead; |
| 384 |
} |
| 385 |
|
| 386 |
function jetpackUnloadScrolledOutWidgets() { |
| 387 |
for ( let i = jetpackCommentLikesLoadedWidgets.length - 1; i >= 0; i-- ) { |
| 388 |
const currentWidgetIframe = jetpackCommentLikesLoadedWidgets[ i ]; |
| 389 |
|
| 390 |
if ( ! jetpackIsScrolledIntoView( currentWidgetIframe ) ) { |
| 391 |
const widgetWrapper = |
| 392 |
currentWidgetIframe && |
| 393 |
currentWidgetIframe.parentElement && |
| 394 |
currentWidgetIframe.parentElement.parentElement; |
| 395 |
|
| 396 |
// Restore parent class to 'unloaded' so this widget can be picked up by queue manager again if needed. |
| 397 |
widgetWrapper.classList.remove( 'jetpack-likes-widget-loaded' ); |
| 398 |
widgetWrapper.classList.remove( 'jetpack-likes-widget-loading' ); |
| 399 |
widgetWrapper.classList.add( 'jetpack-likes-widget-unloaded' ); |
| 400 |
|
| 401 |
// Bring back the loading placeholder into view. |
| 402 |
widgetWrapper |
| 403 |
.querySelectorAll( '.comment-likes-widget-placeholder' ) |
| 404 |
.forEach( item => ( item.style.display = 'block' ) ); |
| 405 |
|
| 406 |
// Remove it from the list of loaded widgets. |
| 407 |
jetpackCommentLikesLoadedWidgets.splice( i, 1 ); |
| 408 |
|
| 409 |
// Remove comment like widget iFrame. |
| 410 |
currentWidgetIframe.remove(); |
| 411 |
} |
| 412 |
} |
| 413 |
} |
| 414 |
|
| 415 |
var jetpackWidgetsDelayedExec = function ( after, fn ) { |
| 416 |
var timer; |
| 417 |
return function () { |
| 418 |
clearTimeout( timer ); |
| 419 |
timer = setTimeout( fn, after ); |
| 420 |
}; |
| 421 |
}; |
| 422 |
|
| 423 |
var jetpackOnScrollStopped = jetpackWidgetsDelayedExec( 250, JetpackLikesWidgetQueueHandler ); |
| 424 |
|
| 425 |
// Load initial batch of widgets, prior to any scrolling events. |
| 426 |
JetpackLikesWidgetQueueHandler(); |
| 427 |
|
| 428 |
// Add event listener to execute queue handler after scroll. |
| 429 |
window.addEventListener( 'scroll', jetpackOnScrollStopped, true ); |
| 430 |
|
