| 1 |
/* global wpcom_reblog */ |
| 2 |
|
| 3 |
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 |
| 11 |
|
| 12 |
// Keeps track of loaded comment likes widget so we can unload them when they are scrolled out of view. |
| 13 |
var jetpackCommentLikesLoadedWidgets = []; |
| 14 |
|
| 15 |
var jetpackLikesDocReadyPromise = new Promise( resolve => { |
| 16 |
if ( document.readyState !== 'loading' ) { |
| 17 |
resolve(); |
| 18 |
} else { |
| 19 |
window.addEventListener( 'DOMContentLoaded', () => resolve() ); |
| 20 |
} |
| 21 |
} ); |
| 22 |
|
| 23 |
function JetpackLikesPostMessage( message, target ) { |
| 24 |
if ( typeof message === 'string' ) { |
| 25 |
try { |
| 26 |
message = JSON.parse( message ); |
| 27 |
} catch { |
| 28 |
return; |
| 29 |
} |
| 30 |
} |
| 31 |
|
| 32 |
if ( target && typeof target.postMessage === 'function' ) { |
| 33 |
try { |
| 34 |
target.postMessage( |
| 35 |
JSON.stringify( { |
| 36 |
type: 'likesMessage', |
| 37 |
data: message, |
| 38 |
} ), |
| 39 |
'*' |
| 40 |
); |
| 41 |
} catch { |
| 42 |
// Ignore error |
| 43 |
} |
| 44 |
} |
| 45 |
} |
| 46 |
|
| 47 |
function JetpackLikesBatchHandler() { |
| 48 |
const requests = []; |
| 49 |
document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' ).forEach( widget => { |
| 50 |
if ( jetpackLikesWidgetBatch.indexOf( widget.id ) > -1 ) { |
| 51 |
return; |
| 52 |
} |
| 53 |
|
| 54 |
if ( ! jetpackIsScrolledIntoView( widget ) ) { |
| 55 |
return; |
| 56 |
} |
| 57 |
|
| 58 |
jetpackLikesWidgetBatch.push( widget.id ); |
| 59 |
|
| 60 |
var regex = /like-(post|comment)-wrapper-(\d+)-(\d+)-(\w+)/, |
| 61 |
match = regex.exec( widget.id ), |
| 62 |
info; |
| 63 |
|
| 64 |
if ( ! match || match.length !== 5 ) { |
| 65 |
return; |
| 66 |
} |
| 67 |
|
| 68 |
info = { |
| 69 |
blog_id: match[ 2 ], |
| 70 |
width: widget.width, |
| 71 |
}; |
| 72 |
|
| 73 |
if ( 'post' === match[ 1 ] ) { |
| 74 |
info.post_id = match[ 3 ]; |
| 75 |
} else if ( 'comment' === match[ 1 ] ) { |
| 76 |
info.comment_id = match[ 3 ]; |
| 77 |
} |
| 78 |
|
| 79 |
info.obj_id = match[ 4 ]; |
| 80 |
|
| 81 |
requests.push( info ); |
| 82 |
} ); |
| 83 |
|
| 84 |
if ( requests.length > 0 ) { |
| 85 |
JetpackLikesPostMessage( |
| 86 |
{ event: 'initialBatch', requests: requests }, |
| 87 |
window.frames[ 'likes-master' ] |
| 88 |
); |
| 89 |
} |
| 90 |
} |
| 91 |
|
| 92 |
function JetpackLikesMessageListener( event ) { |
| 93 |
let message = event && event.data; |
| 94 |
if ( typeof message === 'string' ) { |
| 95 |
try { |
| 96 |
message = JSON.parse( message ); |
| 97 |
} catch { |
| 98 |
return; |
| 99 |
} |
| 100 |
} |
| 101 |
|
| 102 |
const type = message && message.type; |
| 103 |
const data = message && message.data; |
| 104 |
|
| 105 |
if ( type !== 'likesMessage' || typeof data.event === 'undefined' ) { |
| 106 |
return; |
| 107 |
} |
| 108 |
|
| 109 |
// We only allow messages from one origin |
| 110 |
const allowedOrigin = 'https://widgets.wp.com'; |
| 111 |
if ( allowedOrigin !== event.origin ) { |
| 112 |
return; |
| 113 |
} |
| 114 |
|
| 115 |
switch ( data.event ) { |
| 116 |
case 'masterReady': |
| 117 |
jetpackLikesDocReadyPromise.then( () => { |
| 118 |
jetpackLikesMasterReady = true; |
| 119 |
|
| 120 |
const stylesData = { |
| 121 |
event: 'injectStyles', |
| 122 |
}; |
| 123 |
const sdTextColor = document.querySelector( '.sd-text-color' ); |
| 124 |
const sdLinkColor = document.querySelector( '.sd-link-color' ); |
| 125 |
const sdTextColorStyles = ( sdTextColor && getComputedStyle( sdTextColor ) ) || {}; |
| 126 |
const sdLinkColorStyles = ( sdLinkColor && getComputedStyle( sdLinkColor ) ) || {}; |
| 127 |
|
| 128 |
// enable reblogs if we're on a single post page |
| 129 |
if ( document.body.classList.contains( 'single' ) ) { |
| 130 |
JetpackLikesPostMessage( { event: 'reblogsEnabled' }, window.frames[ 'likes-master' ] ); |
| 131 |
} |
| 132 |
|
| 133 |
stylesData.textStyles = { |
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color: sdTextColorStyles.color, |
| 135 |
fontFamily: sdTextColorStyles[ 'font-family' ], |
| 136 |
fontSize: sdTextColorStyles[ 'font-size' ], |
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direction: sdTextColorStyles.direction, |
| 138 |
fontWeight: sdTextColorStyles[ 'font-weight' ], |
| 139 |
fontStyle: sdTextColorStyles[ 'font-style' ], |
| 140 |
textDecoration: sdTextColorStyles[ 'text-decoration' ], |
| 141 |
}; |
| 142 |
|
| 143 |
stylesData.linkStyles = { |
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color: sdLinkColorStyles.color, |
| 145 |
fontFamily: sdLinkColorStyles[ 'font-family' ], |
| 146 |
fontSize: sdLinkColorStyles[ 'font-size' ], |
| 147 |
textDecoration: sdLinkColorStyles[ 'text-decoration' ], |
| 148 |
fontWeight: sdLinkColorStyles[ 'font-weight' ], |
| 149 |
fontStyle: sdLinkColorStyles[ 'font-style' ], |
| 150 |
}; |
| 151 |
|
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JetpackLikesPostMessage( stylesData, window.frames[ 'likes-master' ] ); |
| 153 |
|
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JetpackLikesBatchHandler(); |
| 155 |
} ); |
| 156 |
|
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break; |
| 158 |
|
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// We're keeping this for planned future follow ups. |
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// @see: https://github.com/Automattic/jetpack/pull/42361#discussion_r1995338815 |
| 161 |
case 'showLikeWidget': |
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break; |
| 163 |
|
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// We're keeping this for planned future follow ups. |
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// @see: https://github.com/Automattic/jetpack/pull/42361#discussion_r1995338815 |
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case 'showCommentLikeWidget': |
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break; |
| 168 |
|
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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 |
| 172 |
.querySelectorAll( '.jetpack-comment-likes-widget-wrapper' ) |
| 173 |
.forEach( wrapper => wrapper.remove() ); |
| 174 |
break; |
| 175 |
|
| 176 |
case 'clickReblogFlair': |
| 177 |
if ( wpcom_reblog && typeof wpcom_reblog.toggle_reblog_box_flair === 'function' ) { |
| 178 |
wpcom_reblog.toggle_reblog_box_flair( data.obj_id ); |
| 179 |
} |
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break; |
| 181 |
|
| 182 |
case 'hideOtherGravatars': { |
| 183 |
hideLikersPopover(); |
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break; |
| 185 |
} |
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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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|
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if ( ! container ) { |
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break; |
| 192 |
} |
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|
| 194 |
const list = container.querySelector( 'ul' ); |
| 195 |
|
| 196 |
container.style.display = 'none'; |
| 197 |
list.innerHTML = ''; |
| 198 |
|
| 199 |
container |
| 200 |
.querySelectorAll( '.likes-text span' ) |
| 201 |
.forEach( item => ( item.textContent = data.totalLikesLabel ) ); |
| 202 |
|
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( data.likers || [] ).forEach( async ( liker, index ) => { |
| 204 |
if ( liker.profile_URL.substr( 0, 4 ) !== 'http' ) { |
| 205 |
// We only display gravatars with http or https schema |
| 206 |
return; |
| 207 |
} |
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|
| 209 |
const element = document.createElement( 'li' ); |
| 210 |
list.append( element ); |
| 211 |
|
| 212 |
const profileLink = encodeURI( liker.profile_URL ); |
| 213 |
const avatarLink = encodeURI( liker.avatar_URL ); |
| 214 |
element.innerHTML = `<a href="${ profileLink }" rel="nofollow" target="_parent" class="wpl-liker"> |
| 215 |
<img src="${ avatarLink }" |
| 216 |
alt="" |
| 217 |
style="width: 28px; height: 28px;" /> |
| 218 |
<span></span> |
| 219 |
</a>`; |
| 220 |
|
| 221 |
// Add some extra attributes through native methods, to ensure strings are sanitized. |
| 222 |
element.classList.add( liker.css_class ); |
| 223 |
element.querySelector( 'img' ).alt = data.avatarAltTitle.replace( '%s', liker.name ); |
| 224 |
element.querySelector( 'span' ).innerText = liker.name; |
| 225 |
|
| 226 |
if ( index === data.likers.length - 1 ) { |
| 227 |
element.addEventListener( 'keydown', e => { |
| 228 |
if ( e.key === 'Tab' && ! e.shiftKey ) { |
| 229 |
e.preventDefault(); |
| 230 |
hideLikersPopover(); |
| 231 |
|
| 232 |
JetpackLikesPostMessage( |
| 233 |
{ event: 'focusLikesCount', parent: data.parent }, |
| 234 |
window.frames[ 'likes-master' ] |
| 235 |
); |
| 236 |
} |
| 237 |
} ); |
| 238 |
} |
| 239 |
} ); |
| 240 |
|
| 241 |
const positionPopup = function () { |
| 242 |
const containerStyle = getComputedStyle( container ); |
| 243 |
const isRtl = containerStyle.direction === 'rtl'; |
| 244 |
|
| 245 |
const el = document.querySelector( `*[name='${ data.parent }']` ); |
| 246 |
const rect = el.getBoundingClientRect(); |
| 247 |
const win = el.ownerDocument.defaultView; |
| 248 |
const offset = { |
| 249 |
top: rect.top + win.pageYOffset, |
| 250 |
left: rect.left + win.pageXOffset, |
| 251 |
}; |
| 252 |
|
| 253 |
let containerLeft; |
| 254 |
container.style.top = offset.top + data.position.top - 1 + 'px'; |
| 255 |
|
| 256 |
if ( isRtl ) { |
| 257 |
const visibleAvatarsCount = data && data.likers ? Math.min( data.likers.length, 5 ) : 0; |
| 258 |
// 24px is the width of the avatar + 4px is the padding between avatars |
| 259 |
containerLeft = offset.left + data.position.left + 24 * visibleAvatarsCount + 4; |
| 260 |
container.style.transform = 'translateX(-100%)'; |
| 261 |
} else { |
| 262 |
containerLeft = offset.left + data.position.left; |
| 263 |
} |
| 264 |
container.style.left = containerLeft + 'px'; |
| 265 |
|
| 266 |
// If the popup overflows viewport width, we should show it on the next line. |
| 267 |
// Push it offscreen to calculated rendered width. |
| 268 |
container.style.left = '-9999px'; |
| 269 |
container.style.display = 'block'; |
| 270 |
|
| 271 |
// If the popup exceeds the viewport width, |
| 272 |
// flip the position of the popup. |
| 273 |
const containerWidth = container.offsetWidth; |
| 274 |
const containerRight = containerLeft + containerWidth; |
| 275 |
if ( containerRight > win.innerWidth ) { |
| 276 |
containerLeft = rect.right - containerWidth; |
| 277 |
} |
| 278 |
|
| 279 |
// Set the container left |
| 280 |
container.style.left = containerLeft + 'px'; |
| 281 |
container.setAttribute( 'aria-hidden', 'false' ); |
| 282 |
}; |
| 283 |
|
| 284 |
positionPopup(); |
| 285 |
container.focus(); |
| 286 |
|
| 287 |
const debounce = function ( func, wait ) { |
| 288 |
var timeout; |
| 289 |
return function () { |
| 290 |
var context = this; |
| 291 |
var args = arguments; |
| 292 |
clearTimeout( timeout ); |
| 293 |
timeout = setTimeout( function () { |
| 294 |
func.apply( context, args ); |
| 295 |
}, wait ); |
| 296 |
}; |
| 297 |
}; |
| 298 |
|
| 299 |
const debouncedPositionPopup = debounce( positionPopup, 100 ); |
| 300 |
|
| 301 |
// Keep a reference of this function in the element itself |
| 302 |
// so that we can destroy it later |
| 303 |
container.__resizeHandler = debouncedPositionPopup; |
| 304 |
|
| 305 |
// When window is resized, resize the popup. |
| 306 |
window.addEventListener( 'resize', debouncedPositionPopup ); |
| 307 |
|
| 308 |
container.focus(); |
| 309 |
} |
| 310 |
} |
| 311 |
} |
| 312 |
|
| 313 |
window.addEventListener( 'message', JetpackLikesMessageListener ); |
| 314 |
|
| 315 |
function hideLikersPopover() { |
| 316 |
const container = document.querySelector( '#likes-other-gravatars' ); |
| 317 |
|
| 318 |
if ( container ) { |
| 319 |
container.style.display = 'none'; |
| 320 |
container.setAttribute( 'aria-hidden', 'true' ); |
| 321 |
|
| 322 |
// Remove the resize event listener and cleanup. |
| 323 |
const resizeHandler = container.__resizeHandler; |
| 324 |
if ( resizeHandler ) { |
| 325 |
window.removeEventListener( 'resize', resizeHandler ); |
| 326 |
delete container.__resizeHandler; |
| 327 |
} |
| 328 |
} |
| 329 |
} |
| 330 |
|
| 331 |
document.addEventListener( 'click', hideLikersPopover ); |
| 332 |
|
| 333 |
function JetpackLikesWidgetQueueHandler() { |
| 334 |
var wrapperID; |
| 335 |
|
| 336 |
if ( ! jetpackLikesMasterReady ) { |
| 337 |
// The master iframe emits `masterReady` a single time, when it finishes loading. On |
| 338 |
// script-heavy pages it can finish loading — and emit — before this script attaches its |
| 339 |
// message listener above, so that one event is missed and the queue never starts. Ping the |
| 340 |
// master iframe while we wait so it re-emits `masterReady` once both it and our listener |
| 341 |
// are ready. |
| 342 |
JetpackLikesPostMessage( { event: 'queryMasterReady' }, window.frames[ 'likes-master' ] ); |
| 343 |
setTimeout( JetpackLikesWidgetQueueHandler, 500 ); |
| 344 |
return; |
| 345 |
} |
| 346 |
|
| 347 |
// Restore widgets to initial unloaded state when they are scrolled out of view. |
| 348 |
jetpackUnloadScrolledOutWidgets(); |
| 349 |
|
| 350 |
var unloadedWidgetsInView = jetpackGetUnloadedWidgetsInView(); |
| 351 |
|
| 352 |
if ( unloadedWidgetsInView.length > 0 ) { |
| 353 |
// Grab any unloaded widgets for a batch request |
| 354 |
JetpackLikesBatchHandler(); |
| 355 |
} |
| 356 |
|
| 357 |
for ( var i = 0, length = unloadedWidgetsInView.length; i <= length - 1; i++ ) { |
| 358 |
wrapperID = unloadedWidgetsInView[ i ].id; |
| 359 |
|
| 360 |
if ( ! wrapperID ) { |
| 361 |
continue; |
| 362 |
} |
| 363 |
|
| 364 |
jetpackLoadLikeWidgetIframe( wrapperID ); |
| 365 |
} |
| 366 |
} |
| 367 |
|
| 368 |
function jetpackLoadLikeWidgetIframe( wrapperID ) { |
| 369 |
if ( typeof wrapperID === 'undefined' ) { |
| 370 |
return; |
| 371 |
} |
| 372 |
|
| 373 |
const wrapper = document.querySelector( '#' + wrapperID ); |
| 374 |
wrapper.querySelectorAll( 'iframe' ).forEach( iFrame => iFrame.remove() ); |
| 375 |
|
| 376 |
const placeholder = wrapper.querySelector( '.likes-widget-placeholder' ); |
| 377 |
|
| 378 |
// Post like iframe |
| 379 |
if ( placeholder && placeholder.classList.contains( 'post-likes-widget-placeholder' ) ) { |
| 380 |
const postLikesFrame = document.createElement( 'iframe' ); |
| 381 |
|
| 382 |
postLikesFrame.classList.add( 'post-likes-widget', 'jetpack-likes-widget' ); |
| 383 |
postLikesFrame.name = wrapper.dataset.name; |
| 384 |
postLikesFrame.src = wrapper.dataset.src; |
| 385 |
postLikesFrame.height = '55px'; |
| 386 |
postLikesFrame.width = '100%'; |
| 387 |
postLikesFrame.frameBorder = '0'; |
| 388 |
postLikesFrame.scrolling = 'no'; |
| 389 |
postLikesFrame.title = wrapper.dataset.title; |
| 390 |
|
| 391 |
placeholder.after( postLikesFrame ); |
| 392 |
} |
| 393 |
|
| 394 |
// Comment like iframe |
| 395 |
if ( placeholder.classList.contains( 'comment-likes-widget-placeholder' ) ) { |
| 396 |
const commentLikesFrame = document.createElement( 'iframe' ); |
| 397 |
|
| 398 |
commentLikesFrame.class = 'comment-likes-widget-frame jetpack-likes-widget-frame'; |
| 399 |
commentLikesFrame.name = wrapper.dataset.name; |
| 400 |
commentLikesFrame.src = wrapper.dataset.src; |
| 401 |
commentLikesFrame.height = '18px'; |
| 402 |
commentLikesFrame.width = '100%'; |
| 403 |
commentLikesFrame.frameBorder = '0'; |
| 404 |
commentLikesFrame.scrolling = 'no'; |
| 405 |
|
| 406 |
wrapper.querySelector( '.comment-like-feedback' ).after( commentLikesFrame ); |
| 407 |
|
| 408 |
jetpackCommentLikesLoadedWidgets.push( commentLikesFrame ); |
| 409 |
} |
| 410 |
|
| 411 |
wrapper.classList.remove( 'jetpack-likes-widget-unloaded' ); |
| 412 |
wrapper.classList.add( 'jetpack-likes-widget-loading' ); |
| 413 |
|
| 414 |
wrapper.querySelector( 'iframe' ).addEventListener( 'load', e => { |
| 415 |
JetpackLikesPostMessage( |
| 416 |
{ event: 'loadLikeWidget', name: e.target.name, width: e.target.width }, |
| 417 |
window.frames[ 'likes-master' ] |
| 418 |
); |
| 419 |
|
| 420 |
wrapper.classList.remove( 'jetpack-likes-widget-loading' ); |
| 421 |
wrapper.classList.add( 'jetpack-likes-widget-loaded' ); |
| 422 |
} ); |
| 423 |
} |
| 424 |
|
| 425 |
function jetpackGetUnloadedWidgetsInView() { |
| 426 |
const unloadedWidgets = document.querySelectorAll( 'div.jetpack-likes-widget-unloaded' ); |
| 427 |
|
| 428 |
return [ ...unloadedWidgets ].filter( item => jetpackIsScrolledIntoView( item ) ); |
| 429 |
} |
| 430 |
|
| 431 |
function jetpackIsScrolledIntoView( element ) { |
| 432 |
const top = element.getBoundingClientRect().top; |
| 433 |
const bottom = element.getBoundingClientRect().bottom; |
| 434 |
|
| 435 |
// Allow some slack above and bellow the fold with jetpackLikesLookAhead, |
| 436 |
// with the aim of hiding the transition from unloaded to loaded widget from users. |
| 437 |
return top + jetpackLikesLookAhead >= 0 && bottom <= window.innerHeight + jetpackLikesLookAhead; |
| 438 |
} |
| 439 |
|
| 440 |
function jetpackUnloadScrolledOutWidgets() { |
| 441 |
for ( let i = jetpackCommentLikesLoadedWidgets.length - 1; i >= 0; i-- ) { |
| 442 |
const currentWidgetIframe = jetpackCommentLikesLoadedWidgets[ i ]; |
| 443 |
|
| 444 |
if ( ! jetpackIsScrolledIntoView( currentWidgetIframe ) ) { |
| 445 |
const widgetWrapper = |
| 446 |
currentWidgetIframe && |
| 447 |
currentWidgetIframe.parentElement && |
| 448 |
currentWidgetIframe.parentElement.parentElement; |
| 449 |
|
| 450 |
// Restore parent class to 'unloaded' so this widget can be picked up by queue manager again if needed. |
| 451 |
widgetWrapper.classList.remove( 'jetpack-likes-widget-loaded' ); |
| 452 |
widgetWrapper.classList.remove( 'jetpack-likes-widget-loading' ); |
| 453 |
widgetWrapper.classList.add( 'jetpack-likes-widget-unloaded' ); |
| 454 |
|
| 455 |
// Remove it from the list of loaded widgets. |
| 456 |
jetpackCommentLikesLoadedWidgets.splice( i, 1 ); |
| 457 |
|
| 458 |
// Remove comment like widget iFrame. |
| 459 |
currentWidgetIframe.remove(); |
| 460 |
} |
| 461 |
} |
| 462 |
} |
| 463 |
|
| 464 |
var jetpackWidgetsDelayedExec = function ( after, fn ) { |
| 465 |
var timer; |
| 466 |
return function () { |
| 467 |
clearTimeout( timer ); |
| 468 |
timer = setTimeout( fn, after ); |
| 469 |
}; |
| 470 |
}; |
| 471 |
|
| 472 |
var jetpackOnScrollStopped = jetpackWidgetsDelayedExec( 250, JetpackLikesWidgetQueueHandler ); |
| 473 |
|
| 474 |
// Load initial batch of widgets, prior to any scrolling events. |
| 475 |
JetpackLikesWidgetQueueHandler(); |
| 476 |
|
| 477 |
// Add event listener to execute queue handler after scroll. |
| 478 |
window.addEventListener( 'scroll', jetpackOnScrollStopped, true ); |
| 479 |
|
