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/** |
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* |
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* Credits |
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* |
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* Plugin-Name: Akismet Anti-Spam |
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* Plugin-URI: https://akismet.com/ |
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* Author: Automattic |
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* Author URI: https://automattic.com/wordpress-plugins/ |
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* License: GPLv2 or later |
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* Text Domain: akismet |
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* |
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*/ |
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|
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jQuery(function($) { |
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const MSHOT_REFRESH_DELAY = 6000; |
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const MSHOT_REFRESH_QUERY_ARG = 'mainwp_mshot_refresh'; |
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|
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function mainwp_preview_append_cache_bust(url, token) { |
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if (!url) { |
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return url; |
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} |
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|
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let separator = url.indexOf('?') === -1 ? '?' : '&'; |
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|
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return url + separator + MSHOT_REFRESH_QUERY_ARG + '=' + encodeURIComponent(token + '-' + Date.now()); |
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} |
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|
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function mainwp_preview_get_button_mshot_url(element, requeue) { |
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let attrName = requeue ? 'data-mainwp-mshot-requeue-src' : 'data-mainwp-mshot-src'; |
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let mshotUrl = $(element).attr(attrName); |
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|
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if (mshotUrl) { |
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return mshotUrl; |
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} |
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|
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let linkUrl = $(element).attr('preview-site-url'); |
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|
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if (!linkUrl) { |
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return ''; |
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} |
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|
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mshotUrl = '//s0.wp.com/mshots/v1/' + encodeURIComponent(linkUrl) + '?w=900'; |
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|
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if (requeue) { |
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mshotUrl += '&requeue=true'; |
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} |
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|
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return mshotUrl; |
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} |
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|
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function mainwp_preview_clear_image_recovery(img) { |
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if (img && img.mainwpMshotRecoveryTimer) { |
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clearTimeout(img.mainwpMshotRecoveryTimer); |
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img.mainwpMshotRecoveryTimer = null; |
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} |
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} |
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|
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function mainwp_preview_queue_image_recovery(img) { |
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if (!img || img.dataset.mainwpMshotRecoveryRequested === '1') { |
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return; |
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} |
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|
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let primarySrc = img.getAttribute('data-mainwp-mshot-src') || img.getAttribute('data-src') || img.getAttribute('src'); |
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let requeueSrc = img.getAttribute('data-mainwp-mshot-requeue-src'); |
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|
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if (!primarySrc || !requeueSrc) { |
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return; |
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} |
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|
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img.dataset.mainwpMshotRecoveryRequested = '1'; |
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mainwp_preview_clear_image_recovery(img); |
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|
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// Ask mShots to regenerate the thumbnail once, then retry the canonical URL. |
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img.setAttribute('src', mainwp_preview_append_cache_bust(requeueSrc, 'requeue')); |
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img.mainwpMshotRecoveryTimer = setTimeout(function () { |
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img.setAttribute('src', mainwp_preview_append_cache_bust(primarySrc, 'reload')); |
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}, MSHOT_REFRESH_DELAY); |
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} |
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|
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if (!window.mainwpPreviewImageRecoveryBound) { |
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document.addEventListener('error', function (event) { |
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let target = event.target; |
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|
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if (target && target.tagName === 'IMG') { |
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mainwp_preview_queue_image_recovery(target); |
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} |
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}, true); |
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|
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window.mainwpPreviewImageRecoveryBound = true; |
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} |
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|
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/** |
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* Init site preview function. |
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*/ |
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window.mainwp_preview_init_event = function () { |
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let mshotRemovalTimer = null; |
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let mshotSecondTryTimer = null; |
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let mshotThirdTryTimer = null; |
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let previewTableSelector = '.mainwp-with-preview-table'; |
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let mshotEnabledLinkSelector = 'td span.mainwp-preview-item'; |
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|
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// Show a preview image of the hovered URL. |
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$(previewTableSelector).off('.mainwpPreview').on('click.mainwpPreview', mshotEnabledLinkSelector, function () { |
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clearTimeout(mshotRemovalTimer); |
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|
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if ($('.mainwp-preview-mshot').length > 0) { |
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if ($('.mainwp-preview-mshot:first').data('link') == this) { |
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// The preview is already showing for this link. |
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return; |
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} |
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else { |
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// A new link is being hovered, so remove the old preview. |
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let existingImage = $('.mainwp-preview-mshot .mshot-image').get(0); |
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mainwp_preview_clear_image_recovery(existingImage); |
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$('.mainwp-preview-mshot').remove(); |
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} |
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} |
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|
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clearTimeout(mshotSecondTryTimer); |
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clearTimeout(mshotThirdTryTimer); |
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|
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let primarySrc = mainwp_preview_get_button_mshot_url(this, false); |
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let requeueSrc = mainwp_preview_get_button_mshot_url(this, true); |
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let $image = $('<img />', { |
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src: primarySrc, |
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width: 450, |
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height: 338, |
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class: 'mshot-image' |
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}); |
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let mShot = $('<div class="mainwp-preview-mshot mshot-container"><div class="mshot-arrow"></div></div>'); |
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|
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$image.attr('data-mainwp-mshot-src', primarySrc); |
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$image.attr('data-mainwp-mshot-requeue-src', requeueSrc); |
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mShot.append($image); |
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mShot.data('link', this); |
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|
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let offset = $(this).offset(); |
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|
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mShot.offset({ |
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left: Math.min($(window).width() - 475, offset.left + $(this).width() + 10), // Keep it on the screen if the link is near the edge of the window. |
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top: offset.top + ($(this).height() / 2) - 101 // 101 = top offset of the arrow plus the top border thickness |
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}); |
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|
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// These retries appear to be superfluous if .mshot-image has already loaded, but it's because mShots |
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// can return a "Generating thumbnail..." image if it doesn't have a thumbnail ready, so we need |
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// to retry to see if we can get the newly generated thumbnail. |
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mshotSecondTryTimer = setTimeout(function () { |
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mShot.find('.mshot-image').attr('src', mainwp_preview_append_cache_bust(primarySrc, 'retry-2')); |
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}, MSHOT_REFRESH_DELAY); |
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|
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mshotThirdTryTimer = setTimeout(function () { |
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mShot.find('.mshot-image').attr('src', mainwp_preview_append_cache_bust(primarySrc, 'retry-3')); |
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}, MSHOT_REFRESH_DELAY * 2); |
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|
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$('body').append(mShot); |
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}).on('mouseover.mainwpPreview', 'tr', function () { |
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// When the mouse hovers over a row, begin preloading mshots for links. |
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let linksToPreloadMshotsFor = $(this).find(mshotEnabledLinkSelector); |
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|
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linksToPreloadMshotsFor.each(function () { |
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// Don't attempt to preload an mshot for a single link twice. Browser caching should cover this, but in case of |
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// race conditions, save a flag locally when we've begun trying to preload one. |
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if (!$(this).data('mainwp-preview-mshot-preloaded')) { |
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mainwp_preview_preload_mshot(this); |
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$(this).data('mainwp-preview-mshot-preloaded', true); |
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} |
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}); |
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}); |
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|
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$(document).off('mouseup.mainwpPreview').on('mouseup.mainwpPreview', function () { |
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if ($('.mainwp-preview-mshot').length > 0) { |
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mshotRemovalTimer = setTimeout(function () { |
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clearTimeout(mshotSecondTryTimer); |
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clearTimeout(mshotThirdTryTimer); |
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let previewImage = $('.mainwp-preview-mshot .mshot-image').get(0); |
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|
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mainwp_preview_clear_image_recovery(previewImage); |
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$('.mainwp-preview-mshot').remove(); |
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}, 100); |
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} |
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}); |
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}; |
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|
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// init preview. |
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mainwp_preview_init_event(); |
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|
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/** |
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* Begin loading an mShot preview of a link. |
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* |
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* @param object linkElement Preview trigger element. |
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*/ |
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function mainwp_preview_preload_mshot(linkElement) { |
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let img = new Image(); |
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let primarySrc = mainwp_preview_get_button_mshot_url(linkElement, false); |
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|
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if (primarySrc) { |
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img.src = primarySrc; |
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} |
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} |
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}); |
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