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} } function LazyGroup(node, type) { this.node = node; this.type = type || 'default'; this.position = null; this.showed = false; this.items = []; this.itemLoaded = 0; } LazyGroup.prototype = { getType: function() { return this.type; }, getItems: function() { return this.items; }, allItemsLoaded: function() { return this.items.length == this.itemLoaded; }, updatePosition: function() { this.position = getNodePosition(this.node); }, getPosition: function() { return this.position; }, getNode: function() { return this.node; }, addItem: function(item) { if (this.isShowed()) { this.showItem(item); } this.items.push(item); }, showItem: function(item) { var self = this; item.show(function(event) { self.itemLoaded++; item.loaded(self); }); }, show: function(force) { var self = this; if (this.isShowed()) { return; } if (force === undefined) { force = false; } this.showed = true; this.items.forEach(function(item) { if (!item.isShowed()) { self.showItem(item); } }); this.dispatchShowedEvent(); }, isShowed: function() { return this.showed; 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if (ancestorNode !== null) { return { node: ancestorNode, type: 'footer-widget-area' }; } } if ( (this.node.className && this.node.className.indexOf('portfolio') != -1) || (id && document.querySelector('div.portfolio #' + id) !== null && !(this.node.closest('div.portfolio').classList.contains('extended-products-grid') && this.node.closest('div.portfolio').classList.contains('portfolio-style-justified')) ) ) { var ancestorNode = getAncestorNode(this.node, 'portfolio'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'portfolio' }; } } if ( (this.node.className && this.node.className.indexOf('extended-carousel-grid') != -1) || (id && document.querySelector('div.extended-carousel-grid #' + id) !== null && (this.node.closest('div.extended-carousel-grid').classList.contains('carousel-scroll-init')) ) ) { var ancestorNode = getAncestorNode(this.node, 'extended-carousel-grid'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'products-carousel' }; } } if ( (this.node.className && this.node.className.indexOf('gem-blog-slider') != -1) || (id && document.querySelector('div.gem-blog-slider #' + id) !== null ) ) { var ancestorNode = getAncestorNode(this.node, 'gem-blog-slider'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'blog-slider' }; } } if ( (this.node.className && this.node.className.indexOf('gem-news-type-carousel') != -1) || (id && document.querySelector('div.gem-news-type-carousel #' + id) !== null ) ) { var ancestorNode = getAncestorNode(this.node, 'gem-news-type-carousel'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'gem-news-carousel' }; } } if (id && document.querySelector('div.blog #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'blog'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'blog' }; } } if (id && document.querySelector('div.gem-gallery-grid #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'gem-gallery-grid'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'gallery-grid' }; } } if (id && document.querySelector('div.gem-gallery #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'gem-gallery'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'gallery' }; } } if (id && document.querySelector('div.gem-simple-gallery #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'gem-simple-gallery'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'simple-gallery' }; } } if (id && document.querySelector('div.gem-slideshow #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'gem-slideshow'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'gem-slideshow' }; } } if (id && document.querySelector('div.gem-testimonials #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'gem-testimonials'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'gem-testimonials' }; } } if (id && document.querySelector('div.rev_slider_wrapper #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'rev_slider_wrapper'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'rev_slider' }; } } if (id && document.querySelector('div.wpb_images_carousel #' + id) !== null) { var ancestorNode = getAncestorNode(this.node, 'wpb_images_carousel'); if (ancestorNode !== null) { return { node: ancestorNode, type: 'wpb_images_carousel' }; } } return { node: this.node.parentNode, type: 'default' }; }, imageShowed: function() { var id = this.node.id; if (id && document.querySelector('div.caroufredsel_wrapper #' + id) !== null) { window.dispatchEvent(new window.CustomEvent('resize')); } if (window.jQuery !== undefined && window.jQuery !== null && window.jQuery.waypoints !== undefined && window.jQuery.waypoints !== null && typeof window.jQuery.waypoints === "function" ) { window.jQuery.waypoints('refresh'); } }, loaded: function(group) { var groupItems = group.getItems(); if (group.getType() == 'default' && groupItems.length == 1 && groupItems[0].getType() == 'image') { this.imageShowed(); } if (group.getType() == 'wpb_images_carousel' && group.allItemsLoaded()) { window.dispatchEvent(new window.CustomEvent('resize')); } } }; function LazyItems(options) { options = options || {}; this.options = Object.assign({ visibilityOffset: 300, desktopEnable: true, mobileEnable: true }, options); this.groups = []; this.scrollTop = 0; this.rootHeight = 0; this.checkGroupsProcess = false; this.enabled = false; this.isPageScroller = false; this.isFullpage = false; this.visibilityOffsetFixed = false; this.init(); } LazyItems.prototype = { init: function() { this.checkEnabled(); this.updateRootScrollTop(); this.updateRootSize(); this.initEvents(); this.initQueueNodes(); }, checkEnabled: function() { var isMobile = isMobileDevice(); this.enabled = !(excludedDevices()) && ((isMobile && this.options.mobileEnable) || (!isMobile && this.options.desktopEnable)); }, isEnabled: function() { return this.enabled; }, initQueueNodes: function() { if (window.tgpQueue !== undefined) { this.addNodes(window.tgpQueue.flushNodes()); } }, initEvents: function() { var self = this; addEvent(window, 'resize', function() { self.resizeHandle(); }, true); addEvent(document, 'scroll', function() { self.scrollHandle(); }, true); addEvent(document, 'DOMContentLoaded', function() { self.documentReadyHandle(); }, true); }, resizeHandle: function() { var self = this; setTimeout(function() { self.updateRootScrollTop(); self.updateRootSize(); self.updateGroupsPositions(); self.checkGroups(); }, 0); }, scrollHandle: function() { if (!this.visibilityOffsetFixed) { this.visibilityOffsetFixed = true; this.options.visibilityOffset *= 1.5; } this.updateRootScrollTop(); this.updateGroupsPositions(); this.checkGroups(); }, documentReadyHandle: function() { this.collectCustomItems(); this.detectPageScroller(); this.detectFullpage(); this.updateRootScrollTop(); this.updateRootSize(); this.updateGroupsPositions(); this.checkGroups(); }, detectPageScroller: function() { var self = this; this.isPageScroller = document.body.classList.contains('page-scroller'); if (this.isPageScroller) { addEvent(document, 'page-scroller-updated', function() { self.scrollHandle(); }); } }, detectFullpage: function() { var self = this; this.isFullpage = document.body.classList.contains('thegem-fp'); if (this.isFullpage) { addEvent(document, 'fullpage-updated', function() { self.scrollHandle(); }); } }, hasGroups: function() { return this.groups.length > 0; }, checkGroups: function() { var self = this; if (this.checkGroupsProcess || !this.hasGroups()) { return; } this.checkGroupsProcess = true; this.groups.forEach(function(group) { if (group.isShowed() || !group.hasItems()) { return; } if (self.isVisibleGroup(group)) { self.showGroup(group, false); } }); this.checkGroupsProcess = false; }, isVisibleGroup: function(group) { var rootPosition = this.getRootPosition(), groupPosition = group.getPosition(); if (groupPosition === null) { return true; } if (groupPosition.left == 0 && groupPosition.top == 0 && groupPosition.width == 0 && groupPosition.height == 0) { return false; } return groupPosition.top - this.options.visibilityOffset <= rootPosition.bottom && groupPosition.top + groupPosition.height + this.options.visibilityOffset >= rootPosition.top; }, showGroup: function(group, force) { if (force === undefined) { force = false; } group.show(force); }, showItem: function(item) { item.show(); }, addItem: function(item) { if (!this.isEnabled() || this.isIgnoreItem(item)) { this.showItem(item); return; } this.getItemGroup(item).addItem(item); }, getItemGroup: function(item) { var groupNodeInfo = item.getGroupNodeInfo(), group = this.findGroup(groupNodeInfo.node); if (group === null) { group = new LazyGroup(groupNodeInfo.node, groupNodeInfo.type); group.updatePosition(); if (this.isIgnoreGroup(group) || this.isVisibleGroup(group)) { this.showGroup(group, true); } this.groups.push(group); } return group; }, findGroup: function(node) { for (var i = 0; i < this.groups.length; i++) { if (this.groups[i].getNode() == node) { return this.groups[i]; } } return null; }, isIgnoreItem: function(item) { return false; }, isIgnoreGroup: function(group) { if (group.getType() == 'gem-slideshow' || group.getType() == 'rev_slider') { return true; } return false; }, addNodes: function(nodes) { var self = this; nodes.forEach(function(node) { self.addNode(node); }); }, addNode: function(data) { if (data.node === null) { return; } this.addItem(new LazyItem(data.node, data.data)); }, collectItems: function() { var self = this; document.querySelectorAll('img[data-tgpli-image-inited]').forEach(function(node) { self.addNode(node); }); document.querySelectorAll('.tgpli-background-inited').forEach(function(node) { self.addNode(node); }); }, collectCustomItems: function() { var self = this; document.querySelectorAll('.tgpli-custom-item').forEach(function(node) { self.addNode({ node: node, data: { customItem: true } }); }); }, updateGroupsPositions: function() { this.groups.forEach(function(group) { group.updatePosition(); }); }, updateRootScrollTop: function() { this.scrollTop = getRootScrollTop(); }, updateRootSize: function() { this.rootHeight = document.documentElement.clientHeight; }, getRootPosition: function() { return { top: this.scrollTop, bottom: this.scrollTop + this.rootHeight, height: this.rootHeight }; }, checkGroupShowed: function(node, callback) { if (this.isGroupShowed(node)) { return true; } else { addEvent(node, 'tgpliVisible', function() { callback(node); }, true); return false; } }, isGroupShowed: function(node) { var group = this.findGroup(node); return group === null || group.isShowed(); } }; window.tgpLazyItems = new LazyItems(window.tgpLazyItemsOptions || {}); })(window, document);