90 lines
2.1 KiB
Plaintext
90 lines
2.1 KiB
Plaintext
define([
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'jquery'
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], function ($) {
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function InfiniteScroll (decorated, $element, options, dataAdapter) {
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this.lastParams = {};
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decorated.call(this, $element, options, dataAdapter);
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this.$loadingMore = this.createLoadingMore();
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this.loading = false;
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}
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InfiniteScroll.prototype.append = function (decorated, data) {
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this.$loadingMore.remove();
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this.loading = false;
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decorated.call(this, data);
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if (this.showLoadingMore(data)) {
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this.$results.append(this.$loadingMore);
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}
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};
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InfiniteScroll.prototype.bind = function (decorated, container, $container) {
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var self = this;
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decorated.call(this, container, $container);
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container.on('query', function (params) {
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self.lastParams = params;
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self.loading = true;
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});
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container.on('query:append', function (params) {
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self.lastParams = params;
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self.loading = true;
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});
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this.$results.on('scroll', function () {
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var isLoadMoreVisible = $.contains(
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document.documentElement,
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self.$loadingMore[0]
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);
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if (self.loading || !isLoadMoreVisible) {
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return;
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}
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var currentOffset = self.$results.offset().top +
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self.$results.outerHeight(false);
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var loadingMoreOffset = self.$loadingMore.offset().top +
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self.$loadingMore.outerHeight(false);
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if (currentOffset + 50 >= loadingMoreOffset) {
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self.loadMore();
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}
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});
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};
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InfiniteScroll.prototype.loadMore = function () {
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this.loading = true;
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var params = $.extend({}, {page: 1}, this.lastParams);
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params.page++;
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this.trigger('query:append', params);
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};
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InfiniteScroll.prototype.showLoadingMore = function (_, data) {
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return data.pagination && data.pagination.more;
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};
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InfiniteScroll.prototype.createLoadingMore = function () {
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var $option = $(
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'<li ' +
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'class="select2-results__option select2-results__option--load-more"' +
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'role="treeitem" aria-disabled="true"></li>'
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);
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var message = this.options.get('translations').get('loadingMore');
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$option.html(message(this.lastParams));
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return $option;
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};
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return InfiniteScroll;
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});
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