263 lines
9.8 KiB
JavaScript
263 lines
9.8 KiB
JavaScript
/**
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* AKSRT AJAX Pagination & Lazy Load
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*/
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(function () {
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"use strict";
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function initAjaxPagination(root) {
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var containers = (root || document).querySelectorAll(".aksrt-pagination-ajax, .ajax-pagination");
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if (!containers.length) return;
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var triggerText = (window.aksrtData && aksrtData.ajaxTrigger) || "加载更多";
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var nomoreText = (window.aksrtData && aksrtData.ajaxNomore) || "没有更多了";
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var loadingText = (window.aksrtData && aksrtData.ajaxLoading) || "正在加载...";
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containers.forEach(function (container) {
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if (container.dataset.aksrtPaginationBound === "1") return;
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container.dataset.aksrtPaginationBound = "1";
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var mode = container.dataset.mode || "load_more";
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var nextPage = parseInt(container.dataset.nextPage, 10) || 2;
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var maxPages = parseInt(container.dataset.maxPages, 10) || 1;
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var isComment = container.classList.contains("aksrt-comment-pagination");
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var postId = container.dataset.postId || "";
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var commentOrder = container.dataset.commentOrder || "newest";
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var loading = false;
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var loadMoreBtn = container.querySelector(".aksrt-load-more-btn, .ajax-next");
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var indicator = container.querySelector(".aksrt-loading-indicator");
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var target = container.previousElementSibling;
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if (target && target.classList && target.classList.contains("content-stream__footer")) {
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target = target.previousElementSibling;
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}
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if (!target && container.parentElement) {
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target = container.parentElement.querySelector(".post-grid, .comment-list, .content-stream__list");
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}
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function showSkeleton() {
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if (!target) return;
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var loader = target.querySelector(".post-ajax-loader");
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if (loader) {
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loader.classList.add("is-loading");
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}
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}
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function hideSkeleton() {
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if (!target) return;
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var loader = target.querySelector(".post-ajax-loader");
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if (loader) {
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loader.classList.remove("is-loading");
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}
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}
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function loadNextPage() {
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if (loading || nextPage > maxPages || !target) return;
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loading = true;
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if (indicator) indicator.style.display = "flex";
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if (loadMoreBtn) {
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loadMoreBtn.classList.add("is-loading");
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loadMoreBtn.textContent = loadingText;
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}
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showSkeleton();
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var action = isComment ? "aksrt_load_more_comments" : "aksrt_load_more_posts";
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var queryContext = container.dataset.queryContext || "";
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var queryVars = container.dataset.queryVars || "";
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var renderConfig = container.dataset.renderConfig || "";
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var body = new URLSearchParams();
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body.set("action", action);
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body.set("nonce", aksrtData.nonce);
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body.set("page", String(nextPage));
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if (queryContext) {
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body.set("query_context", queryContext);
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}
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if (!isComment && queryVars) {
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body.set("query_vars", queryVars);
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}
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if (!isComment && renderConfig) {
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body.set("render_config", renderConfig);
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}
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if (isComment && postId) {
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body.set("post_id", postId);
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body.set("comment_order", commentOrder);
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}
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fetch(aksrtData.ajaxUrl, {
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method: "POST",
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headers: { "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8" },
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credentials: "same-origin",
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body: body.toString(),
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})
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.then(function (r) {
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return r.json();
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})
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.then(function (res) {
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if (res.success && res.data && res.data.html) {
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var temp = document.createElement("div");
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temp.innerHTML = res.data.html;
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var newItems = temp.children;
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while (newItems.length > 0) {
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target.appendChild(newItems[0]);
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}
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nextPage++;
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container.dataset.nextPage = String(nextPage);
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if (typeof initLazyLoad === "function") initLazyLoad();
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if (nextPage > maxPages || !res.data.has_more) {
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if (loadMoreBtn) {
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loadMoreBtn.textContent = nomoreText;
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.classList.add("ajax-nomore");
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loadMoreBtn.style.pointerEvents = "none";
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} else {
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container.innerHTML = '<span class="ajax-nomore">' + nomoreText + '</span>';
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}
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}
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}
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})
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.catch(function () {})
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.finally(function () {
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loading = false;
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hideSkeleton();
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if (indicator) indicator.style.display = "none";
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if (loadMoreBtn && !loadMoreBtn.classList.contains("ajax-nomore")) {
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loadMoreBtn.classList.remove("is-loading");
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loadMoreBtn.textContent = triggerText;
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}
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});
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}
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if (loadMoreBtn) {
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loadMoreBtn.addEventListener("click", function(e) {
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e.preventDefault();
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if (loadMoreBtn.dataset.jumpComments === "1") {
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var jumpInput = container.querySelector(".jump-input");
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if (!jumpInput) return;
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var targetPage = parseInt(jumpInput.value, 10) || 1;
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var max = parseInt(jumpInput.dataset.maxPages || String(maxPages), 10) || maxPages;
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targetPage = Math.max(1, Math.min(max, targetPage));
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var url = new URL(window.location.href);
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url.searchParams.set("cpage", String(targetPage));
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window.location.href = url.toString();
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return;
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}
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if (loadMoreBtn.dataset.jumpArchive === "1") {
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var archiveJumpInput = container.querySelector(".jump-input");
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if (!archiveJumpInput) return;
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var archiveTargetPage = parseInt(archiveJumpInput.value, 10) || 1;
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var archiveMax = parseInt(archiveJumpInput.dataset.maxPages || String(maxPages), 10) || maxPages;
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archiveTargetPage = Math.max(1, Math.min(archiveMax, archiveTargetPage));
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var archiveUrl = new URL(window.location.href);
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archiveUrl.searchParams.set("paged", String(archiveTargetPage));
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window.location.href = archiveUrl.toString();
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return;
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}
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loadNextPage();
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});
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}
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if (mode === "infinite" && "IntersectionObserver" in window) {
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if (isComment && window.aksrtData && aksrtData.commentIasAuto === false) {
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} else {
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var sentinel = document.createElement("div");
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sentinel.className = "aksrt-scroll-sentinel";
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container.appendChild(sentinel);
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var lazyloadAction = container.dataset.lazyloadAction || "";
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var iasMax = isComment
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? ((window.aksrtData && typeof aksrtData.commentIasMax !== "undefined") ? parseInt(aksrtData.commentIasMax, 10) : 0)
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: ((window.aksrtData && typeof aksrtData.iasMax !== "undefined") ? parseInt(aksrtData.iasMax, 10) : 0);
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var initialPage = nextPage - 1;
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var observer = new IntersectionObserver(
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function (entries) {
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if (entries[0].isIntersecting && !loading) {
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if (iasMax > 0 && (nextPage - initialPage) >= iasMax) {
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observer.disconnect();
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if (loadMoreBtn) {
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loadMoreBtn.textContent = nomoreText;
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loadMoreBtn.classList.add("ajax-nomore");
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loadMoreBtn.style.pointerEvents = "none";
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}
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return;
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}
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loadNextPage();
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}
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},
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{ rootMargin: "400px" }
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);
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if (lazyloadAction === "ias") {
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container.classList.add("ias-pending");
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}
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observer.observe(sentinel);
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}
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}
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});
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}
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function initLazyLoad(root) {
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var scope = root || document;
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var lazyImages = scope.querySelectorAll("img.aksrt-lazy");
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if (!lazyImages.length) return;
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if (!("IntersectionObserver" in window)) {
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lazyImages.forEach(function (img) {
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var src = img.dataset.src;
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if (src) {
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img.src = src;
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img.classList.remove("aksrt-lazy");
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img.classList.add("aksrt-loaded");
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}
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var skeleton = img.previousElementSibling;
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if (skeleton && skeleton.classList.contains("aksrt-skeleton")) {
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skeleton.remove();
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}
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});
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return;
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}
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var observer = new IntersectionObserver(function (entries) {
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entries.forEach(function (entry) {
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if (!entry.isIntersecting) return;
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var img = entry.target;
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var src = img.dataset.src;
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if (!src) {
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observer.unobserve(img);
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return;
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}
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var tempImg = new Image();
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tempImg.onload = function () {
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img.src = src;
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img.classList.remove("aksrt-lazy");
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img.classList.add("aksrt-loaded");
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var skeleton = img.previousElementSibling;
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if (skeleton && skeleton.classList.contains("aksrt-skeleton")) {
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skeleton.remove();
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}
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};
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tempImg.onerror = function () {
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img.classList.remove("aksrt-lazy");
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img.classList.add("aksrt-error");
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var skeleton = img.previousElementSibling;
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if (skeleton && skeleton.classList.contains("aksrt-skeleton")) {
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skeleton.remove();
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}
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};
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tempImg.src = src;
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observer.unobserve(img);
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});
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}, {
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rootMargin: "200px 0px",
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threshold: 0.01
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});
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lazyImages.forEach(function (img) {
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observer.observe(img);
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});
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}
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window.AksrtFrontend.register("aksrt-ajax-pagination", function (root) { initAjaxPagination(root); });
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window.AksrtFrontend.register("aksrt-lazy-load", function (root) { initLazyLoad(root); });
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})();
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