456 lines
17 KiB
JavaScript
456 lines
17 KiB
JavaScript
/**
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* AKSRT Enhancements — 全局 UI 增强
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*
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* 包含：图片灯箱、滚动方向感知
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*
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* @package AKSRT
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*/
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(function () {
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'use strict';
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/* ============================================================
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* 1. 图片灯箱 — zoom / thumbnails / slideshow / fullscreen /
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* mousewheel / origin animation / smart download
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* ============================================================ */
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var lightboxEl = null;
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var lightboxImg = null;
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var lightboxCaption = null;
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var lightboxCounter = null;
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var lightboxThumbsWrap = null;
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var currentGallery = [];
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var currentIndex = 0;
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var currentZoom = 1;
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var autoplayTimer = null;
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var isAutoplay = false;
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var EXCLUDE_SEL = '.no-imgbox,.no-lightbox,.avatar,.img-icon,.avatar-badge,.smilie-icon,.aksrt-avatar';
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var TRIGGER_SEL = '.entry-content img, .wp-posts-content img, .aksrt-lightbox-trigger img, [data-aksrt-lightbox] img, .imgbox-container img, .comment-content .box-img img, a[data-imgbox] img';
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var CONTAINER_SEL = '.entry-content, .wp-posts-content, .aksrt-lightbox-trigger, [data-aksrt-lightbox], .imgbox-container, .comment-content';
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var MAX_ZOOM_DESKTOP = 2;
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var MAX_ZOOM_MOBILE = 3;
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function lightboxFlag(key, fallback) {
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var w = window._win || (window.aksrtData && window.aksrtData.imgbox) || {};
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if (w[key] === undefined || w[key] === null || w[key] === '') return fallback;
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return w[key] === true || w[key] === 1 || w[key] === '1';
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}
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function lightboxEnabled() {
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return lightboxFlag('imgbox', true);
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}
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function resolveFullUrl(img) {
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var full = img.getAttribute('data-full-url') || img.getAttribute('data-src') || '';
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if (full) return full;
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var src = img.src || '';
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// thumbnail → original: strip -NNNxNNN suffix
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return src.replace(/-\d+x\d+(\.[a-z]+)$/i, '$1');
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}
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function isNoLightbox(img) {
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if (img.closest(EXCLUDE_SEL)) return true;
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// parent anchor that does NOT point to an image
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var parentA = img.closest('a');
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if (parentA) {
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var href = parentA.getAttribute('href') || '';
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if (href && !/\.(jpe?g|png|gif|webp|avif|svg|bmp)(\?|$)/i.test(href) && !parentA.hasAttribute('data-imgbox')) {
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return true;
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}
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}
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return false;
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}
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function createLightbox() {
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if (!lightboxEnabled()) return;
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if (lightboxEl) return;
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lightboxEl = document.createElement('div');
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lightboxEl.className = 'aksrt-lightbox';
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lightboxEl.innerHTML =
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'<div class="aksrt-lightbox__toolbar">' +
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'<span class="aksrt-lightbox__counter"></span>' +
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'<button type="button" class="aksrt-lightbox__tool toggle-zoom" title="缩放"><i class="fa fas fa-search-plus"></i></button>' +
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'<button type="button" class="aksrt-lightbox__tool toggle-thumbs" title="缩略图"><i class="fa fas fa-th"></i></button>' +
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'<button type="button" class="aksrt-lightbox__tool toggle-play" title="幻灯片"><i class="fa fas fa-play"></i></button>' +
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'<button type="button" class="aksrt-lightbox__tool toggle-full" title="全屏"><i class="fa fas fa-expand"></i></button>' +
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'<button type="button" class="aksrt-lightbox__tool aksrt-lightbox__download" title="下载"><i class="fa fas fa-download"></i></button>' +
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'<button type="button" class="aksrt-lightbox__tool aksrt-lightbox__close" title="关闭"><i class="fa fas fa-times"></i></button>' +
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'</div>' +
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'<button type="button" class="aksrt-lightbox__nav aksrt-lightbox__nav--prev" aria-label="上一张"><i class="fa fas fa-chevron-left"></i></button>' +
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'<div class="aksrt-lightbox__stage"><img class="aksrt-lightbox__img" src="" alt=""></div>' +
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'<button type="button" class="aksrt-lightbox__nav aksrt-lightbox__nav--next" aria-label="下一张"><i class="fa fas fa-chevron-right"></i></button>' +
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'<div class="aksrt-lightbox__caption"></div>' +
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'<div class="aksrt-lightbox__thumbs" hidden></div>';
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document.body.appendChild(lightboxEl);
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lightboxImg = lightboxEl.querySelector('.aksrt-lightbox__img');
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lightboxCaption = lightboxEl.querySelector('.aksrt-lightbox__caption');
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lightboxCounter = lightboxEl.querySelector('.aksrt-lightbox__counter');
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lightboxThumbsWrap = lightboxEl.querySelector('.aksrt-lightbox__thumbs');
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// Apply window._win imgbox feature flags
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var zoomBtn = lightboxEl.querySelector('.toggle-zoom');
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var thumbsBtn = lightboxEl.querySelector('.toggle-thumbs');
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var playBtn = lightboxEl.querySelector('.toggle-play');
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var fullBtn = lightboxEl.querySelector('.toggle-full');
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var downBtn = lightboxEl.querySelector('.aksrt-lightbox__download');
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if (zoomBtn) zoomBtn.hidden = !lightboxFlag('imgbox_zoom', true);
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if (thumbsBtn) thumbsBtn.hidden = !lightboxFlag('imgbox_thumbs', true);
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if (playBtn) playBtn.hidden = !lightboxFlag('imgbox_play', false);
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if (fullBtn) fullBtn.hidden = !lightboxFlag('imgbox_full', true);
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if (downBtn) downBtn.hidden = !lightboxFlag('imgbox_down', false);
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// Close
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lightboxEl.querySelector('.aksrt-lightbox__close').addEventListener('click', function (e) { e.stopPropagation(); closeLightbox(); });
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lightboxEl.addEventListener('click', function (e) { if (e.target === lightboxEl || e.target.classList.contains('aksrt-lightbox__stage')) closeLightbox(); });
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// Nav
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lightboxEl.querySelector('.aksrt-lightbox__nav--prev').addEventListener('click', function (e) { e.stopPropagation(); navigateLightbox(-1); });
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lightboxEl.querySelector('.aksrt-lightbox__nav--next').addEventListener('click', function (e) { e.stopPropagation(); navigateLightbox(1); });
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// Keyboard
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document.addEventListener('keydown', function (e) {
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if (!lightboxEl.classList.contains('is-open')) return;
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if (e.key === 'Escape') closeLightbox();
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if (e.key === 'ArrowLeft') navigateLightbox(-1);
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if (e.key === 'ArrowRight') navigateLightbox(1);
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});
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// Mousewheel nav
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lightboxEl.addEventListener('wheel', function (e) {
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if (!lightboxEl.classList.contains('is-open')) return;
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if (currentZoom > 1) return; // don't nav when zoomed
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e.preventDefault();
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if (e.deltaY > 0) navigateLightbox(1);
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else navigateLightbox(-1);
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}, { passive: false });
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// Image click → toggle zoom
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lightboxImg.addEventListener('click', function (e) { e.stopPropagation(); toggleZoom(); });
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// Double-click → zoom in
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lightboxImg.addEventListener('dblclick', function (e) {
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e.stopPropagation();
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var maxZoom = window.innerWidth < 768 ? MAX_ZOOM_MOBILE : MAX_ZOOM_DESKTOP;
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if (currentZoom < maxZoom) setZoom(maxZoom);
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else setZoom(1);
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});
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// Pinch zoom (mobile)
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var pinchStart = 0;
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lightboxEl.addEventListener('touchstart', function (e) {
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if (e.touches.length === 2) {
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pinchStart = Math.hypot(
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e.touches[1].clientX - e.touches[0].clientX,
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e.touches[1].clientY - e.touches[0].clientY
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);
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}
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}, { passive: true });
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lightboxEl.addEventListener('touchmove', function (e) {
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if (e.touches.length === 2 && pinchStart > 0) {
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var dist = Math.hypot(
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e.touches[1].clientX - e.touches[0].clientX,
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e.touches[1].clientY - e.touches[0].clientY
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);
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var maxZoom = window.innerWidth < 768 ? MAX_ZOOM_MOBILE : MAX_ZOOM_DESKTOP;
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var newZoom = Math.min(maxZoom, Math.max(1, currentZoom * (dist / pinchStart)));
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setZoom(newZoom);
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pinchStart = dist;
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}
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}, { passive: true });
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lightboxEl.addEventListener('touchend', function () { pinchStart = 0; }, { passive: true });
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// Touch swipe/pull-dismiss (skip when zoomed)
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var touchStartY = 0, touchStartX = 0, isSwiping = false;
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lightboxEl.addEventListener('touchstart', function (e) {
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if (e.touches.length !== 1 || currentZoom > 1.05) return;
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touchStartY = e.touches[0].clientY;
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touchStartX = e.touches[0].clientX;
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isSwiping = false;
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}, { passive: true });
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lightboxEl.addEventListener('touchmove', function (e) {
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if (e.touches.length !== 1 || currentZoom > 1.05) return;
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var dy = e.touches[0].clientY - touchStartY;
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var dx = e.touches[0].clientX - touchStartX;
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if (Math.abs(dy) > Math.abs(dx) && dy > 30) {
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isSwiping = true;
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var opacity = Math.max(0.2, (150 - dy) / 80);
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lightboxImg.style.transform = 'translate3d(0, ' + dy + 'px, 0) scale(' + currentZoom + ')';
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lightboxImg.style.opacity = String(Math.min(1, opacity));
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}
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}, { passive: true });
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lightboxEl.addEventListener('touchend', function () {
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if (isSwiping) {
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closeLightbox();
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lightboxImg.style.transform = '';
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lightboxImg.style.opacity = '';
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}
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isSwiping = false;
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}, { passive: true });
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// Download
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lightboxEl.querySelector('.aksrt-lightbox__download').addEventListener('click', function (e) {
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e.stopPropagation();
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var item = currentGallery[currentIndex];
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if (!item || !item.src) return;
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var a = document.createElement('a');
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var fullSrc = item.fullSrc || item.src;
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a.href = fullSrc;
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a.download = fullSrc.substring(fullSrc.lastIndexOf('/') + 1) || 'image';
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document.body.appendChild(a);
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a.click();
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a.remove();
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});
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// Zoom button
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lightboxEl.querySelector('.toggle-zoom').addEventListener('click', function (e) { e.stopPropagation(); toggleZoom(); });
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// Thumbnails toggle
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lightboxEl.querySelector('.toggle-thumbs').addEventListener('click', function (e) {
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e.stopPropagation();
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lightboxThumbsWrap.hidden = !lightboxThumbsWrap.hidden;
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});
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// Slideshow toggle
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lightboxEl.querySelector('.toggle-play').addEventListener('click', function (e) {
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e.stopPropagation();
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toggleAutoplay();
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});
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// Fullscreen
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lightboxEl.querySelector('.toggle-full').addEventListener('click', function (e) {
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e.stopPropagation();
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toggleFullscreen();
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});
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document.addEventListener('fullscreenchange', function () {
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var icon = lightboxEl.querySelector('.toggle-full i');
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if (document.fullscreenElement) {
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lightboxEl.classList.add('full-screen');
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icon.className = 'fa fas fa-compress';
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} else {
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lightboxEl.classList.remove('full-screen');
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icon.className = 'fa fas fa-expand';
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}
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});
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}
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function setZoom(z) {
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currentZoom = z;
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lightboxImg.style.transform = 'scale(' + z + ')';
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lightboxEl.classList.toggle('is-zoomed', z > 1);
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}
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function toggleZoom() {
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var maxZoom = window.innerWidth < 768 ? MAX_ZOOM_MOBILE : MAX_ZOOM_DESKTOP;
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setZoom(currentZoom > 1 ? 1 : maxZoom);
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}
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function toggleAutoplay() {
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var icon = lightboxEl.querySelector('.toggle-play i');
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if (isAutoplay) {
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clearInterval(autoplayTimer);
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isAutoplay = false;
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icon.className = 'fa fas fa-play';
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} else {
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if (currentGallery.length < 2) return;
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isAutoplay = true;
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icon.className = 'fa fas fa-pause';
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autoplayTimer = setInterval(function () { navigateLightbox(1); }, 3000);
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}
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}
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function toggleFullscreen() {
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var rfs = lightboxEl.requestFullscreen || lightboxEl.webkitRequestFullscreen || lightboxEl.msRequestFullscreen;
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if (document.fullscreenElement || document.webkitFullscreenElement) {
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(document.exitFullscreen || document.webkitExitFullscreen || document.msExitFullscreen).call(document);
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} else if (rfs) {
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rfs.call(lightboxEl);
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}
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}
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function buildThumbnails() {
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if (!lightboxThumbsWrap) return;
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lightboxThumbsWrap.innerHTML = '';
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currentGallery.forEach(function (item, i) {
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var thumb = document.createElement('img');
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thumb.src = item.src;
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thumb.className = 'aksrt-lightbox__thumb' + (i === currentIndex ? ' is-active' : '');
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thumb.addEventListener('click', function (e) {
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e.stopPropagation();
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showLightboxImage(i);
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});
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lightboxThumbsWrap.appendChild(thumb);
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});
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}
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function syncThumbActive() {
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if (!lightboxThumbsWrap) return;
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var thumbs = lightboxThumbsWrap.querySelectorAll('.aksrt-lightbox__thumb');
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thumbs.forEach(function (t, i) { t.classList.toggle('is-active', i === currentIndex); });
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var active = thumbs[currentIndex];
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if (active) active.scrollIntoView({ inline: 'center', block: 'nearest', behavior: 'smooth' });
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}
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function openLightbox(src, caption, gallery, index, originEl) {
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createLightbox();
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currentGallery = gallery || [{ src: src, caption: caption || '' }];
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currentIndex = index || 0;
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currentZoom = 1;
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// Origin animation
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if (originEl) {
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var rect = originEl.getBoundingClientRect();
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lightboxEl.style.setProperty('--imgbox-origin-top', (rect.top + rect.height / 2) + 'px');
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lightboxEl.style.setProperty('--imgbox-origin-left', (rect.left + rect.width / 2) + 'px');
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lightboxEl.classList.add('from-origin');
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} else {
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lightboxEl.classList.remove('from-origin');
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}
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showLightboxImage(currentIndex);
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buildThumbnails();
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lightboxEl.classList.add('is-open');
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document.body.style.overflow = 'hidden';
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lightboxEl.dispatchEvent(new CustomEvent('aksrt:lightbox-open', { bubbles: true }));
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}
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function showLightboxImage(index) {
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if (index < 0) index = currentGallery.length - 1;
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if (index >= currentGallery.length) index = 0;
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currentIndex = index;
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setZoom(1);
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var item = currentGallery[currentIndex];
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lightboxImg.src = item.fullSrc || item.src;
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lightboxImg.alt = item.caption || '';
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lightboxCaption.textContent = item.caption || '';
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lightboxCaption.style.display = item.caption ? '' : 'none';
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if (currentGallery.length > 1) {
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lightboxCounter.textContent = (currentIndex + 1) + ' / ' + currentGallery.length;
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lightboxCounter.style.display = '';
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} else {
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lightboxCounter.style.display = 'none';
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}
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syncThumbActive();
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}
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function navigateLightbox(dir) {
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showLightboxImage(currentIndex + dir);
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}
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function closeLightbox() {
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if (!lightboxEl) return;
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if (isAutoplay) toggleAutoplay();
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lightboxEl.classList.remove('is-open', 'is-zoomed', 'from-origin');
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document.body.style.overflow = '';
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lightboxThumbsWrap.hidden = true;
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if (document.fullscreenElement) {
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(document.exitFullscreen || document.webkitExitFullscreen || document.msExitFullscreen).call(document);
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}
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}
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// Auto-bind: expanded trigger scope + exclusion rules
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function initLightbox() {
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document.addEventListener('click', function (e) {
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// Also support a[data-imgbox]
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var anchor = e.target.closest('a[data-imgbox]');
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if (anchor) {
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e.preventDefault();
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var href = anchor.getAttribute('href') || anchor.getAttribute('data-imgbox');
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openLightbox(href, '', [{ src: href, fullSrc: href, caption: '' }], 0, anchor);
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return;
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}
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var img = e.target.closest(TRIGGER_SEL);
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if (!img) return;
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if (img.width < 100 || img.height < 100) return;
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if (!lightboxEnabled() || isNoLightbox(img)) return;
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e.preventDefault();
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var container = img.closest(CONTAINER_SEL);
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if (!container) return;
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var allImages = container.querySelectorAll('img');
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var gallery = [];
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var foundIndex = 0;
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allImages.forEach(function (el) {
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if (el.width < 100 || el.height < 100) return;
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if (isNoLightbox(el)) return;
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var full = resolveFullUrl(el);
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var caption = el.alt || '';
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var figcaption = el.closest('figure') ? el.closest('figure').querySelector('figcaption') : null;
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if (figcaption) caption = figcaption.textContent;
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gallery.push({ src: el.dataset.src || el.src, fullSrc: full, caption: caption });
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if (el === img) foundIndex = gallery.length - 1;
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});
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if (gallery.length > 0) {
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openLightbox(img.dataset.src || img.src, img.alt, gallery, foundIndex, img);
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}
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});
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}
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// 暴露到全局
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window.AksrtLightbox = {
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open: openLightbox,
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close: closeLightbox,
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};
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/* ============================================================
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* 2. 滚动方向感知
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* ============================================================ */
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// Scroll direction is now handled by aksrt-runtime.js body scroll bus
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// (body.scroll-down / body.scroll-up / body.body-scroll).
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// This stub syncs the legacy aksrt-* prefixed classes for backward compat.
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function initScrollDirection() {
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var body = document.body;
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function sync() {
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body.classList.toggle('aksrt-body-scroll', body.classList.contains('body-scroll'));
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body.classList.toggle('aksrt-scroll-down', body.classList.contains('scroll-down'));
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body.classList.toggle('aksrt-scroll-up', body.classList.contains('scroll-up'));
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body.classList.add('aksrt-scrolling');
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clearTimeout(body._aksrtScrollTimer);
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body._aksrtScrollTimer = setTimeout(function () {
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body.classList.remove('aksrt-scrolling');
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}, 300);
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}
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function onScroll() {
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requestAnimationFrame(sync);
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}
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window.addEventListener('scroll', onScroll, { passive: true });
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}
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/* ============================================================
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* 3. 导航溢出折叠
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* 由 Zibll main.js 的 navFolding 负责。
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* 此处不再重复实现，避免两套逻辑争抢 .aksrt-nav-more 节点
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* 触发 NotFoundError: insertBefore (moreLi 已被对方 remove)。
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* ============================================================ */
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|
|
|
/* ============================================================
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* 初始化入口
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* ============================================================ */
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document.addEventListener('DOMContentLoaded', function () {
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initLightbox();
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initScrollDirection();
|
|
});
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|
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})();
|