Meekdai
GitHub
commit
1efcf279d5
369
plugins/lightbox.js
Normal file
369
plugins/lightbox.js
Normal file
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(function() {
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// 灯箱插件
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class Lightbox {
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constructor(options = {}) {
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this.options = Object.assign({
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animationDuration: 300,
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closeOnOverlayClick: true,
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onOpen: null,
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onClose: null,
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onNavigate: null
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}, options);
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this.images = [];
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this.currentIndex = 0;
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this.isOpen = false;
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this.isZoomed = false;
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this.zoomLevel = 1;
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this.touchStartX = 0;
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this.touchEndX = 0;
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this.wheelTimer = null;
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this.init();
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}
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init() {
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this.createStyles();
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this.createLightbox();
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this.bindEvents();
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}
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createStyles() {
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const style = document.createElement('style');
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style.textContent = `
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.lb-lightbox-overlay {
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position: fixed;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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background-color: rgba(255, 255, 255, 0.9);
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backdrop-filter: blur(5px);
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display: flex;
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justify-content: center;
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align-items: center;
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opacity: 0;
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transition: opacity ${this.options.animationDuration}ms ease;
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pointer-events: none;
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}
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.lb-lightbox-overlay.active {
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pointer-events: auto;
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}
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.lb-lightbox-content-wrapper {
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position: relative;
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display: flex;
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justify-content: center;
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align-items: center;
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width: 100%;
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height: 100%;
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}
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.lb-lightbox-container {
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max-width: 90%;
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max-height: 90%;
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position: relative;
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transition: transform ${this.options.animationDuration}ms cubic-bezier(0.25, 0.1, 0.25, 1);
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}
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.lb-lightbox-image {
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max-width: 100%;
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max-height: 100%;
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object-fit: contain;
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border-radius: 8px;
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box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
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transition: transform ${this.options.animationDuration}ms cubic-bezier(0.25, 0.1, 0.25, 1), opacity ${this.options.animationDuration}ms ease;
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}
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.lb-lightbox-nav {
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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background-color: rgba(255, 255, 255, 0.8);
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color: #333;
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border: none;
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border-radius: 50%;
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width: 50px;
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height: 50px;
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font-size: 24px;
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display: flex;
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justify-content: center;
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align-items: center;
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cursor: pointer;
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transition: all 0.3s ease;
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box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
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}
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.lb-lightbox-nav:hover {
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background-color: rgba(255, 255, 255, 1);
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transform: translateY(-50%) scale(1.1);
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}
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.lb-lightbox-nav:active {
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transform: translateY(-50%) scale(0.9);
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}
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.lb-lightbox-prev {
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left: 20px;
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}
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.lb-lightbox-next {
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right: 20px;
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}
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.lb-lightbox-close {
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position: absolute;
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top: 20px;
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right: 20px;
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background-color: rgba(255, 255, 255, 0.8);
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color: #333;
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border: none;
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border-radius: 50%;
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width: 40px;
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height: 40px;
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font-size: 24px;
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display: flex;
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justify-content: center;
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align-items: center;
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cursor: pointer;
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transition: all 0.3s ease;
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box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
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}
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.lb-lightbox-close:hover {
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background-color: rgba(255, 255, 255, 1);
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transform: scale(1.1);
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}
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.lb-lightbox-close:active {
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transform: scale(0.9);
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}
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@media (max-width: 768px) {
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.lb-lightbox-nav {
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width: 40px;
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height: 40px;
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font-size: 20px;
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}
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.lb-lightbox-close {
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width: 35px;
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height: 35px;
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font-size: 20px;
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}
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}
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@media (prefers-color-scheme: dark) {
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.lb-lightbox-overlay {
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background-color: rgba(0, 0, 0, 0.9);
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}
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.lb-lightbox-nav,
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.lb-lightbox-close {
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background-color: rgba(50, 50, 50, 0.8);
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color: #fff;
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}
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.lb-lightbox-nav:hover,
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.lb-lightbox-close:hover {
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background-color: rgba(70, 70, 70, 1);
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}
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.lb-lightbox-image {
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box-shadow: 0 10px 30px rgba(255, 255, 255, 0.1);
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}
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}
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`;
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document.head.appendChild(style);
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}
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createLightbox() {
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this.overlay = document.createElement('div');
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this.overlay.className = 'lb-lightbox-overlay';
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this.overlay.style.zIndex = '-1';
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this.contentWrapper = document.createElement('div');
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this.contentWrapper.className = 'lb-lightbox-content-wrapper';
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this.container = document.createElement('div');
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this.container.className = 'lb-lightbox-container';
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this.image = document.createElement('img');
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this.image.className = 'lb-lightbox-image';
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this.prevButton = document.createElement('button');
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this.prevButton.className = 'lb-lightbox-nav lb-lightbox-prev';
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this.prevButton.innerHTML = '❮';
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this.nextButton = document.createElement('button');
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this.nextButton.className = 'lb-lightbox-nav lb-lightbox-next';
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this.nextButton.innerHTML = '❯';
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this.closeButton = document.createElement('button');
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this.closeButton.className = 'lb-lightbox-close';
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this.closeButton.innerHTML = '×';
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this.container.appendChild(this.image);
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this.contentWrapper.appendChild(this.container);
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this.contentWrapper.appendChild(this.prevButton);
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this.contentWrapper.appendChild(this.nextButton);
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this.contentWrapper.appendChild(this.closeButton);
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this.overlay.appendChild(this.contentWrapper);
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document.body.appendChild(this.overlay);
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}
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bindEvents() {
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document.addEventListener('click', this.handleImageClick.bind(this), true);
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this.overlay.addEventListener('click', this.handleOverlayClick.bind(this));
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this.prevButton.addEventListener('click', this.showPreviousImage.bind(this));
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this.nextButton.addEventListener('click', this.showNextImage.bind(this));
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this.closeButton.addEventListener('click', this.close.bind(this));
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document.addEventListener('keydown', this.handleKeyDown.bind(this));
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this.overlay.addEventListener('wheel', this.handleWheel.bind(this));
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this.overlay.addEventListener('touchstart', this.handleTouchStart.bind(this));
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this.overlay.addEventListener('touchmove', this.handleTouchMove.bind(this));
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this.overlay.addEventListener('touchend', this.handleTouchEnd.bind(this));
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}
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handleImageClick(event) {
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const clickedImage = event.target.closest('img');
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if (clickedImage && !this.isOpen) {
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event.preventDefault();
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event.stopPropagation();
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this.images = Array.from(document.querySelectorAll('.markdown-body img'));
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this.currentIndex = this.images.indexOf(clickedImage);
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this.open();
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}
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}
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handleOverlayClick(event) {
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if (event.target === this.overlay && this.options.closeOnOverlayClick) {
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this.close();
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} else if (!event.target.closest('.lb-lightbox-container')) {
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const elementBelow = document.elementFromPoint(event.clientX, event.clientY);
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if (elementBelow) {
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elementBelow.click();
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}
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}
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}
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handleKeyDown(event) {
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if (!this.isOpen) return;
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switch (event.key) {
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case 'ArrowLeft':
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this.showPreviousImage();
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break;
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case 'ArrowRight':
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this.showNextImage();
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break;
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case 'Escape':
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this.close();
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break;
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}
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}
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handleWheel(event) {
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event.preventDefault();
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clearTimeout(this.wheelTimer);
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this.wheelTimer = setTimeout(() => {
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const delta = Math.sign(event.deltaY);
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if (delta > 0) {
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this.showNextImage();
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} else {
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this.showPreviousImage();
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}
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}, 50);
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}
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handleTouchStart(event) {
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this.touchStartX = event.touches[0].clientX;
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}
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handleTouchMove(event) {
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this.touchEndX = event.touches[0].clientX;
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}
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handleTouchEnd() {
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const difference = this.touchStartX - this.touchEndX;
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if (Math.abs(difference) > 50) {
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if (difference > 0) {
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this.showNextImage();
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} else {
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this.showPreviousImage();
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}
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}
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}
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open() {
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this.isOpen = true;
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this.overlay.style.zIndex = '10000';
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this.overlay.classList.add('active');
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this.showImage();
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this.overlay.style.opacity = '1';
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document.body.style.overflow = 'hidden';
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if (typeof this.options.onOpen === 'function') {
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this.options.onOpen();
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}
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}
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close() {
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this.isOpen = false;
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this.overlay.style.opacity = '0';
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this.overlay.classList.remove('active');
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document.body.style.overflow = '';
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setTimeout(() => {
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this.image.style.transform = '';
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this.zoomLevel = 1;
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this.isZoomed = false;
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this.overlay.style.zIndex = '-1';
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}, this.options.animationDuration);
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if (typeof this.options.onClose === 'function') {
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this.options.onClose();
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}
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}
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showPreviousImage() {
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if (this.currentIndex > 0) {
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this.currentIndex--;
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this.showImage();
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}
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}
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showNextImage() {
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if (this.currentIndex < this.images.length - 1) {
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this.currentIndex++;
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this.showImage();
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}
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}
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showImage() {
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const imgSrc = this.images[this.currentIndex].src;
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this.image.style.opacity = '0';
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const newImage = new Image();
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newImage.src = imgSrc;
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newImage.onload = () => {
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this.image.src = imgSrc;
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this.image.style.opacity = '1';
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};
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this.prevButton.style.display = this.currentIndex > 0 ? '' : 'none';
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this.nextButton.style.display = this.currentIndex < this.images.length - 1 ? '' : 'none';
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if (typeof this.options.onNavigate === 'function') {
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this.options.onNavigate(this.currentIndex);
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}
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this.preloadImages();
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}
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zoom(factor) {
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this.zoomLevel += factor;
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this.zoomLevel = Math.max(1, Math.min(this.zoomLevel, 3));
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this.image.style.transform = `scale(${this.zoomLevel})`;
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this.isZoomed = this.zoomLevel !== 1;
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}
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preloadImages() {
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const preloadNext = (this.currentIndex + 1) % this.images.length;
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const preloadPrev = (this.currentIndex - 1 + this.images.length) % this.images.length;
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new Image().src = this.images[preloadNext].src;
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new Image().src = this.images[preloadPrev].src;
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}
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}
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// 将 Lightbox 类添加到全局对象
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window.Lightbox = Lightbox;
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// 自动初始化
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document.addEventListener('DOMContentLoaded', () => {
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new Lightbox();
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});
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})();
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