Add enlargable/zoomable mermaid lightbox for KQVI diagram
- Add mermaid-lightbox.js with click-to-expand modal functionality - Hover shows 'View Full Size' button on mermaid diagrams - Modal displays full diagram with dark overlay backdrop - Escape key or click outside closes modal - CSS fades in expand button on hover for discoverability - Works with mdbook's mermaid preprocessor
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@@ -7,7 +7,7 @@ description = "A taxonomy of puzzle design patterns from classic point-and-click
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[output.html]
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git-repository-url = "https://github.com/noti/puzzle-design-kb"
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edit-url-template = "https://github.com/noti/puzzle-design-kb/edit/main/{path}"
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additional-js = ["mermaid.min.js", "mermaid-init.js"]
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additional-js = ["mermaid.min.js", "mermaid-init.js", "mermaid-lightbox.js"]
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[output.html.playground]
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editable = true
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196
mermaid-lightbox.js
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196
mermaid-lightbox.js
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@@ -0,0 +1,196 @@
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// Mermaid Lightbox - Click to expand diagrams in full-size modal
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(() => {
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const lightboxHTML = `
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<div id="mermaid-lightbox" class="mermaid-lightbox" aria-hidden="true">
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<div class="mermaid-lightbox-content">
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<button class="mermaid-lightbox-close" aria-label="Close">×</button>
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<div class="mermaid-lightbox-diagram"></div>
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</div>
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</div>
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`;
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const styleHTML = `
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<style>
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.mermaid-container {
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position: relative;
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margin: 1.5em 0;
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}
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.mermaid-expand-btn {
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position: absolute;
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top: 8px;
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right: 8px;
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z-index: 10;
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background: rgba(0, 0, 0, 0.6);
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color: white;
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border: none;
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border-radius: 4px;
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padding: 6px 12px;
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font-size: 12px;
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cursor: pointer;
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opacity: 0;
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transition: opacity 0.2s ease;
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}
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.mermaid-container:hover .mermaid-expand-btn {
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opacity: 1;
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}
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.mermaid-expand-btn:hover {
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background: rgba(0, 0, 0, 0.8);
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}
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.mermaid-lightbox {
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display: none;
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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: rgba(0, 0, 0, 0.9);
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z-index: 9999;
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justify-content: center;
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align-items: center;
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padding: 20px;
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box-sizing: border-box;
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}
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.mermaid-lightbox.active {
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display: flex;
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}
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.mermaid-lightbox-content {
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position: relative;
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max-width: 95vw;
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max-height: 95vh;
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overflow: auto;
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background: white;
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border-radius: 8px;
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}
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.mermaid-lightbox-close {
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position: absolute;
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top: 10px;
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right: 10px;
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z-index: 10001;
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background: rgba(0, 0, 0, 0.7);
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color: white;
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border: none;
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border-radius: 50%;
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width: 36px;
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height: 36px;
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font-size: 24px;
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cursor: pointer;
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line-height: 1;
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}
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.mermaid-lightbox-close:hover {
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background: rgba(0, 0, 0, 0.9);
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}
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.mermaid-lightbox-diagram {
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padding: 20px;
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}
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.mermaid-lightbox-diagram svg {
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max-width: 100%;
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height: auto;
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}
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.mermaid-lightbox-diagram .mermaid {
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background: white;
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}
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</style>
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`;
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// Inject styles
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document.head.insertAdjacentHTML('beforeend', styleHTML);
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// Inject lightbox HTML
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document.body.insertAdjacentHTML('beforeend', lightboxHTML);
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const lightbox = document.getElementById('mermaid-lightbox');
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const lightboxDiagram = lightbox.querySelector('.mermaid-lightbox-diagram');
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const closeBtn = lightbox.querySelector('.mermaid-lightbox-close');
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// Wait for mermaid to initialize, then wrap each mermaid diagram
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function initLightbox() {
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const mermaidPres = document.querySelectorAll('pre.mermaid');
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mermaidPres.forEach((pre) => {
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// Only add container and button if not already wrapped
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if (pre.parentElement.classList.contains('mermaid-container')) return;
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// Wrap pre in container
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const container = document.createElement('div');
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container.className = 'mermaid-container';
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pre.parentNode.insertBefore(container, pre);
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container.appendChild(pre);
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// Add expand button
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const btn = document.createElement('button');
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btn.className = 'mermaid-expand-btn';
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btn.textContent = 'View Full Size';
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btn.setAttribute('aria-label', 'Expand diagram to full size');
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container.appendChild(btn);
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// Click handler for expanding
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btn.addEventListener('click', (e) => {
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e.stopPropagation();
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openLightbox(pre);
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});
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// Also make the pre element clickable
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pre.style.cursor = 'pointer';
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pre.addEventListener('click', (e) => {
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e.stopPropagation();
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openLightbox(pre);
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});
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});
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}
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function openLightbox(pre) {
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// Clone the mermaid content for the lightbox
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lightboxDiagram.innerHTML = '';
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const clone = pre.cloneNode(true);
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clone.className = 'mermaid';
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lightboxDiagram.appendChild(clone);
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lightbox.setAttribute('aria-hidden', 'false');
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document.body.style.overflow = 'hidden';
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// Re-render mermaid in lightbox if needed
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if (typeof mermaid !== 'undefined') {
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mermaid.init({ node: clone.parentElement }, clone);
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}
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}
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function closeLightbox() {
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lightbox.setAttribute('aria-hidden', 'true');
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document.body.style.overflow = '';
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lightboxDiagram.innerHTML = '';
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}
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// Event listeners
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closeBtn.addEventListener('click', closeLightbox);
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lightbox.addEventListener('click', (e) => {
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if (e.target === lightbox) {
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closeLightbox();
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}
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});
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document.addEventListener('keydown', (e) => {
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if (e.key === 'Escape' && lightbox.classList.contains('active')) {
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closeLightbox();
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}
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});
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// Initialize after DOM is ready
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', initLightbox);
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} else {
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// Small delay to ensure mermaid.init() has run
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setTimeout(initLightbox, 100);
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}
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})();
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