robert
/
xjs


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Animal.js Documentation</title>
    <style>
        :root {
            --sidebar-bg: #111;
            --main-bg: #111;
            --border-color: #222;
            --text-color: #888;
            --text-hover: #ccc;
            --active-color: #ff4b4b; /* Red/Orange for active item */
            --header-color: #666;
            --middle-col-bg: #161616;
            --tree-line-color: #333;
            --accent-color: #ff9f43;
        }
        
        body {
            margin: 0;
            padding: 0;
            height: 100vh;
            display: flex;
            background: var(--main-bg);
            color: var(--text-color);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            overflow: hidden;
            font-size: 14px;
        }

        /* 1. LEFT SIDEBAR - MAIN NAVIGATION */
        .sidebar-left {
            width: 260px;
            background: var(--sidebar-bg);
          
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            flex-shrink: 0;
            padding-bottom: 40px;
        }

        .logo-area {
            padding: 24px 20px;
            font-size: 18px;
            font-weight: bold;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .logo-circle {
            width: 10px;
            height: 10px;
            background: #fff;
            border-radius: 50%;
        }

        /* Tree Structure */
        .nav-tree {
            padding: 0 20px;
        }

        .tree-group {
            margin-bottom: 5px;
        }

        .tree-header {
            padding: 8px 0;
            color: var(--header-color);
            font-weight: 600;
            cursor: pointer;
            transition: color 0.2s;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .tree-header:hover {
            color: var(--text-hover);
        }
        
        .tree-header.active-header {
            color: #e69f3c; /* Highlight parent if needed, usually just children */
        }

        .tree-children {
            padding-left: 14px; /* Indent */
            border-left: 1px solid var(--tree-line-color);
            margin-left: 2px;
            display: none; /* Collapsed by default */
            flex-direction: column;
        }
        
        .tree-children.expanded {
            display: flex;
        }

        .nav-item {
            display: block;
            padding: 6px 0 6px 15px;
            color: var(--text-color);
            text-decoration: none;
            cursor: pointer;
            transition: all 0.2s;
            position: relative;
        }

        .nav-item:hover {
            color: var(--text-hover);
        }

        /* Active Item Style (Reference: Red text, maybe red border left overlaying the gray line?) */
        .nav-item.active {
            color: var(--active-color);
        }
        
        /* Optional: Active marker on the left line */
        .nav-item.active::before {
            content: '';
            position: absolute;
            left: -1px; /* Overlap the border */
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--active-color);
        }

        /* Search Box in sidebar */
        .sidebar-search {
            margin: 0 20px 20px 20px;
            background: #1a1a1a;
            border: 1px solid #333;
            border-radius: 4px;
            padding: 8px 12px;
            color: #fff;
            font-size: 13px;
            cursor: pointer;
        }
        .sidebar-search:hover {
            border-color: #555;
        }

        /* 2. MIDDLE SIDEBAR */
        .sidebar-middle {
            width: 320px;
            background: var(--middle-col-bg);
           
            display: flex;
            flex-direction: column;
            overflow: hidden;
            flex-shrink: 0;
        }
        #middle-frame {
            width: 100%;
            height: 100%;
            border: none;
            background: transparent;
        }

        /* 3. RIGHT CONTENT */
        .content-right {
            flex: 1;
            display: flex;
            flex-direction: column;
            background: #000;
            overflow: hidden;
        }
        #content-frame {
            flex: 1;
            border: none;
            width: 100%;
            height: 100%;
        }

        /* Connection line between middle and right columns */
        .column-connection-line {
            position: fixed;
            inset: 0;
            width: 100vw;
            height: 100vh;
            pointer-events: none;
            z-index: 20;
            opacity: 0.85;
        }

        .column-connection-path {
            stroke: var(--accent-color);
            stroke-width: 2;
            stroke-dasharray: 6 6;
            stroke-linecap: round;
            fill: none;
            opacity: 0.35;
            animation: dashFlow 1.1s linear infinite;
            filter: drop-shadow(0 0 2px rgba(255, 159, 67, 0.25));
        }

        @keyframes dashFlow {
            to { stroke-dashoffset: -12; }
        }

    </style>
</head>
<body>

    <!-- 1. Left Sidebar -->
    <div class="sidebar-left">
        <div class="logo-area">
            <div class="logo-circle"></div>
            Animal.js
        </div>
        
        <div class="sidebar-search" onclick="selectCategory('search.html', 'test_on_update.html', null)">
            Search
        </div>
        
        <div class="nav-tree">
            <!-- Group: Getting Started -->
            <div class="tree-group">
                <div class="tree-header" onclick="toggleTree(this)">Getting started</div>
                <div class="tree-children">
                    <div class="nav-item" onclick="selectCategory('search.html', 'test_css_selector.html', this)">Installation</div>
                    <div class="nav-item" onclick="selectCategory('search.html', 'test_css_selector.html', this)">Module imports</div>
                </div>
            </div>

            <!-- Group: Timer -->
            <div class="tree-group">
                <div class="tree-header" onclick="toggleTree(this)">Timer</div>
                <div class="tree-children">
                    <div class="nav-item">Settings</div>
                </div>
            </div>

            <!-- Group: Animation -->
            <div class="tree-group">
                <div class="tree-header active-header" onclick="toggleTree(this)">Animation</div>
                <div class="tree-children expanded">
                    <div class="nav-item active" onclick="selectCategory('targets/list.html', 'targets/overview.html', this)">Targets</div>
                    <div class="nav-item" onclick="selectCategory('animatable_properties/list.html', 'animatable_properties/test_css_props.html', this)">Animatable properties</div>
                    <div class="nav-item" onclick="selectCategory('tween_value_types/list.html', 'tween_value_types/test_numerical.html', this)">Tween value types</div>
            <div class="nav-item">Tween parameters</div>
                    <div class="nav-item">Keyframes</div>
                    <div class="nav-item">Playback settings</div>
                    
                    <!-- Callbacks Nested? Or separate? Reference shows Callbacks under Animation -->
                    <div class="nav-item" onclick="selectCategory('list_callbacks.html', 'test_on_update.html', this)">Callbacks</div>
                    
                    <!-- Examples -->
                    <div class="nav-item" onclick="selectCategory('examples/list.html', 'examples/controls.html', this)">Examples</div>
                    
                    <div class="nav-item">Methods</div>
                    <div class="nav-item">Properties</div>
                </div>
            </div>
            
            <!-- Group: Timeline -->
            <div class="tree-group">
                <div class="tree-header" onclick="toggleTree(this)">Timeline</div>
                <div class="tree-children">
                    <div class="nav-item">Basics</div>
                </div>
            </div>
            
            <!-- Group: Animatable -->
            <div class="tree-group">
                <div class="tree-header" onclick="toggleTree(this)">Animatable</div>
                <div class="tree-children">
                    <div class="nav-item">Properties</div>
                </div>
            </div>

        </div>
    </div>

    <!-- 2. Middle Sidebar -->
    <div class="sidebar-middle">
        <iframe id="middle-frame" src="targets/list.html"></iframe>
    </div>

    <!-- 3. Right Content -->
    <div class="content-right">
        <iframe id="content-frame" src="targets/test_css_selector.html"></iframe>
    </div>

    <!-- SVG overlay for the middle→right connection line -->
    <svg id="column-connection-line" class="column-connection-line" aria-hidden="true">
        <path id="column-connection-path" class="column-connection-path" d=""></path>
    </svg>

    <script>
        function toggleTree(header) {
            const children = header.nextElementSibling;
            if (children) {
                children.classList.toggle('expanded');
                
                // Optional: Highlight header when expanded?
                // header.classList.toggle('active-header');
            }
        }

        function selectCategory(listUrl, defaultContentUrl, el) {
            // 1. Highlight Nav Item
            document.querySelectorAll('.nav-item').forEach(item => item.classList.remove('active'));
            if (el) el.classList.add('active');

            // 2. Load Middle Column (List)
            const middleFrame = document.getElementById('middle-frame');
            if (middleFrame.getAttribute('src') !== listUrl) {
                middleFrame.src = listUrl;
            }

            // 3. Load Right Column (Default Content)
            loadContent(defaultContentUrl);
        }

        function loadContent(url) {
            const contentFrame = document.getElementById('content-frame');
            if (contentFrame.getAttribute('src') !== url) {
                contentFrame.src = url;
            }

            // Keep middle list selection in sync when possible
            try {
                setMiddleActive(url);
            } catch {}

            // Update connection line after navigation
            scheduleConnectionLineUpdate();
        }

        // Called by content iframe pages (and also internally after navigation)
        function setMiddleActive(contentUrl) {
            const middleFrame = document.getElementById('middle-frame');
            if (!middleFrame) return;
            const win = middleFrame.contentWindow;
            if (win && typeof win.setActiveByContentUrl === 'function') {
                win.setActiveByContentUrl(contentUrl);
            }

            // Update connection line when active item changes
            scheduleConnectionLineUpdate();
        }

        // =============================
        // Middle ↔ Right connection line
        // =============================
        const connectionSvg = document.getElementById('column-connection-line');
        const connectionPath = document.getElementById('column-connection-path');
        let _connRaf = 0;

        function scheduleConnectionLineUpdate() {
            if (_connRaf) return;
            _connRaf = requestAnimationFrame(() => {
                _connRaf = 0;
                updateConnectionLine();
            });
        }

        function getActiveElementInFrame(frameEl) {
            try {
                const doc = frameEl?.contentDocument;
                if (!doc) return null;
                // Middle list pages use .card.active / .header-card.active; fall back to .active
                return (
                    doc.querySelector('.card.active') ||
                    doc.querySelector('.header-card.active') ||
                    doc.querySelector('.nav-item.active') ||
                    doc.querySelector('.active')
                );
            } catch {
                return null;
            }
        }

        function getAnchorElementInContentFrame(frameEl) {
            try {
                const doc = frameEl?.contentDocument;
                if (!doc) return null;
                // Prefer a *visible* code area anchor (in-viewport), then fall back
                const candidates = [
                    '.box-container .box-header',
                    '.code-view.active, .html-view.active, .css-view.active',
                    '.box-container',
                    'h1',
                    '.container',
                    'body'
                ];
                for (const sel of candidates) {
                    const el = doc.querySelector(sel);
                    if (!el) continue;
                    // If it's visible in the iframe viewport, use it; else keep looking
                    const r = el.getBoundingClientRect();
                    const vh = frameEl?.clientHeight || 0;
                    if (!vh) return el;
                    const visibleTop = Math.max(0, r.top);
                    const visibleBottom = Math.min(vh, r.bottom);
                    if (visibleBottom - visibleTop > 8) return el;
                }
                return doc.body;
            } catch {
                return null;
            }
        }

        function clamp(n, min, max) {
            return Math.min(Math.max(n, min), max);
        }

        function getVisibleCenterInFrame(frameEl, elRect) {
            const w = frameEl?.clientWidth || 0;
            const h = frameEl?.clientHeight || 0;
            if (!w || !h) return null;

            const visibleLeft = Math.max(0, elRect.left);
            const visibleRight = Math.min(w, elRect.right);
            const visibleTop = Math.max(0, elRect.top);
            const visibleBottom = Math.min(h, elRect.bottom);

            if (visibleRight - visibleLeft <= 1 || visibleBottom - visibleTop <= 1) {
                return null;
            }

            return {
                x: (visibleLeft + visibleRight) / 2,
                y: (visibleTop + visibleBottom) / 2
            };
        }

        function updateConnectionLine() {
            if (!connectionSvg || !connectionPath) return;

            const middleFrame = document.getElementById('middle-frame');
            const contentFrame = document.getElementById('content-frame');
            if (!middleFrame || !contentFrame) return;

            const midRect = middleFrame.getBoundingClientRect();
            const rightRect = contentFrame.getBoundingClientRect();

            const active = getActiveElementInFrame(middleFrame);
            const anchor = getAnchorElementInContentFrame(contentFrame);
            if (!active || !anchor) {
                connectionPath.setAttribute('d', '');
                connectionSvg.style.opacity = '0';
                return;
            }

            const activeRect = active.getBoundingClientRect();
            const anchorRect = anchor.getBoundingClientRect();

            // Use the *visible* part of the element within its iframe viewport
            const activeCenter = getVisibleCenterInFrame(middleFrame, activeRect);
            const anchorCenter = getVisibleCenterInFrame(contentFrame, anchorRect);
            if (!activeCenter || !anchorCenter) {
                // If either side isn't visible in its iframe, hide the line (prevents weird drifting)
                connectionPath.setAttribute('d', '');
                connectionSvg.style.opacity = '0';
                return;
            }

            // Convert iframe-viewport coordinates to parent viewport coordinates
            const startX = midRect.left + clamp(activeRect.right, 0, middleFrame.clientWidth);
            const startY = midRect.top + activeCenter.y;

            // Point into the code area a bit (not exactly at left edge)
            const endX = rightRect.left + clamp(anchorRect.left + 18, 12, contentFrame.clientWidth - 12);
            const endY = rightRect.top + anchorCenter.y;

            // Draw an L-shaped polyline.
            // Keep the vertical segment aligned with the column divider (middle ↔ right).
            const dividerX = rightRect.left + 0.5; // half-pixel for crisper stroke alignment
            const x1 = Math.max(startX + 12, dividerX);
            const d = [
                `M ${startX} ${startY}`,
                `L ${x1} ${startY}`,
                `L ${x1} ${endY}`,
                `L ${endX} ${endY}`
            ].join(' ');

            connectionPath.setAttribute('d', d);
            connectionSvg.style.opacity = '0.85';
        }

        function attachFrameScrollListeners(frameEl) {
            if (!frameEl) return;
            const onScroll = () => {
                markFrameScrolling(frameEl);
                scheduleConnectionLineUpdate();
            };
            try {
                // Window scroll inside iframe
                frameEl.contentWindow?.addEventListener('scroll', onScroll, { passive: true });
                // Some pages scroll on document/body; capture to be safe
                frameEl.contentDocument?.addEventListener('scroll', onScroll, true);
                frameEl.contentDocument?.documentElement?.addEventListener?.('scroll', onScroll, { passive: true });
                frameEl.contentDocument?.body?.addEventListener?.('scroll', onScroll, { passive: true });
            } catch {}
        }

        const _scrollHideTimers = new WeakMap();
        function markFrameScrolling(frameEl) {
            try {
                const doc = frameEl?.contentDocument;
                if (!doc) return;
                doc.documentElement?.classList.add('scrolling');
                doc.body?.classList.add('scrolling');
                const prev = _scrollHideTimers.get(frameEl);
                if (prev) clearTimeout(prev);
                _scrollHideTimers.set(frameEl, setTimeout(() => {
                    try {
                        doc.documentElement?.classList.remove('scrolling');
                        doc.body?.classList.remove('scrolling');
                    } catch {}
                }, 500));
            } catch {}
        }

        // Always-on lightweight loop to keep the line aligned even
        // if iframe scroll events were missed due to timing.
        let _connLoopStarted = false;
        function startConnectionLineLoop() {
            if (_connLoopStarted) return;
            _connLoopStarted = true;
            const loop = () => {
                // Only bother when we have a path (avoids work when hidden)
                if (connectionPath?.getAttribute('d')) {
                    scheduleConnectionLineUpdate();
                }
                requestAnimationFrame(loop);
            };
            requestAnimationFrame(loop);
        }

        // Make initial active state robust against iframe load ordering
        window.addEventListener('load', () => {
            const contentFrame = document.getElementById('content-frame');
            const src = contentFrame?.getAttribute('src');
            if (src) setMiddleActive(src);

            const middleFrame = document.getElementById('middle-frame');
            if (middleFrame) {
                middleFrame.addEventListener('load', () => {
                    const current = document.getElementById('content-frame')?.getAttribute('src');
                    if (current) setMiddleActive(current);
                    attachFrameScrollListeners(middleFrame);
                    scheduleConnectionLineUpdate();
                });
            }

            if (contentFrame) {
                contentFrame.addEventListener('load', () => {
                    const current = contentFrame.getAttribute('src');
                    if (current) setMiddleActive(current);
                    attachFrameScrollListeners(contentFrame);
                    scheduleConnectionLineUpdate();
                });
            }

            // If the iframes were already loaded before we attached 'load' listeners,
            // still attach scroll listeners immediately.
            attachFrameScrollListeners(middleFrame);
            attachFrameScrollListeners(contentFrame);

            window.addEventListener('resize', scheduleConnectionLineUpdate, { passive: true });
            scheduleConnectionLineUpdate();
            startConnectionLineLoop();
        });
    </script>
</body>
</html>