Developer-Toolbox/tool-32-HTML-to-Markdown-Converter.html at main · Aliriyaj007/Developer-Toolbox · GitHub

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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>Tool 32 - HTML to Markdown Converter - Developer Toolbox</title>
    <link rel="stylesheet" href="assets/core.css">
    <style>
        .split-view {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            margin-bottom: 2rem;
            margin-top: 1rem;
        }
        @media (min-width: 900px) {
            .split-view { grid-template-columns: 1fr 1fr; }
        }

        textarea {
            width: 100%;
            height: 400px;
            background: var(--bg-main);
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 1rem;
            font-family: var(--font-mono);
            font-size: 14px;
            resize: vertical;
        }

        .controls {
            display: flex;
            gap: 1rem;
            align-items: center;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: var(--radius-md);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .preset-btn {
            background: rgba(var(--primary-color-rgb), 0.1);
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
            padding: 0.4rem 0.8rem;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.9rem;
        }

        .preset-btn:hover {
            background: var(--primary-color);
            color: white;
        }

        .toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0.5rem;
        }

        .options-group {
            display: flex;
            gap: 1.5rem;
            align-items: center;
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
            width: 100%;
        }

        .options-group label {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
        }
    </style>
</head>
<body class="theme-dark">
    <div class="tool-canvas-container" id="canvas-container"></div>
    <main class="main-content">
        <div class="container">
            <div class="tool-header">
                <div>
                    <a href="index.html" class="back-link">← Back to Toolbox</a>
                    <h1>32. HTML to Markdown Converter</h1>
                </div>
                <div>
                    <select id="theme-select" aria-label="Select Theme">
                        <option value="dark">Dark Theme</option>
                        <option value="light">Light Theme</option>
                        <option value="solarized">Solarized</option>
                        <option value="neon">Neon Glow</option>
                        <option value="highcontrast">High Contrast</option>
                    </select>
                </div>
            </div>

            <div class="glass-panel">
                <div class="controls">
                    <span style="font-weight: bold; color: var(--text-secondary);">Sample Presets:</span>
                    <button class="preset-btn" onclick="loadPreset('basic')">Basic Formatting</button>
                    <button class="preset-btn" onclick="loadPreset('table')">Tables</button>
                    <button class="preset-btn" onclick="loadPreset('code')">Code Blocks</button>
                    <button class="preset-btn" onclick="loadPreset('lists')">Complex Lists</button>

                    <div class="options-group">
                        <label>
                            <input type="checkbox" id="opt-heading-style" checked> Setext Headings (h1/h2)
                        </label>
                        <label>
                            <input type="checkbox" id="opt-hr" checked> Use *** for HR
                        </label>
                        <label>
                            <input type="checkbox" id="opt-bullet" checked> Use * for lists
                        </label>
                    </div>
                </div>

                <div class="split-view">
                    <div>
                        <div class="toolbar">
                            <label style="font-weight: bold; color: var(--text-secondary);">HTML Input</label>
                            <button class="btn btn-sm" id="clear-btn">Clear</button>
                        </div>
                        <textarea id="html-input" placeholder="Paste your HTML here..."></textarea>
                    </div>

                    <div>
                        <div class="toolbar">
                            <label style="font-weight: bold; color: var(--text-secondary);">Markdown Output</label>
                            <button class="btn btn-sm btn-primary" id="copy-btn">Copy Markdown</button>
                        </div>
                        <textarea id="markdown-output" readonly placeholder="Markdown output will appear here..."></textarea>
                    </div>
                </div>
            </div>
        </div>
    </main>

    <footer class="global-footer">
        <div class="container">
            Made with ❤️ by <a href="https://github.com/Aliriyaj007" target="_blank">Aliriyaj007</a>
        </div>
    </footer>

    <script src="assets/core.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/turndown/7.1.2/turndown.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r134/three.min.js"></script>
    <script>
        const presets = {
            basic: `<h1>32. Main Title</h1>
<p>This is a paragraph with <strong>bold</strong>, <em>italic</em>, and <a href="https://example.com">links</a>.</p>
<h2>Subtitle</h2>
<p>Another paragraph.</p>
<img src="https://via.placeholder.com/150" alt="Placeholder Image">`,
            table: `<h2>Data Table</h2>
<table>
  <thead>
    <tr>
      <th>Name</th>
      <th>Age</th>
      <th>City</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>John</td>
      <td>28</td>
      <td>New York</td>
    </tr>
    <tr>
      <td>Jane</td>
      <td>34</td>
      <td>London</td>
    </tr>
  </tbody>
</table>`,
            code: `<h2>Code Example</h2>
<p>Here is some inline <code>console.log()</code> code.</p>
<pre><code class="language-javascript">function hello() {
  console.log("Hello World");
}</code></pre>`,
            lists: `<h2>Task List</h2>
<ul>
  <li>First item</li>
  <li>Second item
    <ul>
      <li>Sub item 1</li>
      <li>Sub item 2</li>
    </ul>
  </li>
  <li>Third item</li>
</ul>
<ol>
  <li>Step one</li>
  <li>Step two</li>
</ol>`
        };

        const htmlInput = document.getElementById('html-input');
        const mkOutput = document.getElementById('markdown-output');
        const clearBtn = document.getElementById('clear-btn');
        const copyBtn = document.getElementById('copy-btn');

        const optHeading = document.getElementById('opt-heading-style');
        const optHr = document.getElementById('opt-hr');
        const optBullet = document.getElementById('opt-bullet');

        let turndownService;

        const updateConfig = () => {
            turndownService = new TurndownService({
                headingStyle: optHeading.checked ? 'setext' : 'atx',
                hr: optHr.checked ? '***' : '---',
                bulletListMarker: optBullet.checked ? '*' : '-',
                codeBlockStyle: 'fenced'
            });

            // Add basic table support plugin if needed, but Turndown 7 has some built in
            // For robust tables, we add a simple custom rule
            turndownService.addRule('tableCell', {
                filter: ['th', 'td'],
                replacement: function (content, node) {
                    return ' ' + content + ' |';
                }
            });

            turndownService.addRule('tableRow', {
                filter: 'tr',
                replacement: function (content, node) {
                    let borderCells = '';
                    const alignMap = { left: ':--', right: '--:', center: ':-:' };

                    if (node.parentNode.nodeName === 'THEAD') {
                        Array.from(node.cells).forEach(cell => {
                            const align = cell.getAttribute('align');
                            let border = '---';
                            if (alignMap[align]) border = alignMap[align];
                            borderCells += ' ' + border + ' |';
                        });
                        return '\n|' + content + '\n|' + borderCells;
                    }
                    return '\n|' + content;
                }
            });

            turndownService.addRule('table', {
                filter: 'table',
                replacement: function (content) {
                    return '\n\n' + content + '\n\n';
                }
            });
            turndownService.addRule('tableSection', {
                filter: ['thead', 'tbody', 'tfoot'],
                replacement: function (content) {
                    return content;
                }
            });

            convert();
        };

        window.loadPreset = (key) => {
            htmlInput.value = presets[key];
            convert();
        };

        const convert = () => {
            const html = htmlInput.value;
            if(!html.trim()) {
                mkOutput.value = '';
                if(window.update3DDoc) window.update3DDoc(0);
                return;
            }
            try {
                const markdown = turndownService.turndown(html);
                mkOutput.value = markdown;
                if(window.update3DDoc) window.update3DDoc(markdown.length);
            } catch(e) {
                mkOutput.value = "Error converting HTML: " + e.message;
            }
        };

        [optHeading, optHr, optBullet].forEach(el => el.addEventListener('change', updateConfig));
        htmlInput.addEventListener('input', convert);

        clearBtn.addEventListener('click', () => {
            htmlInput.value = '';
            convert();
        });

        copyBtn.addEventListener('click', () => {
            if(!mkOutput.value) return;
            navigator.clipboard.writeText(mkOutput.value);
            const og = copyBtn.textContent;
            copyBtn.textContent = "Copied!";
            setTimeout(() => copyBtn.textContent = og, 1500);
        });

        document.addEventListener('DOMContentLoaded', () => {
            updateConfig();
            loadPreset('basic');
        });

        // 3D Visualization: A document folding into a book
        let scene, camera, renderer, docGroup, page1, page2;
        let isFolded = false;

        function init3D() {
            const container = document.getElementById('canvas-container');
            if(!container || !window.THREE) return;

            scene = new THREE.Scene();
            camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 100);
            camera.position.set(-5, 4, 8);
            camera.lookAt(0, 0, 0);

            renderer = new THREE.WebGLRenderer({ alpha: true, antialias: true });
            renderer.setSize(window.innerWidth, window.innerHeight);
            container.appendChild(renderer.domElement);

            const ambientLight = new THREE.AmbientLight(0xffffff, 0.7);
            scene.add(ambientLight);

            const dirLight = new THREE.DirectionalLight(0xffffff, 0.6);
            dirLight.position.set(5, 10, 5);
            scene.add(dirLight);

            docGroup = new THREE.Group();
            scene.add(docGroup);

            // Document materials
            const frontMat = new THREE.MeshPhongMaterial({ color: 0xffffff, side: THREE.FrontSide });
            const backMat = new THREE.MeshPhongMaterial({ color: 0xdddddd, side: THREE.BackSide });

            // Text lines texture/bump simulation (using basic lines)
            const textGeo = new THREE.BoxGeometry(1.6, 0.05, 0.05);
            const textMat = new THREE.MeshBasicMaterial({ color: 0x888888 });

            // Page 1 (Left/Bottom)
            page1 = new THREE.Group();
            const p1Mesh = new THREE.Mesh(new THREE.PlaneGeometry(2, 2.5), frontMat);
            const p1Back = new THREE.Mesh(new THREE.PlaneGeometry(2, 2.5), backMat);
            p1Mesh.rotation.x = -Math.PI / 2;
            p1Back.rotation.x = -Math.PI / 2;
            page1.add(p1Mesh);
            page1.add(p1Back);

            // Add text lines to page 1
            for(let i=0; i<5; i++) {
                const line = new THREE.Mesh(textGeo, textMat);
                line.position.set(0, 0.01, -0.8 + (i * 0.3));
                page1.add(line);
            }

            // Page 2 (Right/Top)
            page2 = new THREE.Group();
            const p2Mesh = new THREE.Mesh(new THREE.PlaneGeometry(2, 2.5), frontMat);
            const p2Back = new THREE.Mesh(new THREE.PlaneGeometry(2, 2.5), backMat);
            p2Mesh.rotation.x = -Math.PI / 2;
            p2Back.rotation.x = -Math.PI / 2;

            // Shift pivot to left edge
            p2Mesh.position.x = 1;
            p2Back.position.x = 1;

            page2.add(p2Mesh);
            page2.add(p2Back);

            // Add text lines to page 2
            for(let i=0; i<4; i++) {
                const line = new THREE.Mesh(textGeo, textMat);
                line.position.set(1, 0.01, -0.8 + (i * 0.4));
                page2.add(line);
            }

            // Arrange pages
            page1.position.set(-1, 0, 0);
            page2.position.set(0, 0, 0); // pivot is at x=0

            docGroup.add(page1);
            docGroup.add(page2);

            docGroup.position.set(2, 0, 0);

            window.addEventListener('resize', () => {
                camera.aspect = window.innerWidth / window.innerHeight;
                camera.updateProjectionMatrix();
                renderer.setSize(window.innerWidth, window.innerHeight);
            });

            // Toggle fold every few seconds
            setInterval(() => {
                isFolded = !isFolded;
            }, 2500);

            animate();
        }

        window.update3DDoc = (length) => {
            if(!docGroup) return;
            // The longer the text, maybe the faster it folds or we add more pages
            // For simplicity, we just keep the folding animation running as the unique feature
        };

        function animate() {
            requestAnimationFrame(animate);

            if(docGroup) {
                // Animate folding
                const targetRotZ = isFolded ? Math.PI - 0.1 : 0; // fold over page1
                page2.rotation.z += (targetRotZ - page2.rotation.z) * 0.1;

                // Subtle floating
                docGroup.position.y = Math.sin(Date.now() * 0.002) * 0.2;
                docGroup.rotation.y = Math.sin(Date.now() * 0.001) * 0.2;
            }

            renderer.render(scene, camera);
        }

        document.addEventListener('DOMContentLoaded', init3D);
    </script>
</body>
</html>