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{% extends "base.html" %}
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{% block title %}Camera to LaTeX | TexLab{% endblock %}
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{% block extra_css %}
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<style>
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.feature-card {
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display: inline-block;
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width: 100%;
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height: auto !important;
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padding: 20px 25px;
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margin-bottom: 20px;
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background: #fff;
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border-radius: 12px;
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box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
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}
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.camera-container {
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position: relative;
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width: 100%;
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max-width: 600px;
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margin: 0 auto 20px;
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border-radius: 15px;
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overflow: hidden;
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box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
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}
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.camera-preview {
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width: 100%;
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display: block;
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background: #000;
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}
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.capture-btn {
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position: absolute;
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bottom: 20px;
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left: 50%;
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transform: translateX(-50%);
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width: 70px;
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height: 70px;
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border-radius: 50%;
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background: rgba(255, 255, 255, 0.2);
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border: 3px solid white;
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cursor: pointer;
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transition: all 0.2s ease;
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}
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.capture-btn:hover {
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background: rgba(255, 255, 255, 0.3);
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transform: translateX(-50%) scale(1.1);
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}
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.capture-btn:active {
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transform: translateX(-50%) scale(0.95);
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}
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.capture-btn-inner {
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width: 100%;
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height: 100%;
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border-radius: 50%;
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background: white;
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}
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.image-preview {
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max-width: 100%;
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max-height: 400px;
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margin: 20px auto;
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display: block;
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border-radius: 10px;
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box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
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}
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.latex-output {
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background: #f8f9fa;
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border-radius: 10px;
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padding: 20px;
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border: 1px solid #eee;
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font-family: 'Consolas', 'Courier New', monospace;
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font-size: 1.1rem;
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white-space: pre-wrap;
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word-break: break-all;
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min-height: 100px;
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margin: 20px 0;
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}
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.rendered-output {
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background: white;
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border-radius: 10px;
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padding: 20px;
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border: 1px solid #eee;
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min-height: 100px;
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margin: 20px 0;
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text-align: center;
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}
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.solution-output {
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background: #e8f5e9;
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border-radius: 10px;
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padding: 20px;
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border: 1px solid #c8e6c9;
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margin: 20px 0;
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display: none;
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}
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.solution-title {
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color: #2e7d32;
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margin-bottom: 15px;
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font-weight: 600;
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}
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.solution-content {
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font-family: 'Consolas', 'Courier New', monospace;
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font-size: 1.1rem;
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white-space: pre-wrap;
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}
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.loading {
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display: none;
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text-align: center;
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padding: 20px;
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}
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.spinner {
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border: 4px solid rgba(0, 0, 0, 0.1);
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border-radius: 50%;
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border-top: 4px solid #667eea;
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width: 40px;
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height: 40px;
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animation: spin 1s linear infinite;
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margin: 0 auto 15px;
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}
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@keyframes spin {
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0% { transform: rotate(0deg); }
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100% { transform: rotate(360deg); }
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}
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.button-row {
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display: flex;
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gap: 15px;
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justify-content: center;
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margin: 20px 0;
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flex-wrap: wrap;
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}
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.permission-error {
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text-align: center;
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padding: 30px;
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color: #666;
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}
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.permission-error i {
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font-size: 3rem;
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color: #dc3545;
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margin-bottom: 20px;
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}
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@media (max-width: 768px) {
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.button-row {
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flex-direction: column;
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align-items: center;
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}
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.button-row .btn {
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width: 100%;
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max-width: 300px;
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}
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}
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</style>
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{% endblock %}
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{% block content %}
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<div class="page-header">
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<h1 class="page-title"><i class="fas fa-camera me-2"></i>Camera to LaTeX</h1>
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<p class="page-subtitle">
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Capture mathematical equations with your camera and convert them to clean, editable LaTeX code.
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</p>
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</div>
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<div class="row">
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<div class="col-lg-10 mx-auto">
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<div class="feature-card">
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<h3 class="section-title">Capture Equation</h3>
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<div class="camera-container">
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<video id="cameraPreview" class="camera-preview" autoplay playsinline></video>
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<div class="capture-btn" id="captureBtn">
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<div class="capture-btn-inner"></div>
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</div>
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</div>
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<div class="permission-error" id="permissionError" style="display: none;">
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<i class="fas fa-exclamation-triangle"></i>
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<h4>Camera Permission Required</h4>
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<p>Please allow camera access to use this feature.</p>
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<button id="retryPermission" class="btn btn-primary-gradient mt-3">
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<i class="fas fa-redo me-2"></i>Retry Camera Access
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</button>
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</div>
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</div>
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<div class="loading" id="loading">
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<div class="spinner"></div>
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<p>Processing your equation... This may take a few seconds.</p>
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</div>
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<div class="feature-card" id="resultCard" style="display: none;">
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<h3 class="section-title">Generated LaTeX</h3>
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<div class="image-preview-container" id="imagePreviewContainer" style="display: none;">
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<h5>Captured Image:</h5>
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<img id="imagePreview" class="image-preview" alt="Captured equation">
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</div>
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<div class="rendered-output">
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<h5>Rendered Equation:</h5>
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<div id="renderedContent"></div>
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</div>
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<div class="latex-output" id="latexOutput"></div>
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<div class="solution-output" id="solutionOutput">
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<h5 class="solution-title"><i class="fas fa-calculator me-2"></i>Solution</h5>
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<div class="solution-content" id="solutionContent"></div>
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</div>
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<div class="button-row">
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<button id="solveBtn" class="btn btn-accent-gradient">
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<i class="fas fa-calculator me-2"></i>Solve Equation
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</button>
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<button id="copyBtn" class="btn btn-secondary-gradient">
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<i class="fas fa-copy me-2"></i>Copy LaTeX
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</button>
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<button id="newCapture" class="btn btn-neutral">
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<i class="fas fa-camera me-2"></i>New Capture
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</button>
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<a href="/" class="btn btn-neutral">
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<i class="fas fa-home me-2"></i>Back to Home
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</a>
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</div>
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</div>
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</div>
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</div>
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{% endblock %}
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{% block extra_js %}
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<script>
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const cameraPreview = document.getElementById('cameraPreview');
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const captureBtn = document.getElementById('captureBtn');
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const permissionError = document.getElementById('permissionError');
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const retryPermission = document.getElementById('retryPermission');
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const resultCard = document.getElementById('resultCard');
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const loading = document.getElementById('loading');
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const imagePreview = document.getElementById('imagePreview');
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const imagePreviewContainer = document.getElementById('imagePreviewContainer');
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const solveBtn = document.getElementById('solveBtn');
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const solutionOutput = document.getElementById('solutionOutput');
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let currentStream = null;
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let currentLatex = '';
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async function initCamera() {
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try {
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const stream = await navigator.mediaDevices.getUserMedia({
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video: {
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facingMode: 'environment',
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width: { ideal: 1280 },
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height: { ideal: 720 }
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}
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});
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currentStream = stream;
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cameraPreview.srcObject = stream;
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permissionError.style.display = 'none';
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} catch (err) {
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console.error('Camera error:', err);
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permissionError.style.display = 'block';
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cameraPreview.style.display = 'none';
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}
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}
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retryPermission.addEventListener('click', initCamera);
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captureBtn.addEventListener('click', async () => {
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if (!currentStream) return;
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try {
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loading.style.display = 'block';
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resultCard.style.display = 'none';
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solutionOutput.style.display = 'none';
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const canvas = document.createElement('canvas');
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const video = cameraPreview;
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canvas.width = video.videoWidth;
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canvas.height = video.videoHeight;
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const ctx = canvas.getContext('2d');
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ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
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canvas.toBlob(async (blob) => {
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const formData = new FormData();
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formData.append('image', blob, 'capture.jpg');
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try {
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const response = await fetch('/camera/process', {
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method: 'POST',
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body: formData
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});
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const data = await response.json();
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if (data.success) {
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currentLatex = data.latex;
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imagePreview.src = canvas.toDataURL('image/jpeg');
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imagePreviewContainer.style.display = 'block';
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document.getElementById('latexOutput').textContent = data.latex;
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document.getElementById('renderedContent').innerHTML = `$$${data.latex}$$`;
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if (typeof MathJax !== 'undefined') {
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MathJax.typesetPromise([document.getElementById('renderedContent')]);
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}
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resultCard.style.display = 'block';
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} else {
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alert('Error: ' + data.error);
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}
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} catch (error) {
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console.error('Processing error:', error);
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alert('An error occurred during processing. Please try again.');
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} finally {
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loading.style.display = 'none';
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}
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}, 'image/jpeg', 0.9);
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} catch (error) {
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console.error('Capture error:', error);
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alert('An error occurred during capture. Please try again.');
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loading.style.display = 'none';
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}
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});
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solveBtn.addEventListener('click', async () => {
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if (!currentLatex) return;
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try {
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loading.style.display = 'block';
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const response = await fetch('/camera/solve', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json'
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},
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body: JSON.stringify({ latex: currentLatex })
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});
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const data = await response.json();
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if (data.success) {
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const solution = data.solution;
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let solutionText = '';
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if (solution.type === 'equation') {
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solutionText = `Solutions:\n${solution.solutions.join('\n')}`;
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} else if (solution.type === 'expression') {
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solutionText = `Simplified:\n${solution.result}`;
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} else if (solution.type === 'numerical') {
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solutionText = `Numerical value:\n${solution.result}`;
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} else if (solution.type === 'system') {
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solutionText = `System solutions:\n${JSON.stringify(solution.solutions)}`;
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} else if (solution.type === 'error') {
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solutionText = `Error: ${solution.message}`;
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}
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document.getElementById('solutionContent').textContent = solutionText;
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solutionOutput.style.display = 'block';
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} else {
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alert('Error: ' + data.error);
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}
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} catch (error) {
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console.error('Solving error:', error);
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alert('An error occurred while solving the equation. Please try again.');
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} finally {
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loading.style.display = 'none';
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}
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});
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document.getElementById('copyBtn').addEventListener('click', () => {
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const latexText = document.getElementById('latexOutput').textContent;
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navigator.clipboard.writeText(latexText).then(() => {
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showNotification('LaTeX code copied to clipboard!');
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}).catch(err => {
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console.error('Failed to copy: ', err);
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alert('Failed to copy LaTeX code. Please try again.');
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});
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});
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document.getElementById('newCapture').addEventListener('click', () => {
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resultCard.style.display = 'none';
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solutionOutput.style.display = 'none';
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});
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window.addEventListener('load', initCamera);
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window.addEventListener('beforeunload', () => {
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if (currentStream) {
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currentStream.getTracks().forEach(track => track.stop());
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}
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});
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</script>
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{% endblock %} |