539 lines
21 KiB
PHP
539 lines
21 KiB
PHP
<?php
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declare(strict_types=1);
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require_once __DIR__ . '/includes/layout.php';
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library_bootstrap();
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$documentId = isset($_GET['id']) ? (int) $_GET['id'] : 0;
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// Context handling (admin/public)
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$context = ($_GET['context'] ?? '') === 'admin' ? 'admin' : 'public';
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$publicOnly = $context !== 'admin';
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$document = $documentId > 0 ? library_fetch_document($documentId, $publicOnly) : null;
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if (!$document || empty($document['file_path'])) {
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http_response_code(404);
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die('Document not found or no file attached.');
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}
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$fileUrl = library_file_url((string) $document['file_path']);
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title><?= h($document['title_en'] ?: 'Document Viewer') ?> - Reader</title>
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<!-- Icons -->
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.1/font/bootstrap-icons.css">
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<!-- Bootstrap -->
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
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<style>
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body {
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margin: 0;
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padding: 0;
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background-color: #2d3035;
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height: 100vh;
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width: 100vw;
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overflow: hidden;
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display: flex;
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flex-direction: column;
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color: #fff;
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}
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#viewer-container {
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flex: 1;
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display: flex;
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align-items: center;
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justify-content: center;
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position: relative;
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overflow: hidden;
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padding: 20px;
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}
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#flipbook-loader {
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text-align: center;
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}
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#flipbook {
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display: none;
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}
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.page {
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background-color: #fff;
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box-shadow: inset -1px 0 2px rgba(0,0,0,0.1); /* subtle spine shadow */
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}
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#toolbar {
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height: 60px;
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background-color: #1a1d21;
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display: flex;
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align-items: center;
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justify-content: space-between;
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padding: 0 20px;
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box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
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z-index: 1000;
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gap: 1rem;
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}
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.toolbar-group {
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display: flex;
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align-items: center;
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gap: 10px;
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}
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.toolbar-btn {
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background: none;
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border: none;
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color: #adb5bd;
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font-size: 1.2rem;
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cursor: pointer;
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padding: 5px 10px;
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border-radius: 4px;
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transition: color 0.2s, background-color 0.2s;
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}
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.toolbar-btn:hover {
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color: #fff;
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background-color: rgba(255,255,255,0.1);
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}
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.page-indicator {
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font-family: monospace;
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font-size: 1.1rem;
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color: #fff;
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white-space: nowrap;
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}
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.doc-title {
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font-weight: 500;
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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max-width: 200px;
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}
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/* Search Styles */
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.search-container {
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position: relative;
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display: flex;
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align-items: center;
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background: #2d3035;
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border-radius: 4px;
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padding: 2px;
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border: 1px solid #495057;
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}
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#searchInput {
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background: transparent;
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border: none;
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color: #fff;
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padding: 5px 10px;
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outline: none;
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width: 150px;
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font-size: 0.9rem;
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}
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#searchInput::placeholder {
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color: #adb5bd;
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}
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.search-controls {
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display: flex;
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border-left: 1px solid #495057;
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}
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.search-btn {
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background: none;
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border: none;
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color: #adb5bd;
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padding: 5px 8px;
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cursor: pointer;
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font-size: 0.8rem;
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}
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.search-btn:hover {
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color: #fff;
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background-color: rgba(255,255,255,0.1);
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}
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#search-status {
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font-size: 0.8rem;
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color: #adb5bd;
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margin-left: 8px;
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white-space: nowrap;
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}
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</style>
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</head>
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<body>
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<div id="toolbar">
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<div class="toolbar-group">
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<a href="/document.php?id=<?= $documentId ?><?= $context === 'admin' ? '&context=admin' : '' ?>" class="toolbar-btn" title="Back to Details">
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<i class="bi bi-arrow-left"></i>
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</a>
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<div class="doc-title d-none d-lg-block"><?= h($document['title_en'] ?: 'Document') ?></div>
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</div>
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<!-- Center: Search -->
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<div class="toolbar-group d-none d-md-flex">
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<div class="search-container">
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<input type="text" id="searchInput" placeholder="Search..." autocomplete="off">
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<div class="search-controls">
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<button id="btn-search-prev" class="search-btn" title="Previous Match"><i class="bi bi-chevron-up"></i></button>
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<button id="btn-search-next" class="search-btn" title="Next Match"><i class="bi bi-chevron-down"></i></button>
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</div>
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</div>
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<span id="search-status"></span>
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</div>
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<div class="toolbar-group">
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<button id="btn-prev" class="toolbar-btn" title="Previous Page">
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<i class="bi bi-caret-left-fill"></i>
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</button>
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<div class="page-indicator">
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<span id="page-current">1</span> <span class="text-secondary">/</span> <span id="page-total">--</span>
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</div>
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<button id="btn-next" class="toolbar-btn" title="Next Page">
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<i class="bi bi-caret-right-fill"></i>
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</button>
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</div>
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<div class="toolbar-group">
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<a href="<?= h($fileUrl) ?>" download class="toolbar-btn" title="Download PDF">
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<i class="bi bi-download"></i>
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</a>
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</div>
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</div>
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<div id="viewer-container">
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<div id="flipbook-loader">
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<div class="spinner-border text-light mb-3" role="status"></div>
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<div>Loading Document...</div>
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<div id="loader-status" class="text-secondary small mt-2"></div>
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</div>
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<div id="flipbook"></div>
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</div>
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<!-- Scripts -->
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<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
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<script src="https://unpkg.com/page-flip/dist/js/page-flip.browser.js"></script>
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<script>
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// Global State
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let pdfDoc = null;
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let pageFlip = null;
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let searchResults = []; // Array of { pageIndex, rects: [x,y,w,h] }
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let currentMatchIndex = -1;
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let pageHighlighters = {}; // Map of pageIndex -> CanvasContext (for highlights)
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let pageViewports = {}; // Map of pageIndex -> viewport (for rect calc)
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document.addEventListener('DOMContentLoaded', async () => {
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const pdfUrl = '<?= h($fileUrl) ?>';
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const container = document.getElementById('flipbook');
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const loader = document.getElementById('flipbook-loader');
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const loaderStatus = document.getElementById('loader-status');
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const currentSpan = document.getElementById('page-current');
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const totalSpan = document.getElementById('page-total');
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const viewerContainer = document.getElementById('viewer-container');
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// Set worker
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pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
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try {
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const loadingTask = pdfjsLib.getDocument(pdfUrl);
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loadingTask.onProgress = (p) => {
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if (p.total > 0) {
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const percent = Math.round((p.loaded / p.total) * 100);
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loaderStatus.textContent = `Downloading... ${percent}%`;
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}
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};
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pdfDoc = await loadingTask.promise;
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const totalPages = pdfDoc.numPages;
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totalSpan.textContent = totalPages;
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loaderStatus.textContent = 'Rendering pages...';
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// --- Layout Logic ---
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const availWidth = viewerContainer.clientWidth - 40;
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const availHeight = viewerContainer.clientHeight - 40;
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const firstPage = await pdfDoc.getPage(1);
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const viewport = firstPage.getViewport({ scale: 1 });
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const aspectRatio = viewport.width / viewport.height;
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let bookHeight = availHeight;
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let bookWidth = bookHeight * aspectRatio;
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if (bookWidth * 2 > availWidth) {
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bookWidth = availWidth / 2;
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bookHeight = bookWidth / aspectRatio;
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}
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const renderScale = (bookHeight / viewport.height) * 1.5;
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// --- Page Generation ---
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const canvasPromises = [];
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for (let i = 1; i <= totalPages; i++) {
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const pageDiv = document.createElement('div');
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pageDiv.className = 'page';
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// Structure:
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// .page-content (relative)
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// -> .pdf-canvas (absolute, z=1)
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// -> .highlight-canvas (absolute, z=2, pointer-events: none)
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const contentDiv = document.createElement('div');
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contentDiv.style.position = 'relative';
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contentDiv.style.width = '100%';
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contentDiv.style.height = '100%';
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contentDiv.style.overflow = 'hidden';
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const pdfCanvas = document.createElement('canvas');
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pdfCanvas.style.position = 'absolute';
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pdfCanvas.style.top = '0';
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pdfCanvas.style.left = '0';
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pdfCanvas.style.width = '100%';
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pdfCanvas.style.height = '100%';
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const hlCanvas = document.createElement('canvas');
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hlCanvas.style.position = 'absolute';
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hlCanvas.style.top = '0';
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hlCanvas.style.left = '0';
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hlCanvas.style.width = '100%';
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hlCanvas.style.height = '100%';
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hlCanvas.style.pointerEvents = 'none'; // Click through to page
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contentDiv.appendChild(pdfCanvas);
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contentDiv.appendChild(hlCanvas);
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pageDiv.appendChild(contentDiv);
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container.appendChild(pageDiv);
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// Render Async
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canvasPromises.push(async () => {
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const page = await pdfDoc.getPage(i);
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const vp = page.getViewport({ scale: renderScale });
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// Setup PDF Canvas
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pdfCanvas.height = vp.height;
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pdfCanvas.width = vp.width;
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const ctx = pdfCanvas.getContext('2d');
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// Setup Highlight Canvas (match dims)
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hlCanvas.height = vp.height;
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hlCanvas.width = vp.width;
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const hlCtx = hlCanvas.getContext('2d');
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// Store refs for search
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pageHighlighters[i] = hlCtx;
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pageViewports[i] = vp;
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await page.render({ canvasContext: ctx, viewport: vp }).promise;
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});
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}
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await Promise.all(canvasPromises.map(fn => fn()));
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// --- Init Flipbook ---
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loader.style.display = 'none';
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container.style.display = 'block';
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pageFlip = new St.PageFlip(container, {
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width: bookWidth,
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height: bookHeight,
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size: 'fixed',
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showCover: true,
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maxShadowOpacity: 0.5
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});
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pageFlip.loadFromHTML(document.querySelectorAll('.page'));
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// --- Events ---
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pageFlip.on('flip', (e) => {
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document.getElementById('page-current').textContent = (pageFlip.getCurrentPageIndex() + 1);
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});
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document.getElementById('btn-prev').addEventListener('click', () => pageFlip.flipPrev());
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document.getElementById('btn-next').addEventListener('click', () => pageFlip.flipNext());
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// Keyboard
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document.addEventListener('keydown', (e) => {
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if (e.target.tagName === 'INPUT') return; // Don't flip when typing
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if (e.key === 'ArrowLeft') pageFlip.flipPrev();
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if (e.key === 'ArrowRight') pageFlip.flipNext();
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});
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// --- Search Implementation ---
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setupSearch();
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} catch (error) {
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console.error(error);
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loader.innerHTML = '<div class="text-danger p-3">Error: ' + error.message + '</div>';
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}
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});
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// --- Search Logic ---
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function setupSearch() {
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const input = document.getElementById('searchInput');
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const btnPrev = document.getElementById('btn-search-prev');
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const btnNext = document.getElementById('btn-search-next');
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const status = document.getElementById('search-status');
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let debounceTimer;
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input.addEventListener('input', (e) => {
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clearTimeout(debounceTimer);
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debounceTimer = setTimeout(() => {
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performSearch(e.target.value.trim());
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}, 600);
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});
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input.addEventListener('keydown', (e) => {
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if (e.key === 'Enter') {
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clearTimeout(debounceTimer);
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performSearch(input.value.trim());
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}
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});
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btnNext.addEventListener('click', () => {
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if (searchResults.length === 0) return;
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currentMatchIndex = (currentMatchIndex + 1) % searchResults.length;
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showMatch(currentMatchIndex);
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});
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btnPrev.addEventListener('click', () => {
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if (searchResults.length === 0) return;
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currentMatchIndex = (currentMatchIndex - 1 + searchResults.length) % searchResults.length;
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showMatch(currentMatchIndex);
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});
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}
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async function performSearch(query) {
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const status = document.getElementById('search-status');
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// Clear previous highlights
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Object.values(pageHighlighters).forEach(ctx => {
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ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
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});
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if (!query || query.length < 2) {
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searchResults = [];
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currentMatchIndex = -1;
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status.textContent = '';
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return;
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}
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status.textContent = 'Searching...';
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searchResults = [];
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currentMatchIndex = -1;
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try {
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// Loop all pages
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for (let i = 1; i <= pdfDoc.numPages; i++) {
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const page = await pdfDoc.getPage(i);
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const textContent = await page.getTextContent();
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const viewport = pageViewports[i]; // Use stored viewport
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const ctx = pageHighlighters[i];
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// Simple Item Search
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// Note: This matches text *within* individual text items.
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// Complex multi-item matches (spanning lines/chunks) are harder.
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textContent.items.forEach(item => {
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if (item.str.toLowerCase().includes(query.toLowerCase())) {
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// Found a match!
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// item.transform is [scaleX, skewY, skewX, scaleY, tx, ty]
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// The PDF coordinate system origin is bottom-left (usually).
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// Calculate approximate bounding box
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// We need the width of the item. 'item.width' is available in recent pdf.js
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// If not, we estimate.
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const tx = item.transform;
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// Basic rect in PDF coords:
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// x = tx[4], y = tx[5]
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// w = item.width, h = item.height (or font size?)
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// Note: item.height is often 0 or undefined in raw items, use tx[3] (scaleY) as approx font height
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let x = tx[4];
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let y = tx[5];
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let w = item.width;
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let h = Math.sqrt(tx[0]*tx[0] + tx[1]*tx[1]); // approximate font size from scale
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if (!w) w = h * item.str.length * 0.5; // fallback
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// Adjust for y-flip?
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// pdf.js viewport.convertToViewportRectangle handles the coordinate transform
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// including the y-flip if the viewport is set up that way.
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// Text items are bottom-left origin?
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// We usually need to move y up by 'h' because rects are top-left?
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// Actually, let's just transform (x, y) and (x+w, y+h)
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// PDF text is usually baseline.
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// So the rect starts at y (baseline) and goes up by h?
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// Or starts at y-h?
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// Let's assume y is baseline.
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const rect = [x, y, x + w, y + h];
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const viewRect = viewport.convertToViewportRectangle(rect);
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// viewRect is [x1, y1, x2, y2]
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// normalize
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const rx = Math.min(viewRect[0], viewRect[2]);
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const ry = Math.min(viewRect[1], viewRect[3]);
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const rw = Math.abs(viewRect[0] - viewRect[2]);
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const rh = Math.abs(viewRect[1] - viewRect[3]);
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// Draw highlight (Yellow, 40% opacity)
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ctx.fillStyle = 'rgba(255, 235, 59, 0.4)';
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ctx.fillRect(rx, ry, rw, rh);
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// Add border for visibility
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ctx.strokeStyle = 'rgba(255, 193, 7, 0.8)';
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ctx.lineWidth = 1;
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ctx.strokeRect(rx, ry, rw, rh);
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// Add to results (one per page is enough for navigation, but we highlight all)
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// We only push to searchResults if it's the *first* match on this page
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// OR we push every match?
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// Let's push every match for "Next" button granularity.
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searchResults.push({
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pageIndex: i - 1, // 0-based for PageFlip
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label: `Page ${i}`
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});
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}
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});
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}
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if (searchResults.length > 0) {
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currentMatchIndex = 0;
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status.textContent = `${searchResults.length} matches`;
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showMatch(0);
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} else {
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status.textContent = 'No matches';
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}
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} catch (e) {
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console.error('Search failed', e);
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status.textContent = 'Error';
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}
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}
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function showMatch(index) {
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if (index < 0 || index >= searchResults.length) return;
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const match = searchResults[index];
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// Update status text
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document.getElementById('search-status').textContent = `${index + 1} / ${searchResults.length}`;
|
|
|
|
// Flip to page
|
|
// PageFlip 0-based index
|
|
// Check if we are already there to avoid animation loop?
|
|
// PageFlip handles it.
|
|
|
|
// Note: If view is 'spread', we might need to check if the page is visible.
|
|
// But flip() is safe.
|
|
pageFlip.flip(match.pageIndex);
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
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