EIS/mod_pdf_tree/tmpl/default.php

<?php defined('_JEXEC') or die; ?>

<style>
/* =========================
   Layout-Container
   ========================= */
.pdf-tree-wrapper {
  display: flex;
  align-items: stretch;           /* wichtig für scrollende Kinder */
  gap: 1em;
  background: #f9f9f9;
  padding: 1em;
  border: 1px solid #ddd;
  border-radius: 6px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  min-height: 0;                  /* erlaubt Overflow in Flex-Kindern */
}

/* Linke Spalte: Baum */
.pdf-tree-container {
  flex: 0 0 30%;
  max-height: calc(var(--vh, 100vh) - 160px);  /* robust auf Desktop/iPad */
  overflow: auto;
  -webkit-overflow-scrolling: touch;           /* smooth scroll iOS */
  min-height: 0;                               /* wichtig für Scrollbar */
}

/* Rechte Spalte: Vorschau */
#pdf-preview {
  flex: 1 1 auto;
  min-width: 320px;                            /* iPad-freundlicher als 800px */
  height: calc(var(--vh, 100vh) - 160px);
  border: 1px solid #ccc;
  background: #fff;
  display: none;                                /* wird erst bei Klick sichtbar */
  min-height: 0;
  position: relative;
}

/* Preview-Toolbar / Fallback-Link */
.preview-actions {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding: .5rem .75rem;
  border-bottom: 1px solid #eee;
  background: #fafafa;
}
.preview-actions a,
.preview-actions button {
  font: inherit;
  border: 1px solid #ccc;
  background: #fff;
  border-radius: 4px;
  padding: .35rem .6rem;
}

/* iFrame */
#pdf-preview iframe {
  width: 100%;
  height: calc(100% - 42px); /* Platz für .preview-actions */
  border: none;
  display: block;
}

/* =========================
   Baum-Liste
   ========================= */
.pdf-tree { list-style: none; margin: 0; padding: 0; }
.pdf-tree ul { list-style: none; margin-left: 1.25em; padding: 0; display: none; }
.pdf-tree li { margin: 0.35em 0; }

/* Touch-freundliche Tap-Ziele */
.folder > .toggle {
  cursor: pointer;
  width: 1.5em;                    /* größer für Finger */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  margin-right: .1em;
}
.folder > .folder-label {          /* gesamten Text klickbar machen */
  cursor: pointer;
  user-select: none;
  padding: .15rem .1rem;           /* kleine Hitbox-Polster */
  border-radius: 3px;
}
.folder > .folder-label:active { background: rgba(0,0,0,0.05); }

.pdf-tree .meta { color: #666; }

/* Datei-Link */
.file-link {
  text-decoration: none;
  color: #0366d6;
}
.file-link:hover { text-decoration: underline; }
.file-link:active { opacity: .7; }

/* Buttons */
.expand-collapse {
  margin-bottom: 0.5em;
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.expand-collapse button {
  margin-right: 0; /* via gap */
  font: inherit;
  border: 1px solid #ccc;
  background: #fff;
  border-radius: 4px;
  padding: .4rem .6rem;
}

/* Scrollbar-Optik (optional) */
.pdf-tree-container::-webkit-scrollbar { width: 10px; }
.pdf-tree-container::-webkit-scrollbar-thumb { background: rgba(0,0,0,.2); border-radius: 6px; }

/* =========================
   Responsive: iPad Portrait / schmal
   ========================= */
@media (max-width: 1024px) {
  .pdf-tree-wrapper { flex-direction: column; }
  .pdf-tree-container,
  #pdf-preview {
    max-height: calc(var(--vh, 100vh) - 220px);
    height: auto;
  }
}
</style>

<!-- Buttons: Aus-/Einklappen -->
<div class="expand-collapse">
  <button id="expand-all" type="button">ausklappen</button>
  <button id="collapse-all" type="button">einklappen</button>
</div>

<!-- PDF-Baum und Vorschau -->
<div class="pdf-tree-wrapper">
  <div class="pdf-tree-container">
    <?= ModEisAnzeigeHelper::renderTree($items); ?>
  </div>

  <div id="pdf-preview">
    <div class="preview-actions">
      <span id="preview-filename" aria-live="polite"></span>
      <a id="open-newtab" href="#" target="_blank" rel="noopener">in neuem Tab öffnen</a>
    </div>
    <!-- iFrame wird dynamisch eingesetzt -->
  </div>
</div>

<script>
// --- echtes Viewport-Height-Polyfill (fix für Safari/macOS/iOS) ---
function setRealVh() {
  const vh = window.innerHeight * 0.01;
  document.documentElement.style.setProperty('--vh', `${vh * 100}px`);
}
setRealVh();
window.addEventListener('resize', setRealVh, { passive: true });

document.addEventListener('DOMContentLoaded', function () {
  const treeContainer = document.querySelector('.pdf-tree-container');
  const preview = document.getElementById('pdf-preview');
  if (!treeContainer || !preview) return;

  const previewBar = preview.querySelector('.preview-actions');
  const openNewTab = document.getElementById('open-newtab');
  const previewName = document.getElementById('preview-filename');

  // --- (1) Verzeichnisse toggeln – Caret und Label (Event Delegation, robust für iPad) ---
  treeContainer.addEventListener('click', (ev) => {
    const t = ev.target;

    // Toggle per Caret
    if (t.classList.contains('toggle')) {
      const li = t.closest('li.folder');
      if (!li) return;
      const ul = li.querySelector(':scope > ul');
      if (!ul) return;
      const visible = ul.style.display === 'block';
      ul.style.display = visible ? 'none' : 'block';
      t.textContent = visible ? '▶' : '▼';
      return;
    }

    // Toggle per Ordner-Label
    if (t.classList.contains('folder-label')) {
      const li = t.closest('li.folder');
      if (!li) return;
      const caret = li.querySelector(':scope > .toggle');
      if (caret) caret.click();
      return;
    }
  });

  // --- (2) Alle ausklappen (mit Scroll-to-top) ---
  document.getElementById('expand-all')?.addEventListener('click', () => {
    document.querySelectorAll('.pdf-tree ul').forEach(ul => ul.style.display = 'block');
    document.querySelectorAll('.pdf-tree .toggle').forEach(t => t.textContent = '▼');
    treeContainer.scrollTo({ top: 0, behavior: 'instant' });
  });

  // --- (3) Alle einklappen ---
  document.getElementById('collapse-all')?.addEventListener('click', () => {
    document.querySelectorAll('.pdf-tree ul').forEach(ul => ul.style.display = 'none');
    document.querySelectorAll('.pdf-tree .toggle').forEach(t => t.textContent = '▶');
  });

  // --- (4) PDF-Vorschau + Fallback-Link (iOS: iframe kann zickig sein) ---
  treeContainer.addEventListener('click', (ev) => {
    const a = ev.target.closest('.file-link');
    if (!a) return;

    ev.preventDefault();

    preview.style.display = 'block';
    previewBar.style.display = 'flex';
    previewName.textContent = a.getAttribute('data-filename') || a.textContent.trim();
    openNewTab.href = a.href;

    // iFrame neu setzen
    preview.querySelector('iframe')?.remove();
    const iframe = document.createElement('iframe');
    iframe.setAttribute('title', 'PDF-Vorschau');
    iframe.src = a.href;
    iframe.loading = 'lazy';

    // iOS Fallback: Wenn Onload nicht in 1.5s triggert, Link oben verwenden
    let loaded = false;
    const t = setTimeout(() => { /* optional Hinweis einblenden */ }, 1500);
    iframe.addEventListener('load', () => { loaded = true; clearTimeout(t); }, { once: true });

    preview.appendChild(iframe);
  }, { passive: false });
});
</script>