/**
* Preview Module
* Opens file preview in a separate popup window
*/
(function() {
'use strict';
let currentBlobUrl = null;
let currentFile = null;
let currentRowIndex = null;
let previewWindow = null;
// Use shared extension lists from window.zddc.preview where possible
const IMAGE_EXTENSIONS = zddc.preview.IMAGE_EXTENSIONS;
const TIFF_EXTENSIONS = zddc.preview.TIFF_EXTENSIONS;
const TEXT_EXTENSIONS = zddc.preview.TEXT_EXTENSIONS;
const PDF_EXTENSIONS = ['pdf'];
const ZIP_EXTENSIONS = ['zip'];
// Lazily load a script from CDN — delegates to shared cache.
const loadLibrary = zddc.preview.loadLibrary;
/**
* Initialize preview module
*/
function init() {
// Listen for row focused events from selection module
document.addEventListener('rowfocused', handleRowFocused);
// Set up toggle button to open/close preview window
const toggleBtn = document.getElementById('togglePreviewBtn');
if (toggleBtn) {
toggleBtn.addEventListener('click', () => {
if (previewWindow && !previewWindow.closed) {
// Close preview window
previewWindow.close();
previewWindow = null;
toggleBtn.classList.remove('preview-active');
} else if (currentFile) {
openPreviewWindow(currentFile);
toggleBtn.classList.add('preview-active');
}
});
}
}
/**
* Handle row focused event
*/
function handleRowFocused(e) {
const { rowIndex, file } = e.detail;
currentRowIndex = rowIndex;
if (file && file !== currentFile) {
currentFile = file;
// Update preview window if open
if (previewWindow && !previewWindow.closed) {
openPreviewWindow(file);
}
}
}
/**
* Open preview in a separate popup window
*/
async function openPreviewWindow(file) {
if (!file) return;
currentFile = file;
try {
const blob = await getFileBlob(file);
// Clean up previous blob URL
if (currentBlobUrl) {
URL.revokeObjectURL(currentBlobUrl);
}
currentBlobUrl = URL.createObjectURL(blob);
const fileName = zddc.joinExtension(file.originalFilename, file.extension);
// Build preview HTML with toolbar
const previewHtml = `
${escapeHtml(fileName)} - Preview
${escapeHtml(fileName)}
${await getPreviewContent(file, currentBlobUrl)}