// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Entry point to the Print Preview PDF Viewer UI.
import './pdf_print_wrapper.js';
import { createBrowserApiForPrintPreview } from './browser_api.js';
/**
 * Stores any pending messages received which should be passed to the
 * PDFViewer when it is created.
 */
const pendingMessages = [];
/**
 * Handles events that are received prior to the PDFViewer being created.
 */
function handleScriptingMessage(message) {
    pendingMessages.push(message);
}
/**
 * Initialize the global PDFViewer and pass any outstanding messages to it.
 */
function initViewer(browserApi) {
    // JS always blocked in Print Preview.
    browserApi.getStreamInfo().javascript = 'block';
    // PDFViewer will handle any messages after it is created.
    window.removeEventListener('message', handleScriptingMessage, false);
    const viewer = document.querySelector('pdf-viewer-print');
    viewer.init(browserApi);
    while (pendingMessages.length > 0) {
        viewer.handleScriptingMessage(pendingMessages.shift());
    }
    Object.assign(window, { viewer });
}
/**
 * Entrypoint for starting the PDF viewer. This function obtains the browser
 * API for the PDF and initializes the PDF Viewer.
 */
function main() {
    // Set up an event listener to catch scripting messages which are sent prior
    // to the PDFViewer being created.
    window.addEventListener('message', handleScriptingMessage, false);
    createBrowserApiForPrintPreview().then(initViewer);
}
main();
