From b9edb0a417792d9c4ff9387501225f96a3e1e7e8 Mon Sep 17 00:00:00 2001
From: Takashi Kawasaki <espresso3389@gmail.com>
Date: Thu, 13 Feb 2025 14:21:31 +0900
Subject: [PATCH] WIP

---
 lib/src/web/pdf.js.dart | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/src/web/pdf.js.dart b/lib/src/web/pdf.js.dart
index d0f15ef..ff0e4ab 100644
--- a/lib/src/web/pdf.js.dart
+++ b/lib/src/web/pdf.js.dart
@@ -4,9 +4,12 @@
 library;
 
 import 'dart:js_interop';
+import 'dart:js_interop_unsafe';
 import 'dart:typed_data';
 
+import 'package:flutter/material.dart';
 import 'package:synchronized/extension.dart';
+import 'package:web/helpers.dart';
 import 'package:web/web.dart' as web;
 
 import '../../pdfrx.dart';
@@ -286,6 +289,15 @@ final _dummyJsSyncContext = {};
 
 bool _pdfjsInitialized = false;
 
+bool get _isSharedArrayBufferSupported {
+  try {
+    // Check if SharedArrayBuffer exists in the global JavaScript context
+    return window.hasProperty('SharedArrayBuffer'.toJS).toDart;
+  } catch (e) {
+    return false;
+  }
+}
+
 Future<void> ensurePdfjsInitialized() async {
   if (_pdfjsInitialized) return;
   await _dummyJsSyncContext.synchronized(() async {
@@ -295,6 +307,11 @@ Future<void> ensurePdfjsInitialized() async {
       return;
     }
 
+    const isRunningWithWasm = bool.fromEnvironment('dart.tool.dart2wasm');
+    debugPrint(
+      'Running WASM: $isRunningWithWasm\nSharedArrayBuffer ${_isSharedArrayBufferSupported ? 'supported' : 'not supported'}}',
+    );
+
     final pdfJsSrc = PdfJsConfiguration.configuration?.pdfJsSrc ?? _pdfjsUrl;
     try {
       final script =