loadPaths static method

Future<Map<JiebaDictType, String>> loadPaths()

获取内置结巴分词文件在 AssetBundle 中的路径。由于涉及访问 AssetBundle 的资源，该方法需要在主隔离（Main Isolate）中调用。

• 非 Web 平台：packages/sqlite3_simple/cpp_jieba_dict/xxx.utf8，可通过 rootBundle 或 DefaultAssetBundle.of 在主隔离中调用 AssetBundle.load 加载文件内容；
• Web 平台：assets/packages/sqlite3_simple/cpp_jieba_dict/xxx.utf8，建议在 Web Worker 调用 JavaScript 的 fetch 加载文件内容，而不要在主隔离中加载后再传递给 Web Worker，避免跨线程复制的开销 。

Implementation

static Future<Map<JiebaDictType, String>> loadPaths() async {
  final assetManifest = await AssetManifest.loadFromAssetBundle(rootBundle);
  final kind2path = <JiebaDictType, String>{};
  for (final path in assetManifest.listAssets()) {
    if (!path.startsWith("packages/sqlite3_simple") ||
        !path.contains("cpp_jieba_dict")) {
      continue;
    }
    final kind = JiebaDictType.byFilename[basename(path)];
    if (kind == null) {
      continue;
    }
    kind2path[kind] = resolveAssetPath(path);
  }
  return kind2path;
}