| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package io.flutter.plugins.webviewflutter; |
| |
| import android.webkit.DownloadListener; |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| import io.flutter.plugins.webviewflutter.GeneratedAndroidWebView.DownloadListenerHostApi; |
| |
| /** |
| * Host api implementation for {@link DownloadListener}. |
| * |
| * <p>Handles creating {@link DownloadListener}s that intercommunicate with a paired Dart object. |
| */ |
| public class DownloadListenerHostApiImpl implements DownloadListenerHostApi { |
| private final InstanceManager instanceManager; |
| private final DownloadListenerCreator downloadListenerCreator; |
| private final DownloadListenerFlutterApiImpl flutterApi; |
| |
| /** |
| * Implementation of {@link DownloadListener} that passes arguments of callback methods to Dart. |
| * |
| * <p>No messages are sent to Dart after {@link DownloadListenerImpl#release} is called. |
| */ |
| public static class DownloadListenerImpl implements DownloadListener, Releasable { |
| @Nullable private DownloadListenerFlutterApiImpl flutterApi; |
| |
| /** |
| * Creates a {@link DownloadListenerImpl} that passes arguments of callbacks methods to Dart. |
| * |
| * @param flutterApi handles sending messages to Dart |
| */ |
| public DownloadListenerImpl(@NonNull DownloadListenerFlutterApiImpl flutterApi) { |
| this.flutterApi = flutterApi; |
| } |
| |
| @Override |
| public void onDownloadStart( |
| String url, |
| String userAgent, |
| String contentDisposition, |
| String mimetype, |
| long contentLength) { |
| if (flutterApi != null) { |
| flutterApi.onDownloadStart( |
| this, url, userAgent, contentDisposition, mimetype, contentLength, reply -> {}); |
| } |
| } |
| |
| @Override |
| public void release() { |
| if (flutterApi != null) { |
| flutterApi.dispose(this, reply -> {}); |
| } |
| flutterApi = null; |
| } |
| } |
| |
| /** Handles creating {@link DownloadListenerImpl}s for a {@link DownloadListenerHostApiImpl}. */ |
| public static class DownloadListenerCreator { |
| /** |
| * Creates a {@link DownloadListenerImpl}. |
| * |
| * @param flutterApi handles sending messages to Dart |
| * @return the created {@link DownloadListenerImpl} |
| */ |
| public DownloadListenerImpl createDownloadListener(DownloadListenerFlutterApiImpl flutterApi) { |
| return new DownloadListenerImpl(flutterApi); |
| } |
| } |
| |
| /** |
| * Creates a host API that handles creating {@link DownloadListener}s. |
| * |
| * @param instanceManager maintains instances stored to communicate with Dart objects |
| * @param downloadListenerCreator handles creating {@link DownloadListenerImpl}s |
| * @param flutterApi handles sending messages to Dart |
| */ |
| public DownloadListenerHostApiImpl( |
| InstanceManager instanceManager, |
| DownloadListenerCreator downloadListenerCreator, |
| DownloadListenerFlutterApiImpl flutterApi) { |
| this.instanceManager = instanceManager; |
| this.downloadListenerCreator = downloadListenerCreator; |
| this.flutterApi = flutterApi; |
| } |
| |
| @Override |
| public void create(Long instanceId) { |
| final DownloadListener downloadListener = |
| downloadListenerCreator.createDownloadListener(flutterApi); |
| instanceManager.addDartCreatedInstance(downloadListener, instanceId); |
| } |
| } |