[video_player] Add web implementation using platform interface

packages/video_player/video_player_web/CHANGELOG.md

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+## 0.1.0
+
+* Initial release

packages/video_player/video_player_web/LICENSE

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+// Copyright 2017 The Chromium Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

packages/video_player/video_player_web/README.md

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+# video_player_web
+
+The web implementation of [`video_player`][1].
+
+## Usage
+
+To use this plugin in your Flutter Web app, simply add it as a dependency in
+your pubspec using a `git` dependency. This is only temporary: in the future
+we hope to make this package an "endorsed" implementation of `video_player`,
+so that it is automatically included in your Flutter Web app when you depend
+on `package:video_player`.
+
+```yaml
+dependencies:
+  video_player: ^0.10.4
+  video_player_web:
+    git:
+      url: git://github.com/flutter/plugins.git
+      path: packages/video_player/video_player_web
+```
+
+Once you have the `video_player_web` dependency in your pubspec, you should
+be able to use `package:video_player` as normal.
+
+## Autoplay
+Playing videos without prior interaction with the site might be prohibited
+by the browser and lead to runtime errors. See also: https://goo.gl/xX8pDD.
+
+[1]: ../video_player

packages/video_player/video_player_web/ios/video_player_web.podspec

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+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
+#
+Pod::Spec.new do |s|
+  s.name             = 'video_player_web'
+  s.version          = '0.0.1'
+  s.summary          = 'No-op implementation of video_player_web web plugin to avoid build issues on iOS'
+  s.description      = <<-DESC
+temp fake video_player_web plugin
+                       DESC
+  s.homepage         = 'https://github.com/flutter/plugins/tree/master/packages/video_player/video_player_web'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Flutter Team' => 'flutter-dev@googlegroups.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.public_header_files = 'Classes/**/*.h'
+  s.dependency 'Flutter'
+
+  s.ios.deployment_target = '8.0'
+end

packages/video_player/video_player_web/lib/video_player_web.dart

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+import 'dart:async';
+import 'dart:html';
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:flutter_web_plugins/flutter_web_plugins.dart';
+import 'package:video_player_platform_interface/video_player_platform_interface.dart';
+
+/// The web implementation of [VideoPlayerPlatform].
+///
+/// This class implements the `package:video_player` functionality for the web.
+class VideoPlayerPlugin extends VideoPlayerPlatform {
+  /// Registers this class as the default instance of [VideoPlayerPlatform].
+  static void registerWith(Registrar registrar) {
+    VideoPlayerPlatform.instance = VideoPlayerPlugin();
+  }
+
+  Map<int, _VideoPlayer> _videoPlayers = <int, _VideoPlayer>{};
+
+  int _textureCounter = 1;
+
+  @override
+  Future<void> init() async {
+    return _disposeAllPlayers();
+  }
+
+  @override
+  Future<void> dispose(int textureId) async {
+    _videoPlayers[textureId].dispose();
+    _videoPlayers.remove(textureId);
+    return null;
+  }
+
+  void _disposeAllPlayers() {
+    _videoPlayers.values
+        .forEach((_VideoPlayer videoPlayer) => videoPlayer.dispose());
+    _videoPlayers.clear();
+  }
+
+  @override
+  Future<int> create(DataSource dataSource) async {
+    final int textureId = _textureCounter;
+    _textureCounter++;
+
+    final _VideoPlayer player = _VideoPlayer(
+      uri: Uri.parse(dataSource.uri),
+      textureId: textureId,
+    );
+
+    player.initialize();
+
+    _videoPlayers[textureId] = player;
+    return textureId;
+  }
+
+  @override
+  Future<void> setLooping(int textureId, bool looping) async {
+    return _videoPlayers[textureId].setLooping(looping);
+  }
+
+  @override
+  Future<void> play(int textureId) async {
+    return _videoPlayers[textureId].play();
+  }
+
+  @override
+  Future<void> pause(int textureId) async {
+    return _videoPlayers[textureId].pause();
+  }
+
+  @override
+  Future<void> setVolume(int textureId, double volume) async {
+    return _videoPlayers[textureId].setVolume(volume);
+  }
+
+  @override
+  Future<void> seekTo(int textureId, Duration position) async {
+    return _videoPlayers[textureId].seekTo(position);
+  }
+
+  @override
+  Future<Duration> getPosition(int textureId) async {
+    _videoPlayers[textureId].sendBufferingUpdate();
+    return _videoPlayers[textureId].getPosition();
+  }
+
+  @override
+  Stream<VideoEvent> videoEventsFor(int textureId) {
+    return _videoPlayers[textureId].eventController.stream;
+  }
+
+  @override
+  Widget buildView(int textureId) {
+    return HtmlElementView(viewType: 'videoPlayer-$textureId');
+  }
+}
+
+class _VideoPlayer {
+  _VideoPlayer({this.uri, this.textureId});
+
+  final StreamController<VideoEvent> eventController =
+      StreamController<VideoEvent>();
+
+  final Uri uri;
+  final int textureId;
+  VideoElement videoElement;
+  bool isInitialized = false;
+
+  void initialize() {
+    videoElement = VideoElement()
+      ..src = uri.toString()
+      ..autoplay = false
+      ..controls = false
+      ..style.border = 'none';
+
+    // TODO(hterkelsen): Use initialization parameters once they are available
+    // ignore: undefined_prefixed_name
+    ui.platformViewRegistry.registerViewFactory(
+        'videoPlayer-$textureId', (int viewId) => videoElement);
+
+    videoElement.onCanPlay.listen((dynamic _) {
+      if (!isInitialized) {
+        isInitialized = true;
+        sendInitialized();
+      }
+    });
+    videoElement.onError.listen((dynamic error) {
+      eventController.addError(error);
+    });
+    videoElement.onEnded.listen((dynamic _) {
+      eventController.add(VideoEvent(eventType: VideoEventType.completed));
+    });
+  }
+
+  void sendBufferingUpdate() {
+    eventController.add(VideoEvent(
+      buffered: _toDurationRange(videoElement.buffered),
+      eventType: VideoEventType.bufferingUpdate,
+    ));
+  }
+
+  void play() {
+    videoElement.play();
+  }
+
+  void pause() {
+    videoElement.pause();
+  }
+
+  void setLooping(bool value) {
+    videoElement.loop = value;
+  }
+
+  void setVolume(double value) {
+    videoElement.volume = value;
+  }
+
+  void seekTo(Duration position) {
+    videoElement.currentTime = position.inMilliseconds.toDouble() / 1000;
+  }
+
+  Duration getPosition() {
+    return Duration(milliseconds: (videoElement.currentTime * 1000).round());
+  }
+
+  void sendInitialized() {
+    eventController.add(
+      VideoEvent(
+        eventType: VideoEventType.initialized,
+        duration: Duration(
+          milliseconds: (videoElement.duration * 1000).round(),
+        ),
+        size: Size(
+          videoElement.videoWidth.toDouble() ?? 0.0,
+          videoElement.videoHeight.toDouble() ?? 0.0,
+        ),
+      ),
+    );
+  }
+
+  void dispose() {
+    videoElement.removeAttribute('src');
+    videoElement.load();
+  }
+
+  List<DurationRange> _toDurationRange(TimeRanges buffered) {
+    final List<DurationRange> durationRange = <DurationRange>[];
+    for (int i = 0; i < buffered.length; i++) {
+      durationRange.add(DurationRange(
+        Duration(milliseconds: (buffered.start(i) * 1000).round()),
+        Duration(milliseconds: (buffered.end(i) * 1000).round()),
+      ));
+    }
+    return durationRange;
+  }
+}

packages/video_player/video_player_web/pubspec.yaml

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+name: video_player_web
+description: Web platform implementation of video_player
+author: Flutter Team <flutter-dev@googlegroups.com>
+homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player_web
+version: 0.1.0
+
+flutter:
+  plugin:
+    platforms:
+      web:
+        pluginClass: VideoPlayerPlugin
+        fileName: video_player_web.dart
+
+dependencies:
+  flutter:
+    sdk: flutter
+  flutter_web_plugins:
+    sdk: flutter
+  meta: ^1.1.7
+  video_player_platform_interface: ^1.0.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+  video_player:
+    path: ../video_player
+
+environment:
+  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  flutter: ">=1.5.0 <2.0.0"