Remove ChildView widget (#6195)
This widget now lives in Mozart: https://fuchsia.googlesource.com/mozart/+/master/lib/flutter/child_view.dart
This commit is contained in:
Adam Barth
GitHub
parent
8071a82d51
commit
67f97b455d
@ -1,254 +0,0 @@
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:math' as math;
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import 'package:flutter/material.dart';
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class LauncherData {
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const LauncherData({ this.url, this.title });
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final String url;
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final String title;
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}
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final List<LauncherData> _kLauncherData = <LauncherData>[
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const LauncherData(
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url: 'mojo:noodles_view',
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title: 'Noodles'
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),
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const LauncherData(
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url: 'mojo:shapes_view',
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title: 'Shapes'
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),
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new LauncherData(
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url: Uri.base.resolve('../../../examples/stocks/build/app.flx').toString(),
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title: 'Stocks'
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),
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];
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const Size _kInitialWindowSize = const Size(200.0, 200.0);
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const double _kWindowPadding = 10.0;
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enum WindowSide {
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topCenter,
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topRight,
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bottomRight,
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}
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class WindowDecoration extends StatelessWidget {
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WindowDecoration({
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Key key,
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this.side,
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this.color,
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this.onTap,
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this.onPanUpdate
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}) : super(key: key);
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final WindowSide side;
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final Color color;
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final GestureTapCallback onTap;
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final GestureDragUpdateCallback onPanUpdate;
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@override
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Widget build(BuildContext context) {
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double top, right, bottom, left, width, height;
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height = _kWindowPadding * 2.0;
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if (side == WindowSide.topCenter || side == WindowSide.topRight)
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top = 0.0;
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if (side == WindowSide.topRight || side == WindowSide.bottomRight) {
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right = 0.0;
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width = _kWindowPadding * 2.0;
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}
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if (side == WindowSide.topCenter) {
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left = _kWindowPadding;
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right = _kWindowPadding;
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}
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if (side == WindowSide.bottomRight)
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bottom = 0.0;
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return new Positioned(
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top: top,
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right: right,
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bottom: bottom,
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left: left,
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width: width,
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height: height,
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child: new GestureDetector(
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onTap: onTap,
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onPanUpdate: onPanUpdate,
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child: new Container(
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decoration: new BoxDecoration(
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backgroundColor: color
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)
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)
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)
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);
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}
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}
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class Window extends StatefulWidget {
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Window({ Key key, this.child, this.onClose }) : super(key: key);
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final ChildViewConnection child;
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final ValueChanged<ChildViewConnection> onClose;
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@override
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_WindowState createState() => new _WindowState();
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}
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class _WindowState extends State<Window> {
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Offset _offset = Offset.zero;
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Size _size = _kInitialWindowSize;
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void _handleResizerDrag(DragUpdateDetails details) {
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setState(() {
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_size = new Size(
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math.max(0.0, _size.width + details.delta.dx),
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math.max(0.0, _size.height + details.delta.dy)
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);
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});
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}
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void _handleRepositionDrag(DragUpdateDetails details) {
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setState(() {
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_offset += details.delta;
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});
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}
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void _handleClose() {
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config.onClose(config.child);
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}
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@override
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Widget build(BuildContext context) {
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return new Positioned(
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left: _offset.dx,
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top: _offset.dy,
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width: _size.width + _kWindowPadding * 2.0,
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height: _size.height + _kWindowPadding * 2.0,
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child: new Stack(
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children: <Widget>[
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new WindowDecoration(
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side: WindowSide.topCenter,
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onPanUpdate: _handleRepositionDrag,
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color: Colors.green[200]
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),
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new WindowDecoration(
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side: WindowSide.topRight,
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onTap: _handleClose,
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color: Colors.red[200]
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),
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new WindowDecoration(
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side: WindowSide.bottomRight,
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onPanUpdate: _handleResizerDrag,
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color: Colors.blue[200]
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),
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new Container(
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padding: const EdgeInsets.all(_kWindowPadding),
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child: new Material(
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elevation: 8,
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child: new ChildView(child: config.child)
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)
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)
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]
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)
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);
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}
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}
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class LauncherItem extends StatelessWidget {
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LauncherItem({
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Key key,
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this.url,
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this.child,
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this.onLaunch
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}) : super(key: key);
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final String url;
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final Widget child;
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final ValueChanged<ChildViewConnection> onLaunch;
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@override
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Widget build(BuildContext context) {
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return new RaisedButton(
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onPressed: () { onLaunch(new ChildViewConnection(url: url)); },
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child: child
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);
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}
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}
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class Launcher extends StatelessWidget {
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Launcher({ Key key, this.items }) : super(key: key);
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final List<Widget> items;
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@override
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Widget build(BuildContext context) {
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return new ButtonBar(
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alignment: MainAxisAlignment.center,
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children: items
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);
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}
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}
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class WindowManager extends StatefulWidget {
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@override
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_WindowManagerState createState() => new _WindowManagerState();
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}
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class _WindowManagerState extends State<WindowManager> {
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List<ChildViewConnection> _windows = <ChildViewConnection>[];
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void _handleLaunch(ChildViewConnection child) {
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setState(() {
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_windows.add(child);
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});
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}
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void _handleClose(ChildViewConnection child) {
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setState(() {
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_windows.remove(child);
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});
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}
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@override
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Widget build(BuildContext context) {
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return new Material(
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child: new Stack(
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children: <Widget>[
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new Positioned(
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left: 0.0,
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right: 0.0,
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bottom: 0.0,
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child: new Launcher(items: _kLauncherData.map((LauncherData data) {
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return new LauncherItem(
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url: data.url,
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onLaunch: _handleLaunch,
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child: new Text(data.title)
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);
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}).toList())
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)
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]..addAll(_windows.map((ChildViewConnection child) {
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return new Window(
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key: new ObjectKey(child),
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onClose: _handleClose,
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child: child
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);
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}))
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)
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);
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}
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}
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void main() {
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runApp(new MaterialApp(
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title: 'Mozart',
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home: new WindowManager()
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));
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}
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@ -27,7 +27,6 @@ export 'src/rendering/auto_layout.dart';
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export 'src/rendering/binding.dart';
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export 'src/rendering/binding.dart';
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export 'src/rendering/block.dart';
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export 'src/rendering/block.dart';
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export 'src/rendering/box.dart';
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export 'src/rendering/box.dart';
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export 'src/rendering/child_view.dart';
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export 'src/rendering/custom_layout.dart';
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export 'src/rendering/custom_layout.dart';
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export 'src/rendering/debug.dart';
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export 'src/rendering/debug.dart';
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export 'src/rendering/editable_line.dart';
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export 'src/rendering/editable_line.dart';
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@ -1,336 +0,0 @@
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// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'dart:collection';
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import 'dart:ui' as ui;
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import 'package:flutter/services.dart';
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import 'package:flutter_services/mojo/gfx/composition/scene_token.dart' as mojom;
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import 'package:flutter_services/mojo/ui/view_containers.dart' as mojom;
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import 'package:flutter_services/mojo/ui/view_provider.dart' as mojom;
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import 'package:flutter_services/mojo/ui/view_properties.dart' as mojom;
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import 'package:flutter_services/mojo/ui/view_token.dart' as mojom;
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import 'package:flutter_services/mojo/ui/views.dart' as mojom;
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import 'package:flutter_services/mojo/geometry.dart' as mojom;
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import 'package:mojo/application.dart';
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import 'package:mojo/core.dart' as core;
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import 'package:mojo/mojo/service_provider.mojom.dart' as mojom;
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import 'box.dart';
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import 'object.dart';
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import 'layer.dart';
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mojom.ViewProxy _initViewProxy() {
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int viewHandle = ui.MojoServices.takeView();
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if (viewHandle == core.MojoHandle.INVALID)
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return null;
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return new mojom.ViewProxy.fromHandle(new core.MojoHandle(viewHandle));
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}
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// TODO(abarth): The view host is a unique resource. We should structure how we
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// take the handle from the engine so that multiple libraries can interact with
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// the view host safely. Unfortunately, the view host has a global namespace of
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// view keys, which means any scheme for sharing the view host also needs to
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// provide a mechanism for coordinating about view keys.
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final mojom.ViewProxy _viewProxy = _initViewProxy();
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final mojom.View _view = _viewProxy;
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mojom.ViewContainer _initViewContainer() {
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if (_view == null)
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return null;
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mojom.ViewContainerProxy viewContainerProxy = new mojom.ViewContainerProxy.unbound();
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_view.getContainer(viewContainerProxy);
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viewContainerProxy.setListener(new mojom.ViewContainerListenerStub.unbound()..impl = _ViewContainerListenerImpl.instance);
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return viewContainerProxy;
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}
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final mojom.ViewContainer _viewContainer = _initViewContainer();
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typedef dynamic _ResponseFactory();
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class _ViewContainerListenerImpl extends mojom.ViewContainerListener {
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static final _ViewContainerListenerImpl instance = new _ViewContainerListenerImpl();
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@override
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dynamic onChildAttached(int childKey, mojom.ViewInfo childViewInfo, [_ResponseFactory responseFactory = null]) {
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ChildViewConnection connection = _connections[childKey];
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connection?._onAttachedToContainer(childViewInfo);
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return responseFactory();
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}
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@override
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dynamic onChildUnavailable(int childKey, [_ResponseFactory responseFactory = null]) {
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ChildViewConnection connection = _connections[childKey];
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connection?._onUnavailable();
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return responseFactory();
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}
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final Map<int, ChildViewConnection> _connections = new HashMap<int, ChildViewConnection>();
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}
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/// (mojo-only) A connection with a child view.
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///
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/// Used with the [ChildView] widget to display a child view.
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class ChildViewConnection {
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/// Establishes a connection to the app at the given URL.
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ChildViewConnection({ String url }) {
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mojom.ViewProviderProxy viewProvider = shell.connectToApplicationService(
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url, mojom.ViewProvider.connectToService
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);
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mojom.ServiceProviderProxy incomingServices = new mojom.ServiceProviderProxy.unbound();
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_viewOwner = new mojom.ViewOwnerProxy.unbound();
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viewProvider.createView(_viewOwner, incomingServices);
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viewProvider.close();
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_connection = new ApplicationConnection(null, incomingServices);
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}
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/// Wraps an already-established connection to a child app.
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ChildViewConnection.fromViewOwner({
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mojom.ViewOwnerProxy viewOwner,
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ApplicationConnection connection
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}) : _connection = connection, _viewOwner = viewOwner;
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/// The underlying application connection to the child app.
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///
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/// Useful for requesting services from the child app and for providing
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/// services to the child app.
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ApplicationConnection get connection => _connection;
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ApplicationConnection _connection;
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mojom.ViewOwnerProxy _viewOwner;
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static int _nextViewKey = 1;
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int _viewKey;
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int _sceneVersion = 1;
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mojom.ViewProperties _currentViewProperties;
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VoidCallback _onViewInfoAvailable;
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mojom.ViewInfo _viewInfo;
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void _onAttachedToContainer(mojom.ViewInfo viewInfo) {
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assert(_viewInfo == null);
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_viewInfo = viewInfo;
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if (_onViewInfoAvailable != null)
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_onViewInfoAvailable();
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}
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void _onUnavailable() {
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_viewInfo = null;
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}
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void _addChildToViewHost() {
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assert(_attached);
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assert(_viewOwner != null);
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assert(_viewKey == null);
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assert(_viewInfo == null);
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_viewKey = _nextViewKey++;
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_viewContainer?.addChild(_viewKey, _viewOwner);
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_viewOwner = null;
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assert(!_ViewContainerListenerImpl.instance._connections.containsKey(_viewKey));
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_ViewContainerListenerImpl.instance._connections[_viewKey] = this;
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}
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void _removeChildFromViewHost() {
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assert(!_attached);
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assert(_viewOwner == null);
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assert(_viewKey != null);
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assert(_ViewContainerListenerImpl.instance._connections[_viewKey] == this);
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_ViewContainerListenerImpl.instance._connections.remove(_viewKey);
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_viewOwner = new mojom.ViewOwnerProxy.unbound();
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_viewContainer?.removeChild(_viewKey, _viewOwner);
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_viewKey = null;
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|
||||||
_viewInfo = null;
|
|
||||||
_currentViewProperties = null;
|
|
||||||
}
|
|
||||||
|
|
||||||
// The number of render objects attached to this view. In between frames, we
|
|
||||||
// might have more than one connected if we get added to a new render object
|
|
||||||
// before we get removed from the old render object. By the time we get around
|
|
||||||
// to computing our layout, we must be back to just having one render object.
|
|
||||||
int _attachments = 0;
|
|
||||||
bool get _attached => _attachments > 0;
|
|
||||||
|
|
||||||
void _attach() {
|
|
||||||
assert(_attachments >= 0);
|
|
||||||
++_attachments;
|
|
||||||
if (_viewKey == null)
|
|
||||||
_addChildToViewHost();
|
|
||||||
}
|
|
||||||
|
|
||||||
void _detach() {
|
|
||||||
assert(_attached);
|
|
||||||
--_attachments;
|
|
||||||
scheduleMicrotask(_removeChildFromViewHostIfNeeded);
|
|
||||||
}
|
|
||||||
|
|
||||||
void _removeChildFromViewHostIfNeeded() {
|
|
||||||
assert(_attachments >= 0);
|
|
||||||
if (_attachments == 0)
|
|
||||||
_removeChildFromViewHost();
|
|
||||||
}
|
|
||||||
|
|
||||||
mojom.ViewProperties _createViewProperties(int physicalWidth,
|
|
||||||
int physicalHeight,
|
|
||||||
double devicePixelRatio) {
|
|
||||||
if (_currentViewProperties != null &&
|
|
||||||
_currentViewProperties.displayMetrics.devicePixelRatio == devicePixelRatio &&
|
|
||||||
_currentViewProperties.viewLayout.size.width == physicalWidth &&
|
|
||||||
_currentViewProperties.viewLayout.size.height == physicalHeight)
|
|
||||||
return null;
|
|
||||||
|
|
||||||
mojom.DisplayMetrics displayMetrics = new mojom.DisplayMetrics()
|
|
||||||
..devicePixelRatio = devicePixelRatio;
|
|
||||||
mojom.Size size = new mojom.Size()
|
|
||||||
..width = physicalWidth
|
|
||||||
..height = physicalHeight;
|
|
||||||
mojom.ViewLayout viewLayout = new mojom.ViewLayout()
|
|
||||||
..size = size;
|
|
||||||
_currentViewProperties = new mojom.ViewProperties()
|
|
||||||
..displayMetrics = displayMetrics
|
|
||||||
..viewLayout = viewLayout;
|
|
||||||
return _currentViewProperties;
|
|
||||||
}
|
|
||||||
|
|
||||||
void _setChildProperties(int physicalWidth, int physicalHeight, double devicePixelRatio) {
|
|
||||||
assert(_attached);
|
|
||||||
assert(_attachments == 1);
|
|
||||||
assert(_viewKey != null);
|
|
||||||
if (_view == null)
|
|
||||||
return;
|
|
||||||
mojom.ViewProperties viewProperties = _createViewProperties(physicalWidth, physicalHeight, devicePixelRatio);
|
|
||||||
if (viewProperties == null)
|
|
||||||
return;
|
|
||||||
_viewContainer.setChildProperties(_viewKey, _sceneVersion++, viewProperties);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/// (mojo-only) A view of a child application.
|
|
||||||
class RenderChildView extends RenderBox {
|
|
||||||
/// Creates a child view render object.
|
|
||||||
///
|
|
||||||
/// The [scale] argument must not be null.
|
|
||||||
RenderChildView({
|
|
||||||
ChildViewConnection child,
|
|
||||||
double scale
|
|
||||||
}) : _scale = scale {
|
|
||||||
assert(scale != null);
|
|
||||||
this.child = child;
|
|
||||||
}
|
|
||||||
|
|
||||||
/// The child to display.
|
|
||||||
ChildViewConnection get child => _child;
|
|
||||||
ChildViewConnection _child;
|
|
||||||
set child (ChildViewConnection value) {
|
|
||||||
if (value == _child)
|
|
||||||
return;
|
|
||||||
if (attached && _child != null) {
|
|
||||||
_child._detach();
|
|
||||||
assert(_child._onViewInfoAvailable != null);
|
|
||||||
_child._onViewInfoAvailable = null;
|
|
||||||
}
|
|
||||||
_child = value;
|
|
||||||
if (attached && _child != null) {
|
|
||||||
_child._attach();
|
|
||||||
assert(_child._onViewInfoAvailable == null);
|
|
||||||
_child._onViewInfoAvailable = markNeedsPaint;
|
|
||||||
}
|
|
||||||
if (_child == null) {
|
|
||||||
markNeedsPaint();
|
|
||||||
} else {
|
|
||||||
markNeedsLayout();
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/// The device pixel ratio to provide the child.
|
|
||||||
double get scale => _scale;
|
|
||||||
double _scale;
|
|
||||||
set scale (double value) {
|
|
||||||
assert(value != null);
|
|
||||||
if (value == _scale)
|
|
||||||
return;
|
|
||||||
_scale = value;
|
|
||||||
if (_child != null)
|
|
||||||
markNeedsLayout();
|
|
||||||
}
|
|
||||||
|
|
||||||
@override
|
|
||||||
void attach(PipelineOwner owner) {
|
|
||||||
super.attach(owner);
|
|
||||||
if (_child != null) {
|
|
||||||
_child._attach();
|
|
||||||
assert(_child._onViewInfoAvailable == null);
|
|
||||||
_child._onViewInfoAvailable = markNeedsPaint;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
@override
|
|
||||||
void detach() {
|
|
||||||
if (_child != null) {
|
|
||||||
_child._detach();
|
|
||||||
assert(_child._onViewInfoAvailable != null);
|
|
||||||
_child._onViewInfoAvailable = null;
|
|
||||||
}
|
|
||||||
super.detach();
|
|
||||||
}
|
|
||||||
|
|
||||||
@override
|
|
||||||
bool get alwaysNeedsCompositing => true;
|
|
||||||
|
|
||||||
TextPainter _debugErrorMessage;
|
|
||||||
|
|
||||||
int _physicalWidth;
|
|
||||||
int _physicalHeight;
|
|
||||||
|
|
||||||
@override
|
|
||||||
void performLayout() {
|
|
||||||
size = constraints.biggest;
|
|
||||||
if (_child != null) {
|
|
||||||
_physicalWidth = (size.width * scale).round();
|
|
||||||
_physicalHeight = (size.height * scale).round();
|
|
||||||
_child._setChildProperties(_physicalWidth, _physicalHeight, scale);
|
|
||||||
assert(() {
|
|
||||||
if (_view == null) {
|
|
||||||
_debugErrorMessage ??= new TextPainter(
|
|
||||||
text: new TextSpan(text: 'Child views are supported only when running in Mojo shell.')
|
|
||||||
);
|
|
||||||
_debugErrorMessage.layout(minWidth: size.width, maxWidth: size.width);
|
|
||||||
}
|
|
||||||
return true;
|
|
||||||
});
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
@override
|
|
||||||
bool hitTestSelf(Point position) => true;
|
|
||||||
|
|
||||||
@override
|
|
||||||
void paint(PaintingContext context, Offset offset) {
|
|
||||||
assert(needsCompositing);
|
|
||||||
if (_child?._viewInfo != null) {
|
|
||||||
context.addLayer(new ChildSceneLayer(
|
|
||||||
offset: offset,
|
|
||||||
devicePixelRatio: scale,
|
|
||||||
physicalWidth: _physicalWidth,
|
|
||||||
physicalHeight: _physicalHeight,
|
|
||||||
sceneToken: _child._viewInfo.sceneToken.value
|
|
||||||
));
|
|
||||||
}
|
|
||||||
assert(() {
|
|
||||||
if (_view == null) {
|
|
||||||
context.canvas.drawRect(offset & size, new Paint()..color = const Color(0xFF0000FF));
|
|
||||||
_debugErrorMessage.paint(context.canvas, offset);
|
|
||||||
}
|
|
||||||
return true;
|
|
||||||
});
|
|
||||||
}
|
|
||||||
|
|
||||||
@override
|
|
||||||
void debugFillDescription(List<String> description) {
|
|
||||||
super.debugFillDescription(description);
|
|
||||||
description.add('child: $child');
|
|
||||||
description.add('scale: $scale');
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@ -1,52 +0,0 @@
|
|||||||
// Copyright 2016 The Chromium Authors. All rights reserved.
|
|
||||||
// Use of this source code is governed by a BSD-style license that can be
|
|
||||||
// found in the LICENSE file.
|
|
||||||
|
|
||||||
import 'package:flutter/rendering.dart';
|
|
||||||
|
|
||||||
import 'framework.dart';
|
|
||||||
import 'media_query.dart';
|
|
||||||
|
|
||||||
export 'package:flutter/rendering.dart' show ChildViewConnection;
|
|
||||||
|
|
||||||
/// (mojo-only) A widget that is replaced by content from another process.
|
|
||||||
///
|
|
||||||
/// Requires a [MediaQuery] ancestor to provide appropriate media information to
|
|
||||||
/// the child.
|
|
||||||
class ChildView extends StatelessWidget {
|
|
||||||
/// Creates a widget that is replaced by content from another process.
|
|
||||||
ChildView({ Key key, this.child }) : super(key: key);
|
|
||||||
|
|
||||||
/// A connection to the child whose content will replace this widget.
|
|
||||||
final ChildViewConnection child;
|
|
||||||
|
|
||||||
@override
|
|
||||||
Widget build(BuildContext context) {
|
|
||||||
return new _ChildViewWidget(
|
|
||||||
child: child,
|
|
||||||
scale: MediaQuery.of(context).devicePixelRatio
|
|
||||||
);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
class _ChildViewWidget extends LeafRenderObjectWidget {
|
|
||||||
_ChildViewWidget({
|
|
||||||
ChildViewConnection child,
|
|
||||||
this.scale
|
|
||||||
}) : child = child, super(key: new GlobalObjectKey(child)) {
|
|
||||||
assert(scale != null);
|
|
||||||
}
|
|
||||||
|
|
||||||
final ChildViewConnection child;
|
|
||||||
final double scale;
|
|
||||||
|
|
||||||
@override
|
|
||||||
RenderChildView createRenderObject(BuildContext context) => new RenderChildView(child: child, scale: scale);
|
|
||||||
|
|
||||||
@override
|
|
||||||
void updateRenderObject(BuildContext context, RenderChildView renderObject) {
|
|
||||||
renderObject
|
|
||||||
..child = child
|
|
||||||
..scale = scale;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@ -15,7 +15,6 @@ export 'src/widgets/auto_layout.dart';
|
|||||||
export 'src/widgets/banner.dart';
|
export 'src/widgets/banner.dart';
|
||||||
export 'src/widgets/basic.dart';
|
export 'src/widgets/basic.dart';
|
||||||
export 'src/widgets/binding.dart';
|
export 'src/widgets/binding.dart';
|
||||||
export 'src/widgets/child_view.dart';
|
|
||||||
export 'src/widgets/clamp_overscrolls.dart';
|
export 'src/widgets/clamp_overscrolls.dart';
|
||||||
export 'src/widgets/container.dart';
|
export 'src/widgets/container.dart';
|
||||||
export 'src/widgets/debug.dart';
|
export 'src/widgets/debug.dart';
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user