513 lines
17 KiB
Dart
513 lines
17 KiB
Dart
// 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 'dart:async';
|
|
//import 'dart:developer' show Timeline, Flow;
|
|
import 'dart:developer' as dev;
|
|
import 'dart:io' show Platform;
|
|
|
|
import 'package:flutter/foundation.dart';
|
|
import 'package:flutter/scheduler.dart';
|
|
import 'package:flutter/widgets.dart' hide Flow;
|
|
import 'package:flutter/material.dart';
|
|
|
|
/// A [ListTile] that shows an about box.
|
|
///
|
|
/// This widget is often added to an app's [Drawer]. When tapped it shows
|
|
/// an about box dialog with [showAboutDialog].
|
|
///
|
|
/// The about box will include a button that shows licenses for software used by
|
|
/// the application. The licenses shown are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
///
|
|
/// If your application does not have a [Drawer], you should provide an
|
|
/// affordance to call [showAboutDialog] or (at least) [showLicensePage].
|
|
class AboutListTile extends StatelessWidget {
|
|
/// Creates a list tile for showing an about box.
|
|
///
|
|
/// The arguments are all optional. The application name, if omitted, will be
|
|
/// derived from the nearest [Title] widget. The version, icon, and legalese
|
|
/// values default to the empty string.
|
|
const AboutListTile({
|
|
Key key,
|
|
this.icon = const Icon(null),
|
|
this.child,
|
|
this.applicationName,
|
|
this.applicationVersion,
|
|
this.applicationIcon,
|
|
this.applicationLegalese,
|
|
this.aboutBoxChildren,
|
|
}) : super(key: key);
|
|
|
|
/// The icon to show for this drawer item.
|
|
///
|
|
/// By default no icon is shown.
|
|
///
|
|
/// This is not necessarily the same as the image shown in the dialog box
|
|
/// itself; which is controlled by the [applicationIcon] property.
|
|
final Widget icon;
|
|
|
|
/// The label to show on this drawer item.
|
|
///
|
|
/// Defaults to a text widget that says "About Foo" where "Foo" is the
|
|
/// application name specified by [applicationName].
|
|
final Widget child;
|
|
|
|
/// The name of the application.
|
|
///
|
|
/// This string is used in the default label for this drawer item (see
|
|
/// [child]) and as the caption of the [AboutDialog] that is shown.
|
|
///
|
|
/// Defaults to the value of [Title.title], if a [Title] widget can be found.
|
|
/// Otherwise, defaults to [Platform.resolvedExecutable].
|
|
final String applicationName;
|
|
|
|
/// The version of this build of the application.
|
|
///
|
|
/// This string is shown under the application name in the [AboutDialog].
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationVersion;
|
|
|
|
/// The icon to show next to the application name in the [AboutDialog].
|
|
///
|
|
/// By default no icon is shown.
|
|
///
|
|
/// Typically this will be an [ImageIcon] widget. It should honor the
|
|
/// [IconTheme]'s [IconThemeData.size].
|
|
///
|
|
/// This is not necessarily the same as the icon shown on the drawer item
|
|
/// itself, which is controlled by the [icon] property.
|
|
final Widget applicationIcon;
|
|
|
|
/// A string to show in small print in the [AboutDialog].
|
|
///
|
|
/// Typically this is a copyright notice.
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationLegalese;
|
|
|
|
/// Widgets to add to the [AboutDialog] after the name, version, and legalese.
|
|
///
|
|
/// This could include a link to a Web site, some descriptive text, credits,
|
|
/// or other information to show in the about box.
|
|
///
|
|
/// Defaults to nothing.
|
|
final List<Widget> aboutBoxChildren;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
assert(debugCheckHasMaterial(context));
|
|
assert(debugCheckHasMaterialLocalizations(context));
|
|
return ListTile(
|
|
leading: icon,
|
|
title: child ??
|
|
Text(MaterialLocalizations.of(context).aboutListTileTitle(applicationName ?? _defaultApplicationName(context))),
|
|
onTap: () {
|
|
showAboutDialog(
|
|
context: context,
|
|
applicationName: applicationName,
|
|
applicationVersion: applicationVersion,
|
|
applicationIcon: applicationIcon,
|
|
applicationLegalese: applicationLegalese,
|
|
children: aboutBoxChildren,
|
|
);
|
|
},
|
|
);
|
|
}
|
|
}
|
|
|
|
/// Displays an [AboutDialog], which describes the application and provides a
|
|
/// button to show licenses for software used by the application.
|
|
///
|
|
/// The arguments correspond to the properties on [AboutDialog].
|
|
///
|
|
/// If the application has a [Drawer], consider using [AboutListTile] instead
|
|
/// of calling this directly.
|
|
///
|
|
/// If you do not need an about box in your application, you should at least
|
|
/// provide an affordance to call [showLicensePage].
|
|
///
|
|
/// The licenses shown on the [LicensePage] are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
///
|
|
/// The `context` argument is passed to [showDialog], the documentation for
|
|
/// which discusses how it is used.
|
|
void showAboutDialog({
|
|
@required BuildContext context,
|
|
String applicationName,
|
|
String applicationVersion,
|
|
Widget applicationIcon,
|
|
String applicationLegalese,
|
|
List<Widget> children,
|
|
}) {
|
|
assert(context != null);
|
|
showDialog<void>(
|
|
context: context,
|
|
builder: (BuildContext context) {
|
|
return AboutDialog(
|
|
applicationName: applicationName,
|
|
applicationVersion: applicationVersion,
|
|
applicationIcon: applicationIcon,
|
|
applicationLegalese: applicationLegalese,
|
|
children: children,
|
|
);
|
|
},
|
|
);
|
|
}
|
|
|
|
/// Displays a [LicensePage], which shows licenses for software used by the
|
|
/// application.
|
|
///
|
|
/// The arguments correspond to the properties on [LicensePage].
|
|
///
|
|
/// If the application has a [Drawer], consider using [AboutListTile] instead
|
|
/// of calling this directly.
|
|
///
|
|
/// The [AboutDialog] shown by [showAboutDialog] includes a button that calls
|
|
/// [showLicensePage].
|
|
///
|
|
/// The licenses shown on the [LicensePage] are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
void showLicensePage({
|
|
@required BuildContext context,
|
|
String applicationName,
|
|
String applicationVersion,
|
|
Widget applicationIcon,
|
|
String applicationLegalese,
|
|
}) {
|
|
assert(context != null);
|
|
Navigator.push(context, MaterialPageRoute<void>(
|
|
builder: (BuildContext context) => LicensePage(
|
|
applicationName: applicationName,
|
|
applicationVersion: applicationVersion,
|
|
applicationLegalese: applicationLegalese,
|
|
)
|
|
));
|
|
}
|
|
|
|
/// An about box. This is a dialog box with the application's icon, name,
|
|
/// version number, and copyright, plus a button to show licenses for software
|
|
/// used by the application.
|
|
///
|
|
/// To show an [AboutDialog], use [showAboutDialog].
|
|
///
|
|
/// If the application has a [Drawer], the [AboutListTile] widget can make the
|
|
/// process of showing an about dialog simpler.
|
|
///
|
|
/// The [AboutDialog] shown by [showAboutDialog] includes a button that calls
|
|
/// [showLicensePage].
|
|
///
|
|
/// The licenses shown on the [LicensePage] are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
class AboutDialog extends StatelessWidget {
|
|
/// Creates an about box.
|
|
///
|
|
/// The arguments are all optional. The application name, if omitted, will be
|
|
/// derived from the nearest [Title] widget. The version, icon, and legalese
|
|
/// values default to the empty string.
|
|
const AboutDialog({
|
|
Key key,
|
|
this.applicationName,
|
|
this.applicationVersion,
|
|
this.applicationIcon,
|
|
this.applicationLegalese,
|
|
this.children,
|
|
}) : super(key: key);
|
|
|
|
/// The name of the application.
|
|
///
|
|
/// Defaults to the value of [Title.title], if a [Title] widget can be found.
|
|
/// Otherwise, defaults to [Platform.resolvedExecutable].
|
|
final String applicationName;
|
|
|
|
/// The version of this build of the application.
|
|
///
|
|
/// This string is shown under the application name.
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationVersion;
|
|
|
|
/// The icon to show next to the application name.
|
|
///
|
|
/// By default no icon is shown.
|
|
///
|
|
/// Typically this will be an [ImageIcon] widget. It should honor the
|
|
/// [IconTheme]'s [IconThemeData.size].
|
|
final Widget applicationIcon;
|
|
|
|
/// A string to show in small print.
|
|
///
|
|
/// Typically this is a copyright notice.
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationLegalese;
|
|
|
|
/// Widgets to add to the dialog box after the name, version, and legalese.
|
|
///
|
|
/// This could include a link to a Web site, some descriptive text, credits,
|
|
/// or other information to show in the about box.
|
|
///
|
|
/// Defaults to nothing.
|
|
final List<Widget> children;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
assert(debugCheckHasMaterialLocalizations(context));
|
|
final String name = applicationName ?? _defaultApplicationName(context);
|
|
final String version = applicationVersion ?? _defaultApplicationVersion(context);
|
|
final Widget icon = applicationIcon ?? _defaultApplicationIcon(context);
|
|
List<Widget> body = <Widget>[];
|
|
if (icon != null)
|
|
body.add(IconTheme(data: const IconThemeData(size: 45.0), child: icon));
|
|
body.add(Expanded(
|
|
child: Padding(
|
|
padding: const EdgeInsets.symmetric(horizontal: 24.0),
|
|
|
|
child: ListBody(
|
|
children: <Widget>[
|
|
Container(
|
|
padding: EdgeInsets.only(top: 10),
|
|
child: Text(name, style: Theme.of(context).textTheme.title),
|
|
),
|
|
Text(version, style: Theme.of(context).textTheme.body1),
|
|
Text(applicationLegalese ?? '', style: Theme.of(context).textTheme.caption),
|
|
],
|
|
),
|
|
),
|
|
));
|
|
body = <Widget>[
|
|
Row(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: body,
|
|
),
|
|
];
|
|
if (children != null)
|
|
body.addAll(children);
|
|
return AlertDialog(
|
|
content: SingleChildScrollView(
|
|
child: ListBody(children: body),
|
|
),
|
|
actions: <Widget>[
|
|
FlatButton(
|
|
child: Text(MaterialLocalizations.of(context).viewLicensesButtonLabel),
|
|
onPressed: () {
|
|
showLicensePage(
|
|
context: context,
|
|
applicationName: applicationName,
|
|
applicationVersion: applicationVersion,
|
|
applicationIcon: applicationIcon,
|
|
applicationLegalese: applicationLegalese,
|
|
);
|
|
},
|
|
),
|
|
FlatButton(
|
|
child: Text(MaterialLocalizations.of(context).closeButtonLabel),
|
|
onPressed: () {
|
|
Navigator.pop(context);
|
|
},
|
|
),
|
|
],
|
|
);
|
|
}
|
|
}
|
|
|
|
/// A page that shows licenses for software used by the application.
|
|
///
|
|
/// To show a [LicensePage], use [showLicensePage].
|
|
///
|
|
/// The [AboutDialog] shown by [showAboutDialog] and [AboutListTile] includes
|
|
/// a button that calls [showLicensePage].
|
|
///
|
|
/// The licenses shown on the [LicensePage] are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
class LicensePage extends StatefulWidget {
|
|
/// Creates a page that shows licenses for software used by the application.
|
|
///
|
|
/// The arguments are all optional. The application name, if omitted, will be
|
|
/// derived from the nearest [Title] widget. The version and legalese values
|
|
/// default to the empty string.
|
|
///
|
|
/// The licenses shown on the [LicensePage] are those returned by the
|
|
/// [LicenseRegistry] API, which can be used to add more licenses to the list.
|
|
const LicensePage({
|
|
Key key,
|
|
this.applicationName,
|
|
this.applicationVersion,
|
|
this.applicationLegalese,
|
|
}) : super(key: key);
|
|
|
|
/// The name of the application.
|
|
///
|
|
/// Defaults to the value of [Title.title], if a [Title] widget can be found.
|
|
/// Otherwise, defaults to [Platform.resolvedExecutable].
|
|
final String applicationName;
|
|
|
|
/// The version of this build of the application.
|
|
///
|
|
/// This string is shown under the application name.
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationVersion;
|
|
|
|
/// A string to show in small print.
|
|
///
|
|
/// Typically this is a copyright notice.
|
|
///
|
|
/// Defaults to the empty string.
|
|
final String applicationLegalese;
|
|
|
|
@override
|
|
_LicensePageState createState() => _LicensePageState();
|
|
}
|
|
|
|
class _LicensePageState extends State<LicensePage> {
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
_initLicenses();
|
|
}
|
|
|
|
final List<Widget> _licenses = <Widget>[];
|
|
bool _loaded = false;
|
|
|
|
Future<void> _initLicenses() async {
|
|
int debugFlowId = -1;
|
|
assert(() {
|
|
final dev.Flow flow = dev.Flow.begin();
|
|
dev.Timeline.timeSync('_initLicenses()', () { }, flow: flow);
|
|
debugFlowId = flow.id;
|
|
return true;
|
|
}());
|
|
await for (LicenseEntry license in LicenseRegistry.licenses) {
|
|
if (!mounted) {
|
|
return;
|
|
}
|
|
assert(() {
|
|
dev.Timeline.timeSync('_initLicenses()', () { }, flow: dev.Flow.step(debugFlowId));
|
|
return true;
|
|
}());
|
|
final List<LicenseParagraph> paragraphs =
|
|
await SchedulerBinding.instance.scheduleTask<List<LicenseParagraph>>(
|
|
license.paragraphs.toList,
|
|
Priority.animation,
|
|
debugLabel: 'License',
|
|
);
|
|
setState(() {
|
|
_licenses.add(const Padding(
|
|
padding: EdgeInsets.symmetric(vertical: 18.0),
|
|
child: Text(
|
|
'🍀', // That's U+1F340. Could also use U+2766 (❦) if U+1F340 doesn't work everywhere.
|
|
textAlign: TextAlign.center,
|
|
),
|
|
));
|
|
_licenses.add(Container(
|
|
decoration: const BoxDecoration(
|
|
border: Border(bottom: BorderSide(width: 0.0))
|
|
),
|
|
child: Text(
|
|
license.packages.join(', '),
|
|
style: const TextStyle(fontWeight: FontWeight.bold),
|
|
textAlign: TextAlign.center,
|
|
),
|
|
));
|
|
for (LicenseParagraph paragraph in paragraphs) {
|
|
if (paragraph.indent == LicenseParagraph.centeredIndent) {
|
|
_licenses.add(Padding(
|
|
padding: const EdgeInsets.only(top: 16.0),
|
|
child: Text(
|
|
paragraph.text,
|
|
style: const TextStyle(fontWeight: FontWeight.bold),
|
|
textAlign: TextAlign.center,
|
|
),
|
|
));
|
|
} else {
|
|
assert(paragraph.indent >= 0);
|
|
_licenses.add(Padding(
|
|
padding: EdgeInsetsDirectional.only(top: 8.0, start: 16.0 * paragraph.indent),
|
|
child: Text(paragraph.text),
|
|
));
|
|
}
|
|
}
|
|
});
|
|
}
|
|
setState(() {
|
|
_loaded = true;
|
|
});
|
|
assert(() {
|
|
dev.Timeline.timeSync('Build scheduled', () { }, flow: dev.Flow.end(debugFlowId));
|
|
return true;
|
|
}());
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
assert(debugCheckHasMaterialLocalizations(context));
|
|
final String name = widget.applicationName ?? _defaultApplicationName(context);
|
|
final String version = widget.applicationVersion ?? _defaultApplicationVersion(context);
|
|
final MaterialLocalizations localizations = MaterialLocalizations.of(context);
|
|
final List<Widget> contents = <Widget>[
|
|
Text(name, style: Theme.of(context).textTheme.headline, textAlign: TextAlign.center),
|
|
Text(version, style: Theme.of(context).textTheme.body1, textAlign: TextAlign.center),
|
|
Container(height: 18.0),
|
|
Text(widget.applicationLegalese ?? '', style: Theme.of(context).textTheme.caption, textAlign: TextAlign.center),
|
|
Container(height: 18.0),
|
|
Text('Powered by Flutter', style: Theme.of(context).textTheme.body1, textAlign: TextAlign.center),
|
|
Container(height: 24.0),
|
|
];
|
|
contents.addAll(_licenses);
|
|
if (!_loaded) {
|
|
contents.add(const Padding(
|
|
padding: EdgeInsets.symmetric(vertical: 24.0),
|
|
child: Center(
|
|
child: CircularProgressIndicator(),
|
|
),
|
|
));
|
|
}
|
|
return Scaffold(
|
|
appBar: AppBar(
|
|
title: Text(localizations.licensesPageTitle),
|
|
),
|
|
// All of the licenses page text is English. We don't want localized text
|
|
// or text direction.
|
|
body: Localizations.override(
|
|
locale: const Locale('en', 'US'),
|
|
context: context,
|
|
child: DefaultTextStyle(
|
|
style: Theme.of(context).textTheme.caption,
|
|
child: SafeArea(
|
|
bottom: false,
|
|
child: Scrollbar(
|
|
child: ListView(
|
|
padding: const EdgeInsets.symmetric(horizontal: 8.0, vertical: 12.0),
|
|
children: contents,
|
|
),
|
|
),
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
String _defaultApplicationName(BuildContext context) {
|
|
// This doesn't handle the case of the application's title dynamically
|
|
// changing. In theory, we should make Title expose the current application
|
|
// title using an InheritedWidget, and so forth. However, in practice, if
|
|
// someone really wants their application title to change dynamically, they
|
|
// can provide an explicit applicationName to the widgets defined in this
|
|
// file, instead of relying on the default.
|
|
final Title ancestorTitle = context.ancestorWidgetOfExactType(Title);
|
|
return ancestorTitle?.title ?? Platform.resolvedExecutable.split(Platform.pathSeparator).last;
|
|
}
|
|
|
|
String _defaultApplicationVersion(BuildContext context) {
|
|
// TODO(ianh): Get this from the embedder somehow.
|
|
return '';
|
|
}
|
|
|
|
Widget _defaultApplicationIcon(BuildContext context) {
|
|
// TODO(ianh): Get this from the embedder somehow.
|
|
return null;
|
|
}
|