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Move AutomaticKeepAliveClientWithTickerProviderStateMixin to 

automatic_keep_alive.cs
/main
Yuncong Zhang 6 年前
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cc9cb636
共有 3 个文件被更改，包括 117 次插入 和 117 次删除
  1. 117
      Runtime/widgets/automatic_keep_alive.cs
  2. 115
      Runtime/widgets/dismissible.cs
  3. 2
      Runtime/widgets/ticker_provider.cs

117
Runtime/widgets/automatic_keep_alive.cs
查看文件


}
}
// There is a copy of the implementation of this mixin at widgets/dismissble.cs,
// There is a copy of the implementation of this mixin
KeepAliveHandle _keepAliveHandle;
void _ensureKeepAlive() {
D.assert(this._keepAliveHandle == null);
this._keepAliveHandle = new KeepAliveHandle();
new KeepAliveNotification(this._keepAliveHandle).dispatch(this.context);
}
void _releaseKeepAlive() {
this._keepAliveHandle.release();
this._keepAliveHandle = null;
}
protected abstract bool wantKeepAlive { get; }
protected void updateKeepAlive() {
if (this.wantKeepAlive) {
if (this._keepAliveHandle == null) {
this._ensureKeepAlive();
}
}
else {
if (this._keepAliveHandle != null) {
this._releaseKeepAlive();
}
}
}
public override void initState() {
base.initState();
if (this.wantKeepAlive) {
this._ensureKeepAlive();
}
}
public override void deactivate() {
if (this._keepAliveHandle != null) {
this._releaseKeepAlive();
}
base.deactivate();
}
public override Widget build(BuildContext context) {
if (this.wantKeepAlive && this._keepAliveHandle == null) {
this._ensureKeepAlive();
}
return null;
}
}
public abstract class AutomaticKeepAliveClientWithTickerProviderStateMixin<T> : State<T>, TickerProvider
where T : StatefulWidget {
HashSet<Ticker> _tickers;
public Ticker createTicker(TickerCallback onTick) {
this._tickers = this._tickers ?? new HashSet<Ticker>();
var result = new _AutomaticWidgetTicker<T>(onTick, this, debugLabel: "created by " + this);
this._tickers.Add(result);
return result;
}
internal void _removeTicker(_AutomaticWidgetTicker<T> ticker) {
D.assert(this._tickers != null);
D.assert(this._tickers.Contains(ticker));
this._tickers.Remove(ticker);
}
public override void dispose() {
D.assert(() => {
if (this._tickers != null) {
foreach (Ticker ticker in this._tickers) {
if (ticker.isActive) {
throw new UIWidgetsError(
this + " was disposed with an active Ticker.\n" +
this.GetType() +
" created a Ticker via its TickerProviderStateMixin, but at the time " +
"dispose() was called on the mixin, that Ticker was still active. All Tickers must " +
"be disposed before calling super.dispose(). Tickers used by AnimationControllers " +
"should be disposed by calling dispose() on the AnimationController itself. " +
"Otherwise, the ticker will leak.\n" +
"The offending ticker was: " + ticker.toString(debugIncludeStack: true)
);
}
}
}
return true;
});
base.dispose();
}
public override void didChangeDependencies() {
bool muted = !TickerMode.of(this.context);
if (this._tickers != null) {
foreach (Ticker ticker in this._tickers) {
ticker.muted = muted;
}
}
base.didChangeDependencies();
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<HashSet<Ticker>>(
"tickers",
this._tickers,
description: this._tickers != null ? "tracking " + this._tickers.Count + " tickers" : null,
defaultValue: Diagnostics.kNullDefaultValue
));
}
KeepAliveHandle _keepAliveHandle;
void _ensureKeepAlive() {

115
Runtime/widgets/dismissible.cs
查看文件


}
}
public abstract class AutomaticKeepAliveClientWithTickerProviderStateMixin<T> : State<T>, TickerProvider
where T : StatefulWidget {
HashSet<Ticker> _tickers;
public Ticker createTicker(TickerCallback onTick) {
this._tickers = this._tickers ?? new HashSet<Ticker>();
var result = new _AutomaticWidgetTicker<T>(onTick, this, debugLabel: "created by " + this);
this._tickers.Add(result);
return result;
}
internal void _removeTicker(_AutomaticWidgetTicker<T> ticker) {
D.assert(this._tickers != null);
D.assert(this._tickers.Contains(ticker));
this._tickers.Remove(ticker);
}
public override void dispose() {
D.assert(() => {
if (this._tickers != null) {
foreach (Ticker ticker in this._tickers) {
if (ticker.isActive) {
throw new UIWidgetsError(
this + " was disposed with an active Ticker.\n" +
this.GetType() +
" created a Ticker via its TickerProviderStateMixin, but at the time " +
"dispose() was called on the mixin, that Ticker was still active. All Tickers must " +
"be disposed before calling super.dispose(). Tickers used by AnimationControllers " +
"should be disposed by calling dispose() on the AnimationController itself. " +
"Otherwise, the ticker will leak.\n" +
"The offending ticker was: " + ticker.toString(debugIncludeStack: true)
);
}
}
}
return true;
});
base.dispose();
}
public override void didChangeDependencies() {
bool muted = !TickerMode.of(this.context);
if (this._tickers != null) {
foreach (Ticker ticker in this._tickers) {
ticker.muted = muted;
}
}
base.didChangeDependencies();
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<HashSet<Ticker>>(
"tickers",
this._tickers,
description: this._tickers != null ? "tracking " + this._tickers.Count + " tickers" : null,
defaultValue: Diagnostics.kNullDefaultValue
));
}
KeepAliveHandle _keepAliveHandle;
void _ensureKeepAlive() {
D.assert(this._keepAliveHandle == null);
this._keepAliveHandle = new KeepAliveHandle();
new KeepAliveNotification(this._keepAliveHandle).dispatch(this.context);
}
void _releaseKeepAlive() {
this._keepAliveHandle.release();
this._keepAliveHandle = null;
}
protected abstract bool wantKeepAlive { get; }
protected void updateKeepAlive() {
if (this.wantKeepAlive) {
if (this._keepAliveHandle == null) {
this._ensureKeepAlive();
}
}
else {
if (this._keepAliveHandle != null) {
this._releaseKeepAlive();
}
}
}
public override void initState() {
base.initState();
if (this.wantKeepAlive) {
this._ensureKeepAlive();
}
}
public override void deactivate() {
if (this._keepAliveHandle != null) {
this._releaseKeepAlive();
}
base.deactivate();
}
public override Widget build(BuildContext context) {
if (this.wantKeepAlive && this._keepAliveHandle == null) {
this._ensureKeepAlive();
}
return null;
}
}
class _AutomaticWidgetTicker<T> : Ticker where T : StatefulWidget {
internal _AutomaticWidgetTicker(
TickerCallback onTick,

2
Runtime/widgets/ticker_provider.cs
查看文件


}
}
// There is a copy of the implementation of this mixin at widgets/dismissble.cs,
// There is a copy of the implementation of this mixin at widgets/automatic_keep_alive.cs,
// in AutomaticKeepAliveClientWithTickerProviderStateMixin, remember to keep the copy up to date
public abstract class TickerProviderStateMixin<T> : State<T>, TickerProvider where T : StatefulWidget {
HashSet<Ticker> _tickers;

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