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590 行
22 KiB

using System;
using System.Collections.Generic;
using System.Diagnostics;
using Unity.UIWidgets.async2;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.scheduler2;
using Unity.UIWidgets.ui;
using UnityEngine;
using Color = Unity.UIWidgets.ui.Color;
using Rect = Unity.UIWidgets.ui.Rect;
namespace Unity.UIWidgets.widgets {
public class ImageUtils {
public static ImageConfiguration createLocalImageConfiguration(BuildContext context, Size size = null) {
return new ImageConfiguration(
DefaultAssetBundle.of(context: context),
MediaQuery.of(context: context, true)?.devicePixelRatio ?? 1.0f,
Localizations.localeOf(context: context, true),
size: size,
platform: Application.platform
);
}
public static Future precacheImage(
ImageProvider provider,
BuildContext context,
Size size = null,
ImageErrorListener onError = null
) {
var config = createLocalImageConfiguration(context: context, size: size);
var completer = Completer.create();
var stream = provider.resolve(configuration: config);
ImageStreamListener listener = null;
listener = new ImageStreamListener(
(image, sync) => {
if (!completer.isCompleted) {
completer.complete();
}
SchedulerBinding.instance.addPostFrameCallback(timeStamp => {
stream.removeListener(listener: listener);
});
},
onError: error => {
if (!completer.isCompleted) {
completer.complete();
}
stream.removeListener(listener: listener);
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
context: new ErrorDescription("image failed to precache"),
library: "image resource service",
silent: true));
}
);
stream.addListener(listener: listener);
return completer.future;
}
}
public delegate Widget ImageFrameBuilder(
BuildContext context,
Widget child,
int frame,
bool wasSynchronouslyLoaded
);
public delegate Widget ImageLoadingBuilder(
BuildContext context,
Widget child,
ImageChunkEvent loadingProgress
);
public delegate Widget ImageErrorWidgetBuilder(
BuildContext context,
object error,
StackTrace stackTrace
);
public class Image : StatefulWidget {
public readonly AlignmentGeometry alignment;
public readonly Rect centerSlice;
public readonly Color color;
public readonly BlendMode colorBlendMode;
public readonly ImageErrorWidgetBuilder errorBuilder;
public readonly FilterQuality filterQuality;
public readonly BoxFit? fit;
public readonly ImageFrameBuilder frameBuilder;
public readonly bool gaplessPlayback;
public readonly float? height;
public readonly ImageProvider image;
public readonly ImageLoadingBuilder loadingBuilder;
public readonly bool matchTextDirection;
public readonly ImageRepeat repeat;
public readonly float? width;
public Image(
Key key = null,
ImageProvider image = null,
ImageFrameBuilder frameBuilder = null,
ImageLoadingBuilder loadingBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float? width = null,
float? height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit? fit = null,
AlignmentGeometry alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool matchTextDirection = false,
bool gaplessPlayback = false,
FilterQuality filterQuality = FilterQuality.low
) : base(key: key) {
D.assert(image != null);
this.image = image;
this.frameBuilder = frameBuilder;
this.loadingBuilder = loadingBuilder;
this.errorBuilder = errorBuilder;
this.width = width;
this.height = height;
this.color = color;
this.colorBlendMode = colorBlendMode;
this.fit = fit;
this.alignment = alignment ?? Alignment.center;
this.repeat = repeat;
this.centerSlice = centerSlice;
this.gaplessPlayback = gaplessPlayback;
this.filterQuality = filterQuality;
this.matchTextDirection = matchTextDirection;
}
public static Image network(
string src,
Key key = null,
float scale = 1.0f,
ImageFrameBuilder frameBuilder = null,
ImageLoadingBuilder loadingBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float? width = null,
float? height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit? fit = null,
AlignmentGeometry alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool gaplessPlayback = false,
bool matchTextDirection = false,
FilterQuality filterQuality = FilterQuality.low,
IDictionary<string, string> headers = null,
int? cacheWidth = null,
int? cacheHeight = null
) {
var image = ResizeImage.resizeIfNeeded(cacheWidth: cacheWidth, cacheHeight: cacheHeight,
new NetworkImage(url: src, scale: scale, headers: headers));
return new Image(
key: key,
image: image,
frameBuilder: frameBuilder,
loadingBuilder: loadingBuilder,
errorBuilder: errorBuilder,
width: width,
height: height,
color: color,
colorBlendMode: colorBlendMode,
fit: fit,
alignment: alignment,
repeat: repeat,
centerSlice: centerSlice,
matchTextDirection: matchTextDirection,
gaplessPlayback: gaplessPlayback,
filterQuality: filterQuality
);
}
public static Image file(
string file,
Key key = null,
float scale = 1.0f,
ImageFrameBuilder frameBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float? width = null,
float? height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit? fit = null,
AlignmentGeometry alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
bool matchTextDirection = false,
Rect centerSlice = null,
bool gaplessPlayback = false,
FilterQuality filterQuality = FilterQuality.low,
int? cacheWidth = null,
int? cacheHeight = null
) {
var fileImage = ResizeImage.resizeIfNeeded(cacheWidth: cacheWidth, cacheHeight: cacheHeight,
new FileImage(file: file, scale: scale));
return new Image(
key: key,
image: fileImage,
frameBuilder: frameBuilder,
null,
errorBuilder: errorBuilder,
width: width,
height: height,
color: color,
colorBlendMode: colorBlendMode,
fit: fit,
alignment: alignment,
repeat: repeat,
centerSlice: centerSlice,
matchTextDirection: matchTextDirection,
gaplessPlayback: gaplessPlayback,
filterQuality: filterQuality
);
}
public static Image asset(
string name,
Key key = null,
AssetBundle bundle = null,
ImageFrameBuilder frameBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float? scale = null,
float? width = null,
float? height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit? fit = null,
Alignment alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool matchTextDirection = false,
bool gaplessPlayback = false,
string package = null,
FilterQuality filterQuality = FilterQuality.low,
int? cacheWidth = default,
int? cacheHeight = null
) {
var _scale = scale ?? 1.0f;
var _image = scale != null
? (AssetBundleImageProvider) new ExactAssetImage(assetName: name, bundle: bundle, scale: _scale)
: new AssetImage(assetName: name, bundle: bundle);
var _Image = ResizeImage.resizeIfNeeded(cacheWidth: cacheWidth, cacheHeight: cacheHeight, provider: _image);
return new Image(
key: key,
image: _Image,
frameBuilder: frameBuilder,
null,
errorBuilder: errorBuilder,
width: width,
height: height,
color: color,
colorBlendMode: colorBlendMode,
fit: fit,
alignment: alignment,
repeat: repeat,
centerSlice: centerSlice,
matchTextDirection: matchTextDirection,
gaplessPlayback: gaplessPlayback,
filterQuality: filterQuality
);
}
public static Image memory(
byte[] bytes,
Key key = null,
float scale = 1.0f,
ImageFrameBuilder frameBuilder = null,
ImageErrorWidgetBuilder errorBuilder = null,
float? width = null,
float? height = null,
Color color = null,
BlendMode colorBlendMode = BlendMode.srcIn,
BoxFit? fit = null,
Alignment alignment = null,
ImageRepeat repeat = ImageRepeat.noRepeat,
Rect centerSlice = null,
bool matchTextDirection = false,
bool gaplessPlayback = false,
FilterQuality filterQuality = FilterQuality.low,
int? cacheWidth = default,
int? cacheHeight = null
) {
// ResizeImage.resizeIfNeeded(cacheWidth, cacheHeight, MemoryImage(bytes, scale: scale));
var memoryImage = new MemoryImage(bytes: bytes, scale: scale);
return new Image(
key: key,
ResizeImage.resizeIfNeeded(cacheWidth: cacheWidth, cacheHeight: cacheHeight,
new MemoryImage(bytes: bytes, scale: scale)),
frameBuilder: frameBuilder,
null,
errorBuilder: errorBuilder,
width: width,
height: height,
color: color,
colorBlendMode: colorBlendMode,
fit: fit,
alignment: alignment,
repeat: repeat,
centerSlice: centerSlice,
matchTextDirection: matchTextDirection,
gaplessPlayback: gaplessPlayback,
filterQuality: filterQuality
);
}
public override State createState() {
return new _ImageState();
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties: properties);
properties.add(new DiagnosticsProperty<ImageProvider>("image", value: image));
properties.add(new DiagnosticsProperty<ImageFrameBuilder>("frameBuilder", value: frameBuilder));
properties.add(new DiagnosticsProperty<ImageLoadingBuilder>("loadingBuilder", value: loadingBuilder));
properties.add(new FloatProperty("width", value: width, defaultValue: foundation_.kNullDefaultValue));
properties.add(new FloatProperty("height", value: height, defaultValue: foundation_.kNullDefaultValue));
properties.add(new ColorProperty("color", value: color,
defaultValue: foundation_.kNullDefaultValue));
properties.add(new EnumProperty<BlendMode>("colorBlendMode", value: colorBlendMode,
defaultValue: foundation_.kNullDefaultValue));
properties.add(new EnumProperty<BoxFit?>("fit", value: fit, defaultValue: foundation_.kNullDefaultValue));
properties.add(new DiagnosticsProperty<AlignmentGeometry>("alignment", value: alignment,
defaultValue: foundation_.kNullDefaultValue));
properties.add(new EnumProperty<ImageRepeat>("repeat", value: repeat, defaultValue: ImageRepeat.noRepeat));
properties.add(new DiagnosticsProperty<Rect>("centerSlice", value: centerSlice,
defaultValue: foundation_.kNullDefaultValue));
properties.add(new EnumProperty<FilterQuality>("filterQuality", value: filterQuality,
defaultValue: foundation_.kNullDefaultValue));
properties.add(new FlagProperty("matchTextDirection", value: matchTextDirection, "match text direction"));
}
}
public class _ImageState : State<Image>, WidgetsBindingObserver {
int _frameNumber;
ImageInfo _imageInfo;
ImageStream _imageStream;
bool _invertColors;
bool _isListeningToStream;
object _lastException;
StackTrace _lastStack;
ImageChunkEvent _loadingProgress;
DisposableBuildContext<State<Image>> _scrollAwareContext;
bool _wasSynchronouslyLoaded;
public void didChangeAccessibilityFeatures() {
setState(() => { _updateInvertColors(); });
}
public void didChangeMetrics() {
setState();
}
public void didChangeTextScaleFactor() {
setState();
}
public void didChangePlatformBrightness() {
setState();
}
public void didChangeLocales(List<Locale> locale) {
setState();
}
public Future<bool> didPopRoute() {
return Future.value(false).to<bool>();
}
public Future<bool> didPushRoute(string route) {
return Future.value(false).to<bool>();
}
public override void initState() {
base.initState();
WidgetsBinding.instance.addObserver(this);
_scrollAwareContext = new DisposableBuildContext<State<Image>>(this);
}
public override void dispose() {
D.assert(_imageStream != null);
WidgetsBinding.instance.removeObserver(this);
_stopListeningToStream();
_scrollAwareContext.dispose();
base.dispose();
}
public override void didChangeDependencies() {
_updateInvertColors();
_resolveImage();
if (TickerMode.of(context: context)) {
_listenToStream();
}
else {
_stopListeningToStream();
}
base.didChangeDependencies();
}
public override void didUpdateWidget(StatefulWidget oldWidget) {
base.didUpdateWidget(oldWidget: oldWidget);
var image = (Image) oldWidget;
if (_isListeningToStream &&
widget.loadingBuilder == null != (image.loadingBuilder == null)) {
_imageStream.removeListener(_getListener(loadingBuilder: image.loadingBuilder));
_imageStream.addListener(_getListener());
}
if (widget.image != ((Image) oldWidget).image) {
_resolveImage();
}
}
public override void reassemble() {
_resolveImage(); // in case the image cache was flushed
base.reassemble();
}
void _updateInvertColors() {
_invertColors = MediaQuery.of(context: context, true)?.invertColors
?? false;
}
void _resolveImage() {
//TODO: why refactoring this code? we need a PR to fix it!
/*ScrollAwareImageProvider<object> provider = new ScrollAwareImageProvider<object>(
context: _scrollAwareContext,
imageProvider: widget.image);*/
var newStream =
widget.image.resolve(ImageUtils.createLocalImageConfiguration(
context: context,
widget.width != null && widget.height != null
? new Size(width: widget.width.Value, height: widget.height.Value)
: null
));
D.assert(newStream != null);
_updateSourceStream(newStream: newStream);
}
void _onError(Exception error) {
setState(() => {
_lastException = error;
// _lastStack = stackTrace;
});
}
ImageStreamListener _getListener(ImageLoadingBuilder loadingBuilder = null) {
loadingBuilder = loadingBuilder ?? widget.loadingBuilder;
_lastException = null;
_lastStack = null;
ImageChunkListener onChunk = null;
if (loadingBuilder == null) {
onChunk = _handleImageChunk;
}
ImageErrorListener onError = null;
if (widget.errorBuilder != null) {
onError = error => {
setState(() => {
_lastException = error;
// _lastStack = stackTrace;
});
};
}
return new ImageStreamListener(
onImage: _handleImageFrame,
onChunk: onChunk,
onError: onError
);
}
void _handleImageFrame(ImageInfo imageInfo, bool synchronousCall) {
setState(() => {
_imageInfo = imageInfo;
_loadingProgress = null;
_frameNumber = _frameNumber == null ? 0 : _frameNumber + 1;
_wasSynchronouslyLoaded |= synchronousCall;
});
}
void _handleImageChunk(ImageChunkEvent _event) {
D.assert(widget.loadingBuilder != null);
setState(() => { _loadingProgress = _event; });
}
void _handleImageChanged(ImageInfo imageInfo, bool synchronousCall) {
setState(() => { _imageInfo = imageInfo; });
}
void _updateSourceStream(ImageStream newStream) {
if (_imageStream?.key == newStream?.key) {
return;
}
if (_isListeningToStream) {
_imageStream.removeListener(_getListener());
}
if (!widget.gaplessPlayback) {
setState(() => { _imageInfo = null; });
}
setState(() => {
_loadingProgress = null;
_frameNumber = 0;
_wasSynchronouslyLoaded = false;
});
_imageStream = newStream;
if (_isListeningToStream) {
_imageStream.addListener(_getListener());
}
}
void _listenToStream() {
if (_isListeningToStream) {
return;
}
_imageStream.addListener(_getListener());
_isListeningToStream = true;
}
void _stopListeningToStream() {
if (!_isListeningToStream) {
return;
}
_imageStream.removeListener(_getListener());
_isListeningToStream = false;
}
public override Widget build(BuildContext context) {
if (_lastException != null) {
D.assert(widget.errorBuilder != null);
return widget.errorBuilder(context: context, error: _lastException, stackTrace: _lastStack);
}
Widget image = new RawImage(
image: _imageInfo?.image,
width: widget.width,
height: widget.height,
scale: _imageInfo?.scale ?? 1.0f,
color: widget.color,
colorBlendMode: widget.colorBlendMode,
fit: widget.fit,
alignment: widget.alignment,
repeat: widget.repeat,
centerSlice: widget.centerSlice,
matchTextDirection: widget.matchTextDirection,
invertColors: _invertColors,
filterQuality: widget.filterQuality
);
if (widget.frameBuilder != null) {
image = widget.frameBuilder(context: context, child: image, frame: _frameNumber,
wasSynchronouslyLoaded: _wasSynchronouslyLoaded);
}
if (widget.loadingBuilder != null) {
image = widget.loadingBuilder(context: context, child: image, loadingProgress: _loadingProgress);
}
return image;
}
public override void debugFillProperties(DiagnosticPropertiesBuilder description) {
base.debugFillProperties(properties: description);
description.add(new DiagnosticsProperty<ImageStream>("stream", value: _imageStream));
description.add(new DiagnosticsProperty<ImageInfo>("pixels", value: _imageInfo));
description.add(new DiagnosticsProperty<ImageChunkEvent>("loadingProgress", value: _loadingProgress));
description.add(new DiagnosticsProperty<int>("frameNumber", value: _frameNumber));
description.add(new DiagnosticsProperty<bool>("wasSynchronouslyLoaded", value: _wasSynchronouslyLoaded));
}
}
}