Merge branch 'skia' of github.com:Unity-Technologies/com.unity.uiwidgets into merge_latest_skia_changes

# Conflicts:
#	Samples/UIWidgetsSamples_2019_4/Assets/Script/TextTest.cs
#	com.unity.uiwidgets/Runtime/foundation/assertions.cs
#	com.unity.uiwidgets/Runtime/painting/binding.cs
#	com.unity.uiwidgets/Runtime/painting/image_provider.cs
#	com.unity.uiwidgets/Runtime/widgets/framework.cs
#	com.unity.uiwidgets/Runtime/widgets/table.cs

com.unity.uiwidgets/Editor/UIWidgetsPanelEditor.cs

             EditorGUILayout.PropertyField(pixelRatioProperty);
             EditorGUILayout.PropertyField(antiAliasingProperty);
             UIWidgetsPanel panel = (UIWidgetsPanel)target;
-
-            if (GUILayout.Button("Take Screenshot")) {
-                panel.TakeScreenshot();
-            }
+            
             serializedObject.ApplyModifiedProperties(); 
         }
     }

com.unity.uiwidgets/Runtime/async2/future.cs

                     future.then((object value) => {
                         remaining--;
                         if (values != null) {
-                            values[pos] = (T) value;
+                            values.Insert(pos, (T)value);
                             if (remaining == 0) {
                                 result._completeWithValue(values);
                             }

com.unity.uiwidgets/Runtime/async2/timer.cs

             }
         }
 
+        const long MILLI_TO_NANO = 1000000L;
+        
-            UIMonoState_postTaskForTime(_postTaskForTime, (IntPtr) callabackHandle, _wakeupTime * 1000L);
+            UIMonoState_postTaskForTime(_postTaskForTime, (IntPtr) callabackHandle, _wakeupTime * MILLI_TO_NANO);
         }
 
         [MonoPInvokeCallback(typeof(UIMonoState_postTaskForTimeCallback))]

com.unity.uiwidgets/Runtime/engine2/UIWidgetsPanel.cs

 namespace Unity.UIWidgets.engine2 {
     public partial class UIWidgetsPanel : RawImage {
         [Serializable]
-        public struct TextFont {
-            public string family;
-            [SerializeField] public Font[] fonts;
-        }
-
-        [Serializable]
+        }
+        
+        [Serializable]
+        public struct TextFont {
+            public string family;
+            [SerializeField] public Font[] fonts;
         }
 
         public TextFont[] fonts;
 
             _ptr = UIWidgetsPanel_constructor((IntPtr) _handle, UIWidgetsPanel_entrypoint);
             var settings = new Dictionary<string, object>();
-            settings.Add("fonts", fontsToObject(fonts));
+            if (fonts != null && fonts.Length > 0) {
+                settings.Add("fonts", fontsToObject(fonts));
+            }
+            NativeConsole.OnEnable();
         }
 
         protected virtual void main() {
             _isEntered = false;
             UIWidgetsPanel_onMouseLeave(_ptr);
         }
-
-        public void TakeScreenshot() {
-            UIWidgetsPanel_takeScreenShot(_ptr);
-        }
-
+        
         public void OnDrag(PointerEventData eventData) {
             var pos = _getPointerPosition(Input.mousePosition);
             if (pos == null) {
 
         [DllImport(NativeBindings.dllName)]
         static extern void UIWidgetsPanel_onMouseLeave(IntPtr ptr);
-
-        [DllImport(NativeBindings.dllName)]
-        static extern void UIWidgetsPanel_takeScreenShot(IntPtr ptr);
     }
 }

com.unity.uiwidgets/Runtime/painting/edge_insets.cs

 
         public EdgeInsets clamp(EdgeInsets min, EdgeInsets max) {
             return fromLTRB(
-                left.clamp(min.left, min.left),
-                top.clamp(min.top, min.top),
-                right.clamp(min.right, min.right),
-                bottom.clamp(min.bottom, min.bottom)
+                left.clamp(min.left, max.left),
+                top.clamp(min.top, max.top),
+                right.clamp(min.right, max.right),
+                bottom.clamp(min.bottom, max.bottom)
             );
         }
         

com.unity.uiwidgets/Runtime/painting/image_provider.cs

 using Image = Unity.UIWidgets.ui.Image;
 using Locale = Unity.UIWidgets.ui.Locale;
 using Object = UnityEngine.Object;
+using Path = System.IO.Path;
 using TextDirection = Unity.UIWidgets.ui.TextDirection;
 using Window = Unity.UIWidgets.ui.Window;
 
                     resolveStreamForKey(configuration, stream, successKey, (Exception e) => errorHandler(e));
                 },
                 (T key, Exception exception) => {
-                    // await null; // wait an event turn in case a listener has been added to the image stream.
-                    _ErrorImageCompleter imageCompleter = new _ErrorImageCompleter();
-                    stream.setCompleter(imageCompleter);
-                    InformationCollector collector = null;
-                    D.assert(() => {
-                        IEnumerable<DiagnosticsNode> infoCollector() {
-                            yield return new DiagnosticsProperty<ImageProvider>("Image provider", this);
-                            yield return new DiagnosticsProperty<ImageConfiguration>("Image configuration",
-                                configuration);
-                            yield return new DiagnosticsProperty<T>("Image key", key, defaultValue: null);
-                        }
+                    Timer.run(() => {
+                        _ErrorImageCompleter imageCompleter = new _ErrorImageCompleter();
+                        stream.setCompleter(imageCompleter);
+                        InformationCollector collector = null;
+                        D.assert(() => {
+                            IEnumerable<DiagnosticsNode> infoCollector() {
+                                yield return new DiagnosticsProperty<ImageProvider>("Image provider", this);
+                                yield return new DiagnosticsProperty<ImageConfiguration>("Image configuration",
+                                    configuration);
+                                yield return new DiagnosticsProperty<T>("Image key", key, defaultValue: null);
+                            }
-                        collector = infoCollector;
-                        return true;
+                            collector = infoCollector;
+                            return true;
+                        });
+                        imageCompleter.setError(
+                            exception: exception,
+                            stack: exception.StackTrace,
+                            context: new ErrorDescription("while resolving an image"),
+                            silent: true, // could be a network error or whatnot
+                            informationCollector: collector
+                        );
+                        return null;
-                    imageCompleter.setError(
-                        exception: exception,
-                        stack: exception.StackTrace,
-                        context: new ErrorDescription("while resolving an image"),
-                        silent: true, // could be a network error or whatnot
-                        informationCollector: collector
-                    );
-                    return Future.value();
+                   return null;
                 }
             );
 
         void resolveStreamForKey(ImageConfiguration configuration, ImageStream stream, T key,
             ImageErrorListener handleError) {
-            // This is an unusual edge case where someone has told us that they found
-            // the image we want before getting to this method. We should avoid calling
-            // load again, but still update the image cache with LRU information.
+            
             if (stream.completer != null) {
                 ImageStreamCompleter completerEdge = PaintingBinding.instance.imageCache.putIfAbsent(
                     key,
                 didError = true;
             };
 
-            // If an error is added to a synchronous completer before a listener has been
-            // added, it can throw an error both into the zone and up the stack. Thus, it
-            // looks like the error has been caught, but it is in fact also bubbling to the
-            // zone. Since we cannot prevent all usage of Completer.sync here, or rather
-            // that changing them would be too breaking, we instead hook into the same
-            // zone mechanism to intercept the uncaught error and deliver it to the
-            // image stream's error handler. Note that these errors may be duplicated,
-            // hence the need for the `didError` flag.
             Zone dangerZone = Zone.current.fork(
                 specification: new ZoneSpecification(
                     handleUncaughtError: (Zone self, ZoneDelegate parent, Zone zone, Exception error) => {
         }
 
         Future<Codec> _loadAsync(FileImage key, DecoderCallback decode) {
-            byte[] bytes = File.ReadAllBytes("Assets/StreamingAssets/" + key.file);
+            byte[] bytes = File.ReadAllBytes(Path.Combine(Application.streamingAssetsPath, key.file));
             if (bytes != null && bytes.Length > 0 ) {
                 return decode(bytes);
             }

com.unity.uiwidgets/Runtime/painting/text_painter.cs

 using System.Collections.Generic;
-using System.Linq;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.service;
 using Unity.UIWidgets.ui;
         }
 
         void setPlaceholderDimensions(List<PlaceholderDimensions> value) {
-            if (value == null || value.isEmpty() || value.SequenceEqual(_placeholderDimensions)) {
+            if (value == null || value.isEmpty() || value.equalsList(_placeholderDimensions)) {
                 return;
             }
 

com.unity.uiwidgets/Runtime/rendering/proxy_box.cs

         public void rotateX(float degrees) {
             _transform.rotateX(degrees);
             markNeedsPaint();
-            //2D, do nothing
-            //2D, do nothing
         }
 
         public void rotateZ(float degrees) {

com.unity.uiwidgets/Runtime/ui2/window.cs

 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.ui;
 using UnityEngine;
+using UnityEngine.UI;
 
 namespace Unity.UIWidgets.ui {
     public delegate void VoidCallback();
             }
         }
 
+        protected float queryDevicePixelRatio() {
+            return _panel.devicePixelRatioOverride;
+        }
+        
-            D.assert(false, () => "window.windowPosToScreenPos is not implemented yet!");
-            return offset;
+            Camera camera = null;
+            var canvas = _panel.canvas;
+            if (canvas.renderMode != RenderMode.ScreenSpaceCamera) {
+                camera = canvas.GetComponent<GraphicRaycaster>().eventCamera;
+            }
+
+            var pos = new Vector2(offset.dx, offset.dy);
+            pos = pos * queryDevicePixelRatio() / _panel.canvas.scaleFactor;
+            var rectTransform = _panel.rectTransform;
+            var rect = rectTransform.rect;
+            pos.x += rect.min.x;
+            pos.y = rect.max.y - pos.y;
+            var worldPos = rectTransform.TransformPoint(new Vector2(pos.x, pos.y));
+            var screenPos = RectTransformUtility.WorldToScreenPoint(camera, worldPos);
+            return new Offset(screenPos.x, Screen.height - screenPos.y);
         }
 
         public void run(Action callback) {

com.unity.uiwidgets/Runtime/widgets/binding.cs

             base.initInstances();
             instance = this;
 
-            // D.assert(() => {
-            //     _debugAddStackFilters();
-            //     return true;
-            // }());
+            D.assert(() => {
+                // _debugAddStackFilters();
+                return true;
+            });
 
             _buildOwner = new BuildOwner();
             buildOwner.onBuildScheduled = _handleBuildScheduled;

com.unity.uiwidgets/Runtime/widgets/framework.cs

         static Widget _defaultErrorWidgetBuilder(UIWidgetsErrorDetails details) {
             string message = "";
             D.assert(() => {
-                message = _stringify(details.exception) + "\nSee also: https://flutter.dev/docs/testing/errors";
+                message = _stringify(details.exception);
                 return true;
             });
             object exception = details.exception;
         readonly UIWidgetsError _uiWidgetsError;
 
         public override RenderObject createRenderObject(BuildContext context) {
-            //return null;
             return new RenderErrorBox(message);
         }
 

engine/.gitignore

 artifacts
 build
 obj
-*.gen.*
+*.gen.*
+third_party/skia

engine/Build.bee.cs

                 "src/shell/platform/unity/unity_surface_manager.h",
                 "src/shell/platform/unity/win32_task_runner.cc",
                 "src/shell/platform/unity/win32_task_runner.h",
+                "src/shell/platform/unity/unity_console.cc",
+                "src/shell/platform/unity/unity_console.h",
 
                 "src/shell/version/version.cc",
                 "src/shell/version/version.h",

engine/README.md

 Add ${PWD}/depot_tools to PATH
 
 2. Clone the skia Repo
-
+```
+```
 
 3. Install LLVM
 
-
+
 Update out/Debug/args.gn with the following content:
 ```
 clang_win = "C:\Program Files\LLVM"
 ## How to Build Engine
 ```
 bee
-```
+```

engine/src/shell/platform/unity/uiwidgets_panel.cc

   }
 }
 
-void UIWidgetsPanel::TakeScreenShot() {
-  if (process_events_) {
-    auto* engine = reinterpret_cast<EmbedderEngine*>(engine_);
-    Rasterizer::Screenshot screenshot = engine->GetShell().Screenshot(
-        Rasterizer::ScreenshotType::SkiaPicture, true);
-    const char* screenshot_char =
-        static_cast<const char*>(screenshot.data->data());
-    int size = screenshot.data->size();
-    SkBase64 temp;
-    temp.decode(screenshot_char, screenshot.data->size());
-    char* decoded = temp.getData();
-
-    std::ofstream myfile;
-    myfile.open("example.txt");
-    myfile.write(decoded, temp.getDataSize());
-    myfile.close();
-  }
-}
-
 UIWIDGETS_API(UIWidgetsPanel*)
 UIWidgetsPanel_constructor(
     Mono_Handle handle,
 
 UIWIDGETS_API(void)
 UIWidgetsPanel_onMouseLeave(UIWidgetsPanel* panel) { panel->OnMouseLeave(); }
-
-UIWIDGETS_API(void)
-UIWidgetsPanel_takeScreenShot(UIWidgetsPanel* panel) {
-  panel->TakeScreenShot();
-}
 }  // namespace uiwidgets

engine/src/shell/platform/unity/uiwidgets_panel.h

   ~UIWidgetsPanel();
 
   void OnEnable(void* native_texture_ptr, size_t width, size_t height,
-                float device_pixel_ratio, const char* streaming_assets_path, const char* settings);
+                float device_pixel_ratio, const char* streaming_assets_path,
+                const char* settings);
 
   void MonoEntrypoint();
 
 
   void OnMouseLeave();
 
-  void TakeScreenShot();
  private:
   UIWidgetsPanel(Mono_Handle handle, EntrypointCallback entrypoint_callback);
 

Samples/UIWidgetsSamples_2019_4/Assets/Scene/TextTest.unity

   m_Component:
   - component: {fileID: 847097469}
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+  - component: {fileID: 847097470}
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+--- !u!114 &847097470
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+  m_Script: {fileID: 11500000, guid: b7e1083a82b756840b36958a76a3e6f3, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
   m_Material: {fileID: 0}
     width: 1
     height: 1
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-  - family: racher
-    fonts:
-    - asset: Ranchers-Regular.ttf
-      weight: 0
-  - family: roboto
-    fonts:
-    - asset: Roboto-Italic.ttf
-      weight: 0
-    - asset: Roboto-BlackItalic.ttf
-      weight: 900
-  - family: robotox
-    fonts:
-    - asset: Roboto-Italic.ttf
-      weight: 0
+--- !u!222 &847097471
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Samples/UIWidgetsSamples_2019_4/Assets/Scene.meta

+fileFormatVersion: 2
+guid: e18dd30e208165141b608bdabb7d8599
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
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Samples/UIWidgetsSamples_2019_4/Assets/Script.meta

+fileFormatVersion: 2
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+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
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com.unity.uiwidgets/Runtime/engine2/native_console.cs

+using UnityEngine;
+using AOT;
+using System;
+using System.Runtime.InteropServices;
+using NativeBindings = Unity.UIWidgets.ui.NativeBindings;
+
+public static class NativeConsole {
+    internal delegate void LogDelegate(IntPtr message, int iSize);
+
+    [DllImport(NativeBindings.dllName)]
+    internal static extern void InitNativeConsoleDelegate(LogDelegate log);
+
+    [MonoPInvokeCallback(typeof(LogDelegate))]
+    internal static void LogMessageFromCpp(IntPtr message, int iSize) {
+        Debug.Log(Marshal.PtrToStringAnsi(message, iSize));
+    }
+
+    public static void OnEnable()
+    {
+        InitNativeConsoleDelegate(LogMessageFromCpp);
+    }
+}

engine/src/shell/platform/unity/unity_console.cc

+#include "unity_console.h"
+#include <stdarg.h>
+
+namespace uiwidgets {
+
+ void UnityConsole::WriteLine(const char* fmt, ...) {
+  char log_str[512] = { 0 };
+  va_list ap;
+  va_start(ap, fmt);
+  vsprintf(log_str, fmt, ap);
+  _log(log_str, strlen(log_str));
+  va_end(ap);
+}
+
+LogDelegate UnityConsole::_log;
+
+UIWIDGETS_API(void) 
+InitNativeConsoleDelegate(LogDelegate Log) { 
+  UnityConsole::_log = Log; 
+}
+
+}

engine/src/shell/platform/unity/unity_console.h

+#pragma once
+#include "runtime/mono_api.h"
+
+namespace uiwidgets {
+
+typedef void (*LogDelegate)(char* message, int iSize);
+
+
+class UnityConsole{
+ public:
+  static LogDelegate _log;
+
+   /**
+   output the log to unity editor console window
+    @param fmt   log format
+    @param ...   log args
+    @return      null
+
+    example: 
+      UnityConsole::WriteLine("output log without fmt param");
+      UnityConsole::WriteLine("%s: %d + %d = %d","output log with param", 1, 2, 3);
+   */
+  static void WriteLine(const char* fmt, ...);
+};
+
+} // namespace uiwidgets

Samples/UIWidgetsSamples_2019_4/Assets/Scene/CountTest.unity

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Samples/UIWidgetsSamples_2019_4/Assets/Scene/ImageTest.unity.meta

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+  externalObjects: {}
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Samples/UIWidgetsSamples_2019_4/Assets/Script/CountTest.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.engine2;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using FontStyle = Unity.UIWidgets.ui.FontStyle;
+using Image = Unity.UIWidgets.widgets.Image;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+using ui_ = Unity.UIWidgets.widgets.ui_;
+
+namespace UIWidgetsSample
+{
+    public class CountTest : UIWidgetsPanel
+    {
+        protected void OnEnable()
+        {
+            base.OnEnable();
+        }
+
+        protected override void main()
+        {
+            ui_.runApp(new MyApp());
+        }
+
+        class MyApp : StatelessWidget
+        {
+            public override Widget build(BuildContext context)
+            {
+                return new WidgetsApp(
+                    home: new ExampleApp(),
+                    pageRouteBuilder: (settings, builder) =>
+                        new PageRouteBuilder(
+                            settings: settings,
+                            pageBuilder: (Buildcontext, animation, secondaryAnimation) => builder(context)
+                        )
+                );
+            }
+        }
+
+        class ExampleApp : StatefulWidget
+        {
+            public ExampleApp(Key key = null) : base(key)
+            {
+            }
+
+            public override State createState()
+            {
+                return new ExampleState();
+            }
+        }
+
+        class ExampleState : State<ExampleApp>
+        {
+            int counter;
+            
+            public override Widget build(BuildContext context)
+            {
+                return new Container(
+                    color: Color.black,
+                    child: new Column(
+                        children: new List<Widget>
+                        {
+                            new Text("Counter: " + counter,
+                                style: new TextStyle(fontSize: 18, fontWeight: FontWeight.w100)),
+
+                            new GestureDetector(
+                                onTap: () =>
+                                {
+                                    setState(() =>
+                                    {
+                                        counter++;
+                                    });
+                                },
+                                child: new Container(
+                                    padding: EdgeInsets.symmetric(20, 20),
+                                    color: counter % 2 == 0 ? Color.white : Color.black,
+                                    child: new Text("Click Me",
+                                        style: new TextStyle(fontFamily: "racher", fontWeight: FontWeight.w100))
+                                )
+                            )
+                        }
+                    )
+                );
+            }
+        }
+    }
+}

Samples/UIWidgetsSamples_2019_4/Assets/Script/ImageTest.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.engine2;
+using Unity.UIWidgets.foundation;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using FontStyle = Unity.UIWidgets.ui.FontStyle;
+using Image = Unity.UIWidgets.widgets.Image;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+using ui_ = Unity.UIWidgets.widgets.ui_;
+
+namespace UIWidgetsSample
+{
+    public class ImageTest : UIWidgetsPanel
+    {
+        protected void OnEnable()
+        {
+            base.OnEnable();
+        }
+
+        protected override void main()
+        {
+            ui_.runApp(new MyApp());
+        }
+
+        class MyApp : StatelessWidget
+        {
+            public override Widget build(BuildContext context)
+            {
+                return new WidgetsApp(
+                    home: new ExampleApp(),
+                    pageRouteBuilder: (settings, builder) =>
+                        new PageRouteBuilder(
+                            settings: settings,
+                            pageBuilder: (Buildcontext, animation, secondaryAnimation) => builder(context)
+                        )
+                );
+            }
+        }
+
+        class ExampleApp : StatefulWidget
+        {
+            public ExampleApp(Key key = null) : base(key)
+            {
+            }
+
+            public override State createState()
+            {
+                return new ExampleState();
+            }
+        }
+
+        class ExampleState : State<ExampleApp>
+        {
+            private float frame = 0;
+
+            public override Widget build(BuildContext context)
+            {
+                return new Container(
+                    color: Color.black,
+                    child: new Column(
+                        children: new List<Widget>
+                        {
+                            AnimatedLottie.file("wine.json", frame: frame, curve: Curves.linear),
+                            new Container(
+                                width: 100,
+                                height: 100,
+                                decoration: new BoxDecoration(
+                                    borderRadius: BorderRadius.all(Radius.circular(8))
+                                ),
+                                child: Image.file("test.gif", gaplessPlayback: true)
+                            ),
+                            new Container(
+                                width: 200,
+                                height: 100,
+                                decoration: new BoxDecoration(
+                                    borderRadius: BorderRadius.all(Radius.circular(8))
+                                ),
+                                child: Image.network(
+                                    "https://unity-cn-cms-prd-1254078910.cos.ap-shanghai.myqcloud.com/assetstore-cms-media/img-7dfe215f-0075-4f9c-9b5a-be5ee88b866b",
+                                    gaplessPlayback: true)
+                            ),
+                            new GestureDetector(
+                                onTap: () => { setState(() => { frame += 1; }); },
+                                child: new Container(
+                                    padding: EdgeInsets.symmetric(20, 20),
+                                    color: Color.white,
+                                    child: new Text("Click Me",
+                                        style: new TextStyle(fontWeight: FontWeight.w100))
+                                )
+                            )
+                        }
+                    )
+                );
+            }
+        }
+    }
+}

Samples/UIWidgetsSamples_2019_4/Assets/Script/ImageTest.cs.meta

+fileFormatVersion: 2
+guid: f34989adbb4345fda4362c56f72ae791
+timeCreated: 1607399515

Samples/UIWidgetsSamples_2019_4/Assets/Script/TextTest.cs

+using System.Collections.Generic;
+using Unity.UIWidgets.animation;
+using Unity.UIWidgets.engine2;
+using Unity.UIWidgets.foundation;
+//using Unity.UIWidgets.material;
+using Unity.UIWidgets.painting;
+using Unity.UIWidgets.ui;
+using Unity.UIWidgets.widgets;
+using FontStyle = Unity.UIWidgets.ui.FontStyle;
+using Image = Unity.UIWidgets.widgets.Image;
+using TextStyle = Unity.UIWidgets.painting.TextStyle;
+using ui_ = Unity.UIWidgets.widgets.ui_;
+using Unity.UIWidgets.cupertino;
+using Unity.UIWidgets.rendering;
+//using UIWidgetsGallery.gallery;
+using Unity.UIWidgets.service;
+using Brightness = Unity.UIWidgets.ui.Brightness;
+using UnityEngine;
+using System;
+using UIWidgetsGallery.gallery;
+using Color = Unity.UIWidgets.ui.Color;
+using Random = UnityEngine.Random;
+
+namespace UIWidgetsSample
+{
+    public class UIWidgetsExample : UIWidgetsPanel
+    {
+        protected void OnEnable()
+        {
+            base.OnEnable();
+        }
+
+        protected override void main()
+        {
+            ui_.runApp(new MyApp());
+        }
+
+        class MyApp : StatelessWidget
+        {
+            public override Widget build(BuildContext context)
+            {
+                return new CupertinoApp(
+                    home: new HomeScreen()
+                );
+
+            }
+        }
+
+
+
+        class HomeScreen : StatelessWidget
+        {
+            public override Widget build(BuildContext context)
+            {
+                // return new CupertinoPageScaffold(
+                //     child: new Center(
+                //         child: new CupertinoButton(
+                //             child: new Text(
+                //                 "THIS IS TAB #"
+                //             ),
+                //             onPressed: () =>
+                //             {
+                //                 Navigator.of(context).push(
+                //                     new CupertinoPageRoute(builder: (contex3) =>
+                //                     {
+                //                         return
+                //                             new CupertinoAlertDemo();
+                //                     })
+                //                 );
+                //             }
+                //         )
+                //         //new Text("hello world!", style: CupertinoTheme.of(context).textTheme.navTitleTextStyle)
+                //     )
+                //     //backgroundColor: Colors.brown
+                // );
+
+                List<BottomNavigationBarItem> items = new List<BottomNavigationBarItem>();
+                items.Add(new BottomNavigationBarItem(
+                    icon: new Icon(CupertinoIcons.bell),
+                    title: new Text("views")
+                ));
+                items.Add(new BottomNavigationBarItem(
+                    icon: new Icon(CupertinoIcons.eye_solid),
+                    title: new Text("articles")
+                ));
+                return new CupertinoTabScaffold(
+                    tabBar: new CupertinoTabBar(
+                        items: items
+                    ),
+                    tabBuilder: ((contex, index) =>
+                    {
+                        //return new Center(child: new Text("hello"));
+                        return new CupertinoTabView(
+                            builder: (contex1) =>
+                            {
+                                return new CupertinoPageScaffold(
+                                    navigationBar: new CupertinoNavigationBar(
+                                        middle: (index == 0) ? new Text("views") : new Text("articles")
+                                    ),
+                                    child: new Center(
+                                        
+                                        child: new CupertinoButton(
+                                            child: new Text(
+                                                "THIS IS TAB #",
+                                                style: CupertinoTheme.of(contex1)
+                                                    .textTheme
+                                                    .navTitleTextStyle
+                                                //.copyWith(fontSize:32)
+                                            ),
+
+                                            onPressed: () =>
+                                            {
+                                                Navigator.of(contex1).push(
+                                                    new CupertinoPageRoute(builder: (contex3) =>
+                                                    {
+                                                        return
+                                                            new CupertinoAlertDemo(); //DetailScreen1(index == 0 ? "views" : "articles");
+                                                    })
+                                                );
+                                            }
+                                        )
+                                    )
+                                );
+                            }
+                        );
+                    })
+
+                );
+
+
+            }
+        }
+        
+        
+
+        public class DetailScreen1 : StatelessWidget
+        {
+            public DetailScreen1(string topic)
+            {
+                this.topic = topic;
+
+            }
+
+            public string topic;
+
+            public override Widget build(BuildContext context)
+            {
+                return new CupertinoPageScaffold(
+                    navigationBar: new CupertinoNavigationBar(
+                        //middle: new Text("Details")
+                    ),
+                    child: new Center(
+                        child: new Text("hello world")
+                    )
+                );
+            }
+        }
+
+              
+    }
+
+    
+}

Samples/UIWidgetsSamples_2019_4/Assets/Script/TextTest.cs.meta

+fileFormatVersion: 2
+guid: b7e1083a82b756840b36958a76a3e6f3
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Samples/UIWidgetsSamples_2019_4/Assets/StreamingAssets/confetti.json.meta

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Samples/UIWidgetsSamples_2019_4/Assets/UIWidgetsExample.cs

-using System.Collections.Generic;
-using Unity.UIWidgets.animation;
-using Unity.UIWidgets.engine2;
-using Unity.UIWidgets.foundation;
-//using Unity.UIWidgets.material;
-using Unity.UIWidgets.painting;
-using Unity.UIWidgets.ui;
-using Unity.UIWidgets.widgets;
-using FontStyle = Unity.UIWidgets.ui.FontStyle;
-using Image = Unity.UIWidgets.widgets.Image;
-using TextStyle = Unity.UIWidgets.painting.TextStyle;
-using ui_ = Unity.UIWidgets.widgets.ui_;
-using Unity.UIWidgets.cupertino;
-using Unity.UIWidgets.rendering;
-//using UIWidgetsGallery.gallery;
-using Unity.UIWidgets.service;
-using Brightness = Unity.UIWidgets.ui.Brightness;
-using UnityEngine;
-using System;
-using UIWidgetsGallery.gallery;
-using Color = Unity.UIWidgets.ui.Color;
-using Random = UnityEngine.Random;
-
-namespace UIWidgetsSample
-{
-    public class UIWidgetsExample : UIWidgetsPanel
-    {
-        protected void OnEnable()
-        {
-            base.OnEnable();
-        }
-
-        protected override void main()
-        {
-            ui_.runApp(new MyApp());
-        }
-
-        class MyApp : StatelessWidget
-        {
-            public override Widget build(BuildContext context)
-            {
-                return new CupertinoApp(
-                    home: new HomeScreen()
-                );
-
-            }
-        }
-
-
-
-        class HomeScreen : StatelessWidget
-        {
-            public override Widget build(BuildContext context)
-            {
-                // return new CupertinoPageScaffold(
-                //     child: new Center(
-                //         child: new CupertinoButton(
-                //             child: new Text(
-                //                 "THIS IS TAB #"
-                //             ),
-                //             onPressed: () =>
-                //             {
-                //                 Navigator.of(context).push(
-                //                     new CupertinoPageRoute(builder: (contex3) =>
-                //                     {
-                //                         return
-                //                             new CupertinoAlertDemo();
-                //                     })
-                //                 );
-                //             }
-                //         )
-                //         //new Text("hello world!", style: CupertinoTheme.of(context).textTheme.navTitleTextStyle)
-                //     )
-                //     //backgroundColor: Colors.brown
-                // );
-
-                List<BottomNavigationBarItem> items = new List<BottomNavigationBarItem>();
-                items.Add(new BottomNavigationBarItem(
-                    icon: new Icon(CupertinoIcons.bell),
-                    title: new Text("views")
-                ));
-                items.Add(new BottomNavigationBarItem(
-                    icon: new Icon(CupertinoIcons.eye_solid),
-                    title: new Text("articles")
-                ));
-                return new CupertinoTabScaffold(
-                    tabBar: new CupertinoTabBar(
-                        items: items
-                    ),
-                    tabBuilder: ((contex, index) =>
-                    {
-                        //return new Center(child: new Text("hello"));
-                        return new CupertinoTabView(
-                            builder: (contex1) =>
-                            {
-                                return new CupertinoPageScaffold(
-                                    navigationBar: new CupertinoNavigationBar(
-                                        middle: (index == 0) ? new Text("views") : new Text("articles")
-                                    ),
-                                    child: new Center(
-                                        
-                                        child: new CupertinoButton(
-                                            child: new Text(
-                                                "THIS IS TAB #",
-                                                style: CupertinoTheme.of(contex1)
-                                                    .textTheme
-                                                    .navTitleTextStyle
-                                                //.copyWith(fontSize:32)
-                                            ),
-
-                                            onPressed: () =>
-                                            {
-                                                Navigator.of(contex1).push(
-                                                    new CupertinoPageRoute(builder: (contex3) =>
-                                                    {
-                                                        return
-                                                            new CupertinoAlertDemo(); //DetailScreen1(index == 0 ? "views" : "articles");
-                                                    })
-                                                );
-                                            }
-                                        )
-                                    )
-                                );
-                            }
-                        );
-                    })
-
-                );
-
-
-            }
-        }
-        
-        
-
-        public class DetailScreen1 : StatelessWidget
-        {
-            public DetailScreen1(string topic)
-            {
-                this.topic = topic;
-
-            }
-
-            public string topic;
-
-            public override Widget build(BuildContext context)
-            {
-                return new CupertinoPageScaffold(
-                    navigationBar: new CupertinoNavigationBar(
-                        //middle: new Text("Details")
-                    ),
-                    child: new Center(
-                        child: new Text("hello world")
-                    )
-                );
-            }
-        }
-
-              
-    }
-
-    
-}