Add VRChat and GitHub packages to Unity project

Assets/Udon/Editor/ProgramSources/UdonGraphProgram/UI/GraphView/UdonGraphStatus.cs

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+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Experimental.UIElements;
+using UnityEditor.Experimental.UIElements;
+
+namespace VRC.Udon.Editor.ProgramSources.UdonGraphProgram.UI.GraphView
+{
+    public class UdonGraphStatus : ToolbarToggle
+    {
+        private VisualElement _detailsContainer;
+        private UdonProgramSourceView _programSourceView;
+        private UdonGraphProgramAsset _graphAsset;
+        private TextElement _label;
+
+        public UdonGraphStatus(VisualElement detailsContainer)
+        {
+            _detailsContainer = detailsContainer;
+
+            _label = new TextElement() { text = "-", name = "Content" };
+            _label.StretchToParentSize();
+            Add(_label);
+            OnValueChanged(ShowGraphAssetDetails);
+
+            _programSourceView = new UdonProgramSourceView();
+        }
+
+        private void ShowGraphAssetDetails(ChangeEvent<bool> changeEvent)
+        {
+            // Just remove it
+            if (!changeEvent.newValue)
+            {
+                RemoveIfContaining(_programSourceView);
+                return;
+            }
+
+            // else we need to make a new one and show it
+            if (_graphAsset == null)
+            {
+                Debug.LogError("Can't show Asset Details for a null asset.");
+                return;
+            }
+
+            RemoveIfContaining(_programSourceView);
+            _detailsContainer.Add(_programSourceView);
+            _programSourceView.BringToFront();
+        }
+
+        private void RemoveIfContaining(VisualElement element)
+        {
+            if (_detailsContainer.Contains(element))
+            {
+                _detailsContainer.Remove(element);
+            }
+        }
+
+        public void OnAssemble(bool success, string assembly)
+        {
+
+            if (!enabledInHierarchy || _label == null) return;
+
+            string newText;
+            Color flashColor;
+            Color targetColor;
+
+            // change visuals based on success
+            if(success)
+            {
+                newText = "OK";
+                flashColor = new Color(0, 1, 0);
+                targetColor = new Color(0.1f, 0.25f, 0.1f, alpha);
+            }
+            else
+            {
+                newText = "!";
+                flashColor = new Color(1, 0, 0);
+                targetColor = new Color(0.25f, 0.1f, 0.1f, alpha);
+            }
+
+            // Update visuals
+            _label.text = newText;
+            _label.style.backgroundColor = flashColor;
+            LerpColor(targetColor);
+            _programSourceView.SetText(assembly);
+        }
+
+        private Color targetColor;
+        private Color startColor;
+        private float lerpAmount = 0f;
+        private float alpha = 0.75f;
+
+        private void LerpColor(Color newColor)
+        {
+            startColor = _label.style.backgroundColor.value;
+            targetColor = newColor;
+            lerpAmount = 0f;
+            EditorApplication.update += UpdateColor;
+        }
+
+        private void UpdateColor()
+        {
+            lerpAmount += 0.01f;
+
+            if (lerpAmount >= 1)
+            {
+                EditorApplication.update -= UpdateColor;
+            }
+
+            if(_label != null)
+            {
+                _label.style.backgroundColor = Color.Lerp(startColor, targetColor, lerpAmount);
+            }
+        }
+
+        public override void Blur()
+        {
+            EditorApplication.update -= UpdateColor;
+        }
+
+        ~UdonGraphStatus()
+        {
+            EditorApplication.update -= UpdateColor;
+            if(_graphAsset != null)
+            {
+                _graphAsset.OnAssemble -= OnAssemble;
+            }
+        }
+
+        internal void LoadAsset(UdonGraphProgramAsset asset)
+        {
+            _graphAsset = asset;
+            _graphAsset.OnAssemble += OnAssemble;
+            _programSourceView.LoadAsset(asset);
+        }
+    }
+}