Initial Commit

Library/PackageCache/com.unity.collab-proxy@1.3.9/Editor/Components/AdapterListView.cs

@@ -0,0 +1,84 @@
+using System;
+using JetBrains.Annotations;
+using Unity.Cloud.Collaborate.Views.Adapters;
+using Unity.Cloud.Collaborate.Views.Adapters.ListAdapters;
+using UnityEngine.Assertions;
+using UnityEngine.UIElements;
+
+namespace Unity.Cloud.Collaborate.Components
+{
+    internal class AdapterListView : VisualElement, IAdapterObserver
+    {
+        public const string UssClassName = "unity-adapter-list-view";
+        public const string ListViewUssClassName = UssClassName + "__list-view";
+
+        IAdapter m_Adapter;
+        readonly ListView m_ListView;
+
+        public AdapterListView()
+        {
+            AddToClassList(UssClassName);
+            m_ListView = new ListView();
+            m_ListView.style.flexGrow = new StyleFloat(1);
+            m_ListView.AddToClassList(ListViewUssClassName);
+            Add(m_ListView);
+        }
+
+        /// <summary>
+        /// Set the adapter for the list.
+        /// </summary>
+        /// <param name="adapter">Adapter for the list to use.</param>
+        /// <typeparam name="T">The type of the list entries.</typeparam>
+        public void SetAdapter<T>(BaseListAdapter<T> adapter) where T : VisualElement
+        {
+            Assert.IsNull(m_Adapter, "There cannot be more than one adapter at a time.");
+            m_Adapter = adapter;
+            m_Adapter.RegisterObserver(this);
+            m_ListView.makeItem = m_Adapter.MakeItem;
+            m_ListView.bindItem = m_Adapter.BindItem;
+            m_ListView.itemHeight = m_Adapter.Height;
+            NotifyDataSetChanged();
+        }
+
+        /// <summary>
+        /// Remove adapter from the list.
+        /// </summary>
+        public void RemoveAdapter()
+        {
+            Assert.IsNotNull(m_Adapter, "Cannot remove a non-existent adapter.");
+            m_Adapter.DeregisterObserver(this);
+            m_ListView.makeItem = null;
+            m_ListView.bindItem = null;
+            m_ListView.itemHeight = 0;
+            m_ListView.itemsSource = null;
+            m_Adapter = null;
+        }
+
+        /// <summary>
+        /// Set the selection type of the list.
+        /// </summary>
+        public SelectionType SelectionType
+        {
+            set => m_ListView.selectionType = value;
+            get => m_ListView.selectionType;
+        }
+
+        /// <summary>
+        /// Notify that the data in this list has changed.
+        /// </summary>
+        public void NotifyDataSetChanged()
+        {
+            // TODO: pagination support would be done here if it happens.
+            // Feed the ListView a dummy list of the correct length.
+            m_ListView.itemsSource = new bool[m_Adapter.GetEntryCount()];
+        }
+
+        public void ScrollToIndex(int idx)
+        {
+            m_ListView.ScrollToItem(idx);
+        }
+
+        [UsedImplicitly]
+        public new class UxmlFactory : UxmlFactory<AdapterListView> { }
+    }
+}