Restructured for new direction.

Assets/Plugins/AssetUsageDetector/Editor/SearchResultTooltip.cs

@@ -0,0 +1,91 @@
+using System.Reflection;
+using UnityEditor;
+using UnityEngine;
+
+namespace AssetUsageDetectorNamespace
+{
+	public class SearchResultTooltip : EditorWindow
+	{
+		private static SearchResultTooltip mainWindow;
+		private static string tooltip;
+
+		private static GUIStyle m_style;
+		internal static GUIStyle Style
+		{
+			get
+			{
+				if( m_style == null )
+				{
+					m_style = (GUIStyle) typeof( EditorStyles ).GetProperty( "tooltip", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static ).GetValue( null, null );
+					m_style.richText = true;
+				}
+
+				return m_style;
+			}
+		}
+
+		public static void Show( Rect sourcePosition, string tooltip )
+		{
+            // Don't lose focus to the previous window
+            EditorWindow prevFocusedWindow = focusedWindow;
+
+            if (!mainWindow)
+            {
+                mainWindow = CreateInstance<SearchResultTooltip>();
+                mainWindow.ShowPopup();
+            }
+
+			Vector2 preferredSize = Style.CalcSize( new GUIContent( tooltip ) ) + Style.contentOffset + new Vector2( Style.padding.horizontal + Style.margin.horizontal, Style.padding.vertical + Style.margin.vertical );
+			Rect preferredPosition;
+
+			Rect positionLeft = new Rect( sourcePosition.position - new Vector2( preferredSize.x, 0f ), preferredSize );
+            Rect screenFittedPositionLeft = Utilities.GetScreenFittedRect(positionLeft, mainWindow);
+
+			Vector2 positionOffset = positionLeft.position - screenFittedPositionLeft.position;
+			Vector2 sizeOffset = positionLeft.size - screenFittedPositionLeft.size;
+			if( positionOffset.sqrMagnitude <= 400f && sizeOffset.sqrMagnitude <= 400f )
+				preferredPosition = screenFittedPositionLeft;
+			else
+			{
+				Rect positionRight = new Rect( sourcePosition.position + new Vector2( sourcePosition.width, 0f ), preferredSize );
+                Rect screenFittedPositionRight = Utilities.GetScreenFittedRect(positionRight, mainWindow);
+
+				Vector2 positionOffset2 = positionRight.position - screenFittedPositionRight.position;
+				Vector2 sizeOffset2 = positionRight.size - screenFittedPositionRight.size;
+				if( positionOffset2.magnitude + sizeOffset2.magnitude < positionOffset.magnitude + sizeOffset.magnitude )
+					preferredPosition = screenFittedPositionRight;
+				else
+					preferredPosition = screenFittedPositionLeft;
+			}
+
+			SearchResultTooltip.tooltip = tooltip;
+			mainWindow.minSize = preferredPosition.size;
+			mainWindow.position = preferredPosition;
+			mainWindow.Repaint();
+
+			if( prevFocusedWindow )
+				prevFocusedWindow.Focus();
+		}
+
+		public static void Hide()
+		{
+			if( mainWindow )
+			{
+				mainWindow.Close();
+				mainWindow = null;
+			}
+		}
+
+		private void OnGUI()
+		{
+			// If somehow the tooltip isn't automatically closed, allow closing it by clicking on it
+			if( Event.current.type == EventType.MouseDown )
+			{
+				Hide();
+				GUIUtility.ExitGUI();
+			}
+
+			GUI.Label( new Rect( Vector2.zero, position.size ), tooltip, Style );
+		}
+	}
+}