testss

Library/PackageCache/com.unity.searcher@4.3.2/Editor/Searcher/SearcherHighlighter.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Text.RegularExpressions;
+using UnityEngine.UIElements;
+
+namespace UnityEditor.Searcher
+{
+    static class SearcherHighlighter
+    {
+        const char k_StartHighlightSeparator = '{';
+        const char k_EndHighlightSeparator = '}';
+        const string k_HighlightedStyleClassName = "Highlighted";
+
+        public static void HighlightTextBasedOnQuery(VisualElement container, string text, string query)
+        {
+            var formattedText = text;
+            var queryParts = query.Split(new[] {" "}, StringSplitOptions.RemoveEmptyEntries);
+            var regex = string.Empty;
+            for (var index = 0; index < queryParts.Length; index++)
+            {
+                var queryPart = queryParts[index];
+                regex += $"({queryPart})";
+                if (index < queryParts.Length - 1)
+                    regex += "|";
+            }
+
+            var matches = Regex.Matches(formattedText, regex, RegexOptions.IgnoreCase);
+            foreach (Match match in matches)
+            {
+                formattedText = formattedText.Replace(match.Value,
+                    $"{k_StartHighlightSeparator}{match.Value}{k_EndHighlightSeparator}");
+            }
+
+            BuildHighlightLabels(container, formattedText);
+        }
+
+        static void BuildHighlightLabels(VisualElement container, string formattedHighlightText)
+        {
+            if (string.IsNullOrEmpty(formattedHighlightText))
+                return;
+
+            var substring = string.Empty;
+            var highlighting = false;
+            var skipCount = 0;
+            foreach (var character in formattedHighlightText.ToCharArray())
+            {
+                switch (character)
+                {
+                    // Skip embedded separators
+                    // Ex:
+                    // Query: middle e
+                    // Text: Middle Eastern
+                    // Formatted Text: {Middl{e}} {E}ast{e}rn
+                    //                      ^ ^
+                    case k_StartHighlightSeparator when highlighting:
+                        skipCount++;
+                        continue;
+                    case k_StartHighlightSeparator: {
+                        highlighting = true;
+                        if (!string.IsNullOrEmpty(substring))
+                        {
+                            container.Add(new Label(substring));
+                            substring = string.Empty;
+                        }
+
+                        continue;
+                    }
+                    case k_EndHighlightSeparator when skipCount > 0:
+                        skipCount--;
+                        continue;
+                    case k_EndHighlightSeparator: {
+                        var label = new Label(substring);
+                        label.AddToClassList(k_HighlightedStyleClassName);
+                        container.Add(label);
+
+                        highlighting = false;
+                        substring = string.Empty;
+
+                        continue;
+                    }
+                    default:
+                        substring += character;
+                        break;
+                }
+            }
+
+            if (!string.IsNullOrEmpty(substring))
+            {
+                var label = new Label(substring);
+                if (highlighting)
+                    label.AddToClassList(k_HighlightedStyleClassName);
+                container.Add(label);
+            }
+        }
+    }
+}