From 8b8490c8cd1e451ca94e726ace826de9b074f34e Mon Sep 17 00:00:00 2001
From: Henry Wylde <henry.wylde@jetbrains.com>
Date: Thu, 23 Feb 2023 10:02:05 +0100
Subject: [PATCH] RUBY-30957 add "Current" hint support for usages when using
 the new UsageSearcher APIs

(cherry picked from commit 2abfe555f5a3bb666714e97064f139c821ccb85a)

IJ-CR-103466

GitOrigin-RevId: 80f7404b46ae1397d802761e97b8ba438e3e4be7
---
 .../intellij/find/actions/ShowUsagesAction.java | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
index e3c35abe2968..cd7bdea722c1 100644
--- a/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
+++ b/platform/lang-impl/src/com/intellij/find/actions/ShowUsagesAction.java
@@ -11,6 +11,7 @@ import com.intellij.find.FindSettings;
 import com.intellij.find.findUsages.*;
 import com.intellij.find.impl.FindManagerImpl;
 import com.intellij.find.usages.api.SearchTarget;
+import com.intellij.find.usages.impl.Psi2UsageInfo2UsageAdapter;
 import com.intellij.icons.AllIcons;
 import com.intellij.ide.DataManager;
 import com.intellij.ide.util.PropertiesComponent;
@@ -58,6 +59,7 @@ import com.intellij.openapi.wm.IdeFocusManager;
 import com.intellij.psi.PsiDocumentManager;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiReference;
+import com.intellij.psi.SmartPsiFileRange;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.psi.search.LocalSearchScope;
 import com.intellij.psi.search.SearchScope;
@@ -103,6 +105,7 @@ import java.util.stream.Collectors;
 import static com.intellij.find.actions.ResolverKt.findShowUsages;
 import static com.intellij.find.actions.ShowUsagesActionHandler.getSecondInvocationHint;
 import static com.intellij.find.findUsages.FindUsagesHandlerFactory.OperationMode.USAGES_WITH_DEFAULT_OPTIONS;
+import static com.intellij.util.ObjectUtils.doIfNotNull;
 import static org.jetbrains.annotations.Nls.Capitalization.Sentence;
 
 public class ShowUsagesAction extends AnAction implements PopupAction, HintManagerImpl.ActionToIgnore {
@@ -634,6 +637,20 @@ public class ShowUsagesAction extends AnAction implements PopupAction, HintManag
         return usage -> usage instanceof UsageInfo2UsageAdapter &&
                         ((UsageInfo2UsageAdapter)usage).getUsageInfo().equals(originUsageInfo);
       }
+
+      int offset = editor.getCaretModel().getOffset();
+      return usage -> {
+        if (usage instanceof Psi2UsageInfo2UsageAdapter adapter) {
+          for (UsageInfo info : adapter.getMergedInfos()) {
+            final Segment range = doIfNotNull(info.getPsiFileRange(), SmartPsiFileRange::getRange);
+            if (range != null && range.getStartOffset() <= offset && offset <= range.getEndOffset()) {
+              return true;
+            }
+          }
+        }
+
+        return false;
+      };
     }
     return __ -> false;
   }