From 269fc1fd6bd2ff373efab8ce75cb2576943f7bff Mon Sep 17 00:00:00 2001
From: David Schulz <david.schulz@qt.io>
Date: Tue, 25 Jun 2024 15:25:56 +0200
Subject: [PATCH] LanguageClient: optimize call and type hierarchy

Trigger a fetch from the can fetch function in order to get whether the
item has children. This information is used to show the expansion marker
for items that have children, and not for items that have not been
fetched yet.

Change-Id: Ifc20588aa805368369e72fc8501244f64bbbc91d
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
---
 src/plugins/languageclient/callandtypehierarchy.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/plugins/languageclient/callandtypehierarchy.cpp b/src/plugins/languageclient/callandtypehierarchy.cpp
index 3d2e9eff144..8cfc3578c37 100644
--- a/src/plugins/languageclient/callandtypehierarchy.cpp
+++ b/src/plugins/languageclient/callandtypehierarchy.cpp
@@ -76,7 +76,12 @@ protected:
     }
 
 private:
-    bool canFetchMore() const override { return m_client && !m_fetchedChildren; }
+    bool canFetchMore() const override
+    {
+        if (m_client && !m_fetchedChildren)
+            const_cast<HierarchyItem*>(this)->fetchMore();
+        return false;
+    }
 
     void fetchMore() override
     {
@@ -96,8 +101,6 @@ private:
                             appendChild(new HierarchyItem(getSourceItem(item), m_client));
                     }
                 }
-                if (!hasChildren())
-                    update();
             });
         m_client->sendMessage(request);
     }