optimize: only navigate to new commit if it is necessary

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/Fetch.cs

@@ -68,6 +68,7 @@ public override async Task<bool> Sure()
         {
             using var lockWatcher = _repo.LockWatcher();
 
+            var navigateToUpstreamHEAD = _repo.SelectedView is Histories { AutoSelectedCommit: { IsCurrentHead: true } };
             var notags = _repo.Settings.FetchWithoutTags;
             var force = _repo.Settings.EnableForceOnFetch;
             var log = _repo.CreateLog("Fetch");
@@ -89,11 +90,14 @@ public override async Task<bool> Sure()
 
             log.Complete();
 
-            var upstream = _repo.CurrentBranch?.Upstream;
-            if (!string.IsNullOrEmpty(upstream))
+            if (navigateToUpstreamHEAD)
             {
-                var upstreamHead = await new Commands.QueryRevisionByRefName(_repo.FullPath, upstream.Substring(13)).GetResultAsync();
-                _repo.NavigateToCommit(upstreamHead, true);
+                var upstream = _repo.CurrentBranch?.Upstream;
+                if (!string.IsNullOrEmpty(upstream))
+                {
+                    var upstreamHead = await new Commands.QueryRevisionByRefName(_repo.FullPath, upstream.Substring(13)).GetResultAsync();
+                    _repo.NavigateToCommit(upstreamHead, true);
+                }
             }
 
             _repo.MarkFetched();

src/ViewModels/FetchInto.cs

@@ -35,8 +35,12 @@ public override async Task<bool> Sure()
 
             log.Complete();
 
-            var newHead = await new Commands.QueryRevisionByRefName(_repo.FullPath, Local.Name).GetResultAsync();
-            _repo.NavigateToCommit(newHead, true);
+            if (_repo.SelectedViewIndex == 0)
+            {
+                var newHead = await new Commands.QueryRevisionByRefName(_repo.FullPath, Local.Name).GetResultAsync();
+                _repo.NavigateToCommit(newHead, true);
+            }
+
             return true;
         }
 

src/ViewModels/Merge.cs

@@ -71,8 +71,12 @@ public override async Task<bool> Sure()
 
             log.Complete();
 
-            var head = await new Commands.QueryRevisionByRefName(_repo.FullPath, "HEAD").GetResultAsync();
-            _repo.NavigateToCommit(head, true);
+            if (_repo.SelectedViewIndex == 0)
+            {
+                var head = await new Commands.QueryRevisionByRefName(_repo.FullPath, "HEAD").GetResultAsync();
+                _repo.NavigateToCommit(head, true);
+            }
+
             return true;
         }
 

src/ViewModels/Pull.cs

@@ -160,8 +160,12 @@ public override async Task<bool> Sure()
 
             log.Complete();
 
-            var head = await new Commands.QueryRevisionByRefName(_repo.FullPath, "HEAD").GetResultAsync();
-            _repo.NavigateToCommit(head, true);
+            if (_repo.SelectedViewIndex == 0)
+            {
+                var head = await new Commands.QueryRevisionByRefName(_repo.FullPath, "HEAD").GetResultAsync();
+                _repo.NavigateToCommit(head, true);
+            }
+
             return rs;
         }
 

src/ViewModels/Repository.cs

@@ -985,10 +985,10 @@ public void NavigateToCommit(string sha, bool isDelayMode = false)
             {
                 _navigateToCommitDelayed = sha;
             }
-            else if (_histories != null)
+            else
             {
                 SelectedViewIndex = 0;
-                _histories.NavigateTo(sha);
+                _histories?.NavigateTo(sha);
             }
         }