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Keep one workspace view per window across session switches - #1500
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Check name Status Explanation Linked Issues check Issue #1497requires one retained workspace view per template across close-to-launcher and local/remote switches.MainWindow.axamlusesRetainedViewTemplatefor both workspace models, and `Retaine…Out of Scope Changes check The changes stay within issue #1497. The retained-template implementation and workspace smoke tests implement and verify view reuse. The chat reset, terminal paste guard, and related tests support cor…Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: reusing one workspace view across session switches. Full details: Linked Issues check
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Explanation
Issue
#1497requires one retained workspace view per template across close-to-launcher and local/remote switches.MainWindow.axamlusesRetainedViewTemplatefor both workspace models, andRetainedViewTemplatereturns the retained view after detachment. The added smoke tests verify local reopen reuse, remote reuse across a local session, model matching, and rebinding.ChatTabView.OnDataContextChangedresets session-specific reading state.TerminalClipboard.PasteAsyncdrops a paste when the terminal model changes during the clipboard read.
Full details: Out of Scope Changes check
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Explanation
The changes stay within issue
#1497. The retained-template implementation and workspace smoke tests implement and verify view reuse. The chat reset, terminal paste guard, and related tests support correct rebinding of reused views.RemoteHosttest-fixture changes support the remote reuse test. No unrelated product behavior is identified.
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PR Summary by QodoReuse workspace views across session switches
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| <views:RetainedViewTemplate x:DataType="vm:WorkspaceViewModel"> | ||
| <views:WorkspaceView /> | ||
| </DataTemplate> | ||
| <DataTemplate x:DataType="vm:RemoteSessionViewModel"> | ||
| </views:RetainedViewTemplate> |
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When a user scrolls away from the bottom in session A, closes it, and opens session B, this template now returns the same entire WorkspaceView, including its ChatTabView. That control keeps session-specific fields such as _followTail and the existing scroll viewer offset, and has no DataContextChanged reset; consequently session B can open at an inherited scroll position and remain opted out of following new messages. Reset transient child-view state when the data context changes before reusing this control.
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Valid — ChatTabView now resets follow-tail, the toggle anchor, thumb and smooth-scroll state in OnDataContextChanged, so the next session opens at the tail. A_new_session_in_the_same_view_opens_at_the_bottom_and_follows failed before the change. (A direct local-to-local switch already reused this view before this PR, so it fixes that path too.) 094a975
Code Review by Qodo
1. Closed sessions remain in memory until reopened
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| new Control? Build(object? data, Control? existing) { | ||
| // Another presenter matching this template must not steal the view from the one showing it. | ||
| if (_view is { Parent: not null } && !ReferenceEquals(_view, existing)) return base.Build(data, null); | ||
| return _view ??= base.Build(data, null); |
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1. Closed sessions remain in memory until reopened 🐞 Bug ☼ Reliability
RetainedViewTemplate keeps the detached workspace control in _view, but neither the template nor WorkspaceView clears its session DataContext when the control leaves the presenter. After CloseWorkspace() sets CurrentWorkspace to null, the cached control can keep the closed workspace model, its subscription, and lazily created panes reachable until another session replaces its context.
Agent Prompt
## Issue description
The cached workspace view must not keep a closed session model or session-specific pane contents while it is detached.
## Fix Focus Areas
- src/Capacitor.App/Views/RetainedViewTemplate.cs[18-21]
- src/Capacitor.App/Views/WorkspaceView.axaml.cs[29-47]
- src/Capacitor.App/Views/RemoteSessionView.axaml.cs[25-48]
## Recommended Fix
On detachment, clear session-specific DataContext and contents and dispose subscriptions in both retained views. Ensure attaching a new session restores their subscriptions, and test that the cached view no longer references the closed model before reopening.
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Not reproduced: the view's DataContext is inherited from the presenter, so removing it from the presenter on close clears it, and WorkspaceView's DataContextChanged handler then disposes its subscription and drops the PR reader. Reopening_a_session_after_a_close_reuses_the_workspace_view now asserts the retained view's DataContext is null while closed. 094a975
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Actionable comments posted: 1
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Inline comments:
Review comments at @test/Capacitor.App.Tests.Unit/MainWindowSmokeTests.cs:
- Line 538: Extend Each_workspace_template_matches_only_its_own_model to cover
opening a remote session, switching to a local session, and then opening another
remote session; assert the original remote view instance is reused and its
DataContext is updated to the new remote session.
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📒 Files selected for processing: 3
src/Capacitor.App/Views/MainWindow.axamlsrc/Capacitor.App/Views/RetainedViewTemplate.cstest/Capacitor.App.Tests.Unit/MainWindowSmokeTests.cs
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A macOS accessibility peer keeps its detached control alive, so a view built afresh after each close or local/remote switch stayed in memory for good. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Review findings and what happened to them, as of 094a975:
The upstream retention bug is AvaloniaUI/Avalonia#8240; this PR only bounds it to one view per template. |
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Closes #1497 — AI-3804
What & why
On macOS, Avalonia.Native's accessibility peers hold strong handles to controls that have left the window (AvaloniaUI/Avalonia#8240), so every
WorkspaceViewthe workspace slot builds stays in memory with its terminal and view model. The slot builds a new one whenever its content passes through null or the other template — every close to the launcher and every local/remote switch.RetainedViewTemplatebuilds its view once and returns it on every later build, capping the leak at one view per template.Where to look
The view is now reused across sessions after a detach, not only on a direct local-to-local switch (which already recycled it). Per-session state on the reused controls resets on rebind: the chat view starts at the tail again, and a terminal paste whose session was swapped out before the clipboard answered is dropped (no test — the headless clipboard answers synchronously).
Verification
WorkspaceViews and 8WorkspaceViewModels, 23 and 7 of them rooted only byAvnAutomationPeer.Reopening_a_session_after_a_close_reuses_the_workspace_viewfails with the plainDataTemplateand passes with the change.A_new_session_in_the_same_view_opens_at_the_bottom_and_followsfails without the chat reset; remote → local → remote reuse is pinned too.Capacitor.App.Tests.Unit: 3249 passed, 0 failed;--no-incrementalapp build has no warnings.🤖 Generated with Claude Code
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