Mohamed Boudra
c3bcad687d
* fix(app): prevent and recover workspace layout crash loops * fix(desktop): capture resized browser tabs without hanging A resident guest can paint fresh pixels after resize while capturePage's native surface-copy request remains pending. The same failed guest returns a fresh frame through frame subscription, so waiting for resize or another animation frame does not correct the failing copy request. Capture one subscribed frame within the existing five-second budget and release the subscription on completion or cancellation. Preserve temporary frame production and its original throttling policy. Remove viewport copy retries and E2E screenshot polling; assert the resized image dimensions. Refs #4866. Three full real-Electron browser journeys passed under Xvfb, including physical clicks and fresh screenshots while the window is hidden. * test(app): choose Agent before exercising the runtime catalog The newly merged catalog journey assumed an empty workspace opened an agent draft tab. This branch opens the New launcher, so create the agent draft tab explicitly before checking its composer and model choices. * fix: settle closed browser captures and validate persisted layout fixtures Destroying a guest during frame subscription left its screenshot pending until the capture deadline and blocked queued captures. Reject at destruction, remove the listener on every exit, and return browser_tab_closed. The regression proves immediate settlement and queue release. Reuse the unchanged persisted layout schema from a UI-independent module so the recovery fixture validates storage before editing it. * test(app): encapsulate Explorer layout setup and cleanup Keep persisted layout schemas and corrupted-state construction inside the seedCorruptedWorkspaceLayout helper. Use the existing withWorkspace fixture for cleanup in all four Explorer journeys so test bodies follow a straight setup, action and assertion flow. * test(app): target the selected workspace in layout recovery The corruption helper selected the first persisted entry, so a multi-workspace journey could leave the intended workspace untouched. Resolve its exact persistence key from the requested workspace ID and fail setup when absent. The failing-first journey now preserves an earlier workspace with an agent draft tab while recovering the selected workspace.
5.5 KiB
Explorer sidebar and side pane
The Explorer sidebar and the side pane share panel implementations, but they have different shell contracts.
| Surface | Purpose | Lifecycle |
|---|---|---|
| Explorer sidebar | Files and Changes navigation | Cmd+E shows or hides the dedicated dock |
| Side pane | Ordinary workspace content | Created and closed like any workspace pane |
Panel host contract
Every desktop panel registers its supported PaneHost values and presentation. Launchers derive
fixed-target labels and icons from that registration, filter by host, and never substitute one
panel type for another. Tab moves reject unsupported destinations, and placement resolves only to
a compatible pane.
Files and Changes are the Explorer defaults and its singleton navigation views. Other compatible
tabs, including agents, terminals, files, and diffs, can move between Explorer and main panes.
Keep panel implementations independent of either shell. WorkspacePanelHost owns mounting and
retention, while each shell owns its tabs, focus, dragging, resizing, and shortcuts.
Explorer sidebar
packages/app/src/workspace-tabs/explorer-sidebar.ts owns show, hide, toggle, and view selection.
On desktop, the shell is rendered outside the workspace split canvas so it divides the full
workspace, including the header. It has its own persisted width and resize handle. Main-pane splits
never read or modify that width.
packages/app/src/workspace-tabs/open-supporting-view.ts owns semantic Changes and pull-request
opens. Compact and wide native layouts select the matching Explorer tab. Desktop Changes opens
follow the shared diff preference. Desktop pull requests use their Main panel, On the side, or
Explorer sidebar setting. Callers request the content and never choose the shell.
The composer Changes pill is a two-stage desktop action: it first reveals Explorer on Changes, then
routes later presses to the working diff through the shared diff preference.
The persisted layout still contains the Explorer pane so tabs survive reloads. The renderer removes
that pane from the workspace split tree and docks it separately. Persisted identifiers retain the
literal "explorer" pane id and explorerPaneIdByWorkspace key for compatibility.
The tab rail has no inline add or close controls. Its context menu opens a New Tab launcher and toggles Files, Changes, and Explorer-compatible workspace-scoped plugin panels from the shared launch catalog. Individual tab menus close instances or move compatible tabs to main. Explorer tabs can be reordered, but the dock cannot be split. Selecting an Explorer tab does not change workspace focus.
Cmd+E shows or hides Explorer without changing its selected view. Compact layouts use the combined
full-screen Explorer overlay for Changes, Files, and pull requests, and close it after a file opens. Compact Changes has no tree rail; its overview is the Jump to file action (packages/app/src/git/jump-to-file/), a sheet over the same changed-files tree the desktop rail renders.
Wide native layouts without pane splits use the same combined content in a resizable inline dock;
opening a file leaves that dock visible. Both presentations keep their selection in the panel store
and reuse the layout store's per-workspace Explorer width. They do not create a second Explorer
lifecycle.
Side pane
packages/app/src/workspace-tabs/open-beside.ts owns content opened beside the user's work. The
layout store remembers one ordinary pane per workspace. The first side open creates a full-height
right split around the workspace root; later side opens reuse it.
Removing a pane clears its remembered id; a later side open creates a new pane. The last visible ordinary pane stays when its final tab closes and shows the New launcher. An empty workspace does not automatically create an agent draft tab; choosing Agent opens one. Explorer cannot replace the workspace canvas, even when visible. Restoring a saved layout enforces the same rule while preserving Explorer and saved tab content. There is no hidden side-pane lifecycle.
Placement intent still controls existing tabs:
| Mode | New target | Existing target |
|---|---|---|
pane |
opens in the requested pane | moves to the requested pane |
prefer |
opens in the requested pane | stays where the user placed it |
focused |
opens in the focused pane | focuses it where it already lives |
ambient |
opens in a compatible pane | focuses it where it already lives |
Explicit Open to Side uses pane. Implicit opens use prefer, so a preference affects only a
new target and never yanks an existing tab out of a user-selected pane.
Routing preferences
Desktop Settings → Layout → Open location has independent Main panel or On the side choices for Explorer Files, diffs, chat files, files opened from diffs, and subagents. They default to Main panel. Mobile ignores them.
Pull requests have a three-way open location: Main panel, On the side, or Explorer sidebar. Explorer sidebar is the default. Compact layouts always open pull requests in Explorer regardless of this desktop preference.
Panels request an implicit open through the narrow openPreferredTarget(target, source) pane
contract. Entry points outside panels use openPreferredWorkspaceTarget. Do not branch on a
specific shell inside a panel.