mcgilman opened a new pull request, #11138:
URL: https://github.com/apache/nifi/pull/11138
**Title:** NIFI-15818: Route-backed component selection for the connector
canvas
**Body:**
## Summary
- Implements route-backed component selection for the connector canvas so
that selecting a component on the canvas updates the URL and deep-linking to a
component URL centers the viewport on it
- Adds `selectComponents`, `deselectAllComponents`, and
`navigateWithoutTransform` actions with corresponding effects, reducer
handlers, and component wiring
- Fixes a corner case where dispatching `selectComponents` with an empty
components array would navigate to an invalid route; it now correctly delegates
to `deselectAllComponents`
## Details
**Selection routing:** Clicking a single component routes to
`/connectors/:id/canvas/:processGroupId/:type/:componentId`. Selecting multiple
components routes to `.../bulk/:id1,:id2,...`. Clicking the canvas background
deselects all and returns to the base canvas route. All selection-initiated
navigations use `replaceUrl: true` to avoid polluting browser history.
**`skipTransform` mechanism:** When the user selects a component on the
canvas, `navigateWithoutTransform` sets `skipTransform: true` in the reducer so
the resulting route change does not auto-center the viewport. When a deep link
is opened directly, `skipTransform` is false, so `onCanvasInitialized` calls
`centerOnSelection()` to center the viewport on the selected component(s).
**`leaveProcessGroup$` update:** Refactored to use the
`navigateWithoutTransform` action (instead of direct `router.navigate` +
`setSkipTransform`) after navigating to the parent process group and waiting
for the flow to load. This auto-selects the child process group in the parent
view, giving the user a visual reference of where they came from.
**Test cleanup:** Converted all effects tests from the `new
Promise<void>((resolve) => { setup().then(...) })` anti-pattern to
`async/await` with `firstValueFrom` from RxJS.
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