🐞 Programmatic cursor state updates are never applied

[gerardp]

Description

Programmatic updates to SourceEditorState.cursorPositions are never applied to the underlying TextViewController.

In SourceEditor.updateControllerWithState(_:controller:), the new cursor positions are compared with the same state value:

if let cursorPositions = state.cursorPositions, cursorPositions != state.cursorPositions {
    controller.setCursorPositions(cursorPositions)
}

Because cursorPositions was just unwrapped from state.cursorPositions, the comparison is always false.

To Reproduce

1. Create a SourceEditor with a binding to SourceEditorState.
2. After the editor appears, programmatically assign a different value to state.cursorPositions.
3. Observe that the editor cursor does not move to the requested position.

Expected Behavior

Changing SourceEditorState.cursorPositions should update the cursor positions in the underlying controller.

The comparison likely needs to use the controller's current state:

if let cursorPositions = state.cursorPositions,
   cursorPositions != controller.cursorPositions {
    controller.setCursorPositions(cursorPositions)
}

Version Information

CodeEditSourceEditor: main, revision 1fa4d3c
macOS: 15.7.9
Xcode: 26.3 (17C529)

Additional Context

No matching open or closed issue was found before filing this report.

Screenshots

Not applicable.

[gerardp]

I’ll work on a small fix that compares the requested cursor positions with the controller’s current positions, plus a focused regression test.