The status line takes back what is no longer true

[dmitrat]

Found by clicking through the application before a release: with no editor open anywhere, the line read Editing table: Products. The tab had been opened and closed again, and the sentence stayed behind it.

The distinction

Most of what this line carries is an event - executed in 9 ms, loaded 28 rows - and an event stays true after it happens. That is why the line is not simply cleared whenever something changes: clearing it would throw away the answer to the last thing the user did.

Editing table X is not an event. It is a state, it belongs to the tab, and it ends when the tab does.

The fix

A state is said with an owner - SayThisWhile(tab, …) - and closing that tab takes it back. The owner is matched by reference and by comparing the line to what was set, so a message that arrived from anywhere else in the meantime is never taken away by the owner closing afterwards.

The guard

TheStatusLineTakesBackWhatIsNoLongerTrueTests, three cases, two of them in the other direction:

• closing the editor takes Editing table Customers off the line;
• a message that arrived after the editor opened stays when the editor closes;
• closing a query tab leaves what it reported on the line.

Red with the call removed from the close path.

Studio: 1030 green.

🤖 Generated with Claude Code