The row is deleted from the grid template below 600px, not the header
hidden. That is 3.25em of a 439 CSS px viewport -- the single biggest
vertical win the reference device has to give, and the reason the issue
asks for the row rather than for a smaller bar.
Each of the five things the bar held has somewhere else to be there:
nav-history is the platform's own back gesture and was already gone from
899 down, the job indicator is <job-band> (#62, which is what this was
blocked on), the search box is a modal opened from the view's own
header, the library filter is Settings -> Libraries, and the wordmark
stays where it is.
Three things are load-bearing.
**The header is visually hidden rather than display: none**, because
that h1 is the document's top-level heading and several pages have no
other one -- page-header renders no h1 when its heading is empty, and
Settings has no page-header at all. Its four controls are display: none
*inside* it, which is what keeps them out of the tab order: a
visually-hidden container is still focusable, and tabbing into a search
box nobody can see is worse than not having one.
**The fit pass stands down**, from the bar's computed position rather
than from a width. With the bar out of flow there is no content box to
measure children against, and a pass that ran would collapse the
wordmark on every resize and report success about a 1px box.
**top-bar-fit.spec.ts keeps 390 and asserts the stronger property.**
"Nothing hangs out of the bar" is trivially true of a bar with no row
and would pass on a build that merely broke it, so what that width asks
now is that the content starts where the row above it ends. Measuring
against the window instead would have been asserting "and no background
job is running", which that spec is not about and cannot arrange.
Closes#57
The bar was 611px inside a 600px viewport at the bottom of the Compact
band, and 862px while a scan with a real library's title ran, because
`job-indicator` is `hidden` when idle and 235px wide when it is not.
`body` is `overflow-x: auto`, so a user got a horizontal scrollbar on a
shell #24 promised would not need one — and the band is 600 to 899 with
work in flight, not the 600 to 610 the idle measurement suggested.
`services/top-bar-fit.ts` is `page-header`'s treatment one bar up: a
ResizeObserver, every pass starting from all-visible, hiding the
lowest-priority child until it fits. Measured rather than breakpointed
because three of the five children are as wide as their content — the
library filter by the longest library name, the indicator by the
running job's title, the search box by its view-scoped placeholder — so
any width picked is right for one library, one job and one view.
What yields is decided by #24's own sentence, which rules out the two
cheapest candidates in the Direction. Hiding the library filter takes
away an action, since it is the only control in the app that selects a
library (filed as #148, which is the phone already doing it), and
collapsing search to an icon is #57's, which is blocked behind #62. So
the wordmark yields first — a brand the window title bar repeats, and
visually-hidden rather than `display: none` because that h1 is the
document's heading — and then the indicator's label, leaving the ring,
which the component already does below 600px and whose live region
announces the state either way.
"Fits" is the children against the content box, not `scrollWidth`
against `clientWidth`: `scrollWidth` counts the left padding and not
the right, so the first version read 700/700 with the indicator sitting
in the whole right gutter. And the bar does not resize when a job
starts, which is the case this is for, so every child is observed too.
Pinned before it was fixed, as the issue asks. On the unfixed build the
new spec fails at 600 idle and at 600, 800 and 900 with a job, and
passes at 390, 899 and 1440; `layout-overflow.spec.ts` gains 600x600
and failed there. That spec asserts on the *shell*, so it was green
throughout this defect — the per-child measurement is #69's lesson, and
it is what caught the gutter case above.
Closes#143
logan