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Lift the snackbar above a toolbar placed at the bottom

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SealShare's only navigation is a floating toolbar at place="bottom". In
1.x it set --material-bottom-bar to lift the snackbar over it; in 2.0.0
the toolbar reads that variable to place itself, so an application can
no longer set it, and the snackbar landed on the toolbar. M3 nudges a
snackbar "upward to avoid overlapping FABs/docked toolbars" and never
puts one in front of navigation.

A bottom-placed toolbar now publishes --material-bottom-toolbar, the
distance from the window's bottom edge to its top: floating 64px (as
tall as an md or lg FAB beside it), docked 64px plus the safe area it
pads, rounded docked floating from 840px. It is declared on :root and
again on the scaffold's root, the only place its formula sees the bar.
The snackbar clears whichever of the bar and the toolbar reaches higher,
and a page pads its end with it. Two Chromium tests, both failing on the
old formula: a docked toolbar on a scaffold's navigation bar, and a
floating toolbar without a scaffold (plan step 46).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Andreas Reinhold / reini
2026-09-15 10:47:50 +02:00
co-authored by Claude Opus 5
parent 579af9e7a9
commit d0bed0da69
9 changed files with 124 additions and 9 deletions
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tests/Feature/Components/ToastTest.php
+4 -2
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@@ -87,8 +87,10 @@ it('keeps the live region in the page, polite, around the snackbar that comes an
->and(substr_count($html, 'aria-live'))->toBe(1);
});
it('lifts above a bottom bar, publishing its own height for a FAB to clear', function () {
it('lifts above a bottom bar or a toolbar placed at the bottom, publishing its own height for a FAB to clear', function () {
// Whichever reaches higher: M3 nudges a snackbar clear of a docked toolbar and never puts one
// in front of navigation (toolbar.css publishes --material-bottom-toolbar).
expect(ComponentStylesheet::read('toast')->declarations('[data-md-toast]'))->toMatchArray([
'bottom' => 'calc(var(--material-bottom-bar, 0px) + var(--md-sys-measurement-space200))',
'bottom' => 'calc(max(var(--material-bottom-bar, 0px), var(--material-bottom-toolbar, 0px)) + var(--md-sys-measurement-space200))',
]);
});