Andreas Reinhold / reiniandClaude Opus 5
cab8d804a5
Plan step 36 review of a149970d. Reduced motion writes a zero inset for
every item, so isMasked() never called one partly shown and a press on
an item the row cut off did nothing. It now reads the item's box against
the scrollport there, as it already did for multi-aspect, and the
browser test the rewrite added to document the gap asserts the reveal
instead (plan step 32's owed test).
A focused item's inset ring is 3px in again: Tailwind's
-outline-offset-3 is 3px, not the 12px the rewrite wrote.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
113 lines
4.9 KiB
CSS
113 lines
4.9 KiB
CSS
/*
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* <x-carousel-item>: one slide of an <x-carousel>, masked and shifted by the keyline maths
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* carousel.css's header describes, unless the row is full-screen or multi-aspect, where nothing
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* masks it at all (docs/reference/m3/components-actions-communication-containment.md § Carousel;
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* docs/audits/m3-alignment/containment.md, C-11, C-12, C-25).
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*
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* [data-md-carousel-item] the tab stop (C-18), a focusable `group`, `md-focus-ring`
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* [data-md-carousel-surface] the masked, shifted, extra-large-corner (28px) box
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* [data-md-carousel-content] the slot (an <img>, cropped)
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* [data-md-carousel-label] the "n of m"-named overlay on the scrim
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* [data-md-carousel-label-text]
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*
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* The item renders the shared `md-focus-ring` class (foundation/interaction.css) rather than a
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* hand-rolled ring — the box the class draws *is* the item's own whole hit area — refined here to
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* an inset ring, 3px in, its own width (the old `focus-visible:-outline-offset-3`): items sit 8px
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* apart with the row clipping them, so the class's own 2px *outward* offset would be cut off at the
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* row's edges and crowd the next item.
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*
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* Full-screen: edge to edge, no corner, no mask — `--material-carousel-shift`/`-inset` go unread.
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* Multi-aspect: the view writes the item's own `aspect-ratio` inline (`aspect`, a prop, held
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* inside M3's 9:16–16:9 range); the extra-large corner still applies but nothing masks it, since
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* an Arrangement describes items of one size and a multi-aspect row has none. Selectors use `>`
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* throughout, matching carousel.css, so a carousel nested inside an item never inherits its
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* parent's layout rules.
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*
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* The label's ink is a literal `white`, not a role: it sits over `--md-sys-color-scrim`, which is
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* black in every scheme, theme and contrast level, so white is the one ink that always has the
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* scrim's contrast — a role (`inverse-on-surface`) is dark ink in a dark scheme and fails there
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* (C-25, deliberately kept, as the component's original header explained).
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*/
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@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
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@layer material.components {
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[data-md-carousel-item] {
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position: relative;
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height: 100%;
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flex-shrink: 0;
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scroll-snap-align: start;
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scroll-snap-stop: always;
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}
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[data-md-carousel-item]:focus-visible {
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outline-offset: -3px;
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}
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[data-md-carousel='full-screen'] > [data-md-carousel-scroller] > [data-md-carousel-item] {
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width: 100%;
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}
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[data-md-carousel='multi-aspect'] > [data-md-carousel-scroller] > [data-md-carousel-item] {
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width: auto;
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border-radius: var(--md-sys-shape-corner-xl);
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}
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[data-md-carousel]:not([data-md-carousel='full-screen']):not([data-md-carousel='multi-aspect']) > [data-md-carousel-scroller] > [data-md-carousel-item] {
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width: var(--material-carousel-slot);
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max-width: 100%;
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border-radius: var(--md-sys-shape-corner-xl);
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}
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[data-md-carousel-item] > [data-md-carousel-surface] {
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position: relative;
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width: 100%;
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height: 100%;
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overflow: hidden;
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background-color: var(--md-sys-color-surface-container-highest);
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color: var(--md-sys-color-on-surface);
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}
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[data-md-carousel='multi-aspect'] > [data-md-carousel-scroller] > [data-md-carousel-item] > [data-md-carousel-surface] {
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border-radius: var(--md-sys-shape-corner-xl);
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}
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[data-md-carousel]:not([data-md-carousel='full-screen']):not([data-md-carousel='multi-aspect']) > [data-md-carousel-scroller] > [data-md-carousel-item] > [data-md-carousel-surface] {
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border-radius: var(--md-sys-shape-corner-xl);
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translate: var(--material-carousel-shift) 0;
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clip-path: inset(0 var(--material-carousel-inset, 0px) round var(--md-sys-shape-corner-xl));
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}
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[data-md-carousel-surface] > [data-md-carousel-content] {
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width: 100%;
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height: 100%;
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& > img {
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width: 100%;
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height: 100%;
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object-fit: cover;
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}
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}
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[data-md-carousel-surface] > [data-md-carousel-label] {
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pointer-events: none;
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position: absolute;
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inset-inline: 0;
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bottom: 0;
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display: flex;
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padding: var(--md-sys-measurement-space500) var(--md-sys-measurement-space200) var(--md-sys-measurement-space200);
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background: linear-gradient(to top, color-mix(in srgb, var(--md-sys-color-scrim) 60%, transparent), transparent);
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opacity: var(--material-carousel-label);
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}
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[data-md-carousel-label] > [data-md-carousel-label-text] {
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overflow: hidden;
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color: white;
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font: var(--md-sys-typescale-title-md);
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letter-spacing: var(--md-sys-typescale-title-md-tracking);
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text-overflow: ellipsis;
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white-space: nowrap;
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translate: var(--material-carousel-label-shift) 0;
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}
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}
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