Andreas Reinhold / reiniandClaude Opus 5
b1fc0c9cfa
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tests / browser (chrome, chromium) (push) Successful in 3m55s
tests / browser (firefox, firefox) (push) Successful in 5m34s
tests / lint (push) Successful in 1m5s
tests / browser (safari, webkit) (push) Successful in 5m54s
Connected segments and split halves wrote their full corners as --md-sys-shape-corner-full, 9999px, beside 8px inner corners on the same element. A box whose radii add up to more than its side has every radius scaled by one factor, so the inner corners shrank to a hundredth of a pixel and drew square. Full is now half the size's height (--group-full), which no side can overflow. A browser test fails on any radius in a group or split button larger than half its height. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01RHoXZSHc8gGpZjFmA5fPc2
92 lines
4.2 KiB
CSS
92 lines
4.2 KiB
CSS
/*
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* Button groups and split buttons: shapes that depend on a button's place among its siblings.
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*
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* Unlayered on purpose. Each <x-button> draws its own corners and padding as utilities, and a
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* rule in any @layer loses to a utility whatever its specificity; the group has to win.
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*
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* Standard group (`<x-button-group>`): pressing a label button widens it and narrows its
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* neighbours by the same amount, so the row keeps its length — Expressive's press expansion
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* (ButtonGroupDefaults.ExpandedRatio is 15%; this uses a fixed step per size). Icon buttons keep
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* their width.
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*
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* Connected group (`<x-button-group connected>`, `<x-group>`): 2px apart, the outer corners
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* full, the inner corners small, smaller still while pressed, and a selected segment fully round
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* (ConnectedButtonGroupSmallTokens and the M3 Expressive connected button group spec).
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*
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* Split button (`<x-split-button>`): the same idea for two halves; the trailing half turns
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* round and its chevron turns over while its menu is open (SplitButton*Tokens).
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*
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* "Full" here is half the size's height (`--group-full`), never `--md-sys-shape-corner-full`'s
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* 9999px. One element mixes full outer corners with small inner ones, and when a box's radii
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* add up to more than its side, CSS scales every radius by the same factor: a 9999px corner
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* beside an 8px one shrank the 8px one to a hundredth of a pixel, so the inner corners drew
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* square.
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*/
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[data-button-group] {
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--group-inner: var(--md-sys-shape-corner-sm);
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--group-inner-pressed: var(--md-sys-shape-corner-xs);
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--group-full: 1.25rem;
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}
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[data-button-group][data-size='xs'] { --group-pad: 0.75rem; --group-grow: 4px; --group-inner: var(--md-sys-shape-corner-xs); --group-inner-pressed: 2px; --group-full: 1rem; }
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[data-button-group][data-size='sm'] { --group-pad: 1rem; --group-grow: 6px; --group-full: 1.25rem; }
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[data-button-group][data-size='md'] { --group-pad: 1.5rem; --group-grow: 8px; --group-full: 1.75rem; }
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[data-button-group][data-size='lg'] { --group-pad: 3rem; --group-grow: 16px; --group-inner: var(--md-sys-shape-corner-lg); --group-inner-pressed: var(--md-sys-shape-corner-md); --group-full: 3rem; }
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[data-button-group][data-size='xl'] { --group-pad: 4rem; --group-grow: 20px; --group-inner: var(--md-sys-shape-corner-lg-increased); --group-inner-pressed: var(--md-sys-shape-corner-lg); --group-full: 4.25rem; }
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[data-button-group='standard'] > :not([data-icon-button]):active:not(:disabled, [aria-disabled='true']) {
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padding-inline: calc(var(--group-pad) + var(--group-grow));
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}
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[data-button-group='standard'] > :not([data-icon-button]):has(+ :not([data-icon-button]):active:not(:disabled, [aria-disabled='true'])) {
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padding-inline-end: calc(var(--group-pad) - var(--group-grow));
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}
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[data-button-group='standard'] > :not([data-icon-button]):active:not(:disabled, [aria-disabled='true']) + :not([data-icon-button]) {
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padding-inline-start: calc(var(--group-pad) - var(--group-grow));
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}
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/*
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* Connected segments and split halves take their inner corner from `--group-corner`, so pressing
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* or selecting changes one variable and the rounded outer corners stay put.
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*/
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[data-button-group='connected'] > *,
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[data-split] {
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--group-corner: var(--group-inner);
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border-start-start-radius: var(--group-corner);
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border-end-start-radius: var(--group-corner);
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border-start-end-radius: var(--group-corner);
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border-end-end-radius: var(--group-corner);
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}
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[data-button-group='connected'] > :active,
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[data-split]:active {
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--group-corner: var(--group-inner-pressed);
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}
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[data-button-group='connected'] > :is([aria-pressed='true'], :has(:checked)),
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[data-split='trailing'][aria-expanded='true'] {
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--group-corner: var(--group-full);
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}
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[data-button-group='connected'] > :first-child,
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[data-split='leading'] {
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border-start-start-radius: var(--group-full);
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border-end-start-radius: var(--group-full);
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}
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[data-button-group='connected'] > :last-child,
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[data-split='trailing'] {
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border-start-end-radius: var(--group-full);
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border-end-end-radius: var(--group-full);
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}
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[data-split='trailing'] svg {
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transition: rotate var(--md-sys-motion-spatial-fast-duration) var(--md-sys-motion-spatial-fast);
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}
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[data-split='trailing'][aria-expanded='true'] svg {
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rotate: 180deg;
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}
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