Andreas ReinholdandClaude Opus 5
e4de067350
An <x-group> segment is a plain label, 32px or 40px tall, with nothing reaching past it, and nothing gave a connected <x-button-group> its 48dp minimum width either — both numbers M3 names and tells you not to reduce. The segment now carries the shared `touch-target` utility and a 48px floor, and groups.css puts the floor on the buttons a caller nests in a connected group. <x-button> drops its hand-rolled ::after for the same utility. Plan step 11, actions.md ACT-05. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
104 lines
4.7 KiB
CSS
104 lines
4.7 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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* A connected segment at the two smallest sizes is 32px or 40px tall, and an icon-only one is as
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* narrow as it is tall. M3 names both numbers and tells you not to reduce them: "XS and S
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* connected button groups have a 48dp target area and a 48dp minimum width". The target is the
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* `touch-target` utility on the segment itself; the width is here, where a group can reach the
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* `<x-button>`s a caller put inside it.
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*/
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[data-button-group='connected'][data-size='xs'] > *,
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[data-button-group='connected'][data-size='sm'] > * {
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min-inline-size: 3rem;
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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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