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Draw the badge without Tailwind

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Plan step 36. <x-badge> renders data-md-badge with data-md-dot,
data-md-variant (solid, tonal or outline, resolved in that order),
data-md-color and data-md-floating; badge.css draws BadgeTokens' dot and
count, the status label, each colour's pair of roles through custom
properties, and M3's anchor geometry when floating. A plain badge sets
no colour, so the caller's CSS paints it.

NavigationBarTest (navigation group) asserts the dot by data-md-dot.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
This commit is contained in:
Andreas Reinhold / reini
2026-09-14 14:34:24 +02:00
co-authored by Claude Opus 5
parent d4b71c519c
commit 7bdd3ef61c
6 changed files with 287 additions and 100 deletions
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resources/css/components/badge.css
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/*
* <x-badge>: M3's small and large badges, and the library's status label.
*
* BadgeTokens (androidx Compose Material 3, Apache-2.0): the small badge is a 6px dot
* (`data-md-dot`), the large badge 16px tall and at least 16px wide with 4px either side of a
* `label-small` count in tabular figures, both fully round and `error` by default. A floating
* badge sits on M3's anchor geometry at the top-end corner of its `position: relative` parent: the
* dot flush in the corner, the count 2px above it with its start 12px in from the parent's end.
*
* The status label (`data-md-variant`) is not an M3 badge: 24px tall, small corner, 8px either
* side, 4px between an icon and its word, `label-medium`. `tonal` draws it in the colour's
* container, `solid` in the colour itself, `outline` as a 1px `outline` edge around
* `on-surface-variant` text — `outline` rather than `outline-variant`, because M3 asks a badge for
* 3:1 against what is behind it and `outline-variant` is the decorative role dividers use.
*
* `data-md-color` picks the pair of roles; `neutral` has no hue of its own (`on-surface-variant`
* and `surface`, or `surface-container-high` behind `on-surface-variant` text), and `plain` sets
* no colour at all, so the caller's CSS paints it.
*/
@layer material.reset, material.tokens, material.base, material.layout, material.components, material.text, material.visibility;
@layer material.components {
[data-md-badge] {
--md-badge-color: var(--md-sys-color-error);
--md-badge-on-color: var(--md-sys-color-on-error);
--md-badge-container: var(--md-sys-color-error-container);
--md-badge-on-container: var(--md-sys-color-on-error-container);
display: inline-flex;
flex-shrink: 0;
align-items: center;
justify-content: center;
white-space: nowrap;
}
[data-md-badge][data-md-dot] {
inline-size: 6px;
block-size: 6px;
border-radius: var(--md-sys-shape-corner-full);
}
[data-md-badge]:not([data-md-dot], [data-md-variant]) {
min-inline-size: 16px;
block-size: 16px;
border-radius: var(--md-sys-shape-corner-full);
padding-inline: var(--md-sys-measurement-space50);
font: var(--md-sys-typescale-label-sm);
letter-spacing: var(--md-sys-typescale-label-sm-tracking);
font-variation-settings: normal;
font-variant-numeric: tabular-nums;
}
[data-md-badge][data-md-variant] {
gap: var(--md-sys-measurement-space50);
block-size: 24px;
border-radius: var(--md-sys-shape-corner-sm);
padding-inline: var(--md-sys-measurement-space100);
font: var(--md-sys-typescale-label-md);
letter-spacing: var(--md-sys-typescale-label-md-tracking);
font-variation-settings: normal;
}
[data-md-badge][data-md-variant='outline'] {
border: 1px solid;
}
[data-md-badge][data-md-color='primary'] {
--md-badge-color: var(--md-sys-color-primary);
--md-badge-on-color: var(--md-sys-color-on-primary);
--md-badge-container: var(--md-sys-color-primary-container);
--md-badge-on-container: var(--md-sys-color-on-primary-container);
}
[data-md-badge][data-md-color='secondary'] {
--md-badge-color: var(--md-sys-color-secondary);
--md-badge-on-color: var(--md-sys-color-on-secondary);
--md-badge-container: var(--md-sys-color-secondary-container);
--md-badge-on-container: var(--md-sys-color-on-secondary-container);
}
[data-md-badge][data-md-color='tertiary'] {
--md-badge-color: var(--md-sys-color-tertiary);
--md-badge-on-color: var(--md-sys-color-on-tertiary);
--md-badge-container: var(--md-sys-color-tertiary-container);
--md-badge-on-container: var(--md-sys-color-on-tertiary-container);
}
[data-md-badge][data-md-color='success'] {
--md-badge-color: var(--md-sys-color-success);
--md-badge-on-color: var(--md-sys-color-on-success);
--md-badge-container: var(--md-sys-color-success-container);
--md-badge-on-container: var(--md-sys-color-on-success-container);
}
[data-md-badge][data-md-color='warning'] {
--md-badge-color: var(--md-sys-color-warning);
--md-badge-on-color: var(--md-sys-color-on-warning);
--md-badge-container: var(--md-sys-color-warning-container);
--md-badge-on-container: var(--md-sys-color-on-warning-container);
}
[data-md-badge][data-md-color='info'] {
--md-badge-color: var(--md-sys-color-info);
--md-badge-on-color: var(--md-sys-color-on-info);
--md-badge-container: var(--md-sys-color-info-container);
--md-badge-on-container: var(--md-sys-color-on-info-container);
}
[data-md-badge][data-md-color='neutral'] {
--md-badge-color: var(--md-sys-color-on-surface-variant);
--md-badge-on-color: var(--md-sys-color-surface);
--md-badge-container: var(--md-sys-color-surface-container-high);
--md-badge-on-container: var(--md-sys-color-on-surface-variant);
}
[data-md-badge]:not([data-md-color='plain']) {
background-color: var(--md-badge-color);
color: var(--md-badge-on-color);
&[data-md-variant='tonal'] {
background-color: var(--md-badge-container);
color: var(--md-badge-on-container);
}
&[data-md-variant='outline'] {
border-color: var(--md-sys-color-outline);
background-color: transparent;
color: var(--md-sys-color-on-surface-variant);
}
}
[data-md-badge][data-md-floating] {
position: absolute;
inset-block-start: calc(-1 * var(--md-sys-measurement-space25));
inset-inline-start: calc(100% - 12px);
}
[data-md-badge][data-md-floating][data-md-dot] {
inset-block-start: 0;
inset-inline: auto 0;
}
}