Plan step 46, M3 § Tabs: "Labels: single row by default; may wrap to a max second line if needed with truncation, or use scrollable tabs to give longer titles more room." In fixed tabs (<x-tabs>, <x-section-nav> up to four sections) the label's text, now its own data-md-tab-text in both views, wraps and truncates at two lines. The tab's 48px (64px stacked) is a minimum, the bar stretches its tabs to one height, and the content stretches with them, so the indicator stays on the divider. Scrollable tabs keep one row. SealShare's "Two-Factor Auth" and "Appearance" showed an ellipsis at 600px. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
240 lines
9.3 KiB
CSS
240 lines
9.3 KiB
CSS
/*
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* `<x-tabs>`, `<x-tab>`: M3's tabs (PrimaryNavigationTabTokens.kt, SecondaryNavigationTabTokens.kt,
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* androidx Compose Material 3, Apache-2.0; docs/reference/m3/components-navigation-selection-inputs.md
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* § Tabs) — a tablist of tabs at least 48px tall on the surface over an outline-variant divider
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* (64px when a primary tab stacks its icon over its label), title-small labels in on-surface-variant, the chosen tab's in
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* primary (primary tabs) or on-surface (secondary tabs).
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*
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* [data-md-tabs] min-width: 0
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* [data-md-tabs-bar] role="tablist"; data-md-variant, data-md-stacked,
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* data-md-scrollable
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* [data-md-tab] role="tab"
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* [data-md-tab-content] [data-md-icon] (optional), [data-md-tab-label],
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* [data-md-tab-indicator]
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* [data-md-tab-label] [data-md-tab-text], [data-md-badge] (optional)
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* [data-md-tab-panel] role="tabpanel", hidden server-side until chosen (N-05)
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*
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* "Labels: single row by default; may wrap to a max second line if needed with truncation, or use
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* scrollable tabs to give longer titles more room" (§ Tabs, "Behaviour and guidelines"). A fixed
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* tab shares the row equally, so its label keeps one row while it fits its share, then wraps to a
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* second line and truncates that one with an ellipsis. 48px (64px stacked) is the tab's minimum,
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* not its height: the tab grows to hold the second line, and the bar's flex row stretches every
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* tab to the tallest, so the tabs keep one height, each content box fills its tab, and every
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* indicator stays on the divider under its tab's content. A scrollable tab is as wide as its label
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* and keeps it on one row, the room M3 gives longer titles instead.
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*
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* The active indicator is drawn in every tab and shown under the chosen one, so it is right before
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* Alpine starts and after a morph: 3px with rounded top corners under the content of a primary tab
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* (at least 24px wide, inset 2px at each side — N-18), 2px across the whole of a secondary one.
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* When the choice changes, a view transition moves it from the old tab to the new (resources/js/tabs.js),
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* as M3's slides.
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*
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* The bar scrolls sideways, so it clips whatever leaves it — including the focus ring, which the
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* rest of the package draws 3px thick 2px outside the element (tokens/state.css). `--tabs-ring` is
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* the room that takes: the bar carries it as padding on every side, and the state layer and the
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* indicator reach back out into it, so the divider still sits against the tabs and the indicator
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* still sits on the divider (N-20). That makes the bar 10px taller than M3's 48px tab. A scrollable
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* set's first tab is offset 52dp from the leading edge, so it reads as scrollable (N-10). A link
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* marked `aria-current="page"` (`<x-section-nav>`'s tabs) takes the active indicator and colour
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* exactly as `aria-selected="true"` does (N-21).
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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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@import './icon.css';
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@import './badge.css';
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@layer material.components {
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[data-md-tabs] {
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min-width: 0;
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}
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[data-md-tabs-bar] {
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--tabs-ring: 5px;
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position: relative;
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display: flex;
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overflow-x: auto;
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overscroll-behavior-x: contain;
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padding: var(--tabs-ring);
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scroll-padding-inline: var(--tabs-ring);
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border-bottom: 1px solid var(--md-sys-color-outline-variant);
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scrollbar-width: thin;
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}
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/* "Offset the first scrollable tab 52dp from the leading edge so it's clear that more content
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is available" (N-10). Logical, so a right-to-left page mirrors it. */
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[data-md-tabs-bar][data-md-scrollable] {
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padding-inline-start: 52px;
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scroll-padding-inline-start: 52px;
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}
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/* A section nav's links sit in list items that share the width. */
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[data-md-tabs-bar] > li {
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flex: 1 1 0%;
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}
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[data-md-tabs-bar] > li > [data-md-tab] {
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flex: 1 1 0%;
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}
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[data-md-tab] {
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position: relative;
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display: flex;
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flex: 1 1 0%;
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min-width: 90px;
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min-height: 48px;
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align-items: center;
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justify-content: center;
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padding-inline: var(--md-sys-measurement-space200);
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color: var(--md-sys-color-on-surface-variant);
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cursor: pointer;
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outline: none;
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font: var(--md-sys-typescale-title-sm);
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letter-spacing: var(--md-sys-typescale-title-sm-tracking);
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white-space: nowrap;
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transition-property: color;
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transition-duration: var(--md-sys-motion-effects-fast-duration);
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transition-timing-function: var(--md-sys-motion-effects-fast);
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}
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[data-md-tabs-bar][data-md-scrollable] > li,
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[data-md-tabs-bar][data-md-scrollable] [data-md-tab] {
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flex: none;
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}
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[data-md-tabs-bar][data-md-stacked] [data-md-tab] {
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min-height: 64px;
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}
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/* The state layer covers the tab and the ring's room around it, so the wash meets the divider. */
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[data-md-tab]::before {
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content: '';
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position: absolute;
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inset-block: calc(-1 * var(--tabs-ring));
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inset-inline: 0;
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pointer-events: none;
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transition-property: background-color;
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transition-duration: var(--md-sys-motion-effects-fast-duration);
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transition-timing-function: var(--md-sys-motion-effects-fast);
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}
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@media (hover: hover) {
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[data-md-tab]:hover {
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color: var(--md-sys-color-on-surface);
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}
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[data-md-tab]:hover::before {
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background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 8%, transparent);
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}
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}
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[data-md-tab]:focus-visible::before,
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[data-md-tab]:active::before {
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background-color: color-mix(in srgb, var(--md-sys-color-on-surface) 10%, transparent);
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}
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[data-md-tab]:focus-visible {
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color: var(--md-sys-color-on-surface);
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outline: 3px solid var(--md-sys-color-secondary);
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outline-offset: 2px;
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}
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/* A link-based bar marks the page with aria-current, not aria-selected; both are the chosen
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tab, and both take the variant's active colour (N-21). */
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[data-md-tab]:is([aria-selected='true'], [aria-current='page']) {
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color: var(--md-sys-color-primary);
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}
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[data-md-tabs-bar][data-md-variant='secondary'] [data-md-tab]:is([aria-selected='true'], [aria-current='page']) {
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color: var(--md-sys-color-on-surface);
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}
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[data-md-tab]:disabled {
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color: color-mix(in srgb, var(--md-sys-color-on-surface) 38%, transparent);
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cursor: default;
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}
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[data-md-tab]:disabled::before {
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background-color: transparent;
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}
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/* Stretched rather than 100% tall, so it fills a tab that grew past its minimum too, and the
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primary indicator at its foot lands on the divider in every tab of the bar. */
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[data-md-tab-content] {
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position: relative;
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display: inline-flex;
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align-self: stretch;
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min-width: 24px;
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align-items: center;
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justify-content: center;
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gap: var(--md-sys-measurement-space100);
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}
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[data-md-tabs-bar][data-md-stacked] [data-md-tab-content] {
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flex-direction: column;
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gap: var(--md-sys-measurement-space25);
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}
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[data-md-tab-label] {
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display: inline-flex;
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min-width: 0;
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align-items: center;
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gap: var(--md-sys-measurement-space75);
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}
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/* A fixed tab's label: one row while it fits, then a second, truncated (the M3 line above).
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The tab's own nowrap still holds the badge and a scrollable tab's label to one row. */
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[data-md-tabs-bar]:not([data-md-scrollable]) [data-md-tab-text] {
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display: -webkit-box;
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min-width: 0;
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overflow: hidden;
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-webkit-box-orient: vertical;
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-webkit-line-clamp: 2;
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text-align: center;
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text-overflow: ellipsis;
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white-space: normal;
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}
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/* Primary indicators are inset 2dp at each side (N-18); both variants sit on the divider, which
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the ring's room has pushed below the tab. */
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[data-md-tab-indicator] {
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position: absolute;
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inset-inline: 2px;
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bottom: calc(-1 * var(--tabs-ring));
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height: 3px;
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border-radius: 3px 3px 0 0;
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background-color: var(--md-sys-color-primary);
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opacity: 0;
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pointer-events: none;
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view-transition-class: material-tab-indicator;
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}
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/* A secondary tab's indicator spans the tab, not its content. */
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[data-md-tabs-bar][data-md-variant='secondary'] [data-md-tab-content] {
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position: static;
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}
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[data-md-tabs-bar][data-md-variant='secondary'] [data-md-tab-indicator] {
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inset-inline: 0;
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height: 2px;
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border-radius: 0;
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}
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[data-md-tab]:is([aria-selected='true'], [aria-current='page']) [data-md-tab-indicator] {
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opacity: 1;
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view-transition-name: var(--tabs-indicator);
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}
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/* pt-6, before the rewrite: the panel's content stands clear of the bar above it. */
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[data-md-tab-panel] {
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padding-top: var(--md-sys-measurement-space300);
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outline: none;
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}
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::view-transition-group(*.material-tab-indicator) {
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animation-duration: var(--md-sys-motion-spatial-default-duration);
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animation-timing-function: var(--md-sys-motion-spatial-default);
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}
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}
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