Toggle Group

import { customElement } from 'lit/decorators.js';
import ToggleGroup from 'slab-elements/toggle-group.js';
import styles from './toggle-group.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-toggle-group': StyledToggleGroup;
  }
}

/**
 * Toggle Group, styled: a raised row of buttons joined by ink rules.
 */
@customElement('slab-styled-toggle-group')
export default class StyledToggleGroup extends ToggleGroup {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

/*
  The row and the rules between its buttons. The buttons style themselves.
*/
export default css`
  [part~='group'] {
    background-color: var(--paper);
    border: var(--border);
    box-shadow: var(--shadow);
    display: flex;
    inline-size: fit-content;
  }

  :host([orientation='vertical']) [part~='group'] {
    flex-direction: column;
  }

  /* An ink rule between each pair, across the row or down the column. */
  ::slotted(:not(:first-child)) {
    border-inline-start: var(--border);
  }

  :host([orientation='vertical']) ::slotted(:not(:first-child)) {
    border-block-start: var(--border);
    border-inline-start: 0;
  }
`;

import { customElement } from 'lit/decorators.js';
import ToggleGroupButton from 'slab-elements/toggle-group.button.js';
import styles from './toggle-group.button.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-toggle-group-button': StyledToggleGroupButton;
  }
}

/**
 * Toggle Group Button, styled: uppercase slab type, filled in ember when it's
 * pressed.
 */
@customElement('slab-styled-toggle-group-button')
export default class StyledToggleGroupButton extends ToggleGroupButton {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

export default css`
  :host {
    color: var(--ink);
    cursor: pointer;
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.875rem;
    text-transform: uppercase;
    transition:
      background-color 100ms,
      color 100ms;
  }

  :host(:hover) {
    background-color: var(--chalk);
  }

  /*
    Inside the group's border rather than over it, so the ring isn't cut off
    by the buttons on either side.
  */
  :host(:focus-visible) {
    outline: 3px solid var(--ember);
    outline-offset: -5px;
  }

  /*
    As specific as the hover above, and after it, so a pressed button keeps
    its ember while it's hovered. Paper text on "--ember-deep" is 5.7:1 and
    7.4:1, where on "--ember" it would fall short for small text.
  */
  :host(:state(pressed)) {
    background-color: var(--ember-deep);
    color: var(--paper);
  }

  :host(:state(pressed):focus-visible) {
    outline-color: var(--paper);
  }

  :host(:state(disabled)) {
    background-color: transparent;
    color: var(--ash);
    cursor: not-allowed;
    text-decoration: line-through;
  }

  @media (prefers-reduced-motion: reduce) {
    :host {
      transition: none;
    }
  }
`;

import { css } from 'lit';

/*
  The styled components' palette and type, taken from the logo: ink for the
  courses, ember for the base, paper behind them.

  Each is a short alias for a "--slab-styled-*" property, with the default as
  its fallback. Retheming is "--slab-styled-ember" and the rest on ":root",
  which every shadow root inherits. Were the defaults declared under those
  names here instead, each host's own declaration would shadow the page's.

  Each default is "light-dark()", so the components follow the page's
  "color-scheme": "dark" for dark, "light" for light, and "light dark" to
  follow the operating system. Ink and paper trade places in the dark, so
  ink is always the text and paper always what's behind it. Contrast is given
  as light, then dark.
*/
export default css`
  :host {
    /* Secondary text. 6.8:1 and 6.9:1 on paper. */
    --ash: var(--slab-styled-ash, light-dark(#5e5a55, #a8a19a));
    --border: 2px solid var(--ink);

    /* Behind disabled and read-only controls, and hovered rows. */
    --chalk: var(--slab-styled-chalk, light-dark(#f4f1ec, #2b2926));

    /*
      The logo's orange, brighter in the dark. 4.25:1 and 5.2:1 on paper is
      enough for borders, fills and large text, but not always for small text,
      which takes "--ember-deep".
    */
    --ember: var(--slab-styled-ember, light-dark(#d9492a, #ec5f3b));

    /*
      Orange for small text on paper, and for paper text on it. 5.7:1 and
      7.4:1.
    */
    --ember-deep: var(--slab-styled-ember-deep, light-dark(#b3381a, #ff8566));
    --font-body: var(
      --slab-styled-font-body,
      'IBM Plex Sans',
      system-ui,
      sans-serif
    );
    --font-display: var(
      --slab-styled-font-display,
      'Zilla Slab',
      rockwell,
      'Roboto Slab',
      serif
    );
    --font-mono: var(
      --slab-styled-font-mono,
      'IBM Plex Mono',
      ui-monospace,
      monospace
    );
    --ink: var(--slab-styled-ink, light-dark(#1c1c1c, #f4f1ec));
    --paper: var(--slab-styled-paper, light-dark(#fff, #1a1918));

    /* The hard, offset shadow a raised surface casts. */
    --shadow: 4px 4px 0 var(--ink);
  }
`;