Progress

import { customElement } from 'lit/decorators.js';
import Progress from 'slab-elements/progress.js';
import styles from './progress.styles.js';
import tokens from './tokens.styles.js';

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-progress': StyledProgress;
  }
}

/**
 * Progress, styled: an ink-bordered bar laid with ember bricks as the task
 * goes, and bricks that march across it while how far along isn't known.
 */
@customElement('slab-styled-progress')
export default class StyledProgress extends Progress {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

/*
  The bricks are a repeating gradient: 1.5rem of ember and a 0.25rem joint of
  paper, the logo's proportions near enough.
*/
export default css`
  :host {
    color: var(--ink);
    display: grid;
    font-family: var(--font-body);
    gap: 0.5rem;
  }

  [part~='label'] {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 600;
  }

  [part~='progress'] {
    appearance: none;
    background-color: var(--paper);
    block-size: 1.375rem;
    border: var(--border);
    box-sizing: border-box;
    inline-size: 100%;
    padding: 2px;

    &::-webkit-progress-bar {
      background-color: transparent;
    }

    &::-webkit-progress-value {
      background: repeating-linear-gradient(
        to right,
        var(--ember) 0 1.5rem,
        transparent 1.5rem 1.75rem
      );
      transition: inline-size 200ms;
    }

    &::-moz-progress-bar {
      background: repeating-linear-gradient(
        to right,
        var(--ember) 0 1.5rem,
        transparent 1.5rem 1.75rem
      );
    }
  }

  /*
    The bricks are one tile, a brick and its gap, repeated across. The march
    moves them by exactly that tile, so each loop picks up where the last one
    left off. A gradient as wide as the bar would wrap at the bar's width,
    which isn't a multiple of the tile, and a brick would jump at the start.
  */
  :host(:state(indeterminate)) [part~='progress'] {
    animation: march 600ms linear infinite;
    background:
      linear-gradient(
          to right,
          var(--ember) 0 1.5rem,
          transparent 1.5rem 3.5rem
        )
        0 0 / 3.5rem 100% repeat-x content-box,
      var(--paper);

    &::-moz-progress-bar {
      background: transparent;
    }
  }

  @keyframes march {
    to {
      background-position-x: 3.5rem, 0;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    :host(:state(indeterminate)) [part~='progress'] {
      animation: none;
    }

    [part~='progress']::-webkit-progress-value {
      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);
  }
`;