Meter

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

declare global {
  interface HTMLElementTagNameMap {
    'slab-styled-meter': StyledMeter;
  }
}

/**
 * Meter, styled: Progress's bar, solid rather than in bricks. Ink while the
 * value is in the optimum region, ember outside it, and hatched deep ember
 * when it's furthest from it.
 */
@customElement('slab-styled-meter')
export default class StyledMeter extends Meter {
  static override styles = [tokens, styles];
}

import { css } from 'lit';

/*
  Chromium and WebKit draw each region's value with a pseudo-element of its
  own. Firefox has one, which takes its color from Meter's states.
*/
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~='meter'] {
    appearance: none;
    background: var(--paper);
    block-size: 1.375rem;
    border: var(--border);
    box-sizing: border-box;
    inline-size: 100%;
    padding: 2px;

    /*
      The bar keeps its own height otherwise, a line or so, rather than
      filling the meter's.
    */
    &::-webkit-meter-inner-element {
      block-size: 100%;
      display: flex;
    }

    &::-webkit-meter-bar {
      background: transparent;
      border: 0;
      border-radius: 0;
      flex-grow: 1;
    }

    &::-webkit-meter-optimum-value,
    &::-webkit-meter-suboptimum-value,
    &::-webkit-meter-even-less-good-value {
      block-size: 100%;
    }

    &::-webkit-meter-optimum-value {
      background: var(--ink);
    }

    &::-webkit-meter-suboptimum-value {
      background: var(--ember);
    }

    &::-webkit-meter-even-less-good-value {
      background: repeating-linear-gradient(
        -45deg,
        var(--ember-deep) 0 0.375rem,
        var(--ember) 0.375rem 0.75rem
      );
    }

    &::-moz-meter-bar {
      background: var(--ink);
    }
  }

  :host(:state(suboptimum)) [part~='meter']::-moz-meter-bar {
    background: var(--ember);
  }

  :host(:state(even-less-good)) [part~='meter']::-moz-meter-bar {
    background: repeating-linear-gradient(
      -45deg,
      var(--ember-deep) 0 0.375rem,
      var(--ember) 0.375rem 0.75rem
    );
  }
`;

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);
  }
`;