fc-dioxus 0.1.1

Typed, accessible Dioxus components over future-css
Documentation 
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/*!
 * future-css -- https://github.com/estith/future-css
 * A styling system for multi-language, multi-platform systems
 *
 * Regenerate with: npm run build
 * This file is generated; edit the sources in src/ instead.
 */
/*!
 * future-css -- slider
 *
 * A value picked from a range by dragging: temperature, volume, a top-p.
 * Built on `<input type="range">`, so keyboard (arrows, Page Up/Down, Home,
 * End), the slider role, `aria-valuenow`, and form submission all come from
 * the platform:
 *
 *   <div class="fc-slider">
 *     <input class="fc-slider__input" type="range" id="temp"
 *            min="0" max="2" step="0.1" value="0.7" aria-labelledby="temp-label">
 *     <output class="fc-slider__value" for="temp">0.7</output>
 *     <ol class="fc-slider__marks" aria-hidden="true"><li>0</li><li>1</li><li>2</li></ol>
 *   </div>
 *
 * The filled part of the track is drawn from `--fc-slider-pct`, which the
 * `slider` binding sets on input (Firefox draws it natively). Without the
 * binding the track is unfilled and the thumb alone shows the value, which is
 * complete information, just less of it.
 *
 * Marks are a visible scale, hidden from assistive technology because the
 * input already announces its value; `<datalist>` would be the semantic form,
 * but no engine renders one under a styled range.
 */

@layer fc.components {
  .fc-slider {
    --fc-slider-thumb: 1.25rem;
    --fc-slider-track: 0.375rem;
    /* Both declared as 3:1 boundaries against a surface (WCAG 1.4.11): the
       checked-control colour and the off-switch track. */
    --fc-slider-fill: var(--fc-color-accent-border);
    --fc-slider-rest: var(--fc-color-border-strong);

    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: var(--fc-space-3);
    max-inline-size: 100%;
  }

  .fc-slider__input {
    -webkit-appearance: none;
    appearance: none;
    inline-size: 100%;
    /* The input box is the hit target, taller than the track it draws. */
    block-size: var(--fc-size-target-comfortable);
    margin: 0;
    padding: 0;
    /* The base layer draws a field border on inputs; a range has no field. */
    border: 0;
    background: transparent;
    cursor: pointer;
    touch-action: pan-y;
  }

  /*
   * The track. A gradient with a hard stop at the value: filled before it,
   * rest after. The direction is physical because the browser fills a range
   * from the left in LTR and from the right in RTL; the :dir(rtl) branch
   * below follows it.
   */
  .fc-slider__input::-webkit-slider-runnable-track {
    block-size: var(--fc-slider-track);
    border-radius: var(--fc-radius-full);
    background: linear-gradient(to right, var(--fc-slider-fill) var(--fc-slider-pct, 0%), var(--fc-slider-rest) var(--fc-slider-pct, 0%));
  }

  .fc-slider__input:dir(rtl)::-webkit-slider-runnable-track {
    background: linear-gradient(to left, var(--fc-slider-fill) var(--fc-slider-pct, 0%), var(--fc-slider-rest) var(--fc-slider-pct, 0%));
  }

  .fc-slider__input::-moz-range-track {
    block-size: var(--fc-slider-track);
    border-radius: var(--fc-radius-full);
    background-color: var(--fc-slider-rest);
  }

  .fc-slider__input::-moz-range-progress {
    block-size: var(--fc-slider-track);
    border-radius: var(--fc-radius-full);
    background-color: var(--fc-slider-fill);
  }

  /*
   * The thumb carries a ring of the surface colour, so it stays distinct from
   * the filled track it sits on.
   */
  .fc-slider__input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    inline-size: var(--fc-slider-thumb);
    block-size: var(--fc-slider-thumb);
    margin-block-start: calc((var(--fc-slider-track) - var(--fc-slider-thumb)) / 2);
    background-color: var(--fc-slider-fill);
    border: var(--fc-border-width-thick) solid var(--fc-color-bg-surface);
    border-radius: var(--fc-radius-full);
    box-shadow: var(--fc-shadow-raised);
    transition: scale var(--fc-duration-fast) var(--fc-easing-standard);
  }

  .fc-slider__input::-moz-range-thumb {
    inline-size: var(--fc-slider-thumb);
    block-size: var(--fc-slider-thumb);
    background-color: var(--fc-slider-fill);
    border: var(--fc-border-width-thick) solid var(--fc-color-bg-surface);
    border-radius: var(--fc-radius-full);
    box-shadow: var(--fc-shadow-raised);
  }

  @media (hover: hover) {
    .fc-slider__input:hover {
      --fc-slider-fill: var(--fc-color-accent-bg-hover);
    }
  }

  /* Dragging enlarges the thumb, so it stays visible under a fingertip. */
  .fc-slider__input:active::-webkit-slider-thumb {
    scale: 1.15;
  }

  .fc-slider__input:active {
    --fc-slider-fill: var(--fc-color-accent-bg-active);
  }

  .fc-slider__input:disabled {
    --fc-slider-fill: var(--fc-color-disabled-fg);
    --fc-slider-rest: var(--fc-color-disabled-border);
    cursor: not-allowed;
  }

  .fc-slider__input[aria-invalid="true"] {
    --fc-slider-fill: var(--fc-color-danger-bg);
  }

  .fc-slider__value {
    min-inline-size: 3ch;
    color: var(--fc-color-text-default);
    font-size: var(--fc-font-size-sm);
    font-variant-numeric: tabular-nums;
    text-align: end;
  }

  /*
   * Inset by half a thumb on each side, which is where the browser puts the
   * track's ends, so the first and last marks sit under the thumb's extremes.
   */
  .fc-slider__marks {
    display: flex;
    grid-column: 1;
    justify-content: space-between;
    margin: 0;
    padding: 0;
    padding-inline: calc(var(--fc-slider-thumb) / 2);
    list-style: none;
    color: var(--fc-color-text-muted);
    font-size: var(--fc-font-size-xs);
    font-variant-numeric: tabular-nums;
  }

  /* Each mark is centred on its point rather than starting at it. */
  .fc-slider__marks > li {
    inline-size: 0;
    display: flex;
    justify-content: center;
    white-space: nowrap;
  }

  /*
   * Reduced motion: the thumb does not grow. The reset zeroes the duration, so
   * the growth would jump; the larger thumb is not needed to see it either.
   */
  @media (prefers-reduced-motion: reduce) {
    .fc-slider__input:active::-webkit-slider-thumb {
      scale: 1;
    }
  }

  /* ---- Forced colors --------------------------------------------------- */

  /*
   * Gradients and shadows are dropped in forced colors. The track and thumb
   * are restated in system colours, so the value is still visible.
   */
  @media (forced-colors: active) {
    .fc-slider__input::-webkit-slider-runnable-track {
      background: CanvasText;
    }

    .fc-slider__input::-webkit-slider-thumb {
      background-color: Highlight;
      border-color: Canvas;
    }

    .fc-slider__input::-moz-range-track {
      background-color: CanvasText;
    }

    .fc-slider__input::-moz-range-thumb,
    .fc-slider__input::-moz-range-progress {
      background-color: Highlight;
    }

    .fc-slider__input:disabled::-webkit-slider-thumb {
      background-color: GrayText;
    }
  }
}