_m3-select.scss

@use 'sass:map';
@use 'sass:list';
@use '../core/style/elevation';
@use '../core/tokens/m3-utils';
@use '../core/theming/theming';
@use '../core/tokens/m3';

// The prefix used to generate the fully qualified name for tokens in this file.
$prefix: (mat, select);

/// Generates custom tokens for the mat-select.
/// @param {String} $color-variant The color variant to use for the component
@function get-tokens($theme: m3.$sys-theme, $color-variant: null) {
  $system: m3-utils.get-system($theme);
  @if $color-variant {
    $system: m3-utils.replace-colors-with-variant($system, primary, $color-variant);
  }

  @return (
    base: (
      select-container-elevation-shadow: elevation.get-box-shadow(2),
      select-divider-bottom-spacing: 8px,
      select-divider-top-spacing: 8px
    ),
    color: (
      select-panel-background-color: map.get($system, surface-container),
      select-enabled-trigger-text-color: map.get($system, on-surface),
      select-disabled-trigger-text-color:
          m3-utils.color-with-opacity(map.get($system, on-surface), 38%),
      select-placeholder-text-color: map.get($system, on-surface-variant),
      select-enabled-arrow-color: map.get($system, on-surface-variant),
      select-disabled-arrow-color:
          m3-utils.color-with-opacity(map.get($system, on-surface), 38%),
      select-focused-arrow-color: map.get($system, primary),
      select-invalid-arrow-color: map.get($system, error),
    ),
    typography: (
      select-trigger-text-font: map.get($system, body-large-font),
      select-trigger-text-line-height: map.get($system, body-large-line-height),
      select-trigger-text-size: map.get($system, body-large-size),
      select-trigger-text-tracking: map.get($system, body-large-tracking),
      select-trigger-text-weight: map.get($system, body-large-weight),
    ),
    density: get-density-tokens(map.get($system, density-scale)),
  );
}

// Tokens that can be configured through Angular Material's density theming API.
@function get-density-tokens($scale) {
  $scale: theming.clamp-density($scale, -2);
  $index: ($scale * -1) + 1;

  @return (
    select-arrow-transform: list.nth((translateY(-8px), translateY(-8px), none), $index),
  );
}