mdb-ui-kit/sass/_mixins-shared.scss

// variations(unquote(""), background-color, #FFF);
@mixin variations($extra, $material-param-1, $default) {
  @include generic-variations($extra, $default, "variations-content", $material-param-1);
}

@mixin variations-content($args) {
  //@debug "#{map-get($args, mixin-name)}{ #{map-get($args, material-param-1)}: #{map-get($args, material-color)}; }";
  //@debug "#{inspect($args)}";
  //@error "break here";
  #{map-get($args, material-param-1)}: map-get($args, material-color);
}

@mixin background-variations($extra, $default) {
  @include generic-variations($extra, $default, "background-variations-content", null);
}

@mixin background-variations-content($args) {
  background-color: map-get($args, material-color);
  @if (map-get($args, material-color) == $btn-default) {
    color: $lightbg-text;
  } @else {
    color: map-get($args, material-text-color);
  }
}

@mixin text-variations($extra, $default) {
  @include generic-variations($extra, $default, "text-variations-content", null);
}

@mixin text-variations-content($args) {
  color: map-get($args, material-color);
}

@mixin button-variations($extra, $default, $material-param-1) {
  @include generic-variations($extra, $default, "button-variations-content", $material-param-1);
}

@mixin button-variations-content($args) {
  //@debug "#{inspect($args)}";
  $material-color: map-get($args, material-color);
  $material-param-1: map-get($args, material-param-1);
  $contrast-factor: map-get($args, contrast-factor);
  background-color: contrast($material-color,
          darken($material-color, $material-param-1),
          lighten($material-color, $material-param-1),
          $contrast-factor);
}

@mixin bg-color-variations($extra, $default, $material-param-1) {
  @include generic-variations($extra, $default, "bg-color-variations-content", $material-param-1);
}

@mixin bg-color-variations-content($args) {
  background-color: rgba(map-get($args, material-color), map-get($args, material-param-1));
}

// interpolation of mixin-name is not allowed evidently, so we statically include based on the mixin-name given
@mixin call-variations-content-mixin($args) {
  $mixin-name: map-get($args, mixin-name);
  @if $mixin-name == variations-content {
    @include variations-content($args);
  } @else if $mixin-name == background-variations-content {
    @include background-variations-content($args);
  } @else if $mixin-name == text-variations-content {
    @include text-variations-content($args);
  } @else if $mixin-name == button-variations-content {
    @include button-variations-content($args);
  } @else if $mixin-name == bg-color-variations-content {
    @include bg-color-variations-content($args);
  } @else {
    @error "Unknown mixin: #{$mixin-name}"
  }
}

//
// To use this mixin you should pass a function as final parameter to define
// the style. In that definition you can use the following variables to define it.
//
// $material-color-name ---> "red", "green", "indigo" ...
// $material-color-full-name ---> "red", "green-50", "indigo-400" ...
// $material-color ---> #f44336, #e8f5e9, #5c6bc0 ...
// $material-text-color ---> rgba(255,255,255,0.84), rgba(0,0,0,0.84), rgba(255,255,255,0.84) ...
//

@mixin generic-variations($extra, $default, $mixin-name, $material-param-1) {

  $contrast-factor: 40%;
  //setup map to pass parameters (instead of the incredibly long-error-prone list for each and every @include)
  $args: (
          extra: $extra,
          default: $default,
          mixin-name: $mixin-name,
          material-param-1: $material-param-1,
          contrast-factor: $contrast-factor,
  );

  // bootstrap styles
  &#{$extra}, &-default#{$extra} {

    $args-extra: map-merge($args, (
            material-color-name: "default",
            material-color-full-name: "default",
            material-color: $default,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-extra);
  }
  &-black#{$extra} {
    $args-black: map-merge($args, (
            material-color-name: "black",
            material-color-full-name: "black",
            material-color: $black,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-black);
  }
  &-white#{$extra} {
    $args-white: map-merge($args, (
            material-color-name: "white",
            material-color-full-name: "white",
            material-color: $white,
            material-text-color: $lightbg-text
    ));
    @include call-variations-content-mixin($args-white);
  }
  &-inverse#{$extra} {
    $args-inverse: map-merge($args, (
            material-color-name: "inverse",
            material-color-full-name: "inverse",
            material-color: $inverse,
            material-text-color: contrast($inverse, $lightbg-text, $darkbg-text, $contrast-factor)
    ));
    @include call-variations-content-mixin($args-inverse);
  }
  &-primary#{$extra} {
    $args-primary: map-merge($args, (
            material-color-name: "primary",
            material-color-full-name: "primary",
            material-color: $primary,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-primary);
  }
  &-success#{$extra} {
    $args-success: map-merge($args, (
            material-color-name: "success",
            material-color-full-name: "success",
            material-color: $success,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-success);
  }
  &-info#{$extra} {
    $args-info: map-merge($args, (
            material-color-name: "info",
            material-color-full-name: "info",
            material-color: $info,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-info);
  }
  &-warning#{$extra} {
    $args-warning: map-merge($args, (
            material-color-name: "warning",
            material-color-full-name: "warning",
            material-color: $warning,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-warning);
  }
  &-danger#{$extra} {
    $args-danger: map-merge($args, (
            material-color-name: "danger",
            material-color-full-name: "danger",
            material-color: $danger,
            material-text-color: $darkbg-text
    ));
    @include call-variations-content-mixin($args-danger);
  }

  @include generic-variations-colors($args)
}

@mixin generic-variations-color($args) {
  $material-color-name: map-get($args, material-color-name);
  $material-color-number: map-get($args, material-color-number);
  $material-color-full-name: "#{$material-color-name}#{$material-color-number}";
  $material-color: map-get($args, material-color); // $material-color-full-name;
  $material-text-color: contrast($material-color, $lightbg-text, $darkbg-text, map-get($args, contrast-factor));

  & -material-#{$material-color-name}#{unquote($material-color-number)}#{map-get($args, extra)} {
    $args-color: map-merge($args, (
            material-color-full-name: $material-color-full-name,
            material-color: $material-color,
            material-text-color: $material-text-color,
    ));

    @include call-variations-content-mixin($args-color);
  }
}

$all-variations: unquote("-default, -primary, -info, -success, -warning, -danger");