//
// Copyright 2020 Google Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

@use 'sass:list';
@use 'sass:map';
@use 'sass:meta';

/// Adds optional GSS annotation comments. Useful for theme mixins where one or
/// more properties are set indirectly.
///
/// Annotations may be provided as a Map of annotations or as named arguments.
///
/// @example - scss
///   @include annotate((noflip: true));
///   left: 0;
///
/// @example - scss
///   @include annotate($noflip: true);
///   left: 0;
///
/// @example - css
///   /* @noflip */ /*rtl:ignore*/
///   left: 0;
///
/// @param {Map} $annotations - Map of annotations. Values must be set to `true`
///     for an annotation to be added.
@mixin annotate($annotations...) {
  $keywords: meta.keywords($annotations);
  @if list.length($annotations) > 0 {
    $annotations: list.nth($annotations, 1);
  } @else {
    $annotations: $keywords;
  }

  @if (map.get($annotations, alternate) == true) {
    /* @alternate */
  }

  // noflip must be the last tag right before the property
  @if (map.get($annotations, noflip) == true) {
    /* @noflip */ /*rtl:ignore*/
  }
}