//
// Copyright 2019 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.
//

@import "./functions";

// Tracks whether the current context is inside a `mdc-feature-targets` mixin.
$mdc-feature-targets-context_: false;

// Mixin that annotates the contained styles as applying to specific cross-cutting features
// indicated by the given list of feature targets.
@mixin mdc-feature-targets($feature-targets...) {
  // Prevent accidental nesting of this mixin, which could lead to unexpected results.
  @if $mdc-feature-targets-context_ {
    @error "mdc-feature-targets must not be used inside of another mdc-feature-targets block";
  }

  $mdc-feature-targets-context_: true !global;
  $parsed-targets: mdc-feature-parse-targets($feature-targets);

  @if mdc-feature-is-query-satisfied_(map-get($parsed-targets, query), map-get($parsed-targets, available)) {
    @content;
  }

  $mdc-feature-targets-context_: false !global;
}