// Lightning Design System 2.8.0
// Copyright (c) 2015-present, salesforce.com, inc. All rights reserved
// Licensed under BSD 3-Clause - see LICENSE.txt or git.io/sfdc-license

/// Calculate max-height of dropdown length for list overflow
///
/// @require $length, $font-size, $line-height, $padding
/// @param $length {Integer} Number of items to show before overlow
/// @param $font-size {String} Font-size of list items
/// @param $line-height {String} Line-height of list items
/// @param $padding {String} Vertical padding of list items
/// @param $icon {String} Size of icon in list items
@mixin dropdown-overflow-length(
  $length,
  $font-size: $font-size-medium,
  $line-height: $line-height-text,
  $padding: $spacing-medium,
  $icon-size: null
) {
  @include enable-ios-momentum-scrolling;

  // Calculate icon and padding since icon will always be taller than line height of text
  @if $icon-size != null {
    max-height: calc((#{$icon-size} + #{$padding}) * #{$length});
  }
  // Calculate text height and padding
  @else {
    max-height: calc(((#{$font-size} * #{$line-height}) + #{$padding}) * #{$length});
  }
  overflow-y: auto;
}