// Convert pixels to ems
// eg. for a relational value of 12px write em(12) when the parent is 16px
// if the parent is another value say 24px write em(12, 24)

@mixin clearfix() {
    &:before,
    &:after {
        content: "";
        display: table;
    }
    &:after {
        clear: both;
    }
}

@mixin button-variant($color, $background, $border) {
  color: $color;
  background-color: $background;
  border-color: $border;

  &:hover,
  &:focus,
  &:active,
  &.active,
  .open > &.dropdown-toggle {
    color: $color;
    background-color: darken($background, 10%);
        border-color: darken($border, 12%);
  }
  &:active,
  &.active,
  .open > &.dropdown-toggle {
    background-image: none;
  }
  &.disabled,
  &[disabled],
  fieldset[disabled] & {
    &,
    &:hover,
    &:focus,
    &:active,
    &.active {
      background-color: $background;
          border-color: $border;
    }
  }

  .badge {
    color: $background;
    background-color: $color;
  }
}

// Button sizes
@mixin button-size($padding-vertical, $padding-horizontal, $font-size, $line-height, $border-radius) {
  padding: $padding-vertical $padding-horizontal;
  font-size: $font-size;
  line-height: $line-height;
  border-radius: $border-radius;
}

@mixin transition($properties...) {
  // Fix for vendor-prefix transform property
  $needs-prefixes: false;
  $webkit: ();
  $moz: ();
  $spec: ();

  // Create lists for vendor-prefixed transform
  @each $list in $properties {
    @if nth($list, 1) == "transform" {
      $needs-prefixes: true;
      $list1: -webkit-transform;
      $list2: -moz-transform;
      $list3: ();

      @each $var in $list {
        $list3: join($list3, $var);

        @if $var != "transform" {
          $list1: join($list1, $var);
          $list2: join($list2, $var);
        }
      }

      $webkit: append($webkit, $list1);
      $moz:    append($moz,    $list2);
      $spec:   append($spec,   $list3);
    } @else {
      $webkit: append($webkit, $list, comma);
      $moz:    append($moz,    $list, comma);
      $spec:   append($spec,   $list, comma);
    }
  }

  @if $needs-prefixes {
    -webkit-transition: $webkit;
       -moz-transition: $moz;
            transition: $spec;
  } @else {
    @if length($properties) >= 1 {
      @include prefixer(transition, $properties, webkit moz spec);
    } @else {
      $properties: all 0.15s ease-out 0s;
      @include prefixer(transition, $properties, webkit moz spec);
    }
  }
}

@mixin transition-property($properties...) {
  -webkit-transition-property: transition-property-names($properties, "webkit");
     -moz-transition-property: transition-property-names($properties, "moz");
          transition-property: transition-property-names($properties, false);
}

@mixin transition-duration($times...) {
  @include prefixer(transition-duration, $times, webkit moz spec);
}

@mixin transition-timing-function($motions...) {
  // ease | linear | ease-in | ease-out | ease-in-out | cubic-bezier()
  @include prefixer(transition-timing-function, $motions, webkit moz spec);
}

@mixin transition-delay($times...) {
  @include prefixer(transition-delay, $times, webkit moz spec);
}

@function em($pixels, $context: $base-font-size) {
  @return #{$pixels/$context}em;
}

/// Global variables to enable or disable vendor prefixes

$prefix-for-webkit:    true !default;
$prefix-for-mozilla:   true !default;
$prefix-for-microsoft: true !default;
$prefix-for-opera:     true !default;
$prefix-for-spec:      true !default;

@mixin prefixer($property, $value, $prefixes) {
  @each $prefix in $prefixes {
    @if $prefix == webkit {
      @if $prefix-for-webkit {
        -webkit-#{$property}: $value;
      }
    } @else if $prefix == moz {
      @if $prefix-for-mozilla {
        -moz-#{$property}: $value;
      }
    } @else if $prefix == ms {
      @if $prefix-for-microsoft {
        -ms-#{$property}: $value;
      }
    } @else if $prefix == o {
      @if $prefix-for-opera {
        -o-#{$property}: $value;
      }
    } @else if $prefix == spec {
      @if $prefix-for-spec {
        #{$property}: $value;
      }
    } @else  {
      @warn "Unrecognized prefix: #{$prefix}";
    }
  }
}

@mixin disable-prefix-for-all() {
  $prefix-for-webkit:    false !global;
  $prefix-for-mozilla:   false !global;
  $prefix-for-microsoft: false !global;
  $prefix-for-opera:     false !global;
  $prefix-for-spec:      false !global;
}

@mixin transform($property: none) {
  // none | <transform-function>
  @include prefixer(transform, $property, webkit moz ms o spec);
}

@mixin transform-origin($axes: 50%) {
  // x-axis - left | center | right  | length | %
  // y-axis - top  | center | bottom | length | %
  // z-axis -                          length
  @include prefixer(transform-origin, $axes, webkit moz ms o spec);
}

@mixin transform-style($style: flat) {
  @include prefixer(transform-style, $style, webkit moz ms o spec);
}