SnapKit/_sass/foundation/components/_button-groups.scss

// Foundation by ZURB
// foundation.zurb.com
// Licensed under MIT Open Source

@import 'global';
@import 'buttons';

//
// Button Group Variables
//
$include-html-button-classes: $include-html-classes !default;

// Sets the margin for the right side by default, and the left margin if right-to-left direction is used
$button-bar-margin-opposite: rem-calc(10) !default;
$button-group-border-width: 1px !default;

//
// Button Group Mixins
//

// We use this to add styles for a button group container
@mixin button-group-container($styles:true, $float:false) {
  @if $styles {
    list-style: none;
    margin: 0;
    #{$default-float}: 0;
    @include clearfix();
  }
  @if $float {
    float: #{$default-float};
    margin-#{$opposite-direction}: $button-bar-margin-opposite;
    & div { overflow: hidden; }
  }
}

// We use this to control styles for button groups
@mixin button-group-style($radius:false, $even:false, $float:false, $orientation:horizontal) {

  > button, .button {
    border-#{$default-float}: $button-group-border-width solid;
    border-color: rgba(255, 255, 255, .5);
  }

  &:first-child {
    button, .button {
      border-#{$default-float}: 0;
    }
  }

  $button-group-display: list-item;
  $button-group-margin: 0;

  // We use this to control the flow, or remove those styles completely.
  @if $float {
    $button-group-display: list-item;
    $button-group-margin: 0;
    float: $float;
    // Make sure the first child doesn't get the negative margin.
    &:first-child { margin-#{$default-float}: 0; }
  }
  @else {
    $button-group-display: inline-block;
    $button-group-margin: 0 -2px;
  }

  @if $orientation == vertical {
    $button-group-display: block;
    $button-group-margin: 0;
    > button, .button {
      border-color: rgba(255, 255, 255, .5);
      border-left-width: 0;
      border-top: $button-group-border-width solid;
      display: block;
      margin:0;
    }
    > button {
        width: 100%;
    }

    &:first-child {
      button, .button {
        border-top: 0;
      }
    }
  }

  display: $button-group-display;
  margin: $button-group-margin;


  // We use these to control left and right radius on first/last buttons in the group.
  @if $radius == true {
    &,
    > a,
    > button,
    > .button { @include radius(0); }
    &:first-child,
    &:first-child > a,
    &:first-child > button,
    &:first-child > .button {
      @if $orientation == vertical {
        @include side-radius(top, $button-radius);
      }
      @else {
        @include side-radius($default-float, $button-radius);
      }
    }
    &:last-child,
    &:last-child > a,
    &:last-child > button,
    &:last-child > .button {
      @if $orientation == vertical {
        @include side-radius(bottom, $button-radius);
      }
      @else {
        @include side-radius($opposite-direction, $button-radius);
      }
    }
  }
  @else if $radius {
    &,
    > a,
    > button,
    > .button { @include radius(0); }
    &:first-child,
    &:first-child > a,
    &:first-child > button,
    &:first-child > .button {
      @if $orientation == vertical {
        @include side-radius(top, $radius);
      }
      @else {
        @include side-radius($default-float, $radius);
      }
    }
    &:last-child,
    &:last-child > a,
    &:last-child > button,
    &:last-child > .button {
      @if $orientation == vertical {
        @include side-radius(bottom, $radius);
      }
      @else {
        @include side-radius($opposite-direction, $radius);
      }
    }
  }

  // We use this to make the buttons even width across their container
  @if $even {
    width: percentage((100/$even) / 100);
    button, .button { width: 100%; }
  }
}

@include exports("button-group") {
  @if $include-html-button-classes {
    .button-group { @include button-group-container;

      @for $i from 2 through 8 {
        &.even-#{$i} li { @include button-group-style($even:$i, $float:null); }
      }

      > li { @include button-group-style(); }

      &.stack {
        > li { @include button-group-style($orientation:vertical); float: none; }
      }

      &.stack-for-small {
        > li {
          @include button-group-style($orientation:horizontal);
          @media #{$small-only} {
            @include button-group-style($orientation:vertical);
          }
        }
      }

      &.radius > * { @include button-group-style($radius:$button-radius, $float:null); }
      &.radius.stack > * { @include button-group-style($radius:$button-radius, $float:null, $orientation:vertical); }
      &.radius.stack-for-small > * {
        @media #{$medium-up} {
          @include button-group-style($radius:$button-radius, $orientation:horizontal);
        }
        @media #{$small-only} {
          @include button-group-style($radius:$button-radius, $orientation:vertical);
        }
      }

      &.round > * { @include button-group-style($radius:$button-round, $float:null); }
      &.round.stack > * { @include button-group-style($radius:$button-med, $float:null, $orientation:vertical); }
      &.round.stack-for-small > * {
        @media #{$medium-up} {
          @include button-group-style($radius:$button-round, $orientation:horizontal);
        }
        @media #{$small-only} {
          @include button-group-style($radius:$button-med, $orientation:vertical);
        }
      }
    }

    .button-bar {
      @include clearfix;
      .button-group { @include button-group-container($styles:false, $float:true); }
    }
  }
}