@import "shared";

$default-border-radius: 5px !default;

// Round all corners by a specific amount, defaults to value of `$default-border-radius`.
//
// When two values are passed, the first is the horizontal radius
// and the second is the vertical radius.
//
// Note: webkit does not support shorthand syntax for several corners at once.
// So in the case where you pass several values only the first will be passed to webkit.
//
// Examples:
//
//     .simple   { @include border-radius(4px, 4px); }
//     .compound { @include border-radius(2px 5px, 3px 6px); }
//     .crazy    { @include border-radius(1px 3px 5px 7px, 2px 4px 6px 8px)}
//
// Which generates:
//
//    .simple {
//      -webkit-border-radius: 4px 4px;
//      -moz-border-radius: 4px / 4px;
//      -khtml-border-radius: 4px / 4px;
//      border-radius: 4px / 4px; }
//    
//    .compound {
//      -webkit-border-radius: 2px 3px;
//      -moz-border-radius: 2px 5px / 3px 6px;
//      -khtml-border-radius: 2px 5px / 3px 6px;
//      border-radius: 2px 5px / 3px 6px; }
//    
//    .crazy {
//      -webkit-border-radius: 1px 2px;
//      -moz-border-radius: 1px 3px 5px 7px / 2px 4px 6px 8px;
//      -khtml-border-radius: 1px 3px 5px 7px / 2px 4px 6px 8px;
//      border-radius: 1px 3px 5px 7px / 2px 4px 6px 8px; }

@mixin border-radius($radius: $default-border-radius, $vertical-radius: false) {

  @if $vertical-radius {
    // Webkit doesn't understand the official shorthand syntax for specifying
    // a vertical radius unless so in case there's several we only take the first.
    @include experimental(border-radius, first-value-of($radius) first-value-of($vertical-radius),
      not(-moz),
      -webkit,
      not(-o),
      not(-ms),
      not(-khtml),
      not official
    );
    @include experimental("border-radius", $radius unquote("/") $vertical-radius,
      -moz,
      not(-webkit),
      not(-o),
      not(-ms),
      -khtml,
      official
    );
  }
  @else {
    @include experimental(border-radius, $radius);
  }
}

// Round radius at position by amount.
//
// * legal values for `$vert`: `top`, `bottom`
// * legal values for `$horz`: `left`, `right`

@mixin border-corner-radius($vert, $horz, $radius: $default-border-radius) {
  // Support for mozilla's syntax for specifying a corner
  @include experimental("border-radius-#{$vert}#{$horz}", $radius,
    -moz,
    not(-webkit),
    not(-o),
    not(-ms),
    not(-khtml),
    not official
  );
  @include experimental("border-#{$vert}-#{$horz}-radius", $radius,
    not(-moz),
    -webkit,
    not(-o),
    not(-ms),
    -khtml,
    official
  );
  
}

// Round top-left corner only

@mixin border-top-left-radius($radius: $default-border-radius) {
  @include border-corner-radius(top, left, $radius); }

// Round top-right corner only

@mixin border-top-right-radius($radius: $default-border-radius) {
  @include border-corner-radius(top, right, $radius); }

// Round bottom-left corner only

@mixin border-bottom-left-radius($radius: $default-border-radius) {
  @include border-corner-radius(bottom, left, $radius); }

// Round bottom-right corner only

@mixin border-bottom-right-radius($radius: $default-border-radius) {
  @include border-corner-radius(bottom, right, $radius); }

// Round both top corners by amount
@mixin border-top-radius($radius: $default-border-radius) {
  @include border-top-left-radius($radius);
  @include border-top-right-radius($radius); }

// Round both right corners by amount
@mixin border-right-radius($radius: $default-border-radius) {
  @include border-top-right-radius($radius);
  @include border-bottom-right-radius($radius); }

// Round both bottom corners by amount
@mixin border-bottom-radius($radius: $default-border-radius) {
  @include border-bottom-left-radius($radius);
  @include border-bottom-right-radius($radius); }

// Round both left corners by amount
@mixin border-left-radius($radius: $default-border-radius) {
  @include border-top-left-radius($radius);
  @include border-bottom-left-radius($radius); }
