////////////////////////////// // Converts the input value to Base EMs ////////////////////////////// @function breakpoint-to-base-em($value) {

$value-unit: unit($value);

// Will convert relative EMs into root EMs.
@if breakpoint-get('base font size') and type-of(breakpoint-get('base font size')) == 'number' and $value-unit == 'em' {
  $base-unit: unit(breakpoint-get('base font size'));

  @if $base-unit == 'px' or $base-unit == '%' or $base-unit == 'em' or $base-unit == 'pt' {
    @return base-conversion($value) / base-conversion(breakpoint-get('base font size')) * 1em;
  }
  @else {
    @warn '#{breakpoint-get(\'base font size\')} is not set in valid units for font size!';
    @return false;
  }
}
@else {
  @return base-conversion($value);
}

}

@function base-conversion($value) {

$unit: unit($value);

@if $unit == 'px' {
  @return $value / 16px * 1em;
}
@else if $unit == '%' {
  @return $value / 100% * 1em;
}
@else if $unit == 'em' {
  @return $value;
}
@else if $unit == 'pt' {
  @return $value / 12pt * 1em;
}
@else {
  @return $value;

// @warn 'Everything is terrible! What have you done?!';

}

}

////////////////////////////// // Returns whether the feature can have a min/max pair ////////////////////////////// $breakpoint-min-max-features: 'color',

'color-index',
'aspect-ratio',
'device-aspect-ratio',
'device-height',
'device-width',
'height',
'monochrome',
'resolution',
'width';

@function breakpoint-min-max($feature) {

@each $item in $breakpoint-min-max-features {
  @if $feature == $item {
    @return true;
  }
}
@return false;

}

////////////////////////////// // Returns whether the feature can have a string value ////////////////////////////// $breakpoint-string-features: 'orientation',

'scan',
'color',
'aspect-ratio',
'device-aspect-ratio',
'pointer',
'luminosity';

@function breakpoint-string-value($feature) {

@each $item in $breakpoint-string-features {
  @if breakpoint-min-max($item) {
    @if $feature == 'min-#{$item}' or $feature == 'max-#{$item}' {
      @return true;
    }
  }
  @else if $feature == $item {
    @return true;
  }
}
@return false;

}

////////////////////////////// // Returns whether the feature is a media type ////////////////////////////// $breakpoint-media-types: 'all',

'braille',
'embossed',
'handheld',
'print',
'projection',
'screen',
'speech',
'tty',
'tv';

@function breakpoint-is-media($feature) {

@each $media in $breakpoint-media-types {
  @if ($feature == $media) or ($feature == 'not #{$media}') or ($feature == 'only #{$media}') {
    @return true;
  }
}

@return false;

}

////////////////////////////// // Returns whether the feature can stand alone ////////////////////////////// $breakpoint-single-string-features: 'color',

'color-index',
'grid',
'monochrome';

@function breakpoint-single-string($feature) {

@each $item in $breakpoint-single-string-features {
  @if $feature == $item {
    @return true;
  }
}
@return false;

}

////////////////////////////// // Returns whether the feature ////////////////////////////// @function breakpoint-is-resolution($feature) {

$resolutions: 'device-pixel-ratio', 'dpr';

@if breakpoint-get('transform resolutions') {
  $resolutions: append($resolutions, 'resolution');
}

@each $reso in $resolutions {
  @if index($feature, $reso) or index($feature, 'min-#{$reso}') or index($feature, 'max-#{$reso}') {
    @return true;
  }
}

@return false;

}