// /**
//  * Copyright (C) 2013 Crossing Hippos - Babs Gösgens. All rights reserved.
//  * Licensed under GNU General Public License version 2 or later; see LICENSE.txt
//  */
@if $trace-imports { @debug 'imported'; }


//  ==========================================================================
//  Function px-to-relative-font-size
//  --------------------------------------------------------------------------
//  Placeholder function for font-sizes.
//	Inserts correct font unit as set in the Vertical-Rhythm module settings.
//  --------------------------------------------------------------------------
//  @param (string) $target-px (value in px)
//  @param (string) $context (value in px)
//  @param (string) $unit (unit of output)
//  @return (string) value in alternate unit
//  ==========================================================================
@function px-to-relative-font-size($target-px, $context: $base-font-size, $unit: $font-unit)
{
	@return px-to-relative-size($target-px, $context, $unit);
}


//  ==========================================================================
//  Function px-to-relative-line-height
//  --------------------------------------------------------------------------
//  Placeholder function for line-heights.
//	inserts correct line-height unit as set in the Vertical-Rhythm module settings.
//  --------------------------------------------------------------------------
//  @param (string) $target-px (value in px)
//  @param (string) $context (value in px)
//  @param (string) $unit (unit of output)
//  @return (string) value in alternate unit
//  ==========================================================================
@function px-to-relative-line-height($target-px, $context: $base-font-size, $unit: $leading-unit)
{
	@return px-to-relative-size($target-px, $context, $unit);
}


//  ==========================================================================
//  Function extract-type-style
//  --------------------------------------------------------------------------
//  Extract the style property from a type array
//  --------------------------------------------------------------------------
//  @param (array) $type (a valid type array: $style, $variant, $weight, $family)
//  @return (string) font-style
//  ==========================================================================
@function extract-type-style($type) {
	@return nth($type, 1);
}


//  ==========================================================================
//  Function extract-type-variant
//  --------------------------------------------------------------------------
//  Extract the variant property from a type array
//  --------------------------------------------------------------------------
//  @param (array) $type (a valid type array: $style, $variant, $weight, $family)
//  @return (string) font-variant
//  ==========================================================================
@function extract-type-variant($type)
{
	@return nth($type, 2);
}


//  ==========================================================================
//  Function extract-type-weight
//  --------------------------------------------------------------------------
//  Extract the weight property from a type array
//  --------------------------------------------------------------------------
//  @param (array) $type (a valid type array: $style, $variant, $weight, $family)
//  @return (string) font-weight
//  ==========================================================================
@function extract-type-weight($type)
//  ==========================================================================
{
	@return nth($type, 3);
}


//  ==========================================================================
//  Function extract-type-family
//  --------------------------------------------------------------------------
//  Extract the family property from a type array
//  --------------------------------------------------------------------------
//  @param (array) $type (a valid type array: $style, $variant, $weight, $family)
//  @return (string) font-family
//  ==========================================================================
@function extract-type-family($type)
{
	@return nth($type, 4);
}


//  ==========================================================================
//  Function weight-number-to-string
//  --------------------------------------------------------------------------
//  Converts a weight number to a string and returns it
//  --------------------------------------------------------------------------
//  @param (integer) $weight a valid weight number: 100 through 900)
//  @return (string) weight
//  ==========================================================================
@function weight-number-to-string($weight)
{
	@if $weight == 100 { @return "ultra-light"; }
	@if $weight == 200 { @return "light"; }
	@if $weight == 300 { @return "book"; }
	@if $weight == 400 { @return "regular"; }
	@if $weight == 500 { @return "medium"; }
	@if $weight == 600 { @return "semi-bold"; }
	@if $weight == 700 { @return "bold"; }
	@if $weight == 800 { @return "extra-bold"; }
	@if $weight == 900 { @return "heavy"; }
	@else {
		@warn "Not a valid weight";
		@return false;
	}
}

//* To Do: (everything below needs to be looked over as settings in the Type modules have changed)

// //* Calculate the optimal line-height */
// @function leading-in-px($base-font-size, $balance-over: false) {

// 	$dividend: $base-font-size / $base-line-height;
// 	$leading: $base-line-height;

// 	// For smaller font-sizes, for instance balance a font-size of 8px over two baselines of 24px in three (balance) lines resulting in 48/3=16px;
// 	@if $balance-over {
// 		$leading: 2 * $base-line-height / $balance-over;		
// 		@return $leading;
// 	}
// 	@if $dividend<0.5 {
// 		$leading: 0.5 * $base-line-height;
// 		@return $leading;
// 	}
// 	@if $dividend>1 {
// 		$leading: ceil($dividend) * $base-line-height;
// 		@if ($leading - $base-font-size) < (2 * $min-line-padding) {
// 			$leading: $leading + $base-line-height;
// 		}
// 		@return $leading;
// 	}
// 	@else {
// 		@return $leading;		
// 	}
// }

// @function px-to-rhythm($value) {
// 	@return $value/$base-line-height;
// }

// @function base-line-rhythm($base-lines: 1) {
// 	// @debug $base-lines;
// 	// @debug $base-line-height;
// 	@return ($base-lines * $base-line-height);
// }