/// Returns a single list on the scale
///
/// @param {Number} $index - number of the scale to return
///
/// @returns {List} list of the requested scale value
@function oTypographyGetScale($index: 0) {
	@return map-get($o-typography-font-scale, $index);
}

/// Returns the font-size value from the scale passed in
/// modified by the font-adjust if present
///
/// @param {Number} $scale - number of the scale to return
/// @param {Number} $font-adjust - multiplier if used as a progressive font
///
/// @returns {Number} size in px
@function _oTypographyFontSizeFromScale($scale, $font-adjust: 1) {
	$settings: oTypographyGetScale($scale);
	@return (nth($settings, 1) * $font-adjust) * 1px;
}

/// Returns the line-height value from the scale passed in or
/// the line-height setting if one is passed
///
/// @param {Number} $scale - number of the scale to return
/// @param {Number} $line-height - size to output if not false
///
/// @returns {Number} size in px
@function _oTypographyLineHeightFromScale($scale, $line-height) {
	$settings: oTypographyGetScale($scale);

	@if $line-height {
		@return $line-height;
	} @else {
		@return nth($settings, 2) * 1px;
	}
}

/// Returns a spacing size in px based on the baseline unit and number of units
/// passed to the function
///
/// @param {Number} $units [0] - multiple of the baseline unit
///
/// @returns {Number} size in px
@function oTypographySpacingSize($units: 0) {
	@return ($units * $o-typography-baseline-unit) * 1px;
}