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@use 'sass:color';
@use 'sass:math';
@use 'sass:map';
@use 'sass:list';
@use 'iro-sass/src/index' as iro;
@use 'config';
@use '@oddbird/blend';
@use '@oddbird/blend/sass/convert' as blend-convert;
@function color($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
@return iro.props-get(list.join(--colors, $key), $tree, $default, $global);
}
@function global-color($key, $tree: iro.$props-default-tree, $default: null, $global: true) {
@return color($key, $tree, $default, $global);
}
@function foreign-color($foreign-key, $key, $tree: iro.$props-default-tree, $default: null, $global: true) {
@return iro.props-get(list.join($foreign-key --colors, $key), $tree, $default, $global);
}
@function dim($key, $tree: iro.$props-default-tree, $default: null, $global: false) {
@return iro.props-get(list.join(--dims, $key), $tree, $default, $global);
}
@function global-dim($key, $tree: iro.$props-default-tree, $default: null, $global: true) {
@return dim($key, $tree, $default, $global);
}
@function foreign-dim($foreign-key, $key, $tree: iro.$props-default-tree, $default: null, $global: true) {
@return iro.props-get(list.join($foreign-key --dims, $key), $tree, $default, $global);
}
@function font-prop($data, $overrides, $key, $prop) {
@if (map.has-key($overrides, $prop)) {
@return map.get($overrides, $prop);
} @else if (map.has-key($data, $prop)) {
@return global-dim(--font $key $prop);
}
@return null;
}
@function set-font($key, $overrides: ()) {
$font: iro.props-get-static(list.join(--dims --font, $key), $global: true);
$map: (
font-family: font-prop($font, $overrides, $key, --family),
font-size: font-prop($font, $overrides, $key, --size),
font-weight: font-prop($font, $overrides, $key, --weight),
font-style: font-prop($font, $overrides, $key, --style),
line-height: font-prop($font, $overrides, $key, --line-height),
text-transform: font-prop($font, $overrides, $key, --transform),
letter-spacing: font-prop($font, $overrides, $key, --spacing),
font-variant-alternates: font-prop($font, $overrides, $key, --variant-alternates),
font-feature-settings: font-prop($font, $overrides, $key, --feature-settings),
);
@return $map;
}
@function lum($color) {
@return list.nth(blend-convert.lin_sRGB_to_XYZ(blend-convert.lin_sRGB(blend-convert.sassToRgb($color))), 2) + .05;
}
@function multi-contrast($base-color, $colors, $wanted-contrasts, $reference-color: $base-color) {
$ref-lum: lum($reference-color);
$result: ();
$colors-len: list.length($colors);
$colors-idx: 1;
$wanted-len: list.length($wanted-contrasts);
$wanted-idx: 1;
@while $colors-idx <= $colors-len and $wanted-idx <= $wanted-len {
$color: list.nth($colors, $colors-idx);
$lum: lum($color);
$contrast: math.div(math.max($ref-lum, $lum), math.min($lum, $ref-lum));
@if $contrast != 1 {
@if $lum <= $ref-lum {
$contrast: -1 * $contrast;
}
}
$wanted: list.nth($wanted-contrasts, $wanted-idx);
$wanted-key: list.nth($wanted, 1);
$wanted-contrast: list.nth($wanted, 2);
@if $contrast >= $wanted-contrast {
$result: map.set($result, $wanted-key, $color);
$wanted-idx: $wanted-idx + 1;
} @else {
$colors-idx: $colors-idx + 1;
}
}
$last-color: list.nth($colors, $colors-len);
@if $wanted-idx <= $wanted-len {
@for $i from $wanted-idx through $wanted-len {
$wanted: list.nth($wanted-contrasts, $i);
$wanted-key: list.nth($wanted, 1);
$result: map.set($result, $wanted-key, $last-color);
}
}
@return $result;
}
@function palette($base-color, $contrasts, $reference-color: $base-color) {
$palette: ();
@if list.nth(list.nth($contrasts, 1), 2) > list.nth(list.nth($contrasts, list.length($contrasts)), 2) {
$contrasts: iro.fn-list-reverse($contrasts);
}
$i: -100%;
@while $i <= 100% {
$palette: list.append($palette, blend.scale($base-color, $l: $i));
$i: $i + config.$palette-precision;
}
@return multi-contrast($base-color, $palette, $contrasts, $reference-color);
}
@function px-to-em($size, $base: iro.$vars-root-size) {
@return math.div($size, $base) * 1em;
}
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