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feat(material/theming): Expose tonal palette values in the system level variables #30334

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feat(material/theming): Expose tonal palette values in the system level variables #30334

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26 changes: 9 additions & 17 deletions src/material/core/tokens/_m3-system.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -130,13 +130,6 @@

$sys-colors: _generate-sys-colors($ref, $type);

// Manually insert a subset of palette values that are used directly by components
// instead of system variables.
$sys-colors: map.set($sys-colors,
'neutral-variant20', map.get($ref, md-ref-palette, neutral-variant20));
$sys-colors: map.set($sys-colors,
'neutral10', map.get($ref, md-ref-palette, neutral10));

& {
@each $name, $value in $sys-colors {
--#{$prefix}-#{$name}: #{map.get($overrides, $name) or $value};
Expand All @@ -145,14 +138,19 @@
}

@function _generate-sys-colors($ref, $type) {
$palette-colors: definitions.md-ref-palette-values($ref);
@each $name, $value in $palette-colors {
$palette-colors: map.set($palette-colors, $name, map.get($ref, md-ref-palette, $name))
}

$light-sys-colors: definitions.md-sys-color-values-light($ref);
@if ($type == light) {
@return $light-sys-colors;
@return map.merge($palette-colors, $light-sys-colors);
}

$dark-sys-colors: definitions.md-sys-color-values-dark($ref);
@if ($type == dark) {
@return $dark-sys-colors;
@return map.merge($palette-colors, $dark-sys-colors);
}

@if ($type == color-scheme) {
Expand All @@ -162,7 +160,7 @@
$light-dark-sys-colors:
map.set($light-dark-sys-colors, $name, light-dark($light-value, $dark-value));
}
@return $light-dark-sys-colors;
@return map.merge($palette-colors, $light-dark-sys-colors);
}

@error 'Unknown theme-type provided: #{$type}';
Expand Down Expand Up @@ -246,14 +244,8 @@
_create-system-app-vars-map(definitions.md-sys-state-values()),
'md-sys-shape':
_create-system-app-vars-map(definitions.md-sys-shape-values()),
// Add a subset of palette-specific colors used by components instead of system values
'md-ref-palette':
_create-system-app-vars-map(
(
neutral10: '', // Form field native select option text color
neutral-variant20: '', // Sidenav scrim (container background shadow when opened),
)
),
_create-system-app-vars-map(definitions.md-ref-palette-values()),
);

@return sass-utils.deep-merge-all(
Expand Down
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