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feat(elevation): Allow tonal color elevations through mat-elevation mixin #8995

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Jan 4, 2018
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feat(elevation): Allow tonal color elevations through mat-elevation mixin #8995

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181 changes: 91 additions & 90 deletions src/lib/core/style/_elevation.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -27,98 +27,99 @@
// itself). For a further explanation of these terms and their meanings, see
// https://en.wikipedia.org/wiki/Umbra,_penumbra_and_antumbra.

$_umbra-color: rgba(black, 0.2);
$_penumbra-color: rgba(black, 0.14);
$_ambient-color: rgba(black, 0.12);

// Maps for the different shadow sets and their values within each z-space. These values were
// created by taking a few reference shadow sets created by Google's Designers and interpolating
// all of the values between them.

$_umbra-elevation-map: (
0: '0px 0px 0px 0px #{$_umbra-color}',
1: '0px 2px 1px -1px #{$_umbra-color}',
2: '0px 3px 1px -2px #{$_umbra-color}',
3: '0px 3px 3px -2px #{$_umbra-color}',
4: '0px 2px 4px -1px #{$_umbra-color}',
5: '0px 3px 5px -1px #{$_umbra-color}',
6: '0px 3px 5px -1px #{$_umbra-color}',
7: '0px 4px 5px -2px #{$_umbra-color}',
8: '0px 5px 5px -3px #{$_umbra-color}',
9: '0px 5px 6px -3px #{$_umbra-color}',
10: '0px 6px 6px -3px #{$_umbra-color}',
11: '0px 6px 7px -4px #{$_umbra-color}',
12: '0px 7px 8px -4px #{$_umbra-color}',
13: '0px 7px 8px -4px #{$_umbra-color}',
14: '0px 7px 9px -4px #{$_umbra-color}',
15: '0px 8px 9px -5px #{$_umbra-color}',
16: '0px 8px 10px -5px #{$_umbra-color}',
17: '0px 8px 11px -5px #{$_umbra-color}',
18: '0px 9px 11px -5px #{$_umbra-color}',
19: '0px 9px 12px -6px #{$_umbra-color}',
20: '0px 10px 13px -6px #{$_umbra-color}',
21: '0px 10px 13px -6px #{$_umbra-color}',
22: '0px 10px 14px -6px #{$_umbra-color}',
23: '0px 11px 14px -7px #{$_umbra-color}',
24: '0px 11px 15px -7px #{$_umbra-color}'
);

$_penumbra-elevation-map: (
0: '0px 0px 0px 0px #{$_penumbra-color}',
1: '0px 1px 1px 0px #{$_penumbra-color}',
2: '0px 2px 2px 0px #{$_penumbra-color}',
3: '0px 3px 4px 0px #{$_penumbra-color}',
4: '0px 4px 5px 0px #{$_penumbra-color}',
5: '0px 5px 8px 0px #{$_penumbra-color}',
6: '0px 6px 10px 0px #{$_penumbra-color}',
7: '0px 7px 10px 1px #{$_penumbra-color}',
8: '0px 8px 10px 1px #{$_penumbra-color}',
9: '0px 9px 12px 1px #{$_penumbra-color}',
10: '0px 10px 14px 1px #{$_penumbra-color}',
11: '0px 11px 15px 1px #{$_penumbra-color}',
12: '0px 12px 17px 2px #{$_penumbra-color}',
13: '0px 13px 19px 2px #{$_penumbra-color}',
14: '0px 14px 21px 2px #{$_penumbra-color}',
15: '0px 15px 22px 2px #{$_penumbra-color}',
16: '0px 16px 24px 2px #{$_penumbra-color}',
17: '0px 17px 26px 2px #{$_penumbra-color}',
18: '0px 18px 28px 2px #{$_penumbra-color}',
19: '0px 19px 29px 2px #{$_penumbra-color}',
20: '0px 20px 31px 3px #{$_penumbra-color}',
21: '0px 21px 33px 3px #{$_penumbra-color}',
22: '0px 22px 35px 3px #{$_penumbra-color}',
23: '0px 23px 36px 3px #{$_penumbra-color}',
24: '0px 24px 38px 3px #{$_penumbra-color}'
);
@function _get-umbra-map($color) {
@return (
0: '0px 0px 0px 0px #{rgba($color, 0.2)}',
1: '0px 2px 1px -1px #{rgba($color, 0.2)}',
2: '0px 3px 1px -2px #{rgba($color, 0.2)}',
3: '0px 3px 3px -2px #{rgba($color, 0.2)}',
4: '0px 2px 4px -1px #{rgba($color, 0.2)}',
5: '0px 3px 5px -1px #{rgba($color, 0.2)}',
6: '0px 3px 5px -1px #{rgba($color, 0.2)}',
7: '0px 4px 5px -2px #{rgba($color, 0.2)}',
8: '0px 5px 5px -3px #{rgba($color, 0.2)}',
9: '0px 5px 6px -3px #{rgba($color, 0.2)}',
10: '0px 6px 6px -3px #{rgba($color, 0.2)}',
11: '0px 6px 7px -4px #{rgba($color, 0.2)}',
12: '0px 7px 8px -4px #{rgba($color, 0.2)}',
13: '0px 7px 8px -4px #{rgba($color, 0.2)}',
14: '0px 7px 9px -4px #{rgba($color, 0.2)}',
15: '0px 8px 9px -5px #{rgba($color, 0.2)}',
16: '0px 8px 10px -5px #{rgba($color, 0.2)}',
17: '0px 8px 11px -5px #{rgba($color, 0.2)}',
18: '0px 9px 11px -5px #{rgba($color, 0.2)}',
19: '0px 9px 12px -6px #{rgba($color, 0.2)}',
20: '0px 10px 13px -6px #{rgba($color, 0.2)}',
21: '0px 10px 13px -6px #{rgba($color, 0.2)}',
22: '0px 10px 14px -6px #{rgba($color, 0.2)}',
23: '0px 11px 14px -7px #{rgba($color, 0.2)}',
24: '0px 11px 15px -7px #{rgba($color, 0.2)}'
);
}

$_ambient-elevation-map: (
0: '0px 0px 0px 0px #{$_ambient-color}',
1: '0px 1px 3px 0px #{$_ambient-color}',
2: '0px 1px 5px 0px #{$_ambient-color}',
3: '0px 1px 8px 0px #{$_ambient-color}',
4: '0px 1px 10px 0px #{$_ambient-color}',
5: '0px 1px 14px 0px #{$_ambient-color}',
6: '0px 1px 18px 0px #{$_ambient-color}',
7: '0px 2px 16px 1px #{$_ambient-color}',
8: '0px 3px 14px 2px #{$_ambient-color}',
9: '0px 3px 16px 2px #{$_ambient-color}',
10: '0px 4px 18px 3px #{$_ambient-color}',
11: '0px 4px 20px 3px #{$_ambient-color}',
12: '0px 5px 22px 4px #{$_ambient-color}',
13: '0px 5px 24px 4px #{$_ambient-color}',
14: '0px 5px 26px 4px #{$_ambient-color}',
15: '0px 6px 28px 5px #{$_ambient-color}',
16: '0px 6px 30px 5px #{$_ambient-color}',
17: '0px 6px 32px 5px #{$_ambient-color}',
18: '0px 7px 34px 6px #{$_ambient-color}',
19: '0px 7px 36px 6px #{$_ambient-color}',
20: '0px 8px 38px 7px #{$_ambient-color}',
21: '0px 8px 40px 7px #{$_ambient-color}',
22: '0px 8px 42px 7px #{$_ambient-color}',
23: '0px 9px 44px 8px #{$_ambient-color}',
24: '0px 9px 46px 8px #{$_ambient-color}'
);
@function _get-penumbra-map($color) {
@return (
0: '0px 0px 0px 0px #{rgba($color, 0.14)}',
1: '0px 1px 1px 0px #{rgba($color, 0.14)}',
2: '0px 2px 2px 0px #{rgba($color, 0.14)}',
3: '0px 3px 4px 0px #{rgba($color, 0.14)}',
4: '0px 4px 5px 0px #{rgba($color, 0.14)}',
5: '0px 5px 8px 0px #{rgba($color, 0.14)}',
6: '0px 6px 10px 0px #{rgba($color, 0.14)}',
7: '0px 7px 10px 1px #{rgba($color, 0.14)}',
8: '0px 8px 10px 1px #{rgba($color, 0.14)}',
9: '0px 9px 12px 1px #{rgba($color, 0.14)}',
10: '0px 10px 14px 1px #{rgba($color, 0.14)}',
11: '0px 11px 15px 1px #{rgba($color, 0.14)}',
12: '0px 12px 17px 2px #{rgba($color, 0.14)}',
13: '0px 13px 19px 2px #{rgba($color, 0.14)}',
14: '0px 14px 21px 2px #{rgba($color, 0.14)}',
15: '0px 15px 22px 2px #{rgba($color, 0.14)}',
16: '0px 16px 24px 2px #{rgba($color, 0.14)}',
17: '0px 17px 26px 2px #{rgba($color, 0.14)}',
18: '0px 18px 28px 2px #{rgba($color, 0.14)}',
19: '0px 19px 29px 2px #{rgba($color, 0.14)}',
20: '0px 20px 31px 3px #{rgba($color, 0.14)}',
21: '0px 21px 33px 3px #{rgba($color, 0.14)}',
22: '0px 22px 35px 3px #{rgba($color, 0.14)}',
23: '0px 23px 36px 3px #{rgba($color, 0.14)}',
24: '0px 24px 38px 3px #{rgba($color, 0.14)}'
);
}

@function _get-ambient-map($color) {
@return (
0: '0px 0px 0px 0px #{rgba($color, 0.12)}',
1: '0px 1px 3px 0px #{rgba($color, 0.12)}',
2: '0px 1px 5px 0px #{rgba($color, 0.12)}',
3: '0px 1px 8px 0px #{rgba($color, 0.12)}',
4: '0px 1px 10px 0px #{rgba($color, 0.12)}',
5: '0px 1px 14px 0px #{rgba($color, 0.12)}',
6: '0px 1px 18px 0px #{rgba($color, 0.12)}',
7: '0px 2px 16px 1px #{rgba($color, 0.12)}',
8: '0px 3px 14px 2px #{rgba($color, 0.12)}',
9: '0px 3px 16px 2px #{rgba($color, 0.12)}',
10: '0px 4px 18px 3px #{rgba($color, 0.12)}',
11: '0px 4px 20px 3px #{rgba($color, 0.12)}',
12: '0px 5px 22px 4px #{rgba($color, 0.12)}',
13: '0px 5px 24px 4px #{rgba($color, 0.12)}',
14: '0px 5px 26px 4px #{rgba($color, 0.12)}',
15: '0px 6px 28px 5px #{rgba($color, 0.12)}',
16: '0px 6px 30px 5px #{rgba($color, 0.12)}',
17: '0px 6px 32px 5px #{rgba($color, 0.12)}',
18: '0px 7px 34px 6px #{rgba($color, 0.12)}',
19: '0px 7px 36px 6px #{rgba($color, 0.12)}',
20: '0px 8px 38px 7px #{rgba($color, 0.12)}',
21: '0px 8px 40px 7px #{rgba($color, 0.12)}',
22: '0px 8px 42px 7px #{rgba($color, 0.12)}',
23: '0px 9px 44px 8px #{rgba($color, 0.12)}',
24: '0px 9px 46px 8px #{rgba($color, 0.12)}'
);
}

// The default duration value for elevation transitions.
$mat-elevation-transition-duration: 280ms !default;
Expand All @@ -131,17 +132,17 @@ $_mat-elevation-prefix: 'mat-elevation-z';

// Applies the correct css rules to an element to give it the elevation specified by $zValue.
// The $zValue must be between 0 and 24.
@mixin mat-elevation($zValue) {
@mixin mat-elevation($zValue, $color: black) {
@if type-of($zValue) != number or not unitless($zValue) {
@error '$zValue must be a unitless number';
}
@if $zValue < 0 or $zValue > 24 {
@error '$zValue must be between 0 and 24';
}

box-shadow: #{map-get($_umbra-elevation-map, $zValue)},
#{map-get($_penumbra-elevation-map, $zValue)},
#{map-get($_ambient-elevation-map, $zValue)};
box-shadow: #{map-get(_get-umbra-map($color), $zValue)},
#{map-get(_get-penumbra-map($color), $zValue)},
#{map-get(_get-ambient-map($color), $zValue)};
}

// Applies the elevation to an element in a manner that allows
Expand Down