Material Web Team 3dbb73416f feat(switch, m3): migrate switch component, create demo
PiperOrigin-RevId: 398776037
2021-09-24 11:32:29 -07:00

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/**
* @license
* Copyright 2021 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
// stylelint-disable selector-class-pattern --
// Selector '.mdc-*' should only be used in this project.
@use 'sass:color';
@use 'sass:map';
@use 'sass:meta';
@use 'sass:list';
@use '@material/density/density';
@use '@material/dom/dom';
@use '@material/elevation/elevation-theme';
@use '@material/ripple/ripple-theme';
@use '@material/theme/color-palette';
@use '@material/theme/custom-properties';
@use '@material/theme/keys';
@use '@material/theme/shadow-dom';
@use '@material/theme/state';
@use '@material/theme/theme-color';
@use '@material/theme/theme';
@use '@material/tokens/resolvers';
@use '@material/shape/shape';
@use '@material/theme/map-ext';
@use './switch';
// PRIVATE PROPERTIES
//
/// TODO: Change to private when MWC has better access
/// @access private
$_density-config: (
size: (
minimum: 28px,
default: 48px,
maximum: 48px,
),
);
$_hairline: color-palette.$grey-300;
$_inverse-primary: color.scale(
theme-color.prop-value(primary),
$lightness: 75%
);
$_on-surface: color-palette.$grey-800;
$_on-surface-variant: color-palette.$grey-700;
$_on-surface-state-content: color-palette.$grey-900;
$_primary-state-content: color.scale(
theme-color.prop-value(primary),
$blackness: 50%
);
// PUBLIC PROPERTIES
$selectors: (
disabled: ':disabled',
focus: ':focus',
hover: ':hover',
pressed: ':active',
selected: '.mdc-switch--selected',
unselected: '.mdc-switch--unselected',
);
$light-theme: (
disabled-handle-elevation: 0,
disabled-handle-opacity: 0.38,
disabled-selected-handle-color: $_on-surface,
disabled-selected-icon-color: on-primary,
disabled-selected-icon-opacity: 0.38,
disabled-selected-track-color: $_on-surface,
disabled-track-opacity: 0.12,
disabled-unselected-handle-color: $_on-surface,
disabled-unselected-icon-color: on-primary,
disabled-unselected-icon-opacity: 0.38,
disabled-unselected-track-color: $_on-surface,
handle-elevation: 1,
handle-height: 20px,
handle-shadow-color: elevation-theme.$baseline-color,
handle-shape: 10px,
handle-surface-color: surface,
handle-width: 20px,
selected-focus-handle-color: $_primary-state-content,
selected-focus-state-layer-color: primary,
selected-focus-state-layer-opacity: 0.12,
selected-focus-track-color: $_inverse-primary,
selected-handle-color: primary,
selected-hover-handle-color: $_primary-state-content,
selected-hover-state-layer-color: primary,
selected-hover-state-layer-opacity: 0.04,
selected-hover-track-color: $_inverse-primary,
selected-icon-color: on-primary,
selected-icon-size: 18px,
selected-pressed-handle-color: $_primary-state-content,
selected-pressed-state-layer-color: primary,
selected-pressed-state-layer-opacity: 0.1,
selected-pressed-track-color: $_inverse-primary,
selected-track-color: $_inverse-primary,
state-layer-size: 48px,
track-height: 14px,
track-shape: 7px,
track-width: 36px,
unselected-focus-handle-color: $_on-surface-state-content,
unselected-focus-state-layer-color: $_on-surface,
unselected-focus-state-layer-opacity: 0.12,
unselected-focus-track-color: $_hairline,
unselected-handle-color: $_on-surface-variant,
unselected-hover-handle-color: $_on-surface-state-content,
unselected-hover-state-layer-color: $_on-surface,
unselected-hover-state-layer-opacity: 0.04,
unselected-hover-track-color: $_hairline,
unselected-icon-color: on-primary,
unselected-icon-size: 18px,
unselected-pressed-handle-color: $_on-surface-state-content,
unselected-pressed-state-layer-color: $_on-surface,
unselected-pressed-state-layer-opacity: 0.1,
unselected-pressed-track-color: $_hairline,
unselected-track-color: $_hairline,
);
$forced-colors-theme: (
disabled-handle-opacity: 1,
disabled-selected-icon-color: GrayText,
disabled-selected-icon-opacity: 1,
disabled-track-opacity: 1,
disabled-unselected-icon-color: GrayText,
disabled-unselected-icon-opacity: 1,
selected-icon-color: ButtonText,
unselected-icon-color: ButtonText,
);
// PUBLIC API
@mixin theme($theme, $resolvers: resolvers.$material) {
@include theme.validate-theme($light-theme, $theme);
// // TODO(b/185172301): replace with improved feature targeting
// IE11 Fallback
@if shadow-dom.$css-selector-fallback-declarations {
@include custom-properties.configure($emit-custom-properties: false) {
@include dom.ie11-support {
@include theme-styles($theme, $resolvers: $resolvers);
}
}
}
$theme: _resolve-theme($theme, $resolvers);
@include keys.declare-custom-properties($theme, switch);
}
@mixin theme-styles($theme) {
@include theme.validate-theme($light-theme, $theme);
$pair: map-ext.split(
$theme,
selected-focus-state-layer-color,
selected-focus-state-layer-opacity,
selected-hover-state-layer-color,
selected-hover-state-layer-opacity,
selected-pressed-state-layer-color,
selected-pressed-state-layer-opacity,
unselected-focus-state-layer-color,
unselected-focus-state-layer-opacity,
unselected-hover-state-layer-color,
unselected-hover-state-layer-opacity,
unselected-pressed-state-layer-color,
unselected-pressed-state-layer-opacity
);
$theme-without-ripple: list.nth($pair, 1);
@include theme-styles-without-ripple($theme-without-ripple);
$ripple-theme: list.nth($pair, 2);
$ripple-theme: keys.create-theme-properties($ripple-theme, switch);
@include state.selected($selectors) {
@include ripple-theme.theme(
(
focus-state-layer-color:
map.get($ripple-theme, selected-focus-state-layer-color),
focus-state-layer-opacity:
map.get($ripple-theme, selected-focus-state-layer-opacity),
hover-state-layer-color:
map.get($ripple-theme, selected-hover-state-layer-color),
hover-state-layer-opacity:
map.get($ripple-theme, selected-hover-state-layer-opacity),
pressed-state-layer-color:
map.get($ripple-theme, selected-pressed-state-layer-color),
pressed-state-layer-opacity:
map.get($ripple-theme, selected-pressed-state-layer-opacity),
)
);
// TODO(b/191298796): ripple-theme does not currently support setting
// state layer colors other than hover. Remove this section when bug is
// resolved.
@include state.focus($selectors) {
@include ripple-theme.theme(
(
hover-state-layer-color:
map.get($ripple-theme, selected-focus-state-layer-color),
)
);
}
@include state.pressed($selectors) {
@include ripple-theme.theme(
(
hover-state-layer-color:
map.get($ripple-theme, selected-pressed-state-layer-color),
)
);
}
}
@include state.unselected($selectors) {
@include ripple-theme.theme(
(
focus-state-layer-color:
map.get($ripple-theme, unselected-focus-state-layer-color),
focus-state-layer-opacity:
map.get($ripple-theme, unselected-focus-state-layer-opacity),
hover-state-layer-color:
map.get($ripple-theme, unselected-hover-state-layer-color),
hover-state-layer-opacity:
map.get($ripple-theme, unselected-hover-state-layer-opacity),
pressed-state-layer-color:
map.get($ripple-theme, unselected-pressed-state-layer-color),
pressed-state-layer-opacity:
map.get($ripple-theme, unselected-pressed-state-layer-opacity),
)
);
// TODO(b/191298796): ripple-theme does not currently support setting
// state layer colors other than hover. Remove this section when bug is
// resolved.
@include state.focus($selectors) {
@include ripple-theme.theme(
(
hover-state-layer-color:
map.get($ripple-theme, unselected-focus-state-layer-color),
)
);
}
@include state.pressed($selectors) {
@include ripple-theme.theme(
(
hover-state-layer-color:
map.get($ripple-theme, unselected-pressed-state-layer-color),
)
);
}
}
}
@mixin theme-styles-without-ripple($theme, $resolvers: resolvers.$material) {
@include theme.validate-theme($light-theme, $theme);
$theme: keys.create-theme-properties($theme, switch);
@include _selected-handle-color(
(
default: map.get($theme, selected-handle-color),
disabled: map.get($theme, disabled-selected-handle-color),
focus: map.get($theme, selected-focus-handle-color),
hover: map.get($theme, selected-hover-handle-color),
pressed: map.get($theme, selected-pressed-handle-color),
)
);
@include _unselected-handle-color(
(
default: map.get($theme, unselected-handle-color),
disabled: map.get($theme, disabled-unselected-handle-color),
focus: map.get($theme, unselected-focus-handle-color),
hover: map.get($theme, unselected-hover-handle-color),
pressed: map.get($theme, unselected-pressed-handle-color),
)
);
@include _handle-surface-color(map.get($theme, handle-surface-color));
@include _handle-elevation(
map.get($resolvers, elevation),
map.get($theme, handle-shadow-color),
(
default: map.get($theme, handle-elevation),
disabled: map.get($theme, disabled-handle-elevation),
)
);
@include _handle-height(map.get($theme, handle-height));
@include _handle-opacity(
(
disabled: map.get($theme, disabled-handle-opacity),
)
);
@include _handle-shape(map.get($theme, handle-shape));
@include _handle-width(map.get($theme, handle-width));
@include _selected-icon-color(
(
default: map.get($theme, selected-icon-color),
disabled: map.get($theme, disabled-selected-icon-color),
)
);
@include _unselected-icon-color(
(
default: map.get($theme, unselected-icon-color),
disabled: map.get($theme, disabled-unselected-icon-color),
)
);
@include _selected-icon-opacity(
(
disabled: map.get($theme, disabled-selected-icon-opacity),
)
);
@include _unselected-icon-opacity(
(
disabled: map.get($theme, disabled-unselected-icon-opacity),
)
);
@include _selected-icon-size(map.get($theme, selected-icon-size));
@include _unselected-icon-size(map.get($theme, unselected-icon-size));
@include _selected-ripple-color(
(
focus: map.get($theme, selected-focus-state-layer-color),
hover: map.get($theme, selected-hover-state-layer-color),
pressed: map.get($theme, selected-pressed-state-layer-color),
)
);
@include _unselected-ripple-color(
(
focus: map.get($theme, unselected-focus-state-layer-color),
hover: map.get($theme, unselected-hover-state-layer-color),
pressed: map.get($theme, unselected-pressed-state-layer-color),
)
);
@include _selected-ripple-opacity(
(
focus: map.get($theme, selected-focus-state-layer-opacity),
hover: map.get($theme, selected-hover-state-layer-opacity),
pressed: map.get($theme, selected-pressed-state-layer-opacity),
)
);
@include _unselected-ripple-opacity(
(
focus: map.get($theme, unselected-focus-state-layer-opacity),
hover: map.get($theme, unselected-hover-state-layer-opacity),
pressed: map.get($theme, unselected-pressed-state-layer-opacity),
)
);
@include _state-layer-size(map.get($theme, state-layer-size));
@include _track-height(map.get($theme, track-height));
@include _track-opacity(
(
disabled: map.get($theme, disabled-track-opacity),
)
);
@include _track-selected-color(
(
default: map.get($theme, selected-track-color),
disabled: map.get($theme, disabled-selected-track-color),
focus: map.get($theme, selected-focus-track-color),
hover: map.get($theme, selected-hover-track-color),
pressed: map.get($theme, selected-pressed-track-color),
)
);
@include _track-unselected-color(
(
default: map.get($theme, unselected-track-color),
disabled: map.get($theme, disabled-unselected-track-color),
focus: map.get($theme, unselected-focus-track-color),
hover: map.get($theme, unselected-hover-track-color),
pressed: map.get($theme, unselected-pressed-track-color),
)
);
@include _track-shape(map.get($theme, track-shape));
@include _track-width(map.get($theme, track-width));
}
@function density($density-scale) {
$size: density.prop-value(
$density-config: $_density-config,
$density-scale: $density-scale,
$property-name: size,
);
@return (state-layer-size: $size);
}
// PRIVATE API
@mixin _handle-color($colors) {
@include state.default($selectors) {
@include _set-handle-color(state.get-default-state($colors));
}
@include state.hover($selectors) {
@include _set-handle-color(state.get-hover-state($colors));
}
@include state.focus($selectors) {
@include _set-handle-color(state.get-focus-state($colors));
}
@include state.pressed($selectors) {
@include _set-handle-color(state.get-pressed-state($colors));
}
@include state.disabled($selectors) {
@include _set-handle-color(state.get-disabled-state($colors));
}
}
@mixin _set-handle-color($color) {
.mdc-switch__handle {
&::after {
@include theme.property(background, $color);
}
}
}
@mixin _selected-handle-color($colors) {
@include state.selected($selectors) {
@include _handle-color($colors);
}
}
@mixin _unselected-handle-color($colors) {
@include state.unselected($selectors) {
@include _handle-color($colors);
}
}
@mixin _handle-surface-color($color) {
.mdc-switch__handle {
// Sets the surface color for the handle. This is used so that when an
// opacity is applied to the "main" handle color, it will not bleed through
// and appear transparent on top of the track.
&::before {
@include theme.property(background, $color);
}
}
}
@mixin _handle-elevation($resolver, $shadow-color, $elevations) {
@include state.default($selectors) {
@include _set-handle-elevation(
$resolver,
$elevation: state.get-default-state($elevations),
$shadow-color: $shadow-color
);
}
@include state.disabled($selectors) {
@include _set-handle-elevation(
$resolver,
$elevation: state.get-disabled-state($elevations),
$shadow-color: $shadow-color
);
}
}
@mixin _set-handle-elevation($resolver, $args...) {
.mdc-switch__shadow {
@include elevation-theme.with-resolver($resolver, $args...);
}
}
@mixin _handle-height($height) {
.mdc-switch__handle {
@include theme.property(height, $height);
}
}
@mixin _handle-opacity($opacities) {
@include state.disabled($selectors) {
@include _set-handle-opacity(state.get-disabled-state($opacities));
}
}
@mixin _set-handle-opacity($opacity) {
.mdc-switch__handle {
// Only apply to the ::after pseudo element, which is the handle's "main"
// color. The ::before pseudo element is the surface color, which prevents
// the handle from bleeding through on the track.
&::after {
@include theme.property(opacity, $opacity);
}
}
}
@mixin _handle-shape($shape) {
.mdc-switch__handle {
@include shape.radius($shape);
}
}
@mixin _handle-width($width) {
.mdc-switch__handle {
@include theme.property(width, $width);
}
.mdc-switch__handle-track {
@include theme.property(
width,
calc(100% - width),
$replace: (width: $width)
);
}
}
@mixin _icon-color($colors) {
@include state.default($selectors) {
@include _set-icon-color(state.get-default-state($colors));
}
@include state.disabled($selectors) {
@include _set-icon-color(state.get-disabled-state($colors));
}
}
@mixin _set-icon-color($color) {
.mdc-switch__icon {
@include theme.property(fill, $color);
}
}
@mixin _selected-icon-color($colors) {
@include state.selected($selectors) {
@include _icon-color($colors);
}
}
@mixin _unselected-icon-color($colors) {
@include state.unselected($selectors) {
@include _icon-color($colors);
}
}
@mixin _icon-opacity($opacities) {
@include state.disabled($selectors) {
@include _set-icon-opacity(state.get-disabled-state($opacities));
}
}
@mixin _set-icon-opacity($opacity) {
.mdc-switch__icons {
@include theme.property(opacity, $opacity);
}
}
@mixin _selected-icon-opacity($opacities) {
@include state.selected($selectors) {
@include _icon-opacity($opacities);
}
}
@mixin _unselected-icon-opacity($opacities) {
@include state.unselected($selectors) {
@include _icon-opacity($opacities);
}
}
@mixin _icon-size($size) {
.mdc-switch__icon {
@include theme.property(width, $size);
@include theme.property(height, $size);
}
}
@mixin _selected-icon-size($size) {
@include state.selected($selectors) {
@include _icon-size($size);
}
}
@mixin _unselected-icon-size($size) {
@include state.unselected($selectors) {
@include _icon-size($size);
}
}
@mixin _ripple-color($colors) {
@include state.independent-elements(pressed) {
@include state.hover($selectors) {
@include ripple-theme.states-base-color(
state.get-hover-state($colors),
$ripple-target: switch.$ripple-target
);
}
@include state.focus($selectors) {
@include ripple-theme.states-base-color(
state.get-focus-state($colors),
$ripple-target: switch.$ripple-target
);
}
@include state.pressed($selectors) {
@include ripple-theme.states-base-color(
state.get-pressed-state($colors),
$ripple-target: switch.$ripple-target
);
}
}
}
@mixin _selected-ripple-color($colors) {
@include state.selected($selectors) {
@include _ripple-color($colors);
}
}
@mixin _unselected-ripple-color($colors) {
@include state.unselected($selectors) {
@include _ripple-color($colors);
}
}
@mixin _ripple-opacity($opacities) {
@include state.independent-elements(pressed) {
@include state.hover($selectors) {
@include ripple-theme.states-hover-opacity(
state.get-hover-state($opacities),
$ripple-target: switch.$ripple-target
);
}
@include state.focus($selectors) {
@include ripple-theme.states-focus-opacity(
state.get-focus-state($opacities),
$ripple-target: switch.$ripple-target
);
}
@include state.pressed($selectors) {
@include ripple-theme.states-press-opacity(
state.get-pressed-state($opacities),
$ripple-target: switch.$ripple-target
);
}
}
}
@mixin _selected-ripple-opacity($opacities) {
@include state.selected($selectors) {
@include _ripple-opacity($opacities);
}
}
@mixin _unselected-ripple-opacity($opacities) {
@include state.unselected($selectors) {
@include _ripple-opacity($opacities);
}
}
@mixin _state-layer-size($size) {
.mdc-switch__ripple {
@include theme.property(height, $size);
@include theme.property(width, $size);
}
}
@mixin _track-height($height) {
.mdc-switch__track {
@include theme.property(height, $height);
}
}
@mixin _track-opacity($opacities) {
@include state.disabled($selectors) {
@include _set-track-opacity(state.get-disabled-state($opacities));
}
}
@mixin _set-track-opacity($opacity) {
.mdc-switch__track {
@include theme.property(opacity, $opacity);
}
}
@mixin _track-selected-color($colors) {
@include state.default($selectors) {
@include _set-track-selected-color(state.get-default-state($colors));
}
@include state.hover($selectors) {
@include _set-track-selected-color(state.get-hover-state($colors));
}
@include state.focus($selectors) {
@include _set-track-selected-color(state.get-focus-state($colors));
}
@include state.pressed($selectors) {
@include _set-track-selected-color(state.get-pressed-state($colors));
}
@include state.disabled($selectors) {
@include _set-track-selected-color(state.get-disabled-state($colors));
}
}
@mixin _set-track-selected-color($color) {
.mdc-switch__track::after {
@include theme.property(background, $color);
}
}
@mixin _track-unselected-color($colors) {
@include state.default($selectors) {
@include _set-track-unselected-color(state.get-default-state($colors));
}
@include state.hover($selectors) {
@include _set-track-unselected-color(state.get-hover-state($colors));
}
@include state.focus($selectors) {
@include _set-track-unselected-color(state.get-focus-state($colors));
}
@include state.pressed($selectors) {
@include _set-track-unselected-color(state.get-pressed-state($colors));
}
@include state.disabled($selectors) {
@include _set-track-unselected-color(state.get-disabled-state($colors));
}
}
@mixin _set-track-unselected-color($color) {
.mdc-switch__track::before {
@include theme.property(background, $color);
}
}
@mixin _track-shape($shape) {
.mdc-switch__track {
@include shape.radius($shape);
}
}
@mixin _track-width($width) {
@include theme.property(width, $width);
}
@function _resolve-theme($theme, $resolvers) {
@return map.merge(
$theme,
_resolve-theme-handle-elevation(
$theme,
map.get($resolvers, elevation),
disabled-handle-elevation,
handle-elevation
)
);
}
@function _resolve-theme-handle-elevation($theme, $resolver, $keys...) {
@if $resolver == null {
@return $theme;
}
@each $key in $keys {
// Resolve the value for each state key.
$resolved-value: meta.call(
$resolver,
$elevation: map.get($theme, $key),
$shadow-color: map.get($theme, handle-shadow-color)
);
// Update the theme with the resolved value.
$theme: map.set($theme, $key, $resolved-value);
}
@return $theme;
}