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feat(snackbar): add feature targeting for styles
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Adds support for feature targeting to the `mdc-snackbar` styles.

Relates to material-components#4227.
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@crisbeto
crisbeto committed Jul 8, 2019
1 parent 0657504 commit 8310b03
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250 changes: 223 additions & 27 deletions packages/mdc-snackbar/_mixins.scss
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// THE SOFTWARE.
//

@import "@material/feature-targeting/functions";
@import "@material/feature-targeting/mixins";
@import "@material/animation/functions";
@import "@material/button/mixins";
@import "@material/icon-button/mixins";
@import "@material/ripple/mixins";
@import "@material/rtl/mixins";
@import "@material/typography/mixins";
@import "@material/elevation/mixins";
@import "@material/shape/mixins";
@import "@material/theme/mixins";
@import "./variables";

@mixin mdc-snackbar-fill-color($color) {
@mixin mdc-snackbar-core-styles($query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);
$feat-animation: mdc-feature-create-target($query, animation);

// postcss-bem-linter: define snackbar
.mdc-snackbar {
@include mdc-snackbar-z-index($mdc-snackbar-z-index, $query: $query);
@include mdc-snackbar-viewport-margin($mdc-snackbar-viewport-margin-narrow, $query: $query);

@include mdc-feature-targets($feat-structure) {
display: none;
position: fixed;
right: 0;
bottom: 0;
left: 0;
align-items: center;
justify-content: center;
box-sizing: border-box;

// Ignore mouse events on the root layout element.
pointer-events: none;

// For some reason, iOS Safari displays a tap highlight on the entire snackbar element.
// Mobile Safari only supports `rgba` values for this property; named values like
// `transparent` are ignored. From Apple's docs:
// > This property obeys the alpha value, if specified.
// > If you don’t specify an alpha value, Safari on iOS applies a default alpha value to the color.
// > To disable tap highlighting, set the alpha value to 0 (invisible).
// > If you set the alpha value to 1.0 (opaque), the element is not visible when tapped.
// See https://github.com/ben-eb/postcss-colormin/issues/1
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
}

@at-root {
@include mdc-snackbar-fill-color($mdc-snackbar-fill-color, $query: $query);
@include mdc-snackbar-label-ink-color($mdc-snackbar-label-ink-color, $query: $query);
@include mdc-snackbar-min-width($mdc-snackbar-min-width, $query: $query);
@include mdc-snackbar-max-width($mdc-snackbar-max-width, $query: $query);
@include mdc-snackbar-elevation($mdc-snackbar-elevation, $query: $query);
@include mdc-snackbar-shape-radius($mdc-snackbar-shape-radius, $query: $query);
}

.mdc-snackbar--opening,
.mdc-snackbar--open,
.mdc-snackbar--closing {
@include mdc-feature-targets($feat-structure) {
display: flex;
}
}

.mdc-snackbar--leading {
@include mdc-snackbar-position-leading($query: $query);
}

.mdc-snackbar--stacked {
@include mdc-snackbar-layout-stacked($query: $query);
}

.mdc-snackbar__surface {
@include mdc-feature-targets($feat-structure) {
display: flex;
align-items: center;
justify-content: flex-start;
box-sizing: border-box;
transform: scale(.8);
opacity: 0;
}

.mdc-snackbar--open & {
@include mdc-feature-targets($feat-structure) {
transform: scale(1);
opacity: 1;
pointer-events: auto; // Allow mouse events on surface element while snackbar is open
}

@include mdc-feature-targets($feat-animation) {
transition:
mdc-animation-enter(opacity, $mdc-snackbar-enter-duration),
mdc-animation-enter(transform, $mdc-snackbar-enter-duration);
}
}

.mdc-snackbar--closing & {
@include mdc-feature-targets($feat-structure) {
transform: scale(1);
}

@include mdc-feature-targets($feat-animation) {
transition: mdc-animation-exit-permanent(opacity, $mdc-snackbar-exit-duration);
}
}
}

.mdc-snackbar__label {
@include mdc-typography($mdc-snackbar-label-type-scale, $query: $query);

@include mdc-feature-targets($feat-structure) {
flex-grow: 1;
box-sizing: border-box;
margin: 0;

// 14px top/bottom padding needed to make the height 48px.
padding: 14px 16px;
}
}

// Used to prevent visual jank when announcing label text to screen readers.
// See the `announce()` function in util.js for details.
.mdc-snackbar__label::before {
@include mdc-feature-targets($feat-structure) {
display: inline;
content: attr(data-mdc-snackbar-label-text);
}
}

.mdc-snackbar__actions {
@include mdc-feature-targets($feat-structure) {
@include mdc-rtl-reflexive-property(margin, 0, $mdc-snackbar-padding);

display: flex;
flex-shrink: 0;
align-items: center;
box-sizing: border-box;
}
}

.mdc-snackbar__action {
@include mdc-button-ink-color($mdc-snackbar-action-ink-color, $query: $query);
@include mdc-states($mdc-snackbar-action-ink-color, $query: $query);
}

.mdc-snackbar__dismiss {
@include mdc-icon-button-ink-color($mdc-snackbar-dismiss-ink-color, $query: $query);
}

// Two selectors are needed to increase specificity above `.material-icons`.
// stylelint-disable-next-line selector-class-pattern
.mdc-snackbar__dismiss.mdc-snackbar__dismiss {
@include mdc-icon-button-size($mdc-snackbar-dismiss-icon-size, $query: $query);
}

.mdc-snackbar__action + .mdc-snackbar__dismiss {
@include mdc-feature-targets($feat-structure) {
@include mdc-rtl-reflexive-property(margin, $mdc-snackbar-padding, 0);
}
}
// postcss-bem-linter: end
}

@mixin mdc-snackbar-fill-color($color, $query: mdc-feature-all()) {
$feat-color: mdc-feature-create-target($query, color);

.mdc-snackbar__surface {
@include mdc-theme-prop(background-color, $color);
@include mdc-feature-targets($feat-color) {
@include mdc-theme-prop(background-color, $color);
}
}
}

@mixin mdc-snackbar-label-ink-color($color) {
@mixin mdc-snackbar-label-ink-color($color, $query: mdc-feature-all()) {
$feat-color: mdc-feature-create-target($query, color);

.mdc-snackbar__label {
@include mdc-theme-prop(color, $color);
@include mdc-feature-targets($feat-color) {
@include mdc-theme-prop(color, $color);
}
}
}

@mixin mdc-snackbar-shape-radius($radius, $rtl-reflexive: false) {
@mixin mdc-snackbar-shape-radius($radius, $rtl-reflexive: false, $query: mdc-feature-all()) {
.mdc-snackbar__surface {
@include mdc-shape-radius($radius, $rtl-reflexive);
@include mdc-shape-radius($radius, $rtl-reflexive, $query: $query);
}
}

@mixin mdc-snackbar-min-width($min-width, $mobile-breakpoint: $mdc-snackbar-mobile-breakpoint) {
@mixin mdc-snackbar-min-width(
$min-width,
$mobile-breakpoint: $mdc-snackbar-mobile-breakpoint,
$query: mdc-feature-all()
) {
$feat-structure: mdc-feature-create-target($query, structure);

.mdc-snackbar__surface {
min-width: $min-width;
@include mdc-feature-targets($feat-structure) {
min-width: $min-width;

// The first media query ensures that snackbars are always 100% width on mobile devices, as required by the spec.
// The second media query prevents snackbars from being wider than the viewport for large min-width values.
@media (max-width: $mobile-breakpoint), (max-width: $min-width) {
min-width: 100%;
// The first media query ensures that snackbars are always 100% width on mobile devices, as required by the spec.
// The second media query prevents snackbars from being wider than the viewport for large min-width values.
@media (max-width: $mobile-breakpoint), (max-width: $min-width) {
min-width: 100%;
}
}
}
}

@mixin mdc-snackbar-max-width($max-width) {
@mixin mdc-snackbar-max-width($max-width, $query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);

.mdc-snackbar__surface {
max-width: $max-width;
@include mdc-feature-targets($feat-structure) {
max-width: $max-width;
}
}
}

@mixin mdc-snackbar-elevation($z-index) {
@mixin mdc-snackbar-elevation($z-index, $query: mdc-feature-all()) {
.mdc-snackbar__surface {
@include mdc-elevation($z-index);
@include mdc-elevation($z-index, $query: $query);
}
}

@mixin mdc-snackbar-viewport-margin($margin) {
margin: $margin;
@mixin mdc-snackbar-viewport-margin($margin, $query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);

@include mdc-feature-targets($feat-structure) {
margin: $margin;
}
}

@mixin mdc-snackbar-z-index($z-index) {
z-index: $z-index;
@mixin mdc-snackbar-z-index($z-index, $query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);

@include mdc-feature-targets($feat-structure) {
z-index: $z-index;
}
}

@mixin mdc-snackbar-position-leading {
justify-content: flex-start;
@mixin mdc-snackbar-position-leading($query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);

@include mdc-feature-targets($feat-structure) {
justify-content: flex-start;
}
}

@mixin mdc-snackbar-layout-stacked {
@mixin mdc-snackbar-layout-stacked($query: mdc-feature-all()) {
$feat-structure: mdc-feature-create-target($query, structure);

.mdc-snackbar__surface {
flex-direction: column;
align-items: flex-start;
@include mdc-feature-targets($feat-structure) {
flex-direction: column;
align-items: flex-start;
}
}

.mdc-snackbar__actions {
align-self: flex-end;
margin-bottom: $mdc-snackbar-padding;
@include mdc-feature-targets($feat-structure) {
align-self: flex-end;
margin-bottom: $mdc-snackbar-padding;
}
}
}
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