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fix(slide-toggle): fix and simplify high contrast styles #18104

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Merged
merged 1 commit into from
Jan 8, 2020
Merged

fix(slide-toggle): fix and simplify high contrast styles #18104

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35 changes: 9 additions & 26 deletions src/material/slide-toggle/slide-toggle.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -217,34 +217,17 @@ $mat-slide-toggle-bar-track-width: $mat-slide-toggle-bar-width - $mat-slide-togg
}

/** Custom styling to make the slide-toggle usable in high contrast mode. */
@include cdk-high-contrast() {
.mat-slide-toggle-thumb {
background: #fff;
border: 1px solid #000;

.mat-slide-toggle.mat-checked & {
background: #000;
border: 1px solid #fff;
}
}

@include cdk-high-contrast {
.mat-slide-toggle-thumb,
.mat-slide-toggle-bar {
background: #fff;

// As a focus indication in high contrast mode, we add a dotted outline to the slide-toggle
// bar. Since the bar element does not have any padding, we need to specify an outline offset
// because otherwise the opaque thumb element will hide the outline.
.mat-slide-toggle.cdk-keyboard-focused & {
outline: 1px dotted;
outline-offset: ($mat-slide-toggle-height - $mat-slide-toggle-bar-height) / 2;
}
border: 1px solid;
}
}

// Since the bar with a white background will be placed on a white background, we need to a black
// border in order to make sure that the bar is visible.
@include cdk-high-contrast(black-on-white) {
.mat-slide-toggle-bar {
border: 1px solid #000;
// As a focus indication in high contrast mode, we add a dotted outline to the slide-toggle
// bar. Since the bar element does not have any padding, we need to specify an outline offset
// because otherwise the opaque thumb element will hide the outline.
.mat-slide-toggle.cdk-keyboard-focused .mat-slide-toggle-bar {
outline: 2px dotted;
outline-offset: ($mat-slide-toggle-height - $mat-slide-toggle-bar-height) / 2;
}
}