fix(styles): HCM on form validation icons

.changeset/metal-geese-swim.md

@@ -0,0 +1,5 @@
+---
+'@swisspost/design-system-styles': patch
+---
+
+Fixed colors of validation icon in HCM on form elements.

packages/styles/src/components/form-input.scss

@@ -192,13 +192,7 @@ input.form-control {
     }
   }
 
-  &.is-valid:not(:disabled) {
-    background-image: forms.$valid-icon;
-  }
-
-  &.is-invalid:not(:disabled) {
-    background-image: forms.$invalid-icon;
-  }
+  @include forms-mx.validation-icons;
 }
 
 .form-label:has(+ input.form-control[disabled]) {

packages/styles/src/components/form-select.scss

@@ -1,10 +1,12 @@
 @forward './../variables/options';
 
 @use './../mixins/utilities';
-@use './../mixins/forms';
+@use './../functions/forms' as forms-fx;
+@use './../mixins/forms' as forms-mx;
 @use './../functions/tokens';
 @use './../tokens/components';
 @use './../tokens/elements';
+@use './../variables/components/forms';
 
 tokens.$default-map: components.$post-select;
 
@@ -26,7 +28,7 @@ tokens.$default-map: components.$post-select;
   border-color: tokens.get('select-color-enabled-border');
   border-radius: tokens.get('select-border-radius');
   color: tokens.get('select-color-enabled-fg');
-  @include forms.select-bg-image('enabled');
+  background-image: forms-fx.select-arrow-icon('enabled');
 
   &:disabled {
     opacity: 1;
@@ -36,7 +38,7 @@ tokens.$default-map: components.$post-select;
     border-style: tokens.get('select-border-style-disabled');
 
     &:not([multiple]) {
-      @include forms.select-bg-image('disabled');
+      background-image: forms-fx.select-arrow-icon('disabled');
     }
   }
 
@@ -45,7 +47,7 @@ tokens.$default-map: components.$post-select;
       background-color: tokens.get('select-color-selected-bg');
       color: tokens.get('select-color-selected-fg');
       border-color: tokens.get('select-color-selected-border');
-      @include forms.select-bg-image('selected');
+      background-image: forms-fx.select-arrow-icon('selected');
 
       @include utilities.focus-style;
 
@@ -60,7 +62,7 @@ tokens.$default-map: components.$post-select;
       border-color: tokens.get('select-color-hover-border');
 
       &:not([multiple]) {
-        @include forms.select-bg-image('hover');
+        background-image: forms-fx.select-arrow-icon('hover');
       }
 
       @include utilities.high-contrast-mode {
@@ -90,29 +92,53 @@ tokens.$default-map: components.$post-select;
   }
 
   &.is-valid:not(:disabled) {
-    @include forms.select-bg-image('enabled', 'valid');
+    background-image: forms-fx.select-arrow-icon('enabled'), forms.$valid-icon;
 
     &:focus {
-      @include forms.select-bg-image('selected', 'valid');
+      background-image: forms-fx.select-arrow-icon('selected'), forms.$valid-icon;
     }
 
     &:hover {
       &:not([multiple]) {
-        @include forms.select-bg-image('hover', 'valid');
+        background-image: forms-fx.select-arrow-icon('hover'), forms.$valid-icon;
+      }
+    }
+
+    &,
+    &:hover:not([multiple]),
+    &:focus {
+      @include utilities.high-contrast-mode-dark() {
+        background-image: forms-fx.select-arrow-icon('enabled'), forms-fx.valid-icon('#e0e0e0');
+      }
+
+      @include utilities.high-contrast-mode-light() {
+        background-image: forms-fx.select-arrow-icon('enabled'), forms-fx.valid-icon('#333333');
       }
     }
   }
 
   &.is-invalid:not(:disabled) {
-    @include forms.select-bg-image('enabled', 'invalid');
+    background-image: forms-fx.select-arrow-icon('enabled'), forms.$invalid-icon;
 
     &:focus {
-      @include forms.select-bg-image('selected', 'invalid');
+      background-image: forms-fx.select-arrow-icon('selected'), forms.$invalid-icon;
     }
 
     &:hover {
       &:not([multiple]) {
-        @include forms.select-bg-image('hover', 'invalid');
+        background-image: forms-fx.select-arrow-icon('hover'), forms.$invalid-icon;
+      }
+    }
+
+    &,
+    &:hover:not([multiple]),
+    &:focus {
+      @include utilities.high-contrast-mode-dark() {
+        background-image: forms-fx.select-arrow-icon('enabled'), forms-fx.invalid-icon('#e0e0e0');
+      }
+
+      @include utilities.high-contrast-mode-light() {
+        background-image: forms-fx.select-arrow-icon('enabled'), forms-fx.invalid-icon('#333333');
       }
     }
   }
@@ -126,13 +152,7 @@ tokens.$default-map: components.$post-select;
       background-position: center right tokens.get('select-validation-icon-position-inline-end');
     }
 
-    &.is-valid:not(:disabled) {
-      @include forms.select-bg-image($validation: 'valid');
-    }
-
-    &.is-invalid:not(:disabled) {
-      @include forms.select-bg-image($validation: 'invalid');
-    }
+    @include forms-mx.validation-icons();
   }
 }
 
@@ -224,43 +244,43 @@ tokens.$default-map: components.$post-select;
 
 [data-color-scheme='dark'] {
   .form-select:not([multiple]) {
-    @include forms.select-bg-image('enabled', null, 'dark');
+    background-image: forms-fx.select-arrow-icon('enabled', 'dark');
 
     &:disabled {
-      @include forms.select-bg-image('disabled', null, 'dark');
+      background-image: forms-fx.select-arrow-icon('disabled', 'dark');
     }
 
     &:not(:disabled) {
       &:focus {
-        @include forms.select-bg-image('selected', null, 'dark');
+        background-image: forms-fx.select-arrow-icon('selected', 'dark');
       }
 
       &:hover {
-        @include forms.select-bg-image('hover', null, 'dark');
+        background-image: forms-fx.select-arrow-icon('hover', 'dark');
       }
     }
 
     &.is-valid:not(:disabled) {
-      @include forms.select-bg-image('enabled', 'valid', 'dark');
+      background-image: forms-fx.select-arrow-icon('enabled', 'dark'), forms.$valid-icon;
 
       &:focus {
-        @include forms.select-bg-image('selected', 'valid', 'dark');
+        background-image: forms-fx.select-arrow-icon('selected', 'dark'), forms.$valid-icon;
       }
 
       &:hover {
-        @include forms.select-bg-image('hover', 'valid', 'dark');
+        background-image: forms-fx.select-arrow-icon('hover', 'dark'), forms.$valid-icon;
       }
     }
 
     &.is-invalid:not(:disabled) {
-      @include forms.select-bg-image('enabled', 'invalid', 'dark');
+      background-image: forms-fx.select-arrow-icon('enabled', 'dark'), forms.$invalid-icon;
 
       &:focus {
-        @include forms.select-bg-image('selected', 'invalid', 'dark');
+        background-image: forms-fx.select-arrow-icon('selected', 'dark'), forms.$invalid-icon;
       }
 
       &:hover {
-        @include forms.select-bg-image('hover', 'invalid', 'dark');
+        background-image: forms-fx.select-arrow-icon('hover', 'dark'), forms.$invalid-icon;
       }
     }
   }

packages/styles/src/components/form-textarea.scss

@@ -86,13 +86,7 @@ textarea.form-control {
     }
   }
 
-  &.is-valid:not(:disabled) {
-    background-image: forms.$valid-icon;
-  }
-
-  &.is-invalid:not(:disabled) {
-    background-image: forms.$invalid-icon;
-  }
+  @include forms-mx.validation-icons;
 }
 
 .form-label:has(+ textarea.form-control[disabled]) {

packages/styles/src/functions/_forms.scss

@@ -1,7 +1,12 @@
-// Source: https://kovart.github.io/dashed-border-generator/ + added stroke-vector-effect
+@use 'sass:map';
+
 @use './color';
 @use '../functions/tokens';
+@use '../functions/icons';
+@use '../functions/utilities';
+@use '../variables/components/forms';
 
+// Source: https://kovart.github.io/dashed-border-generator/ + added stroke-vector-effect
 @function get-background-svg-stroke(
   $type,
   $color,
@@ -25,3 +30,39 @@
     $svg-additional-attributes + " fill='none' stroke='" + #{color.encode-uri-color($color)} + "' stroke-width='" +
     $stroke-width "' stroke-dasharray='" + $stroke-dasharray + "'" + $stroke-pathlength-attribute + ' /%3e%3c/svg%3e';
 }
+
+@function select-arrow-icon($state: null, $mode: 'light') {
+  // Hardcoded colors because CSS variables cannot be used as fill color of background-image
+  $arrow-color-map: (
+    'enabled-light': #050400,
+    'enabled-dark': #fff,
+    'hover-light': #504f4b,
+    'hover-dark': #fff,
+    'selected-light': #050400,
+    'selected-dark': #fff,
+    'disabled-light': #696864,
+    'disabled-dark': #fff,
+  );
+
+  @if ($state) {
+    $state: url('#{icons.get-colored-svg-url('2052', map.get($arrow-color-map, '#{$state}-#{$mode}'))}');
+  }
+
+  @return $state;
+}
+
+@function encode-color($color) {
+  @return utilities.replace($color, '#', '%23');
+}
+
+@function valid-icon($color) {
+  $encoded-color: encode-color($color);
+  $icon: utilities.replace(forms.$valid-icon, '%23107800', $encoded-color);
+  @return $icon;
+}
+
+@function invalid-icon($color) {
+  $encoded-color: encode-color($color);
+  $icon: utilities.replace(forms.$invalid-icon, '%23B20000', $encoded-color);
+  @return $icon;
+}

packages/styles/src/mixins/_forms.scss

@@ -2,6 +2,7 @@
 @use './../variables/components/forms';
 @use './../mixins/utilities';
 @use './../functions/icons';
+@use './../functions/forms' as forms-fx;
 @use './../functions/utilities' as utilities-fx;
 
 // Placeholder in input fields
@@ -30,29 +31,31 @@
   }
 }
 
-@mixin select-bg-image($state: null, $validation: null, $mode: 'light') {
-  // Hardcoded colors because CSS variables cannot be used as fill color of background-image
-  $arrow-color-map: (
-    'enabled-light': #050400,
-    'enabled-dark': #fff,
-    'hover-light': #504f4b,
-    'hover-dark': #fff,
-    'selected-light': #050400,
-    'selected-dark': #fff,
-    'disabled-light': #696864,
-    'disabled-dark': #fff,
-  );
+// Used on form elements to set the correct colored validation icon
+@mixin validation-icons() {
+  &.is-valid:not(:disabled) {
+    background-image: forms.$valid-icon;
 
-  @if ($validation == 'valid') {
-    $validation: forms.$valid-icon;
-  } @else if ($validation == 'invalid') {
-    $validation: forms.$invalid-icon;
+    @include utilities.high-contrast-mode-dark() {
+      background-image: forms-fx.valid-icon('#e0e0e0');
+    }
+
+    @include utilities.high-contrast-mode-light() {
+      background-image: forms-fx.valid-icon('#333333');
+    }
   }
 
-  @if ($state) {
-    $state: url('#{icons.get-colored-svg-url('2052', map.get($arrow-color-map, '#{$state}-#{$mode}'))}');
+  &.is-invalid:not(:disabled) {
+    background-image: forms.$invalid-icon;
+
+    @include utilities.high-contrast-mode-dark() {
+      background-image: forms-fx.invalid-icon('#e0e0e0');
+    }
+
+    @include utilities.high-contrast-mode-light() {
+      background-image: forms-fx.invalid-icon('#333333');
+    }
   }
-  background-image: $state, $validation;
 }
 
 @mixin textarea-resizer-svg($color) {

packages/styles/src/mixins/_utilities.scss

@@ -82,6 +82,20 @@
   }
 }
 
+@mixin high-contrast-mode-dark() {
+  @media (forced-colors: active) and (prefers-color-scheme: dark),
+    (-ms-high-contrast: white-on-black) {
+    @content;
+  }
+}
+
+@mixin high-contrast-mode-light() {
+  @media (forced-colors: active) and (prefers-color-scheme: light),
+    (-ms-high-contrast: black-on-white) {
+    @content;
+  }
+}
+
 @mixin not-disabled-focus-hover {
   &:focus,
   &:not(:disabled):hover,