feat(sbb-stepper): add size 's' (#3026)

src/elements/stepper/step-label/step-label.scss

@@ -13,6 +13,7 @@
   --sbb-step-label-prefix-border-style: solid;
   --sbb-step-label-prefix-border-color: var(--sbb-color-cloud);
   --sbb-step-label-prefix-background-color: var(--sbb-color-white);
+  --sbb-step-label-gap: var(--sbb-spacing-fixed-4x);
 
   position: relative;
   min-width: 0;
@@ -57,6 +58,20 @@
   }
 }
 
+:host([data-size='s']) {
+  --sbb-step-label-gap: var(--sbb-spacing-fixed-3x);
+  --sbb-step-label-prefix-size: var(--sbb-size-element-xxxs);
+
+  &::before {
+    // The `--sbb-font-size-text-m` is beign used here to align the bubble's inner text to
+    // the label text which includes the `sbb.text-m--bold` mixin.
+    inset-block-start: calc(
+      var(--sbb-font-size-text-m) * (var(--sbb-typo-line-height-body-text) / 2) +
+        (var(--sbb-border-width-1x) / 2)
+    );
+  }
+}
+
 :host([disabled]) {
   --sbb-step-label-color: var(--sbb-color-granite);
   --sbb-step-label-prefix-border-style: dashed;
@@ -100,8 +115,12 @@
   cursor: var(--sbb-step-label-cursor);
   position: relative;
   display: flex;
-  gap: var(--sbb-spacing-fixed-4x);
+  gap: var(--sbb-step-label-gap);
   color: var(--sbb-step-label-color);
+
+  :host([data-size='s']) & {
+    @include sbb.text-m--bold;
+  }
 }
 
 .sbb-step-label__prefix {

src/elements/stepper/stepper/__snapshots__/stepper.snapshot.spec.snap.js

@@ -6,13 +6,15 @@ snapshots["sbb-stepper renders DOM"] =
   data-disable-animation=""
   orientation="horizontal"
   selected-index="0"
+  size="m"
 >
   <sbb-step-label
     aria-controls="sbb-step-0"
     data-action=""
     data-button=""
     data-orientation="horizontal"
     data-selected=""
+    data-size="m"
     dir="ltr"
     id="sbb-step-label-0"
     role="tab"
@@ -36,6 +38,7 @@ snapshots["sbb-stepper renders DOM"] =
     data-action=""
     data-button=""
     data-orientation="horizontal"
+    data-size="m"
     dir="ltr"
     id="sbb-step-label-1"
     role="tab"
@@ -59,6 +62,7 @@ snapshots["sbb-stepper renders DOM"] =
     data-button=""
     data-disabled=""
     data-orientation="horizontal"
+    data-size="m"
     dir="ltr"
     disabled=""
     id="sbb-step-label-2"

src/elements/stepper/stepper/readme.md

@@ -110,6 +110,7 @@ Use an `aria-label` attribute to describe the purpose of the stepper. The `sbb-s
 | `orientation`    | `orientation`     | public  | `SbbOrientation`                 | `'horizontal'` | Steps orientation, either horizontal or vertical.                                 |
 | `selected`       | -                 | public  | `SbbStepElement \| undefined`    |                | The currently selected step.                                                      |
 | `selectedIndex`  | `selected-index`  | public  | `number \| undefined`            |                | The currently selected step index.                                                |
+| `size`           | `size`            | public  | `'s' \| 'm'`                     | `'m'`          | Size variant, either s or m.                                                      |
 | `steps`          | -                 | public  | `SbbStepElement[]`               |                | The steps of the stepper.                                                         |
 
 ## Methods

src/elements/stepper/stepper/stepper.spec.ts

@@ -397,4 +397,15 @@ describe('sbb-stepper', () => {
     expect(stepLabelThree).to.have.attribute('data-selected');
     expect(stepLabelThree.step).to.have.attribute('data-selected');
   });
+
+  it('proxy size to step children', async () => {
+    const stepLabels = Array.from(element.querySelectorAll<SbbStepLabelElement>('sbb-step-label')!);
+
+    expect(stepLabels.every((l) => l.getAttribute('data-size') === element.size)).to.be.true;
+
+    element.size = 's';
+    await waitForLitRender(element);
+
+    expect(stepLabels.every((l) => l.getAttribute('data-size') === element.size)).to.be.true;
+  });
 });

src/elements/stepper/stepper/stepper.stories.ts

@@ -47,16 +47,25 @@ const horizontalFrom: InputType = {
   options: ['unset', 'zero', 'micro', 'small', 'medium', 'large', 'wide', 'ultra'],
 };
 
+const size: InputType = {
+  control: {
+    type: 'inline-radio',
+  },
+  options: ['s', 'm'],
+};
+
 const defaultArgTypes: ArgTypes = {
   linear,
   orientation,
   'horizontal-from': horizontalFrom,
+  size,
 };
 
 const defaultArgs: Args = {
   linear: false,
   orientation: 'horizontal',
   'horizontal-from': 'unset',
+  size: size.options![1],
 };
 
 const codeStyle: Args = {
@@ -356,6 +365,12 @@ export const Vertical: StoryObj = {
   args: { ...defaultArgs, orientation: orientation.options![1] },
 };
 
+export const SizeS: StoryObj = {
+  render: Template,
+  argTypes: defaultArgTypes,
+  args: { ...defaultArgs, size: size.options![0] },
+};
+
 export const HorizontalFromSmall: StoryObj = {
   render: Template,
   argTypes: defaultArgTypes,

src/elements/stepper/stepper/stepper.ts

@@ -48,6 +48,9 @@ export class SbbStepperElement extends SbbHydrationMixin(LitElement) {
   @property({ reflect: true })
   public orientation: SbbOrientation = 'horizontal';
 
+  /** Size variant, either s or m. */
+  @property({ reflect: true }) public size: 's' | 'm' = 'm';
+
   /** The currently selected step. */
   @property({ attribute: false })
   public set selected(step: SbbStepElement) {
@@ -200,6 +203,7 @@ export class SbbStepperElement extends SbbHydrationMixin(LitElement) {
         label.configure(i + 1, array.length, this._loaded);
       });
     this._select(this.selected || this._enabledSteps[0]);
+    this._proxySize();
   }
 
   private _updateLabels(): void {
@@ -271,6 +275,17 @@ export class SbbStepperElement extends SbbHydrationMixin(LitElement) {
     if (changedProperties.has('linear') && this._loaded) {
       this._configureLinearMode();
     }
+
+    if (changedProperties.has('size')) {
+      this._proxySize();
+      this._setMarkerSize();
+    }
+  }
+
+  private _proxySize(): void {
+    this.steps.forEach((step) => {
+      step.label?.setAttribute('data-size', this.size);
+    });
   }
 
   private _handleKeyDown(evt: KeyboardEvent): void {

src/elements/stepper/stepper/stepper.visual.spec.ts

@@ -25,12 +25,14 @@ describe(`sbb-stepper`, () => {
     orientation?: string,
     longLabel?: boolean,
     horizontalFrom?: string,
+    size: 's' | 'm' = 'm',
   ): TemplateResult => html`
     <sbb-stepper
       selected-index="0"
       ?linear=${linear}
       orientation=${orientation || nothing}
       horizontal-from=${horizontalFrom || nothing}
+      size=${size}
     >
       <sbb-step-label icon-name="pen-small">Step 1</sbb-step-label>
       <sbb-step>
@@ -87,6 +89,13 @@ describe(`sbb-stepper`, () => {
           await setup.withFixture(template(false, orientation, true));
         }),
       );
+
+      it(
+        `orientation=${orientation} size=s`,
+        visualDiffDefault.with(async (setup) => {
+          await setup.withFixture(template(false, orientation, false, undefined, 's'));
+        }),
+      );
     }
   });
 });