基本完成M2 Scheme的预览。

src/page-components/scheme/M2Scheme.tsx

@@ -2,6 +2,8 @@ import { isEqual, isNil } from 'lodash-es';
 import { useState } from 'react';
 import { Tab } from '../../components/Tab';
 import { SchemeExport } from './Export';
+import { M2SchemeBuilder } from './m2-scheme/Builder';
+import { M2SchemePreview } from './m2-scheme/Preview';
 
 const tabOptions = [
   { title: 'Overview', id: 'overview' },
@@ -21,8 +23,10 @@ export function M2Scheme({ scheme }: M3SchemeProps) {
   return (
     <>
       <Tab tabs={tabOptions} activeTab={activeTab} onActive={setActiveTab} />
-      {isEqual(activeTab, 'overview') && <div>Preview</div>}
+      {isEqual(activeTab, 'overview') && <M2SchemePreview scheme={scheme} />}
-      {isEqual(activeTab, 'builder') && <div>Builder</div>}
+      {isEqual(activeTab, 'builder') && (
+        <M2SchemeBuilder scheme={scheme} onBuildComplete={() => setActiveTab('overview')} />
+      )}
       {isEqual(activeTab, 'export') && <SchemeExport scheme={scheme} />}
     </>
   );

src/page-components/scheme/m2-scheme/Preview.module.css

@@ -0,0 +1,41 @@
+@layer pages {
+  .preview_layout {
+    padding: var(--spacing-s) var(--spacing-m);
+    width: 100%;
+    display: flex;
+    flex-direction: column;
+    align-items: stretch;
+    gap: var(--spacing-m);
+  }
+  .preview_block {
+    width: inherit;
+    padding: var(--spacing-m) var(--spacing-m);
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-m);
+    font-size: var(--font-size-s);
+    line-height: 1.1em;
+    h4 {
+      font-size: var(--font-size-m);
+      font-weight: bold;
+      line-height: 1.7em;
+    }
+  }
+  .horizontal_set {
+    display: flex;
+    flex-direction: row;
+    justify-content: space-evenly;
+    align-items: stretch;
+    gap: 0;
+  }
+  .color_block {
+    padding: var(--spacing-s) var(--spacing-xs);
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-xs);
+    .wacg {
+      font-size: var(--font-size-xxs);
+    }
+  }
+}

src/page-components/scheme/m2-scheme/Preview.tsx

@@ -0,0 +1,94 @@
+import { useMemo } from 'react';
+import { useColorFunction } from '../../../ColorFunctionContext';
+import { ScrollArea } from '../../../components/ScrollArea';
+import { Baseline, ColorSet, MaterialDesign2SchemeStorage } from '../../../material-2-scheme';
+import { SchemeContent } from '../../../models';
+import styles from './Preview.module.css';
+
+type M2SchemeFunctionColorProps = {
+  title: string;
+  color: ColorSet;
+};
+
+function M2SchemeFunctionColor({ title, color }: M2SchemeFunctionColorProps) {
+  const { colorFn } = useColorFunction();
+  const rootWacgRatio = useMemo(() => {
+    try {
+      return colorFn?.wacg_relative_contrast(color.on, color.root) ?? null;
+    } catch (e) {
+      console.error('[calc root wacg]', e);
+    }
+    return null;
+  }, [colorFn, color.on, color.root]);
+  const variantWacgRatio = useMemo(() => {
+    try {
+      return colorFn?.wacg_relative_contrast(color.on, color.variant) ?? null;
+    } catch (e) {
+      console.error('[calc variant wacg]', e);
+    }
+    return null;
+  }, [colorFn, color.on, color.variant]);
+
+  return (
+    <div className={styles.horizontal_set}>
+      <div
+        className={styles.color_block}
+        style={{ backgroundColor: `#${color.root}`, color: `#${color.on}` }}>
+        <span>{title}</span>
+        <span className={styles.wacg}>WACG: {rootWacgRatio?.toFixed(2)}</span>
+      </div>
+      <div
+        className={styles.color_block}
+        style={{ backgroundColor: `#${color.variant}`, color: `#${color.on}` }}>
+        <span>{title} Variant</span>
+        <span className={styles.wacg}>WACG: {variantWacgRatio?.toFixed(2)}</span>
+      </div>
+      <div
+        className={styles.color_block}
+        style={{ backgroundColor: `#${color.on}`, color: `#${color.root}` }}>
+        On {title}
+      </div>
+    </div>
+  );
+}
+
+type PreviewBlockProps = {
+  title: string;
+  baseline: Baseline;
+};
+
+function PreviewBlock({ title, baseline }: PreviewBlockProps) {
+  return (
+    <div
+      className={styles.preview_block}
+      style={{
+        backgroundColor: `#${baseline.background.root}`,
+        color: `#${baseline.background.on}`,
+      }}>
+      <h4>{title} Scheme</h4>
+      <M2SchemeFunctionColor title="Primary" color={baseline.primary} />
+      <M2SchemeFunctionColor title="Secondary" color={baseline.secondary} />
+      <M2SchemeFunctionColor title="Error" color={baseline.error} />
+      <M2SchemeFunctionColor title="Background" color={baseline.background} />
+      <M2SchemeFunctionColor title="Surface" color={baseline.surface} />
+      {Object.entries(baseline.custom_colors).map(([name, set], index) => (
+        <M2SchemeFunctionColor key={index} title={name} color={set} />
+      ))}
+    </div>
+  );
+}
+
+type M2SchemePreviewProps = {
+  scheme: SchemeContent<MaterialDesign2SchemeStorage>;
+};
+
+export function M2SchemePreview({ scheme }: M2SchemePreviewProps) {
+  return (
+    <ScrollArea enableY>
+      <div className={styles.preview_layout}>
+        <PreviewBlock title="Light" baseline={scheme.schemeStorage.scheme?.light} />
+        <PreviewBlock title="Dark" baseline={scheme.schemeStorage.scheme?.dark} />
+      </div>
+    </ScrollArea>
+  );
+}