refactor: split the genStyleUtils and make the getComponentToken …

…`getCompVarPrefix` `getDefaultComponentToken` independent

src/util/getCompVarPrefix.ts

@@ -0,0 +1,9 @@
+const getCompVarPrefix = (component: string, prefix?: string) =>
+  `${[
+    prefix,
+    component.replace(/([A-Z]+)([A-Z][a-z]+)/g, '$1-$2').replace(/([a-z])([A-Z])/g, '$1-$2'),
+  ]
+    .filter(Boolean)
+    .join('-')}`;
+
+export default getCompVarPrefix;

src/util/getComponentToken.ts

@@ -0,0 +1,42 @@
+import { GlobalToken } from '../interface';
+import { warning } from 'rc-util';
+import type { OverrideComponent, ComponentTokenKey, ComponentToken } from './genStyleUtils';
+
+export default function getComponentToken<CompTokenMap, C extends OverrideComponent<CompTokenMap>>(
+  component: C,
+  token: GlobalToken<CompTokenMap>,
+  defaultToken: CompTokenMap[C],
+  options?: {
+    deprecatedTokens?: [ComponentTokenKey<CompTokenMap, C>, ComponentTokenKey<CompTokenMap, C>][];
+  },
+) {
+  const customToken = { ...(token[component] as ComponentToken<CompTokenMap, C>) };
+  if (options?.deprecatedTokens) {
+    const { deprecatedTokens } = options;
+    deprecatedTokens.forEach(([oldTokenKey, newTokenKey]) => {
+      if (process.env.NODE_ENV !== 'production') {
+        warning(
+          !customToken?.[oldTokenKey],
+          `Component Token \`${String(
+            oldTokenKey,
+          )}\` of ${String(component)} is deprecated. Please use \`${String(newTokenKey)}\` instead.`,
+        );
+      }
+
+      // Should wrap with `if` clause, or there will be `undefined` in object.
+      if (customToken?.[oldTokenKey] || customToken?.[newTokenKey]) {
+        customToken[newTokenKey] ??= customToken?.[oldTokenKey];
+      }
+    });
+  }
+  const mergedToken: any = { ...defaultToken, ...customToken };
+
+  // Remove same value as global token to minimize size
+  Object.keys(mergedToken).forEach((key) => {
+    if (mergedToken[key] === token[key as keyof GlobalToken<CompTokenMap>]) {
+      delete mergedToken[key];
+    }
+  });
+
+  return mergedToken;
+};

src/util/getDefaultComponentToken.ts

@@ -0,0 +1,14 @@
+import { merge as mergeToken } from './statistic';
+import type { GlobalToken } from '../interface';
+import type { OverrideComponent, GetDefaultToken } from './genStyleUtils';
+
+export default function getDefaultComponentToken<CompTokenMap, C extends OverrideComponent<CompTokenMap>>(
+  component: C,
+  token: GlobalToken<CompTokenMap>,
+  getDefaultToken: GetDefaultToken<CompTokenMap, C>,
+) {
+  if (typeof getDefaultToken === 'function') {
+    return (getDefaultToken as Function)(mergeToken(token, token[component] ?? {}));
+  }
+  return getDefaultToken ?? {};
+};