feat: add function support for formItemClass prop (#6511)

* feat: add function support for formItemClass prop

* feat: add try-catch to formItemClass function

* fix: formItemClass function ts error

---------

Co-authored-by: sqchen <chenshiqi@sshlx.com>

docs/src/components/common-ui/vben-form.md

@@ -395,7 +395,7 @@ export interface FormCommonConfig {
    * 所有表单项的栅格布局
    * @default ""
    */
-  formItemClass?: string;
+  formItemClass?: (() => string) | string;
   /**
    * 隐藏所有表单项label
    * @default false

packages/@core/ui-kit/form-ui/src/form-render/form.vue

@@ -12,7 +12,12 @@ import type {
 import { computed } from 'vue';
 
 import { Form } from '@vben-core/shadcn-ui';
-import { cn, isString, mergeWithArrayOverride } from '@vben-core/shared/utils';
+import {
+  cn,
+  isFunction,
+  isString,
+  mergeWithArrayOverride,
+} from '@vben-core/shared/utils';
 
 import { provideFormRenderProps } from './context';
 import { useExpandable } from './expandable';
@@ -110,6 +115,17 @@ const computedSchema = computed(
           ? keepIndex <= index
           : false;
 
+      // 处理函数形式的formItemClass
+      let resolvedSchemaFormItemClass = schema.formItemClass;
+      if (isFunction(schema.formItemClass)) {
+        try {
+          resolvedSchemaFormItemClass = schema.formItemClass();
+        } catch (error) {
+          console.error('Error calling formItemClass function:', error);
+          resolvedSchemaFormItemClass = '';
+        }
+      }
+
       return {
         colon,
         disabled,
@@ -133,7 +149,7 @@ const computedSchema = computed(
           'flex-shrink-0',
           { hidden },
           formItemClass,
-          schema.formItemClass,
+          resolvedSchemaFormItemClass,
         ),
         labelClass: cn(labelClass, schema.labelClass),
       };

packages/@core/ui-kit/form-ui/src/types.ts

@@ -174,10 +174,10 @@ export interface FormCommonConfig {
    */
   formFieldProps?: FormFieldOptions;
   /**
-   * 所有表单项的栅格布局
+   * 所有表单项的栅格布局，支持函数形式
    * @default ""
    */
-  formItemClass?: string;
+  formItemClass?: (() => string) | string;
   /**
    * 隐藏所有表单项label
    * @default false