feat: Input icon support function render

Author: zombieJ

examples/custom-icon.tsx

@@ -103,7 +103,12 @@ class CustomIconComponent extends React.Component {
             value={value}
             mode="combobox"
             backfill
-            inputIcon={getSvg(arrowPath)}
+            inputIcon={({ searchValue }) => {
+              if (searchValue) {
+                return '😺';
+              }
+              return getSvg(arrowPath);
+            }}
             clearIcon={getSvg(clearPath)}
             removeIcon={getSvg(clearPath)}
             menuItemSelectedIcon={singleItemIcon}

src/TransBtn.tsx

@@ -5,7 +5,7 @@ import { RenderNode } from './interface';
 export interface TransBtnProps {
   className: string;
   customizeIcon: RenderNode;
-  customizeIconProps?: { isSelected: boolean };
+  customizeIconProps?: any;
   onMouseDown?: React.MouseEventHandler<HTMLSpanElement>;
   onClick?: React.MouseEventHandler<HTMLSpanElement>;
   children?: React.ReactNode;

src/generate.tsx

@@ -87,7 +87,7 @@ export interface SelectProps<OptionsType extends object[], ValueType> extends Re
   allowClear?: boolean;
   clearIcon?: React.ReactNode;
   showArrow?: boolean;
-  inputIcon?: React.ReactNode;
+  inputIcon?: RenderNode;
   removeIcon?: React.ReactNode;
   menuItemSelectedIcon?: RenderNode;
 
@@ -836,6 +836,7 @@ export default function generateSelector<
             [`${prefixCls}-arrow-loading`]: loading,
           })}
           customizeIcon={inputIcon}
+          customizeIconProps={{ loading, searchValue: mergedSearchValue }}
         />
       );
     }