js: add stretchInset in image

doric-js/lib/src/widget/image.d.ts

@@ -48,5 +48,17 @@ export declare class Image extends View {
         width: number;
         height: number;
     } | undefined) => void;
+    /**
+     * Stretch a image according to pointed rect
+     * Rect contains left, top, right & bottom
+     * For Android, it is based on nine patch
+     * For iOS, it is based on cap insets & stretch mode
+     */
+    stretchInset?: {
+        left: number;
+        top: number;
+        right: number;
+        bottom: number;
+    };
 }
 export declare function image(config: Partial<Image>): Image;

doric-js/lib/src/widget/image.js

@@ -82,6 +82,10 @@ __decorate([
     Property,
     __metadata("design:type", Function)
 ], Image.prototype, "loadCallback", void 0);
+__decorate([
+    Property,
+    __metadata("design:type", Object)
+], Image.prototype, "stretchInset", void 0);
 export function image(config) {
     const ret = new Image;
     ret.layoutConfig = layoutConfig().fit();