feature: Convert a uri crop result to an object

Author: retyui

README.md

@@ -39,10 +39,21 @@ Crop the image specified by the URI param. If URI points to a remote image, it w
 If the cropping process is successful, the resultant cropped image will be stored in the cache path, and the URI returned in the promise will point to the image in the cache path. Remember to delete the cropped image from the cache path when you are done with it.
 
 ```ts
-ImageEditor.cropImage(uri, cropData).then((url) => {
-  console.log('Cropped image uri', url);
-  // In case of Web, the `url` is the base64 string
-});
+ImageEditor.cropImage(uri, cropData).then(
+  ({
+    uri, // the path to the image file (example: 'file:///data/user/0/.../image.jpg')
+    path, // the URI of the image (example: '/data/user/0/.../image.jpg')
+    name, // the name of the image file. (example: 'image.jpg')
+    width, // the width of the image in pixels
+    height, // height of the image in pixels
+    size, // the size of the image in bytes
+  }) => {
+    console.log('Cropped image uri:', uri);
+    // WEB has different response:
+    // - `uri`  is the base64 string (example `data:image/jpeg;base64,/4AAQ...AQABAA`)
+    // - `path` is the blob URL      (example `blob:https://example.com/43ff7a16...e46b1`)
+  }
+);
 ```
 
 ### `cropData: ImageCropData`

example/ios/Podfile.lock

@@ -807,7 +807,7 @@ PODS:
   - React-jsinspector (0.72.6)
   - React-logger (0.72.6):
     - glog
-  - react-native-image-editor (3.1.0):
+  - react-native-image-editor (3.2.0):
     - RCT-Folly (= 2021.07.22.00)
     - RCTRequired
     - RCTTypeSafety
@@ -1129,7 +1129,7 @@ SPEC CHECKSUMS:
   React-jsiexecutor: faca9c368233f59ed24601aca0185870466a96e9
   React-jsinspector: 194e32c6aab382d88713ad3dd0025c5f5c4ee072
   React-logger: cebf22b6cf43434e471dc561e5911b40ac01d289
-  react-native-image-editor: a58ef0223f36bd9b8aa5c2b9d45926ce51946e50
+  react-native-image-editor: ed27495b9a98482d6f4642c42b165dfe23523b8d
   React-NativeModulesApple: 63505fb94b71e2469cab35bdaf36cca813cb5bfd
   React-perflogger: e3596db7e753f51766bceadc061936ef1472edc3
   React-RCTActionSheet: 17ab132c748b4471012abbcdcf5befe860660485

example/src/SquareImageCropper.tsx

@@ -131,12 +131,12 @@ export class SquareImageCropper extends Component<Props, State> {
       if (!this._transformData) {
         return;
       }
-      const croppedImageURI = await ImageEditor.cropImage(
+      const { uri } = await ImageEditor.cropImage(
         this.state.photo.uri,
         this._transformData
       );
-      if (croppedImageURI) {
-        this.setState({ croppedImageURI });
+      if (uri) {
+        this.setState({ croppedImageURI: uri });
       }
     } catch (cropError) {
       if (cropError instanceof Error) {

src/index.ts

@@ -8,7 +8,7 @@
 import { Platform } from 'react-native';
 import NativeRNCImageEditor from './NativeRNCImageEditor';
 import type { Spec } from './NativeRNCImageEditor';
-import type { ImageCropData } from './types.ts';
+import type { ImageCropData, CropResult } from './types.ts';
 
 const LINKING_ERROR =
   `The package '@react-native-community/image-editor' doesn't seem to be linked. Make sure: \n\n` +
@@ -37,7 +37,7 @@ class ImageEditor {
    * will point to the image in the cache path. Remember to delete the
    * cropped image from the cache path when you are done with it.
    */
-  static cropImage(uri: string, cropData: ImageCropData): Promise<string> {
+  static cropImage(uri: string, cropData: ImageCropData): CropResult {
     return RNCImageEditor.cropImage(uri, cropData);
   }
 }

src/index.web.ts

@@ -1,4 +1,4 @@
-import type { ImageCropData } from './types.ts';
+import type { ImageCropData, CropResult } from './types.ts';
 
 function drawImage(
   img: HTMLImageElement,
@@ -51,16 +51,47 @@ function fetchImage(imgSrc: string): Promise<HTMLImageElement> {
 const DEFAULT_COMPRESSION_QUALITY = 0.9;
 
 class ImageEditor {
-  static cropImage(imgSrc: string, cropData: ImageCropData): Promise<string> {
+  static cropImage(imgSrc: string, cropData: ImageCropData): CropResult {
     /**
      * Returns a promise that resolves with the base64 encoded string of the cropped image
      */
     return fetchImage(imgSrc).then(function onfulfilledImgToCanvas(image) {
+      const ext = cropData.format ?? 'jpeg';
+      const type = `image/${ext}`;
+      const quality = cropData.quality ?? DEFAULT_COMPRESSION_QUALITY;
       const canvas = drawImage(image, cropData);
-      return canvas.toDataURL(
-        `image/${cropData.format ?? 'jpeg'}`,
-        cropData.quality ?? DEFAULT_COMPRESSION_QUALITY
-      );
+
+      return new Promise<Blob | null>(function onfulfilledCanvasToBlob(
+        resolve
+      ) {
+        canvas.toBlob(resolve, type, quality);
+      }).then((blob) => {
+        if (!blob) {
+          throw new Error('Image cannot be created from canvas');
+        }
+
+        let _path: string, _uri: string;
+
+        return {
+          width: canvas.width,
+          height: canvas.height,
+          name: 'ReactNative_cropped_image.' + ext,
+          size: blob.size,
+          // Lazy getters to avoid unnecessary memory usage
+          get path() {
+            if (!_path) {
+              _path = URL.createObjectURL(blob);
+            }
+            return _path;
+          },
+          get uri() {
+            if (!_uri) {
+              _uri = canvas.toDataURL(type, quality);
+            }
+            return _uri;
+          },
+        };
+      });
     });
   }
 }

src/types.ts

@@ -9,3 +9,5 @@ export interface ImageCropData
   // ^^^ codegen doesn't support union types yet
   // so to provide more type safety we override the type here
 }
+
+export type CropResult = ReturnType<Spec['cropImage']>;