Added CropException class (#344)

* added cropException

* added bitmap exceptions

Co-authored-by: Remigiusz Pawłowski <[email protected]>

Author: rempawl

CHANGELOG.md

@@ -10,6 +10,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - `Security` in case of vulnerabilities.
 
 ## [x.x.x] - unreleased
+### Changed
+- CropException sealed class with cancellation and Image exceptions  [#332](https://github.com/CanHub/Android-Image-Cropper/issues/332)
 ### Fixed
 - Fix disable closing AlertDialog when touching outside the dialog [#334](https://github.com/CanHub/Android-Image-Cropper/issues/334)
 ## [4.2.0] - 21/03/2022

cropper/src/main/java/com/canhub/cropper/BitmapUtils.kt

@@ -132,9 +132,7 @@ internal object BitmapUtils {
             val bitmap = decodeImage(resolver, uri, options)
             BitmapSampled(bitmap, options.inSampleSize)
         } catch (e: Exception) {
-            throw RuntimeException(
-                "Failed to load sampled bitmap: $uri\r\n${e.message}", e
-            )
+            throw CropException.FailedToLoadBitmap(uri, e.message)
         }
     }
 
@@ -658,9 +656,7 @@ internal object BitmapUtils {
             result?.recycle()
             throw e
         } catch (e: Exception) {
-            throw RuntimeException(
-                "Failed to load sampled bitmap: $loadedImageUri\r\n${e.message}", e
-            )
+            throw CropException.FailedToLoadBitmap(loadedImageUri, e.message)
         }
         return BitmapSampled(result, sampleSize)
     }
@@ -704,7 +700,7 @@ internal object BitmapUtils {
                 closeSafe(stream)
             }
         } while (options.inSampleSize <= 512)
-        throw RuntimeException("Failed to decode image: $uri")
+        throw CropException.FailedToDecodeImage(uri)
     }
 
     /**
@@ -745,10 +741,7 @@ internal object BitmapUtils {
             closeSafe(stream)
             decoder?.recycle()
         } catch (e: Exception) {
-            throw RuntimeException(
-                "Failed to load sampled bitmap: $uri\r\n${e.message}",
-                e
-            )
+            throw CropException.FailedToLoadBitmap(uri, e.message)
         }
         return BitmapSampled(null, 1)
     }

cropper/src/main/java/com/canhub/cropper/CropException.kt

@@ -0,0 +1,17 @@
+package com.canhub.cropper
+
+import android.net.Uri
+
+sealed class CropException(message: String) : Exception(message) {
+    class Cancellation : CropException("$EXCEPTION_PREFIX cropping has been cancelled by the user")
+    class FailedToLoadBitmap(uri: Uri, message: String?) :
+        CropException("$EXCEPTION_PREFIX Failed to load sampled bitmap: $uri\r\n$message")
+
+    class FailedToDecodeImage(uri: Uri) :
+        CropException("$EXCEPTION_PREFIX Failed to decode image: $uri")
+
+    companion object {
+
+        const val EXCEPTION_PREFIX = "crop:"
+    }
+}

cropper/src/main/java/com/canhub/cropper/CropImage.kt

@@ -254,7 +254,7 @@ object CropImage {
         originalUri = null,
         bitmap = null,
         uriContent = null,
-        error = Exception("cropping has been cancelled by the user"),
+        error = CropException.Cancellation(),
         cropPoints = floatArrayOf(),
         cropRect = null,
         wholeImageRect = null,