feat(ios): add Ti.Blob.toArrayBuffer()

creates a JS ArrayBuffer with a copy of the underlying bytes from the blob
tidev · Aug 13, 2020 · e42bbcb · e42bbcb
1 parent 38851d7
commit e42bbcb
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diff --git a/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.h b/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.h
@@ -75,6 +75,7 @@ JSExportAs(imageWithRoundedCorner,
            : (NSNumber *)optionalBorderSize);
 - (TiBlob *)imageWithTransparentBorder:(NSUInteger)size;
 - (NSString *)toString; // FIXME This doesn't seem to override the JS impl. I think we need to find a way to modify the property post-init to override it!
+- (JSValue *)toArrayBuffer;
 
 @end
 

diff --git a/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m b/iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
@@ -446,4 +446,23 @@ - (NSString *)toString
   return [super toString];
 }
 
+static void jsArrayBufferFreeDeallocator(void *data, void *ctx)
+{
+  free(data);
+}
+
+- (JSValue *)toArrayBuffer
+{
+  NSData *theData = [self data];
+  // Copy the raw bytes of the NSData we're wrapping
+  NSUInteger len = [theData length];
+  void *arrayBytes = malloc(len);
+  [theData getBytes:arrayBytes length:len];
+
+  // Now make an ArrayBuffer with the copied bytes
+  JSContext *context = JSContext.currentContext;
+  JSValueRef *exception;
+  JSObjectRef arrayBuffer = JSObjectMakeArrayBufferWithBytesNoCopy(context.JSGlobalContextRef, arrayBytes, len, jsArrayBufferFreeDeallocator, nil, exception);
+  return [JSValue valueWithJSValueRef:arrayBuffer inContext:context];
+}
 @end