Added support for front face camera. Signed-off-by: Emil Marashliev <…

…marashliev@gmail.com>

src/ios/CDVBarcodeScanner.mm

@@ -48,7 +48,7 @@ @interface CDVBarcodeScanner : CDVPlugin {}
 - (NSString*)isScanNotPossible;
 - (void)scan:(CDVInvokedUrlCommand*)command;
 - (void)encode:(CDVInvokedUrlCommand*)command;
-- (void)returnSuccess:(NSString*)scannedText format:(NSString*)format cancelled:(BOOL)cancelled callback:(NSString*)callback;
+- (void)returnSuccess:(NSString*)scannedText format:(NSString*)format cancelled:(BOOL)cancelled flipped:(BOOL)flipped callback:(NSString*)callback;
 - (void)returnError:(NSString*)message callback:(NSString*)callback;
 @end
 
@@ -66,6 +66,9 @@ @interface CDVbcsProcessor : NSObject <AVCaptureVideoDataOutputSampleBufferDeleg
 @property (nonatomic)         BOOL                        is1D;
 @property (nonatomic)         BOOL                        is2D;
 @property (nonatomic)         BOOL                        capturing;
+@property (nonatomic)         BOOL                        isFrontCamera;
+@property (nonatomic)         BOOL                        isFlipped;
+
 
 - (id)initWithPlugin:(CDVBarcodeScanner*)plugin callback:(NSString*)callback parentViewController:(UIViewController*)parentViewController alterateOverlayXib:(NSString *)alternateXib;
 - (void)scanBarcode;
@@ -146,7 +149,9 @@ - (void)scan:(CDVInvokedUrlCommand*)command {
                  parentViewController:self.viewController
                  alterateOverlayXib:overlayXib
                  ];
-
+    [processor retain];
+    [processor retain];
+    [processor retain];
     // queue [processor scanBarcode] to run on the event loop
     [processor performSelector:@selector(scanBarcode) withObject:nil afterDelay:0];
 }
@@ -157,7 +162,7 @@ - (void)encode:(CDVInvokedUrlCommand*)command {
 }
 
 //--------------------------------------------------------------------------
-- (void)returnSuccess:(NSString*)scannedText format:(NSString*)format cancelled:(BOOL)cancelled callback:(NSString*)callback {
+- (void)returnSuccess:(NSString*)scannedText format:(NSString*)format cancelled:(BOOL)cancelled flipped:(BOOL)flipped callback:(NSString*)callback{
     NSNumber* cancelledNumber = [NSNumber numberWithInt:(cancelled?1:0)];
 
     NSMutableDictionary* resultDict = [[[NSMutableDictionary alloc] init] autorelease];
@@ -171,8 +176,9 @@ - (void)returnSuccess:(NSString*)scannedText format:(NSString*)format cancelled:
                                ];
 
     NSString* js = [result toSuccessCallbackString:callback];
-
-    [self writeJavascript:js];
+    if (!flipped) {
+        [self writeJavascript:js];
+    }
 }
 
 //--------------------------------------------------------------------------
@@ -242,6 +248,9 @@ - (void)dealloc {
 
 //--------------------------------------------------------------------------
 - (void)scanBarcode {
+
+//    self.captureSession = nil;
+//    self.previewLayer = nil;
     NSString* errorMessage = [self setUpCaptureSession];
     if (errorMessage) {
         [self barcodeScanFailed:errorMessage];
@@ -281,7 +290,7 @@ - (void)barcodeScanDone {
 //--------------------------------------------------------------------------
 - (void)barcodeScanSucceeded:(NSString*)text format:(NSString*)format {
     [self barcodeScanDone];
-    [self.plugin returnSuccess:text format:format cancelled:FALSE callback:self.callback];
+    [self.plugin returnSuccess:text format:format cancelled:FALSE flipped:FALSE callback:self.callback];
 }
 
 //--------------------------------------------------------------------------
@@ -293,7 +302,19 @@ - (void)barcodeScanFailed:(NSString*)message {
 //--------------------------------------------------------------------------
 - (void)barcodeScanCancelled {
     [self barcodeScanDone];
-    [self.plugin returnSuccess:@"" format:@"" cancelled:TRUE callback:self.callback];
+    [self.plugin returnSuccess:@"" format:@"" cancelled:TRUE flipped:self.isFlipped callback:self.callback];
+    if (self.isFlipped) {
+        self.isFlipped = NO;
+    }
+}
+
+
+- (void)flipCamera
+{
+    self.isFlipped = YES;
+    self.isFrontCamera = !self.isFrontCamera;
+    [self performSelector:@selector(barcodeScanCancelled) withObject:nil afterDelay:0];
+    [self performSelector:@selector(scanBarcode) withObject:nil afterDelay:0.1];
 }
 
 //--------------------------------------------------------------------------
@@ -303,8 +324,21 @@ - (NSString*)setUpCaptureSession {
     AVCaptureSession* captureSession = [[[AVCaptureSession alloc] init] autorelease];
     self.captureSession = captureSession;
 
-    AVCaptureDevice* device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
-    if (!device) return @"unable to obtain video capture device";
+       AVCaptureDevice* __block device = nil;
+    if (self.isFrontCamera) {
+
+        NSArray* devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+        [devices enumerateObjectsUsingBlock:^(AVCaptureDevice *obj, NSUInteger idx, BOOL *stop) {
+            if (obj.position == AVCaptureDevicePositionFront) {
+                device = obj;
+            }
+        }];
+    } else {
+        device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+        if (!device) return @"unable to obtain video capture device";
+
+    }
+
 
     AVCaptureDeviceInput* input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
     if (!input) return @"unable to obtain video capture device input";
@@ -621,7 +655,7 @@ - (id)initWithProcessor:(CDVbcsProcessor*)processor alternateOverlay:(NSString *
 //--------------------------------------------------------------------------
 - (void)dealloc {
     self.view = nil;
-    self.processor = nil;
+//    self.processor = nil;
     self.shutterPressed = NO;
     self.alternateXib = nil;
     self.overlayView = nil;      
@@ -679,6 +713,11 @@ - (IBAction)cancelButtonPressed:(id)sender {
     [self.processor performSelector:@selector(barcodeScanCancelled) withObject:nil afterDelay:0];
 }
 
+- (void)flipCameraButtonPressed:(id)sender
+{
+    [self.processor performSelector:@selector(flipCamera) withObject:nil afterDelay:0];
+}
+
 //--------------------------------------------------------------------------
 - (UIView *)buildOverlayViewFromXib 
 {
@@ -717,22 +756,30 @@ - (UIView*)buildOverlayView {
                        action:@selector(cancelButtonPressed:)
                        ];
 
+
     id flexSpace = [[[UIBarButtonItem alloc] autorelease]
                     initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
                     target:nil
                     action:nil
                     ];
 
+    id flipCamera = [[[UIBarButtonItem alloc] autorelease]
+                       initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
+                       target:(id)self
+                       action:@selector(flipCameraButtonPressed:)
+                       ];
+
+
 #if USE_SHUTTER
     id shutterButton = [[UIBarButtonItem alloc]
                         initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
                         target:(id)self
                         action:@selector(shutterButtonPressed)
                         ];
 
-    toolbar.items = [NSArray arrayWithObjects:flexSpace,cancelButton,flexSpace,shutterButton,nil];
+    toolbar.items = [NSArray arrayWithObjects:flexSpace,cancelButton,flexSpace, flipCamera ,shutterButton,nil];
 #else
-    toolbar.items = [NSArray arrayWithObjects:flexSpace,cancelButton,flexSpace,nil];
+    toolbar.items = [NSArray arrayWithObjects:flexSpace,cancelButton,flexSpace, flipCamera,nil];
 #endif
     bounds = overlayView.bounds;