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@@ -5,6 +5,7 @@
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#import <React/UIView+React.h>
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#import <React/RCTUtils.h>
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#import <React/RCTConvert.h>
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+#import <React/RCTScrollView.h>
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#import <React/RCTUIManager.h>
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#import <React/RCTBridge.h>
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@@ -20,6 +21,18 @@ RCT_EXPORT_MODULE()
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return self.bridge.uiManager.methodQueue;
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}
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+- (NSDictionary *)constantsToExport
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+{
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+ return @{
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+ @"CacheDir" : [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject],
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+ @"DocumentDir": [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject],
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+ @"MainBundleDir" : [[NSBundle mainBundle] bundlePath],
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+ @"MovieDir": [NSSearchPathForDirectoriesInDomains(NSMoviesDirectory, NSUserDomainMask, YES) firstObject],
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+ @"MusicDir": [NSSearchPathForDirectoriesInDomains(NSMusicDirectory, NSUserDomainMask, YES) firstObject],
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+ @"PictureDir": [NSSearchPathForDirectoriesInDomains(NSPicturesDirectory, NSUserDomainMask, YES) firstObject],
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+ };
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+}
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+
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// forked from RN implementation
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// https://github.com/facebook/react-native/blob/f35b372883a76b5666b016131d59268b42f3c40d/React/Modules/RCTUIManager.m#L1367
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@@ -42,18 +55,61 @@ RCT_EXPORT_METHOD(takeSnapshot:(nonnull NSNumber *)target
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CGSize size = [RCTConvert CGSize:options];
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NSString *format = [RCTConvert NSString:options[@"format"] ?: @"png"];
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NSString *result = [RCTConvert NSString:options[@"result"] ?: @"file"];
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-
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+ BOOL snapshotContentContainer = [RCTConvert BOOL:options[@"snapshotContentContainer"] ?: @"false"];
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+
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// Capture image
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+ BOOL success;
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+
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+ UIView* rendered;
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+ UIScrollView* scrollView;
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+ if (snapshotContentContainer) {
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+ if (![view isKindOfClass:[RCTScrollView class]]) {
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+ reject(RCTErrorUnspecified, [NSString stringWithFormat:@"snapshotContentContainer can only be used on a RCTScrollView. instead got: %@", view], nil);
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+ return;
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+ }
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+ RCTScrollView* rctScrollView = view;
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+ scrollView = rctScrollView.scrollView;
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+ rendered = scrollView;
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+ }
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+ else {
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+ rendered = view;
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+ }
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+
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+ if (size.width < 0.1 || size.height < 0.1) {
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+ size = snapshotContentContainer ? scrollView.contentSize : view.bounds.size;
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+ }
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if (size.width < 0.1 || size.height < 0.1) {
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- size = view.bounds.size;
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+ reject(RCTErrorUnspecified, [NSString stringWithFormat:@"The content size must not be zero or negative. Got: (%g, %g)", size.width, size.height], nil);
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+ return;
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+ }
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+
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+ CGPoint savedContentOffset;
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+ CGRect savedFrame;
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+ if (snapshotContentContainer) {
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+ // Save scroll & frame and set it temporarily to the full content size
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+ savedContentOffset = scrollView.contentOffset;
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+ savedFrame = scrollView.frame;
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+ scrollView.contentOffset = CGPointZero;
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+ scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);
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}
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UIGraphicsBeginImageContextWithOptions(size, NO, 0);
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- BOOL success = [view drawViewHierarchyInRect:(CGRect){CGPointZero, size} afterScreenUpdates:YES];
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+ success = [rendered drawViewHierarchyInRect:(CGRect){CGPointZero, size} afterScreenUpdates:YES];
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UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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- if (!success || !image) {
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- reject(RCTErrorUnspecified, @"Failed to capture view snapshot", nil);
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+ if (snapshotContentContainer) {
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+ // Restore scroll & frame
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+ scrollView.contentOffset = savedContentOffset;
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+ scrollView.frame = savedFrame;
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+ }
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+
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+ if (!success) {
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+ reject(RCTErrorUnspecified, @"The view cannot be captured. drawViewHierarchyInRect was not successful. This is a potential technical or security limitation.", nil);
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+ return;
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+ }
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+
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+ if (!image) {
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+ reject(RCTErrorUnspecified, @"Failed to capture view snapshot. UIGraphicsGetImageFromCurrentImageContext() returned nil!", nil);
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return;
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}
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@@ -75,10 +131,22 @@ RCT_EXPORT_METHOD(takeSnapshot:(nonnull NSNumber *)target
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NSString *res = nil;
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if ([result isEqualToString:@"file"]) {
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// Save to a temp file
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- NSString *tempFilePath = RCTTempFilePath(format, &error);
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- if (tempFilePath) {
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- if ([data writeToFile:tempFilePath options:(NSDataWritingOptions)0 error:&error]) {
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- res = tempFilePath;
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+ NSString *path;
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+ if (options[@"path"]) {
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+ path = options[@"path"];
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+ NSString * folder = [path stringByDeletingLastPathComponent];
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+ NSFileManager * fm = [NSFileManager defaultManager];
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+ if(![fm fileExistsAtPath:folder]) {
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+ [fm createDirectoryAtPath:folder withIntermediateDirectories:YES attributes:NULL error:&error];
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+ [fm createFileAtPath:path contents:nil attributes:nil];
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+ }
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+ }
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+ else {
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+ path = RCTTempFilePath(format, &error);
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+ }
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+ if (path && !error) {
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+ if ([data writeToFile:path options:(NSDataWritingOptions)0 error:&error]) {
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+ res = path;
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}
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}
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}
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@@ -95,13 +163,13 @@ RCT_EXPORT_METHOD(takeSnapshot:(nonnull NSNumber *)target
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reject(RCTErrorUnspecified, [NSString stringWithFormat:@"Unsupported result: %@. Try one of: file | base64 | data-uri", result], nil);
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return;
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}
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- if (res != nil) {
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+ if (res && !error) {
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resolve(res);
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return;
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}
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// If we reached here, something went wrong
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- if (error != nil) reject(RCTErrorUnspecified, error.localizedDescription, error);
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+ if (error) reject(RCTErrorUnspecified, error.localizedDescription, error);
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else reject(RCTErrorUnspecified, @"viewshot unknown error", nil);
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});
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}];
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Ryan Linton
7 years ago