react-native/React/Views/RCTScrollViewManager.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTScrollViewManager.h"
#import "RCTBridge.h"
#import "RCTScrollView.h"
#import "RCTSparseArray.h"
#import "RCTUIManager.h"
@interface RCTScrollView (Private)
- (NSArray<NSDictionary *> *)calculateChildFramesData;
@end
@implementation RCTConvert (UIScrollView)
RCT_ENUM_CONVERTER(UIScrollViewKeyboardDismissMode, (@{
@"none": @(UIScrollViewKeyboardDismissModeNone),
@"on-drag": @(UIScrollViewKeyboardDismissModeOnDrag),
@"interactive": @(UIScrollViewKeyboardDismissModeInteractive),
// Backwards compatibility
@"onDrag": @(UIScrollViewKeyboardDismissModeOnDrag),
}), UIScrollViewKeyboardDismissModeNone, integerValue)
@end
@implementation RCTScrollViewManager
RCT_EXPORT_MODULE()
- (UIView *)view
{
return [[RCTScrollView alloc] initWithEventDispatcher:self.bridge.eventDispatcher];
}
RCT_EXPORT_VIEW_PROPERTY(alwaysBounceHorizontal, BOOL)
RCT_EXPORT_VIEW_PROPERTY(alwaysBounceVertical, BOOL)
RCT_EXPORT_VIEW_PROPERTY(bounces, BOOL)
RCT_EXPORT_VIEW_PROPERTY(bouncesZoom, BOOL)
RCT_EXPORT_VIEW_PROPERTY(canCancelContentTouches, BOOL)
RCT_EXPORT_VIEW_PROPERTY(centerContent, BOOL)
RCT_EXPORT_VIEW_PROPERTY(automaticallyAdjustContentInsets, BOOL)
RCT_EXPORT_VIEW_PROPERTY(decelerationRate, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(directionalLockEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(keyboardDismissMode, UIScrollViewKeyboardDismissMode)
RCT_EXPORT_VIEW_PROPERTY(maximumZoomScale, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(minimumZoomScale, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(pagingEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(scrollEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(scrollsToTop, BOOL)
RCT_EXPORT_VIEW_PROPERTY(showsHorizontalScrollIndicator, BOOL)
RCT_EXPORT_VIEW_PROPERTY(showsVerticalScrollIndicator, BOOL)
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RCT_EXPORT_VIEW_PROPERTY(stickyHeaderIndices, NSIndexSet)
RCT_EXPORT_VIEW_PROPERTY(scrollEventThrottle, NSTimeInterval)
RCT_EXPORT_VIEW_PROPERTY(zoomScale, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(contentInset, UIEdgeInsets)
RCT_EXPORT_VIEW_PROPERTY(scrollIndicatorInsets, UIEdgeInsets)
RCT_EXPORT_VIEW_PROPERTY(snapToInterval, int)
RCT_EXPORT_VIEW_PROPERTY(snapToAlignment, NSString)
RCT_REMAP_VIEW_PROPERTY(contentOffset, scrollView.contentOffset, CGPoint)
- (NSDictionary *)constantsToExport
{
return @{
// TODO: unused - remove these?
@"DecelerationRate": @{
@"normal": @(UIScrollViewDecelerationRateNormal),
@"fast": @(UIScrollViewDecelerationRateFast),
},
};
}
RCT_EXPORT_METHOD(getContentSize:(nonnull NSNumber *)reactTag
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callback:(RCTResponseSenderBlock)callback)
{
[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, RCTSparseArray *viewRegistry) {
RCTScrollView *view = viewRegistry[reactTag];
if (!view || ![view isKindOfClass:[RCTScrollView class]]) {
RCTLogError(@"Cannot find RCTScrollView with tag #%@", reactTag);
return;
}
CGSize size = view.scrollView.contentSize;
callback(@[@{
@"width" : @(size.width),
@"height" : @(size.height)
}]);
}];
}
RCT_EXPORT_METHOD(calculateChildFrames:(nonnull NSNumber *)reactTag
callback:(RCTResponseSenderBlock)callback)
{
[self.bridge.uiManager addUIBlock:^(__unused RCTUIManager *uiManager, RCTSparseArray *viewRegistry) {
RCTScrollView *view = viewRegistry[reactTag];
if (!view || ![view isKindOfClass:[RCTScrollView class]]) {
RCTLogError(@"Cannot find RCTScrollView with tag #%@", reactTag);
return;
}
NSArray<NSDictionary *> *childFrames = [view calculateChildFramesData];
if (childFrames) {
callback(@[childFrames]);
}
}];
}
- (NSArray<NSString *> *)customDirectEventTypes
{
return @[
@"scrollBeginDrag",
@"scroll",
@"scrollEndDrag",
@"scrollAnimationEnd",
@"momentumScrollBegin",
@"momentumScrollEnd",
];
}
@end