react-native/React/Views/RCTScrollViewManager.m

/**
 * 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 "RCTConvert.h"
#import "RCTScrollView.h"
#import "RCTSparseArray.h"
#import "RCTUIManager.h"

@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)
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_REMAP_VIEW_PROPERTY(contentOffset, scrollView.contentOffset, CGPoint)

RCT_DEPRECATED_VIEW_PROPERTY(throttleScrollCallbackMS, scrollEventThrottle)

- (NSDictionary *)constantsToExport
{
  return @{
    @"DecelerationRate": @{
      @"Normal": @(UIScrollViewDecelerationRateNormal),
      @"Fast": @(UIScrollViewDecelerationRateFast),
    },
    @"KeyboardDismissMode": @{
      @"None": @(UIScrollViewKeyboardDismissModeNone),
      @"Interactive": @(UIScrollViewKeyboardDismissModeInteractive),
      @"OnDrag": @(UIScrollViewKeyboardDismissModeOnDrag),
    },
  };
}

RCT_EXPORT_METHOD(getContentSize:(NSNumber *)reactTag
                  callback:(RCTResponseSenderBlock)callback)
{
  [self.bridge.uiManager addUIBlock:^(RCTUIManager *uiManager, RCTSparseArray *viewRegistry) {

    UIView *view = viewRegistry[reactTag];
    if (!view) {
      RCTLogError(@"Cannot find view with tag #%@", reactTag);
      return;
    }

    CGSize size = ((RCTScrollView *)view).scrollView.contentSize;
    callback(@[@{
      @"width" : @(size.width),
      @"height" : @(size.height)
    }]);
  }];
}

@end