| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import "FWFScrollViewHostApi.h" |
| #import "FWFWebViewHostApi.h" |
| |
| @interface FWFScrollViewHostApiImpl () |
| // InstanceManager must be weak to prevent a circular reference with the object it stores. |
| @property(nonatomic, weak) FWFInstanceManager *instanceManager; |
| @end |
| |
| @implementation FWFScrollViewHostApiImpl |
| - (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager { |
| self = [self init]; |
| if (self) { |
| _instanceManager = instanceManager; |
| } |
| return self; |
| } |
| |
| - (UIScrollView *)scrollViewForIdentifier:(NSNumber *)identifier { |
| return (UIScrollView *)[self.instanceManager instanceForIdentifier:identifier.longValue]; |
| } |
| |
| - (void)createFromWebViewWithIdentifier:(nonnull NSNumber *)identifier |
| webViewIdentifier:(nonnull NSNumber *)webViewIdentifier |
| error:(FlutterError *_Nullable __autoreleasing *_Nonnull)error { |
| WKWebView *webView = |
| (WKWebView *)[self.instanceManager instanceForIdentifier:webViewIdentifier.longValue]; |
| [self.instanceManager addDartCreatedInstance:webView.scrollView |
| withIdentifier:identifier.longValue]; |
| } |
| |
| - (NSArray<NSNumber *> *) |
| contentOffsetForScrollViewWithIdentifier:(nonnull NSNumber *)identifier |
| error:(FlutterError *_Nullable *_Nonnull)error { |
| CGPoint point = [[self scrollViewForIdentifier:identifier] contentOffset]; |
| return @[ @(point.x), @(point.y) ]; |
| } |
| |
| - (void)scrollByForScrollViewWithIdentifier:(nonnull NSNumber *)identifier |
| x:(nonnull NSNumber *)x |
| y:(nonnull NSNumber *)y |
| error:(FlutterError *_Nullable *_Nonnull)error { |
| UIScrollView *scrollView = [self scrollViewForIdentifier:identifier]; |
| CGPoint contentOffset = scrollView.contentOffset; |
| [scrollView setContentOffset:CGPointMake(contentOffset.x + x.doubleValue, |
| contentOffset.y + y.doubleValue)]; |
| } |
| |
| - (void)setContentOffsetForScrollViewWithIdentifier:(nonnull NSNumber *)identifier |
| toX:(nonnull NSNumber *)x |
| y:(nonnull NSNumber *)y |
| error:(FlutterError *_Nullable *_Nonnull)error { |
| [[self scrollViewForIdentifier:identifier] |
| setContentOffset:CGPointMake(x.doubleValue, y.doubleValue)]; |
| } |
| @end |
