static auto boundsAnimationFromPreviousScopeRoot()

in ComponentKit/Core/CKBuildComponent.mm [29:63]

• 34 lines of code
• 5 McCabe index (conditional complexity)

  static auto boundsAnimationFromPreviousScopeRoot(CKComponentScopeRoot *newRoot,
                                                   CKComponentScopeRoot *previousRoot) -> CKComponentBoundsAnimation
  {
    NSMapTable *const uniqueIdentifierToOldComponent = [NSMapTable strongToStrongObjectsMapTable];
    [previousRoot
     enumerateComponentsMatchingPredicate:&CKComponentBoundsAnimationPredicate
     block:^(id<CKComponentProtocol> component) {
       CKComponent *oldComponent = (CKComponent *)component;
       id uniqueIdentifier = [oldComponent uniqueIdentifier];
       if (uniqueIdentifier) {
         [uniqueIdentifierToOldComponent setObject:oldComponent forKey:uniqueIdentifier];
       }
     }];

    __block CKComponentBoundsAnimation boundsAnimation {};
    [newRoot
     enumerateComponentsMatchingPredicate:&CKComponentBoundsAnimationPredicate
     block:^(id<CKComponentProtocol> component) {
       CKComponent *newComponent = (CKComponent *)component;
       id uniqueIdentifier = [newComponent uniqueIdentifier];
       if (uniqueIdentifier) {
         CKComponent *oldComponent = [uniqueIdentifierToOldComponent objectForKey:uniqueIdentifier];
         if (oldComponent) {
           auto const ba = [newComponent boundsAnimationFromPreviousComponent:oldComponent];
           if (ba.duration != 0) {
             boundsAnimation = ba;
#if CK_ASSERTIONS_ENABLED
             boundsAnimation.component = newComponent;
#endif
           }
         }
       }
     }];
    return boundsAnimation;
  }