#import "ASViewController.h"

#import "ASAssert.h"

#import "ASDimension.h"

#import "ASDisplayNode+Subclasses.h"

@implementation ASViewController

{

BOOL _ensureDisplayed;

}

- (instancetype)initWithNode:(ASDisplayNode *)node

{

if (!(self = [super initWithNibName:nil bundle:nil])) {

return nil;

}

ASDisplayNodeAssertNotNil(node, @"Node must not be nil");

ASDisplayNodeAssertTrue(!node.layerBacked);

_node = node;

return self;

}

- (void)loadView

{

ASDisplayNodeAssertTrue(!_node.layerBacked);

self.view = _node.view;

}

- (void)viewWillLayoutSubviews

{

[super viewWillLayoutSubviews];

CGSize viewSize = self.view.bounds.size;

ASSizeRange constrainedSize = ASSizeRangeMake(viewSize, viewSize);

[_node measureWithSizeRange:constrainedSize];

}

- (void)viewDidLayoutSubviews

{

if (_ensureDisplayed && self.neverShowPlaceholders) {

_ensureDisplayed = NO;

[self.node recursivelyEnsureDisplay];

}

[super viewDidLayoutSubviews];

}

- (void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:animated];

_ensureDisplayed = YES;

[_node recursivelyFetchData];

}