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//

// ASViewController.m

// AsyncDisplayKit

//

// Created by Huy Nguyen on 16/09/15.

// Copyright (c) 2015 Facebook. All rights reserved.

//

#import "ASViewController.h"

#import "ASAssert.h"

#import "ASDimension.h"

#import "ASDisplayNode+FrameworkPrivate.h"

@implementation ASViewController

{

BOOL _ensureDisplayed;

}

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

ASDisplayNodeAssert(NO, @"ASViewController requires using -initWithNode:");

return [self initWithNode:[[ASDisplayNode alloc] init]];

}

- (instancetype)initWithCoder:(NSCoder *)aDecoder

{

ASDisplayNodeAssert(NO, @"ASViewController requires using -initWithNode:");

return [self initWithNode:[[ASDisplayNode alloc] init]];

}

- (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];

[_node measureWithSizeRange:[self nodeConstrainedSize]];

}

- (void)viewDidLayoutSubviews

{

if (_ensureDisplayed && self.neverShowPlaceholders) {

_ensureDisplayed = NO;

[self.node recursivelyEnsureDisplaySynchronously:YES];

}

[super viewDidLayoutSubviews];

}

- (void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:animated];

_ensureDisplayed = YES;

[_node recursivelyFetchData];

}

// MARK: - Layout Helpers

- (ASSizeRange)nodeConstrainedSize

{

CGSize viewSize = self.view.bounds.size;

return ASSizeRangeMake(viewSize, viewSize);

}

- (ASInterfaceState)interfaceState

{

return _node.interfaceState;

}

@end