Add 'submodules/AsyncDisplayKit/' from commit '02bedc12816e251ad71777f9d2578329b6d2bef6'

git-subtree-dir: submodules/AsyncDisplayKit
git-subtree-mainline: d06f423e0e
git-subtree-split: 02bedc1281

submodules/AsyncDisplayKit/examples_extra/SynchronousKittens/Sample/BlurbNode.m

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+//
+//  BlurbNode.m
+//  Texture
+//
+//  Copyright (c) Facebook, Inc. and its affiliates.  All rights reserved.
+//  Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc.  All rights reserved.
+//  Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#import "BlurbNode.h"
+#import "AppDelegate.h"
+
+#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
+#import <AsyncDisplayKit/ASHighlightOverlayLayer.h>
+
+#import <AsyncDisplayKit/ASInsetLayoutSpec.h>
+#import <AsyncDisplayKit/ASCenterLayoutSpec.h>
+
+static CGFloat kTextPadding = 10.0f;
+static NSString *kLinkAttributeName = @"PlaceKittenNodeLinkAttributeName";
+
+@interface BlurbNode () <ASTextNodeDelegate>
+{
+  ASTextNode *_textNode;
+}
+
+@end
+
+
+@implementation BlurbNode
+
+#pragma mark -
+#pragma mark ASCellNode.
+
+- (instancetype)init
+{
+  if (!(self = [super init]))
+    return nil;
+
+  // create a text node
+  _textNode = [[ASTextNode alloc] init];
+
+  // configure the node to support tappable links
+  _textNode.delegate = self;
+  _textNode.userInteractionEnabled = YES;
+  _textNode.linkAttributeNames = @[ kLinkAttributeName ];
+
+  // generate an attributed string using the custom link attribute specified above
+  NSString *blurb = @"kittens courtesy placekitten.com \U0001F638";
+  NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:blurb];
+  [string addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue-Light" size:16.0f] range:NSMakeRange(0, blurb.length)];
+  [string addAttributes:@{
+                          kLinkAttributeName: [NSURL URLWithString:@"http://placekitten.com/"],
+                          NSForegroundColorAttributeName: [UIColor grayColor],
+                          NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle | NSUnderlinePatternDot),
+                          }
+                  range:[blurb rangeOfString:@"placekitten.com"]];
+  _textNode.attributedText = string;
+
+  // add it as a subnode, and we're done
+  [self addSubnode:_textNode];
+
+  return self;
+}
+
+- (void)didLoad
+{
+  // enable highlighting now that self.layer has loaded -- see ASHighlightOverlayLayer.h
+  self.layer.as_allowsHighlightDrawing = YES;
+
+  [super didLoad];
+}
+
+#if UseAutomaticLayout
+- (ASLayoutSpec *)layoutSpecThatFits:(ASSizeRange)constrainedSize
+{
+  ASCenterLayoutSpec *centerSpec = [[ASCenterLayoutSpec alloc] init];
+  centerSpec.centeringOptions = ASCenterLayoutSpecCenteringX;
+  centerSpec.sizingOptions = ASCenterLayoutSpecSizingOptionMinimumY;
+  centerSpec.child = _textNode;
+  
+  UIEdgeInsets padding =UIEdgeInsetsMake(kTextPadding, kTextPadding, kTextPadding, kTextPadding);
+  return [ASInsetLayoutSpec insetLayoutSpecWithInsets:padding child:centerSpec];
+}
+#else
+- (CGSize)calculateSizeThatFits:(CGSize)constrainedSize
+{
+  // called on a background thread.  custom nodes must call -measure: on their subnodes in -calculateSizeThatFits:
+  CGSize measuredSize = [_textNode measure:CGSizeMake(constrainedSize.width - 2 * kTextPadding,
+                                                      constrainedSize.height - 2 * kTextPadding)];
+  return CGSizeMake(constrainedSize.width, measuredSize.height + 2 * kTextPadding);
+}
+
+- (void)layout
+{
+  // called on the main thread.  we'll use the stashed size from above, instead of blocking on text sizing
+  CGSize textNodeSize = _textNode.calculatedSize;
+  _textNode.frame = CGRectMake(roundf((self.calculatedSize.width - textNodeSize.width) / 2.0f),
+                               kTextPadding,
+                               textNodeSize.width,
+                               textNodeSize.height);
+}
+#endif
+
+#pragma mark -
+#pragma mark ASTextNodeDelegate methods.
+
+- (BOOL)textNode:(ASTextNode *)richTextNode shouldHighlightLinkAttribute:(NSString *)attribute value:(id)value atPoint:(CGPoint)point
+{
+  // opt into link highlighting -- tap and hold the link to try it!  must enable highlighting on a layer, see -didLoad
+  return YES;
+}
+
+- (void)textNode:(ASTextNode *)richTextNode tappedLinkAttribute:(NSString *)attribute value:(NSURL *)URL atPoint:(CGPoint)point textRange:(NSRange)textRange
+{
+  // the node tapped a link, open it
+  [[UIApplication sharedApplication] openURL:URL];
+}
+
+@end