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

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

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/AppDelegate.h

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+//
+//  AppDelegate.h
+//  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 <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+@end

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/AppDelegate.m

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+//
+//  AppDelegate.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 "AppDelegate.h"
+
+#import "ViewController.h"
+
+#import <AsyncDisplayKit/ASDisplayNode.h>
+#import <AsyncDisplayKit/ASDisplayNode+Beta.h>
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
+{
+  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+  self.window.backgroundColor = [UIColor whiteColor];
+  self.window.rootViewController = [[UINavigationController alloc] init];
+  
+  [self pushNewViewControllerAnimated:NO];
+  
+  [self.window makeKeyAndVisible];
+  
+  return YES;
+}
+
+- (void)pushNewViewControllerAnimated:(BOOL)animated
+{
+  UINavigationController *navController = (UINavigationController *)self.window.rootViewController;
+  
+  UIViewController *viewController = [[ViewController alloc] init];
+  viewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Push Another Copy" style:UIBarButtonItemStylePlain target:self action:@selector(pushNewViewController)];
+  
+  [navController pushViewController:viewController animated:animated];
+}
+
+- (void)pushNewViewController
+{
+  [self pushNewViewControllerAnimated:YES];
+}
+
+@end

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>org.AsyncDisplayKit.$(PRODUCT_NAME:rfc1034identifier)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/ViewController.h

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+//
+//  ViewController.h
+//  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 <UIKit/UIKit.h>
+
+@interface ViewController : UIViewController
+
+@end

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/ViewController.m

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+//
+//  ViewController.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 "ViewController.h"
+
+#import <AsyncDisplayKit/AsyncDisplayKit.h>
+#import <AsyncDisplayKit/ASAssert.h>
+
+#define NumberOfSections 10
+#define NumberOfRowsPerSection 20
+#define NumberOfReloadIterations 50
+
+typedef enum : NSUInteger {
+  ReloadData,
+  ReloadRows,
+  ReloadSections,
+  ReloadTypeMax
+} ReloadType;
+
+@interface ViewController () <ASTableViewDataSource, ASTableViewDelegate>
+{
+  ASTableView *_tableView;
+  NSMutableArray *_sections; // Contains arrays of indexPaths representing rows
+}
+
+@end
+
+
+@implementation ViewController
+
+- (instancetype)init
+{
+  if (!(self = [super init]))
+    return nil;
+
+  _tableView = [[ASTableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
+  _tableView.asyncDataSource = self;
+  _tableView.asyncDelegate = self;
+  _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
+  
+  _sections = [NSMutableArray arrayWithCapacity:NumberOfSections];
+  for (int i = 0; i < NumberOfSections; i++) {
+    NSMutableArray *rowsArray = [NSMutableArray arrayWithCapacity:NumberOfRowsPerSection];
+    for (int j = 0; j < NumberOfRowsPerSection; j++) {
+      [rowsArray addObject:[NSIndexPath indexPathForRow:j inSection:i]];
+    }
+    [_sections addObject:rowsArray];
+  }
+
+  return self;
+}
+
+- (void)viewDidLoad
+{
+  [super viewDidLoad];
+
+  [self.view addSubview:_tableView];
+}
+
+- (void)viewWillLayoutSubviews
+{
+  _tableView.frame = self.view.bounds;
+}
+
+- (void)viewDidAppear:(BOOL)animated
+{
+  [super viewDidAppear:animated];
+  
+  [self thrashTableView];
+}
+
+- (NSIndexSet *)randomIndexSet
+{
+  u_int32_t upperBound = (u_int32_t)_sections.count - 1;
+  u_int32_t randA = arc4random_uniform(upperBound);
+  u_int32_t randB = arc4random_uniform(upperBound);
+
+  return [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(MIN(randA, randB), MAX(randA, randB) - MIN(randA, randB))];
+}
+
+- (NSArray *)randomIndexPathsExisting:(BOOL)existing
+{
+  NSMutableArray *indexPaths = [NSMutableArray array];
+  [[self randomIndexSet] enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
+    NSUInteger rowNum = [self tableView:_tableView numberOfRowsInSection:idx];
+    NSIndexPath *sectionIndex = [[NSIndexPath alloc] initWithIndex:idx];
+    for (NSUInteger i = (existing ? 0 : rowNum); i < (existing ? rowNum : rowNum * 2); i++) {
+      // Maximize evility by sporadically skipping indicies 1/3rd of the time, but only if reloading existing rows
+      if (existing && arc4random_uniform(2) == 0) {
+        continue;
+      }
+      
+      NSIndexPath *indexPath = [sectionIndex indexPathByAddingIndex:i];
+      [indexPaths addObject:indexPath];
+    }
+  }];
+  return indexPaths;
+}
+
+- (void)thrashTableView
+{
+  [_tableView reloadData];
+  
+  NSArray *indexPathsAddedAndRemoved = nil;
+
+  for (int i = 0; i < NumberOfReloadIterations; ++i) {
+    UITableViewRowAnimation rowAnimation = (arc4random_uniform(1) == 0 ? UITableViewRowAnimationMiddle : UITableViewRowAnimationNone);
+
+    BOOL animatedScroll               = (arc4random_uniform(2) == 0 ? YES : NO);
+    ReloadType reloadType             = (arc4random_uniform(ReloadTypeMax));
+    BOOL letRunloopProceed            = (arc4random_uniform(2) == 0 ? YES : NO);
+    BOOL useBeginEndUpdates           = (arc4random_uniform(3) == 0 ? YES : NO);
+    
+    // FIXME: Need to revise the logic to support mutating the data source rather than just reload thrashing.
+    // UITableView itself does not support deleting a row in the same edit transaction as reloading it, for example.
+    BOOL addIndexPaths                = NO; //(arc4random_uniform(2) == 0 ? YES : NO);
+    
+    if (useBeginEndUpdates) {
+      [_tableView beginUpdates];
+    }
+    
+    switch (reloadType) {
+      case ReloadData:
+        [_tableView reloadData];
+        break;
+        
+      case ReloadRows:
+        [_tableView reloadRowsAtIndexPaths:[self randomIndexPathsExisting:YES] withRowAnimation:rowAnimation];
+        break;
+        
+      case ReloadSections:
+        [_tableView reloadSections:[self randomIndexSet] withRowAnimation:rowAnimation];
+        break;
+        
+      default:
+        break;
+    }
+    
+    if (addIndexPaths && !indexPathsAddedAndRemoved) {
+      indexPathsAddedAndRemoved = [self randomIndexPathsExisting:NO];
+      for (NSIndexPath *indexPath in indexPathsAddedAndRemoved) {
+        [_sections[indexPath.section] addObject:indexPath];
+      }
+      [_tableView insertRowsAtIndexPaths:indexPathsAddedAndRemoved withRowAnimation:rowAnimation];
+    }
+    
+    [_tableView setContentOffset:CGPointMake(0, arc4random_uniform(_tableView.contentSize.height - _tableView.bounds.size.height)) animated:animatedScroll];
+    
+    if (letRunloopProceed) {
+      // Run other stuff on the main queue for between 2ms and 1000ms.
+      [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:(1 / (1 + arc4random_uniform(500)))]];
+      
+      if (indexPathsAddedAndRemoved) {
+        for (NSIndexPath *indexPath in indexPathsAddedAndRemoved) {
+          [_sections[indexPath.section] removeObjectIdenticalTo:indexPath];
+        }
+        [_tableView deleteRowsAtIndexPaths:indexPathsAddedAndRemoved withRowAnimation:rowAnimation];
+        indexPathsAddedAndRemoved = nil;
+      }
+    }
+    
+    if (useBeginEndUpdates) {
+      [_tableView endUpdates];
+    }
+  }
+}
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+  return _sections.count;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+  return [(NSArray *)[_sections objectAtIndex:section] count];
+}
+
+- (ASCellNode *)tableView:(ASTableView *)tableView nodeForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+  ASTextCellNode *textCellNode = [ASTextCellNode new];
+  textCellNode.text = indexPath.description;
+  
+  return textCellNode;
+}
+
+@end

submodules/AsyncDisplayKit/examples_extra/ASTableViewStressTest/Sample/main.m

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+//
+//  main.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 <UIKit/UIKit.h>
+
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+  @autoreleasepool {
+      return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+  }
+}