From de113987f528da8cb15c8f06cb2624cf7dc82018 Mon Sep 17 00:00:00 2001
From: Max Wang <max.wang.cs@gmail.com>
Date: Mon, 10 Dec 2018 14:29:43 -0800
Subject: [PATCH] Yoga debug info (#1253)

* fix SIMULATE_WEB_RESPONSE not imported #449

* Fix to make rangeMode update in right time

* remove uncessary assert

* Fix collection cell editing bug for iOS 9 & 10

* Revert "Fix collection cell editing bug for iOS 9 & 10"

This reverts commit 06e18a10596622ff8a68835c95a23986d7bf61ea.

* Add description method for yoga.

* Fix comment
---
 Source/ASDisplayNode+Beta.h  |  6 ++++++
 Source/ASDisplayNode+Yoga.mm | 16 ++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/Source/ASDisplayNode+Beta.h b/Source/ASDisplayNode+Beta.h
index 01c08609e..7adaf5e16 100644
--- a/Source/ASDisplayNode+Beta.h
+++ b/Source/ASDisplayNode+Beta.h
@@ -210,6 +210,12 @@ AS_EXTERN void ASDisplayNodePerformBlockOnEveryYogaChild(ASDisplayNode * _Nullab
 
 @end
 
+@interface ASDisplayNode (YogaDebugging)
+
+- (NSString *)yogaTreeDescription;
+
+@end
+
 @interface ASLayoutElementStyle (Yoga)
 
 - (YGNodeRef)yogaNodeCreateIfNeeded;
diff --git a/Source/ASDisplayNode+Yoga.mm b/Source/ASDisplayNode+Yoga.mm
index 8bea5d551..6dc1e8a8e 100644
--- a/Source/ASDisplayNode+Yoga.mm
+++ b/Source/ASDisplayNode+Yoga.mm
@@ -351,4 +351,20 @@ - (void)calculateLayoutFromYogaRoot:(ASSizeRange)rootConstrainedSize
 
 @end
 
+@implementation ASDisplayNode (YogaDebugging)
+
+- (NSString *)yogaTreeDescription {
+  return [self _yogaTreeDescription:@""];
+}
+
+- (NSString *)_yogaTreeDescription:(NSString *)indent {
+  auto subtree = [NSMutableString stringWithFormat:@"%@%@\n", indent, self.description];
+  for (ASDisplayNode *n in self.yogaChildren) {
+    [subtree appendString:[n _yogaTreeDescription:[indent stringByAppendingString:@"| "]]];
+  }
+  return subtree;
+}
+
+@end
+
 #endif /* YOGA */