From e311fbb79754fffc68ae1e2289672fca8bd63f0a Mon Sep 17 00:00:00 2001
From: Valentin Shergin <shergin@fb.com>
Date: Fri, 15 Jun 2018 11:25:13 -0700
Subject: [PATCH] Fabric: CornerInsets: Graphical primitive for
 rect-corner-specific values

Summary: CornerInsets is something like EdgeInsets but about corners instead of edges.

Reviewed By: fkgozali

Differential Revision: D8344062

fbshipit-source-id: 9bf7a8696fba96e3124cb15e8e84093c1f4f8747
---
 ReactCommon/fabric/graphics/Geometry.h    | 20 +++++++++++++++
 ReactCommon/fabric/graphics/conversions.h | 30 +++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/ReactCommon/fabric/graphics/Geometry.h b/ReactCommon/fabric/graphics/Geometry.h
index 9c198c4be..e44dba31e 100644
--- a/ReactCommon/fabric/graphics/Geometry.h
+++ b/ReactCommon/fabric/graphics/Geometry.h
@@ -125,5 +125,25 @@ struct EdgeInsets {
   }
 };
 
+/*
+ * CornerInsets
+ */
+struct CornerInsets {
+  Float topLeft {0};
+  Float topRight {0};
+  Float bottomLeft {0};
+  Float bottomRight {0};
+
+  bool operator ==(const CornerInsets& rhs) const {
+    return
+    std::tie(this->topLeft, this->topRight, this->bottomLeft, this->bottomRight) ==
+    std::tie(rhs.topLeft, rhs.topRight, rhs.bottomLeft, rhs.bottomRight);
+  }
+
+  bool operator !=(const CornerInsets& rhs) const {
+    return !(*this == rhs);
+  }
+};
+
 } // namespace react
 } // namespace facebook
diff --git a/ReactCommon/fabric/graphics/conversions.h b/ReactCommon/fabric/graphics/conversions.h
index 061725c01..7c79d0b38 100644
--- a/ReactCommon/fabric/graphics/conversions.h
+++ b/ReactCommon/fabric/graphics/conversions.h
@@ -105,6 +105,28 @@ inline void fromDynamic(const folly::dynamic &value, EdgeInsets &result) {
   abort();
 }
 
+inline void fromDynamic(const folly::dynamic &value, CornerInsets &result) {
+  if (value.isObject()) {
+    result = CornerInsets {
+      (Float)value["topLeft"].asDouble(),
+      (Float)value["topRight"].asDouble(),
+      (Float)value["bottomLeft"].asDouble(),
+      (Float)value["bottomRight"].asDouble()
+    };
+    return;
+  }
+  if (value.isArray()) {
+    result = CornerInsets {
+      (Float)value[0].asDouble(),
+      (Float)value[1].asDouble(),
+      (Float)value[2].asDouble(),
+      (Float)value[3].asDouble()
+    };
+    return;
+  }
+  abort();
+}
+
 inline std::string toString(const Point &point) {
   return "{" + folly::to<std::string>(point.x) + ", " + folly::to<std::string>(point.y) + "}";
 }
@@ -125,5 +147,13 @@ inline std::string toString(const EdgeInsets &edgeInsets) {
     folly::to<std::string>(edgeInsets.bottom) + "}";
 }
 
+inline std::string toString(const CornerInsets &cornerInsets) {
+  return "{" +
+    folly::to<std::string>(cornerInsets.topLeft) + ", " +
+    folly::to<std::string>(cornerInsets.topRight) + ", " +
+    folly::to<std::string>(cornerInsets.bottomLeft) + ", " +
+    folly::to<std::string>(cornerInsets.bottomRight) + "}";
+}
+
 } // namespace react
 } // namespace facebook