Refactor types used during yoga meassure calls

Summary: This diff refactors the types used when Yoga requires to measure the size of a View in C++

Reviewed By: shergin

Differential Revision: D13124086

fbshipit-source-id: 89dfe80bb41b4fb2eaba84af630d52ef2509b1e1

ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewManager.java

@@ -213,7 +213,7 @@ public abstract class ViewManager<T extends View, C extends ReactShadowNode>
     return null;
   }
 
-  public float[] measure(
+  public long measure(
       ReactContext context,
       T view,
       ReadableNativeMap localData,
@@ -222,6 +222,6 @@ public abstract class ViewManager<T extends View, C extends ReactShadowNode>
       YogaMeasureMode widthMode,
       float height,
       YogaMeasureMode heightMode) {
-    return null;
+    return 0;
   }
 }

ReactAndroid/src/main/java/com/facebook/react/views/text/ReactTextViewManager.java

@@ -103,7 +103,7 @@ public class ReactTextViewManager
     return MapBuilder.of("topTextLayout", MapBuilder.of("registrationName", "onTextLayout"));
   }
 
-  public float[] measure(
+  public long measure(
     ReactContext context,
     ReactTextView view,
     ReadableNativeMap localData,

ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManager.java

@@ -32,6 +32,7 @@ import com.facebook.react.uimanager.ReactStylesDiffMap;
 import com.facebook.react.uimanager.ViewDefaults;
 import com.facebook.yoga.YogaConstants;
 import com.facebook.yoga.YogaMeasureMode;
+import com.facebook.yoga.YogaMeasureOutput;
 import java.awt.font.TextAttribute;
 import java.util.ArrayList;
 import java.util.List;
@@ -189,7 +190,7 @@ public class TextLayoutManager {
     return sb;
   }
 
-  public static float[] measureText(
+  public static long measureText(
     ReactContext context,
     ReactTextView view,
     ReadableNativeMap attributedString,
@@ -296,7 +297,7 @@ public class TextLayoutManager {
       height = layout.getHeight();
     }
 
-    return new float[] { PixelUtil.toSPFromPixel(width), PixelUtil.toSPFromPixel(height) };
+    return YogaMeasureOutput.make(PixelUtil.toSPFromPixel(width), PixelUtil.toSPFromPixel(height));
   }
 
   private static class SetSpanOperation {

ReactCommon/fabric/core/conversions.h

@@ -34,5 +34,19 @@ inline std::string toString(const DisplayType &displayType) {
   }
 }
 
+inline Size yogaMeassureToSize(int64_t value) {
+  static_assert(
+      sizeof(value) == 8,
+      "Expected measureResult to be 8 bytes, or two 32 bit ints");
+
+  int32_t wBits = 0xFFFFFFFF & (value >> 32);
+  int32_t hBits = 0xFFFFFFFF & value;
+
+  float *measuredWidth = reinterpret_cast<float *>(&wBits);
+  float *measuredHeight = reinterpret_cast<float *>(&hBits);
+
+  return {*measuredWidth, *measuredHeight};
+}
+
 } // namespace react
 } // namespace facebook

ReactCommon/fabric/textlayoutmanager/platform/android/TextLayoutManager.cpp

@@ -8,6 +8,7 @@
 #include "TextLayoutManager.h"
 
 #include <react/attributedstring/conversions.h>
+#include <react/core/conversions.h>
 #include <react/jni/ReadableNativeMap.h>
 
 using namespace facebook::jni;
@@ -32,7 +33,7 @@ Size TextLayoutManager::measure(
 
   auto clazz =
       jni::findClassStatic("com/facebook/fbreact/fabric/FabricUIManager");
-  static auto measure = clazz->getMethod<JArrayFloat::javaobject(
+  static auto measure = clazz->getMethod<jlong(
       jint,
       jstring,
       ReadableNativeMap::javaobject,
@@ -49,7 +50,7 @@ Size TextLayoutManager::measure(
   int maxWidth = (int)maximumSize.width;
   int maxHeight = (int)maximumSize.height;
   local_ref<JString> componentName = make_jstring("RCTText");
-  auto values = measure(
+  return yogaMeassureToSize(measure(
       fabricUIManager,
       reactTag,
       componentName.get(),
@@ -58,13 +59,7 @@ Size TextLayoutManager::measure(
       minWidth,
       maxWidth,
       minHeight,
-      maxHeight);
-
-  std::vector<float> indices;
-  indices.resize(values->size());
-  values->getRegion(0, values->size(), indices.data());
-
-  return {indices[0], indices[1]};
+      maxHeight));
 }
 
 } // namespace react