Nullsafe react/views/view (#46490)

Summary:
Pull Request resolved: #46490

Fix nulls to prepare this module for further Kotlin conversion

Changelog: [Internal]

Reviewed By: rshest

Differential Revision: D62641672

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewGroupDrawingOrderHelper.java

@@ -47,7 +47,7 @@ public void handleAddView(View view) {
    *
    * @param view The view that is being removed.
    */
-  public void handleRemoveView(View view) {
+  public void handleRemoveView(@Nullable View view) {
     if (ViewGroupManager.getViewZIndex(view) != null) {
       mNumberOfChildrenWithZIndex--;
     }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/ViewGroupManager.java

@@ -68,7 +68,7 @@ public static void setViewZIndex(View view, int zIndex) {
     mZIndexHash.put(view, zIndex);
   }
 
-  public static @Nullable Integer getViewZIndex(View view) {
+  public static @Nullable Integer getViewZIndex(@Nullable View view) {
     return mZIndexHash.get(view);
   }
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/modal/ReactModalHostView.kt

@@ -375,7 +375,7 @@ public class ReactModalHostView(context: ThemedReactContext) :
    * styleHeight on the LayoutShadowNode to be the window size. This is done through the
    * UIManagerModule, and will then cause the children to layout as if they can fill the window.
    */
-  public class DialogRootViewGroup internal constructor(context: Context?) :
+  public class DialogRootViewGroup internal constructor(context: Context) :
       ReactViewGroup(context), RootView {
     internal var stateWrapper: StateWrapper? = null
     internal var eventDispatcher: EventDispatcher? = null

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/ReactDrawableHelper.java

@@ -15,25 +15,29 @@
 import android.graphics.drawable.RippleDrawable;
 import android.util.TypedValue;
 import androidx.annotation.Nullable;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
 import com.facebook.react.bridge.ReadableMap;
-import com.facebook.react.bridge.SoftAssertions;
 import com.facebook.react.uimanager.PixelUtil;
 import com.facebook.react.uimanager.ViewProps;
 
 /**
  * Utility class that helps with converting android drawable description used in JS to an actual
  * instance of {@link Drawable}.
  */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class ReactDrawableHelper {
 
   private static final TypedValue sResolveOutValue = new TypedValue();
 
-  public static Drawable createDrawableFromJSDescription(
+  public static @Nullable Drawable createDrawableFromJSDescription(
       Context context, ReadableMap drawableDescriptionDict) {
     String type = drawableDescriptionDict.getString("type");
     if ("ThemeAttrAndroid".equals(type)) {
       String attr = drawableDescriptionDict.getString("attribute");
+      if (attr == null) {
+        throw new JSApplicationIllegalArgumentException("JS description missing 'attribute' field");
+      }
       int attrId = getAttrId(context, attr);
       if (!context.getTheme().resolveAttribute(attrId, sResolveOutValue, true)) {
         throw new JSApplicationIllegalArgumentException(
@@ -50,7 +54,6 @@ public static Drawable createDrawableFromJSDescription(
   }
 
   private static int getAttrId(Context context, String attr) {
-    SoftAssertions.assertNotNull(attr);
     if ("selectableItemBackground".equals(attr)) {
       return android.R.attr.selectableItemBackground;
     } else if ("selectableItemBackgroundBorderless".equals(attr)) {
@@ -60,7 +63,7 @@ private static int getAttrId(Context context, String attr) {
     }
   }
 
-  private static Drawable getDefaultThemeDrawable(Context context) {
+  private static @Nullable Drawable getDefaultThemeDrawable(Context context) {
     return context.getResources().getDrawable(sResolveOutValue.resourceId, context.getTheme());
   }
 
@@ -74,7 +77,8 @@ private static RippleDrawable getRippleDrawable(
     return new RippleDrawable(colorStateList, null, mask);
   }
 
-  private static Drawable setRadius(ReadableMap drawableDescriptionDict, Drawable drawable) {
+  private static @Nullable Drawable setRadius(
+      ReadableMap drawableDescriptionDict, @Nullable Drawable drawable) {
     if (drawableDescriptionDict.hasKey("rippleRadius") && drawable instanceof RippleDrawable) {
       RippleDrawable rippleDrawable = (RippleDrawable) drawable;
       double rippleRadius = drawableDescriptionDict.getDouble("rippleRadius");

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundDrawable.java

@@ -8,11 +8,13 @@
 package com.facebook.react.views.view;
 
 import android.content.Context;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.react.uimanager.drawable.CSSBackgroundDrawable;
 
 /**
  * @deprecated Please use {@link CSSBackgroundDrawable} instead
  */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 @Deprecated(since = "0.75.0", forRemoval = true)
 public class ReactViewBackgroundDrawable extends CSSBackgroundDrawable {
   /**

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundManager.java

@@ -7,6 +7,8 @@
 
 package com.facebook.react.views.view;
 
+import static com.facebook.infer.annotation.Assertions.nullsafeFIXME;
+
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Path;
@@ -17,10 +19,12 @@
 import android.view.View;
 import androidx.annotation.Nullable;
 import androidx.core.view.ViewCompat;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.react.common.annotations.UnstableReactNativeAPI;
 import com.facebook.react.uimanager.drawable.CSSBackgroundDrawable;
 
 /** Class that manages the background for views and borders. */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 @UnstableReactNativeAPI
 public class ReactViewBackgroundManager {
   private static enum Overflow {
@@ -40,7 +44,7 @@ public ReactViewBackgroundManager(View view) {
 
   public void cleanup() {
     ViewCompat.setBackground(mView, null);
-    mView = null;
+    mView = nullsafeFIXME(null, "Fix in Kotlin");
     mCSSBackgroundDrawable = null;
   }
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewGroup.java

@@ -7,6 +7,7 @@
 
 package com.facebook.react.views.view;
 
+import static com.facebook.infer.annotation.Assertions.nullsafeFIXME;
 import static com.facebook.react.common.ReactConstants.TAG;
 
 import android.annotation.SuppressLint;
@@ -30,6 +31,7 @@
 import androidx.annotation.Nullable;
 import com.facebook.common.logging.FLog;
 import com.facebook.infer.annotation.Assertions;
+import com.facebook.infer.annotation.Nullsafe;
 import com.facebook.react.R;
 import com.facebook.react.bridge.ReactContext;
 import com.facebook.react.bridge.ReactNoCrashSoftException;
@@ -75,6 +77,7 @@
  * Backing for a React View. Has support for borders, but since borders aren't common, lazy
  * initializes most of the storage needed for them.
  */
+@Nullsafe(Nullsafe.Mode.LOCAL)
 public class ReactViewGroup extends ViewGroup
     implements ReactInterceptingViewGroup,
         ReactClippingViewGroup,
@@ -446,7 +449,7 @@ public boolean getRemoveClippedSubviews() {
 
   @Override
   public void getClippingRect(Rect outClippingRect) {
-    outClippingRect.set(mClippingRect);
+    outClippingRect.set(nullsafeFIXME(mClippingRect, "Fix in Kotlin"));
   }
 
   @Override
@@ -587,7 +590,7 @@ private void handleAddView(View view) {
     }
   }
 
-  private void handleRemoveView(View view) {
+  private void handleRemoveView(@Nullable View view) {
     UiThreadUtil.assertOnUiThread();
 
     if (!customDrawOrderDisabled()) {
@@ -611,7 +614,7 @@ private void handleRemoveViews(int start, int count) {
   }
 
   @Override
-  public void addView(View child, int index, ViewGroup.LayoutParams params) {
+  public void addView(View child, int index, @Nullable ViewGroup.LayoutParams params) {
     // This will get called for every overload of addView so there is not need to override every
     // method.
     handleAddView(child);
@@ -626,7 +629,7 @@ protected boolean addViewInLayout(
   }
 
   @Override
-  public void removeView(View view) {
+  public void removeView(@Nullable View view) {
     handleRemoveView(view);
     super.removeView(view);
   }