From 2cd4dbcbf43023faded21c3fa15ab4a1075eb7d7 Mon Sep 17 00:00:00 2001
From: Matt Boetger <boetger@google.com>
Date: Thu, 21 Aug 2025 14:45:29 -0700
Subject: [PATCH] update viewport metrics in ios and add todos

---
 .../shell/platform/android/platform_view_android_jni_impl.cc | 1 +
 .../darwin/ios/framework/Source/FlutterViewController.mm     | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/engine/src/flutter/shell/platform/android/platform_view_android_jni_impl.cc b/engine/src/flutter/shell/platform/android/platform_view_android_jni_impl.cc
index 543373517b5..b915ad66f27 100644
--- a/engine/src/flutter/shell/platform/android/platform_view_android_jni_impl.cc
+++ b/engine/src/flutter/shell/platform/android/platform_view_android_jni_impl.cc
@@ -367,6 +367,7 @@ static void SetViewportMetrics(JNIEnv* env,
   env->GetIntArrayRegion(javaDisplayFeaturesState, 0, stateSize,
                          &displayFeaturesState[0]);
 
+  // TODO(boetger): update for https://github.com/flutter/flutter/issues/149033
   const flutter::ViewportMetrics metrics{
       static_cast<double>(devicePixelRatio),
       static_cast<double>(physicalWidth),
diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
index 1e5aa0a4489..f7fd6cd518d 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterViewController.mm
@@ -1478,6 +1478,11 @@ static flutter::PointerData::DeviceKind DeviceKindFromTouchType(UITouch* touch)
   CGFloat scale = screen.scale;
   _viewportMetrics.physical_width = self.view.bounds.size.width * scale;
   _viewportMetrics.physical_height = self.view.bounds.size.height * scale;
+  // TODO(louisehsu): update for https://github.com/flutter/flutter/issues/169147
+  _viewportMetrics.physical_min_width_constraint = _viewportMetrics.physical_width;
+  _viewportMetrics.physical_max_width_constraint = _viewportMetrics.physical_width;
+  _viewportMetrics.physical_min_height_constraint = _viewportMetrics.physical_height;
+  _viewportMetrics.physical_max_height_constraint = _viewportMetrics.physical_height;
 }
 
 // Set _viewportMetrics physical paddings.