From cd982ca7d008622b90c558cc9aaa60dd7f46979e Mon Sep 17 00:00:00 2001
From: Ferhat <ferhat@gmail.com>
Date: Wed, 20 Nov 2019 08:56:56 -0800
Subject: [PATCH] Fix edge detection for correct dom_renderer reset
 (flutter/engine#13940)

---
 .../lib/web_ui/lib/src/engine/browser_detection.dart        | 6 ++++++
 .../lib/web_ui/lib/src/engine/semantics/text_field.dart     | 1 +
 2 files changed, 7 insertions(+)

diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/browser_detection.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/browser_detection.dart
index 9cdc61edbd4..fffcadeef6e 100644
--- a/engine/src/flutter/lib/web_ui/lib/src/engine/browser_detection.dart
+++ b/engine/src/flutter/lib/web_ui/lib/src/engine/browser_detection.dart
@@ -16,6 +16,9 @@ enum BrowserEngine {
   /// The engine that powers Firefox.
   firefox,
 
+  /// The engine that powers Edge.
+  edge,
+
   /// We were unable to detect the current browser engine.
   unknown,
 }
@@ -30,10 +33,13 @@ BrowserEngine get browserEngine => _browserEngine ??= _detectBrowserEngine();
 
 BrowserEngine _detectBrowserEngine() {
   final String vendor = html.window.navigator.vendor;
+  final String agent = html.window.navigator.userAgent;
   if (vendor == 'Google Inc.') {
     return BrowserEngine.blink;
   } else if (vendor == 'Apple Computer, Inc.') {
     return BrowserEngine.webkit;
+  } else if (agent.contains('Edge/')) {
+    return BrowserEngine.edge;
   } else if (vendor == '') {
     // An empty string means firefox:
     // https://developer.mozilla.org/en-US/docs/Web/API/Navigator/vendor
diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/semantics/text_field.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/semantics/text_field.dart
index 107d9237c82..8ce6682ed15 100644
--- a/engine/src/flutter/lib/web_ui/lib/src/engine/semantics/text_field.dart
+++ b/engine/src/flutter/lib/web_ui/lib/src/engine/semantics/text_field.dart
@@ -60,6 +60,7 @@ class TextField extends RoleManager {
 
     switch (browserEngine) {
       case BrowserEngine.blink:
+      case BrowserEngine.edge:
       case BrowserEngine.firefox:
       case BrowserEngine.unknown:
         _initializeForBlink();