From a458b9bc880192b6e83ef5a559c06d6534a816b4 Mon Sep 17 00:00:00 2001
From: Matt Portune <59324545+mportune-bw@users.noreply.github.com>
Date: Tue, 16 Jun 2020 11:09:26 -0400
Subject: [PATCH] Workaround for disabling predictive text in visible password
 fields (#983)

* Workaround for disabling predictive text in visible password fields

* Fix for non-master branch iOS builds (#984)

* Enable extra workflow steps to allow iOS builds to succeed from non-master branch

* re-enable provisioning profile setup
---
 src/Android/Renderers/CustomEntryRenderer.cs | 43 +++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/src/Android/Renderers/CustomEntryRenderer.cs b/src/Android/Renderers/CustomEntryRenderer.cs
index 046ceb7c8..bbe6e1f88 100644
--- a/src/Android/Renderers/CustomEntryRenderer.cs
+++ b/src/Android/Renderers/CustomEntryRenderer.cs
@@ -1,5 +1,9 @@
-using Android.Content;
+using System.ComponentModel;
+using Android.Content;
+using Android.Graphics;
+using Android.Text;
 using Android.Views.InputMethods;
+using Android.Widget;
 using Bit.Droid.Renderers;
 using Xamarin.Forms;
 using Xamarin.Forms.Platform.Android;
@@ -24,5 +28,42 @@ namespace Bit.Droid.Renderers
                     (ImeAction)ImeFlags.NoExtractUi;
             }
         }
+
+        // Workaround for failure to disable text prediction on non-password fields
+        // see https://github.com/xamarin/Xamarin.Forms/issues/10857
+        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged(sender, e);
+            
+            // Check if changed property is "IsPassword", otherwise ignore
+            if (e.PropertyName == Entry.IsPasswordProperty.PropertyName)
+            {
+                // Check if field type is text, otherwise ignore (numeric passwords, etc.)
+                EditText.InputType = Element.Keyboard.ToInputType();
+                if ((EditText.InputType & InputTypes.ClassText) == InputTypes.ClassText)
+                {
+                    if (Element.IsPassword)
+                    {
+                        // Element is a password field, set inputType to TextVariationPassword which disables
+                        // predictive text by default
+                        EditText.InputType = EditText.InputType | InputTypes.TextVariationPassword;
+                    }
+                    else
+                    {
+                        // Element is not a password field, set inputType to TextVariationVisiblePassword to
+                        // disable predictive text while still displaying the content.
+                        EditText.InputType = EditText.InputType | InputTypes.TextVariationVisiblePassword;
+                    }
+                    
+                    // The workaround above forces a reset of the style properties, so we need to re-apply the font.
+                    // see https://xamarin.github.io/bugzilla-archives/33/33666/bug.html
+                    var typeface = Typeface.CreateFromAsset(Context.Assets, "RobotoMono_Regular.ttf");
+                    if (Control is TextView label)
+                    {
+                        label.Typeface = typeface;
+                    }
+                }
+            }
+        }
     }
 }