From 31170de0ed083f86a33e533e9ea49f566a9db49f Mon Sep 17 00:00:00 2001
From: "Frank A. Krueger" <fak@praeclarum.org>
Date: Thu, 16 Nov 2017 16:19:31 -0600
Subject: [PATCH] Add XF Entry

---
 Ooui.Forms/Renderers/EntryRenderer.cs | 167 ++++++++++++++++++++++++++
 Ooui/Input.cs                         |   6 +
 2 files changed, 173 insertions(+)
 create mode 100644 Ooui.Forms/Renderers/EntryRenderer.cs

diff --git a/Ooui.Forms/Renderers/EntryRenderer.cs b/Ooui.Forms/Renderers/EntryRenderer.cs
new file mode 100644
index 0000000..d48f78e
--- /dev/null
+++ b/Ooui.Forms/Renderers/EntryRenderer.cs
@@ -0,0 +1,167 @@
+using System;
+using System.ComponentModel;
+using System.Diagnostics;
+using Ooui.Forms.Extensions;
+using Xamarin.Forms;
+
+namespace Ooui.Forms.Renderers
+{
+    public class EntryRenderer : ViewRenderer<Entry, Ooui.Input>
+    {
+        Ooui.Color _defaultTextColor;
+        bool _disposed;
+
+        static Size initialSize = Size.Zero;
+
+        public EntryRenderer ()
+        {
+        }
+
+        public override SizeRequest GetDesiredSize (double widthConstraint, double heightConstraint)
+        {
+            return base.GetDesiredSize (widthConstraint, heightConstraint);
+        }
+
+        IElementController ElementController => Element as IElementController;
+
+        protected override void Dispose (bool disposing)
+        {
+            if (_disposed)
+                return;
+
+            _disposed = true;
+
+            if (disposing) {
+                if (Control != null) {
+                    //Control.Inputted -= OnEditingBegan;
+                    Control.Inputted -= OnEditingChanged;
+                    Control.Changed -= OnEditingEnded;
+                }
+            }
+
+            base.Dispose (disposing);
+        }
+
+        protected override void OnElementChanged (ElementChangedEventArgs<Entry> e)
+        {
+            base.OnElementChanged (e);
+
+            if (e.NewElement == null)
+                return;
+
+            if (Control == null) {
+                var textField = new Ooui.Input (InputType.Text);
+                SetNativeControl (textField);
+
+                _defaultTextColor = Colors.Black;
+
+                textField.Inputted += OnEditingChanged;
+
+                //textField.EditingDidBegin += OnEditingBegan;
+                textField.Changed += OnEditingEnded;
+            }
+
+            UpdatePlaceholder ();
+            UpdatePassword ();
+            UpdateText ();
+            UpdateColor ();
+            UpdateFont ();
+            UpdateKeyboard ();
+            UpdateAlignment ();
+        }
+
+        protected override void OnElementPropertyChanged (object sender, PropertyChangedEventArgs e)
+        {
+            if (e.PropertyName == Entry.PlaceholderProperty.PropertyName || e.PropertyName == Entry.PlaceholderColorProperty.PropertyName)
+                UpdatePlaceholder ();
+            else if (e.PropertyName == Entry.IsPasswordProperty.PropertyName)
+                UpdatePassword ();
+            else if (e.PropertyName == Entry.TextProperty.PropertyName)
+                UpdateText ();
+            else if (e.PropertyName == Entry.TextColorProperty.PropertyName)
+                UpdateColor ();
+            else if (e.PropertyName == Xamarin.Forms.InputView.KeyboardProperty.PropertyName)
+                UpdateKeyboard ();
+            else if (e.PropertyName == Entry.HorizontalTextAlignmentProperty.PropertyName)
+                UpdateAlignment ();
+            else if (e.PropertyName == Entry.FontAttributesProperty.PropertyName)
+                UpdateFont ();
+            else if (e.PropertyName == Entry.FontFamilyProperty.PropertyName)
+                UpdateFont ();
+            else if (e.PropertyName == Entry.FontSizeProperty.PropertyName)
+                UpdateFont ();
+            else if (e.PropertyName == VisualElement.IsEnabledProperty.PropertyName) {
+                UpdateColor ();
+                UpdatePlaceholder ();
+            }
+
+            base.OnElementPropertyChanged (sender, e);
+        }
+
+        void OnEditingBegan (object sender, EventArgs e)
+        {
+            ElementController.SetValueFromRenderer (VisualElement.IsFocusedPropertyKey, true);
+        }
+
+        void OnEditingChanged (object sender, EventArgs eventArgs)
+        {
+            ElementController.SetValueFromRenderer (Entry.TextProperty, Control.Value);
+        }
+
+        void OnEditingEnded (object sender, EventArgs e)
+        {
+            // Typing aid changes don't always raise EditingChanged event
+            if (Control.Text != Element.Text) {
+                ElementController.SetValueFromRenderer (Entry.TextProperty, Control.Text);
+            }
+
+            ElementController.SetValueFromRenderer (VisualElement.IsFocusedPropertyKey, false);
+        }
+
+        void UpdateAlignment ()
+        {
+            Control.Style.TextAlign = Element.HorizontalTextAlignment.ToOouiTextAlign ();
+        }
+
+        void UpdateColor ()
+        {
+            var textColor = Element.TextColor;
+
+            if (textColor.IsDefault || !Element.IsEnabled)
+                Control.Style.Color = _defaultTextColor;
+            else
+                Control.Style.Color = textColor.ToOouiColor ();
+        }
+
+        void UpdateFont ()
+        {
+            if (initialSize == Size.Zero) {
+                var testString = "Tj";
+                initialSize = testString.MeasureSize (Control.Style);
+            }
+
+            Element.SetStyleFont (Control.Style);
+        }
+
+        void UpdateKeyboard ()
+        {
+        }
+
+        void UpdatePassword ()
+        {
+            Control.Type = Element.IsPassword ? InputType.Password : InputType.Text;
+        }
+
+        void UpdatePlaceholder ()
+        {
+            Control.Placeholder = Element.Placeholder;
+        }
+
+        void UpdateText ()
+        {
+            // ReSharper disable once RedundantCheckBeforeAssignment
+            if (Control.Text != Element.Text)
+                Control.Text = Element.Text;
+        }
+    }
+}
diff --git a/Ooui/Input.cs b/Ooui/Input.cs
index e24abe9..9a2d2f2 100644
--- a/Ooui/Input.cs
+++ b/Ooui/Input.cs
@@ -40,6 +40,12 @@ namespace Ooui
             remove => RemoveEventListener ("input", value);
         }
 
+        string placeholder = "";
+        public string Placeholder {
+            get => placeholder;
+            set => SetProperty (ref placeholder, value, "placeholder");
+        }
+
         bool isChecked = false;
         public bool IsChecked {
             get => isChecked;