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using System;
using System.Drawing;
using System.ComponentModel;
#if __UNIFIED__
using UIKit;
#else
using MonoTouch.UIKit;
#endif
#if __UNIFIED__
using RectangleF = CoreGraphics.CGRect;
using SizeF = CoreGraphics.CGSize;
using PointF = CoreGraphics.CGPoint;
#else
using nfloat=System.Single;
using nint=System.Int32;
using nuint=System.UInt32;
#endif
namespace Xamarin.Forms.Platform.iOS
{
public class EditorRenderer : ViewRenderer<Editor, UITextView>
{
UIToolbar _accessoryView;
IElementController ElementController => Element as IElementController;
public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
if (!Forms.IsiOS7OrNewer)
{
// Avoid crash iOS 6. iOS 6, I hate you. Why you no like Infinite size?
return base.GetDesiredSize(Math.Min(widthConstraint, 2000), Math.Min(heightConstraint, 2000));
}
return base.GetDesiredSize(widthConstraint, heightConstraint);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
Control.Changed -= HandleChanged;
Control.Started -= OnStarted;
Control.Ended -= OnEnded;
}
base.Dispose(disposing);
}
protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
{
base.OnElementChanged(e);
if (Control == null)
{
SetNativeControl(new UITextView(RectangleF.Empty));
if (Device.Idiom == TargetIdiom.Phone)
{
// iPhone does not have a dismiss keyboard button
var keyboardWidth = UIScreen.MainScreen.Bounds.Width;
_accessoryView = new UIToolbar(new RectangleF(0, 0, keyboardWidth, 44)) { BarStyle = UIBarStyle.Default, Translucent = true };
var spacer = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace);
var doneButton = new UIBarButtonItem(UIBarButtonSystemItem.Done, (o, a) =>
{
Control.ResignFirstResponder();
Element.SendCompleted();
});
_accessoryView.SetItems(new[] { spacer, doneButton }, false);
Control.InputAccessoryView = _accessoryView;
}
Control.Changed += HandleChanged;
Control.Started += OnStarted;
Control.Ended += OnEnded;
}
if (e.NewElement != null)
{
UpdateText();
UpdateFont();
UpdateTextColor();
UpdateKeyboard();
UpdateEditable();
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Editor.TextProperty.PropertyName)
UpdateText();
else if (e.PropertyName == Xamarin.Forms.InputView.KeyboardProperty.PropertyName)
UpdateKeyboard();
else if (e.PropertyName == VisualElement.IsEnabledProperty.PropertyName)
UpdateEditable();
else if (e.PropertyName == Editor.TextColorProperty.PropertyName)
UpdateTextColor();
else if (e.PropertyName == Editor.FontAttributesProperty.PropertyName)
UpdateFont();
else if (e.PropertyName == Editor.FontFamilyProperty.PropertyName)
UpdateFont();
else if (e.PropertyName == Editor.FontSizeProperty.PropertyName)
UpdateFont();
}
void HandleChanged(object sender, EventArgs e)
{
ElementController.SetValueFromRenderer(Editor.TextProperty, Control.Text);
}
void OnEnded(object sender, EventArgs eventArgs)
{
Element.SetValue(VisualElement.IsFocusedPropertyKey, false);
Element.SendCompleted();
}
void OnStarted(object sender, EventArgs eventArgs)
{
ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
}
void UpdateEditable()
{
Control.Editable = Element.IsEnabled;
Control.UserInteractionEnabled = Element.IsEnabled;
if (Control.InputAccessoryView != null)
Control.InputAccessoryView.Hidden = !Element.IsEnabled;
}
void UpdateFont()
{
Control.Font = Element.ToUIFont();
}
void UpdateKeyboard()
{
Control.ApplyKeyboard(Element.Keyboard);
}
void UpdateText()
{
// ReSharper disable once RedundantCheckBeforeAssignment
if (Control.Text != Element.Text)
Control.Text = Element.Text;
}
void UpdateTextColor()
{
var textColor = Element.TextColor;
if (textColor.IsDefault)
Control.TextColor = UIColor.Black;
else
Control.TextColor = textColor.ToUIColor();
}
}
}
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