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using System;
using System.ComponentModel;
using AppKit;
using Foundation;
namespace Xamarin.Forms.Platform.MacOS
{
public class EditorRenderer : ViewRenderer<Editor, NSTextField>
{
const string NewLineSelector = "insertNewline";
bool _disposed;
IElementController ElementController => Element;
protected override void OnElementChanged(ElementChangedEventArgs<Editor> e)
{
base.OnElementChanged(e);
if (Control == null)
{
SetNativeControl(new NSTextField { UsesSingleLineMode = false });
Control.Cell.Scrollable = true;
Control.Cell.Wraps = true;
Control.Changed += HandleChanged;
Control.EditingBegan += OnEditingBegan;
Control.EditingEnded += OnEditingEnded;
Control.DoCommandBySelector = (control, textView, commandSelector) =>
{
var result = false;
if (commandSelector.Name.StartsWith(NewLineSelector, StringComparison.InvariantCultureIgnoreCase))
{
textView.InsertText(new NSString(Environment.NewLine));
result = true;
}
return result;
};
}
if (e.NewElement == null) return;
UpdateText();
UpdateFont();
UpdateTextColor();
UpdateEditable();
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Editor.TextProperty.PropertyName)
UpdateText();
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();
}
protected override void SetBackgroundColor(Color color)
{
if (Control == null)
return;
Control.BackgroundColor = color == Color.Default ? NSColor.Clear : color.ToNSColor();
base.SetBackgroundColor(color);
}
protected override void Dispose(bool disposing)
{
if (disposing && !_disposed)
{
_disposed = true;
if (Control != null)
{
Control.Changed -= HandleChanged;
Control.EditingBegan -= OnEditingBegan;
Control.EditingEnded -= OnEditingEnded;
}
}
base.Dispose(disposing);
}
void HandleChanged(object sender, EventArgs e)
{
ElementController.SetValueFromRenderer(Editor.TextProperty, Control.StringValue);
}
void OnEditingEnded(object sender, EventArgs eventArgs)
{
Element.SetValue(VisualElement.IsFocusedPropertyKey, false);
Element.SendCompleted();
}
void OnEditingBegan(object sender, EventArgs eventArgs)
{
ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
}
void UpdateEditable()
{
Control.Editable = Element.IsEnabled;
}
void UpdateFont()
{
Control.Font = Element.ToNSFont();
}
void UpdateText()
{
if (Control.StringValue != Element.Text)
Control.StringValue = Element.Text ?? string.Empty;
}
void UpdateTextColor()
{
var textColor = Element.TextColor;
Control.TextColor = textColor.IsDefault ? NSColor.Black : textColor.ToNSColor();
}
}
}
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