Why does a NSTextField's field editor inherit the text color of it's target field when it's configured otherwise? - swift

Question

My NSTextField's textColor is white and non-editable. When I click on the label, I set the NSTextField to isEditable = true. Performing a second click on the label places it into edit mode. I get a field editor etc.
Prior or editing it looks like this:
I am subclassing my NSTextField to configure that field editor like so:
override func becomeFirstResponder() -> Bool {
let value = super.becomeFirstResponder()
if value == false {
return value
}
if let fieldEditor = currentEditor() as? NSTextView {
fieldEditor.backgroundColor = NSColor.white
fieldEditor.drawsBackground = true
fieldEditor.textColor = NSColor.black
}
return value
}
You can see from the code above I am setting the textColor of the field editor to black. When I enter editing mode I get the expected behavior:
So far so good. Enter the issue: Any new keystrokes are reflected as white text:
In the sample below I have highlighted the contents of the field to show the white text:
So it would seem that even though I am setting the fieldEditor.textColor = NSColor.black and I see that black color, the field editor is inheriting the NSTextField's text color for new input?
If, in my editor configuration I do this, keep in mind this is in a NSTextField subclass:
fieldEditor.backgroundColor = NSColor.white
fieldEditor.drawsBackground = true
fieldEditor.textColor = NSColor.black
textColor = NSColor.black // <-------
Then text input while in editing mode does come though as black. I understand the field editor is a proxy to the NSTextField:
https://developer.apple.com/library/content/documentation/TextFonts/Conceptual/CocoaTextArchitecture/TextEditing/TextEditing.html#//apple_ref/doc/uid/TP40009459-CH3-SW29
So is the flow:
field editor shows
becomes first responder
has some kind of view for the first render
sends keystrokes to the underlying NSTextField
updates itself using the NSTextField settings?