Fix errors when compiling docs.

Feature flags that clash are no fun. This reworks a few things so that
docs can properly build with all feature flags at once and note their
support.

Also adds a supported table to the README for ease of discovery.

README.md

@@ -23,6 +23,11 @@ rampant for wrapped controls. This does **not** mean you can't assess, review, o
 usage - just know it's happening, and in large part it's not going away. Issues pertaining to the mere 
 existence of unsafe will be closed without comment._
 
+If you're looking to build the docs for this on your local machine, you'll want the following due to the way feature flags work
+with `cargo doc`:
+
+`RUSTDOCFLAGS="--cfg docsrs" cargo +nightly doc --all-features --open`
+
 # Hello World
 
 ```rust
@@ -62,22 +67,28 @@ ensures the application has had time to initialize and do any housekeeping neces
 scenes.
 
 ## Currently Supported
-In terms of mostly working pieces, the following currently work. This list is not exhaustive and you're encouraged to check out the documentation for more info:
+In terms of mostly working pieces, the table below showcases the level of support for varying features. This list is not exhaustive just by virtue of documentation updating being hell - so you're encouraged to check out the code-built documentation for more info:
 
-- `App` initialization and event delegation
-- `Window` construction, handling, and event delegation
-- `View` construction, basic styling, some event delegation
-- `ViewController` construction, lifecycle delegation
-- `Color`, for handling system-established color types
-- `ListView` support, including cell reuse (still needs testing)
-- `Button` support, as well as enabling them in Toolbars
-- `Label` and `TextField` support for basic text handling.
-- `Image`, `ImageView` and `SystemIcon` for image usage. Images can use a custom draw handler, and draw graphics with the [core_graphics]() crate
-- `Toolbar` construction and basic API
-- `SplitViewController` support, including some Big-Sur-only additions
-- `WebView` with a basic API for handling callbacks
-- `UserDefaults` for persisting small pieces of data per-application
-- `Autolayout` for View layout and such
+Note that while iOS has green checkmarks, some components still aren't as well defined (e.g, Views/ViewControllers are still very alpha there).
+
+Non-Apple platforms that shim or provide a form of AppKit may be able to use a good chunk of the AppKit support in this library.
+
+| Component           | Description                         | AppKit | iOS | tvOS |
+| ------------------- | ----------------------------------- | ------ | --- | ---- |
+| App                 | Initialization & events             |   ✅   | ✅  |  ❌  |
+| Window              | Construction, handling, events      |   ✅   | ✅  |  ❌  |
+| View                | Construction, styling, events       |   ✅   | ✅  |  ❌  |
+| ViewController      | Construction, lifecycle events      |   ✅   | ✅  |  ❌  |
+| Color               | System-backed colors, theming       |   ✅   | ✅  |  ❌  |
+| ListView            | Reusable list w/ cached rows        |   ✅   | ❌  |  ❌  |
+| Button              | Styling, events, toolbar support    |   ✅   | ❌  |  ❌  |
+| Label/TextField     | Text rendering & input              |   ✅   | ❌  |  ❌  |
+| Image/ImageView     | Loading, drawing, etc               |   ✅   | ❌  |  ❌  |
+| Toolbar             | Basic native toolbar                |   ✅   | ❌  |  ❌  |
+| SplitViewController | Split views (Big Sur friendly)      |   ✅   | ❌  |  ❌  |
+| WebView             | Wrapper for WKWebView               |   ✅   | ❌  |  ❌  |
+| UserDefaults        | Persisting small data               |   ✅   | ✅  |  ❌  |
+| Autolayout          | View layout for varying screens     |   ✅   | ✅  |  ❌  |
 
 ## Optional Features
 

src/image/mod.rs

@@ -16,11 +16,11 @@ mod appkit;
 #[cfg(feature = "appkit")]
 use appkit::register_image_view_class;
 
-#[cfg(feature = "uikit")]
-mod uikit;
+//#[cfg(feature = "uikit")]
+//mod uikit;
 
-#[cfg(feature = "uikit")]
-use ios::register_image_view_class;
+//#[cfg(feature = "uikit")]
+//use uikit::register_image_view_class;
 
 mod image;
 pub use image::{Image, DrawConfig, ResizeBehavior};

src/input/mod.rs

@@ -59,11 +59,11 @@ mod appkit;
 #[cfg(feature = "appkit")]
 use appkit::{register_view_class, register_view_class_with_delegate};
 
-#[cfg(feature = "uikit")]
-mod uikit;
+//#[cfg(feature = "uikit")]
+//mod uikit;
 
-#[cfg(feature = "uikit")]
-use uikit::{register_view_class, register_view_class_with_delegate};
+//#[cfg(feature = "uikit")]
+//use uikit::{register_view_class, register_view_class_with_delegate};
 
 mod traits;
 pub use traits::TextFieldDelegate;

src/lib.rs

@@ -61,7 +61,6 @@
 //!
 //! - `appkit`: Implements appkit-specific APIs (menus, toolbars, windowing, and so on).
 //! - `uikit`: Implements uikit-specific APIs (scenes, navigation controllers, and so on).
-//! - `tvos`: Implements tvOS-specific APIs. Currently not actually implemented.
 //!
 //! The rest of the features in this framework attempt to expose a common API across the three
 //! aforementioned feature platforms; if you need something else, you can often implement it
@@ -72,6 +71,8 @@
 //!
 //! The following are a list of [Cargo features][cargo-features] that can be enabled or disabled.
 //!
+//! - `autolayout`: Enables the use of AutoLayout across all widget types. This is a default
+//! feature, but is gated to enable platforms that might shim AppKit without AutoLayout support.
 //! - `cloudkit`: Links `CloudKit.framework` and provides some wrappers around CloudKit
 //! functionality. Currently not feature complete.
 //! - `color_fallbacks`: Provides fallback colors for older systems where `systemColor` types don't
@@ -83,7 +84,7 @@
 //! code-signed, and will not work without it.
 //! - `webview`: Links `WebKit.framework` and provides a `WebView` control backed by `WKWebView`.
 //! This feature will not be supported on tvOS, as the platform has no webview control.
-//! - `webview-downloading-appkit`: Enables downloading files from the `WebView` via a private
+//! - `webview-downloading-macos`: Enables downloading files from the `WebView` via a private
 //! interface. This is not an App-Store-safe feature, so be aware of that before enabling. This
 //! feature is not supported on uikit (a user would handle downloads very differently) or tvOS
 //! (there's no web browser there at all).
@@ -96,15 +97,15 @@ pub use objc;
 pub use url;
 pub use lazy_static;
 
-#[cfg(all(feature = "appkit", feature = "uikit", not(feature = "no-intrinsics")))]
-compile_error!("The \"appkit\" and \"uikit\" features cannot be enabled together. Pick one. :)");
+//#[cfg(all(feature = "appkit", feature = "uikit", not(feature = "doc_cfg")))]
+//compile_error!("The \"appkit\" and \"uikit\" features cannot be enabled together. Pick one. :)");   
 
 #[cfg(feature = "appkit")]
-#[cfg_attr(docsrs, doc(cfg(target_os = "appkit")))]
+#[cfg_attr(docsrs, doc(cfg(feature = "appkit")))]
 pub mod appkit;
 
 #[cfg(feature = "uikit")]
-#[cfg_attr(docsrs, doc(cfg(target_os = "uikit")))]
+#[cfg_attr(docsrs, doc(cfg(feature = "uikit")))]
 pub mod uikit;
 
 #[cfg(feature = "appkit")]

src/scrollview/mod.rs

@@ -61,11 +61,11 @@ mod appkit;
 #[cfg(feature = "appkit")]
 use appkit::{register_scrollview_class, register_scrollview_class_with_delegate};
 
-#[cfg(feature = "uikit")]
-mod ios;
+//#[cfg(feature = "uikit")]
+//mod ios;
 
-#[cfg(feature = "uikit")]
-use ios::{register_view_class, register_view_class_with_delegate};
+//#[cfg(feature = "uikit")]
+//use ios::{register_view_class, register_view_class_with_delegate};
 
 mod traits;
 pub use traits::ScrollViewDelegate;

src/text/label/mod.rs

@@ -59,11 +59,11 @@ mod appkit;
 #[cfg(feature = "appkit")]
 use appkit::{register_view_class, register_view_class_with_delegate};
 
-#[cfg(feature = "uikit")]
-mod uikit;
+//#[cfg(feature = "uikit")]
+//mod uikit;
 
-#[cfg(feature = "uikit")]
-use uikit::{register_view_class, register_view_class_with_delegate};
+//#[cfg(feature = "uikit")]
+//use uikit::{register_view_class, register_view_class_with_delegate};
 
 mod traits;
 pub use traits::LabelDelegate;

src/view/controller/mod.rs

@@ -7,17 +7,9 @@ use crate::layout::Layout;
 use crate::view::{VIEW_DELEGATE_PTR, View, ViewDelegate};
 use crate::utils::Controller;
 
-#[cfg(feature = "appkit")]
-mod appkit;
-
-#[cfg(feature = "appkit")]
-use appkit::register_view_controller_class;
-
-#[cfg(feature = "uikit")]
-mod uikit;
-
-#[cfg(feature = "uikit")]
-use uikit::register_view_controller_class;
+#[cfg_attr(feature = "appkit", path = "appkit.rs")]
+#[cfg_attr(feature = "uikit", path = "uikit.rs")]
+mod native_interface;
 
 /// A `ViewController` is a wrapper around `NSViewController` in AppKit, and `UIViewController` in
 /// UIKit
@@ -52,7 +44,7 @@ where
 {
     /// Creates and returns a new `ViewController` with the provided `delegate`.
     pub fn new(delegate: T) -> Self {
-        let class = register_view_controller_class::<T>(&delegate);
+        let class = native_interface::register_view_controller_class::<T>(&delegate);
         let view = View::with(delegate);
 
         let objc = unsafe {

src/view/mod.rs

@@ -56,17 +56,9 @@ use crate::layout::{LayoutAnchorX, LayoutAnchorY, LayoutAnchorDimension};
 #[cfg(feature = "appkit")]
 use crate::pasteboard::PasteboardType;
 
-#[cfg(feature = "appkit")]
-mod appkit;
-
-#[cfg(feature = "appkit")]
-use appkit::{register_view_class, register_view_class_with_delegate};
-
-#[cfg(feature = "uikit")]
-mod uikit;
-
-#[cfg(feature = "uikit")]
-use uikit::{register_view_class, register_view_class_with_delegate};
+#[cfg_attr(feature = "appkit", path = "appkit.rs")]
+#[cfg_attr(feature = "uikit", path = "uikit.rs")]
+mod native_interface;
 
 mod controller;
 pub use controller::ViewController;
@@ -211,7 +203,7 @@ impl View {
     /// Returns a default `View`, suitable for customizing and displaying.
     pub fn new() -> Self {
         View::init(unsafe {
-            msg_send![register_view_class(), new]
+            msg_send![native_interface::register_view_class(), new]
         })
     }
 }
@@ -220,7 +212,7 @@ impl<T> View<T> where T: ViewDelegate + 'static {
     /// Initializes a new View with a given `ViewDelegate`. This enables you to respond to events
     /// and customize the view as a module, similar to class-based systems.
     pub fn with(delegate: T) -> View<T> {
-        let class = register_view_class_with_delegate(&delegate);
+        let class = native_interface::register_view_class_with_delegate(&delegate);
         let mut delegate = Box::new(delegate);
         
         let view = unsafe {

src/webview/mod.rs

@@ -26,7 +26,7 @@ use crate::layer::Layer;
 use crate::utils::properties::ObjcProperty;
 
 #[cfg(feature = "autolayout")]
-use crate::layout::LayoutAnchorX, LayoutAnchorY, LayoutAnchorDimension};
+use crate::layout::{LayoutAnchorX, LayoutAnchorY, LayoutAnchorDimension};
 
 mod actions;
 pub use actions::*;