docs: updated usage and references

src/api/controller.rs

@@ -20,20 +20,22 @@ pub(crate) trait ControllerWorker<T : Sized + Send + Sync> {
 /// this generic trait is implemented by actors managing stream procedures.
 /// events can be enqueued for dispatching without blocking ([Controller::send]), and an async blocking 
 /// api ([Controller::recv]) is provided to wait for server events. Additional sync blocking
-/// ([Controller::blocking_recv]) and callback-based ([Controller::callback]) are implemented.
+/// ([Controller::blocking_recv]) is implemented if feature `sync` is enabled.
 ///
-/// * if possible, prefer a pure [Controller::recv] consumer
-/// * a second possibility in preference is using a [Controller::callback]
-/// * if neither is feasible a [Controller::poll]/[Controller::try_recv] approach is available
+/// * if possible, prefer a pure [Controller::recv] consumer, awaiting for events
+/// * if async is not feasible a [Controller::poll]/[Controller::try_recv] approach is possible
 #[async_trait::async_trait]
 pub trait Controller<T : Sized + Send + Sync> : Sized + Send + Sync {
 	/// type of upstream values, used in [Self::send]
 	type Input;
 
-	/// enqueue a new value to be sent
+	/// enqueue a new value to be sent to all other users
+	///
+	/// success or failure of this function does not imply validity of sent operation,
+	/// because it's integrated asynchronously on the background worker
 	fn send(&self, x: Self::Input) -> Result<()>;
 
-	/// get next value from stream, blocking until one is available
+	/// get next value from other users, blocking until one is available
 	///
 	/// this is just an async trait function wrapped by `async_trait`:
 	///
@@ -47,7 +49,7 @@ pub trait Controller<T : Sized + Send + Sync> : Sized + Send + Sync {
 		Ok(self.try_recv()?.expect("no message available after polling"))
 	}
 
-	/// block until next value is added to the stream without removing any element
+	/// block until next value is available without consuming it
 	///
 	/// this is just an async trait function wrapped by `async_trait`:
 	///
@@ -55,9 +57,14 @@ pub trait Controller<T : Sized + Send + Sync> : Sized + Send + Sync {
 	async fn poll(&self) -> Result<()>;
 
 	/// attempt to receive a value without blocking, return None if nothing is available
+	///
+	/// note that this function does not circumvent race conditions, returning errors if it would
+	/// block. it's usually safe to ignore such errors and retry
 	fn try_recv(&self) -> Result<Option<T>>;
 
 	/// sync variant of [Self::recv], blocking invoking thread
+	/// this calls [Controller::recv] inside a [tokio::runtime::Runtime::block_on]
+	#[cfg(feature = "sync")]
 	fn blocking_recv(&self, rt: &tokio::runtime::Handle) -> Result<T> {
 		rt.block_on(self.recv())
 	}

src/buffer/controller.rs

@@ -25,9 +25,6 @@ use crate::api::TextChange;
 /// queues, transforming outbound delayed ops and applying remote changes 
 /// to the local buffer
 ///
-/// this controller implements [crate::api::OperationFactory], allowing to produce
-/// Operation Sequences easily
-///
 /// upon dropping this handle will stop the associated worker
 #[derive(Debug, Clone)]
 pub struct BufferController {

src/client.rs

@@ -120,11 +120,8 @@ impl Client {
 
 	/// attach to a buffer, starting a buffer controller and returning a new reference to it
 	/// 
-	/// to interact with such buffer [crate::api::Controller::send] operation sequences 
-	/// or [crate::api::Controller::recv] for text events using its [crate::buffer::Controller].
-	/// to generate operation sequences use the [crate::api::OperationFactory]
-	/// methods, which are implemented on [crate::buffer::Controller], such as
-	/// [crate::api::OperationFactory::diff].
+	/// to interact with such buffer use [crate::api::Controller::send] or 
+	/// [crate::api::Controller::recv] to exchange [crate::api::TextChange]
 	pub async fn attach(&mut self, path: &str) -> Result<Arc<BufferController>, Error> {
 		if let Some(workspace) = &mut self.workspace {
 			let mut client = self.client.buffer.clone();

src/cursor/mod.rs

@@ -26,13 +26,20 @@ impl From::<(i32, i32)> for RowCol {
 	}
 }
 
+impl RowCol {
+	/// create a RowCol and wrap into an Option, to help build protocol packets
+	pub fn wrap(row: i32, col: i32) -> Option<RowCol> {
+		Some(RowCol { row, col })
+	}
+}
+
 impl CursorPosition {
-	/// extract start position, defaulting to (0,0)
+	/// extract start position, defaulting to (0,0), to help build protocol packets
 	pub fn start(&self) -> RowCol {
 		self.start.clone().unwrap_or((0, 0).into())
 	}
 
-	/// extract end position, defaulting to (0,0)
+	/// extract end position, defaulting to (0,0), to help build protocol packets
 	pub fn end(&self) -> RowCol {
 		self.end.clone().unwrap_or((0, 0).into())
 	}

src/lib.rs

@@ -14,17 +14,14 @@
 //! Blocking and callback variants are also implemented. The [api::Controller] can also be used to send new 
 //! events to the server ([api::Controller::send]).
 //!
-//! Each operation on a buffer is represented as an [ot::OperationSeq].
-//! A visualization about how OperationSeqs work is available
-//! [here](http://operational-transformation.github.io/index.html),
-//! but to use this library it's only sufficient to know that they can only 
-//! be applied on buffers of some length and are transformable to be able to be 
-//! applied in a different order while maintaining the same result.
-//!
-//! To generate Operation Sequences use helper methods from module [api::factory] (trait [api::OperationFactory]).
+//! Each operation on a buffer is represented as an [woot::crdt::Op]. The underlying buffer is a
+//! [WOOT CRDT](https://inria.hal.science/file/index/docid/71240/filename/RR-5580.pdf),
+//! but to use this library it's only sufficient to know that all WOOT buffers that have received
+//! the same operations converge to the same state, and that operations might not get integrated
+//! immediately but instead deferred until compatible.
 //!
 //! ## features
-//! * `ot`    : include the underlying operational transform library (default enabled)
+//! * `woot`  : include the underlying CRDT library and re-exports it (default enabled)
 //! * `api`   : include traits for core interfaces under [api] (default enabled)
 //! * `proto` : include GRCP protocol definitions under [proto] (default enabled)
 //! * `client`: include the local [client] implementation (default enabled)
@@ -40,7 +37,7 @@
 //! [instance::a_sync::Instance]
 //!
 //! ```rust,no_run
-//! use codemp::api::{Controller, OperationFactory};
+//! use codemp::api::{Controller, TextChange};
 //! # use codemp::instance::a_sync::Instance;
 //!
 //! # async fn async_example() -> codemp::Result<()> {
@@ -62,12 +59,9 @@
 //! // attach to a new buffer and execute operations on it
 //! session.create("test.txt", None).await?;   // create new buffer
 //! let buffer = session.attach("test.txt").await?; // attach to it
-//! let text = buffer.content(); // any string can be used as operation factory
-//! buffer.send(text.ins("hello", 0))?; // insert some text
-//! if let Some(operation) = text.diff(4, "o world", 5) {
-//!   buffer.send(operation)?; // replace with precision, if valid
-//! }
-//! assert_eq!(buffer.content(), "hello world");
+//! let local_change = TextChange { span: 0..0, content: "hello!".into() };
+//! buffer.send(local_change)?; // insert some text
+//! let remote_change = buffer.recv().await?;
 //! #
 //! # Ok(())
 //! # }
@@ -85,16 +79,6 @@
 //! let session = Instance::default();   // instantiate sync variant
 //! session.connect("http://alemi.dev:50051")?;   // connect to server
 //!
-//! // join remote workspace and handle cursor events with a callback
-//! let cursor = session.join("some_workspace")?;   // join workspace
-//! let (stop, stop_rx) = tokio::sync::mpsc::unbounded_channel();   // create stop channel
-//! Arc::new(cursor).callback(   // register callback
-//!   session.rt(), stop_rx,   // pass instance runtime and stop channel receiver
-//!   | cursor_event | {  
-//!     println!("received cursor event: {:?}", cursor_event);
-//!   }
-//! );
-//!
 //! // attach to buffer and blockingly receive events
 //! let buffer = session.attach("test.txt")?; // attach to buffer, must already exist
 //! while let Ok(op) = buffer.blocking_recv(session.rt()) {   // must pass runtime