feat: added whole content diff to opseq

Cargo.toml

@@ -41,6 +41,7 @@ tracing-subscriber = { version = "0.3", optional = true }
 rmpv = { version = "1", optional = true }
 clap = { version = "4.2.1", features = ["derive"], optional = true }
 nvim-rs = { version = "0.5", features = ["use_tokio"], optional = true }
+similar = { version = "2.2", features = ["inline"] }
 
 [build-dependencies]
 tonic-build = "0.9"

src/client/nvim/codemp.lua

@@ -1,11 +1,13 @@
 local BINARY = vim.g.codemp_binary or "./codemp-client-nvim"
 
 local M = {}
+
 M.jobid   = nil
 M.create  = function(path, content) return vim.rpcrequest(M.jobid, "create", path, content) end
 M.insert  = function(path, txt, pos) return vim.rpcrequest(M.jobid, "insert", path, txt, pos) end
-M.cursor = function(path, row, col) return vim.rpcrequest(M.jobid, "cursor", path, row, col) end
 M.delete  = function(path, pos, count) return vim.rpcrequest(M.jobid, "delete", path, pos, count) end
+M.replace = function(path, txt) return vim.rpcrequest(M.jobid, "replace", path, txt) end
+M.cursor  = function(path, row, col) return vim.rpcrequest(M.jobid, "cursor", path, row, col) end
 M.attach  = function(path) return vim.rpcrequest(M.jobid, "attach", path) end
 M.listen  = function(path) return vim.rpcrequest(M.jobid, "listen", path) end
 M.detach  = function(path) return vim.rpcrequest(M.jobid, "detach", path) end
@@ -18,10 +20,14 @@ end
 local codemp_autocmds = vim.api.nvim_create_augroup("CodempAuGroup", { clear = true })
 
 local function hook_callbacks(path, buffer)
+	local prev_changedtick = vim.b.changedtick
 	vim.api.nvim_create_autocmd(
 		{ "InsertCharPre" },
 		{
-			callback = function(_) M.insert(path, vim.v.char, cursor_offset()) end,
+			callback = function(_)
+				M.insert(path, vim.v.char, cursor_offset())
+				prev_changedtick = vim.b.changedtick + 1
+			end,
 			buffer = buffer,
 			group = codemp_autocmds,
 		}
@@ -29,7 +35,12 @@ local function hook_callbacks(path, buffer)
 	vim.api.nvim_create_autocmd(
 		{ "CursorMoved", "CursorMovedI" },
 		{
-			callback = function(_)
+			callback = function(args)
+				if vim.b.changedtick ~= prev_changedtick then
+					prev_changedtick = vim.b.changedtick
+					local lines = vim.api.nvim_buf_get_lines(args.buf, 0, -1, false)
+					M.replace(path, vim.fn.join(lines, "\n"))
+				end
 				local cursor = vim.api.nvim_win_get_cursor(0)
 				M.cursor(path, cursor[1], cursor[2])
 			end,
@@ -56,9 +67,9 @@ vim.api.nvim_create_user_command('Connect',
 			return
 		end
 		local bin_args = { BINARY }
-		if #args.args > 0 then
+		if #args.fargs > 0 then
 			table.insert(bin_args, "--host")
-			table.insert(bin_args, args.args[1])
+			table.insert(bin_args, args.fargs[1])
 		end
 		if args.bang then
 			table.insert(bin_args, "--debug")

src/client/nvim/main.rs

@@ -100,6 +100,23 @@ impl Handler for NeovimHandler {
 				}
 			},
 
+			"replace" => {
+				if args.len() < 2 {
+					return Err(Value::from("not enough arguments"));
+				}
+				let path = default_empty_str(&args, 0);
+				let txt = default_empty_str(&args, 1);
+
+				let mut c = self.client.clone();
+				match c.replace(path, txt).await {
+					Ok(res) => match res {
+						true => Ok(Value::Nil),
+						false => Err(Value::from("rejected")),
+					},
+					Err(e) => Err(Value::from(format!("could not send replace: {}", e))),
+				}
+			},
+
 			"attach" => {
 				if args.len() < 1 {
 					return Err(Value::from("no path given"));

src/lib/client.rs

@@ -89,6 +89,24 @@ impl CodempClient {
 		}
 	}
 
+	pub async fn replace(&mut self, path: String, txt: String) -> Result<bool, Status> {
+		let factory = self.get_factory(&path)?;
+		match factory.replace(txt).await {
+			Err(e) => Err(Status::internal(format!("invalid operation: {}", e))),
+			Ok(op) => {
+				let req = OperationRequest {
+					path,
+					hash: "".into(),
+					user: self.id.to_string(),
+					opseq: serde_json::to_string(&op)
+						.map_err(|_| Status::invalid_argument("could not serialize opseq"))?,
+				};
+				let res = self.client.edit(req).await?.into_inner();
+				Ok(res.accepted)
+			},
+		}
+	}
+
 	pub async fn cursor(&mut self, path: String, row: i64, col: i64) -> Result<(), Status> {
 		let req = CursorMov {
 			path, user: self.id.to_string(),

src/lib/opfactory.rs

@@ -1,4 +1,5 @@
 use operational_transform::{OperationSeq, OTError};
+use similar::TextDiff;
 use tokio::sync::{mpsc, watch, oneshot};
 use tracing::error;
 
@@ -21,13 +22,25 @@ impl OperationFactory {
 		self.content == txt
 	}
 
-	pub fn replace(&mut self, txt: &str) -> OperationSeq {
-		let out = OperationSeq::default();
-		if self.content == txt {
-			return out; // nothing to do
+	pub fn replace(&mut self, txt: &str) -> Result<OperationSeq, OTError> {
+		let mut out = OperationSeq::default();
+		if self.content == txt { // TODO throw and error rather than wasting everyone's resources
+			out.retain(txt.len() as u64);
+			return Ok(out); // nothing to do
 		}
 
-		todo!()
+		let diff = TextDiff::from_chars(self.content.as_str(), txt);
+
+		for change in diff.iter_all_changes() {
+			match change.tag() {
+				similar::ChangeTag::Equal => out.retain(1),
+				similar::ChangeTag::Delete => out.delete(1),
+				similar::ChangeTag::Insert => out.insert(change.value()),
+			}
+		}
+
+		self.content = out.apply(&self.content)?;
+		Ok(out)
 	}
 
 	pub fn insert(&mut self, txt: &str, pos: u64) -> Result<OperationSeq, OTError> {
@@ -116,6 +129,12 @@ impl AsyncFactory {
 		rx.await.map_err(|_| OTError)?
 	}
 
+	pub async fn replace(&self, txt: String) -> Result<OperationSeq, OTError> {
+		let (tx, rx) = oneshot::channel();
+		self.ops.send(OpMsg::Exec(OpWrapper::Replace(txt), tx)).await.map_err(|_| OTError)?;
+		rx.await.map_err(|_| OTError)?
+	}
+
 	pub async fn process(&self, opseq: OperationSeq) -> Result<String, OTError> {
 		let (tx, rx) = oneshot::channel();
 		self.ops.send(OpMsg::Process(opseq, tx)).await.map_err(|_| OTError)?;
@@ -135,6 +154,7 @@ enum OpWrapper {
 	Insert(String, u64),
 	Delete(u64, u64),
 	Cancel(u64, u64),
+	Replace(String),
 }
 
 struct AsyncFactoryWorker {
@@ -176,6 +196,7 @@ impl AsyncFactoryWorker {
 			OpWrapper::Insert(txt, pos) => Ok(self.factory.insert(&txt, pos)?),
 			OpWrapper::Delete(pos, count) => Ok(self.factory.delete(pos, count)?),
 			OpWrapper::Cancel(pos, count) => Ok(self.factory.cancel(pos, count)?),
+			OpWrapper::Replace(txt) => Ok(self.factory.replace(&txt)?),
 		}
 	}
 }