config folder collaboration

shared-lib/lib-ot/src/core/delta/builder.rs

@@ -1,4 +1,6 @@
-use crate::core::{trim, Attributes, Delta};
+use crate::core::{trim, Attributes, Delta, PlainTextAttributes};
+
+pub type PlainDeltaBuilder = DeltaBuilder<PlainTextAttributes>;
 
 pub struct DeltaBuilder<T: Attributes> {
     delta: Delta<T>,

shared-lib/lib-ot/src/core/delta/delta.rs

@@ -13,7 +13,7 @@ use std::{
     str::FromStr,
 };
 
-// TODO: optimize the memory usage with Arc_mut or Cow
+// TODO: optimize the memory usage with Arc::make_mut or Cow
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct Delta<T: Attributes> {
     pub ops: Vec<Operation<T>>,

shared-lib/lib-ot/src/core/operation/builder.rs

@@ -1,9 +1,10 @@
 use crate::{
-    core::{Attributes, Operation},
+    core::{Attributes, Operation, PlainTextAttributes},
     rich_text::RichTextAttributes,
 };
 
 pub type RichTextOpBuilder = OpBuilder<RichTextAttributes>;
+pub type PlainTextOpBuilder = OpBuilder<PlainTextAttributes>;
 
 pub struct OpBuilder<T: Attributes> {
     ty: Operation<T>,

shared-lib/lib-ot/src/core/operation/operation.rs

@@ -1,12 +1,13 @@
 use crate::{
     core::{FlowyStr, Interval, OpBuilder, OperationTransformable},
+    errors::OTError,
     rich_text::{RichTextAttribute, RichTextAttributes},
 };
 use serde::__private::Formatter;
 use std::{
     cmp::min,
     fmt,
-    fmt::Debug,
+    fmt::{Debug, Display},
     ops::{Deref, DerefMut},
 };
 
@@ -19,13 +20,6 @@ pub trait Attributes: fmt::Display + Eq + PartialEq + Default + Clone + Debug +
     fn extend_other(&mut self, other: Self);
 }
 
-pub type RichTextOperation = Operation<RichTextAttributes>;
-impl RichTextOperation {
-    pub fn contain_attribute(&self, attribute: &RichTextAttribute) -> bool {
-        self.get_attributes().contains_key(&attribute.key)
-    }
-}
-
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub enum Operation<T: Attributes> {
     Delete(usize),
@@ -328,3 +322,25 @@ where
         }
     }
 }
+
+#[derive(Debug, Clone, Eq, PartialEq, Default)]
+pub struct PlainTextAttributes();
+impl fmt::Display for PlainTextAttributes {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.write_str("PlainTextAttributes") }
+}
+
+impl Attributes for PlainTextAttributes {
+    fn is_empty(&self) -> bool { true }
+
+    fn remove_empty(&mut self) {}
+
+    fn extend_other(&mut self, _other: Self) {}
+}
+
+impl OperationTransformable for PlainTextAttributes {
+    fn compose(&self, _other: &Self) -> Result<Self, OTError> { Ok(self.clone()) }
+
+    fn transform(&self, other: &Self) -> Result<(Self, Self), OTError> { Ok((self.clone(), other.clone())) }
+
+    fn invert(&self, _other: &Self) -> Self { self.clone() }
+}

shared-lib/lib-ot/src/rich_text/attributes.rs

@@ -1,7 +1,7 @@
 #![allow(non_snake_case)]
 use crate::{
     block_attribute,
-    core::{Attributes, OperationTransformable, RichTextOperation},
+    core::{Attributes, Operation, OperationTransformable},
     errors::OTError,
     ignore_attribute,
     inline_attribute,
@@ -16,6 +16,13 @@ use std::{
 };
 use strum_macros::Display;
 
+pub type RichTextOperation = Operation<RichTextAttributes>;
+impl RichTextOperation {
+    pub fn contain_attribute(&self, attribute: &RichTextAttribute) -> bool {
+        self.get_attributes().contains_key(&attribute.key)
+    }
+}
+
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct RichTextAttributes {
     pub(crate) inner: HashMap<RichTextAttributeKey, RichTextAttributeValue>,