cleanup editor constructors

nested/src/core/context.rs

@@ -16,20 +16,22 @@ use {
 
 #[derive(Clone)]
 pub struct ReprTree {
+    type_tag: TypeTerm,
     port: Option<AnyOuterViewPort>,
     branches: HashMap<TypeTerm, Arc<RwLock<ReprTree>>>,
 }
 
 impl ReprTree {
-    pub fn new() -> Self {
+    pub fn new(type_tag: TypeTerm) -> Self {
         ReprTree {
+            type_tag,
             port: None,
             branches: HashMap::new(),
         }
     }
 
-    pub fn new_leaf(port: AnyOuterViewPort) -> Arc<RwLock<Self>> {
+    pub fn new_leaf(type_tag: TypeTerm, port: AnyOuterViewPort) -> Arc<RwLock<Self>> {
-        let mut tree = ReprTree::new();
+        let mut tree = ReprTree::new(type_tag);
         tree.insert_leaf(vec![].into_iter(), port);
         Arc::new(RwLock::new(tree))
     }
@@ -47,7 +49,7 @@ impl ReprTree {
             if let Some(next_repr) = self.branches.get(&type_term) {
                 next_repr.write().unwrap().insert_leaf(type_ladder, port);
             } else {
-                let mut next_repr = ReprTree::new();
+                let mut next_repr = ReprTree::new(type_term.clone());
                 next_repr.insert_leaf(type_ladder, port);
                 self.insert_branch(type_term, Arc::new(RwLock::new(next_repr)));
             }
@@ -55,48 +57,34 @@ impl ReprTree {
             self.port = Some(port);
         }
     }
-}
 
-//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
+    //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
 
-#[derive(Clone)]
-pub struct Object {
-    pub type_tag: TypeTerm,
-    pub repr: Arc<RwLock<ReprTree>>,
-}
-
-impl Object {
     pub fn get_port<V: View + ?Sized + 'static>(&self) -> Option<OuterViewPort<V>>
     where
         V::Msg: Clone,
     {
         Some(
-            self.repr
+            self.port
-                .read()
-                .unwrap()
-                .port
                 .clone()?
                 .downcast::<V>()
                 .ok()
-                .unwrap(),
+                .unwrap()
         )
     }
 
-    pub fn downcast(&self, dst_type: TypeTerm) -> Option<Object> {
+    pub fn downcast(&self, dst_type: &TypeTerm) -> Option<Arc<RwLock<ReprTree>>> {
-        if let Some(repr) = self.repr.read().unwrap().branches.get(&dst_type) {
+        self.branches.get(dst_type).cloned()
-            Some(Object {
-                type_tag: dst_type,
-                repr: repr.clone(),
-            })
-        } else {
-            None
-        }
     }
 
-    fn downcast_ladder(&self, repr_ladder: impl Iterator<Item = TypeTerm>) -> Option<Object> {
+    pub fn downcast_ladder(&self, mut repr_ladder: impl Iterator<Item = TypeTerm>) -> Option<Arc<RwLock<ReprTree>>> {
-        repr_ladder.fold(Some(self.clone()), |s, t| s?.downcast(t.clone()))
+        let first = repr_ladder.next()?;
+        repr_ladder.fold(
+            self.downcast(&first),
+            |s, t| s?.read().unwrap().downcast(&t))
     }
 
+/*
     pub fn add_iso_repr(
         &self,
         type_ladder: impl Iterator<Item = TypeTerm>,
@@ -198,7 +186,9 @@ impl Object {
         _morphism_constructors: &HashMap<MorphismType, Box<dyn Fn(Object) -> Object>>,
     ) {
         // todo
-    }
+        
+}
+    */
 }
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
@@ -239,14 +229,14 @@ pub struct Context {
     type_dict: TypeDict,
 
     /// objects
-    objects: HashMap<String, Object>,
+    objects: HashMap<String, Arc<RwLock<ReprTree>>>,
 
     /// editors
-    editor_ctors: HashMap<TypeID, Box<dyn Fn(&Self, TypeTerm) -> Option<Arc<RwLock<dyn Nested>>> + Send + Sync>>,
+    editor_ctors: HashMap<TypeID, Box<dyn Fn(&Self, TypeTerm, usize) -> Option<Arc<RwLock<dyn Nested+ Send + Sync>>> + Send + Sync>>,
 
     /// morphisms
-    default_constructors: HashMap<TypeTerm, Box<dyn Fn() -> Object + Send + Sync>>,
+    default_constructors: HashMap<TypeTerm, Box<dyn Fn() -> Arc<RwLock<ReprTree>> + Send + Sync>>,
-    morphism_constructors: HashMap<MorphismType, Box<dyn Fn(Object) -> Object + Send + Sync>>,
+    morphism_constructors: HashMap<MorphismType, Box<dyn Fn(Arc<RwLock<ReprTree>>) -> Arc<RwLock<ReprTree>> + Send + Sync>>,
 
     /// recursion
     parent: Option<Arc<RwLock<Context>>>,
@@ -279,7 +269,7 @@ impl Context {
         self.type_dict.type_term_to_str(&t)
     }
 
-    pub fn add_editor_ctor(&mut self, tn: &str, mk_editor: Box<dyn Fn(&Self, TypeTerm) -> Option<Arc<RwLock<dyn Nested>>> + Send + Sync>) {
+    pub fn add_editor_ctor(&mut self, tn: &str, mk_editor: Box<dyn Fn(&Self, TypeTerm, usize) -> Option<Arc<RwLock<dyn Nested + Send + Sync>>> + Send + Sync>) {
         if let Some(tid) = self.type_dict.get_typeid(&tn.into()) {
             self.editor_ctors.insert(tid, mk_editor);
         } else {
@@ -287,10 +277,10 @@ impl Context {
         }
     }
 
-    pub fn make_editor(&self, type_term: TypeTerm) -> Option<Arc<RwLock<dyn Nested>>> {
+    pub fn make_editor(&self, type_term: TypeTerm, depth: usize) -> Option<Arc<RwLock<dyn Nested + Send + Sync>>> {
         if let TypeTerm::Type{ id, args } = type_term.clone() {
             let mk_editor = self.editor_ctors.get(&id)?;
-            mk_editor(self, type_term)
+            mk_editor(self, type_term, depth)
         } else {
             None
         }
@@ -299,7 +289,7 @@ impl Context {
     pub fn add_morphism(
         &mut self,
         morph_type: MorphismType,
-        morph_fn: Box<dyn Fn(Object) -> Object + Send + Sync>,
+        morph_fn: Box<dyn Fn(Arc<RwLock<ReprTree>>) -> Arc<RwLock<ReprTree>> + Send + Sync>,
     ) {
         self.morphism_constructors.insert(morph_type, morph_fn);
     }
@@ -313,15 +303,12 @@ impl Context {
             if let Some(ctor) = self.default_constructors.get(&type_tag) {
                 ctor()
             } else {
-                Object {
+                Arc::new(RwLock::new(ReprTree::new(type_tag)))
-                    type_tag,
-                    repr: Arc::new(RwLock::new(ReprTree::new())),
-                }
             },
         );
     }
 
-    pub fn get_obj(&self, name: &String) -> Option<Object> {
+    pub fn get_obj(&self, name: &String) -> Option<Arc<RwLock<ReprTree>>> {
         if let Some(obj) = self.objects.get(name) {
             Some(obj.clone())
         } else if let Some(parent) = self.parent.as_ref() {
@@ -331,6 +318,7 @@ impl Context {
         }
     }
 
+/*
     pub fn get_obj_port<'a, V: View + ?Sized + 'static>(
         &self,
         name: &str,
@@ -371,10 +359,7 @@ impl Context {
         }) {
             ctor(old_obj.clone())
         } else {
-            Object {
+            Arc::new(RwLock::new(ReprTree::new(dst_type)))
-                type_tag: dst_type,
-                repr: Arc::new(RwLock::new(ReprTree::new())),
-            }
         };
 
         new_obj
@@ -409,7 +394,8 @@ impl Context {
             */
             None
         }
-    }
+}
+    */
 }
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>

nested/src/core/mod.rs

@@ -7,7 +7,7 @@ pub mod view;
 
 pub use {
     channel::{queue_channel, set_channel, singleton_channel, ChannelReceiver, ChannelSender},
-    context::{Context, MorphismMode, MorphismType, Object, ReprTree},
+    context::{Context, MorphismMode, MorphismType, ReprTree},
     observer::{NotifyFnObserver, Observer, ObserverBroadcast, ObserverExt, ResetFnObserver},
     port::{
         AnyInnerViewPort, AnyOuterViewPort, AnyViewPort, InnerViewPort, OuterViewPort, ViewPort,

nested/src/lib.rs

@@ -46,5 +46,6 @@ pub trait Nested
 //   + TreeType
     + Diagnostics
     + Send
+    + Sync
 {}
 

nested/src/list/pty_editor.rs

@@ -1,6 +1,6 @@
 use {
     crate::{
-        core::{OuterViewPort, ViewPort},
+        core::{OuterViewPort, ViewPort, TypeTerm},
         list::{
             ListCursor, ListCursorMode,
             ListSegment, ListSegmentSequence,
@@ -33,7 +33,7 @@ where ItemEditor: Nested + ?Sized + Send + Sync + 'static
     style: SeqDecorStyle,
     depth: usize,
 
-    port: ViewPort<dyn TerminalView>
+    port: OuterViewPort<dyn TerminalView>
 }
 
 impl<ItemEditor> PTYListEditor<ItemEditor>
@@ -45,14 +45,7 @@ where ItemEditor: Nested + ?Sized + Send + Sync + 'static
         split_char: char,
         depth: usize
     ) -> Self {
-        let port = ViewPort::new();
+        Self::from_editor(ListEditor::new(make_item_editor, depth), style, split_char, depth)
-        PTYListEditor {
-            editor: ListEditor::new(make_item_editor, depth),
-            style,
-            depth,
-            split_char,
-            port
-        }
     }
 
     pub fn from_editor(
@@ -61,7 +54,10 @@ where ItemEditor: Nested + ?Sized + Send + Sync + 'static
         split_char: char,
         depth: usize
     ) -> Self {
-        let port = ViewPort::new();
+        let port = editor
+            .get_seg_seq_view()
+            .pty_decorate(style, depth);
+
         PTYListEditor {
             editor,
             split_char,
@@ -96,9 +92,7 @@ impl<ItemEditor> TerminalEditor for PTYListEditor<ItemEditor>
 where ItemEditor: Nested + ?Sized + Send + Sync + 'static
 {
     fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.editor
+        self.port.clone()
-            .get_seg_seq_view()
-            .pty_decorate(self.style, self.depth)
     }
 
     fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
@@ -250,7 +244,7 @@ where ItemEditor: Nested + ?Sized + Send + Sync + 'static
 }
 
 impl<ItemEditor> Diagnostics for PTYListEditor<ItemEditor>
-where ItemEditor: Nested + Diagnostics + ?Sized + Send + Sync + 'static
+where ItemEditor: Nested + ?Sized + Send + Sync + 'static
 {
     fn get_msg_port(&self) -> OuterViewPort<dyn SequenceView<Item = crate::diagnostics::Message>> {
         self.editor

nested/src/make_editor.rs

@@ -1,13 +1,14 @@
 
 use {
     crate::{
-        core::{TypeLadder, Context, OuterViewPort},
+        core::{TypeTerm, TypeLadder, Context, OuterViewPort},
         terminal::{TerminalView, TerminalEditor, TerminalEvent, TerminalEditorResult, make_label},
         tree::{TreeNav},
         integer::PosIntEditor,
         list::{ListEditor, PTYListEditor},
         sequence::{decorator::{SeqDecorStyle}},
         product::editor::ProductEditor,
+        sum::SumEditor,
         char_editor::CharEditor,
         diagnostics::Diagnostics,
         Nested
@@ -48,226 +49,197 @@ struct GrammarRuleEditor {
     rhs: Arc<RwLock<PTYListEditor<RhsNode>>>
 }
 
-pub fn make_editor(ctx: Arc<RwLock<Context>>, t: &TypeLadder, depth: usize) -> Arc<RwLock<dyn Nested + Send + Sync>> {
-    let c = ctx.read().unwrap();
-    if t[0] == c.type_term_from_str("( PosInt 16 BigEndian )").unwrap() {
-        Arc::new(RwLock::new(PosIntEditor::new(16))) as Arc<RwLock<dyn Nested + Send + Sync>>
 
-    } else if t[0] == c.type_term_from_str("( PosInt 10 BigEndian )").unwrap() {
+pub fn init_ctx() -> Arc<RwLock<Context>> {
-        Arc::new(RwLock::new(PosIntEditor::new(10))) as Arc<RwLock<dyn Nested + Send + Sync>>
+        let mut ctx = Arc::new(RwLock::new(Context::new()));
+    for tn in vec![
+        "MachineWord", "MachineInt", "MachineSyllab", "Bits",
+        "Vec", "Stream", "Json",
+        "Sequence", "AsciiString", "UTF-8-String", "Char", "String", "Symbol",
+        "PosInt", "Digit", "LittleEndian", "BigEndian",
+        "DiffStream", "ℕ", "List", "PathSegment", "Path", "Term", "RGB", "Vec3i"
+    ] { ctx.write().unwrap().add_typename(tn.into()); }
 
-    } else if t[0] == c.type_term_from_str("( String )").unwrap() {
+    ctx.write().unwrap().add_editor_ctor(
-        Arc::new(RwLock::new(
+        "Char", Box::new(
-            PTYListEditor::new(
+            |ctx: &Context, ty: TypeTerm, _depth: usize| {
-                Box::new(|| {
+                Some(
                     Arc::new(RwLock::new(CharEditor::new()))
-                }),
+                        as Arc<RwLock<dyn Nested + Send + Sync>>)
-                SeqDecorStyle::DoubleQuote,
+            }
-                '"',
-                depth
         )
-        ))
+    );
-
+    ctx.write().unwrap().add_editor_ctor(
-    } else if t[0] == c.type_term_from_str("( Symbol )").unwrap() {
+        "Symbol", Box::new(
-        Arc::new(RwLock::new(
+            |ctx: &Context, ty: TypeTerm, depth: usize| {
-            PTYListEditor::new(
+                ctx.make_editor(
-                Box::new(|| {
+                    ctx.type_term_from_str("( List Char 0 )").unwrap(),
-                    Arc::new(RwLock::new(CharEditor::new()))
-                }),
-                SeqDecorStyle::Plain,
-                ' ',
                     depth
                 )
-        ))
-
-    } else if t[0] == c.type_term_from_str("( List String )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::new(
-                Box::new({
-                    let d = depth + 1;
-                    let ctx = ctx.clone();
-                    move || {
-                        make_editor(
-                            ctx.clone(),
-                            &vec![ctx.read().unwrap().type_term_from_str("( String )").unwrap()],
-                            d
-                        )
             }
-                }),
-                SeqDecorStyle::EnumSet,
-                '"',
-                depth
         )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
+    );
-    } else if t[0] == c.type_term_from_str("( List Symbol )").unwrap() {
+    ctx.write().unwrap().add_editor_ctor(
-        Arc::new(RwLock::new(
+        "String", Box::new(
-            PTYListEditor::new(
+            |ctx: &Context, ty: TypeTerm, depth: usize| {
-                Box::new({
+                ctx.make_editor(
-                    let d = depth + 1;
+                    ctx.type_term_from_str("( List Char 3 )").unwrap(),
-                    let ctx = ctx.clone();
+                    depth
-                    move || {
-                        make_editor(
-                            ctx.clone(),
-                            &vec![ctx.read().unwrap().type_term_from_str("( Symbol )").unwrap()],
-                            d
                 )
             }
-                }),
-                SeqDecorStyle::EnumSet,
-                ' ',
-                depth
         )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
+    );
-
+    ctx.write().unwrap().add_editor_ctor(
-    } else if t[0] == c.type_term_from_str("( List Char )").unwrap() {
+        "PosInt", Box::new(
-        Arc::new(RwLock::new(
+            |ctx: &Context, ty: TypeTerm, _depth: usize| {
-            PTYListEditor::new(
+                match ty {
-                Box::new(
+                    TypeTerm::Type {
-                    || { Arc::new(RwLock::new(CharEditor::new())) }
+                        id, args
-                ),
+                    } => {
-                SeqDecorStyle::Plain,
+                        if args.len() > 0 {
-                '\n',
+                            match args[0] {
-                depth+1
+                                TypeTerm::Num(radix) => {
+                                    Some(
+                                        Arc::new(RwLock::new(PosIntEditor::new(radix as u32)))
+                                            as Arc<RwLock<dyn Nested + Send + Sync>>
                                     )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
-
-    } else if t[0] == c.type_term_from_str("( List ℕ )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::new(
-                Box::new(|| {
-                    Arc::new(RwLock::new(PosIntEditor::new(16)))
-                }),
-                SeqDecorStyle::EnumSet,
-                ',',
-                depth
-            )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
-
-    } else if t[0] == c.type_term_from_str("( Path )").unwrap() {
-        Arc::new(RwLock::new(PTYListEditor::new(
-            Box::new({
-                let d= depth+1;
-                move || {
-                    Arc::new(RwLock::new(PTYListEditor::new(
-                        Box::new(|| {
-                            Arc::new(RwLock::new(CharEditor::new()))
-                        }),
-                        SeqDecorStyle::Plain,
-                        '\n',
-                        d
-                    )))
-            }}),
-            SeqDecorStyle::Path,
-            '/',
-            depth
-        ))) as Arc<RwLock<dyn Nested + Send + Sync>>
-
-    } else if t[0] == c.type_term_from_str("( List Path )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::new(
-                Box::new({
-                    let d = depth + 1;
-                    let ctx = ctx.clone();
-                    move || {
-                        make_editor(
-                            ctx.clone(),
-                            &vec![ctx.read().unwrap().type_term_from_str("( Path )").unwrap()],
-                            d
-                        )
-                    }
-                }),
-                SeqDecorStyle::EnumSet,
-                ',',
-                depth
-            )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
-
-    } else if t[0] == c.type_term_from_str("( List RGB )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::<dyn Nested + Send +Sync>::new(
-                {
-                    let d = depth+1;
-                    let ctx = ctx.clone();
-                    Box::new(move || {
-                        make_editor(ctx.clone(), &vec![ ctx.read().unwrap().type_term_from_str("( RGB )").unwrap() ], d)
-                    })
                                 },
-                SeqDecorStyle::VerticalSexpr,
+                                _ => None
-                ',',
+                            }
-                depth
+                        } else {
+                            None
+                        }
+                    }
+                    _ => None
+                }
+            }
         )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
+    );
     
-    } else if t[0] == c.type_term_from_str("( RGB )").unwrap() {
+    ctx.write().unwrap().add_editor_ctor(
-        Arc::new(RwLock::new(ProductEditor::new(depth, ctx.clone())
+        "List", Box::new({
+            let ctx = ctx.clone();
+            move |c_: &Context, ty: TypeTerm, depth: usize| {
+                match ty {
+                    TypeTerm::Type {
+                        id, args
+                    } => {
+                        if args.len() > 0 {
+                            // todod factor style out of type arGS
+                            let style = if args.len() > 1 {
+                                match args[1] {
+                                    TypeTerm::Num(0) => SeqDecorStyle::Plain,
+                                    TypeTerm::Num(1) => SeqDecorStyle::HorizontalSexpr,
+                                    TypeTerm::Num(2) => SeqDecorStyle::VerticalSexpr,
+                                    TypeTerm::Num(3) => SeqDecorStyle::DoubleQuote,
+                                    TypeTerm::Num(4) => SeqDecorStyle::Tuple,
+                                    TypeTerm::Num(5) => SeqDecorStyle::EnumSet,
+                                    TypeTerm::Num(6) => SeqDecorStyle::Path,
+                                    _ => SeqDecorStyle::HorizontalSexpr
+                                }
+                            }else {
+                                SeqDecorStyle::HorizontalSexpr
+                            };
+
+                            let delim = if args.len() > 1 {
+                                match args[1] {
+                                    TypeTerm::Num(0) => ' ',
+                                    TypeTerm::Num(1) => ' ',
+                                    TypeTerm::Num(2) => '\n',
+                                    TypeTerm::Num(3) => '"',
+                                    TypeTerm::Num(4) => ',',
+                                    TypeTerm::Num(5) => ',',
+                                    TypeTerm::Num(6) => '/',
+                                    _ => '\0'
+                                }
+                            }else {
+                                '\0'
+                            };
+
+                            Some(
+                                Arc::new(RwLock::new(PTYListEditor::new(
+                                    Box::new({
+                                        let ctx = ctx.clone();
+                                        move || {
+                                            ctx.read().unwrap().make_editor(args[0].clone(), depth + 1).unwrap()
+                                        }
+                                    }),
+                                    style,
+                                    delim,
+                                    depth
+                                    )))
+                                    as Arc<RwLock<dyn Nested + Send + Sync>>
+                            )
+                        } else {
+                            None
+                        }
+                    }
+                    _ => None
+                }
+            }
+        }
+    ));
+
+    ctx.write().unwrap().add_editor_ctor(
+        "RGB", Box::new({
+            let c = ctx.clone();
+            move |ctx: &Context, ty: TypeTerm, depth: usize| {
+                Some(Arc::new(RwLock::new(ProductEditor::new(depth, c.clone())
                                           .with_t(Point2::new(0, 0), "{   ")
                                           .with_t(Point2::new(1, 1), "r: ")
-                             .with_n(Point2::new(2, 1), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
+                                          .with_n(Point2::new(2, 1), vec![ ctx.type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
                                           .with_t(Point2::new(1, 2), "g: ")
-                             .with_n(Point2::new(2, 2), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
+                                          .with_n(Point2::new(2, 2), vec![ ctx.type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
                                           .with_t(Point2::new(1, 3), "b: ")
-                             .with_n(Point2::new(2, 3), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
+                                          .with_n(Point2::new(2, 3), vec![ ctx.type_term_from_str("( PosInt 16 BigEndian )").unwrap() ] )
                                           .with_t(Point2::new(0, 4), "}   ")
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
+                )) as Arc<RwLock<dyn Nested + Send + Sync>>)
-
-    } else if t[0] == c.type_term_from_str("( Vec3i )").unwrap() {
-        Arc::new(RwLock::new(ProductEditor::new(depth, ctx.clone())
-                             .with_t(Point2::new(0, 0), "{")
-                             .with_t(Point2::new(1, 1), "x: ")
-                             .with_n(Point2::new(2, 1), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 10 BigEndian )").unwrap() ] )
-                             .with_t(Point2::new(1, 2), "y: ")
-                             .with_n(Point2::new(2, 2), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 10 BigEndian )").unwrap() ] )
-                             .with_t(Point2::new(1, 3), "z: ")
-                             .with_n(Point2::new(2, 3), vec![ ctx.read().unwrap().type_term_from_str("( PosInt 10 BigEndian )").unwrap() ] )
-                             .with_t(Point2::new(0, 4), "}")
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
-
-    } else if t[0] == c.type_term_from_str("( Json )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::<dyn Nested + Send + Sync>::new(
-                Box::new({
-                    let ctx = ctx.clone();
-                    move || {
-                        Arc::new(RwLock::new(ProductEditor::new(depth, ctx.clone())
-                                             .with_n(Point2::new(0, 0), vec![ ctx.read().unwrap().type_term_from_str("( String )").unwrap() ] )
-                                             .with_t(Point2::new(1, 0), ": ")
-                                             .with_n(Point2::new(2, 0), vec![ ctx.read().unwrap().type_term_from_str("( Json )").unwrap() ] )
-                        )) as Arc<RwLock<dyn Nested + Send + Sync>>
             }
-                }),
+        }));
-                SeqDecorStyle::VerticalSexpr,
+
-                '\n',
+    ctx.write().unwrap().add_editor_ctor(
+        "PathSegment", Box::new(
+            |ctx: &Context, ty: TypeTerm, depth: usize| {
+                ctx.make_editor(
+                    ctx.type_term_from_str("( List Char 0 )").unwrap(),
                     depth
                 )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
-            
-    } else if t[0] == c.type_term_from_str("( List Term )").unwrap() {
-        Arc::new(RwLock::new(
-            PTYListEditor::<dyn Nested + Send + Sync>::new(
-                Box::new({
-                    let ctx = ctx.clone();
-                    move || {
-                        make_editor(ctx.clone(), &vec![ ctx.read().unwrap().type_term_from_str("( Term )").unwrap() ], depth+1)
             }
-                }),
-                SeqDecorStyle::Tuple,
-                '\n',
-                depth
         )
-        )) as Arc<RwLock<dyn Nested + Send + Sync>>
+    );
+    ctx.write().unwrap().add_editor_ctor(
+        "Path", Box::new(
+            |ctx: &Context, ty: TypeTerm, depth: usize| {
+                ctx.make_editor(
+                    ctx.type_term_from_str("( List PathSegment 6 )").unwrap(),
+                    depth+1
+                )
+            }
+        )
+    );
 
-    } else { // else: term
+    ctx.write().unwrap().add_editor_ctor(
+        "Term", Box::new(
+            |ctx: &Context, ty: TypeTerm, depth: usize| {
+                let mut s = SumEditor::new(
+                    vec![
+                        ctx.make_editor(ctx.type_term_from_str("( Symbol )").unwrap(), depth+1).unwrap(),
+                        ctx.make_editor(ctx.type_term_from_str("( PosInt 10 )").unwrap(), depth+1).unwrap(),
+                        ctx.make_editor(ctx.type_term_from_str("( List Term )").unwrap(), depth+1).unwrap(),
+                    ]
+                );
+                s.select(0);
+                Some(
                     Arc::new(RwLock::new(
-            PTYListEditor::new(
+                        s
-                || {
-                    Arc::new(RwLock::new(CharEditor::new()))
-                },
-                SeqDecorStyle::DoubleQuote,
-                ' ',
-                depth
-            )
                     ))
+                )
             }
+        )
+    );
+
+    ctx
 }
 
 
+

nested/src/product/editor.rs

@@ -10,12 +10,9 @@ use {
         list::ListCursorMode,
         product::{segment::ProductEditorSegment},
         sequence::{SequenceView},
-        make_editor::make_editor,
-
         tree::{TreeNav, TreeNavResult},
         diagnostics::{Diagnostics, Message},
         terminal::{TerminalStyle},
-
         Nested
     },
     cgmath::{Vector2, Point2},
@@ -140,7 +137,6 @@ impl ProductEditor {
                     *cur_depth = cur.tree_addr.len();
                 }
                 
-                
                 *cur_dist = cur.tree_addr[0] - idx
             } else {
                 *cur_dist = isize::MAX;
@@ -221,7 +217,7 @@ impl TerminalEditor for ProductEditor {
                         }
                     }
                 } else {
-                    let e = make_editor(self.ctx.clone(), t, *ed_depth+1);
+                    let e = self.ctx.read().unwrap().make_editor(t[0].clone(), *ed_depth+1).unwrap();
                     *editor = Some(e.clone());
                     update_segment = true;
 

nested/src/product/nav.rs

@@ -3,7 +3,6 @@ use {
         list::ListCursorMode,
         tree::{TreeNav, TreeNavResult, TreeCursor},
         product::{segment::ProductEditorSegment, ProductEditor},
-        make_editor::{make_editor},
         Nested
     },
     cgmath::{Point2, Vector2},
@@ -66,14 +65,13 @@ impl TreeNav for ProductEditor {
 
         if c.tree_addr.len() > 0 {
             self.cursor = Some(crate::modulo(c.tree_addr.remove(0), self.n_indices.len() as isize));
-
             if let Some(mut element) = self.get_cur_segment_mut() {
                 if let Some(ProductEditorSegment::N{ t, editor, ed_depth, cur_depth, cur_dist:_ }) = element.deref_mut() {
                     if let Some(e) = editor {
                         e.write().unwrap().goto(c.clone());
                     } else if c.tree_addr.len() > 0 {
                         // create editor
-                        let e = make_editor(self.ctx.clone(), t, *ed_depth+1);
+                        let e = self.ctx.read().unwrap().make_editor(t[0].clone(), *ed_depth+1).unwrap();
                         *editor = Some(e.clone());
                         let mut e = e.write().unwrap();
                         e.goto(c.clone());
@@ -91,6 +89,10 @@ impl TreeNav for ProductEditor {
 
             TreeNavResult::Continue
         } else {
+            if let Some(mut ed) = self.get_cur_editor() {
+                ed.write().unwrap().goto(TreeCursor::none());
+            }
+
             self.cursor = None;
 
             if let Some(i) = old_cursor {
@@ -127,7 +129,8 @@ impl TreeNav for ProductEditor {
                                 e.goby(direction);
                             } else {
                                 // create editor
-                                let e = make_editor(self.ctx.clone(), t, *ed_depth+1);
+
+                                let e = self.ctx.read().unwrap().make_editor(t[0].clone(), *ed_depth+1).unwrap();
                                 *editor = Some(e.clone());
                                 let mut e = e.write().unwrap();
                                 e.goby(direction);

nested/src/sum/editor.rs

@@ -10,8 +10,6 @@ use {
         list::ListCursorMode,
         product::{segment::ProductEditorSegment},
         sequence::{SequenceView},
-        make_editor::make_editor,
-
         tree::{TreeNav, TreeCursor, TreeNavResult},
         diagnostics::{Diagnostics, Message},
         terminal::{TerminalStyle},

shell/src/command.rs

@@ -18,7 +18,6 @@ use {
         },
         tree::{TreeCursor, TreeNav, TreeNavResult},
         diagnostics::{Diagnostics},
-        make_editor::make_editor,
         product::ProductEditor,
         sum::SumEditor,
         Nested
@@ -227,11 +226,9 @@ impl TerminalEditor for Commander {
             match event {
                 TerminalEvent::Input(Event::Key(Key::Char('\n'))) => {
                     let mut c = cmd_editor.write().unwrap();
-                    if let TerminalEditorResult::Exit = c.handle_terminal_event(&TerminalEvent::Input(Event::Key(Key::Char('\n')))) {
+                    if c.nexd() == TreeNavResult::Exit {
-
                         // run
                         c.goto(TreeCursor::none());
-                        c.up();
 
                         TerminalEditorResult::Exit
                     } else {

shell/src/main.rs

@@ -25,6 +25,9 @@ use {
         tree::{TreeNav, TreeCursor, TreeNavResult},
         vec::VecBuffer,
         integer::{PosIntEditor},
+        char_editor::CharEditor,
+        product::ProductEditor,
+        sum::SumEditor,
         diagnostics::{Diagnostics},
         Nested
     },
@@ -50,15 +53,9 @@ async fn main() {
     });
 
     // Type Context //
-    let mut ctx = Arc::new(RwLock::new(Context::new()));
+    let ctx = nested::make_editor::init_ctx();
-    for tn in vec![
-        "MachineWord", "MachineInt", "MachineSyllab", "Bits",
-        "Vec", "Stream", "Json",
-        "Sequence", "AsciiString", "UTF-8-String", "Char", "String", "Symbol",
-        "PosInt", "Digit", "LittleEndian", "BigEndian",
-        "DiffStream", "ℕ", "List", "Path", "Term", "RGB", "Vec3i"
-    ] { ctx.write().unwrap().add_typename(tn.into()); }
     
+    let c = ctx.clone();
     let mut process_list_editor =
         PTYListEditor::new(
             Box::new( move || {
@@ -292,3 +289,4 @@ async fn main() {
 
     term_writer.show().await.expect("output error!");
 }
+