listeditor cleanup

nested/src/char_editor.rs

@@ -0,0 +1,68 @@
+use {
+    crate::{
+        core::{OuterViewPort, ViewPort},
+        list::{ListEditor},
+        sequence::{SequenceView, SequenceViewExt},
+        singleton::{SingletonBuffer, SingletonView},
+        terminal::{
+            TerminalAtom, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle,
+            TerminalView,
+        },
+        tree_nav::{TerminalTreeEditor, TreeCursor, TreeNav, TreeNavResult},
+    },
+    std::sync::Arc,
+    std::sync::RwLock,
+    termion::event::{Event, Key},
+    cgmath::Vector2
+};
+
+pub struct CharEditor {
+    data: SingletonBuffer<Option<char>>
+}
+
+impl CharEditor {
+    pub fn new() -> Self {
+        CharEditor {
+            data: SingletonBuffer::new(None)
+        }
+    }
+
+    pub fn get_port(&self) -> OuterViewPort<dyn SingletonView<Item = Option<char>>> {
+        self.data.get_port()
+    }
+}
+
+impl TreeNav for CharEditor {}
+impl TerminalEditor for CharEditor {
+    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
+        self.data
+            .get_port()
+            .map(move |c| {                
+                TerminalAtom::new(
+                    c.unwrap_or('?'),
+                    TerminalStyle::fg_color((100, 140, 100)),
+                )
+            })
+            .to_grid()
+    }
+
+    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
+        match event {
+            TerminalEvent::Input(Event::Key(Key::Char('\n'))) => TerminalEditorResult::Exit,
+            TerminalEvent::Input(Event::Key(Key::Char(c))) => {
+                self.data.set(Some(*c));
+                TerminalEditorResult::Exit
+            }
+            TerminalEvent::Input(Event::Key(Key::Backspace))
+            | TerminalEvent::Input(Event::Key(Key::Delete)) => {
+                self.data.set(None);
+                TerminalEditorResult::Exit
+            }
+            _ => TerminalEditorResult::Exit,
+        }
+    }
+}
+
+impl TerminalTreeEditor for CharEditor {}
+
+

nested/src/color.rs

@@ -0,0 +1,25 @@
+use {
+    crate::terminal::TerminalStyle,
+};
+
+pub fn bg_style_from_depth(depth: usize) -> TerminalStyle {
+    if depth == 0 {
+        TerminalStyle::default()
+    } else {
+        TerminalStyle::bg_color((
+            (30.0 / ( 0.90*depth as f64 )) as u8,
+            (30.0 / ( 0.93*depth as f64 )) as u8,
+            (50.0 / ( 0.95*depth as f64 )) as u8
+        ))
+    }
+}
+
+pub fn fg_style_from_depth(depth: usize) -> TerminalStyle {
+    match depth % 3 {
+        0 => TerminalStyle::fg_color((200, 200, 80)),
+        1 => TerminalStyle::fg_color((80, 200, 200)),
+        2 => TerminalStyle::fg_color((150, 150, 200)),
+        _ => TerminalStyle::default()
+    }
+}
+

nested/src/index/buffer.rs

@@ -1,6 +1,6 @@
 use {
     crate::{
-        core::{InnerViewPort, ViewPort, Observer, ObserverBroadcast, View},
+        core::{InnerViewPort, OuterViewPort, ViewPort, Observer, ObserverBroadcast, View},
         index::{IndexArea, IndexView},
     },
     std::sync::RwLock,
@@ -64,6 +64,10 @@ where
         IndexBuffer::with_port(ViewPort::new().into_inner())
     }
 
+    pub fn get_port(&self) -> OuterViewPort<dyn IndexView<Key, Item = Item>> {
+        self.port.0.outer()
+    }
+
     pub fn insert(&mut self, key: Key, item: Item) {
         self.data.write().unwrap().insert(key.clone(), item);
         self.port.notify(&IndexArea::Set(vec![key]));

nested/src/integer/editor.rs

@@ -127,6 +127,9 @@ impl TreeNav for PosIntEditor {
     fn get_cursor(&self) -> TreeCursor {
         self.digits_editor.get_cursor()
     }
+    fn get_cursor_warp(&self) -> TreeCursor {
+        self.digits_editor.get_cursor_warp()
+    }
     fn goto(&mut self, cur: TreeCursor) -> TreeNavResult {
         self.digits_editor.goto(cur)
     }

nested/src/lib.rs

@@ -1,24 +1,34 @@
 #![feature(trait_alias)]
 
+// general
 pub mod core;
 pub mod projection;
+pub mod bimap;
+pub mod modulo;
+pub use modulo::modulo;
 
-pub mod grid;
+// semantics
+pub mod singleton;
+pub mod sequence;
 pub mod index;
-pub mod integer;
+pub mod grid;
+
+// implementation
+pub mod vec;
+
+// editors
+pub mod tree_nav;
 pub mod product;
 pub mod list;
-pub mod sequence;
+
-pub mod singleton;
+// high-level types
-pub mod terminal;
+pub mod char_editor;
-pub mod vec;
+pub mod integer;
 pub mod make_editor;
 
-pub mod tree_nav;
+// display
-
+pub mod color;
-pub mod string_editor;
+pub mod terminal;
-
-pub mod bimap;
 
 pub fn magic_header() {
     eprintln!("<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>");

nested/src/list/cursor.rs

@@ -1,33 +1,34 @@
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum ListCursorMode {
     Insert,
-    Select,
+    Select
-    Modify,
 }
 
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub struct ListCursor {
     pub mode: ListCursorMode,
-    pub idx: Option<usize>,
+    pub idx: Option<isize>,
 }
 
-impl Default for ListCursor {
+impl ListCursor {
-    fn default() -> Self {
+    pub fn home() -> Self {
         ListCursor {
-            mode: ListCursorMode::Select,
+            mode: ListCursorMode::Insert,
+            idx: Some(0)
+        }
+    }
+
+    pub fn none() -> Self {
+        ListCursor {
+            mode: ListCursorMode::Insert,
             idx: None,
         }        
     }
 }
 
-/*
+impl Default for ListCursor {
-pub trait ListNav {
+    fn default() -> Self {
-    fn pxev(&mut self) -> ListNavResult;
+        ListCursor::none()
-    fn nexd(&mut self) -> ListNavResult;
+    }
-    fn pua(&mut self) -> ListNavResult;
-    fn end(&mut self) -> ListNavResult;
-
-    fn set_cursor(&mut self, new_cursor: Option<ListCursor>) -> ListNavResult;
-    fn get_cursor(&self) -> Option<ListCursor>;
 }
-*/
+

nested/src/list/editor.rs

@@ -2,10 +2,11 @@ use {
     crate::{
         core::{OuterViewPort, ViewPort},
         list::{
-            editor_view::{ListEditorView, ListEditorViewSegment},
+            ListCursor, ListCursorMode,
-            ListCursor, ListCursorMode, ListDecoration, SExprView,
+            ListSegment, ListSegmentSequence,
+            segment::PTYSegment
         },
-        sequence::SequenceView,
+        sequence::{SequenceView},
         singleton::{SingletonBuffer, SingletonView},
         terminal::{
             make_label, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle,
@@ -13,696 +14,62 @@ use {
         },
         tree_nav::{TerminalTreeEditor, TreeCursor, TreeNav, TreeNavResult},
         vec::VecBuffer,
+        color::{bg_style_from_depth, fg_style_from_depth}
     },
     std::sync::{Arc, RwLock},
     termion::event::{Event, Key},
 };
 
-#[derive(Clone, Copy)]
+//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
-pub enum ListEditorStyle {
+                                                            
-    HorizontalSexpr,
+pub struct ListEditor<ItemEditor>
-    VerticalSexpr,
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
-    Tuple(usize),
+{
-    Path,
+    pub(super) cursor: SingletonBuffer<ListCursor>,
-    String,
+    pub(super) data: VecBuffer<Arc<RwLock<ItemEditor>>>,
-    Clist,
+    pub(super) make_item_editor: Box<dyn Fn() -> Arc<RwLock<ItemEditor>> + Send + Sync>,
-    Hex,
+
-    Plain,
+    pub(super) depth: usize,
+    pub(super) cur_dist: Arc<RwLock<usize>>,
 }
 
-pub struct ListEditor<ItemEditor, FnMakeItemEditor>
+impl<ItemEditor> ListEditor<ItemEditor>
-where
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
-    ItemEditor: TerminalEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>>,
 {
-    cursor: SingletonBuffer<ListCursor>,
+    pub fn new(make_item_editor: impl Into<Box<dyn Fn() -> Arc<RwLock<ItemEditor>> + Send + Sync>>, depth: usize) -> Self {
-    data: VecBuffer<Arc<RwLock<ItemEditor>>>,
+        ListEditor {
-
+            cursor: SingletonBuffer::new(ListCursor::default()),
-    cursor_port: ViewPort<dyn SingletonView<Item = ListCursor>>,
+            data: VecBuffer::<Arc<RwLock<ItemEditor>>>::new(),
-    data_port: ViewPort<RwLock<Vec<Arc<RwLock<ItemEditor>>>>>,
+            make_item_editor: make_item_editor.into(),
-
+            depth,
-    make_item_editor: FnMakeItemEditor,
+            cur_dist: Arc::new(RwLock::new(0)),
-
-    style: ListEditorStyle,
-    _level: usize,
-    cur_dist: Arc<RwLock<usize>>,
-}
-
-impl<ItemEditor, FnMakeItemEditor> TreeNav for ListEditor<ItemEditor, FnMakeItemEditor>
-where
-    ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>>,
-{
-    fn get_cursor(&self) -> TreeCursor {
-        let cur = self.cursor.get();
-        match cur.mode {
-            ListCursorMode::Insert | ListCursorMode::Select => TreeCursor {
-                leaf_mode: cur.mode,
-                tree_addr: if let Some(i) = cur.idx {
-                    vec![i]
-                } else {
-                    vec![]
-                },
-            },
-            ListCursorMode::Modify => {
-                if let Some(i) = cur.idx {
-                    if i < self.data.len() {
-                        let mut sub_cur = self.data.get(i).read().unwrap().get_cursor();
-                        sub_cur.tree_addr.insert(0, i);
-                        return sub_cur;
-                    }
-                }
-                TreeCursor {
-                    leaf_mode: cur.mode,
-                    tree_addr: vec![],
-                }
-            }
         }
     }
 
-    fn goto(&mut self, new_cur: TreeCursor) -> TreeNavResult {
-        let old_cur = self.cursor.get();
-        if old_cur.mode == ListCursorMode::Modify {
-            if let Some(i) = old_cur.idx {
-                let ce = self.data.get_mut(i);
-                let mut cur_edit = ce.write().unwrap();
-                cur_edit.goto(TreeCursor::default());
-            }
-        }
-
-        if new_cur.tree_addr.len() == 1 {
-            self.cursor.set(ListCursor {
-                mode: new_cur.leaf_mode,
-                idx: Some(new_cur.tree_addr[0]),
-            });
-            TreeNavResult::Continue
-        } else if new_cur.tree_addr.len() > 1 && new_cur.tree_addr[0] < self.data.len() {
-            self.cursor.set(ListCursor {
-                mode: ListCursorMode::Modify,
-                idx: Some(new_cur.tree_addr[0]),
-            });
-
-            let ne = self.data.get_mut(new_cur.tree_addr[0]);
-            let mut nxt_edit = ne.write().unwrap();
-
-            nxt_edit.goto(TreeCursor {
-                leaf_mode: new_cur.leaf_mode,
-                tree_addr: new_cur.tree_addr[1..].iter().cloned().collect(),
-            });
-
-            TreeNavResult::Continue
-        } else {
-            self.cursor.set(ListCursor {
-                mode: new_cur.leaf_mode,
-                idx: None,
-            });
-            TreeNavResult::Continue
-        }
-    }
-
-    fn goto_end(&mut self) -> TreeNavResult {
-        let mut cur = self.cursor.get();
-        let i = cur.idx.unwrap_or(0);
-
-        if self.data.len() == 0 && cur.idx.is_none() {
-            self.cursor.set(ListCursor {
-                mode: ListCursorMode::Insert,
-                idx: Some(0),
-            });
-            return TreeNavResult::Continue;
-        }
-
-        if i < self.data.len() {
-            match cur.mode {
-                ListCursorMode::Insert => {
-                    if i < self.data.len() || cur.idx.is_none() {
-                        cur.idx = Some(self.data.len());
-                        self.cursor.set(cur);
-                        TreeNavResult::Continue
-                    } else {
-                        self.cursor.set(ListCursor::default());
-                        TreeNavResult::Exit
-                    }
-                }
-                ListCursorMode::Select => {
-                    if self.data.len() == 0 && cur.idx.is_none() {
-                        self.cursor.set(ListCursor {
-                            mode: ListCursorMode::Insert,
-                            idx: Some(0),
-                        });
-                        return TreeNavResult::Continue;
-                    }
-
-                    if i + 1 < self.data.len() || cur.idx.is_none() {
-                        cur.idx = Some(self.data.len() - 1);
-                        self.cursor.set(cur);
-                        TreeNavResult::Continue
-                    } else {
-                        self.cursor.set(ListCursor::default());
-                        TreeNavResult::Exit
-                    }
-                }
-                ListCursorMode::Modify => {
-                    let ce = self.data.get_mut(i);
-                    let mut cur_edit = ce.write().unwrap();
-                    let cur_mode = cur_edit.get_cursor().leaf_mode;
-                    let depth = cur_edit.get_cursor().tree_addr.len();
-                    match cur_edit.goto_end() {
-                        TreeNavResult::Continue => TreeNavResult::Continue,
-                        TreeNavResult::Exit => {
-                            drop(cur_edit);
-
-                            self.up();
-
-                            if i + 1 < self.data.len() {
-                                self.set_mode(ListCursorMode::Select);
-                                self.nexd();
-
-                                for _x in 1..depth {
-                                    self.dn();
-                                    self.goto_home();
-                                }
-
-                                self.set_leaf_mode(cur_mode);
-                                self.dn();
-                                self.goto_end();
-
-                                return TreeNavResult::Continue;
-                            }
-
-                            self.cursor.set(ListCursor::default());
-                            TreeNavResult::Exit
-                        }
-                    }
-                }
-            }
-        } else {
-            self.cursor.set(ListCursor::default());
-            TreeNavResult::Exit
-        }
-    }
-
-    fn goto_home(&mut self) -> TreeNavResult {
-        let mut cur = self.cursor.get();
-        if self.data.len() == 0 && cur.idx.is_none() {
-            self.cursor.set(ListCursor {
-                mode: ListCursorMode::Insert,
-                idx: Some(0),
-            });
-            return TreeNavResult::Continue;
-        }
-
-        match cur.mode {
-            ListCursorMode::Insert | ListCursorMode::Select => {
-                if cur.idx != Some(0) {
-                    self.cursor.set(ListCursor {
-                        mode: if self.data.len() == 0 {
-                            ListCursorMode::Insert
-                        } else {
-                            cur.mode
-                        },
-                        idx: Some(0),
-                    });
-                    TreeNavResult::Continue
-                } else {
-                    self.cursor.set(ListCursor::default());
-                    TreeNavResult::Exit
-                }
-            }
-            ListCursorMode::Modify => {
-                if let Some(ce) = self.get_item() {
-                    let mut cur_edit = ce.write().unwrap();
-                    let cur_mode = cur_edit.get_cursor().leaf_mode;
-                    let depth = cur_edit.get_cursor().tree_addr.len();
-
-                    match cur_edit.goto_home() {
-                        TreeNavResult::Exit => {
-                            drop(cur_edit);
-
-                            if let Some(i) = cur.idx {
-                                if i > 0 {
-                                    self.set_mode(ListCursorMode::Select);
-                                    self.pxev();
-
-                                    for _x in 1..depth {
-                                        self.dn();
-                                        self.goto_end();
-                                    }
-
-                                    self.dn();
-                                    self.set_leaf_mode(cur_mode);
-                                    //self.goto_home();
-                                    return TreeNavResult::Continue;
-                                }
-                            }
-                        }
-                        TreeNavResult::Continue => { return TreeNavResult::Continue; }
-                    };
-                }
-
-                self.cursor.set(ListCursor::default());
-                TreeNavResult::Exit
-            }
-        }
-    }
-
-    fn up(&mut self) -> TreeNavResult {
-        let cur = self.cursor.get();
-        if cur.mode == ListCursorMode::Modify {
-            if let Some(i) = cur.idx {
-                let ce = self.data.get_mut(i);
-                let mut cur_edit = ce.write().unwrap();
-                let mode = cur_edit.get_cursor().leaf_mode;
-
-                match cur_edit.up() {
-                    TreeNavResult::Exit => {
-                        self.set_mode(mode);
-                    }
-                    TreeNavResult::Continue => {}
-                }
-
-                TreeNavResult::Continue
-            } else {
-                TreeNavResult::Exit
-            }
-        } else {
-            self.cursor.set(ListCursor {
-                mode: cur.mode,
-                idx: None,
-            });
-            TreeNavResult::Exit
-        }
-    }
-
-    fn dn(&mut self) -> TreeNavResult {
-        let mut cur = self.cursor.get();
-
-        if cur.idx.is_none() {
-            self.goto_home()
-        } else {
-            match cur.mode {
-                ListCursorMode::Insert | ListCursorMode::Select => {
-                    if let Some(i) = cur.idx {
-                        if i < self.data.len() {
-                            self.set_mode(ListCursorMode::Modify);
-                            self.data.get_mut(i).write().unwrap().goto(TreeCursor {
-                                leaf_mode: cur.mode,
-                                tree_addr: vec![],
-                            });
-                            self.data.get_mut(i).write().unwrap().dn();
-                            *self.cur_dist.write().unwrap() += 1;
-                        }
-                    }
-                    TreeNavResult::Continue
-                }
-                ListCursorMode::Modify => self.get_item().unwrap().write().unwrap().dn(),
-            }
-        }
-    }
-
-    fn pxev(&mut self) -> TreeNavResult {
-        let mut cur = self.cursor.get();
-        if let Some(i) = cur.idx {
-            match cur.mode {
-                ListCursorMode::Insert | ListCursorMode::Select => {
-                    if i > 0 {
-                        cur.idx = Some(i - 1);
-                        self.cursor.set(cur);
-                        TreeNavResult::Continue
-                    } else {
-                        self.cursor.set(ListCursor::default());
-                        TreeNavResult::Exit
-                    }
-                }
-                ListCursorMode::Modify => {
-                    let ce = self.get_item().unwrap();
-                    let mut cur_edit = ce.write().unwrap();
-
-                    let cur_mode = cur_edit.get_cursor().leaf_mode;
-                    let depth = cur_edit.get_cursor().tree_addr.len();
-
-                    match cur_edit.pxev() {
-                        TreeNavResult::Exit => {
-                            drop(cur_edit);
-                            self.up();
-
-                            if i > 0 {
-                                self.set_mode(ListCursorMode::Select);
-                                self.pxev();
-
-                                for _x in 1..depth {
-                                    self.dn();
-                                    self.goto_end();
-                                }
-
-                                self.set_leaf_mode(cur_mode);
-                                self.dn();
-                                self.goto_end();
-                                TreeNavResult::Continue
-                            } else {
-                                TreeNavResult::Exit
-                            }
-                        }
-                        TreeNavResult::Continue => TreeNavResult::Continue,
-                    }
-                }
-            }
-        } else {
-            TreeNavResult::Exit
-        }
-    }
-
-    fn nexd(&mut self) -> TreeNavResult {
-        let mut cur = self.cursor.get();
-        if let Some(i) = cur.idx {
-            match cur.mode {
-                ListCursorMode::Insert => {
-                    if i < self.data.len() {
-                        cur.idx = Some(i + 1);
-                        self.cursor.set(cur);
-                        TreeNavResult::Continue
-                    } else {
-                        self.cursor.set(ListCursor::default());
-                        TreeNavResult::Exit
-                    }
-                }
-                ListCursorMode::Select => {
-                    if i + 1 < self.data.len() {
-                        cur.idx = Some(i + 1);
-                        self.cursor.set(cur);
-                        TreeNavResult::Continue
-                    } else {
-                        self.cursor.set(ListCursor::default());
-                        TreeNavResult::Exit
-                    }
-                }
-                ListCursorMode::Modify => {
-                    let ce = self.data.get(i);
-                    let mut cur_edit = ce.write().unwrap();
-
-                    let depth = cur_edit.get_cursor().tree_addr.len();
-                    let cur_mode = cur_edit.get_cursor().leaf_mode;
-
-                    match cur_edit.nexd() {
-                        TreeNavResult::Exit => {
-                            drop(cur_edit);
-                            drop(ce);
-                            //self.up();
-
-                            if i + 1 < self.data.len() {
-                                self.set_mode(ListCursorMode::Select);
-                                self.nexd();
-
-                                for _x in 1..depth {
-                                    self.dn();
-                                }
-
-                                self.set_leaf_mode(cur_mode);
-                                self.dn();
-
-                                TreeNavResult::Continue
-                            } else {
-                                self.cursor.set(ListCursor::default());
-                                TreeNavResult::Exit
-                            }
-                        }
-                        TreeNavResult::Continue => TreeNavResult::Continue,
-                    }
-                }
-            }
-        } else {
-            TreeNavResult::Exit
-        }
-    }
-}
-
-impl<ItemEditor, FnMakeItemEditor> TerminalEditor for ListEditor<ItemEditor, FnMakeItemEditor>
-where
-    ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>>,
-{
-    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
-        match self.style {
-            ListEditorStyle::HorizontalSexpr => self.horizontal_sexpr_view(),
-            ListEditorStyle::VerticalSexpr => self.vertical_sexpr_view(),
-            ListEditorStyle::Tuple(depth) => self.tuple_view(depth),
-            ListEditorStyle::Path => self.path_view(),
-            ListEditorStyle::String => self.string_view(),
-            ListEditorStyle::Clist => self.clist_view(),
-            ListEditorStyle::Hex => self.hex_view(),
-            ListEditorStyle::Plain => self.plain_view(),
-        }
-    }
-
-    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
-        let mut cur = self.cursor.get();
-        if let Some(idx) = cur.idx {
-            match cur.mode {
-                ListCursorMode::Insert => match event {
-                    TerminalEvent::Input(Event::Key(Key::Backspace)) => {
-                        if idx > 0 && idx <= self.data.len() {
-                            cur.idx = Some(idx - 1);
-                            self.cursor.set(cur);
-                            self.data.remove(idx - 1);
-                            TerminalEditorResult::Continue
-                        } else {
-                            TerminalEditorResult::Exit
-                        }
-                    }
-                    TerminalEvent::Input(Event::Key(Key::Delete)) => {
-                        if idx < self.data.len() {
-                            self.data.remove(idx);
-                            TerminalEditorResult::Continue
-                        } else {
-                            TerminalEditorResult::Exit
-                        }
-                    }
-                    TerminalEvent::Input(Event::Key(Key::Char('\t')))
-                    | TerminalEvent::Input(Event::Key(Key::Insert)) => {
-                        self.set_mode(ListCursorMode::Select);
-                        TerminalEditorResult::Continue
-                    }
-                    _ => {
-                        let new_edit = (self.make_item_editor)();
-                        self.data.insert(idx, new_edit.clone());
-                        self.set_mode(ListCursorMode::Modify);
-                        let mut ne = new_edit.write().unwrap();
-
-                        match ne.handle_terminal_event(event) {
-                            TerminalEditorResult::Exit => {
-                                self.cursor.set(ListCursor {
-                                    mode: ListCursorMode::Insert,
-                                    idx: Some(idx + 1),
-                                });
-                            }
-                            _ => {}
-                        }
-                        TerminalEditorResult::Continue
-                    }
-                },
-                ListCursorMode::Select => match event {
-                    TerminalEvent::Input(Event::Key(Key::Char('\t')))
-                    | TerminalEvent::Input(Event::Key(Key::Insert)) => {
-                        self.set_mode(ListCursorMode::Insert);
-                        TerminalEditorResult::Continue
-                    }
-                    TerminalEvent::Input(Event::Key(Key::Delete)) => {
-                        self.data.remove(idx);
-
-                        if self.data.len() == 0 {
-                            self.cursor.set(ListCursor::default());
-                        } else if idx == self.data.len() {
-                            self.cursor.set(ListCursor {
-                                mode: ListCursorMode::Select,
-                                idx: Some(idx - 1),
-                            });
-                        }
-                        TerminalEditorResult::Continue
-                    }
-                    _ => TerminalEditorResult::Continue,
-                },
-                ListCursorMode::Modify => {
-                    let ce = self.data.get_mut(idx);
-                    let mut cur_edit = ce.write().unwrap();
-
-                    match cur_edit.handle_terminal_event(event) {
-                        TerminalEditorResult::Exit => {
-                            cur_edit.up();
-                            drop(cur_edit);
-                            drop(ce);
-
-                            match event {
-                                TerminalEvent::Input(Event::Key(Key::Backspace)) => {
-                                    // todo: join instead of remove
-                                    self.cursor.set(ListCursor {
-                                        mode: ListCursorMode::Insert,
-                                        idx: Some(idx),
-                                    });
-
-                                    self.data.remove(idx);
-                                }
-                                _ => {
-                                    // todo: split
-
-                                    self.cursor.set(ListCursor {
-                                        mode: ListCursorMode::Insert,
-                                        idx: Some(idx + 1),
-                                    });
-                                }
-                            }
-                        }
-                        TerminalEditorResult::Continue => {}
-                    }
-
-                    TerminalEditorResult::Continue
-                }
-            }
-        } else {
-            TerminalEditorResult::Continue
-        }
-    }
-}
-
-impl<ItemEditor, FnMakeItemEditor> TerminalTreeEditor for ListEditor<ItemEditor, FnMakeItemEditor>
-where
-    ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>> + Send + Sync,
-{}
-
-impl<ItemEditor, FnMakeItemEditor> ListEditor<ItemEditor, FnMakeItemEditor>
-where
-    ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>>,
-{
     pub fn get_seg_seq_view(
         &self,
     ) -> OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>> {
-        let segment_view_port = ViewPort::<dyn SequenceView<Item = ListEditorViewSegment>>::new();
+        let segment_view_port = ViewPort::<dyn SequenceView<Item = ListSegment<ItemEditor>>>::new();
-        ListEditorView::new(
+        ListSegmentSequence::new(
-            self.cursor_port.outer(),
+            self.get_cursor_port(),
-            self.data_port
+            self.get_data_port(),
-                .outer()
-                .to_sequence()
-                .map(|ed| ed.read().unwrap().get_term_view()),
             segment_view_port.inner(),
+            self.depth
         );
-
+        segment_view_port.into_outer().map(move |segment| segment.pty_view())
-        segment_view_port.into_outer().map(move |segment| {
-            let cursor_col = (90, 60, 200);
-            match segment {
-                ListEditorViewSegment::InsertCursor => {
-                    make_label("|").map_item(move |_pt, atom| {
-                        atom.add_style_back(TerminalStyle::fg_color(cursor_col))
-                            .add_style_back(TerminalStyle::bold(true))
-                    })
-                }
-                ListEditorViewSegment::Select(sub_view) => sub_view.map_item(move |_pt, atom| {
-                    let old_col = atom.style.bg_color.unwrap_or(cursor_col);
-                    atom.add_style_front(TerminalStyle::bg_color((
-                        (old_col.0 as f32 * 0.4) as u8,
-                        (old_col.1 as f32 * 0.4) as u8,
-                        (old_col.2 as f32 * 0.4) as u8,
-                    )))
-                }),
-                ListEditorViewSegment::Modify(sub_view) => {
-                    sub_view.clone().map_item(
-                        move |_pt, atom| {
-                            let old_col = atom.style.bg_color.unwrap_or(cursor_col);
-                            atom.add_style_front(TerminalStyle::bg_color((
-                                (old_col.0 as f32 * 0.4) as u8,
-                                (old_col.1 as f32 * 0.4) as u8,
-                                (old_col.2 as f32 * 0.4) as u8,
-                            )))
-                        }, //.add_style_back(TerminalStyle::bold(true))
-                    )
-                }
-                ListEditorViewSegment::View(sub_view) => sub_view.clone(),
-            }
-        })
-    }
-
-    pub fn horizontal_sexpr_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view().horizontal_sexpr_view(1)
-    }
-
-    pub fn vertical_sexpr_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view().vertical_sexpr_view(0)
-    }
-
-    pub fn path_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view()
-            .decorate("<", ">", "/", 0)
-            .to_grid_horizontal()
-            .flatten()
-    }
-
-    pub fn string_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view()
-            .decorate("\"", "\"", "", 1)
-            .to_grid_horizontal()
-            .flatten()
-    }
-
-    pub fn clist_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view()
-            .decorate("{", "}", ", ", 1)
-            .to_grid_horizontal()
-            .flatten()
-    }
-
-    pub fn tuple_view(&self, depth: usize) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view()
-            .decorate("(", ")", ", ", depth)
-            .to_grid_horizontal()
-            .flatten()
-    }
-
-    pub fn hex_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view()
-            .decorate("0x", "", "", 0)
-            .to_grid_horizontal()
-            .flatten()
-    }
-
-    pub fn plain_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.get_seg_seq_view().to_grid_horizontal().flatten()
-    }
-
-    pub fn new(make_item_editor: FnMakeItemEditor, style: ListEditorStyle) -> Self {
-        let cursor_port = ViewPort::new();
-        let data_port = ViewPort::new();
-        let cursor = SingletonBuffer::new(ListCursor::default(), cursor_port.inner());
-        let data = VecBuffer::<Arc<RwLock<ItemEditor>>>::new(data_port.inner());
-
-        let mut le = ListEditor {
-            data,
-            data_port,
-            cursor,
-            cursor_port,
-
-            style,
-            make_item_editor,
-            _level: 0,
-            cur_dist: Arc::new(RwLock::new(0)),
-        };
-        le.set_style(style);
-        le
-    }
-
-    pub fn set_style(&mut self, style: ListEditorStyle) {
-        self.style = style;
     }
 
     pub fn get_data_port(&self) -> OuterViewPort<dyn SequenceView<Item = Arc<RwLock<ItemEditor>>>> {
-        self.data_port.outer().to_sequence()
+        self.data.get_port().to_sequence()
     }
 
-    pub fn get_list_cursor_port(&self) -> OuterViewPort<dyn SingletonView<Item = ListCursor>> {
+    pub fn get_cursor_port(&self) -> OuterViewPort<dyn SingletonView<Item = ListCursor>> {
-        self.cursor_port.outer()
+        self.cursor.get_port()
     }
 
     pub fn get_item(&self) -> Option<Arc<RwLock<ItemEditor>>> {
         if let Some(idx) = self.cursor.get().idx {
+            let idx = crate::modulo(idx as isize, self.data.len() as isize) as usize;
             if idx < self.data.len() {
                 Some(self.data.get(idx))
             } else {
@@ -716,50 +83,5 @@ where
     pub fn clear(&mut self) {
         self.data.clear();
     }
-    
-    fn set_idx(&mut self, idx: isize) {
-        let cur = self.cursor.get();
-        let mode = cur.mode;
-
-        if idx < 0 {
-            self.cursor.set(ListCursor {
-                mode,
-                idx: Some((self.data.len() as isize + idx) as usize),
-            });
-        } else {
-            self.cursor.set(ListCursor {
-                mode,
-                idx: Some(idx as usize),
-            });
-        }
-    }
-
-    fn set_mode(&mut self, mode: ListCursorMode) {
-        let mut cur = self.cursor.get();
-
-        if cur.mode == ListCursorMode::Insert && mode != ListCursorMode::Insert {
-            if let Some(idx) = cur.idx {
-                if idx == self.data.len() && idx > 0 {
-                    cur.idx = Some(idx - 1);
-                }
-            }
-        }
-
-        cur.mode = mode;
-
-        self.cursor.set(cur);
-    }
-}
-
-impl<ItemEditor, FnMakeItemEditor> ListEditor<ItemEditor, FnMakeItemEditor>
-where
-    ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static,
-    FnMakeItemEditor: Fn() -> Arc<RwLock<ItemEditor>>,
-{
-    fn set_leaf_mode(&mut self, mode: ListCursorMode) {
-        let mut c = self.get_cursor();
-        c.leaf_mode = mode;
-        self.goto(c);
-    }
 }
 

nested/src/list/editor_view.rs

@@ -1,122 +0,0 @@
-use {
-    crate::{
-        core::{InnerViewPort, Observer, ObserverBroadcast, ObserverExt, OuterViewPort, View},
-        list::{ListCursor, ListCursorMode},
-        projection::ProjectionHelper,
-        sequence::SequenceView,
-        singleton::SingletonView,
-        terminal::TerminalView,
-    },
-    std::sync::Arc,
-    std::sync::RwLock,
-};
-
-pub enum ListEditorViewSegment {
-    InsertCursor,
-    View(OuterViewPort<dyn TerminalView>),
-    Select(OuterViewPort<dyn TerminalView>),
-    Modify(OuterViewPort<dyn TerminalView>),
-}
-
-pub struct ListEditorView {
-    cursor: Arc<dyn SingletonView<Item = ListCursor>>,
-    data: Arc<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-    cur_cursor: ListCursor,
-
-    cast: Arc<RwLock<ObserverBroadcast<dyn SequenceView<Item = ListEditorViewSegment>>>>,
-    proj_helper: ProjectionHelper<usize, Self>,
-}
-
-impl View for ListEditorView {
-    type Msg = usize;
-}
-
-impl SequenceView for ListEditorView {
-    type Item = ListEditorViewSegment;
-
-    fn len(&self) -> Option<usize> {
-        match self.cursor.get().mode {
-            ListCursorMode::Insert => {
-                Some(self.data.len()? + if self.cur_cursor.idx.is_some() { 1 } else { 0 })
-            }
-            _ => self.data.len(),
-        }
-    }
-
-    fn get(&self, idx: &usize) -> Option<Self::Item> {
-        Some(if let Some(cur) = self.cur_cursor.idx {
-            match self.cur_cursor.mode {
-                ListCursorMode::Select => {
-                    if *idx == cur {
-                        ListEditorViewSegment::Select(self.data.get(&idx)?)
-                    } else {
-                        ListEditorViewSegment::View(self.data.get(&idx)?)
-                    }
-                }
-                ListCursorMode::Insert => {
-                    if *idx < cur {
-                        ListEditorViewSegment::View(self.data.get(&idx)?)
-                    } else if *idx == cur {
-                        ListEditorViewSegment::InsertCursor
-                    } else {
-                        ListEditorViewSegment::View(self.data.get(&(idx - 1))?)
-                    }
-                }
-                ListCursorMode::Modify => {
-                    if *idx == cur {
-                        ListEditorViewSegment::Modify(self.data.get(&idx)?)
-                    } else {
-                        ListEditorViewSegment::View(self.data.get(&idx)?)
-                    }
-                }
-            }
-        } else {
-            ListEditorViewSegment::View(self.data.get(&idx)?)
-        })
-    }
-}
-
-impl ListEditorView {
-    pub fn new(
-        cursor_port: OuterViewPort<dyn SingletonView<Item = ListCursor>>,
-        data_port: OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-        out_port: InnerViewPort<dyn SequenceView<Item = ListEditorViewSegment>>,
-    ) -> Arc<RwLock<Self>> {
-        let mut proj_helper = ProjectionHelper::new(out_port.0.update_hooks.clone());
-        let proj = Arc::new(RwLock::new(ListEditorView {
-            cur_cursor: ListCursor::default(),
-            cursor: proj_helper.new_singleton_arg(0, cursor_port, |s: &mut Self, _msg| {
-                let _old_cursor = s.cur_cursor;
-                let new_cursor = s.cursor.get();
-                s.cur_cursor = new_cursor;
-
-                s.cast.notify_each(0..=s.data.len().unwrap_or(0) + 1);
-            }),
-            data: proj_helper.new_sequence_arg(1, data_port, |s: &mut Self, idx| {
-                if let Some(cur_idx) = s.cur_cursor.idx {
-                    match s.cur_cursor.mode {
-                        ListCursorMode::Insert => {
-                            if *idx < cur_idx {
-                                s.cast.notify(idx);
-                            } else {
-                                s.cast.notify(&(*idx + 1));
-                            }
-                        }
-                        _ => {
-                            s.cast.notify(idx);
-                        }
-                    }
-                } else {
-                    s.cast.notify(idx);
-                }
-            }),
-            cast: out_port.get_broadcast(),
-            proj_helper,
-        }));
-
-        proj.write().unwrap().proj_helper.set_proj(&proj);
-        out_port.set_view(Some(proj.clone()));
-
-        proj
-    }
-}

nested/src/list/mod.rs

@@ -1,8 +1,12 @@
+
 pub mod cursor;
+pub mod segment;
 pub mod editor;
-pub mod editor_view;
+pub mod nav;
-pub mod sexpr;
+pub mod pty_editor;
 
 pub use cursor::{ListCursor, ListCursorMode};
-pub use editor::{ListEditor, ListEditorStyle};
+pub use segment::{ListSegment, ListSegmentSequence};
-pub use sexpr::{ListDecoration, SExprView};
+pub use editor::ListEditor;
+pub use pty_editor::PTYListEditor;
+

nested/src/list/nav.rs

@@ -0,0 +1,240 @@
+use {
+    crate::{
+        core::{OuterViewPort, ViewPort},
+        list::{
+            ListCursor, ListCursorMode,
+            ListSegment, ListSegmentSequence,
+            ListEditor
+        },
+        sequence::SequenceView,
+        singleton::{SingletonBuffer, SingletonView},
+        terminal::{
+            make_label, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle,
+            TerminalView,
+        },
+        tree_nav::{TerminalTreeEditor, TreeCursor, TreeNav, TreeNavResult},
+        vec::VecBuffer,
+        color::{bg_style_from_depth, fg_style_from_depth}
+    },
+    std::sync::{Arc, RwLock},
+    termion::event::{Event, Key},
+    cgmath::Vector2
+};
+
+impl<ItemEditor> TreeNav for ListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    fn get_cursor_warp(&self) -> TreeCursor {
+        let cur = self.cursor.get();
+        match cur.mode {
+            ListCursorMode::Insert => TreeCursor {
+                leaf_mode: cur.mode,
+                tree_addr: if let Some(i) = cur.idx {
+                    vec![
+                        i - self.data.len() as isize - 1
+                    ]
+                } else {
+                    vec![]
+                },
+            },
+            ListCursorMode::Select => {
+                if let Some(i) = cur.idx {
+                    if i < self.data.len() as isize {
+                        let mut sub_cur = self.data.get(i as usize).read().unwrap().get_cursor_warp();
+                        sub_cur.tree_addr.insert(0, i as isize - self.data.len() as isize);
+                        return sub_cur;
+                    }
+                }
+                TreeCursor {
+                    leaf_mode: cur.mode,
+                    tree_addr: vec![],
+                }
+            }
+        }
+    }
+
+    fn get_cursor(&self) -> TreeCursor {
+        let cur = self.cursor.get();
+        match cur.mode {
+            ListCursorMode::Insert => TreeCursor {
+                leaf_mode: cur.mode,
+                tree_addr: if let Some(i) = cur.idx {
+                    vec![i]
+                } else {
+                    vec![]
+                },
+            },
+            ListCursorMode::Select => {
+                if let Some(i) = cur.idx {
+                    if i < self.data.len() as isize {
+                        let mut sub_cur = self.data.get(i as usize).read().unwrap().get_cursor();
+                        sub_cur.tree_addr.insert(0, i as isize);
+                        return sub_cur;
+                    }
+                }
+                TreeCursor {
+                    leaf_mode: cur.mode,
+                    tree_addr: vec![],
+                }
+            }
+        }
+    }
+
+    fn goto(&mut self, new_cur: TreeCursor) -> TreeNavResult {
+        let old_cur = self.cursor.get();
+        if let Some(i) = old_cur.idx {
+            if i < self.data.len() as isize {
+                let ce = self.data.get_mut(i as usize);
+                let mut cur_edit = ce.write().unwrap();
+                cur_edit.goto(TreeCursor::none());
+            }
+        }
+
+        match new_cur.tree_addr.len() {
+            0 => {
+                self.cursor.set(ListCursor {
+                    mode: new_cur.leaf_mode,
+                    idx: None,
+                });
+                TreeNavResult::Continue
+            }
+            1 => {
+                self.cursor.set(ListCursor {
+                    mode: new_cur.leaf_mode,
+                    idx: Some(crate::modulo(new_cur.tree_addr[0], if new_cur.leaf_mode == ListCursorMode::Insert { 1 } else { 0 } + self.data.len() as isize)),
+                });
+                TreeNavResult::Continue
+            }
+            _ => {
+                let idx = crate::modulo(new_cur.tree_addr[0], self.data.len() as isize);
+
+                self.cursor.set(ListCursor {
+                    mode: ListCursorMode::Select,
+                    idx: Some(idx),
+                });
+
+                let item = self.data.get_mut(idx as usize);
+                let mut item_edit = item.write().unwrap();
+
+                item_edit.goto(TreeCursor {
+                    leaf_mode: new_cur.leaf_mode,
+                    tree_addr: new_cur.tree_addr[1..].iter().cloned().collect(),
+                });
+
+                TreeNavResult::Continue                
+            }
+        }
+    }
+
+    fn goby(&mut self, direction: Vector2<isize>) -> TreeNavResult {
+        let mut cur = self.get_cursor();
+        match cur.tree_addr.len() {
+            0 => {
+
+                if direction.y < 0 {
+                    // up
+                    TreeNavResult::Exit
+                } else if direction.y > 0 {
+                    // dn
+                    self.cursor.set(ListCursor::home());
+                    self.goby(Vector2::new(direction.x, direction.y-1));
+                    TreeNavResult::Continue
+                } else {
+                    TreeNavResult::Continue
+                }
+            },
+
+            1 => {
+                if direction.y > 0 {
+                    // dn
+                    if cur.tree_addr[0] < self.data.len() as isize {
+                        let item = self.data.get_mut(cur.tree_addr[0] as usize);
+                        let mut item_edit = item.write().unwrap();
+
+                        if item_edit.goby(Vector2::new(direction.x, direction.y)) == TreeNavResult::Continue {
+                            self.cursor.set(ListCursor {
+                                mode: ListCursorMode::Select,
+                                idx: Some(cur.tree_addr[0])
+                            })
+                        }
+                    }
+
+                    TreeNavResult::Continue
+
+                } else if direction.y < 0 {
+                    // up
+
+                    self.cursor.set(ListCursor::none());
+                    TreeNavResult::Exit                    
+                } else {
+                    // horizontal
+
+                    if (cur.tree_addr[0]+direction.x >= 0) &&
+                        (cur.tree_addr[0]+direction.x <
+                         self.data.len() as isize
+                         + if cur.leaf_mode == ListCursorMode::Insert { 1 } else { 0 })
+                    {
+                        self.cursor.set(ListCursor {
+                            mode: cur.leaf_mode,
+                            idx: Some(cur.tree_addr[0] + direction.x)
+                        });
+                        TreeNavResult::Continue
+                    } else {
+                        self.cursor.set(ListCursor::none());
+                        TreeNavResult::Exit
+                    }
+                }
+            },
+            depth => {
+                // nested
+
+                let item = self.data.get_mut(cur.tree_addr[0] as usize);
+                let mut item_edit = item.write().unwrap();
+
+                match item_edit.goby(direction) {
+                    TreeNavResult::Exit => {
+                        if direction.y < 0 {
+                            // up
+                            self.cursor.set(ListCursor {
+                                mode: cur.leaf_mode,
+                                idx: Some(cur.tree_addr[0])
+                            });
+
+                            TreeNavResult::Continue
+                        } else if direction.y > 0 {
+                            // dn
+
+                            TreeNavResult::Continue
+                        } else {
+                            // horizontal
+                            drop(item_edit);
+
+                            if (cur.tree_addr[0]+direction.x >= 0) &&
+                                (cur.tree_addr[0]+direction.x < self.data.len() as isize)
+                            {
+                                if direction.x < 0 {
+                                    cur.tree_addr[0] -= 1;
+                                    for i in 1..depth {
+                                        cur.tree_addr[i] = -1;
+                                    }
+                                } else {
+                                    cur.tree_addr[0] += 1;
+                                    for i in 1..depth {
+                                        cur.tree_addr[i] = 0;
+                                    }
+                                }
+
+                                self.goto(cur)                                
+                            } else {
+                                self.cursor.set(ListCursor::none());
+                                TreeNavResult::Exit
+                            }
+                        }
+                    }
+                    TreeNavResult::Continue => TreeNavResult::Continue
+                }                
+            }
+        }
+    }
+}
+

nested/src/list/pty_editor.rs

@@ -0,0 +1,208 @@
+use {
+    crate::{
+        core::{OuterViewPort, ViewPort},
+        list::{
+            ListCursor, ListCursorMode,
+            ListSegment, ListSegmentSequence,
+            ListEditor
+        },
+        sequence::{SequenceView, decorator::{SeqDecorStyle, PTYSeqDecorate}},
+        singleton::{SingletonBuffer, SingletonView},
+        terminal::{
+            make_label, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle,
+            TerminalView,
+        },
+        tree_nav::{TerminalTreeEditor, TreeCursor, TreeNav, TreeNavResult},
+        vec::VecBuffer,
+        color::{bg_style_from_depth, fg_style_from_depth}
+    },
+    std::sync::{Arc, RwLock},
+    termion::event::{Event, Key},
+    cgmath::Vector2
+};
+
+pub struct PTYListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    pub editor: ListEditor<ItemEditor>,
+
+    style: SeqDecorStyle,
+    depth: usize,
+
+    port: ViewPort<dyn TerminalView>
+}
+
+impl<ItemEditor> PTYListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    pub fn new(
+        make_item_editor: Box<dyn Fn() -> Arc<RwLock<ItemEditor>> + Send + Sync>,
+        style: SeqDecorStyle,
+        depth: usize
+    ) -> Self {
+        let port = ViewPort::new();
+        PTYListEditor {
+            editor: ListEditor::new(make_item_editor, depth),
+            style,
+            depth,
+            port
+        }
+    }
+
+    pub fn get_data_port(&self) -> OuterViewPort<dyn SequenceView<Item = Arc<RwLock<ItemEditor>>>> {
+        self.editor.get_data_port()
+    }
+    
+    pub fn clear(&mut self) {
+        self.editor.clear();
+    }
+    
+    pub fn get_item(&self) -> Option<Arc<RwLock<ItemEditor>>> {
+        self.editor.get_item()
+    }
+    
+    pub fn set_depth(&mut self, depth: usize) {
+        self.depth = depth;
+    }
+
+    pub fn set_style(&mut self, style: SeqDecorStyle) {
+        self.style = style;
+    }
+}
+
+impl<ItemEditor> TerminalEditor for PTYListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
+        self.editor
+            .get_seg_seq_view()
+            .pty_decorate(self.style, self.depth)
+    }
+
+    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
+        let mut cur = self.editor.cursor.get();
+        if let Some(idx) = cur.idx {
+            match cur.mode {
+                ListCursorMode::Insert => match event {
+                    TerminalEvent::Input(Event::Key(Key::Backspace)) => {
+                        if idx > 0 && idx <= self.editor.data.len() as isize {
+                            cur.idx = Some(idx as isize - 1);
+                            self.editor.cursor.set(cur);
+                            self.editor.data.remove(idx as usize - 1);
+
+                            if self.editor.data.len() > 0 {
+                                TerminalEditorResult::Continue
+                            } else {
+                                TerminalEditorResult::Exit
+                            }
+                        } else {
+                            TerminalEditorResult::Exit
+                        }
+                    }
+                    TerminalEvent::Input(Event::Key(Key::Delete)) => {
+                        if idx < self.editor.data.len() as isize {
+                            self.editor.data.remove(idx as usize);
+                            TerminalEditorResult::Continue
+                        } else {
+                            TerminalEditorResult::Exit
+                        }
+                    }
+                    TerminalEvent::Input(Event::Key(Key::Char('\t')))
+                    | TerminalEvent::Input(Event::Key(Key::Insert)) => {
+                        self.editor.set_leaf_mode(ListCursorMode::Select);
+                        TerminalEditorResult::Continue
+                    }
+                    TerminalEvent::Input(Event::Key(Key::Char('\n'))) => {
+                        self.editor.goto(TreeCursor::none());
+                        TerminalEditorResult::Exit
+                    }
+                    _ => {
+                        let new_edit = (self.editor.make_item_editor)();
+                        self.editor.data.insert(idx as usize, new_edit.clone());
+                        self.editor.set_leaf_mode(ListCursorMode::Select);
+
+                        let mut ne = new_edit.write().unwrap();
+                        ne.goto(TreeCursor::home());
+
+                        match ne.handle_terminal_event(event) {
+                            TerminalEditorResult::Exit => {
+                                self.editor.cursor.set(ListCursor {
+                                    mode: ListCursorMode::Insert,
+                                    idx: Some(idx as isize + 1),
+                                });
+                            }
+                            _ => {}
+                        }
+                        TerminalEditorResult::Continue
+                    }
+                },
+                ListCursorMode::Select => {
+                    match event {
+                        TerminalEvent::Input(Event::Key(Key::Char('\t')))
+                            | TerminalEvent::Input(Event::Key(Key::Insert)) => {
+                                self.editor.set_leaf_mode(ListCursorMode::Insert);
+                                TerminalEditorResult::Continue
+                            }
+                        ev => {
+                            if let Some(e) = self.editor.get_item() {
+                                match e.write().unwrap().handle_terminal_event(ev) {
+                                    TerminalEditorResult::Exit => {
+
+                                        match ev {
+                                            TerminalEvent::Input(Event::Key(Key::Backspace)) => {
+                                                self.editor.data.remove(idx as usize);
+                                                self.editor.cursor.set(ListCursor {
+                                                    mode: ListCursorMode::Insert,
+                                                    idx: Some(idx as isize),
+                                                });                             
+                                            }
+                                            _ => {
+                                                self.editor.cursor.set(ListCursor {
+                                                    mode: ListCursorMode::Insert,
+                                                    idx: Some(idx as isize + 1),
+                                                });                                                
+                                            }
+                                        }
+                                    }
+                                    TerminalEditorResult::Continue => {
+                                        
+                                    }
+                                }
+                            }
+
+                            TerminalEditorResult::Continue
+                        }
+                    }
+                }
+            }
+        } else {
+            TerminalEditorResult::Continue
+        }
+    }
+}
+
+impl<ItemEditor> TreeNav for PTYListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    fn get_cursor_warp(&self) -> TreeCursor {
+        self.editor.get_cursor_warp()
+    }
+
+    fn get_cursor(&self) -> TreeCursor {
+        self.editor.get_cursor()
+    }
+
+    fn goby(&mut self, direction: Vector2<isize>) -> TreeNavResult {
+        self.editor.goby(direction)
+    }
+
+    fn goto(&mut self, cursor: TreeCursor) -> TreeNavResult {
+        self.editor.goto(cursor)
+    }
+}
+
+
+impl<ItemEditor> TerminalTreeEditor for PTYListEditor<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{}
+

nested/src/list/segment.rs

@@ -0,0 +1,176 @@
+use {
+    crate::{
+        core::{InnerViewPort, Observer, ObserverBroadcast, ObserverExt, OuterViewPort, View},
+        list::{ListCursor, ListCursorMode},
+        projection::ProjectionHelper,
+        sequence::SequenceView,
+        singleton::SingletonView,
+        terminal::{TerminalView, TerminalStyle, make_label},
+        tree_nav::TerminalTreeEditor,
+        color::{bg_style_from_depth, fg_style_from_depth}
+    },
+    std::sync::Arc,
+    std::sync::RwLock,
+};
+
+pub enum ListSegment<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    InsertCursor,
+    Item {
+        editor: Arc<RwLock<ItemEditor>>,
+        depth: usize,
+        cur_dist: isize,
+    }
+}
+
+pub trait PTYSegment {
+    fn pty_view(&self) -> OuterViewPort<dyn TerminalView>;
+}
+
+impl<ItemEditor> PTYSegment for ListSegment<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    fn pty_view(&self) -> OuterViewPort<dyn TerminalView> {
+        match self {
+            ListSegment::InsertCursor => {
+                make_label("|")
+                    .map_item(move |_pt, atom| {
+                    atom.add_style_back(bg_style_from_depth(0))
+                        .add_style_back(TerminalStyle::bold(true))
+                    })
+            }
+            ListSegment::Item{ editor, depth, cur_dist } => {
+                let e = editor.clone();
+                let d = *depth;
+                editor.read().unwrap().get_term_view().map_item(move |_pt, atom| {
+                    let cur_depth = e.read().unwrap().get_cursor().tree_addr.len();
+                    atom.add_style_back(bg_style_from_depth(cur_depth))
+                        .add_style_back(fg_style_from_depth(d+cur_depth))
+                })
+            }
+        }
+    }
+}
+
+pub struct ListSegmentSequence<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    data: Arc<dyn SequenceView<Item = Arc<RwLock<ItemEditor>>>>,
+    cursor: Arc<dyn SingletonView<Item = ListCursor>>,
+
+    depth: usize,
+    cur_cursor: ListCursor,
+
+    cast: Arc<RwLock<ObserverBroadcast<dyn SequenceView<Item = ListSegment<ItemEditor>>>>>,
+    proj_helper: ProjectionHelper<usize, Self>,
+}
+
+impl<ItemEditor> View for ListSegmentSequence<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    type Msg = usize;
+}
+
+impl<ItemEditor> SequenceView for ListSegmentSequence<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    type Item = ListSegment<ItemEditor>;
+
+    fn len(&self) -> Option<usize> {
+        match self.cur_cursor.mode {
+            ListCursorMode::Insert => {
+                Some(self.data.len()? + if self.cur_cursor.idx.is_some() { 1 } else { 0 })
+            }
+            _ => self.data.len(),
+        }
+    }
+
+    fn get(&self, idx: &usize) -> Option<Self::Item> {
+        let c = self.cursor.get();
+        Some(if let Some(mut cur) = c.idx {
+            match c.mode {
+                ListCursorMode::Select => {
+                    ListSegment::Item {
+                        editor: self.data.get(idx)?,
+                        depth: self.depth,
+                        cur_dist: cur - *idx as isize
+                    }
+                }
+                ListCursorMode::Insert => {
+                    if *idx < cur as usize {
+                        ListSegment::Item {
+                            editor: self.data.get(idx)?,
+                            depth: self.depth,
+                            cur_dist: cur - *idx as isize
+                        }
+                    } else if *idx == cur as usize {
+                        ListSegment::InsertCursor
+                    } else {
+                        ListSegment::Item {
+                            editor: self.data.get(&(*idx - 1))?,
+                            depth: self.depth,
+                            cur_dist: cur - (*idx as isize - 1)
+                        }
+                    }
+                }
+            }
+        } else {
+            ListSegment::Item {
+                editor: self.data.get(&idx)?,
+                depth: self.depth,
+                cur_dist: *idx as isize + 1
+            }
+        })
+    }
+}
+
+impl<ItemEditor> ListSegmentSequence<ItemEditor>
+where ItemEditor: TerminalTreeEditor + ?Sized + Send + Sync + 'static
+{
+    pub fn new(
+        cursor_port: OuterViewPort<dyn SingletonView<Item = ListCursor>>,
+        data_port: OuterViewPort<dyn SequenceView<Item = Arc<RwLock<ItemEditor>>>>,
+        out_port: InnerViewPort<dyn SequenceView<Item = ListSegment<ItemEditor>>>,
+        depth: usize
+    ) -> Arc<RwLock<Self>> {
+        let mut proj_helper = ProjectionHelper::new(out_port.0.update_hooks.clone());
+        let proj = Arc::new(RwLock::new(ListSegmentSequence {
+            cur_cursor: cursor_port.get_view().get(),
+            depth,
+            cursor: proj_helper.new_singleton_arg(0, cursor_port, |s: &mut Self, _msg| {
+                let _old_cursor = s.cur_cursor;
+                s.cur_cursor = s.cursor.get();
+
+                // todo: optimize
+                s.cast.notify_each(0..=s.data.len().unwrap_or(0) + 1);
+            }),
+
+            data: proj_helper.new_sequence_arg(1, data_port, |s: &mut Self, idx| {
+                if let Some(mut cur_idx) = s.cur_cursor.idx {
+                    match s.cur_cursor.mode {
+                        ListCursorMode::Insert => {
+                            if *idx < cur_idx as usize {
+                                s.cast.notify(idx);
+                            } else {
+                                s.cast.notify(&(*idx + 1));
+                            }
+                        }
+                        _ => {
+                            s.cast.notify(idx);
+                        }
+                    }
+                } else {
+                    s.cast.notify(idx);
+                }
+            }),
+            cast: out_port.get_broadcast(),
+            proj_helper,
+        }));
+
+        proj.write().unwrap().proj_helper.set_proj(&proj);
+        out_port.set_view(Some(proj.clone()));
+
+        proj
+    }
+}

nested/src/list/sexpr.rs

@@ -1,270 +0,0 @@
-use {
-    crate::{
-        core::{InnerViewPort, Observer, ObserverBroadcast, OuterViewPort, View, ViewPort},
-        index::IndexArea,
-        projection::ProjectionHelper,
-        sequence::SequenceView,
-        terminal::{make_label, TerminalStyle, TerminalView},
-    },
-    cgmath::Point2,
-    std::sync::Arc,
-    std::sync::RwLock,
-};
-
-//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
-
-pub struct ListDecorator {
-    opening_port: OuterViewPort<dyn TerminalView>,
-    closing_port: OuterViewPort<dyn TerminalView>,
-    delim_port: OuterViewPort<dyn TerminalView>,
-    items: Arc<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-
-    list_style: TerminalStyle,
-    item_style: TerminalStyle,
-
-    cast: Arc<RwLock<ObserverBroadcast<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>>>,
-    proj_helper: ProjectionHelper<(), Self>,
-}
-
-impl View for ListDecorator {
-    type Msg = usize;
-}
-
-impl SequenceView for ListDecorator {
-    type Item = OuterViewPort<dyn TerminalView>;
-
-    fn len(&self) -> Option<usize> {
-        let l = self.items.len()?;
-        Some(if l == 0 { 2 } else { 2 * l + 1 })
-    }
-
-    fn get(&self, idx: &usize) -> Option<Self::Item> {
-        let item_idx = idx / 2;
-        let list_style = self.list_style.clone();
-        let item_style = self.item_style.clone();
-        let l = self.items.len().unwrap_or(0);
-        Some(if *idx == 0 {
-            self.opening_port
-                .clone()
-                .map_item(move |_, atom| atom.add_style_back(list_style))
-        } else if (l == 0 && *idx == 1) || *idx == 2 * l {
-            self.closing_port
-                .clone()
-                .map_item(move |_, atom| atom.add_style_back(list_style))
-        } else if idx % 2 == 0 {
-            self.delim_port
-                .clone()
-                .map_item(move |_, atom| atom.add_style_back(list_style))
-        } else {
-            self.items
-                .get(&item_idx)?
-                .map_item(move |_, atom| atom.add_style_back(item_style))
-        })
-    }
-}
-
-impl ListDecorator {
-    pub fn new(
-        opening: &str,
-        closing: &str,
-        delim: &str,
-        level: usize,
-        items_port: OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-        out_port: InnerViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-    ) -> Arc<RwLock<Self>> {
-        let mut proj_helper = ProjectionHelper::new(out_port.0.update_hooks.clone());
-
-        let li = Arc::new(RwLock::new(ListDecorator {
-            opening_port: make_label(opening),
-            closing_port: make_label(closing),
-            delim_port: make_label(delim),
-            items: proj_helper.new_sequence_arg((), items_port, |s: &mut Self, item_idx| {
-                s.cast.notify(&(*item_idx * 2 + 1));
-                s.cast.notify(&(*item_idx * 2 + 2));
-            }),
-            list_style: TerminalStyle::fg_color(match level {
-                0 => (200, 120, 10),
-                1 => (120, 200, 10),
-                _ => (255, 255, 255),
-            }),
-            item_style: TerminalStyle::fg_color(match level {
-                _ => (255, 255, 255),
-            }),
-            cast: out_port.get_broadcast(),
-            proj_helper,
-        }));
-
-        li.write().unwrap().proj_helper.set_proj(&li);
-
-        out_port.set_view(Some(li.clone()));
-        li
-    }
-}
-
-pub trait ListDecoration {
-    fn decorate(
-        &self,
-        opening: &str,
-        closing: &str,
-        delim: &str,
-        level: usize,
-    ) -> OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>;
-}
-
-impl ListDecoration for OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>> {
-    fn decorate(
-        &self,
-        opening: &str,
-        closing: &str,
-        delim: &str,
-        level: usize,
-    ) -> OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>> {
-        let port = ViewPort::new();
-        ListDecorator::new(opening, closing, delim, level, self.clone(), port.inner());
-        port.into_outer()
-    }
-}
-
-//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
-
-use crate::{grid::GridView, index::IndexView};
-
-pub struct VerticalSexprDecorator {
-    opening_port: OuterViewPort<dyn TerminalView>,
-    closing_port: OuterViewPort<dyn TerminalView>,
-    items: Arc<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-
-    list_style: TerminalStyle,
-    item_style: TerminalStyle,
-
-    cast: Arc<RwLock<ObserverBroadcast<dyn GridView<Item = OuterViewPort<dyn TerminalView>>>>>,
-    proj_helper: ProjectionHelper<(), Self>,
-}
-
-impl View for VerticalSexprDecorator {
-    type Msg = IndexArea<Point2<i16>>;
-}
-
-impl IndexView<Point2<i16>> for VerticalSexprDecorator {
-    type Item = OuterViewPort<dyn TerminalView>;
-
-    fn area(&self) -> IndexArea<Point2<i16>> {
-        IndexArea::Range(
-            Point2::new(0, 0)
-                ..=Point2::new(2, std::cmp::max(self.items.len().unwrap() as i16 - 1, 0)),
-        )
-    }
-
-    fn get(&self, pt: &Point2<i16>) -> Option<Self::Item> {
-        if pt.y < 0 {
-            return None;
-        }
-        let item_idx = pt.y as usize;
-        let list_style = self.list_style.clone();
-        let item_style = self.item_style.clone();
-        let l = self.items.len().unwrap_or(0);
-
-        match pt.x {
-            0 => {
-                if pt.y == 0 {
-                    Some(
-                        self.opening_port
-                            .clone()
-                            .map_item(move |_, atom| atom.add_style_back(list_style)),
-                    )
-                } else {
-                    None
-                }
-            }
-            1 => {
-                if item_idx < l {
-                    Some(
-                        self.items
-                            .get(&item_idx)?
-                            .map_item(move |_, atom| atom.add_style_back(item_style)),
-                    )
-                } else {
-                    None
-                }
-            }
-            2 => {
-                if (l == 0 && pt.y == 0) || (item_idx + 1 == l) {
-                    Some(
-                        self.closing_port
-                            .clone()
-                            .map_item(move |_, atom| atom.add_style_back(list_style)),
-                    )
-                } else {
-                    None
-                }
-            }
-            _ => None,
-        }
-    }
-}
-
-impl VerticalSexprDecorator {
-    pub fn new(
-        opening: &str,
-        closing: &str,
-        level: usize,
-        items_port: OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>>,
-        out_port: InnerViewPort<dyn GridView<Item = OuterViewPort<dyn TerminalView>>>,
-    ) -> Arc<RwLock<Self>> {
-        let mut proj_helper = ProjectionHelper::new(out_port.0.update_hooks.clone());
-
-        let li = Arc::new(RwLock::new(VerticalSexprDecorator {
-            opening_port: make_label(opening),
-            closing_port: make_label(closing),
-            items: proj_helper.new_sequence_arg((), items_port, |s: &mut Self, item_idx| {
-                s.cast.notify(&IndexArea::Range(
-                    Point2::new(0, *item_idx as i16)..=Point2::new(2, *item_idx as i16),
-                ));
-            }),
-            list_style: TerminalStyle::fg_color(match level {
-                0 => (200, 120, 10),
-                1 => (120, 200, 10),
-                2 => (200, 10, 120),
-                _ => (255, 255, 255),
-            }),
-            item_style: TerminalStyle::fg_color(match level {
-                _ => (255, 255, 255),
-            }),
-            cast: out_port.get_broadcast(),
-            proj_helper,
-        }));
-
-        li.write().unwrap().proj_helper.set_proj(&li);
-
-        out_port.set_view(Some(li.clone()));
-        li
-    }
-}
-
-pub trait SExprView {
-    fn horizontal_sexpr_view(&self, level: usize) -> OuterViewPort<dyn TerminalView>;
-    fn vertical_bar_view(&self, level: usize) -> OuterViewPort<dyn TerminalView>;
-    fn vertical_sexpr_view(&self, level: usize) -> OuterViewPort<dyn TerminalView>;
-}
-
-impl SExprView for OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn TerminalView>>> {
-    fn horizontal_sexpr_view(&self, level: usize) -> OuterViewPort<dyn TerminalView> {
-        let port = ViewPort::new();
-        ListDecorator::new("(", ")", " ", level, self.clone(), port.inner());
-
-        port.into_outer().to_grid_horizontal().flatten()
-    }
-
-    fn vertical_bar_view(&self, level: usize) -> OuterViewPort<dyn TerminalView> {
-        let port = ViewPort::new();
-        ListDecorator::new("Λ", "V", "|", level, self.clone(), port.inner());
-
-        port.into_outer().to_grid_vertical().flatten()
-    }
-
-    fn vertical_sexpr_view(&self, level: usize) -> OuterViewPort<dyn TerminalView> {
-        let port = ViewPort::new();
-        VerticalSexprDecorator::new("(", ")", level, self.clone(), port.inner());
-        port.into_outer().flatten()
-    }
-}

nested/src/make_editor.rs

@@ -1,24 +1,17 @@
 
 use {
     crate::{
-        core::{ViewPort, OuterViewPort, Observer, port::UpdateTask, TypeTerm, TypeLadder, Context},
+        core::{TypeLadder, Context},
-        terminal::{
+        terminal::{TerminalView},
-            Terminal, TerminalAtom, TerminalCompositor, TerminalEditor,
+        tree_nav::{TerminalTreeEditor},
-            TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
-            make_label
-        },
-        sequence::{SequenceView},
-        tree_nav::{TreeNav, TerminalTreeEditor, TreeCursor, TreeNavResult},
-        vec::{VecBuffer, MutableVecAccess},
-        index::buffer::IndexBuffer,
         integer::PosIntEditor,
-        string_editor::{StringEditor, CharEditor},
+        list::{ListEditor, PTYListEditor},
-        list::{ListEditor, ListCursorMode, ListEditorStyle},
+        sequence::{decorator::{SeqDecorStyle}},
-        product::editor::ProductEditor
+        product::editor::ProductEditor,
+        char_editor::CharEditor
     },
-    cgmath::{Point2, Vector2},
+    cgmath::Vector2,
-    std::{sync::{Arc, RwLock}, ops::{Deref, DerefMut}},
+    std::sync::{Arc, RwLock},
-    termion::event::{Event, Key},
 };
 
 pub fn make_editor(ctx: Arc<RwLock<Context>>, t: &TypeLadder, depth: usize) -> Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>> {
@@ -30,44 +23,70 @@ pub fn make_editor(ctx: Arc<RwLock<Context>>, t: &TypeLadder, depth: usize) -> A
         Arc::new(RwLock::new(PosIntEditor::new(10))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( String )").unwrap() {
-        Arc::new(RwLock::new(StringEditor::new())) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
+        Arc::new(RwLock::new(
+            PTYListEditor::new(
+                Box::new(|| {
+                    Arc::new(RwLock::new(CharEditor::new()))
+                }),
+                SeqDecorStyle::DoubleQuote,
+                depth
+            )
+        ))
 
     } else if t[0] == c.type_term_from_str("( List Char )").unwrap() {
-        Arc::new(RwLock::new(ListEditor::new(
+        Arc::new(RwLock::new(
-            || { Arc::new(RwLock::new(CharEditor::new())) },
+            PTYListEditor::new(
-            ListEditorStyle::Plain
+                Box::new(
-        ))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
+                    || { Arc::new(RwLock::new(CharEditor::new())) }
+                ),
+                SeqDecorStyle::Plain,
+                depth
+            )
+        )) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( List ℕ )").unwrap() {
-        Arc::new(RwLock::new(ListEditor::new(
+        Arc::new(RwLock::new(
-            || {
+            PTYListEditor::new(
+                Box::new(|| {
                     Arc::new(RwLock::new(PosIntEditor::new(16)))
-            },
+                }),
-            ListEditorStyle::HorizontalSexpr
+                SeqDecorStyle::EnumSet,
-        ))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
+                depth
+            )
+        )) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( Path )").unwrap() {
-        Arc::new(RwLock::new(ListEditor::new(
+        let d = depth + 1;
-            || {
+        Arc::new(RwLock::new(PTYListEditor::new(
-                Arc::new(RwLock::new(ListEditor::new(
+            Box::new({
-                    || {
+                let d= depth +1;
+                move || {
+                    Arc::new(RwLock::new(PTYListEditor::new(
+                        Box::new(|| {
                             Arc::new(RwLock::new(CharEditor::new()))
-                    },
+                        }),
-                    ListEditorStyle::Plain
+                        SeqDecorStyle::Plain,
+                        d
                     )))
-            },
+            }}),
-            ListEditorStyle::Path
+            SeqDecorStyle::Path,
+            depth
         ))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( List RGB )").unwrap() {
-        Arc::new(RwLock::new(ListEditor::new({
+        Arc::new(RwLock::new(
+            PTYListEditor::<dyn TerminalTreeEditor + Send +Sync>::new(
+                Box::new({
+                    let d = depth+1;
                     let ctx = ctx.clone();
                     move || {
-                make_editor(ctx.clone(), &vec![ ctx.read().unwrap().type_term_from_str("( RGB )").unwrap() ], depth+1)
+                        make_editor(ctx.clone(), &vec![ ctx.read().unwrap().type_term_from_str("( RGB )").unwrap() ], d)
                     }
-        },
+                }),
-            ListEditorStyle::VerticalSexpr
+                SeqDecorStyle::VerticalSexpr,
-        ))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
+                depth
+            )
+        )) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( RGB )").unwrap() {
         Arc::new(RwLock::new(ProductEditor::new(depth, ctx.clone())
@@ -92,14 +111,18 @@ pub fn make_editor(ctx: Arc<RwLock<Context>>, t: &TypeLadder, depth: usize) -> A
         )) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else if t[0] == c.type_term_from_str("( List Term )").unwrap() {
-        Arc::new(RwLock::new(ListEditor::new({
+        Arc::new(RwLock::new(
+            PTYListEditor::<dyn TerminalTreeEditor + 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)
                     }
-        },
+                }),
-            ListEditorStyle::Tuple(depth)
+                SeqDecorStyle::Tuple,
-        ))) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
+                depth
+            )
+        )) as Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>
 
     } else { // else: term
         Arc::new(RwLock::new(

nested/src/modulo.rs

@@ -0,0 +1,10 @@
+
+pub fn modulo(a: isize, b: isize) -> isize {
+    if b > 0 {
+        ((a % b) + b) % b
+    } else {
+        0
+    }
+}
+
+

nested/src/product/editor.rs

@@ -1,24 +1,19 @@
-
 use {
     crate::{
-        core::{ViewPort, OuterViewPort, Observer, port::UpdateTask, TypeTerm, TypeLadder, Context},
+        core::{ViewPort, OuterViewPort, TypeLadder, Context},
         terminal::{
-            Terminal, TerminalAtom, TerminalCompositor, TerminalEditor,
+            TerminalEditor, TerminalEditorResult,
-            TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
+            TerminalEvent, TerminalView
-            make_label
         },
         sequence::{SequenceView},
-        tree_nav::{TreeNav, TerminalTreeEditor, TreeCursor, TreeNavResult},
+        tree_nav::{TreeNav, TerminalTreeEditor, TreeNavResult},
         vec::{VecBuffer, MutableVecAccess},
-        index::buffer::IndexBuffer,
+        list::ListCursorMode,
-        integer::PosIntEditor,
-        string_editor::{StringEditor, CharEditor},
-        list::{ListEditor, ListCursorMode, ListEditorStyle},
         product::{element::ProductEditorElement},
         make_editor::make_editor
     },
-    cgmath::{Point2, Vector2},
+    cgmath::Vector2,
-    std::{sync::{Arc, RwLock}, ops::{Deref, DerefMut}},
+    std::sync::{Arc, RwLock},
     termion::event::{Event, Key},
 };
 
@@ -31,8 +26,8 @@ pub struct ProductEditor {
 
     pub(super) ctx: Arc<RwLock<Context>>,
     
-    pub(super) cursor: Option<usize>,
+    pub(super) cursor: Option<isize>,
-    pub(super) depth: usize
+    pub(super) depth: usize,
 }
 
 impl ProductEditor {
@@ -46,7 +41,7 @@ impl ProductEditor {
         });
 
         ProductEditor {
-            elements: VecBuffer::new(port.inner()),
+            elements: VecBuffer::with_port(port.inner()),
             el_port,
             el_view_port,
             n_indices: Vec::new(),
@@ -59,7 +54,7 @@ impl ProductEditor {
     }
     
     pub fn with_t(mut self, t: &str) -> Self {
-        self.elements.push(ProductEditorElement::T(t.to_string()));
+        self.elements.push(ProductEditorElement::T(t.to_string(), self.depth));
         self
     }
 
@@ -68,22 +63,24 @@ impl ProductEditor {
         self.elements.push(ProductEditorElement::N{
             t: n,
             editor: None,
-            select: false
+            cur_depth: 0
         });
         self.n_indices.push(elem_idx);
         self
     }
 
-    pub fn get_editor_element(&self, idx: usize) -> Option<ProductEditorElement> {
+    pub fn get_editor_element(&self, mut idx: isize) -> Option<ProductEditorElement> {
-        if let Some(i) = self.n_indices.get(idx) {
+        idx = crate::modulo(idx, self.n_indices.len() as isize);
+        if let Some(i) = self.n_indices.get(idx as usize) {
             Some(self.elements.get(*i))
         } else {
             None
         }
     }
 
-    pub fn get_editor_element_mut(&mut self, idx: usize) -> Option<MutableVecAccess<ProductEditorElement>> {
+    pub fn get_editor_element_mut(&mut self, mut idx: isize) -> Option<MutableVecAccess<ProductEditorElement>> {
-        if let Some(i) = self.n_indices.get(idx) {
+        idx = crate::modulo(idx, self.n_indices.len() as isize);
+        if let Some(i) = self.n_indices.get(idx as usize) {
             Some(self.elements.get_mut(*i))
         } else {
             None
@@ -98,8 +95,8 @@ impl ProductEditor {
         self.get_editor_element_mut(self.cursor?)
     }
 
-    pub fn get_editor(&self, idx: usize) -> Option<Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>> {
+    pub fn get_editor(&self, idx: isize) -> Option<Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>> {
-        if let Some(ProductEditorElement::N{ t: _, editor, select: _ }) = self.get_editor_element(idx) {
+        if let Some(ProductEditorElement::N{ t: _, editor, cur_depth: _ }) = self.get_editor_element(idx) {
             editor
         } else {
             None
@@ -123,14 +120,15 @@ impl TerminalEditor for ProductEditor {
     }
 
     fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
-        if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+        if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-            *select = true;
+            *cur_depth = self.get_cursor().tree_addr.len();
             if let Some(e) = editor.clone() {
                 match e.clone().write().unwrap().handle_terminal_event(event) {
                     TerminalEditorResult::Exit =>
                         match event {
                             TerminalEvent::Input(Event::Key(Key::Backspace)) => {
                                 *editor = None;
+                                *cur_depth -= 1;
                                 TerminalEditorResult::Continue
                             }
                             _ => {
@@ -149,6 +147,7 @@ impl TerminalEditor for ProductEditor {
                 *editor = Some(e.clone());
                 e.write().unwrap().dn();
                 let x = e.write().unwrap().handle_terminal_event(event);
+                *cur_depth = self.get_cursor().tree_addr.len();
                 x
             }
         } else {

nested/src/product/element.rs

@@ -1,72 +1,55 @@
 use {
     crate::{
-        core::{ViewPort, OuterViewPort, Observer, port::UpdateTask, TypeTerm, TypeLadder, Context},
+        core::{OuterViewPort, TypeLadder, Context},
         terminal::{
-            Terminal, TerminalAtom, TerminalCompositor, TerminalEditor,
+            TerminalEditor, TerminalStyle, TerminalView,
-            TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
             make_label
         },
-        sequence::{SequenceView},
+        tree_nav::{TerminalTreeEditor},
-        tree_nav::{TreeNav, TerminalTreeEditor, TreeCursor, TreeNavResult},
+        color::{bg_style_from_depth, fg_style_from_depth}
-        vec::{VecBuffer, MutableVecAccess},
-        index::buffer::IndexBuffer,
-        integer::PosIntEditor,
-        string_editor::{StringEditor, CharEditor},
-        list::{ListEditor, ListCursorMode, ListEditorStyle}
     },
-    cgmath::{Point2, Vector2},
     std::{sync::{Arc, RwLock}, ops::{Deref, DerefMut}},
     termion::event::{Event, Key},
 };
 
-
 #[derive(Clone)]
 pub enum ProductEditorElement {
-    T( String ),
+    T( String, usize ),
     N {
         t: TypeLadder,
         editor: Option<Arc<RwLock<dyn TerminalTreeEditor + Send + Sync>>>,
-        select: bool
+        cur_depth: usize
     }
 }
 
 impl ProductEditorElement {
     pub fn get_view(&self, ctx: Arc<RwLock<Context>>) -> OuterViewPort<dyn TerminalView> {
         match self {
-            ProductEditorElement::T(t) =>
+            ProductEditorElement::T(t, depth) =>
                 make_label(t.as_str())
-                .map_item(
+                .map_item({
-                    |i, x|
+                    let depth = *depth;
-                    x.add_style_back(TerminalStyle::fg_color((0,120,200)))
+                    move |i, x|
+                    x.add_style_back(fg_style_from_depth(depth))
+                }
             ),
 
-            ProductEditorElement::N {t: _, editor: Some(e), select} =>
+            ProductEditorElement::N { t: _, editor: Some(e), cur_depth } =>
                 e.read().unwrap()
                 .get_term_view()
-                .map_item({ let select = *select;
+                .map_item({ let cur_depth = *cur_depth;//e.read().unwrap().get_cursor().tree_addr.len()+1;
                             move |i, x| x
-                            .add_style_back(TerminalStyle::fg_color((250,210,0)))
+                            .add_style_back(fg_style_from_depth(cur_depth))//fg_color((250,210,0)))
-                            .add_style_back(
+                            .add_style_back(bg_style_from_depth(cur_depth))
-                                if select {
-                                    TerminalStyle::bg_color((40,40,40))
-                                } else {
-                                    TerminalStyle::default()
-                                }
-                            )
                 }),
 
-            ProductEditorElement::N{t, editor: None, select} =>
+            ProductEditorElement::N{ t, editor: None, cur_depth } =>
                 make_label(&ctx.read().unwrap().type_term_to_str(&t[0]))
-                .map_item({ let select = *select;
+                .map_item({
+                    let cur_depth = *cur_depth;
                     move |i, x| x
                             .add_style_back(TerminalStyle::fg_color((130,90,40)))
-                            .add_style_back(
+                            .add_style_back(bg_style_from_depth(cur_depth))
-                                if select {
-                                    TerminalStyle::bg_color((40,40,40))
-                                } else {
-                                    TerminalStyle::default()
-                                }
-                            )
                 })
         }        
     }

nested/src/product/nav.rs

@@ -1,20 +1,8 @@
 use {
     crate::{
-        core::{ViewPort, OuterViewPort, Observer, port::UpdateTask, TypeTerm, TypeLadder, Context},
+        list::ListCursorMode,
-        terminal::{
+        tree_nav::{TreeNav, TreeNavResult, TreeCursor, TerminalTreeEditor},
-            Terminal, TerminalAtom, TerminalCompositor, TerminalEditor,
+        product::{element::ProductEditorElement, ProductEditor}
-            TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
-            make_label
-        },
-        sequence::{SequenceView},
-        tree_nav::{TreeNav, TerminalTreeEditor, TreeCursor, TreeNavResult},
-        vec::{VecBuffer, MutableVecAccess},
-        index::buffer::IndexBuffer,
-        integer::PosIntEditor,
-        string_editor::{StringEditor, CharEditor},
-        list::{ListEditor, ListCursorMode, ListEditorStyle},
-        product::{element::ProductEditorElement, ProductEditor},
-        make_editor::make_editor
     },
     cgmath::{Point2, Vector2},
     std::{sync::{Arc, RwLock}, ops::{Deref, DerefMut}},
@@ -44,23 +32,23 @@ impl TreeNav for ProductEditor {
 
     fn goto(&mut self, mut c: TreeCursor) -> TreeNavResult {
         if let Some(mut element) = self.get_cur_element_mut() {
-            if let ProductEditorElement::N{ t, editor, select } = element.deref_mut() {
+            if let ProductEditorElement::N{ t, editor, cur_depth } = element.deref_mut() {
                 if let Some(e) = editor {
                     e.write().unwrap().goto(TreeCursor::default());
                 }
-                *select = false;
+                *cur_depth = self.get_cursor().tree_addr.len();
             }
         }
 
         if c.tree_addr.len() > 0 {
-            self.cursor = Some(c.tree_addr.remove(0));
+            self.cursor = Some(c.clone().tree_addr.remove(0));
 
             if let Some(mut element) = self.get_cur_element_mut() {
-                if let ProductEditorElement::N{ t, editor, select } = element.deref_mut() {
+                if let ProductEditorElement::N{ t, editor, cur_depth } = element.deref_mut() {
                     if let Some(e) = editor {
-                        e.write().unwrap().goto(c);
+                        e.write().unwrap().goto(c.clone());
                     }
-                    *select = true;
+                    *cur_depth = c.tree_addr.len() + 1;
                 }
             }
 
@@ -71,9 +59,13 @@ impl TreeNav for ProductEditor {
         }
     }
 
+    fn goby(&mut self, direction: Vector2<isize>) -> TreeNavResult {
+        TreeNavResult::Exit
+    }
+/*
     fn goto_home(&mut self) -> TreeNavResult {
         if let Some(c) = self.cursor {
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
                 if let Some(e) = editor {
                     let mut ce = e.write().unwrap();
 
@@ -84,7 +76,7 @@ impl TreeNav for ProductEditor {
                         return match ce.goto_home() {
                             TreeNavResult::Exit => {
                                 drop(ce);
-                                *select = false;
+                                *cur_depth = 0;
 
                                 match self.pxev() {
                                     TreeNavResult::Exit => TreeNavResult::Exit,
@@ -105,11 +97,11 @@ impl TreeNav for ProductEditor {
                     }
                 }
 
-                *select = false;
+                *cur_depth = 0;
                 if c != 0 {
                     self.cursor = Some(0);
-                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                        *select = true;
+                        *cur_depth = self.get_cursor().tree_addr.len() + 1;
                     }
                     return TreeNavResult::Continue;
                 }
@@ -121,7 +113,7 @@ impl TreeNav for ProductEditor {
 
     fn goto_end(&mut self) -> TreeNavResult {
         if let Some(c) = self.cursor {
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
                 if let Some(e) = editor {
                     let mut ce = e.write().unwrap();
 
@@ -132,7 +124,7 @@ impl TreeNav for ProductEditor {
                         match ce.goto_end() {
                             TreeNavResult::Exit => {
                                 drop(ce);
-                                *select = false;
+                                *cur_depth = 0;
 
                                 if c+1 < self.n_indices.len() {
                                     match self.nexd() {
@@ -158,11 +150,11 @@ impl TreeNav for ProductEditor {
                     }
                 }
 
-                *select = false;
+                *cur_depth = 0;
                 if c < self.n_indices.len()-1 {
                     self.cursor = Some(self.n_indices.len()-1);
-                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                        *select = true;
+                        *cur_depth = self.get_cursor().tree_addr.len();
                     }
                     return TreeNavResult::Continue;
                 }
@@ -174,7 +166,7 @@ impl TreeNav for ProductEditor {
 
     fn pxev(&mut self) -> TreeNavResult {
         if let Some(c) = self.cursor {
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_editor_element_mut(c).as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_editor_element_mut(c).as_deref_mut() {
                 if let Some(e) = editor {
                     let mut ce = e.write().unwrap();
 
@@ -185,12 +177,12 @@ impl TreeNav for ProductEditor {
                         return match ce.pxev() {
                             TreeNavResult::Exit => {
                                 drop(ce);
-                                *select = false;
+                                *cur_depth = 0;
 
                                 if c > 0 {
                                     self.cursor = Some(c-1);
-                                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                                        *select = true;
+                                        *cur_depth = self.get_cursor().tree_addr.len();
                                     }
 
                                     for _x in 1..depth {
@@ -212,11 +204,11 @@ impl TreeNav for ProductEditor {
                     }
                 }
 
-                *select = false;
+                *cur_depth = 0;
                 if c > 0 {
                     self.cursor = Some(c-1);
-                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                        *select = true;
+                        *cur_depth = self.get_cursor().tree_addr.len();
                     }
                     return TreeNavResult::Continue;
                 }
@@ -229,7 +221,7 @@ impl TreeNav for ProductEditor {
 
     fn nexd(&mut self) -> TreeNavResult {
         if let Some(c) = self.cursor.clone() {
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_editor_element_mut(c).as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_editor_element_mut(c).as_deref_mut() {
                 if let Some(e) = editor {
                     let mut ce = e.write().unwrap();
 
@@ -240,16 +232,17 @@ impl TreeNav for ProductEditor {
                         return match ce.nexd() {
                             TreeNavResult::Exit => {
                                 drop(ce);
-                                *select = false;
+                                *cur_depth = 0;
 
                                 if c+1 < self.n_indices.len() {
                                     self.cursor = Some(c+1);
-                                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                                        *select = true;
+                                        *cur_depth = self.get_cursor().tree_addr.len();
                                     }
 
                                     for _x in 1..depth {
                                         self.dn();
+                                        self.goto_home();
                                     }
 
                                     self.dn();
@@ -266,11 +259,11 @@ impl TreeNav for ProductEditor {
                     }
                 }
 
-                *select = false;
+                *cur_depth = 0;
                 if c+1 < self.n_indices.len() {
                     self.cursor = Some(c+1);
-                    if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+                    if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                        *select = true;
+                        *cur_depth = self.get_cursor().tree_addr.len();
                     }
 
                     return TreeNavResult::Continue;
@@ -283,15 +276,16 @@ impl TreeNav for ProductEditor {
     }
 
     fn up(&mut self) -> TreeNavResult {
-        if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+        if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
             if let Some(e) = editor {
                 let mut ce = e.write().unwrap();
+                *cur_depth = ce.get_cursor().tree_addr.len();
                 if ce.get_cursor().tree_addr.len() > 0 {
                     ce.up();
                     return TreeNavResult::Continue;
                 }
             }
-            *select = false;
+            *cur_depth = 0;
         }
 
         self.cursor = None;
@@ -300,24 +294,26 @@ impl TreeNav for ProductEditor {
 
     fn dn(&mut self) -> TreeNavResult {
         if let Some(c) = self.cursor {
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_editor_element_mut(c).as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_editor_element_mut(c).as_deref_mut() {
                 if let Some(e) = editor {
                     e.write().unwrap().dn();
                 } else {
                     let e = make_editor(self.ctx.clone(), t, self.depth+1);
-                    e.write().unwrap().goto_home();
+                    e.write().unwrap().dn();
                     *editor = Some(e);
                 }
+                *cur_depth = self.get_cursor().tree_addr.len();
             }
         } else {
             self.cursor = Some(0);
-            if let Some(ProductEditorElement::N{ t, editor, select }) = self.get_cur_element_mut().as_deref_mut() {
+            if let Some(ProductEditorElement::N{ t, editor, cur_depth }) = self.get_cur_element_mut().as_deref_mut() {
-                *select = true;
+                *cur_depth = self.get_cursor().tree_addr.len();
             }
         }
 
         TreeNavResult::Continue
-    }
+}
+    */
 }
 
 impl TerminalTreeEditor for ProductEditor {}

nested/src/sequence/decorator.rs

@@ -228,13 +228,13 @@ impl PTYSeqDecorate for OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn
              */
 
             SeqDecorStyle::Tuple =>  self
-                .separate(make_label(","))
+                .separate(make_label(", "))
                 .wrap(make_label("("), make_label(")"))
                 .to_grid_horizontal()
                 .flatten(),
 
             SeqDecorStyle::EnumSet => self
-                .separate(make_label(","))
+                .separate(make_label(", "))
                 .wrap(make_label("{"), make_label("}"))
                 .to_grid_horizontal()
                 .flatten(),
@@ -246,7 +246,7 @@ impl PTYSeqDecorate for OuterViewPort<dyn SequenceView<Item = OuterViewPort<dyn
                 .flatten(),
 
             SeqDecorStyle::Hex => self
-                .wrap(make_label("0"), make_label(""))
+                .wrap(make_label("0x"), make_label(""))
                 .to_grid_horizontal()
                 .flatten(),
         }

nested/src/string_editor.rs

@@ -1,151 +0,0 @@
-use {
-    crate::{
-        core::{OuterViewPort, ViewPort},
-        list::{sexpr::ListDecoration, ListEditor},
-        sequence::{SequenceView, SequenceViewExt},
-        singleton::{SingletonBuffer, SingletonView},
-        terminal::{
-            TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
-        },
-        tree_nav::{TreeCursor, TreeNav, TreeNavResult, TerminalTreeEditor},
-    },
-    std::sync::Arc,
-    std::sync::RwLock,
-    termion::event::{Event, Key},
-};
-
-//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
-
-pub struct CharEditor {
-    data: SingletonBuffer<Option<char>>,
-    data_port: ViewPort<dyn SingletonView<Item = Option<char>>>,
-}
-
-impl CharEditor {
-    pub fn new() -> Self {
-        let data_port = ViewPort::new();
-        CharEditor {
-            data: SingletonBuffer::new(None, data_port.inner()),
-            data_port,
-        }
-    }
-
-    pub fn get_data_port(&self) -> OuterViewPort<dyn SingletonView<Item = Option<char>>> {
-        self.data_port.outer()
-    }
-}
-
-impl TreeNav for CharEditor {}
-impl TerminalEditor for CharEditor {
-    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
-        crate::terminal::make_label(&if let Some(c) = self.data.get() {
-            c.to_string()
-        } else {
-            "".to_string()
-        })
-    }
-
-    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
-        match event {
-            TerminalEvent::Input(Event::Key(Key::Char('\n'))) => TerminalEditorResult::Continue,
-            TerminalEvent::Input(Event::Key(Key::Char(c))) => {
-                self.data.set(Some(*c));
-                TerminalEditorResult::Exit
-            }
-            TerminalEvent::Input(Event::Key(Key::Backspace))
-            | TerminalEvent::Input(Event::Key(Key::Delete)) => {
-                self.data.set(None);
-                TerminalEditorResult::Exit
-            }
-            _ => TerminalEditorResult::Continue,
-        }
-    }
-}
-
-impl TerminalTreeEditor for CharEditor {}
-
-//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
-
-pub struct StringEditor {
-    chars_editor:
-        ListEditor<CharEditor, Box<dyn Fn() -> Arc<RwLock<CharEditor>> + Send + Sync + 'static>>,
-}
-
-impl StringEditor {
-    pub fn new() -> Self {
-        StringEditor {
-            chars_editor: ListEditor::new(
-                Box::new(move || Arc::new(RwLock::new(CharEditor::new()))),
-                crate::list::ListEditorStyle::String,
-            ),
-        }
-    }
-
-    pub fn get_data_port(&self) -> OuterViewPort<dyn SequenceView<Item = char>> {
-        self.chars_editor
-            .get_data_port()
-            .map(|char_editor| char_editor.read().unwrap().data.get().unwrap_or('?'))
-    }
-
-    pub fn get_plain_editor_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.chars_editor
-            .get_seg_seq_view()
-            .to_grid_horizontal()
-            .flatten()
-    }
-    
-    pub fn get_string(&self) -> String {
-        self.get_data_port().get_view().unwrap().iter().collect()
-    }
-}
-
-impl TreeNav for StringEditor {
-    fn get_cursor(&self) -> TreeCursor {
-        self.chars_editor.get_cursor()
-    }
-    fn goto(&mut self, cur: TreeCursor) -> TreeNavResult {
-        self.chars_editor.goto(cur)
-    }
-    fn goto_home(&mut self) -> TreeNavResult {
-        self.chars_editor.goto_home()
-    }
-    fn goto_end(&mut self) -> TreeNavResult {
-        self.chars_editor.goto_end()
-    }
-    fn pxev(&mut self) -> TreeNavResult {
-        self.chars_editor.pxev()
-    }
-    fn nexd(&mut self) -> TreeNavResult {
-        self.chars_editor.nexd()
-    }
-    fn up(&mut self) -> TreeNavResult {
-        self.chars_editor.up()
-    }
-    fn dn(&mut self) -> TreeNavResult {
-        self.chars_editor.dn()
-    }
-}
-
-impl TerminalEditor for StringEditor {
-    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.chars_editor
-            .get_seg_seq_view()
-            .decorate("\"", "\"", "", 1)
-            .to_grid_horizontal()
-            .flatten()
-            .map_item(|_idx, atom| atom.add_style_back(TerminalStyle::fg_color((120, 200, 10))))
-    }
-
-    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
-        match event {
-            TerminalEvent::Input(Event::Key(Key::Char('\n'))) => {
-                self.chars_editor.up();
-                TerminalEditorResult::Exit
-            }
-            event => self.chars_editor.handle_terminal_event(event),
-        }
-    }
-}
-
-impl TerminalTreeEditor for StringEditor {}
-

nested/src/tree_nav.rs

@@ -1,4 +1,7 @@
-use crate::list::ListCursorMode;
+use {
+    crate::list::ListCursorMode,
+    cgmath::Vector2
+};
 
 #[derive(Clone, Copy, Eq, PartialEq)]
 pub enum TreeNavResult {
@@ -20,49 +23,43 @@ impl From<TreeNavResult> for TerminalEditorResult {
 #[derive(Clone, Eq, PartialEq)]
 pub struct TreeCursor {
     pub leaf_mode: ListCursorMode,
-    pub tree_addr: Vec<usize>,
+    pub tree_addr: Vec<isize>,
 }
 
 impl TreeCursor {
     pub fn home() -> Self {
         TreeCursor {
-            leaf_mode: ListCursorMode::Select,
+            leaf_mode: ListCursorMode::Insert,
             tree_addr: vec![0]
         }
     }
+
+    pub fn none() -> Self {
+        TreeCursor {
+            leaf_mode: ListCursorMode::Insert,
+            tree_addr: vec![],
+        }
+    }
 }
 
 impl Default for TreeCursor {
     fn default() -> Self {
-        TreeCursor {
+        TreeCursor::none()
-            leaf_mode: ListCursorMode::Select,
-            tree_addr: vec![],
-        }
     }
 }
 
 pub trait TreeNav {
-    fn up(&mut self) -> TreeNavResult {
+    /* CORE
-        TreeNavResult::Exit
+    */
+    fn get_cursor(&self) -> TreeCursor {
+        TreeCursor::default()
     }
 
-    fn dn(&mut self) -> TreeNavResult {
+    fn get_cursor_warp(&self) -> TreeCursor {
-        TreeNavResult::Exit
+        TreeCursor::default()
     }
 
-    fn pxev(&mut self) -> TreeNavResult {
+    fn goby(&mut self, direction: Vector2<isize>) -> TreeNavResult {
-        TreeNavResult::Exit
-    }
-
-    fn nexd(&mut self) -> TreeNavResult {
-        TreeNavResult::Exit
-    }
-
-    fn goto_home(&mut self) -> TreeNavResult {
-        TreeNavResult::Exit
-    }
-
-    fn goto_end(&mut self) -> TreeNavResult {
         TreeNavResult::Exit
     }
 
@@ -70,8 +67,85 @@ pub trait TreeNav {
         TreeNavResult::Exit
     }
 
-    fn get_cursor(&self) -> TreeCursor {
+    /* HULL
-        TreeCursor::default()
+    */
+    fn set_addr(&mut self, addr: isize) -> TreeNavResult {
+        let mut c = self.get_cursor();
+        c.tree_addr[0] = addr;
+        self.goto(c)
+    }
+
+    fn set_leaf_mode(&mut self, new_leaf_mode: ListCursorMode) -> TreeNavResult {
+        let mut c = self.get_cursor();
+        c.leaf_mode = new_leaf_mode;
+        self.goto(c)
+    }
+
+    fn up(&mut self) -> TreeNavResult {
+        self.goby(Vector2::new(0, -1))
+    }
+
+    fn dn(&mut self) -> TreeNavResult {
+        self.goby(Vector2::new(0, 1))
+    }
+
+    fn pxev(&mut self) -> TreeNavResult {
+        self.goby(Vector2::new(-1, 0))
+    }
+
+    fn nexd(&mut self) -> TreeNavResult {
+        self.goby(Vector2::new(1, 0))
+    }
+
+    // TODO
+    fn qpxev(&mut self) -> TreeNavResult {
+        let mut c = self.get_cursor();
+        match c.tree_addr.len() {
+            0 => {
+                self.goto(TreeCursor::home())
+            },
+            depth => {
+                if c.tree_addr[depth-1] != 0 {
+                    c.tree_addr[depth-1] = 0;
+                } else {
+                    for i in (0..depth-1).rev() {
+                        if c.tree_addr[i] == 0 {
+                            c.tree_addr[i] = -1;
+                        } else {
+                            c.tree_addr[i] -=1;
+                            break;
+                        }
+                    }
+                }
+
+                self.goto(c)
+            }
+        }
+    }
+
+    fn qnexd(&mut self) -> TreeNavResult {
+        let mut c = self.get_cursor_warp();
+        match c.tree_addr.len() {
+            0 => {
+                TreeNavResult::Exit
+            },
+            depth => {
+                if c.tree_addr[depth-1] != -1 {
+                    c.tree_addr[depth-1] = -1;
+                } else {
+                    for i in (0..depth-1).rev() {
+                        if c.tree_addr[i] == -1 {
+                            c.tree_addr[i] = 0;
+                        } else {
+                            c.tree_addr[i] += 1;
+                            break;
+                        }
+                    }
+                }
+
+                self.goto(c)
+            }
+        }
     }
 }
 

shell/src/command.rs

@@ -0,0 +1,194 @@
+use {
+    std::{
+        sync::{Arc, RwLock},
+        collections::HashMap
+    },
+    cgmath::{Point2},
+    termion::event::{Event, Key},
+    nested::{
+        list::{sexpr::ListDecoration, ListEditor, ListEditorStyle},
+        core::TypeTerm,
+        core::{OuterViewPort, ViewPort},
+        index::{IndexArea, IndexView},
+        string_editor::StringEditor,
+        vec::VecBuffer,
+        terminal::{
+            TerminalAtom, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView, make_label
+        },
+        tree_nav::{TreeCursor, TreeNav, TreeNavResult},
+    }
+};
+
+trait Action {
+    fn make_editor(&self) ->
+        (Arc<RwLock<dyn TerminalEditor + Send + Sync>>,
+         Arc<RwLock<dyn TreeNav + Send + Sync>>);
+}
+
+pub struct ActCd {}
+impl Action for ActCd {
+    fn make_editor(&self) ->
+        (Arc<RwLock<dyn TerminalEditor + Send + Sync>>,
+         Arc<RwLock<dyn TreeNav + Send + Sync>>)
+    {
+        let ed =
+            Arc::new(RwLock::new(ListEditor::new(
+                Box::new(|| {
+                    Arc::new(RwLock::new(StringEditor::new()))
+                }) as Box<dyn Fn() -> Arc<RwLock<StringEditor>> + Send + Sync>,
+                ListEditorStyle::HorizontalSexpr,
+            )));
+        //Arc::new(RwLock::new(StringEditor::new()));
+
+        (ed.clone() as Arc<RwLock<dyn TerminalEditor + Send + Sync>>, ed as Arc<RwLock<dyn TreeNav + Send + Sync>>)
+    }
+}
+
+
+pub struct Commander {
+    cmds: HashMap<String, Arc<dyn Action + Send + Sync>>,
+
+    symbol_editor: StringEditor,
+    cmd_editor: Option<(
+        Arc<RwLock<dyn TerminalEditor + Send + Sync>>,
+        Arc<RwLock<dyn TreeNav + Send + Sync>>
+    )>,
+
+    view_elements: VecBuffer<OuterViewPort<dyn TerminalView>>,
+    out_port: OuterViewPort<dyn TerminalView>,
+}
+
+impl Commander {
+    pub fn new() -> Self {
+        let port = ViewPort::new();
+        let mut view_elements = VecBuffer::new(port.inner());
+        let symbol_editor = StringEditor::new();
+
+        view_elements.push(symbol_editor.get_plain_editor_view());
+
+        let mut cmds = HashMap::new();
+        cmds.insert("cd".into(), Arc::new(ActCd{}) as Arc<dyn Action + Send + Sync>);
+        cmds.insert("echo".into(), Arc::new(ActCd{}) as Arc<dyn Action + Send + Sync>);
+        cmds.insert("ls".into(), Arc::new(ActCd{}) as Arc<dyn Action + Send + Sync>);
+
+        let mut c = Commander {
+            cmds,
+            symbol_editor,
+            cmd_editor: None,
+            view_elements,
+            out_port: port.outer()
+                .to_sequence()
+                .to_grid_horizontal()
+                .flatten()
+        };
+
+        c
+    }
+}
+
+impl TerminalEditor for Commander {
+    fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
+        self.out_port.clone()
+    }
+
+    fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            match event {
+                TerminalEvent::Input(Event::Key(Key::Char('\n'))) => {
+                    // run
+                    cmd_editor.1.write().unwrap().up();
+                    TerminalEditorResult::Exit
+                }
+                event => {
+                    cmd_editor.0.write().unwrap().handle_terminal_event(event)
+                }
+            }
+        } else {
+            match event {
+                TerminalEvent::Input(Event::Key(Key::Char(' '))) |
+                TerminalEvent::Input(Event::Key(Key::Char('\n'))) => {
+                    let symbol = self.symbol_editor.get_string();
+
+                    if let Some(action) = self.cmds.get(&symbol) {
+                        let editor = action.make_editor();
+
+                        self.symbol_editor.up();
+                        self.view_elements.push(make_label(" "));
+                        self.view_elements.push(editor.0.read().unwrap().get_term_view());
+
+                        editor.1.write().unwrap().goto_home();
+                        self.cmd_editor = Some(editor);
+                    }
+
+                    TerminalEditorResult::Continue
+                }
+
+                event => {
+                    self.symbol_editor.handle_terminal_event(event)
+                }
+            }        
+        }
+    }
+}
+
+impl TreeNav for Commander {
+    fn get_cursor(&self) -> TreeCursor {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().get_cursor()
+        } else {
+            self.symbol_editor.get_cursor()
+        }
+    }
+
+    fn goto(&mut self, cur: TreeCursor) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().goto(cur)
+        } else {
+            self.symbol_editor.goto(cur)
+        }
+    }
+    fn goto_home(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().goto_home()
+        } else {
+            self.symbol_editor.goto_home()
+        }
+    }
+    fn goto_end(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().goto_end()
+        } else {
+            self.symbol_editor.goto_end()
+        }
+    }
+    fn pxev(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().pxev()
+        } else {
+            self.symbol_editor.pxev()
+        }
+    }
+    fn nexd(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().nexd()
+        } else {
+            self.symbol_editor.nexd()
+        }
+    }
+    fn up(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().up()
+        } else {
+            self.symbol_editor.up()
+        }
+    }
+    fn dn(&mut self) -> TreeNavResult {
+        if let Some(cmd_editor) = self.cmd_editor.as_ref() {
+            cmd_editor.1.write().unwrap().dn()
+        } else {
+            self.symbol_editor.dn()
+        }
+    }
+}
+
+

shell/src/main.rs

@@ -13,12 +13,13 @@ use {
     nested::{
         core::{port::UpdateTask, Observer, OuterViewPort, ViewPort},
         index::IndexArea,
-        list::{ListCursorMode, ListEditor, ListEditorStyle},
+        list::{ListCursorMode, PTYListEditor},
+        sequence::{decorator::{SeqDecorStyle}},
         terminal::{
             make_label, Terminal, TerminalAtom, TerminalCompositor, TerminalEditor,
             TerminalEditorResult, TerminalEvent, TerminalStyle, TerminalView,
         },
-        tree_nav::{TerminalTreeEditor, TreeCursor, TreeNavResult},
+        tree_nav::{TreeNav, TerminalTreeEditor, TreeCursor, TreeNavResult},
         vec::VecBuffer,
     },
     std::sync::{Arc, RwLock},
@@ -34,9 +35,7 @@ async fn main() {
     let term_writer = term.get_writer();
 
     async_std::task::spawn(async move {
-        let table_port =
+        let mut table = nested::index::buffer::IndexBuffer::new();
-            ViewPort::<dyn nested::grid::GridView<Item = OuterViewPort<dyn TerminalView>>>::new();
-        let mut table_buf = nested::index::buffer::IndexBuffer::new(table_port.inner());
 
         let magic =
             make_label("<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>").map_item(|pos, atom| {
@@ -47,21 +46,17 @@ async fn main() {
                 )))
             });
 
-        let cur_size_port = ViewPort::new();
+        let mut cur_size = nested::singleton::SingletonBuffer::new(Vector2::new(10, 10));
-        let mut cur_size =
+        let mut status_chars = VecBuffer::new();
-            nested::singleton::SingletonBuffer::new(Vector2::new(10, 10), cur_size_port.inner());
 
-        let status_chars_port = ViewPort::new();
+        let mut process_list_editor = PTYListEditor::new(
-        let mut status_chars = VecBuffer::new(status_chars_port.inner());
-
-        let mut process_list_editor = ListEditor::new(
             Box::new(|| Arc::new(RwLock::new(ProcessLauncher::new()))),
-            ListEditorStyle::VerticalSexpr,
+            SeqDecorStyle::VerticalSexpr,
+            0
         );
 
-        let plist_vec_port = ViewPort::new();
+        let mut plist = VecBuffer::new();
-        let mut plist = VecBuffer::new(plist_vec_port.inner());
+        let mut plist_port = plist.get_port();
-
         async_std::task::spawn(async move {
             let (w, _h) = termion::terminal_size().unwrap();
             let mut x: usize = 0;
@@ -89,13 +84,13 @@ async fn main() {
         });
 
         let plot_port = ViewPort::new();
-        let _plot = crate::plot::Plot::new(plist_vec_port.outer().to_sequence(), plot_port.inner());
+        let _plot = crate::plot::Plot::new(plist_port.to_sequence(), plot_port.inner());
 
-        table_buf.insert_iter(vec![
+        table.insert_iter(vec![
             (Point2::new(0, 0), magic.clone()),
             (
                 Point2::new(0, 1),
-                status_chars_port.outer().to_sequence().to_grid_horizontal(),
+                status_chars.get_port().to_sequence().to_grid_horizontal(),
             ),
             (Point2::new(0, 2), magic.clone()),
             (Point2::new(0, 3), process_list_editor.get_term_view()),
@@ -104,8 +99,7 @@ async fn main() {
         let (w, h) = termion::terminal_size().unwrap();
 
         compositor.write().unwrap().push(
-            plot_port
+            plot_port.outer()
-                .outer()
                 .map_item(|pt, a| {
                     a.add_style_back(TerminalStyle::fg_color((
                         255 - pt.y as u8 * 8,
@@ -124,7 +118,7 @@ async fn main() {
         compositor
             .write()
             .unwrap()
-            .push(table_port.outer().flatten().offset(Vector2::new(3, 0)));
+            .push(table.get_port().flatten().offset(Vector2::new(3, 0)));
 
         process_list_editor.goto(TreeCursor {
             leaf_mode: ListCursorMode::Insert,
@@ -165,8 +159,7 @@ async fn main() {
                 ));
                 for c in match cur.leaf_mode {
                     ListCursorMode::Insert => "INSERT",
-                    ListCursorMode::Select => "SELECT",
+                    ListCursorMode::Select => "SELECT"
-                    ListCursorMode::Modify => "MODIFY",
                 }
                 .chars()
                 {
@@ -226,19 +219,19 @@ async fn main() {
                 TerminalEvent::Input(Event::Key(Key::Up)) => {
                     if process_list_editor.up() == TreeNavResult::Exit {
                         process_list_editor.dn();
-                        process_list_editor.goto_home();
                     }
                 }
                 TerminalEvent::Input(Event::Key(Key::Down)) => {
-                    if process_list_editor.dn() == TreeNavResult::Continue {
+                    process_list_editor.dn();
-                        process_list_editor.goto_home();
+                    // == TreeNavResult::Continue {
-                    }
+                        //process_list_editor.goto_home();
+                    //}
                 }
                 TerminalEvent::Input(Event::Key(Key::Home)) => {
-                    process_list_editor.goto_home();
+                    process_list_editor.qpxev();
                 }
                 TerminalEvent::Input(Event::Key(Key::End)) => {
-                    process_list_editor.goto_end();
+                    process_list_editor.qnexd();
                 }
                 ev => {
                     if process_list_editor.get_cursor().leaf_mode == ListCursorMode::Select {
@@ -256,10 +249,10 @@ async fn main() {
                                 process_list_editor.nexd();
                             }
                             TerminalEvent::Input(Event::Key(Key::Char('u'))) => {
-                                process_list_editor.goto_home();
+                                process_list_editor.qpxev();
                             }
                             TerminalEvent::Input(Event::Key(Key::Char('o'))) => {
-                                process_list_editor.goto_end();
+                                process_list_editor.qnexd();
                             }
                             _ => {
                                 process_list_editor.handle_terminal_event(&ev);

shell/src/process.rs

@@ -2,10 +2,10 @@ use {
     crate::pty::{PTYStatus, PTY},
     nested::{
         core::{OuterViewPort, ViewPort},
-        list::{sexpr::ListDecoration, ListCursorMode, ListEditor, ListEditorStyle},
+        list::{ListCursorMode, PTYListEditor},
-        sequence::{SequenceView, SequenceViewExt},
+        sequence::{SequenceView, SequenceViewExt, decorator::{SeqDecorStyle, Separate, Wrap}},
         singleton::SingletonView,
-        string_editor::CharEditor,
+        char_editor::CharEditor,
         terminal::{
             TerminalAtom, TerminalEditor, TerminalEditorResult, TerminalEvent, TerminalStyle,
             TerminalView,
@@ -15,13 +15,14 @@ use {
     std::sync::Arc,
     std::sync::RwLock,
     termion::event::{Event, Key},
+    cgmath::Vector2
 };
 
 //<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
 
 pub struct ProcessArg {
     editor:
-        ListEditor<CharEditor, Box<dyn Fn() -> Arc<RwLock<CharEditor>> + Send + Sync + 'static>>,
+        PTYListEditor<CharEditor>,
 }
 
 impl ProcessArg {
@@ -30,7 +31,7 @@ impl ProcessArg {
             char_editor
                 .read()
                 .unwrap()
-                .get_data_port()
+                .get_port()
                 .get_view()
                 .unwrap()
                 .get()
@@ -41,10 +42,7 @@ impl ProcessArg {
 
 impl TerminalEditor for ProcessArg {
     fn get_term_view(&self) -> OuterViewPort<dyn TerminalView> {
-        self.editor
+        self.editor.get_term_view()
-            .get_seg_seq_view()
-            .to_grid_horizontal()
-            .flatten()
     }
 
     fn handle_terminal_event(&mut self, event: &TerminalEvent) -> TerminalEditorResult {
@@ -64,32 +62,21 @@ impl TreeNav for ProcessArg {
     fn get_cursor(&self) -> TreeCursor {
         self.editor.get_cursor()
     }
+    fn get_cursor_warp(&self) -> TreeCursor {
+        self.editor.get_cursor_warp()
+    }
     fn goto(&mut self, cur: TreeCursor) -> TreeNavResult {
         self.editor.goto(cur)
     }
-    fn goto_home(&mut self) -> TreeNavResult {
+    fn goby(&mut self, dir: Vector2<isize>) -> TreeNavResult {
-        self.editor.goto_home()
+        self.editor.goby(dir)
-    }
-    fn goto_end(&mut self) -> TreeNavResult {
-        self.editor.goto_end()
-    }
-    fn pxev(&mut self) -> TreeNavResult {
-        self.editor.pxev()
-    }
-    fn nexd(&mut self) -> TreeNavResult {
-        self.editor.nexd()
-    }
-    fn up(&mut self) -> TreeNavResult {
-        self.editor.up()
-    }
-    fn dn(&mut self) -> TreeNavResult {
-        self.editor.dn()
     }
 }
 
+impl TerminalTreeEditor for ProcessArg {}
+
 pub struct ProcessLauncher {
-    cmd_editor:
+    cmd_editor: PTYListEditor<ProcessArg>,
-        ListEditor<ProcessArg, Box<dyn Fn() -> Arc<RwLock<ProcessArg>> + Send + Sync + 'static>>,
     pty: Option<crate::pty::PTY>,
     _ptybox: Arc<RwLock<crate::ascii_box::AsciiBox>>,
     suspended: bool,
@@ -109,16 +96,18 @@ impl ProcessLauncher {
         let box_port = ViewPort::<dyn TerminalView>::new();
         let compositor = nested::terminal::TerminalCompositor::new(comp_port.inner());
 
-        let cmd_editor = ListEditor::new(
+        let cmd_editor = PTYListEditor::new(
             Box::new(|| {
                 Arc::new(RwLock::new(ProcessArg {
-                    editor: ListEditor::new(
+                    editor: PTYListEditor::new(
                         Box::new(|| Arc::new(RwLock::new(CharEditor::new()))),
-                        ListEditorStyle::Plain,
+                        SeqDecorStyle::Plain,
+                        1
                     ),
                 }))
             }) as Box<dyn Fn() -> Arc<RwLock<ProcessArg>> + Send + Sync>,
-            ListEditorStyle::Plain,
+            SeqDecorStyle::HorizontalSexpr,
+            0
         );
 
         compositor.write().unwrap().push(
@@ -127,11 +116,7 @@ impl ProcessLauncher {
                 .map_item(|_idx, x| x.add_style_back(TerminalStyle::fg_color((90, 120, 100)))),
         );
         compositor.write().unwrap().push(
-            cmd_editor
+            cmd_editor.get_term_view()
-                .get_seg_seq_view()
-                .decorate("$(", ")", " ", 0)
-                .to_grid_horizontal()
-                .flatten(),
         );
 
         ProcessLauncher {
@@ -251,6 +236,9 @@ impl TreeNav for ProcessLauncher {
     fn get_cursor(&self) -> TreeCursor {
         self.cmd_editor.get_cursor()
     }
+    fn get_cursor_warp(&self) -> TreeCursor {
+        self.cmd_editor.get_cursor_warp()
+    }
 
     fn goto(&mut self, cur: TreeCursor) -> TreeNavResult {
         self.suspended = false;
@@ -269,27 +257,10 @@ impl TreeNav for ProcessLauncher {
         }
     }
 
-    fn goto_home(&mut self) -> TreeNavResult {
+    fn goby(&mut self, dir: Vector2<isize>) -> TreeNavResult {
-        self.cmd_editor.goto_home()
+        self.cmd_editor.goby(dir)
     }
 
-    fn goto_end(&mut self) -> TreeNavResult {
-        self.cmd_editor.goto_end()
-    }
-
-    fn pxev(&mut self) -> TreeNavResult {
-        self.cmd_editor.pxev()
-    }
-
-    fn nexd(&mut self) -> TreeNavResult {
-        self.cmd_editor.nexd()
-    }
-
-    fn up(&mut self) -> TreeNavResult {
-        self.cmd_editor.up()
-    }
-
-    fn dn(&mut self) -> TreeNavResult {
-        self.cmd_editor.dn()
-    }
 }
+
+impl TerminalTreeEditor for ProcessLauncher {}

shell/src/pty.rs

@@ -57,7 +57,7 @@ impl PTY {
 
         if let Ok(child) = pair.slave.spawn_command(cmd) {
             let mut reader = pair.master.try_clone_reader().unwrap();
-            let mut status_buf = SingletonBuffer::new(
+            let mut status_buf = SingletonBuffer::with_port(
                 PTYStatus::Running {
                     pid: child.process_id().expect(""),
                 },