Derive a separate ViewId type.

helix-view/src/editor.rs

@@ -1,9 +1,9 @@
-use crate::{theme::Theme, tree::Tree, Document, DocumentId, View};
+use crate::{theme::Theme, tree::Tree, Document, DocumentId, View, ViewId};
 use tui::layout::Rect;
 
 use std::path::PathBuf;
 
-use slotmap::{DefaultKey as Key, SlotMap};
+use slotmap::SlotMap;
 
 use anyhow::Error;
 
@@ -90,7 +90,7 @@ impl Editor {
         Ok(id)
     }
 
-    pub fn close(&mut self, id: Key) {
+    pub fn close(&mut self, id: ViewId) {
         let view = self.tree.get(self.tree.focus);
         // get around borrowck issues
         let language_servers = &mut self.language_servers;
@@ -133,7 +133,7 @@ impl Editor {
         self.tree.get_mut(self.tree.focus)
     }
 
-    pub fn ensure_cursor_in_view(&mut self, id: Key) {
+    pub fn ensure_cursor_in_view(&mut self, id: ViewId) {
         let view = self.tree.get_mut(id);
         let doc = &self.documents[view.doc];
         view.ensure_cursor_in_view(doc)

helix-view/src/lib.rs

@@ -6,6 +6,7 @@ pub mod view;
 
 use slotmap::new_key_type;
 new_key_type! { pub struct DocumentId; }
+new_key_type! { pub struct ViewId; }
 
 pub use document::Document;
 pub use editor::Editor;

helix-view/src/tree.rs

@@ -1,24 +1,24 @@
-use crate::View;
+use crate::{View, ViewId};
-use slotmap::{DefaultKey as Key, HopSlotMap};
+use slotmap::HopSlotMap;
 use tui::layout::Rect;
 
 // the dimensions are recomputed on windo resize/tree change.
 //
 pub struct Tree {
-    root: Key,
+    root: ViewId,
     // (container, index inside the container)
-    pub focus: Key,
+    pub focus: ViewId,
     // fullscreen: bool,
     area: Rect,
 
-    nodes: HopSlotMap<Key, Node>,
+    nodes: HopSlotMap<ViewId, Node>,
 
     // used for traversals
-    stack: Vec<(Key, Rect)>,
+    stack: Vec<(ViewId, Rect)>,
 }
 
 pub struct Node {
-    parent: Key,
+    parent: ViewId,
     content: Content,
 }
 
@@ -30,14 +30,14 @@ pub enum Content {
 impl Node {
     pub fn container() -> Self {
         Node {
-            parent: Key::default(),
+            parent: ViewId::default(),
             content: Content::Container(Box::new(Container::new())),
         }
     }
 
     pub fn view(view: View) -> Self {
         Node {
-            parent: Key::default(),
+            parent: ViewId::default(),
             content: Content::View(Box::new(view)),
         }
     }
@@ -53,7 +53,7 @@ pub enum Layout {
 
 pub struct Container {
     layout: Layout,
-    children: Vec<Key>,
+    children: Vec<ViewId>,
     area: Rect,
 }
 
@@ -77,7 +77,7 @@ impl Tree {
     pub fn new(area: Rect) -> Self {
         let root = Node::container();
 
-        let mut nodes = HopSlotMap::new();
+        let mut nodes = HopSlotMap::with_key();
         let root = nodes.insert(root);
 
         // root is it's own parent
@@ -93,7 +93,7 @@ impl Tree {
         }
     }
 
-    pub fn insert(&mut self, view: View) -> Key {
+    pub fn insert(&mut self, view: View) -> ViewId {
         let focus = self.focus;
         let parent = self.nodes[focus].parent;
         let mut node = Node::view(view);
@@ -131,7 +131,7 @@ impl Tree {
         node
     }
 
-    pub fn remove(&mut self, index: Key) {
+    pub fn remove(&mut self, index: ViewId) {
         let mut stack = Vec::new();
 
         if self.focus == index {
@@ -188,7 +188,7 @@ impl Tree {
             })
     }
 
-    pub fn get(&self, index: Key) -> &View {
+    pub fn get(&self, index: ViewId) -> &View {
         match &self.nodes[index] {
             Node {
                 content: Content::View(view),
@@ -198,7 +198,7 @@ impl Tree {
         }
     }
 
-    pub fn get_mut(&mut self, index: Key) -> &mut View {
+    pub fn get_mut(&mut self, index: ViewId) -> &mut View {
         match &mut self.nodes[index] {
             Node {
                 content: Content::View(view),
@@ -355,7 +355,7 @@ impl Tree {
 
 pub struct Traverse<'a> {
     tree: &'a Tree,
-    stack: Vec<Key>, // TODO: reuse the one we use on update
+    stack: Vec<ViewId>, // TODO: reuse the one we use on update
 }
 
 impl<'a> Traverse<'a> {
@@ -368,7 +368,7 @@ impl<'a> Traverse<'a> {
 }
 
 impl<'a> Iterator for Traverse<'a> {
-    type Item = (Key, &'a View);
+    type Item = (ViewId, &'a View);
 
     fn next(&mut self) -> Option<Self::Item> {
         loop {

helix-view/src/view.rs

@@ -2,18 +2,17 @@ use anyhow::Error;
 
 use std::borrow::Cow;
 
-use crate::{Document, DocumentId};
+use crate::{Document, DocumentId, ViewId};
 use helix_core::{
     graphemes::{grapheme_width, RopeGraphemes},
     Position, RopeSlice,
 };
-use slotmap::DefaultKey as Key;
 use tui::layout::Rect;
 
 pub const PADDING: usize = 5;
 
 pub struct View {
-    pub id: Key,
+    pub id: ViewId,
     pub doc: DocumentId,
     pub first_line: usize,
     pub area: Rect,
@@ -22,7 +21,7 @@ pub struct View {
 impl View {
     pub fn new(doc: DocumentId) -> Result<Self, Error> {
         let view = Self {
-            id: Key::default(),
+            id: ViewId::default(),
             doc,
             first_line: 0,
             area: Rect::default(), // will get calculated upon inserting into tree