Remove File::select_language

We want to make File a trait object defined in the buffer crate to decouple buffer from worktree, and this method is in the way.

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

zed/src/editor.rs

@@ -2652,7 +2652,7 @@ impl workspace::ItemView for Editor {
 
     fn save_as(
         &mut self,
-        worktree: &ModelHandle<Worktree>,
+        worktree: ModelHandle<Worktree>,
         path: &Path,
         cx: &mut ViewContext<Self>,
     ) -> Task<Result<()>> {
@@ -2670,9 +2670,16 @@ impl workspace::ItemView for Editor {
 
             cx.spawn(|buffer, mut cx| async move {
                 save_as.await.map(|new_file| {
+                    let language = worktree.read_with(&cx, |worktree, cx| {
+                        worktree
+                            .languages()
+                            .select_language(new_file.full_path(cx))
+                            .cloned()
+                    });
+
                     buffer.update(&mut cx, |buffer, cx| {
-                        buffer.set_language(new_file.select_language(cx), cx);
                         buffer.did_save(version, new_file.mtime, Some(new_file), cx);
+                        buffer.set_language(language, cx);
                     });
                 })
             })

zed/src/workspace.rs

@@ -185,7 +185,7 @@ pub trait ItemView: View {
     fn save(&mut self, cx: &mut ViewContext<Self>) -> Result<Task<Result<()>>>;
     fn save_as(
         &mut self,
-        worktree: &ModelHandle<Worktree>,
+        worktree: ModelHandle<Worktree>,
         path: &Path,
         cx: &mut ViewContext<Self>,
     ) -> Task<anyhow::Result<()>>;
@@ -229,7 +229,7 @@ pub trait ItemViewHandle {
     fn save(&self, cx: &mut MutableAppContext) -> Result<Task<Result<()>>>;
     fn save_as(
         &self,
-        worktree: &ModelHandle<Worktree>,
+        worktree: ModelHandle<Worktree>,
         path: &Path,
         cx: &mut MutableAppContext,
     ) -> Task<anyhow::Result<()>>;
@@ -317,7 +317,7 @@ impl<T: ItemView> ItemViewHandle for ViewHandle<T> {
 
     fn save_as(
         &self,
-        worktree: &ModelHandle<Worktree>,
+        worktree: ModelHandle<Worktree>,
         path: &Path,
         cx: &mut MutableAppContext,
     ) -> Task<anyhow::Result<()>> {
@@ -768,7 +768,7 @@ impl Workspace {
                                 Ok((worktree, path)) => {
                                     handle
                                         .update(&mut cx, |_, cx| {
-                                            item.save_as(&worktree, &path, cx.as_mut())
+                                            item.save_as(worktree, &path, cx.as_mut())
                                         })
                                         .await
                                 }

zed/src/worktree.rs

@@ -5,7 +5,7 @@ use crate::{
     editor::{self, Buffer, History, Operation, Rope},
     fs::{self, Fs},
     fuzzy::CharBag,
-    language::{Language, LanguageRegistry},
+    language::LanguageRegistry,
     rpc::{self, proto, Status},
     time::{self, ReplicaId},
     util::{Bias, TryFutureExt},
@@ -288,6 +288,13 @@ impl Worktree {
         }
     }
 
+    pub fn languages(&self) -> &Arc<LanguageRegistry> {
+        match self {
+            Worktree::Local(worktree) => &worktree.languages,
+            Worktree::Remote(worktree) => &worktree.languages,
+        }
+    }
+
     pub fn handle_add_peer(
         &mut self,
         envelope: TypedEnvelope<proto::AddPeer>,
@@ -856,8 +863,12 @@ impl LocalWorktree {
                 let (file, contents) = this
                     .update(&mut cx, |this, cx| this.as_local().unwrap().load(&path, cx))
                     .await?;
+                let language = this.read_with(&cx, |this, cx| {
+                    this.languages()
+                        .select_language(file.full_path(cx))
+                        .cloned()
+                });
                 let buffer = cx.add_model(|cx| {
-                    let language = file.select_language(cx);
                     Buffer::from_history(0, History::new(contents.into()), Some(file), language, cx)
                 });
                 this.update(&mut cx, |this, _| {
@@ -1261,7 +1272,11 @@ impl RemoteWorktree {
                     .upgrade(&cx)
                     .ok_or_else(|| anyhow!("worktree was closed"))?;
                 let file = File::new(entry.id, this.clone(), entry.path, entry.mtime);
-                let language = cx.read(|cx| file.select_language(cx));
+                let language = this.read_with(&cx, |this, cx| {
+                    this.languages()
+                        .select_language(file.full_path(cx))
+                        .cloned()
+                });
                 let remote_buffer = response.buffer.ok_or_else(|| anyhow!("empty buffer"))?;
                 let buffer_id = remote_buffer.id as usize;
                 let buffer = cx.add_model(|cx| {
@@ -1819,20 +1834,12 @@ impl File {
         self.path.clone()
     }
 
-    pub fn abs_path(&self, cx: &AppContext) -> PathBuf {
-        self.worktree.read(cx).abs_path.join(&self.path)
-    }
-
-    pub fn select_language(&self, cx: &AppContext) -> Option<Arc<Language>> {
+    pub fn full_path(&self, cx: &AppContext) -> PathBuf {
         let worktree = self.worktree.read(cx);
         let mut full_path = PathBuf::new();
         full_path.push(worktree.root_name());
         full_path.push(&self.path);
-        let languages = match self.worktree.read(cx) {
-            Worktree::Local(worktree) => &worktree.languages,
-            Worktree::Remote(worktree) => &worktree.languages,
-        };
-        languages.select_language(&full_path).cloned()
+        full_path
     }
 
     /// Returns the last component of this handle's absolute path. If this handle refers to the root