chore: Extract languages from zed crate (#8270)

- Moves languages module from `zed` into a separate crate. That way we
have less of a long pole at the end of compilation.
- Removes moot dependencies on editor/picker. This is totally harmless
and might help in the future if we decide to decouple picker from
editor.

Before:
```
Number of crates that depend on 'picker' but not on 'editor': 1
Total number of crates that depend on 'picker': 13
Total number of crates that depend on 'editor': 30
```
After:
```
Number of crates that depend on 'picker' but not on 'editor': 5
Total number of crates that depend on 'picker': 12
Total number of crates that depend on 'editor': 26
```
The more crates depend on just picker but not editor, the better in that
case.

Release Notes:

- N/A

crates/editor/src/display_map.rs

@@ -24,10 +24,7 @@ mod tab_map;
 mod wrap_map;
 
 use crate::EditorStyle;
-use crate::{
-    hover_links::InlayHighlight, movement::TextLayoutDetails, Anchor, AnchorRangeExt, InlayId,
-    MultiBuffer, MultiBufferSnapshot, ToOffset, ToPoint,
-};
+use crate::{hover_links::InlayHighlight, movement::TextLayoutDetails, InlayId};
 pub use block_map::{BlockMap, BlockPoint};
 use collections::{BTreeMap, HashMap, HashSet};
 use fold_map::FoldMap;
@@ -37,6 +34,7 @@ use language::{
     language_settings::language_settings, OffsetUtf16, Point, Subscription as BufferSubscription,
 };
 use lsp::DiagnosticSeverity;
+use multi_buffer::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset, ToPoint};
 use std::{any::TypeId, borrow::Cow, fmt::Debug, num::NonZeroU32, ops::Range, sync::Arc};
 use sum_tree::{Bias, TreeMap};
 use tab_map::TabMap;

crates/editor/src/display_map/block_map.rs

@@ -2,10 +2,11 @@ use super::{
     wrap_map::{self, WrapEdit, WrapPoint, WrapSnapshot},
     Highlights,
 };
-use crate::{Anchor, Editor, EditorStyle, ExcerptId, ExcerptRange, GutterDimensions, ToPoint as _};
+use crate::{EditorStyle, GutterDimensions};
 use collections::{Bound, HashMap, HashSet};
-use gpui::{AnyElement, ElementContext, Pixels, View};
+use gpui::{AnyElement, ElementContext, Pixels};
 use language::{BufferSnapshot, Chunk, Patch, Point};
+use multi_buffer::{Anchor, ExcerptId, ExcerptRange, ToPoint as _};
 use parking_lot::Mutex;
 use std::{
     cell::RefCell,
@@ -85,7 +86,6 @@ pub enum BlockStyle {
 
 pub struct BlockContext<'a, 'b> {
     pub context: &'b mut ElementContext<'a>,
-    pub view: View<Editor>,
     pub anchor_x: Pixels,
     pub max_width: Pixels,
     pub gutter_dimensions: &'b GutterDimensions,

crates/editor/src/display_map/fold_map.rs

@@ -2,9 +2,9 @@ use super::{
     inlay_map::{InlayBufferRows, InlayChunks, InlayEdit, InlayOffset, InlayPoint, InlaySnapshot},
     Highlights,
 };
-use crate::{Anchor, AnchorRangeExt, MultiBufferSnapshot, ToOffset};
 use gpui::{ElementId, HighlightStyle, Hsla};
 use language::{Chunk, Edit, Point, TextSummary};
+use multi_buffer::{Anchor, AnchorRangeExt, MultiBufferSnapshot, ToOffset};
 use std::{
     any::TypeId,
     cmp::{self, Ordering},

crates/editor/src/display_map/inlay_map.rs

@@ -1,8 +1,8 @@
-use crate::{Anchor, InlayId, MultiBufferSnapshot, ToOffset};
+use crate::InlayId;
 use collections::{BTreeMap, BTreeSet};
 use gpui::HighlightStyle;
 use language::{Chunk, Edit, Point, TextSummary};
-use multi_buffer::{MultiBufferChunks, MultiBufferRows};
+use multi_buffer::{Anchor, MultiBufferChunks, MultiBufferRows, MultiBufferSnapshot, ToOffset};
 use std::{
     any::TypeId,
     cmp,

crates/editor/src/display_map/tab_map.rs

@@ -2,8 +2,8 @@ use super::{
     fold_map::{self, FoldChunks, FoldEdit, FoldPoint, FoldSnapshot},
     Highlights,
 };
-use crate::MultiBufferSnapshot;
 use language::{Chunk, Point};
+use multi_buffer::MultiBufferSnapshot;
 use std::{cmp, mem, num::NonZeroU32, ops::Range};
 use sum_tree::Bias;
 

crates/editor/src/display_map/wrap_map.rs

@@ -3,10 +3,10 @@ use super::{
     tab_map::{self, TabEdit, TabPoint, TabSnapshot},
     Highlights,
 };
-use crate::MultiBufferSnapshot;
 use gpui::{AppContext, Context, Font, LineWrapper, Model, ModelContext, Pixels, Task};
 use language::{Chunk, Point};
 use lazy_static::lazy_static;
+use multi_buffer::MultiBufferSnapshot;
 use smol::future::yield_now;
 use std::{cmp, collections::VecDeque, mem, ops::Range, time::Duration};
 use sum_tree::{Bias, Cursor, SumTree};

crates/editor/src/editor.rs

@@ -122,7 +122,7 @@ use ui::{
 };
 use util::{maybe, post_inc, RangeExt, ResultExt, TryFutureExt};
 use workspace::Toast;
-use workspace::{searchable::SearchEvent, ItemNavHistory, Pane, SplitDirection, ViewId, Workspace};
+use workspace::{searchable::SearchEvent, ItemNavHistory, SplitDirection, ViewId, Workspace};
 
 use crate::hover_links::find_url;
 
@@ -356,7 +356,6 @@ type InlayBackgroundHighlight = (fn(&ThemeColors) -> Hsla, Vec<InlayHighlight>);
 ///
 /// See the [module level documentation](self) for more information.
 pub struct Editor {
-    handle: WeakView<Self>,
     focus_handle: FocusHandle,
     /// The text buffer being edited
     buffer: Model<MultiBuffer>,
@@ -1488,7 +1487,6 @@ impl Editor {
         cx.on_blur(&focus_handle, Self::handle_blur).detach();
 
         let mut this = Self {
-            handle: cx.view().downgrade(),
             focus_handle,
             buffer: buffer.clone(),
             display_map: display_map.clone(),
@@ -1686,10 +1684,6 @@ impl Editor {
         self.workspace.as_ref()?.0.upgrade()
     }
 
-    pub fn pane(&self, cx: &AppContext) -> Option<View<Pane>> {
-        self.workspace()?.read(cx).pane_for(&self.handle.upgrade()?)
-    }
-
     pub fn title<'a>(&self, cx: &'a AppContext) -> Cow<'a, str> {
         self.buffer().read(cx).title(cx)
     }

crates/editor/src/element.rs

@@ -2225,7 +2225,6 @@ impl EditorElement {
                 .width;
             let scroll_width = longest_line_width.max(max_visible_line_width) + overscroll.width;
 
-            let editor_view = cx.view().clone();
             let (scroll_width, blocks) = cx.with_element_context(|cx| {
              cx.with_element_id(Some("editor_blocks"), |cx| {
                 self.layout_blocks(
@@ -2241,7 +2240,6 @@ impl EditorElement {
                     &style,
                     &line_layouts,
                     editor,
-                    editor_view,
                     cx,
                 )
             })
@@ -2436,7 +2434,6 @@ impl EditorElement {
         style: &EditorStyle,
         line_layouts: &[LineWithInvisibles],
         editor: &mut Editor,
-        editor_view: View<Editor>,
         cx: &mut ElementContext,
     ) -> (Pixels, Vec<BlockLayout>) {
         let mut block_id = 0;
@@ -2477,7 +2474,6 @@ impl EditorElement {
                         em_width,
                         block_id,
                         max_width: scroll_width.max(text_width),
-                        view: editor_view.clone(),
                         editor_style: &self.style,
                     })
                 }