Add a toggleable integrated terminal

This commit adds the `helix-integrated-terminal` crate, which
handles the PTY creation and view logic for an integrated
terminal in Helix, using the `alacritty_terminal` crate.

The terminal can be opened using the `:term` command, and the
terminal can be exited by either using `exit` in the terminal
itself, or by using `C-q` twice.

The current implementation is as a pop-up, but in the future,
we may be able to expose the terminal as a `View`, if work is
done to decouple the `Document` attachment to `View`.

Signed-off-by: Ryan Brue <[email protected]>

Author: ryanabx

Cargo.lock

@@ -4,6 +4,7 @@ members = [
   "helix-core",
   "helix-graphics",
   "helix-input",
+  "helix-terminal-view",
   "helix-view",
   "helix-term",
   "helix-tui",

Cargo.toml

@@ -678,6 +678,12 @@ impl Application {
                     return true;
                 }
             }
+            EditorEvent::TerminalEvent(event) => {
+                let needs_render = self.editor.handle_virtual_terminal_events(event).await;
+                if needs_render {
+                    self.render().await;
+                }
+            }
         }
 
         false

helix-term/src/application.rs

@@ -2,6 +2,7 @@ pub(crate) mod dap;
 pub(crate) mod lsp;
 pub(crate) mod syntax;
 pub(crate) mod typed;
+pub(crate) mod vte;
 
 pub use dap::*;
 use futures_util::FutureExt;
@@ -18,6 +19,7 @@ use tui::{
     widgets::Cell,
 };
 pub use typed::*;
+pub use vte::*;
 
 use helix_core::{
     char_idx_at_visual_offset,
@@ -616,6 +618,8 @@ impl MappableCommand {
         goto_prev_tabstop, "Goto next snippet placeholder",
         rotate_selections_first, "Make the first selection your primary one",
         rotate_selections_last, "Make the last selection your primary one",
+        toggle_terminal, "Toggle integrated terminal",
+        close_terminal, "Close active terminal",
     );
 }
 

helix-term/src/commands.rs

@@ -1402,7 +1402,7 @@ fn compute_inlay_hints_for_view(
                     };
 
                     let width = label.width();
-                    let limit = limit.get().into();
+                    let limit: usize = limit.get().into();
                     if width > limit {
                         let mut floor_boundary = 0;
                         let mut acc = 0;