Implement bulk buffer closing commands (#1677)

* Implement buffer-close-all

* Implement buffer-close-others

* Refactor all buffer close variants to use shared logic

* Fix clippy lint

* Docgen for new commands

* Shorten error message for attempting to close buffers that don't exist

* Refactor shared buffer methods to pass only editor, not whole compositor

* Switch signature of bulk buffer closing to use slice of DocumentIds

Addresses feedback that accepting an IntoIterator implementor is too
much for an internal. Also possibly saves some moving?

book/src/generated/typable-cmd.md

@@ -5,6 +5,10 @@
 | `:open`, `:o` | Open a file from disk into the current view. |
 | `:buffer-close`, `:bc`, `:bclose` | Close the current buffer. |
 | `:buffer-close!`, `:bc!`, `:bclose!` | Close the current buffer forcefully (ignoring unsaved changes). |
+| `:buffer-close-others`, `:bco`, `:bcloseother` | Close all buffers but the currently focused one. |
+| `:buffer-close-others!`, `:bco!`, `:bcloseother!` | Close all buffers but the currently focused one. |
+| `:buffer-close-all`, `:bca`, `:bcloseall` | Close all buffers, without quiting. |
+| `:buffer-close-all!`, `:bca!`, `:bcloseall!` | Close all buffers forcefully (ignoring unsaved changes), without quiting. |
 | `:write`, `:w` | Write changes to disk. Accepts an optional path (:write some/path.txt) |
 | `:new`, `:n` | Create a new scratch buffer. |
 | `:format`, `:fmt` | Format the file using the LSP formatter. |

helix-term/src/commands.rs

@@ -2077,18 +2077,27 @@ pub mod cmd {
         Ok(())
     }
 
-    fn buffer_close_impl(
+    fn buffer_close_by_ids_impl(
         editor: &mut Editor,
-        args: &[Cow<str>],
+        doc_ids: &[DocumentId],
         force: bool,
     ) -> anyhow::Result<()> {
+        for &doc_id in doc_ids {
+            editor.close_document(doc_id, force)?;
+        }
+
+        Ok(())
+    }
+
+    fn buffer_gather_paths_impl(editor: &mut Editor, args: &[Cow<str>]) -> Vec<DocumentId> {
+        // No arguments implies current document
         if args.is_empty() {
             let doc_id = view!(editor).doc;
-            editor.close_document(doc_id, force)?;
-            return Ok(());
+            return vec![doc_id];
         }
 
         let mut nonexistent_buffers = vec![];
+        let mut document_ids = vec![];
         for arg in args {
             let doc_id = editor.documents().find_map(|doc| {
                 let arg_path = Some(Path::new(arg.as_ref()));
@@ -2102,21 +2111,19 @@ pub mod cmd {
             });
 
             match doc_id {
-                Some(doc_id) => editor.close_document(doc_id, force)?,
-                None => nonexistent_buffers.push(arg),
+                Some(doc_id) => document_ids.push(doc_id),
+                None => nonexistent_buffers.push(format!("'{}'", arg)),
             }
         }
 
-        let nonexistent_buffers: Vec<_> = nonexistent_buffers
-            .into_iter()
-            .map(|str| format!("'{}'", str))
-            .collect();
+        if !nonexistent_buffers.is_empty() {
             editor.set_error(format!(
-            "couldn't close buffer(s) {}: does not exist",
+                "cannot close non-existent buffers: {}",
                 nonexistent_buffers.join(", ")
             ));
+        }
 
-        Ok(())
+        document_ids
     }
 
     fn buffer_close(
@@ -2124,7 +2131,8 @@ pub mod cmd {
         args: &[Cow<str>],
         _event: PromptEvent,
     ) -> anyhow::Result<()> {
-        buffer_close_impl(cx.editor, args, false)
+        let document_ids = buffer_gather_paths_impl(cx.editor, args);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, false)
     }
 
     fn force_buffer_close(
@@ -2132,7 +2140,57 @@ pub mod cmd {
         args: &[Cow<str>],
         _event: PromptEvent,
     ) -> anyhow::Result<()> {
-        buffer_close_impl(cx.editor, args, true)
+        let document_ids = buffer_gather_paths_impl(cx.editor, args);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, true)
+    }
+
+    fn buffer_gather_others_impl(editor: &mut Editor) -> Vec<DocumentId> {
+        let current_document = &doc!(editor).id();
+        editor
+            .documents()
+            .map(|doc| doc.id())
+            .filter(|doc_id| doc_id != current_document)
+            .collect()
+    }
+
+    fn buffer_close_others(
+        cx: &mut compositor::Context,
+        _args: &[Cow<str>],
+        _event: PromptEvent,
+    ) -> anyhow::Result<()> {
+        let document_ids = buffer_gather_others_impl(cx.editor);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, false)
+    }
+
+    fn force_buffer_close_others(
+        cx: &mut compositor::Context,
+        _args: &[Cow<str>],
+        _event: PromptEvent,
+    ) -> anyhow::Result<()> {
+        let document_ids = buffer_gather_others_impl(cx.editor);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, true)
+    }
+
+    fn buffer_gather_all_impl(editor: &mut Editor) -> Vec<DocumentId> {
+        editor.documents().map(|doc| doc.id()).collect()
+    }
+
+    fn buffer_close_all(
+        cx: &mut compositor::Context,
+        _args: &[Cow<str>],
+        _event: PromptEvent,
+    ) -> anyhow::Result<()> {
+        let document_ids = buffer_gather_all_impl(cx.editor);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, false)
+    }
+
+    fn force_buffer_close_all(
+        cx: &mut compositor::Context,
+        _args: &[Cow<str>],
+        _event: PromptEvent,
+    ) -> anyhow::Result<()> {
+        let document_ids = buffer_gather_all_impl(cx.editor);
+        buffer_close_by_ids_impl(cx.editor, &document_ids, true)
     }
 
     fn write_impl(cx: &mut compositor::Context, path: Option<&Cow<str>>) -> anyhow::Result<()> {
@@ -2970,6 +3028,34 @@ pub mod cmd {
             fun: force_buffer_close,
           completer: Some(completers::buffer),
         },
+        TypableCommand {
+            name: "buffer-close-others",
+            aliases: &["bco", "bcloseother"],
+            doc: "Close all buffers but the currently focused one.",
+            fun: buffer_close_others,
+            completer: None,
+        },
+        TypableCommand {
+            name: "buffer-close-others!",
+            aliases: &["bco!", "bcloseother!"],
+            doc: "Close all buffers but the currently focused one.",
+            fun: force_buffer_close_others,
+            completer: None,
+        },
+        TypableCommand {
+            name: "buffer-close-all",
+            aliases: &["bca", "bcloseall"],
+            doc: "Close all buffers, without quiting.",
+            fun: buffer_close_all,
+            completer: None,
+        },
+        TypableCommand {
+            name: "buffer-close-all!",
+            aliases: &["bca!", "bcloseall!"],
+            doc: "Close all buffers forcefully (ignoring unsaved changes), without quiting.",
+            fun: force_buffer_close_all,
+            completer: None,
+        },
         TypableCommand {
             name: "write",
             aliases: &["w"],