add wonly -- window only (#1057)

* add wonly

* Update book/src/keymap.md

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

* add `wonly` to space w mode too

* remove the TODO

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

book/src/keymap.md

@@ -194,6 +194,7 @@ This layer is similar to vim keybindings as kakoune does not support window.
 | `k`, `Ctrl-k`, `up`    | Move to split above            | `jump_view_up`    |
 | `l`, `Ctrl-l`, `right` | Move to right split            | `jump_view_right` |
 | `q`, `Ctrl-q`          | Close current window           | `wclose`          |
+| `o`, `Ctrl-o`          | Only keep the current window, closing all the others            | `wonly`           |
 
 #### Space mode
 

helix-term/src/commands.rs

@@ -320,6 +320,7 @@ impl Command {
         hsplit, "Horizontal bottom split",
         vsplit, "Vertical right split",
         wclose, "Close window",
+        wonly, "Current window only",
         select_register, "Select register",
         align_view_middle, "Align view middle",
         align_view_top, "Align view top",
@@ -4723,6 +4724,20 @@ fn wclose(cx: &mut Context) {
     cx.editor.close(view_id, /* close_buffer */ false);
 }
 
+fn wonly(cx: &mut Context) {
+    let views = cx
+        .editor
+        .tree
+        .views()
+        .map(|(v, focus)| (v.id, focus))
+        .collect::<Vec<_>>();
+    for (view_id, focus) in views {
+        if !focus {
+            cx.editor.close(view_id, /* close_buffer */ false);
+        }
+    }
+}
+
 fn select_register(cx: &mut Context) {
     cx.on_next_key(move |cx, event| {
         if let Some(ch) = event.char() {

helix-term/src/keymap.rs

@@ -583,6 +583,7 @@ impl Default for Keymaps {
                 "C-s" | "s" => hsplit,
                 "C-v" | "v" => vsplit,
                 "C-q" | "q" => wclose,
+                "C-o" | "o" => wonly,
                 "C-h" | "h" | "left" => jump_view_left,
                 "C-j" | "j" | "down" => jump_view_down,
                 "C-k" | "k" | "up" => jump_view_up,
@@ -609,6 +610,7 @@ impl Default for Keymaps {
                     "C-s" | "s" => hsplit,
                     "C-v" | "v" => vsplit,
                     "C-q" | "q" => wclose,
+                    "C-o" | "o" => wonly,
                     "C-h" | "h" | "left" => jump_view_left,
                     "C-j" | "j" | "down" => jump_view_down,
                     "C-k" | "k" | "up" => jump_view_up,