vim: Surround in visual mode (#13347)

Adds support for surrounding text in visual/visual-line/visual-block
mode by re-using the `AddSurrounds` operator. There is no default
binding though so the user must follow the instructions to enable it.

Note that the behaviour varies slightly for the visual-line and
visual-block modes. In visual-line mode the surrounds are placed on
separate lines (the vim-surround extension also indents the contents but
I opted not to as that behaviour is less important with the use of code
formatters). In visual-block mode each of the selected regions is
surrounded and the cursor returns to the beginning of the selection
after the action is complete.

Release Notes:

- Added action to surround text in visual mode (no default binding).

Fixes #13122

crates/vim/src/vim.rs

@@ -39,7 +39,7 @@ use serde_derive::Serialize;
 use settings::{update_settings_file, Settings, SettingsSources, SettingsStore};
 use state::{EditorState, Mode, Operator, RecordedSelection, Register, WorkspaceState};
 use std::{ops::Range, sync::Arc};
-use surrounds::{add_surrounds, change_surrounds, delete_surrounds};
+use surrounds::{add_surrounds, change_surrounds, delete_surrounds, SurroundsType};
 use ui::BorrowAppContext;
 use visual::{visual_block_motion, visual_replace};
 use workspace::{self, Workspace};
@@ -861,6 +861,10 @@ impl Vim {
                         Vim::update(cx, |vim, cx| vim.clear_operator(cx));
                     }
                 }
+                Mode::Visual | Mode::VisualLine | Mode::VisualBlock => {
+                    add_surrounds(text, SurroundsType::Selection, cx);
+                    Vim::update(cx, |vim, cx| vim.clear_operator(cx));
+                }
                 _ => Vim::update(cx, |vim, cx| vim.clear_operator(cx)),
             },
             Some(Operator::ChangeSurrounds { target }) => match Vim::read(cx).state().mode {