Initial implementation for #3325

src/Feature/Vim/Feature_Vim.re

@@ -162,13 +162,68 @@ module Effects = {
       );
     });
   };
+
+  let command = cmd => {
+    Isolinear.Effect.createWithDispatch(
+      ~name="Feature_Vim.Effect.command", dispatch => {
+      let context = Vim.Context.current();
+      let (newContext, effects) = Vim.command(~context, cmd);
+
+      dispatch(
+        ModeChanged({
+          allowAnimation: false,
+          mode: newContext.mode,
+          subMode: newContext.subMode,
+          effects,
+        }),
+      );
+    });
+  };
 };
 
-let update = (msg, model: model) => {
+let update = (~cursor, ~selections, msg, model: model) => {
   switch (msg) {
   | Command(command) =>
-    prerr_endline("COMMAND: " ++ show_command(command));
-    failwith("Done");
+    let (startLine, stopLine) =
+      switch (selections) {
+      | [visualRange, ..._] =>
+        let range = Oni_Core.VisualRange.(visualRange.range);
+        ByteRange.(range.start.line, range.stop.line);
+      | [] => BytePosition.(cursor.line, cursor.line)
+      };
+    let cmd =
+      switch (command) {
+      | MoveSelectionDownward
+      | MoveSelectionUpward => "m"
+
+      | CopySelectionDownward
+      | CopySelectionUpward => "t"
+      };
+
+    let destination =
+      EditorCoreTypes.(
+        switch (command) {
+        | MoveSelectionDownward => LineNumber.(stopLine + 1)
+        | MoveSelectionUpward => LineNumber.(startLine - 2)
+        | CopySelectionUpward => LineNumber.(startLine - 1)
+        | CopySelectionDownward => stopLine
+        }
+      );
+
+    let eff =
+      EditorCoreTypes.(
+        Effects.command(
+          Printf.sprintf(
+            "%s,%s%s%d",
+            startLine |> LineNumber.toOneBased |> string_of_int,
+            stopLine |> LineNumber.toOneBased |> string_of_int,
+            cmd,
+            destination |> LineNumber.toOneBased,
+          ),
+        )
+      );
+
+    (model, Effect(eff));
 
   | ModeChanged({allowAnimation, mode, effects, subMode}) => (
       {...model, subMode} |> handleEffects(effects),
@@ -278,14 +333,6 @@ let sub = (~buffer, ~topVisibleLine, ~bottomVisibleLine, model) => {
 module Commands = {
   open Feature_Commands.Schema;
 
-  let moveLinesDown =
-    define(
-      ~category="Editor",
-      ~title="Move lines down",
-      "editor.action.moveLinesDownAction",
-      Command(MoveSelectionDownward),
-    );
-
   let moveLinesDown =
     define(
       ~title="Move Line Down",

src/Feature/Vim/Feature_Vim.rei

@@ -57,7 +57,14 @@ type outmsg =
 
 // UPDATE
 
-let update: (msg, model) => (model, outmsg);
+let update:
+  (
+    ~cursor: BytePosition.t,
+    ~selections: list(Oni_Core.VisualRange.t),
+    msg,
+    model
+  ) =>
+  (model, outmsg);
 
 let getSearchHighlightsByLine:
   (~bufferId: int, ~line: LineNumber.t, model) => list(ByteRange.t);

src/Store/Features.re

@@ -2251,7 +2251,12 @@ let update =
 
   | Vim(msg) =>
     let previousSubMode = state.vim |> Feature_Vim.subMode;
-    let (vim, outmsg) = Feature_Vim.update(msg, state.vim);
+    let editor = state.layout |> Feature_Layout.activeEditor;
+    let cursor = editor |> Feature_Editor.Editor.getPrimaryCursorByte;
+
+    let selections = editor |> Feature_Editor.Editor.selections;
+    let (vim, outmsg) =
+      Feature_Vim.update(~cursor, ~selections, msg, state.vim);
     let newSubMode = state.vim |> Feature_Vim.subMode;
 
     // If we've switched to, or from, insert literal,

src/editor-core-types/BytePosition.re

@@ -21,3 +21,8 @@ let compare = (a, b) =>
   } else {
     LineNumber.toZeroBased(a.line) - LineNumber.toZeroBased(b.line);
   };
+
+let shiftLine = (~delta, bytePos) => {
+  ...bytePos,
+  line: LineNumber.(bytePos.line + delta),
+};

src/editor-core-types/BytePosition.rei

@@ -19,3 +19,5 @@ let (==): (t, t) => bool;
  * - a positive integer if a is greater than b
  */
 let compare: (t, t) => int;
+
+let shiftLine: (~delta: int, t) => t;