Enable copy and paste in vim mode

crates/vim/src/utils.rs

@@ -0,0 +1,26 @@
+use editor::{ClipboardSelection, Editor};
+use gpui::{ClipboardItem, MutableAppContext};
+use language::Point;
+
+pub fn copy_selections_content(editor: &mut Editor, linewise: bool, cx: &mut MutableAppContext) {
+    let selections = editor.selections.all::<Point>(cx);
+    let buffer = editor.buffer().read(cx).snapshot(cx);
+    let mut text = String::new();
+    let mut clipboard_selections = Vec::with_capacity(selections.len());
+    {
+        for selection in selections.iter() {
+            let initial_len = text.len();
+            let start = selection.start;
+            let end = selection.end;
+            for chunk in buffer.text_for_range(start..end) {
+                text.push_str(chunk);
+            }
+            clipboard_selections.push(ClipboardSelection {
+                len: text.len() - initial_len,
+                is_entire_line: linewise,
+            });
+        }
+    }
+
+    cx.write_to_clipboard(ClipboardItem::new(text).with_metadata(clipboard_selections));
+}