Function expandSelection

src/codemirror.js:12231–12253

(cm, start, end)

                           'visualBlock': vim.visualBlock};
    }
    function expandSelection(cm, start, end) {
      var sel = cm.state.vim.sel;
      var head = sel.head;
      var anchor = sel.anchor;
      var tmp;
      if (cursorIsBefore(end, start)) {
        tmp = end;
        end = start;
        start = tmp;
      }
      if (cursorIsBefore(head, anchor)) {
        head = cursorMin(start, head);
        anchor = cursorMax(anchor, end);
      } else {
        anchor = cursorMin(start, anchor);
        head = cursorMax(head, end);
        head = offsetCursor(head, 0, -1);
        if (head.ch == -1 && head.line != cm.firstLine()) {
          head = Pos(head.line - 1, lineLength(cm, head.line - 1));
        }
      }
      return [anchor, head];
    }
    /**
     * Updates the CodeMirror selection to match the provided vim selection.
     * If no arguments are given, it uses the current vim selection state.