How can I create a linebreak between the chapter name/number and chapter title in the ToC?

Question

I'm using the Memoir class and I'm trying to format the table of contents for a document I'm working on. Currently, the ToC arranges entries in the following way:

<<chapter name>> <<chapter number>> <<chapter title>>

E.g.

Chapter 1 Introduction
Appendix A Specifications

I'd prefer if chapter entries were formatted like this:

<<chapter name>> <<chapter number>>
<<chapter title>>

E.g.

Chapter 1
Introduction

Appendix A
Specifications

I've looked through the Memoir manual but haven't managed to find anything that's proved helpful yet.

EDIT

Added MWE and image:

\documentclass[openany]{memoir}
\usepackage{memsty}

\renewcommand*{\cftchaptername}{\chaptername\space}
\renewcommand*{\cftappendixname}{Appendix\space}

\begin{document}
\tableofcontents

\chapter{Foo}

\section{Bar}

\chapter{Baz}

\appendix
\chapter{Misc}

\end{document}

Answer 1

It is not in the manual as it might not be that common, plus it is not that easy to do with a simple configuration. Here is a suggestion

\makeatletter
\renewcommand*{\l@chapapp}[3]{%
  \ifnum \c@tocdepth >\m@ne
    \cftchapterbreak
    \vskip \cftbeforechapterskip
    {%\leftskip \cftchapterindent\relax
     \memRTLleftskip \cftchapterindent\relax
%%%     \rightskip \@tocrmarg
     \memRTLrightskip \@tocrmarg
%%%     \parfillskip -\rightskip
     \parfillskip -\memRTLrightskip
     \parindent \cftchapterindent\relax
     \@afterindenttrue
     \interlinepenalty\@M
     \leavevmode
     \let\@cftbsnum \cftchapterpresnum
     \let\@cftasnum \cftchapteraftersnum
     \let\@cftasnumb \cftchapteraftersnumb
     \def\@chapapp@head{#3}%
     \settowidth{\@tempdima}{\cftchapterfont\@chapapp@head}%
     \addtolength{\@tempdima}{\cftchapternumwidth}%
     %% this line have to be out commented
     %\advance\memRTLleftskip \@tempdima \null\nobreak\hskip -\memRTLleftskip
     {\cftchapterfont {#1}}\nobreak
     \cftchapterfillnum{#2}}
  \fi}
\makeatother
\renewcommand\cftchapteraftersnumb{\par}

We basically need \l@chapapp (which typesets chapters and appendices in the ToC) to stop increasing the left margin

---

Addition:

You can add \nopagebreak, but IMO the best solution is to make the length \cftbeforechapterskip more flexible. By default \cftbeforechapterskip is not that flexible. So I usually use something similar to

\setlength{\cftbeforechapterskip}{1.0em plus 0.2em minus 0.3em}

i.e., it can stretch some and shrink some. That leads to better results.

BTW: you might also want to use

\setlength\parskip{0pt}

in order to kill of any stretch between paragraphs over all in the document.