Add folding of enumerate items

[PKU-lzk]

The feature request is for providing a folding for enumerate items.

Here is a minimum example using enumerate env.

\documentclass[a4paper]{article}
\usepackage{enumitem}
\begin{document}
\begin{enumerate}[fullwidth, itemindent=0pt, label=\textbf{\arabic*.}]
	\item First.
	\item Second.
	
	  second.
		\begin{enumerate}[label=(\arabic*)]
			\item 1.
			\item
				2.
		\end{enumerate}
	\item
	
		Third.
\end{enumerate}
\end{document}

Would it be possible to fold it like this:

\documentclass[a4paper]{article}
\usepackage{enumitem}
\begin{document}
\begin{enumerate}[fullwidth, itemindent=0pt, label=\textbf{\arabic*.}]
	\item First.
	\item Second.-----------------------------------------------------------------------------------------
		\begin{enumerate}[label=(\arabic*)]
			\item 1.
			\item---------------------------------------------------------------------------------
		\end{enumerate}
	\item-------------------------------------------------------------------------------------------------
\end{enumerate}
\end{document}

Thanks!

[lervag]

Anything is possible, but I'm not sure I agree that the first fold should stop at the \begin{enumerate} part. So, I think this is a better picture of what could be added:

All folds open                Fold level 2 closed           Fold level 1 closed
----------------------------------------------------------------------------------------
0 \begin{enumerate}[...]      0 \begin{enumerate}[...]      0 \begin{enumerate}[...]
0   \item First.              0   \item First.              0   \item First.
1   \item Second.             1   \item Second.             1   \item Second. ----------
1                             1                             1   \item ------------------
1     second.                 1     second.                 0 \end{enumerate}
1     \begin{enumerate}[...]  1     \begin{enumerate}[...]
1             \item 1.        1             \item 1.
2             \item           2             \item --------
2                     2.      1     \end{enumerate}
1     \end{enumerate}         1   \item
1   \item                     1
1                             1     Third.
1     Third.                  0 \end{enumerate}
0 \end{enumerate}

Here we ignore the folds from the environments. The point is that each \item starts a fold the continues to the next \item or until \end{enumerate|itemize}. The numbers indicate the fold levels.

What do you think?

[PKU-lzk]

You are right! This one is better.

[lervag]

Ok, this was harder than I thought. But I've pushed a branch with the feature now. I think it might be ready for merge, but it would be nice if you could test it. Something like this:

cd path/to/vimtex
git pull
git checkout feat/fold-items

[PKU-lzk]

It works in most cases, but it doesn't fold as I expected in this case:

All folds open                                        All Folds closed
------------------------------------------------------------------------------------
\begin{enumerate}[...]                                \begin{enumerate}[...]--------
  \item A                                               \item D
    \begin{enumerate}[...]                            \end{enumerate}
      \item B
    \end{enumerate}
    C
  \item D
\end{enumerate}

[lervag]

I think it's fixed now. Can you test again?

[lervag]

By the way, I rebased and cleaned up, so you have to force pull the branch. Or delete the branch and fetch a fresh version of it. Let me know if you need help with it!

[lervag]

I think this works as expected, so I've merged it with master. If you find any more bugs, let me know, I'll fix them asap.