How to robustly capture the contents of nested lists to turn them into mindmaps ?
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JeT 
**My question**

The same way it's often (always?) a good idea to turn a `table` into a graph, I'd like to be able to simply turn (long) lists into `mindmaps` by wrapping these lists into a `mymindmap` environment.

**Example**

![image.png](/image?hash=ed58de3d7395ff47ba648def223dc3abe92ebd9404cf8aa8c65232efa92e3a20)

vs same content in this long nested list (I could have splitted into 3 frames, but for the sake of the example, I left it as a long list).

![image.png](/image?hash=eb11f8fd686d4416e27f2269e3d8642d8b605b26821d7202652c1569a3cc25b2)

![image.png](/image?hash=a3c797cea6cf753f20fa80971d30cfb879292beb27a41b066b9b08a63007c9ca)

**Context and previous building blocks**

Long `itemize` and `enumerate` are boring, especially on `beamer`. 

Mindmaps are great, but I find them difficult to include cause of the nested `{}` that take some time to debug.

1. Thanks to this (canonical IMO) [answer](https://topanswers.xyz/tex?q=1808), the organization of mindmaps is automatically handled and leads to regular growing cycle, easy to parameter with `pgfkeys`.

2. Thanks to [this answer](https://tex.stackexchange.com/questions/542498/mindmap-attributes-grow-cycle-level-1-etc-in-a-mymindmap-style), it's easy to create your own style for the mindmap.

```
%----------------------------------------------
% Style of the mindmap
%----------------------------------------------
\tikzset{mymmstyle/.style 2 args={
	text width=1.5cm,
	align=flush center,
	mindmap,
	Julien growth,
	mmap/overall rotation=\pgfkeysvalueof{/tikz/mmap/rotation},
	mmap/sign	= 1,
	mmap/name	= semicirc,	%<- you need unique names if you want to use several mindmaps
	every node/.style={
		concept,
		circular drop shadow, 
		execute at begin node=\hskip0pt,
		text=#2,
	},	
	node font=\sffamily,
	nodes={concept},
	concept color=#1,
	root concept/.append style={
		ball color=#1, 
		line width=1.5ex,
		text=#2,
		font=\LARGE\bfseries\scshape,
		minimum size=3.25cm, 
		text width=3.25cm
	},                   
	level 1/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 1},%
		font=\large,%
		minimum size=2.5cm,%
		text width=2.0cm, 
		fill= #1!70,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(1)-1),1)}
	},
	level 2/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 2},%
		font=\normalsize,%
		minimum size=1.5cm,%
		text width=1.5cm, 
		fill= #1!50,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(2)-1),1)}
	},
	level 3/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 3},
		font=\normalsize,
		minimum size=1.5cm,
		text width=1.5cm, 
		fill= #1!30,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(3)-1),1)},
		offset angle=\pgfkeysvalueof{/tikz/mmap/offset level 3}
	},
	level 4/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 4},
		font=\normalsize,
		minimum size=1cm,
		text width=1cm, 
		fill= #1!30,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(4)-1),1)},
		offset angle=\pgfkeysvalueof{/tikz/mmap/offset level 4}
	},
}
}
```

**What could this environment look like ?**

To turn lists into mindmaps, I'd like to create a simple `environment` that could (open to any alternative) look like this

```
\begin{mymindmap}[mymmstyle={node color}{text color}]{Root concept}
% easy to comment/uncomment

\begin{itemize}
	\item level 1
	      \begin{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      \end{itemize}
	\item Pricing
	      \begin{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      	\item level 2
	      	      \begin{itemize}
	      	      	\item level 3
	      	      	\item level 3
	      	      	\item level 3
	      	      \end{itemize}
	      \end{itemize}	      
\end{itemize}
\end{mymindmap}

```

**MWE**

```

\documentclass{beamer}
\usepackage{tikz}

\usetikzlibrary{mindmap,shadows}
\definecolor{myuniversity}{RGB}{36, 0, 132}	

%--------------------
% GrowCycle
% Till level 5
%--------------------
\makeatletter
\newif\ifmmap@debug
\mmap@debugfalse
\newcommand{\mmap@debug@message}[1]{\ifmmap@debug
	\typeout{#1}%
	\fi}
\def\tikz@mmap@store@aux#1#2{%
\immediate\write\@mainaux{\string\expandafter\xdef\noexpand\csname pgfk@/tikz/mmap/\pgfkeysvalueof{/tikz/mmap/name}/#1\string\endcsname{#2}}}%
\def\tikz@mmap@get@from@aux#1#2{%
\ifcsname pgfk@/tikz/mmap/\pgfkeysvalueof{/tikz/mmap/name}/#1\endcsname
\edef#2{\csname pgfk@/tikz/mmap/\pgfkeysvalueof{/tikz/mmap/name}/#1\endcsname}%
\else
\edef#2{0}%
\fi
}	
\pgfmathdeclarefunction{MMapNodesAtLevel}{1}{%
\tikz@mmap@get@from@aux{n-\@roman{#1}}{\pgfmathresult}}
\newcount\tikzcountchildi
\newcount\tikzcountchildii
\newcount\tikzcountchildiii
\newcount\tikzcountchildiv
\newcount\tikzcountchildv
\newcount\tikzcountchildvi
\tikzcountchildi=0
\tikzcountchildii=0
\tikzcountchildiii=0
\tikzcountchildiv=0
\tikzcountchildv=0
\tikzcountchildvi=0
\tikzset{Julien growth/.style={%
	growth function=\tikz@grow@Julien,
	mmap/initialize counts,
	/tikz/execute at end scope={%
	   \tikz@mmap@store@aux{n-i}{\the\tikzcountchildi}%
	   \tikz@mmap@store@aux{n-ii}{\the\tikzcountchildii}%
	   \tikz@mmap@store@aux{n-iii}{\the\tikzcountchildiii}%
	   \tikz@mmap@store@aux{n-iv}{\the\tikzcountchildiv}%
	   \tikz@mmap@store@aux{n-v}{\the\tikzcountchildv}%
	   \tikz@mmap@store@aux{n-vi}{\the\tikzcountchildvi}%
	}},
	mmap/.cd,
	initialize counts/.code={\global\tikzcountchildi=0%
		\global\tikzcountchildii=0%
		\global\tikzcountchildiii=0%
		\global\tikzcountchildiv=0%
		\global\tikzcountchildv=0%
		\global\tikzcountchildvi=0%
	}
}


\def\tikz@grow@Julien{%
	\pgftransformreset% 
	\pgftransformshift{\pgfpoint{\pgfkeysvalueof{/tikz/mmap/overall xshift}}%
		{\pgfkeysvalueof{/tikz/mmap/overall yshift}}}%
	\ifcase\tikztreelevel 
	\or
		\pgfmathsetmacro{\pgfutil@tempb}{\pgfkeysvalueof{/tikz/mmap/overall rotation}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/offset angle}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/sibling angle}*\tikzcountchildi}%
		\global\advance\tikzcountchildi by1\relax%
	\or
		\pgfmathsetmacro{\pgfutil@tempb}{\pgfkeysvalueof{/tikz/mmap/overall rotation}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/offset angle}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/sibling angle}*\tikzcountchildii}%
		\global\advance\tikzcountchildii by1\relax%
	\or
		\pgfmathsetmacro{\pgfutil@tempb}{\pgfkeysvalueof{/tikz/mmap/overall rotation}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/offset angle}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/sibling angle}*\tikzcountchildiii}%
		\global\advance\tikzcountchildiii by1\relax%
	\or
		\pgfmathsetmacro{\pgfutil@tempb}{\pgfkeysvalueof{/tikz/mmap/overall rotation}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/offset angle}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/sibling angle}*\tikzcountchildiv}%
		\global\advance\tikzcountchildiv by1\relax%
	\or
		\pgfmathsetmacro{\pgfutil@tempb}{\pgfkeysvalueof{/tikz/mmap/overall rotation}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/offset angle}%
			+\pgfkeysvalueof{/tikz/mmap/sign}*\pgfkeysvalueof{/tikz/sibling angle}*\tikzcountchildv}%
		\global\advance\tikzcountchildv by1\relax%
	\fi
	\mmap@debug@message{level=\the\tikztreelevel,%
		\the\tikzcountchildi,\the\tikzcountchildii,\the\tikzcountchildiii,
		rotation=\pgfutil@tempb,sibling angle=\pgfkeysvalueof{/tikz/sibling angle}}%
	\pgftransformrotate{\pgfutil@tempb}%
	\pgftransformxshift{\the\tikzleveldistance}%
}
\makeatother
				
				
\tikzset{%
mmap/.cd,
    name/.initial=undef,
    overall rotation/.initial 	= 0,
    overall xshift/.initial 	= 0pt,
    overall yshift/.initial 	= 0pt,
    sign/.initial 				= 1,				
    child weight/.initial 		= 0.5,		
    rotation/.initial 			= 0.5,
    shape angle/.initial 		= 180,		
    distance to 1/.initial 		= 4.5cm,		
    distance to 2/.initial 		= 7.5cm,		
    distance to 3/.initial 		= 10cm,		
    distance to 4/.initial 		= 12cm,		
    distance to 5/.initial 		= 14cm,		
    offset level 3/.initial 	= 0,		
/tikz/.cd,
	offset angle/.initial=0, 
    Xshift/.style={xshift=#1,mmap/overall xshift=#1},
    Yshift/.style={yshift=#1,mmap/overall yshift=#1},
%    branch color/.style={
%        concept color=#1!80,
%        ball color=#1!50,
%        every child/.append style={concept color=#1!50},
%    },
}


%----------------------------------------------
% Style of the mindmap
%----------------------------------------------
\tikzset{mymmstyle/.style 2 args={
	text width=1.5cm,
	align=flush center,
	mindmap,
	Julien growth,
	mmap/overall rotation=\pgfkeysvalueof{/tikz/mmap/rotation},
	mmap/sign	= 1,
	mmap/name	= semicirc,	%<- you need unique names if you want to use several mindmaps
	every node/.style={
		concept,
		circular drop shadow, 
		execute at begin node=\hskip0pt,
		text=#2,
	},	
	node font=\sffamily,
	nodes={concept},
	concept color=#1,
	root concept/.append style={
		ball color=#1, 
		line width=1.5ex,
		text=#2,
		font=\LARGE\bfseries\scshape,
		minimum size=3.25cm, 
		text width=3.25cm
	},                   
	level 1/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 1},%
		font=\large,%
		minimum size=2.5cm,%
		text width=2.0cm, 
		fill= #1!70,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(1)-1),1)}
	},
	level 2/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 2},%
		font=\normalsize,%
		minimum size=1.5cm,%
		text width=1.5cm, 
		fill= #1!50,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(2)-1),1)}
	},
	level 3/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 3},
		font=\normalsize,
		minimum size=1.5cm,
		text width=1.5cm, 
		fill= #1!30,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(3)-1),1)},
		offset angle=\pgfkeysvalueof{/tikz/mmap/offset level 3}
	},
	level 4/.style={%
		level distance=\pgfkeysvalueof{/tikz/mmap/distance to 4},
		font=\normalsize,
		minimum size=1cm,
		text width=1cm, 
		fill= #1!30,
		sibling angle/.evaluated={\pgfkeysvalueof{/tikz/mmap/shape angle}/max((MMapNodesAtLevel(4)-1),1)},
		offset angle=\pgfkeysvalueof{/tikz/mmap/offset level 4}
	},
}
}


%\newcommand{\MyMindMap}[2][mymmstyle={blue}{white}]{
%\begin{tikzpicture}[#1]	
%%	\begin{scope}[#1]	
%%	\input{#2}
%{#2}
%%	\end{scope}
%\end{tikzpicture}
}


\begin{document}

\begin{frame}
	\frametitle{Audience catching mindmap}

	
	\resizebox{\linewidth}{!}{
		\begin{tikzpicture}
			\begin{scope}[mymmstyle={orange}{orange!50!black}]
				
				\node[root concept] {Root} 
				child {node {level 1}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}
						child {node {level 3}}				
					}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}
					}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}
						child {node {level 3}}
					}
				}
				child {node {level 1}
					child {node {level 2}}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}		
					}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}		
					}				
				}
				child {node {level 1}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}
					}
					child {node {level 2}
						child {node {level 3}}
						child {node {level 3}}
					}
					child {node {level 2}
						child {node {level 3}}    
						child {node {level 3}}    
					}
				}
				;							
			\end{scope}
		\end{tikzpicture}
	}
\end{frame}

\begin{frame}[allowframebreaks]
	\frametitle{Audience killer list}
		
	\begin{itemize}
		\item level 1
		      \begin{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3 
		      	      	\item level 3 
		      	      \end{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3 
		      	      	\item level 3 
		      	      	\item level 3 
		      	      \end{itemize}
		      \end{itemize}
		\item level 1
		      \begin{itemize}
		      	\item level 2
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      \end{itemize}
		\item level 1
		      \begin{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      	\item level 2
		      	      \begin{itemize}
		      	      	\item level 3
		      	      	\item level 3
		      	      \end{itemize}
		      \end{itemize}
	\end{itemize}
		
\end{frame}	

\end{document}
```
Top Answer
user 3.14159 
This is not an answer to the question in the strict sense, but a suggestion to try an alternative approach. Rather than trying to convert a bunch of `itemize` environments and `\item`s into a mindmap one can convert the contents of a mindmap to other formats, such as `itemize`d lists. IMHO the Ti*k*Z approach is cleaner in that it specifies the relations and hierarchies, and allows the user to control the details via keys. Although I did not try this out explicitly, I'd think that one could then convert the same input to other formats such as `forest` trees.

Since the codes shown here are already extensive, I just show a basic example. The parser is shamelessly stolen from the `calc` library of Ti*k*Z, one could also use the parser of the `\path` command if one wants to make it a bit richer. 
```
\documentclass{article}
\usepackage{environ}
\usepackage{pgf}
\makeatletter
\long\def\pgf@itemize@parse{% 
\pgfutil@ifnextchar;{% 
% Ok, we found the end... 
\pgf@itemize@end% 
} 
{\pgfutil@ifnextchar c{% 
% Ok, we found a child
\pgf@itemize@c% 
}{% 
\pgfutil@ifnextchar n{% 
% Ok, we found a node
\pgf@itemize@n% 
}{% 
}%
}%
}%
}%
% 
\def\pgf@itemize@end;{% 
}% 
\long\def\pgf@itemize@n node#1{% 
\item #1%
\expandafter\pgf@itemize@parse
}% 
\long\def\pgf@itemize@c child#1{% 
\begin{itemize}%
\expandafter\pgf@itemize@parse#1%
\end{itemize}%
\expandafter\pgf@itemize@parse
}% 
\NewEnviron{pgfitemize}{%
\expandafter\pgf@itemize@parse\BODY;}
\makeatother
\begin{document}
\begin{pgfitemize}
			child {node {level 1}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}
					child {node {level 3}}				
				}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}
				}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}
					child {node {level 3}}
				}
			}
			child {node {level 1}
				child {node {level 2}}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}		
				}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}		
				}				
			}
			child {node {level 1}
				child {node {level 2}
					child {node {level 3}}
					child {node {level 3}}
				}
				child {node {level 2}
					child {node {level 3}}
					child {node {level $2+1$}}
				}
				child {node {level 2}
					child {node {level \textbf{3}}}    
					child {node {level \pgfmathparse{3}\pgfmathresult}}    
				}
			}
\end{pgfitemize}
\end{document}
```
![Screen Shot 2021-06-07 at 1.02.52 PM.png](/image?hash=5459a70e939305670e675666d2cacffbd6db1e8e6c7a09e5a29be3eb7782fd15)
As you can see, you only have to sandwich the contents of the mindmap in 
```
\begin{pgfitemize}
...
\end{pgfitemize}
```
to get the list. Notice that in the end I added "non-expandable" commands to show that this is at least somewhat robust.

In general I'd think that allowing for such arguably more "semantic" input may make a lot of sense when dealing with documents that may eventually become parts of, say, `beamer` presentations.
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