Enumitem：缩进列表，新段落不缩进

Question

我想创建一个缩进列表，其中列表内的新（非逐项）段落根本不缩进（也就是说，它们与正文的左边距对齐。参见下图）。

我正在使用enumitem具有以下选项的软件包：

labelsep=8pt,                           
labelindent=0.5\parindent,               
itemindent=0pt,
leftmargin=*,                         
listparindent=-\leftmargin

（* 应该用于根据其他参数和自动计算的标签宽度计算值\leftmargin）。但是，结果并不如预期（请参阅下面的 MWE）。如果我改为设置

leftmargin=3cm                         
listparindent=-\leftmargin

它按预期工作（但我不想将左边距设置为特定值，我想要的是固定的\labelindent和\labelsep）。插入

\noindent\hskip-\leftmargin

在有问题的段落开头也有效，但确实不太系统。我应该如何设置选项enumerate才能达到我想要的效果？

平均能量损失

\documentclass{article}
\usepackage{enumitem}
\setlist[enumerate]{%
labelsep=8pt,%                           
labelindent=0.5\parindent,%               
itemindent=0pt,%
leftmargin=*,%                          
listparindent=-\leftmargin% 
}

\begin{document}
A normal paragraph of text just to show where 
the left margin lies, for comparison. New paragraphs 
inside enumerate should start at that left margin.

\begin{enumerate}[label=Case \arabic*:]
\item By setting the enumerate options in a 
(I think) sensible manner, I don't achieve what I want 

This paragraph shouldn't be indented at all!

\item I want to set the options so that new paragraphs 
behave like the following one

\noindent\hskip-\leftmargin 
This paragraph is indeed not indented at all!
\end{enumerate}

\begin{enumerate}[resume*,leftmargin=3cm,listparindent=-\leftmargin]
\item Setting a specific value for leftmargin also works\dots

But this is not what I want :-(
\end{enumerate}
\end{document}

我会避免在所有enumerate环境中这样做；为此定义一个新列表。

Answer 1

我不确定你为什么要这样做。不过，方法如下：

\documentclass{article}
\usepackage{showframe}
\usepackage{enumitem}

\setlist[enumerate]{
  labelsep=8pt,
  labelindent=0.5\parindent,
  itemindent=0pt,
  leftmargin=*,
  before=\setlength{\listparindent}{-\leftmargin},
}

\begin{document}
A normal paragraph of text just to show where 
the left margin lies, for comparison. New paragraphs 
inside enumerate should start at that left margin.

\begin{enumerate}[label=Case \arabic*:]
\item By setting the enumerate options in a 
(I think) sensible manner, I don't achieve what I want

This paragraph shouldn't be indented at all!

\item I want to set the options so that new paragraphs 
behave like the following one

This paragraph is indeed not indented at all!
\end{enumerate}

\begin{enumerate}[resume*,leftmargin=3cm,listparindent=-\leftmargin]
\item Setting a specific value for leftmargin also works\dots

This is what I want.
\end{enumerate}
This is what I want. % just to show the left margin

\end{document}

\listparindent当 的值\leftmargin确定后，您必须延迟设置。

Answer 2

或者它不会简单这样（我发现第一个段落的左边距非零，并且项目中的后续段落的左边距为零看起来不太好）：

\documentclass{article}

\usepackage{enumitem}
\setlist[enumerate]{%
wide =0.5\parindent,
listparindent=0pt%
}%

\begin{document}
A normal paragraph of text just to show where the left margin lies, for comparison. New paragraphs
inside enumerate should start at that left margin.

\begin{enumerate}[label=Case \arabic*:]
\item By setting the enumerate options in a
(I think) sensible manner, I don't achieve what I want

This paragraph shouldn't be indented at all! This paragraph shouldn't be indented at all!

\item I want to set the options so that new paragraphs
behave like the following one.

This paragraph is indeed not indented at all!

\item Setting a specific value for leftmargin also works\dots

But is this what you want?
\end{enumerate}

\end{document}