如何在必须换行时自动保持缩进级别

Question 1

一个选项是使用\linegoal（来自linegoal包）作为 es 的宽度\parbox；\linegoal扩展到该行剩余部分的尺寸：

\documentclass{article}
\usepackage{algorithm}
\usepackage[noend]{algpseudocode}
\usepackage{calc}
\usepackage{linegoal}

% A command for defining assignments within the algorithmic environment which
% supports automatic indentation when the second argument is too long to fit
% on one line
\newcommand*{\Let}[2]{\State #1 $\gets$
\parbox[t]{\linegoal}{#2\strut}}
% A \State command that supports automatic indentation when the argument's
% content is too long to fit on one line
\newcommand*{\LongState}[1]{\State
\parbox[t]{\linegoal}{#1\strut}}

\begin{document}

\begin{algorithm}
\caption{This is some testing pseudo-code showing what happens with nested long
lines}

\begin{algorithmic}[1]
  \Function{test}{$(x, y)$}
    \Let{$a$}{some math expression}
    \Let{$b$}{some very very long expression that doesn't fit on one line and is
    even longer and longer}
    \For{each $e$ in a list}
        \Let{$l(e)$}{the length of element $e$}
        \If{some condition on $l(e)$}
            \LongState{run some complex sub-routine and get the result and this
            description is very very long, long indeed...}
            \Let{$a$}{some math expression}
            \Let{$b$}{some very very long expression that doesn't fit on one
            line and is even longer and longer}
            \If{some other condition}
                \Let{$c$}{another math expression}
            \EndIf
        \EndIf
    \EndFor
  \EndFunction
\end{algorithmic}

\end{algorithm}

\end{document}

在此处输入图片描述

附录

使用XeLaTeX 和cam-thesis文档类（问题中出现了该类的链接）塔尼兹，存在问题\linegoal；标准类中不存在此问题（请参阅对问题的编辑）。快速的解决方法是使用较短的值：

\documentclass{cam-thesis}
\usepackage{algorithm}
\usepackage[noend]{algpseudocode}
\usepackage{calc}
\usepackage{linegoal}

% A command for defining assignments within the algorithmic environment which
% supports automatic indentation when the second argument is too long to fit
% on one line
\newcommand*{\Let}[2]{\State #1 $\gets$
\parbox[t]{-52,29pt+\linegoal}{#2\strut}}
% A \State command that supports automatic indentation when the argument's
% content is too long to fit on one line
\newcommand*{\LongState}[1]{\State
\parbox[t]{-52,29pt+\linegoal}{#1\strut}}

\begin{document}

\begin{algorithm}
\caption{This is some testing pseudo-code showing what happens with nested long
lines}

\begin{algorithmic}[1]
  \Function{test}{$(x, y)$}
    \Let{$a$}{some math expression}
    \Let{$b$}{some very very long expression that doesn't fit on one line and is
    even longer and longer}
    \For{each $e$ in a list}
        \Let{$l(e)$}{the length of element $e$}
        \If{some condition on $l(e)$}
            \LongState{run some complex sub-routine and get the result and this
            description is very very long, long indeed...}
            \Let{$a$}{some math expression}
            \If{some condition on $l(e)$}
            \Let{$b$}{some very very long expression that doesn't fit on one
            line and is even longer and longer}
            \If{some other condition}
                \Let{$c$}{another math expression}
              \EndIf
            \EndIf
        \EndIf
    \EndFor
  \EndFunction
\end{algorithmic}
\end{algorithm}

\end{document}

我建议您与作者/维护者联系以cam-thesis评论此问题。

Answer