算法包中的语句（\STATE）缩进

Question

这与类别无关memoir，仅与algormithmic包有关。

控制打印命令的内部命令\STATE是\ALC@it。此命令在每个algorithmic环境中都是本地定义的。\STATE只是\item列表中的，但进行了一些调整。要对此命令进行的更改是\parshape在调用之后立即添加\item。在这种情况下，适当的\parshape是

\parshape 2 \dimexpr\ALC@tlm+\labelwidth\relax
\dimexpr\textwidth-\ALC@tlm-\labelwidth\relax 
\dimexpr\ALC@tlm+\labelwidth+\continueindent\relax
\dimexpr\textwidth-\ALC@tlm-\labelwidth-\continueindent\relax

\ALC@tlm本质上保存了当前的左缩进，但需要通过进行更正\labelwidth。该命令\parshape n a_1 b_1 a_2 b_2 ...意味着第一行将具有左边距a_1和长度b_1等。nth 规范适用于段落中剩余的每一行。因此，要使右边距齐平，b_k必须是。我在下面的代码中\textwidth - a_k引入了一个新的长度；它最初设置为，但您可能希望选择不同的值。\continueindent\algorithmicindent

理想情况下，人们只想修补algorithmic环境的定义，但不幸的是etoolbox报告称它无法做到这一点。因此，下面的代码从复制了 (长) 定义algorithmic.sty，并仅修改了的定义\ALC@it，请参见后的几行%% Added three lines here %%：

示例输出

\documentclass[]{memoir}
\usepackage[utf8x]{inputenc}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{algorithmic}

\newcommand{\algorithmname}{Algorithm}
\newcommand{\listalgorithmname}{List of Algorithms}
\newlistof{listofalgorithms}{loa}{\listalgorithmname}
\newfloat{algorithm}{loa}{\algorithmname}
\newfixedcaption{\falgcaption}{algorithm}
\newlistentry{algorithm}{loa}{0}  

\usepackage{float}
\floatstyle{ruled}
\restylefloat{algorithm}

\makeatletter
\newlength{\continueindent}
\setlength{\continueindent}{\algorithmicindent}
\renewenvironment{algorithmic}[1][0]{
\setcounter{ALC@depth}{\@listdepth}%
\let\@listdepth\c@ALC@depth%
\let\@item\ALC@item%
  \newcommand{\ALC@lno}{%
\ifthenelse{\equal{\arabic{ALC@rem}}{0}}
{{\ALC@linenosize \arabic{ALC@line}\ALC@linenodelimiter}}{}%
}
\let\@listii\@listi
\let\@listiii\@listi
\let\@listiv\@listi
\let\@listv\@listi
\let\@listvi\@listi
\let\@listvii\@listi
  \newenvironment{ALC@g}{
    \begin{list}{\ALC@lno}{ \itemsep\z@ \itemindent\z@
    \listparindent\z@ \rightmargin\z@
    \topsep\z@ \partopsep\z@ \parskip\z@\parsep\z@
    \leftmargin \algorithmicindent%1em
    \addtolength{\ALC@tlm}{\leftmargin}
    }
  }
  {\end{list}}
  \newcommand{\ALC@it}{%
    \stepcounter{ALC@rem}%
    \ifthenelse{\equal{\arabic{ALC@rem}}{#1}}{\setcounter{ALC@rem}{0}}{}%
    \stepcounter{ALC@line}%
    \refstepcounter{ALC@unique}%
    \item\def\@currentlabel{\theALC@line}%
    %% Added four lines here %%
    \parshape 2 \dimexpr\ALC@tlm+\labelwidth\relax
    \dimexpr\textwidth-\ALC@tlm-\labelwidth\relax 
    \dimexpr\ALC@tlm+\labelwidth+\continueindent\relax
    \dimexpr\textwidth-\ALC@tlm-\labelwidth-\continueindent\relax
    %% End of added material
  }
  \newcommand{\ALC@com}[1]{\ifthenelse{\equal{##1}{default}}%
{}{\ \algorithmiccomment{##1}}}
  \newcommand{\REQUIRE}{\item[\algorithmicrequire]}
  \newcommand{\ENSURE}{\item[\algorithmicensure]}
  \newcommand{\PRINT}{\ALC@it\algorithmicprint{} \ }
  \newcommand{\RETURN}{\ALC@it\algorithmicreturn{} \ }
  \newcommand{\TRUE}{\algorithmictrue{}}
  \newcommand{\FALSE}{\algorithmicfalse{}}
  \newcommand{\AND}{\algorithmicand{} }
  \newcommand{\OR}{\algorithmicor{} }
  \newcommand{\XOR}{\algorithmicxor{} }
  \newcommand{\NOT}{\algorithmicnot{} }
  \newcommand{\TO}{\algorithmicto{} }
  \newcommand{\STATE}{\ALC@it}
  \newcommand{\STMT}{\ALC@it}
  \newcommand{\COMMENT}[1]{\algorithmiccomment{##1}}
  \newenvironment{ALC@inputs}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@outputs}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@globals}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@body}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@if}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@for}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@whl}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@loop}{\begin{ALC@g}}{\end{ALC@g}}
  \newenvironment{ALC@rpt}{\begin{ALC@g}}{\end{ALC@g}}
  \renewcommand{\\}{\@centercr}
  \newcommand{\INPUTS}[1][default]{\ALC@it\algorithmicinputs\ \ALC@com{##1}\begin{ALC@inputs}}
  \newcommand{\ENDINPUTS}{\end{ALC@inputs}}
  \newcommand{\OUTPUTS}[1][default]{\ALC@it\algorithmicoutputs\ \ALC@com{##1}\begin{ALC@outputs}}
  \newcommand{\ENDOUTPUTS}{\end{ALC@outputs}}
  \newcommand{\GLOBALS}{\ALC@it\algorithmicglobals\ }
  \newcommand{\BODY}[1][default]{\ALC@it\algorithmicbody\ \ALC@com{##1}\begin{ALC@body}}
  \newcommand{\ENDBODY}{\end{ALC@body}}
  \newcommand{\IF}[2][default]{\ALC@it\algorithmicif\ ##2\ \algorithmicthen%
\ALC@com{##1}\begin{ALC@if}}
  \newcommand{\ELSE}[1][default]{\end{ALC@if}\ALC@it\algorithmicelse%
\ALC@com{##1}\begin{ALC@if}}
  \newcommand{\ELSIF}[2][default]%
{\end{ALC@if}\ALC@it\algorithmicelsif\ ##2\ \algorithmicthen%
\ALC@com{##1}\begin{ALC@if}}
  \newcommand{\FOR}[2][default]{\ALC@it\algorithmicfor\ ##2\ \algorithmicdo%
\ALC@com{##1}\begin{ALC@for}}
  \newcommand{\FORALL}[2][default]{\ALC@it\algorithmicforall\ ##2\ %
\algorithmicdo%
\ALC@com{##1}\begin{ALC@for}}
  \newcommand{\WHILE}[2][default]{\ALC@it\algorithmicwhile\ ##2\ %
\algorithmicdo%
\ALC@com{##1}\begin{ALC@whl}}
  \newcommand{\LOOP}[1][default]{\ALC@it\algorithmicloop%
\ALC@com{##1}\begin{ALC@loop}}
  \newcommand{\REPEAT}[1][default]{\ALC@it\algorithmicrepeat%
\ALC@com{##1}\begin{ALC@rpt}}
  \newcommand{\UNTIL}[1]{\end{ALC@rpt}\ALC@it\algorithmicuntil\ ##1}
  \ifthenelse{\boolean{ALC@noend}}{
    \newcommand{\ENDIF}{\end{ALC@if}}
    \newcommand{\ENDFOR}{\end{ALC@for}}
    \newcommand{\ENDWHILE}{\end{ALC@whl}}
    \newcommand{\ENDLOOP}{\end{ALC@loop}}
  }{
    \newcommand{\ENDIF}{\end{ALC@if}\ALC@it\algorithmicendif}
    \newcommand{\ENDFOR}{\end{ALC@for}\ALC@it\algorithmicendfor}
    \newcommand{\ENDWHILE}{\end{ALC@whl}\ALC@it\algorithmicendwhile}
    \newcommand{\ENDLOOP}{\end{ALC@loop}\ALC@it\algorithmicendloop}
  }
  \renewcommand{\@toodeep}{}
  \begin{list}{\ALC@lno}{\setcounter{ALC@rem}{0}\setcounter{ALC@line}{0}%
    \itemsep\z@ \itemindent\z@ \listparindent\z@%
    \partopsep\z@ \parskip\z@ \parsep\z@%
    \labelsep 0.5em \topsep 0.2em%
\ifthenelse{\equal{#1}{0}}
  {\labelwidth 0.5em }
  {\labelwidth  1.2em }
\leftmargin\labelwidth \addtolength{\leftmargin}{\labelsep}
    \ALC@tlm\labelsep
  }
}
{\end{list}}
\makeatother

\begin{document}

\chapter{Example Chapter}
\section{Example Section}
\begin{algorithm}[htbp]
\caption{An example algorithm}
\label{alg1}
\begin{algorithmic}
\REQUIRE Lorem ipsum dolor sit amet, consectetur adipiscing
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus.  
\ENSURE Lorem ipsum dolor sit amet, consectetur adipiscing
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus.  
\STATE Statement 1: Lorem ipsum dolor sit amet, consectetur adipiscing 
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus. \COMMENT{This is a comment}
\REPEAT
\STATE Statement 2: Lorem ipsum dolor sit amet, consectetur adipiscing
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus.  
\STATE Statement 3:  Lorem ipsum dolor sit amet, consectetur
adipiscing elit. Integer lobortis luctus tincidunt. Ut commodo, erat
quis tempor cursus, felis lectus.  
\FOR{$i=0$ to $k$}
\STATE Statement 4:  Lorem ipsum dolor sit amet, consectetur
adipiscing elit. Integer lobortis luctus tincidunt. Ut commodo, erat
quis tempor cursus, felis lectus.  
\STATE Statement 5: Lorem ipsum dolor sit amet, consectetur adipiscing
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus.  
\ENDFOR
\UNTIL{Lorem ipsum dolor sit amet}
\STATE Statement 6: Lorem ipsum dolor sit amet, consectetur adipiscing
elit. Integer lobortis luctus tincidunt. Ut commodo, erat quis tempor
cursus, felis lectus.  
\end{algorithmic}
\end{algorithm}
\end{document}

Answer 1