将诗歌署名与诗行宽度的右侧对齐，而不是与页面的右侧对齐

Question

我想在回忆录中添加一些诗歌的归属。下面的代码可以做到这一点，但会将归属与文本块的右侧对齐。我希望它们与诗句宽度的右侧对齐。

\documentclass[11pt]{memoir}

\newcommand{\attrib}[1]{%
  \vskip2ex\nopagebreak{\raggedleft\footnotesize #1\par}}

\begin{document}

\settowidth{\versewidth}{``This boy is forest-born.''}
\begin{verse}[\versewidth]
``This boy is forest-born.''\\
\attrib{\textit{-- As You Like It}}
\end{verse}

\end{document}

Answer 1

此处的宏\attrib可以采用可选参数来手动覆盖\versewidth。将可选参数设置为\textwidth将使归因相对于页面右对齐，如 MWE 中所示。

\documentclass[11pt]{memoir}
\newcommand{\attrib}[2][\versewidth]{%
  \vskip2ex\nopagebreak{\raggedleft\footnotesize%
  #2\hspace{\dimexpr.5\textwidth-.5\dimexpr#1}\mbox{}\par}}

\begin{document}

\settowidth{\versewidth}{``This boy is forest-born.''}
\begin{verse}[\versewidth]
``This boy is forest-born.''\\
\attrib{\textit{-- As You Like It}}
\end{verse}

\settowidth{\versewidth}{``This boy is forest-born blah blah.''}
\begin{verse}[\versewidth]
``This boy is forest-born blah blah.''\\
\attrib{\textit{-- As You Like It}}
\end{verse}

\settowidth{\versewidth}{``Override the default attib placement.''}
\begin{verse}[\versewidth]
``Override the default attib placement.''\\
\attrib[\textwidth]{\textit{-- As You Like It}}
\end{verse}

\end{document}