آیا می‌توان با استفاده از بسته ulem متن را هایلات کرد؟

Question

وقتی از کد موجود در این پاسخ استفاده می‌کنیم:

\documentclass{article}
\usepackage{color}
\usepackage{ulem}
\usepackage[RTLdocument]{bidi}
\newcommand\hl{\bgroup\markoverwith
  {\textcolor{yellow}{\rule[-.5ex]{2pt}{2.5ex}}}\ULon}
\begin{document}
This is a test \hl{Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.} text.
\end{document}

خروجی زیر را می‌گیریم که مشکل‌دار است (رنگ کل متن را پوشانده است):

این مشکل را چگونه می‌توان حل کرد؟

Answer 1

هایلات کردم متن بصورت معمولی با بسته ulem مشکل دارد. به عنوان مثال نمونه چپ به راست زیر را در نظر بگیرید:

\documentclass{article}
\usepackage{color}
\usepackage{ulem}
\newcommand\hl{\bgroup\markoverwith
  {\textcolor{yellow}{\rule[-.5ex]{2pt}{2.5ex}}}\ULon}
\begin{document}
This is a test \hl{Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.} text.
\end{document}

اگر به دقت به خروجی نگاه کنید متوجه می‌شوید که رنگ قسمت کوچکی از تعدادی از حروف را پوشانده است.

مشکل در حالت راست به چپ این است که کادر نگی روی متن کشیده می‌شود در حالی که باید متن روی کادر رنگی قرار بگیرد. برای حل مشکل در حالت راست به چپ کافی است تعریف دستور \UL@putbox را بصورت زیر تغییر دهیم:

\def\UL@putbox{\ifx\UL@start\@empty \else % not inner
  \vrule\@width\z@ \LA@penalty\@M
  \if@RTL
    {\UL@skip\wd\UL@box \box\UL@box \kern-\UL@skip \UL@leaders \kern\z@}%
  \else
    {\UL@skip\wd\UL@box \UL@leaders \kern-\UL@skip}%
    \box\UL@box  
  \fi \fi}

بدین صورت متن روی کادر رنگی در حالت راست به چپ قرار خواهد گرفت و بنابراین مشکل حل می‌شود. نمونه کامل بصورت زیر است:

\documentclass{article}
\usepackage{color}
\usepackage{ulem}
\usepackage[RTLdocument]{bidi}
\newcommand\hl{\bgroup\markoverwith
  {\textcolor{yellow}{\rule[-.5ex]{2pt}{2.5ex}}}\ULon}
\makeatletter
\def\UL@putbox{\ifx\UL@start\@empty \else % not inner
  \vrule\@width\z@ \LA@penalty\@M
  \if@RTL
    {\UL@skip\wd\UL@box \box\UL@box \kern-\UL@skip \UL@leaders \kern\z@}%
  \else
    {\UL@skip\wd\UL@box \UL@leaders \kern-\UL@skip}%
    \box\UL@box  
  \fi \fi}
\makeatother
\begin{document}
This is a test \hl{Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.} text.
\end{document}

که خروجی زیر را می‌دهد:

روشن است که اگر به دقت به خروجی نگاه کنید، مشکل موجود در حالت چپ به راست (پوشانده شدن قسمتهای کوچکی از تعدادی از حروف توسط رنگ) در اینجا هم وجود دارد.