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My objective is to replace math delimiters path $...$ by \(...\)

\documentclass[12pt,a4paper]{article}
\begin{document}
    This is a sample text $ \sin\alpha $ and $ \cos\alpha. $
    \begin{enumerate}
        \item $ \lim\limits_{x\to 0} \frac{\sin x}{x} $
        \item $ \tan\alpha=\frac{\sin\alpha}{\cos\alpha} $
    \end{enumerate}
\end{document}

Expected output:

\documentclass[12pt,a4paper]{article}
\begin{document}
    This is a sample text  \( \sin\alpha \)  and  \( \cos\alpha. \) 
    \begin{enumerate}
        \item  \( \lim\limits_{x\to 0} \frac{\sin x}{x} \) 
        \item  \( \tan\alpha=\frac{\sin\alpha}{\cos\alpha} \) 
    \end{enumerate}
\end{document}

How can we do this in TeXstudio TeX editor?

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2 Answers 2

Reset to default
6

You can create a macro for that to make the replacement in one click or with a press of the shortcut (Ctrl+Alt+1 in the example).

%SCRIPT
regexParsed = editor.text().replace(/([^\$\\])\$([^\$]+)\$/gm, '$1\\($2\\)').replace(/\r/g, '');
editor.setText(regexParsed)

This approach also takes into account $$ display math and dollar signs in a text \$, so that your project won't break in case there are some of them. enter image description here

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4
  • It doesn't work if the two $'s are not on the same line (my solution too) This is a feature missing from TeXStudio regular expressions.
    – gigiair
    Feb 28 at 11:47
  • See this minimal example on pastebin ix.io/3QZW . You can have surprising results. You should use an interactive way, as I do.
    – gigiair
    Feb 28 at 13:38
  • If needed, one can always test their regular expressions in regexr.com. About double $$, if it's not desired, one can always substitute all $$ in sequence for one $ and then the order substitution. Indeed, it is as easy as writing both editor.replace commands in sequence. I've faced some problems which breaking it into pieces made the regular expression a lot more easier.
    – FHZ
    Feb 28 at 18:29
  • @gigiair thank you for the issue report. I edited the code to take into account this situation as well.
    – antshar
    Mar 1 at 10:11
3

Search and replace (Ctrl R) (^|[^$\\])\$([^\$]+)\$ with \1\(\2\)

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6
  • 2
    This won't work as expected if the OP has $$ display math, so the document will be corrupted. You need to add an additional check for this situation.
    – antshar
    Feb 28 at 10:22
  • 1
    This shouldn't be the case because $$ is TeX and its use is deprecated in LaTeX. It must first replace $$..$$ with \[..\]
    – gigiair
    Feb 28 at 10:41
  • 1
    Note that the main downside is that it doesn't work if the two $s aren't on the same line. It's possible with Emacs, but in TeXStudio I'm afraid it's not possible. Emacs regular expressions are much more powerful than TeXStudio regular expressions.
    – gigiair
    Feb 28 at 11:06
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    @gigiair I have already tested with TeXstudio 4.2.2 and as have mentioned, it doesn't works when the pair $,$ is not in the same line. Your answer is helpful to the community and I have learned something new form it.
    – Say OL
    Feb 28 at 11:20
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    @antshar I fixed the regex for the bug you reported. I think it's not a good idea to make a macro because you have to manually check if the pair of $ is not on the same line and TS regexps are not able to do that. Looks at my MWE upward.
    – gigiair
    Feb 28 at 18:22

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