How to create a TeXstudio macro to remove extra brackets?

[fernandozucatelli]

This question is the same I made at the TeXStackExchange Forum in:
https://tex.stackexchange.com/questions/619761/how-to-create-a-texstudio-macro-to-remove-extra-brackets.

I have a software to write mathematical expressions that let me quite faster type while teaching. This software have a LaTeX translation tool that works fine, but it adds as many brackets as it wants.

I have been using the replace tool of TeXstudio with regular expressions (regexp) for a while in order to correct some issues and recently I found how to remove extra brackets in expressions. So I can transform {{any}} into {any}.

I would like to have a TeXstudio macro to perform all replacements, but I got some difficult
writing the correct code for the macro version of the find and replace syntax.

The following links helped me to create the macro as far as I could.

1. https://tex.stackexchange.com/questions/432218/how-to-insert-submatches-from-regular-expression-in-texstudio
2. https://tex.stackexchange.com/questions/272690/broken-regexp-replace-in-texstudio-macros
3. https://tex.stackexchange.com/questions/510503/texstudio-how-to-search-regexp-to-the-next-bracket
4. https://www.w3schools.com/jsref/jsref_obj_regexp.asp
5. https://htmlpreview.github.io/?https://github.com/texstudio-org/texstudio/master/utilities/manual/usermanual_en.html#SECTION33

The following figure shows the Find/Replace syntax that works and the macro version I tried without success.

The Find syntax {{([^\{\}]+)}} also works with {{([^\{\}]*)}}.

I don't know what I should do with the "\1" part I used in the Replace when it goes into the macro.

The operation performed by Find and Replace works as expected.

But when applying the macro I get null as result. I clearly don't know the correct syntax to do the substitutions properly.

A MWE follows, this MWE don't need to be executed.

\begin{equation}
  {{1}} \frac{{a}}{{b}} \dfrac{{num}}{{den}}
  {{a + b}}^{{c + d}}
  {{m + n}
  }
\end{equation}

The SCRIPT I'm trying to create is:

%SCRIPT
options = "g"
scope = editor.document().cursor(0, 0, -1)
editor.replace(/\{\{[^\{\}]*\}\}/g,
	options,scope,
	/\{\\1\}/)

I also tried using a fixed string with "{\\1}"

editor.replace(/\{\{[^\{\}]*\}\}/g,
	options,scope,
	"{\\1}")

and also some variations like /\{$1\}/ without success.

---

Edit

The regexp in Find syntax /\{\{[^\{\}]+\}\}/ (or * instead of +) seems to work properly, it finds every double brackets. Using a replace syntax with a fixed string such as "{A}" does the correct replacement as presented at the following figure.

[sunderme]

%SCRIPT
editor.replace(/{{(.*)}}/,"g","{\\1}")

seems to work.

scope is optional and can be left out if it is all.
The cursor needs to be set differently in txs4.x , see manual.

... and you javascript regex misses the brackets ().

[fernandozucatelli]

Thanks.
Scope and the missing brackets were the keys.
On the other hand, the search syntax with (.*) misses some brackets on my test subject, therefore I kept /{{([^\{\}]*)}}/.

%SCRIPT
editor.replace(/{{([^\{\}]*)}}/, "g", "{\\1}")