removing parts of the snippet

[franto666]

Hello world, Is it possible to create a snippet whose purpose is to create the similar environment:

snippet aj "Theorem" bA \begin{Teorema}[$1]\label{teo: $1} $2 \end{Teorema} endsnippet

and enable it to do the following: if it is not necessary to write anything in $1, move to $2, but in the meantime have deleted the whole:

[$1]\label{teo: $1}

So when someone doesn't want to write in [$1] of the environment, they don't need to.

[gruvw]

I managed to achieve your request (in a quirky way):

snippet aj "Theorem" bA
`` rv = "\\begin{Teorema}" + (t[0].length > 0 ? "[" : "") ``$1`` rv = t[0].length > 0 ? `]\\label{teo: ${t[0]}}` : ""``
$2
\end{Teorema}
endsnippet

However, the cursor is misplaced from one character to the left when I start to input inside the first placeholder.
After a quick investigation, I found out that it is misplaced because of the dynamically inserted prefix [ before the placeholder. Dynamically inserting more than one character before a placeholder results in more offsets.

On top of that, if you try to use a default value for the content of the first placeholder (${1:default} instead of $1) the snippet breaks.

P.S. : you should not use issues to ask for a specific snippet realization, check out discussions (https://github.com/draivin/hsnips/discussions) for this purpose.

[Francesco-2003]

Thank you for the answer, I have tried your solution but it doesn't work properly; if you type "aj" (then the snippet expands) and then you type for example "gauss", the snippet doesn't work

[gruvw]

I just checked it out once again and on my computer writing "gauss" results in the following:

\begin{Teorema}[aussg]\label{teo: aussg}

\end{Teorema}

(the g is at the end for the reason evoked in my first comment)

Disclaimer: It might work on my vscode and not yours because I have the vim extension installed, I know having both vim and hsnips creates some weird conflicts...