How do we get tabs rights when using fmat?

[medwatt]

I have the following snippet below. I'm having a formatting issue. When the content of the second fmta block is inserted in node 2 of the first fmat block, the formatting is not respected.

Here's the output I get when the snippet expands:

\begin{figure}[htpb]
    \centering
    \begin{minipage}[b]{30\textwidth}
    \includegraphics[width=\textwidth]{path}
    \caption{caption}
    \label{fig:label}
\end{minipage}
    \hfill
\begin{minipage}[b]{30\textwidth}
    \includegraphics[width=\textwidth]{path}
    \caption{caption}
    \label{fig:label}
\end{minipage}
    \hfill
\begin{minipage}[b]{30\textwidth}
    \includegraphics[width=\textwidth]{path}
    \caption{caption}
    \label{fig:label}
\end{minipage}
\end{figure}

The formatting I expect is:

\begin{figure}[htpb]
    \centering
    \begin{minipage}[b]{30\textwidth}
        \includegraphics[width=\textwidth]{path}
        \caption{caption}
        \label{fig:label}
    \end{minipage}
    \hfill
    \begin{minipage}[b]{30\textwidth}
        \includegraphics[width=\textwidth]{path}
        \caption{caption}
        \label{fig:label}
    \end{minipage}
    \hfill
    \begin{minipage}[b]{30\textwidth}
        \includegraphics[width=\textwidth]{path}
        \caption{caption}
        \label{fig:label}
    \end{minipage}
\end{figure}

Here's the snippet definition.

    s(
        { trig = "(%d+)fig", dscr = "minipage figures", regTrig = true },
        fmta(
            [[
            \begin{figure}[<>]
                \centering
                <>
            \end{figure}
            ]],
            {
                i(1, "htpb"),
                d(2, function(_, snip)
                    local n_figs = tonumber(snip.captures[1])
                    local fig_size = tostring(math.floor (90 / n_figs))
                    local nodes = {}
                    for j = 1, n_figs do
                        local fig_node = sn(j,
                            fmta([[
                                \begin{minipage}[b]{<>\textwidth}
                                    \includegraphics[width=\textwidth]{<>}
                                    \caption{<>}
                                    \label{fig:<>}
                                \end{minipage}
                                ]],
                                {
                                    t(fig_size),
                                    i(1, "path"),
                                    i(2, "caption"),
                                    i(3, "label"),
                                }
                            )
                        )
                        table.insert(nodes, fig_node)

                        if j == n_figs then
                                table.insert(nodes, t({""}))
                            else
                                table.insert(nodes, t({"", "\t\\hfill", ""}))
                        end

                    end
                    return sn(nil, nodes)
                end, nil)
            }
        )
    ),

How can I ensure that the snippet is correctly formatted when it expands?

[atticus-sullivan]

I guess the quick and dirty fix would be to just prepend an extra text node containing the tab in front of the real content.
But looking at the documentation of fmt, it should be possible to fix this in a nicer way. I think trim_empty is the option you're looking for (dedent might be troubling as well).

[atticus-sullivan]

Oh now with L3MON4D3's answer I really understand the problem. My solution won't help (at least not in the general case).

[L3MON4D3]

I mean almost, pretty much anytime fmt causes confusion, the solution is either isn or setting/not setting dedent/trim_empty :D

[L3MON4D3]

Ah, the problem should be that, unlike vscode, the indent before the <> is not applied to all nodes inside the fmta placed at <>. You can take a look at indentSnippetNode, it will take care of applying indent to all lines.
(ie. replace sn(j, ...) with isn(j, ..., "$PARENT_INDENT\t"))