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local n = require("luasnip-nodes")
local h = require("luasnip-helpers")
-- pump snippet input into wolframscript and get the output
-- if an error occurs, find out and redo snippet
local mathematica = function (_, snip)
local cmd = "'Check[ToString[" .. snip.captures[1] .. ", TeXForm], Exit[1]]'"
local output = string.sub(vim.fn.system("wolframscript -code " .. cmd), 1, -2)
if string.sub(output, -7, -1) ~= "$Failed" and vim.v.shell_error == 0 then
return n.sn(nil, n.t(output))
else
print("there was an error")
return n.sn(nil, n.fmta("math " .. snip.captures[1] .. "<> math", { n.i(1) }))
end
end
-- creates a matrix row as a snippet node
local rowGenerator = function (j, rows, columns)
local column = {}
local isSquare = rows == columns
for k=1,columns do
local digit = "0"
if isSquare and j==k then
digit = "1"
end
column[2*k-1] = n.i(k, digit)
column[2*k] = n.t(" & ")
end
column[2*columns] = n.t({ " \\\\", "\t" })
if j==rows then
column[2*columns] = nil
end
return n.sn(j, column)
end
-- creates a table row as a snippet node
local tableRowGenerator = function (j, rows, columns)
local column = {}
for k=1,columns do
column[2*k-1] = n.i(k)
column[2*k] = n.t(" & ")
end
column[2*columns] = n.t({ " \\\\ \\hline", "\t" })
if j==rows then
column[2*columns] = n.t({ " \\\\ \\hline" })
end
return n.sn(j, column)
end
-- generates a matrix with dimensions as snippet capture groups
local matrix = function (_, snip)
local rows = tonumber(snip.captures[1])
local columns = tonumber(snip.captures[2])
local nodes = {}
for j=1,rows do
nodes[j] = rowGenerator(j, rows, columns)
end
return n.sn(1, nodes)
end
-- generates a table with dimensions as snippet capture groups
local table = function (_, snip)
local rows = tonumber(snip.captures[1])
local columns = tonumber(snip.captures[2])
local nodes = {}
for j=1,rows do
nodes[j] = tableRowGenerator(j, rows, columns)
end
return n.sn(1, nodes)
end
-- generates little partition definition thing for table environment
local tableCols = function (_, snip)
local columns = tonumber(snip.captures[2])
local output = string.rep("|l", columns)
return output .. "|"
end
-- turns identifier into enum prefix
local enumType = function (_, snip)
local type = snip.captures[1]
if type == "n" then
return "\\arabic*."
elseif type == "a" then
return "\\alph*)"
elseif type == "i" then
return "(\\roman*)"
end
end
return {
-- environment
n.s({trig="beg", snippetType="autosnippet"},
n.fmta(
[[
\begin{<>}
<>
\end{<>}
]],
{ n.i(1), n.i(0), n.rep(1) }),
{ condition = h.line_begin }),
-- named environment
n.s({trig="beng", snippetType="autosnippet"},
n.fmta(
[[
\begin{<>}[<>]
<>
\end{<>}
]],
{ n.i(1), n.i(2), n.i(0), n.rep(1) }),
{ condition = h.line_begin }),
-- equation
n.s({trig="beq", snippetType="autosnippet"},
n.fmta(
[[
\begin{equation}
<>
\end{equation}
]],
{ n.i(0) }),
{ condition = h.line_begin }),
-- WIP plot snippet
n.s({trig="plot(", snippetType="autosnippet"},
n.fmta(
"plot(<>) <> plot",
{ n.i(1), n.i(2) })
),
-- mathematica snippet
n.s({trig="math", snippetType="autosnippet"},
n.fmta("math <> math",
{ n.i(1) }),
{ condition = h.in_mathzone }
),
n.s({trig="math (.*) math", regTrig=true, wordTrig=false},
{ n.d(1, mathematica) },
{ condition = h.in_mathzone }
),
-- bmatrix
n.s({trig="bm", snippetType="autosnippet"},
n.fmta(
[[
\begin{bmatrix}{<>,<>} \end{bmatrix}
]],
{ n.i(1), n.i(2) }),
{ condition = h.line_begin * h.in_mathzone }),
-- matrix with arbitrary brackets
n.s({trig="zmat", snippetType="autosnippet"},
n.fmta(
[[
\begin{<>matrix}{<>,<>} \end{<>matrix}
]],
{ n.i(1), n.i(2), n.i(3), n.rep(1) }),
{ condition = h.line_begin * h.in_mathzone }),
n.s({trig="\\begin{.matrix}{(%d+),(%d+)} \\end{(.)matrix}", regTrig=true, wordTrig=false},
n.fmta(
[[
\begin{<>matrix}
<>
\end{<>matrix}
]],
{ n.f(function(_, parent) return parent.captures[3] end), n.d(1, matrix), n.f(function(_, parent) return parent.captures[3] end) }),
{ condition = h.in_mathzone }),
-- table
n.s({trig="tab", snippetType="autosnippet"},
n.fmta(
[[
\begin{table}{<>,<>} \end{table}
]],
{ n.i(1), n.i(2) }),
{ condition = h.line_begin }),
n.s({trig="\\begin{table}{(%d+),(%d+)} \\end{table}", regTrig=true, wordTrig=false},
n.fmta(
[[
\begin{tabular}{<>}
\hline
<>
\end{tabular}
]],
{ n.f(tableCols), n.d(1, table) })),
-- enum with n=numbers, a=alphas, or i=roman numerals
n.s({trig="enum([nai])", regTrig=true, snippetType="autosnippet"},
n.fmta(
[[
\begin{enumerate}[label=<>]
\item <>
\end{enumerate}
]],
{ n.f(enumType), n.i(0) }),
{ condition = h.in_text * h.line_begin }),
-- itemize
n.s({trig="item", snippetType="autosnippet"},
n.fmta(
[[
\begin{itemize}
\item <>
\end{itemize}
]],
{ n.i(0) }),
{ condition = h.in_text * h.line_begin }),
-- split equation environment
n.s({trig="slt", snippetType="autosnippet"},
n.fmta(
[[
\begin{equation}\begin{split}
<>
\end{split}\end{equation}
]],
{ n.i(0) }),
{ condition = h.in_text * h.line_begin })
-- split display equation
n.s({trig="sld", snippetType="autosnippet"},
n.fmta(
[[
\[ \begin{split}
<>
\end{split} \]
]],
{ n.i(0) }),
{ condition = h.in_text * h.line_begin })
}
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