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local P, R, S, V, C, Cb, Cc, Cf, Cg, Cp, Cs, Ct = lpeg.P, lpeg.R, lpeg.S, lpeg.V,
lpeg.C, lpeg.Cb, lpeg.Cc, lpeg.Cf, lpeg.Cg, lpeg.Cp, lpeg.Cs, lpeg.Ct
lpeg.locale(lpeg)
local alnum, alpha, cntrl, digit, graph, lower, punct, space, upper, xdigit =
lpeg.alnum, lpeg.alpha, lpeg.cntrl, lpeg.digit, lpeg.graph,
lpeg.lower, lpeg.punct, lpeg.space, lpeg.upper, lpeg.xdigit
local function anywhere(p)
return P{ Cp() * p * Cp() + 1 * V(1) }
end
local language = {}
language["latex"] =
{
{1, "Package", P"\\" * (P"documentclass" + P"usepackage")},
{6, "NewCommand", P"\\newcommand"},
{3, "SetCommand", P"\\set" * alpha ^ 1},
{4, "BeginEnd", P"\\" * (P"begin" + P"end")},
{5, "Section", P"\\" * (P"part" + P"chapter" + P"section" + P"subsection")},
{2, "Command", P"\\" * alpha ^ 1},
{7, "Brace", S"{}"},
{8, "MathMode", P"$"},
{9, "Comment", P"%" * (P(1) - S"\r\n") ^ 0 * (S"\r\n" + -1)},
}
language["latex/math"] =
{
{6, "LeftRight", P"\\" * (P"left" + P"right")},
{2, "Command", P"\\" * alpha ^ 1},
{8, "MathMode", P"$"},
{4, "Script", S"_^"},
{5, "Number", digit ^ 1},
{1, "Brace", S"{}"},
{7, "Bracket", S"[]"},
{3, "Parenthesis", S"()"},
{9, "Comment", P"%" * (P(1) - S"\r\n") ^ 0 * (S"\r\n" + -1)},
}
language["latex/table"] =
{
{8, "Newline", P"\\\\"},
{1, "Alignment", P"&" },
{6, "BeginEnd", P"\\" * (P"begin" + P"end")},
{4, "Command", P"\\" * alpha ^ 1},
{2, "Brace", S"{}"},
{3, "Bracket", S"[]"},
{9, "Comment", P"%" * (P(1) - S"\r\n") ^ 0 * (S"\r\n" + -1)},
}
language["latex/latex2"] =
{
{1, "Argument", P"#" ^ 1 * digit},
{6, "NewCommand", P"\\" * (P"" + S"egx") * P"def"},
{5, "SetCommand", P"\\set" * alpha ^ 1},
{4, "PrivateCmd", P"\\" * alpha ^ 0 * P"@" * (alpha + "@") ^ 0},
{3, "Command", P"\\" * alpha ^ 1},
{2, "Brace", S"{}"},
{7, "Bracket", S"[]"},
{9, "Comment", P"%" * (P(1) - S"\r\n") ^ 0 * (S"\r\n" + -1)},
}
language["latex/latex3"] =
{
{1, "Argument", P"#" ^ 1 * digit},
{2, "PrivateVar", P"\\" * S"cgl" * P"__" * (alpha + S"_:@") ^ 1},
{5, "PrivateFun", P"\\" * P"__" * (alpha + S"_:@") ^ 1},
{4, "PublicVar", P"\\" * S"cgl" * P"_" * (alpha + S"_:@") ^ 1},
{6, "PublicFun", P"\\" * (alpha + S"_:@") ^ 1},
{8, "Brace", S"{}"},
{3, "Bracket", S"[]"},
{9, "Comment", P"%" * (P(1) - S"\r\n") ^ 0 * (S"\r\n" + -1)},
}
local function FindMatch(lang, code)
syntax = language[lang]
local b, e, s = -1, -1, ""
for _, v in ipairs(syntax) do
local p = v[3]
mb, me = anywhere(p):match(code)
if mb and (b == -1 or mb < b) then
b = mb
e = me
s = v[1]
end
end
--print(b, e, s)
return b, e, s
end
---- We don't have "catcodetable@other" inside source2e
-- local cctab = luatexbase.registernumber("catcodetable@other")
---- Here is the catcodetable from luatexbase package
local cctab = luatexbase.catcodetables.CatcodeTableOther
local function PrintCommand(name, content)
tex.tprint(
{"\\expandafter\\gdef\\csname " .. name .. "\\endcsname{"},
{cctab, content}, -- all characters including spaces have catcode 12
{"}"}
)
end
local count = 0
local function PrintCode(style, code)
count = count + 1
local name = "l__codehigh_parse_code_" .. count .. "_tl"
PrintCommand(name, code)
name = "l__codehigh_parse_style_" .. count .. "_tl"
PrintCommand(name, style)
end
function ParseCode(lang, code)
count = 0
while code ~= "" do
local b, e, s = FindMatch(lang, code)
--texio.write_nl(code)
--texio.write_nl("b = " .. b)
--texio.write_nl("e = " .. e)
--texio.write_nl("s = " .. s)
if b == -1 then
PrintCode(0, code)
code = ""
else
PrintCode(0, code:sub(1, b-1))
PrintCode(s, code:sub(b, e-1))
code = code:sub(e)
end
end
local name = "l__codehigh_parse_code_count_tl"
tex.sprint("\\expandafter\\gdef\\csname " .. name .. "\\endcsname{" .. count .. "}")
end
return { FindMatch = FindMatch, PrintCode = PrintCode, ParseCode = ParseCode }
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