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--
-- longmath-doc.lua is part of longmath version 1.0.
--
-- (c) 2024 Hans-Jürgen Matschull
--
-- This work may be distributed and/or modified under the
-- conditions of the LaTeX Project Public License, either version 1.3
-- of this license or (at your option) any later version.
-- The latest version of this license is in
-- http://www.latex-project.org/lppl.txt
-- and version 1.3 or later is part of all distributions of LaTeX
-- version 2005/12/01 or later.
--
-- This work has the LPPL maintenance status 'maintained'.
--
-- The Current Maintainer of this work is Hans-Jürgen Matschull
--
-- see README for a list of files belonging to longmath.
--
local match = unicode.utf8.match
local gsub = unicode.utf8.gsub
local find = unicode.utf8.find
local nixpatt = {
{ n = 'newl', p = '\n' },
{ n = 'text', p = '[^\n]*' },
}
local texpatt = {
{ n = 'group', p = '%b{}' },
{ n = 'math', p = '%(%)' },
{ n = 'defn', p = '\\newcount\\[%w@]+' },
{ n = 'defn', p = '\\newdimen\\[%w@]+' },
{ n = 'defn', p = '\\def\\[%w@]+' },
{ n = 'expl', p = '%%%%%%[^\n]*' },
{ n = 'expl', p = '%&%&%&[^\n]*' },
{ n = 'comm', p = '%%[^\n]*' },
{ n = 'oper', p = '[#]+%d' },
{ n = 'macro', p = '\\[%w@]+' },
{ n = 'punc', p = '\\%W' },
{ n = 'newl', p = '\n' },
{ n = 'space', p = '[ ]+' },
{ n = 'inter', p = "»[^«]*«" },
{ n = 'text', p = '[%w@_….,;:~?!\'€∞]+' },
{ n = 'math', p = '[-+/^=≠<>≤≥·×÷≈"]+' },
{ n = 'open', p = '[%[%(%{]' },
{ n = 'close', p = '[%]%)%}]' },
{ n = 'punc', p = '[%%&$#*|`\']' },
}
local function write( item, d )
if item.n == 'open' then item.n = 'group' if d < 9 then d = d + 1 end end
if item.n == 'close' then if d > 0 then d = d - 1 end item.n = 'group' end
if item.n == 'newl' then
tex.sprint( '\\\\\\strut' )
elseif item.n == 'expl' then
local t = item.p
t = gsub( t, '%%%%%%','' )
t = gsub( t, '%-%-%-', '' )
t = gsub( t, '%&%&%&', '' )
tex.sprint( '\\rlap{\\textrm{'..t..'}}' )
elseif item.n == 'inter' then
tex.sprint( ( item.p:gsub( '«', '' ):gsub( '»', '' ) ) )
else
local ex = string.explode( item.p, ' ' )
tex.sprint( '\\textcolor{code' .. item.n .. '}{' )
for i, t in ipairs( ex ) do
if i > 1 then tex.sprint( '{ }' ) end
t = t:gsub( '\\%<', '\\{' ):gsub( '\\%>', '\\}' ):gsub( '«', '' ):gsub( '»', '' )
tex.write( t )
end
tex.sprint( '}' )
end
return d
end
local function nsplit( code )
local list1 = {}
while code ~= '' do
local a, b
for _, p in ipairs( nixpatt ) do
a, b = match( code, '^(' .. p.p .. ')(.*)$' )
if a and b then table.insert( list1, { n = p.n, p = a } ); code = b; break end
end
if not a then table.insert( list1, { n = 'rest', p = code } ); code = '' end
end
return list1
end
local function tsplit( code )
local list1 = {}
while code ~= '' do
local a, b
for _, p in ipairs( texpatt ) do
a, b = match( code, '^(' .. p.p .. ')(.*)$' )
if a and b then table.insert( list1, { n = p.n, p = a } ); code = b; break end
end
if not a then table.insert( list1, { n = 'rest', p = code } ); code = '' end
end
local list2 = {}
local lgrp = 0
local isub
for _, item in ipairs( list1 ) do
if item.n == 'luap' then
table.insert( list2, { n = 'macro', p = '\\begin' } )
table.insert( list2, { n = 'open', p = '{' } )
table.insert( list2, { n = 'luac', p = 'luap' } )
table.insert( list2, { n = 'close', p = '}' } )
isub = lsplit( item.p:gsub( '\\begin{luap}', '' ):gsub( '\\end{luap}', '' ) )
for _, i in ipairs( isub ) do table.insert( list2, i ) end
table.insert( list2, { n = 'macro', p = '\\end' } )
table.insert( list2, { n = 'open', p = '{' } )
table.insert( list2, { n = 'luac', p = 'luap' } )
table.insert( list2, { n = 'close', p = '}' } )
elseif item.n == 'group' then
local a, b = item.p:sub( 1, 1 ), item.p:sub( -1, -1 )
if lgrp > 0 then
item = lsplit( item.p:sub( 2, -2 ) )
lgrp = lgrp - 1
else
item = tsplit( item.p:sub( 2, -2 ) )
end
table.insert( list2, { n = 'open', p = a } )
for _, i in ipairs( item ) do table.insert( list2, i ) end
table.insert( list2, { n = 'close', p = b } )
elseif item.n == 'macro' then
local lc = item.p:sub( 2 )
table.insert( list2, item )
elseif item.n == 'space' then
table.insert( list2, item )
else
table.insert( list2, item )
end
end
return list2
end
local codelist = {}
local function readcode( env )
local name = string.format( '\\end{%s}', env )
local patt = name:gsub( '(%W)', '%%%1' )
local typ, line
local lines, len, spc = {}, 0, 1000
while true do
line = token.scan_word()
if type( line ) == 'string' then
local a, b = line:find( patt )
if a and b then break end
line = line:gsub( '\\%.[%[%s%w%]]*$', '' ):gsub( '\\%.', '\\\\' )
line = line:gsub( '%s*$', '' )
local stub = line:gsub( '%%%%%%.*$', '' ):gsub( '%-%-%-.*$', '' )
if not typ and stub:match( '[^\\]\\%w' ) then typ = tsplit end
len = math.max( len, unicode.utf8.len( stub:gsub( '»[^«]*«', '' ) ) )
spc = math.min( spc, line:find( '%S' ) or 1000 )
table.insert( lines, line )
else
token.get_next()
table.insert( lines, '' )
end
end
local code = ''
for _, line in ipairs( lines ) do code = code .. line:sub( spc ) .. '\n' end
code = code:gsub( '\\(%W)', '°%1' ):gsub( '°}', '°>' ):gsub( '°{', '°<' ):gsub( '°', '\\' ):gsub( '\n$', '' )
tex.setdimen( 'global', 'codesize', ( len - spc + 1.5 ) * tex.dimen.ttwidth )
codelist = ( typ or lsplit )( code )
tex.sprint( tex.count['longmathdoc@ccnum@'], '\\endgroup' )
tex.sprint( name )
end
local function writecode()
local dep = 0
tex.sprint( '\\strut' )
for _, item in ipairs( codelist ) do dep = write( item, dep ) end
end
local dummy
local function readstring()
dummy = string.explode( token.scan_string() )
end
local function writestring()
for i, c in ipairs( dummy ) do
if i > 1 then tex.sprint( '~' ) end
tex.sprint( '\\verbC{' ) tex.write( c ) tex.sprint( '}' )
end
end
return { readcode = readcode, writecode = writecode,
readstring = readstring, writestring = writestring }
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