summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/tex/luatex/nodetree
diff options
context:
space:
mode:
authorKarl Berry <karl@freefriends.org>2017-01-21 23:10:12 +0000
committerKarl Berry <karl@freefriends.org>2017-01-21 23:10:12 +0000
commit8997cba3b476b351f1fe11a859adc2494136ce47 (patch)
tree9a52bdcc9a06a19bb4871e3cc9df8d777183cc4e /Master/texmf-dist/tex/luatex/nodetree
parent12c6358be2e4b84cb8a0888ec14364c714711fbd (diff)
nodetree.{tex,lua} in runtime, rolf 21 Jan 2017 13:28:23
git-svn-id: svn://tug.org/texlive/trunk@43011 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/luatex/nodetree')
-rw-r--r--Master/texmf-dist/tex/luatex/nodetree/nodetree.lua716
-rw-r--r--Master/texmf-dist/tex/luatex/nodetree/nodetree.tex47
2 files changed, 763 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/luatex/nodetree/nodetree.lua b/Master/texmf-dist/tex/luatex/nodetree/nodetree.lua
new file mode 100644
index 00000000000..170f040c348
--- /dev/null
+++ b/Master/texmf-dist/tex/luatex/nodetree/nodetree.lua
@@ -0,0 +1,716 @@
+local nodex = {}
+local tpl = {}
+local tree = {}
+tree.state = {}
+local callbacks = {}
+local base = {}
+local options = {}
+function nodex.node_id(n)
+ return string.gsub(tostring(n), '^<node%s+%S+%s+<%s+(%d+).*', '%1')
+end
+function nodex.subtype(n)
+ local typ = node.type(n.id)
+ local subtypes = {
+ hlist = {
+ [0] = 'unknown',
+ [1] = 'line',
+ [2] = 'box',
+ [3] = 'indent',
+ [4] = 'alignment',
+ [5] = 'cell',
+ [6] = 'equation',
+ [7] = 'equationnumber',
+ },
+ vlist = {
+ [0] = 'unknown',
+ [4] = 'alignment',
+ [5] = 'cell',
+ },
+ rule = {
+ [0] = 'unknown',
+ [1] = 'box',
+ [2] = 'image',
+ [3] = 'empty',
+ [4] = 'user',
+ },
+ adjust = {
+ [0] = 'normal',
+ [1] = 'pre',
+ },
+ boundary = {
+ [0] = 'cancel',
+ [1] = 'user',
+ [2] = 'protrusion',
+ [3] = 'word',
+ },
+ disc = {
+ [0] = 'discretionary',
+ [1] = 'explicit',
+ [2] = 'automatic',
+ [3] = 'regular',
+ [4] = 'first',
+ [5] = 'second',
+ },
+ math = {
+ [0] = 'beginmath',
+ [1] = 'endmath',
+ },
+ glue = {
+ [0] = 'userskip',
+ [1] = 'lineskip',
+ [2] = 'baselineskip',
+ [3] = 'parskip',
+ [4] = 'abovedisplayskip',
+ [5] = 'belowdisplayskip',
+ [6] = 'abovedisplayshortskip',
+ [7] = 'belowdisplayshortskip',
+ [8] = 'leftskip',
+ [9] = 'rightskip',
+ [10] = 'topskip',
+ [11] = 'splittopskip',
+ [12] = 'tabskip',
+ [13] = 'spaceskip',
+ [14] = 'xspaceskip',
+ [15] = 'parfillskip',
+ [16] = 'mathskip',
+ [17] = 'thinmuskip',
+ [18] = 'medmuskip',
+ [19] = 'thickmuskip',
+ [98] = 'conditionalmathskip',
+ [99] = 'muglue',
+ [100] = 'leaders',
+ [101] = 'cleaders',
+ [102] = 'xleaders',
+ [103] = 'gleaders',
+ },
+ kern = {
+ [0] = 'fontkern',
+ [1] = 'userkern',
+ [2] = 'accentkern',
+ [3] = 'italiccorrection',
+ },
+ noad = {
+ [0] = 'ord',
+ [1] = 'opdisplaylimits',
+ [2] = 'oplimits',
+ [3] = 'opnolimits',
+ [4] = 'bin',
+ [5] = 'rel',
+ [6] = 'open',
+ [7] = 'close',
+ [8] = 'punct',
+ [9] = 'inner',
+ [10] = 'under',
+ [11] = 'over',
+ [12] = 'vcenter',
+ },
+ radical = {
+ [0] = 'radical',
+ [1] = 'uradical',
+ [2] = 'uroot',
+ [3] = 'uunderdelimiter',
+ [4] = 'uoverdelimiter',
+ [5] = 'udelimiterunder',
+ [6] = 'udelimiterover',
+ },
+ accent = {
+ [0] = 'bothflexible',
+ [1] = 'fixedtop',
+ [2] = 'fixedbottom',
+ [3] = 'fixedboth',
+ },
+ fence = {
+ [0] = 'unset',
+ [1] = 'left',
+ [2] = 'middle',
+ [3] = 'right',
+ },
+ glyph = {
+ [0] = 'character',
+ [1] = 'ligature',
+ [2] = 'ghost',
+ [3] = 'left',
+ [4] = 'right',
+ },
+ }
+ subtypes.whatsit = node.whatsits()
+ local out = ''
+ if subtypes[typ] and subtypes[typ][n.subtype] then
+ out = subtypes[typ][n.subtype]
+ if options.verbosity > 1 then
+ out = out .. tpl.type_id(n.subtype)
+ end
+ return out
+ else
+ return tostring(n.subtype)
+ end
+ assert(false)
+end
+function tpl.round(number)
+ local mult = 10^(options.decimalplaces or 0)
+ return math.floor(number * mult + 0.5) / mult
+end
+function tpl.length(input)
+ input = tonumber(input)
+ input = input / tex.sp('1' .. options.unit)
+ return string.format('%g%s', tpl.round(input), options.unit)
+end
+function tpl.fill(number, order, field)
+ if order ~= nil and order ~= 0 then
+ if field == 'stretch' then
+ out = '+'
+ else
+ out = '-'
+ end
+ return out .. string.format(
+ '%gfi%s', number / 2^16,
+ string.rep('l', order - 1)
+ )
+ else
+ return tpl.length(number)
+ end
+end
+tpl.node_colors = {
+ hlist = {'red', 'bright'},
+ vlist = {'green', 'bright'},
+ rule = {'blue', 'bright'},
+ ins = {'blue'},
+ mark = {'magenta'},
+ adjust = {'cyan'},
+ boundary = {'red', 'bright'},
+ disc = {'green', 'bright'},
+ whatsit = {'yellow', 'bright'},
+ local_par = {'blue', 'bright'},
+ dir = {'magenta', 'bright'},
+ math = {'cyan', 'bright'},
+ glue = {'magenta', 'bright'},
+ kern = {'green', 'bright'},
+ penalty = {'yellow', 'bright'},
+ unset = {'blue'},
+ style = {'magenta'},
+ choice = {'cyan'},
+ noad = {'red'},
+ radical = {'green'},
+ fraction = {'yellow'},
+ accent = {'blue'},
+ fence = {'magenta'},
+ math_char = {'cyan'},
+ sub_box = {'red', 'bright'},
+ sub_mlist = {'green', 'bright'},
+ math_text_char = {'yellow', 'bright'},
+ delim = {'blue', 'bright'},
+ margin_kern = {'magenta', 'bright'},
+ glyph = {'cyan', 'bright'},
+ align_record = {'red'},
+ pseudo_file = {'green'},
+ pseudo_line = {'yellow'},
+ page_insert = {'blue'},
+ split_insert = {'magenta'},
+ expr_stack = {'cyan'},
+ nested_list = {'red'},
+ span = {'green'},
+ attribute = {'yellow'},
+ glue_spec = {'magenta'},
+ attribute_list = {'cyan'},
+ temp = {'magenta'},
+ align_stack = {'red', 'bright'},
+ movement_stack = {'green', 'bright'},
+ if_stack = {'yellow', 'bright'},
+ unhyphenated = {'magenta', 'bright'},
+ hyphenated = {'cyan', 'bright'},
+ delta = {'red'},
+ passive = {'green'},
+ shape = {'yellow'},
+}
+function tpl.color_code(code)
+ return string.char(27) .. '[' .. tostring(code) .. 'm'
+end
+function tpl.color(color, mode, background)
+ if options.color ~= 'colored' then
+ return ''
+ end
+ local out = ''
+ local code = ''
+ if mode == 'bright' then
+ out = tpl.color_code(1)
+ elseif mode == 'dim' then
+ out = tpl.color_code(2)
+ end
+ if not background then
+ if color == 'reset' then code = 0
+ elseif color == 'red' then code = 31
+ elseif color == 'green' then code = 32
+ elseif color == 'yellow' then code = 33
+ elseif color == 'blue' then code = 34
+ elseif color == 'magenta' then code = 35
+ elseif color == 'cyan' then code = 36
+ else code = 37 end
+ else
+ if color == 'black' then code = 40
+ elseif color == 'red' then code = 41
+ elseif color == 'green' then code = 42
+ elseif color == 'yellow' then code = 43
+ elseif color == 'blue' then code = 44
+ elseif color == 'magenta' then code = 45
+ elseif color == 'cyan' then code = 46
+ elseif color == 'white' then code = 47
+ else code = 40 end
+ end
+ return out .. tpl.color_code(code)
+end
+function tpl.key_value(key, value)
+ local out = tpl.color('yellow') .. key .. ': '
+ if value then
+ out = out .. tpl.color('white') .. value .. '; '
+ end
+ return out .. tpl.color('reset')
+end
+function tpl.char(input)
+ return string.format('%q', unicode.utf8.char(input))
+end
+function tpl.type(type, id)
+ local out = tpl.color(
+ tpl.node_colors[type][1],
+ tpl.node_colors[type][2]
+ )
+ .. string.upper(type)
+ if options.verbosity > 1 then
+ out = out .. tpl.type_id(id)
+ end
+ return out .. tpl.color('reset') .. ' '
+end
+function tpl.callback_variable(variable_name, variable)
+ if variable ~= nil and variable ~= '' then
+ tpl.print(variable_name .. ': ' .. tostring(variable))
+ end
+end
+function tpl.line(length)
+ if length == 'long' then
+ return '------------------------------------------'
+ else
+ return '-----------------------'
+ end
+end
+function tpl.callback(callback_name, variables)
+ tpl.print('\n\n')
+ tpl.print('Callback: ' .. tpl.color('red', '', true) ..
+ callback_name .. tpl.color('reset')
+ )
+ if variables then
+ for name, value in pairs(variables) do
+ if value ~= nil and value ~= '' then
+ tpl.print(' - ' .. name .. ': ' .. tostring(value))
+ end
+ end
+ end
+ tpl.print(tpl.line('long'))
+end
+function tpl.type_id(id)
+ return '[' .. tostring(id) .. ']'
+end
+function tpl.branch(connection_type, connection_state, last)
+ local c = connection_type
+ local s = connection_state
+ local l = last
+ if c == 'list' and s == 'stop' and l == false then
+ return ' '
+ elseif c == 'field' and s == 'stop' and l == false then
+ return ' '
+ elseif c == 'list' and s == 'continue' and l == false then
+ return '│ '
+ elseif c == 'field' and s == 'continue' and l == false then
+ return '║ '
+ elseif c == 'list' and s == 'continue' and l == true then
+ return '├─'
+ elseif c == 'field' and s == 'continue' and l == true then
+ return '╠═'
+ elseif c == 'list' and s == 'stop' and l == true then
+ return '└─'
+ elseif c == 'field' and s == 'stop' and l == true then
+ return '╚═'
+ end
+end
+function tpl.branches(level, connection_type)
+ local out = ''
+ for i = 1, level - 1 do
+ out = out .. tpl.branch('list', tree.state[i]['list'], false)
+ out = out .. tpl.branch('field', tree.state[i]['field'], false)
+ end
+ if connection_type == 'list' then
+ out = out .. tpl.branch('list', tree.state[level]['list'], true)
+ else
+ out = out .. tpl.branch('list', tree.state[level]['list'], false)
+ out = out .. tpl.branch('field', tree.state[level]['field'], true)
+ end
+ return out
+end
+function tpl.print(text)
+
+ if options.channel == 'log' then
+ if not log then
+ log = io.open(tex.jobname .. '_nodetree.log', 'a')
+ end
+ log:write(text, '\n')
+ else
+ print(' ' .. text)
+ end
+end
+function tree.format_field(head, field)
+ local out = ''
+ if not head[field] or head[field] == 0 then
+ return ''
+ end
+ if options.verbosity < 2 and
+ -- glyph
+ field == 'font' or
+ field == 'left' or
+ field == 'right' or
+ field == 'uchyph' or
+ -- hlist
+ field == 'dir' or
+ field == 'glue_order' or
+ field == 'glue_sign' or
+ field == 'glue_set' or
+ -- glue
+ field == 'stretch_order' then
+ return ''
+ elseif options.verbosity < 3 and
+ field == 'prev' or
+ field == 'next' or
+ field == 'id'
+ then
+ return ''
+ end
+ if field == 'prev' or field == 'next' then
+ out = nodex.node_id(head[field])
+ elseif field == 'subtype' then
+ out = nodex.subtype(head)
+ elseif
+ field == 'width' or
+ field == 'height' or
+ field == 'depth' or
+ field == 'kern' or
+ field == 'shift' then
+ out = tpl.length(head[field])
+ elseif field == 'char' then
+ out = tpl.char(head[field])
+ elseif field == 'glue_set' then
+ out = tpl.round(head[field])
+ elseif field == 'stretch' or field == 'shrink' then
+ out = tpl.fill(head[field], head[field .. '_order'], field)
+ else
+ out = tostring(head[field])
+ end
+ return tpl.key_value(field, out)
+end
+function tree.set_state(level, connection_type, connection_state)
+ if not tree.state[level] then
+ tree.state[level] = {}
+ end
+ tree.state[level][connection_type] = connection_state
+end
+function tree.analyze_fields(fields, level)
+ local max = 0
+ local connection_state = ''
+ for _ in pairs(fields) do
+ max = max + 1
+ end
+ local count = 0
+ for field_name, recursion_node in pairs(fields) do
+ count = count + 1
+ if count == max then
+ connection_state = 'stop'
+ else
+ connection_state = 'continue'
+ end
+ tree.set_state(level, 'field', connection_state)
+ tpl.print(tpl.branches(level, 'field') .. tpl.key_value(field_name))
+ tree.analyze_list(recursion_node, level + 1)
+ end
+end
+function tree.analyze_node(head, level)
+ local connection_state
+ local out = ''
+ if head.next then
+ connection_state = 'continue'
+ else
+ connection_state = 'stop'
+ end
+ tree.set_state(level, 'list', connection_state)
+ out = tpl.branches(level, 'list')
+ .. tpl.type(node.type(head.id), head.id)
+ if options.verbosity > 1 then
+ out = out .. tpl.key_value('no', nodex.node_id(head))
+ end
+ local fields = {}
+ for field_id, field_name in pairs(node.fields(head.id, head.subtype)) do
+ if field_name ~= 'next' and
+ field_name ~= 'prev' and
+ node.is_node(head[field_name]) then
+ fields[field_name] = head[field_name]
+ else
+ out = out .. tree.format_field(head, field_name)
+ end
+ end
+ tpl.print(out)
+ tree.analyze_fields(fields, level)
+end
+function tree.analyze_list(head, level)
+ while head do
+ tree.analyze_node(head, level)
+ head = head.next
+ end
+end
+function tree.analyze_callback(head)
+ tree.analyze_list(head, 1)
+ tpl.print(tpl.line('short') .. '\n')
+end
+function callbacks.contribute_filter(extrainfo)
+ tpl.callback('contribute_filter', {extrainfo = extrainfo})
+ return true
+end
+function callbacks.buildpage_filter(extrainfo)
+ tpl.callback('buildpage_filter', {extrainfo = extrainfo})
+ return true
+end
+function callbacks.pre_linebreak_filter(head, groupcode)
+ tpl.callback('pre_linebreak_filter', {groupcode = groupcode})
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.linebreak_filter(head, is_display)
+ tpl.callback('linebreak_filter', {is_display = is_display})
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.append_to_vlist_filter(head, locationcode, prevdepth, mirrored)
+ local variables = {
+ locationcode = locationcode,
+ prevdepth = prevdepth,
+ mirrored = mirrored,
+ }
+ tpl.callback('append_to_vlist_filter', variables)
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.post_linebreak_filter(head, groupcode)
+ tpl.callback('post_linebreak_filter', {groupcode = groupcode})
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.hpack_filter(head, groupcode, size, packtype, direction, attributelist)
+ local variables = {
+ groupcode = groupcode,
+ size = size,
+ packtype = packtype,
+ direction = direction,
+ attributelist = attributelist,
+ }
+ tpl.callback('hpack_filter', variables)
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.vpack_filter(head, groupcode, size, packtype, maxdepth, direction, attributelist)
+ local variables = {
+ groupcode = groupcode,
+ size = size,
+ packtype = packtype,
+ maxdepth = tpl.length(maxdepth),
+ direction = direction,
+ attributelist = attributelist,
+ }
+ tpl.callback('vpack_filter', variables)
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.hpack_quality(incident, detail, head, first, last)
+ local variables = {
+ incident = incident,
+ detail = detail,
+ first = first,
+ last = last,
+ }
+ tpl.callback('hpack_quality', variables)
+ tree.analyze_callback(head)
+end
+function callbacks.vpack_quality(incident, detail, head, first, last)
+ local variables = {
+ incident = incident,
+ detail = detail,
+ first = first,
+ last = last,
+ }
+ tpl.callback('vpack_quality', variables)
+ tree.analyze_callback(head)
+end
+function callbacks.process_rule(head, width, height)
+ local variables = {
+ width = width,
+ height = height,
+ }
+ tpl.callback('process_rule', variables)
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.pre_output_filter(head, groupcode, size, packtype, maxdepth, direction)
+ local variables = {
+ groupcode = groupcode,
+ size = size,
+ packtype = packtype,
+ maxdepth = maxdepth,
+ direction = direction,
+ }
+ tpl.callback('pre_output_filter', variables)
+ tree.analyze_callback(head)
+ return true
+end
+function callbacks.hyphenate(head, tail)
+ tpl.callback('hyphenate')
+ tpl.print('head:')
+ tree.analyze_callback(head)
+ tpl.print('tail:')
+ tree.analyze_callback(tail)
+end
+function callbacks.ligaturing(head, tail)
+ tpl.callback('ligaturing')
+ tpl.print('head:')
+ tree.analyze_callback(head)
+ tpl.print('tail:')
+ tree.analyze_callback(tail)
+end
+function callbacks.kerning(head, tail)
+ tpl.callback('kerning')
+ tpl.print('head:')
+ tree.analyze_callback(head)
+ tpl.print('tail:')
+ tree.analyze_callback(tail)
+end
+function callbacks.insert_local_par(local_par, location)
+ tpl.callback('insert_local_par', {location = location})
+ tree.analyze_callback(local_par)
+ return true
+end
+function callbacks.mlist_to_hlist(head, display_type, need_penalties)
+ local variables = {
+ display_type = display_type,
+ need_penalties = need_penalties,
+ }
+ tpl.callback('mlist_to_hlist', variables)
+ tree.analyze_callback(head)
+ return node.mlist_to_hlist(head, display_type, need_penalties)
+end
+function base.normalize_options()
+ options.verbosity = tonumber(options.verbosity)
+ options.decimalplaces = tonumber(options.decimalplaces)
+end
+function base.set_default_options()
+ local defaults = {
+ verbosity = 1,
+ callback = 'postlinebreak',
+ engine = 'luatex',
+ color = 'colored',
+ decimalplaces = 2,
+ unit = 'pt',
+ channel = 'term',
+ }
+ if not options then
+ options = {}
+ end
+ for key, value in pairs(defaults) do
+ if not options[key] then
+ options[key] = value
+ end
+ end
+ base.normalize_options()
+end
+function base.set_option(key, value)
+ if not options then
+ options = {}
+ end
+ options[key] = value
+ base.normalize_options()
+end
+function base.get_option(key)
+ if not options then
+ options = {}
+ end
+ if options[key] then
+ return options[key]
+ end
+end
+function base.get_callback_name(alias)
+ if alias == 'contribute' or alias == 'contributefilter' then
+ return 'contribute_filter'
+ elseif alias == 'buildpage' or alias == 'buildpagefilter' then
+ return 'buildpage_filter'
+ elseif alias == 'preline' or alias == 'prelinebreakfilter' then
+ return 'pre_linebreak_filter'
+ elseif alias == 'line' or alias == 'linebreakfilter' then
+ return 'linebreak_filter'
+ elseif alias == 'append' or alias == 'appendtovlistfilter' then
+ return 'append_to_vlist_filter'
+ elseif alias == 'postline' or alias == 'postlinebreakfilter' then
+ return 'post_linebreak_filter'
+ elseif alias == 'hpack' or alias == 'hpackfilter' then
+ return 'hpack_filter'
+ elseif alias == 'vpack' or alias == 'vpackfilter' then
+ return 'vpack_filter'
+ elseif alias == 'hpackq' or alias == 'hpackquality' then
+ return 'hpack_quality'
+ elseif alias == 'vpackq' or alias == 'vpackquality' then
+ return 'vpack_quality'
+ elseif alias == 'process' or alias == 'processrule' then
+ return 'process_rule'
+ elseif alias == 'preout' or alias == 'preoutputfilter' then
+ return 'pre_output_filter'
+ elseif alias == 'hyph' or alias == 'hyphenate' then
+ return 'hyphenate'
+ elseif alias == 'liga' or alias == 'ligaturing' then
+ return 'ligaturing'
+ elseif alias == 'kern' or alias == 'kerning' then
+ return 'kerning'
+ elseif alias == 'insert' or alias == 'insertlocalpar' then
+ return 'insert_local_par'
+ elseif alias == 'mhlist' or alias == 'mlisttohlist' then
+ return 'mlist_to_hlist'
+ else
+ return 'post_linebreak_filter'
+ end
+end
+function base.register(cb)
+ if options.engine == 'lualatex' then
+ luatexbase.add_to_callback(cb, callbacks[cb], 'nodetree')
+ else
+ id, error = callback.register(cb, callbacks[cb])
+ end
+end
+function base.register_callbacks()
+ for alias in string.gmatch(options.callback, '([^,]+)') do
+ base.register(base.get_callback_name(alias))
+ end
+end
+function base.unregister(cb)
+ if options.engine == 'lualatex' then
+ luatexbase.remove_from_callback(cb, 'nodetree')
+ else
+ id, error = callback.register(cb, nil)
+ end
+end
+function base.unregister_callbacks()
+ for alias in string.gmatch(options.callback, '([^,]+)') do
+ base.unregister(base.get_callback_name(alias))
+ end
+end
+function base.execute()
+ local c = base.get_callback()
+ if options.engine == 'lualatex' then
+ luatexbase.add_to_callback(c, callbacks.post_linebreak_filter, 'nodetree')
+ else
+ id, error = callback.register(c, callbacks.post_linebreak_filter)
+ end
+end
+function base.analyze(head)
+ tpl.print('\n')
+ tree.analyze_list(head, 1)
+end
+return base
diff --git a/Master/texmf-dist/tex/luatex/nodetree/nodetree.tex b/Master/texmf-dist/tex/luatex/nodetree/nodetree.tex
new file mode 100644
index 00000000000..71373b5d716
--- /dev/null
+++ b/Master/texmf-dist/tex/luatex/nodetree/nodetree.tex
@@ -0,0 +1,47 @@
+%%
+%% This is file `nodetree.tex',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% nodetree.dtx (with options: `tex')
+%%
+%% This is a generated file.
+%%
+%% Copyright (C) 2016 by Josef Friedrich <josef@friedrich.rocks>
+%% ----------------------------------------------------------------------
+%% This work may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License, either version 1.3c 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 1.3c or later is part of all distributions of LaTeX
+%% version 2008/05/05 or later.
+%%
+\directlua{
+ nodetree = require('nodetree')
+ nodetree.set_option('engine', 'luatex')
+ nodetree.set_default_options()
+}
+\def\nodetreeoption[#1]#2{
+ \directlua{
+ nodetree.set_option('#1', '#2')
+ }
+}
+\def\nodetreeregister#1{
+ \directlua{
+ nodetree.set_option('callback', '#1')
+ nodetree.register_callbacks()
+ }
+}
+\def\nodetreeunregister#1{
+ \directlua{
+ nodetree.set_option('callback', '#1')
+ nodetree.unregister_callbacks()
+ }
+}
+\endinput
+%%
+%% End of file `nodetree.tex'.