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Code Issues Projects Releases Wiki Activity

general: suppress clang-tidy-21/22 warnings;

Browse Source 
some code fiddling on affected files
manual: use new lua filter "lua-crossrefs.lua" hacked from
  https://github.com/rnwst/pandoc-lua-crossrefs as replacement for
  tablenos which broke with pandoc 2.8.2 (get nicer output anyway);
  fix "excode39.svg" data $ -> # to avoid shell processing;
  document `ZBarcode_HaveGS1SyntaxEngine()`
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gitlost
2025-10-08 12:21:29 +01:00
parent d413255c93
commit a3cca33f32
30 changed files with 1645 additions and 1080 deletions
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
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The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
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necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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docs/lua-crossrefs/lua-crossrefs.lua Normal file
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-- libzint - the open source barcode library
-- Copyright (C) 2025 Robin Stuart <rstuart114@gmail.com>
-- Hacked from https://github.com/rnwst/pandoc-lua-crossrefs
-- © 2025 R. N. West. Released under the GPL version 2 or greater.
-- SPDX-License-Identifier: GPL-2.0-or-later
-- Hacked from "pandoc-lua-crossrefs/init.lua"
-- Table of Ids and corresponding cross-referenceable elements. To be populated
-- by various element numbering functions.
---@type table<string, {type: ('fig'|'tbl'), number: string, caption: string}>
IDs = {}
-- Hacked from "pandoc-lua-crossrefs/lib/crossrefs.lua"
---Check if AST element is a cross-reference (a cross-reference is a Span with class 'cross-ref').
---@param inline Inline
---@return boolean
local _is_crossref = function(inline)
local is_crossref_link = inline and inline.tag == 'Link' and inline.attributes['reference-type'] ~= nil
return is_crossref_link
end
---Parse a cross-reference in Pandoc's Markdown.
---@param str Str
---@return Inline[] | nil
local _parse_crossref = function(str)
local opening_bracket, prefix_suppressor, id, closing_bracket1, punctuation, closing_bracket2 =
str.text:match('^(%[?)(%-?)#([%a%d-_:%.]-)(%]?)([\\%.!:?,;)]-)(%]?)$')
if not id or id == '' then return end
local only_internal_punctuation = id:find('^[%a%d]+[%a%d%-_:%.]*[%a%d]+$') or id:find('^[%a%d]+$')
if not only_internal_punctuation then return end
if #closing_bracket1 ~= 0 and #closing_bracket2 ~= 0 then return end
local crossref = pandoc.Link({}, '#' .. id, '', pandoc.Attr('', {}, { ['reference-type'] = 'ref+label' }))
if prefix_suppressor == '-' then crossref.attributes['reference-type'] = 'ref' end
local elts = pandoc.List { crossref }
if opening_bracket == '[' then elts:insert(1, pandoc.Str('[')) end
if closing_bracket1 == ']' then elts:insert(pandoc.Str(']')) end
if punctuation ~= '' then elts:insert(pandoc.Str(punctuation)) end
if closing_bracket2 == ']' then elts:insert(pandoc.Str(']')) end
return elts
end
---Parse cross-references in Inlines.
---@param inlines Inlines
---@return (Inline[] | Inlines | nil), boolean?
local parse_crossrefs = function(inlines)
-- Parse cross-references into Links.
local new_inlines = inlines:walk { Str = _parse_crossref }
-- Early return if no cross-references were found!
if new_inlines == inlines then return end
inlines = new_inlines
-- Now separate out any opening or closing brackets in Strs into separate
-- Strs, in case crossref groups don't begin and end with cross-references.
inlines = inlines:walk {
Str = function(str)
if str.text:find('^%[.') then
return { pandoc.Str('['), pandoc.Str(str.text:sub(2)) }
elseif str.text:find('.%]$') then
return { pandoc.Str(str.text:sub(1, -2)), pandoc.Str(']') }
end
end,
}
-- Now create crossref groups. Crossref Groups are represented by Spans of
-- class 'cross-ref-group'.
---@type List<Inline>
new_inlines = pandoc.List {}
local i = 1
while inlines[i] do
if i < #inlines and inlines[i].tag == 'Str' and inlines[i].text == '[' then
---@type boolean
local at_least_one_crossref = false
---@type List<Inline>
local group_content = pandoc.List {}
---@type boolean
local group_valid = false
local j = i + 1
while inlines[j] do
local elt = inlines[j]
if elt.tag == 'Str' and elt.text == ']' then
if at_least_one_crossref then
group_valid = true
break
else
group_valid = false
break
end
-- Another opening bracket invalidates the group if no cross-reference has yet been
-- found. This ensures that the smallest possible Crossref Groups are created.
elseif elt.tag == 'Str' and elt.text == '[' and not at_least_one_crossref then
group_valid = false
break
else
if _is_crossref(elt) then at_least_one_crossref = true end
group_content:insert(inlines[j])
end
j = j + 1
if _is_crossref(elt) and inlines[j] and inlines[j].tag == 'Str' then
if inlines[j].text == ';' and inlines[j + 1] and inlines[j + 1].tag == 'Space' then
-- Skip punctuation following crossref if it is ';'.
j = j + 2
elseif inlines[j].text == '\\;' then
-- To still allow a semicolon to be used to separate cross-references, an
-- escaped semicolon is converted to a semicolon.
group_content:insert(pandoc.Str(';'))
j = j + 1
end
end
end
if group_valid then
-- Insert Crossref Group into inlines.
local crossref_group = pandoc.Span(group_content, pandoc.Attr('', { 'cross-ref-group' }))
new_inlines:insert(crossref_group)
i = j
else
new_inlines:insert(inlines[i])
end
else
new_inlines:insert(inlines[i])
end
i = i + 1
end
return new_inlines, false -- Nested cross-references are not allowed!
end
---Get cross-reference target
---@param crossref Link
---@return { type: 'fig'|'tbl', number: string, caption: string }
local _get_target = function(crossref) return IDs[crossref.target:sub(2)] end
---Resolve cross-reference.
---@param crossref Link cross-reference
---@param suppress_prefix? boolean whether to suppress prefixing the referenced object's type (e.g. 'Fig.' or 'Tbl.')
---@return Link
local _resolve_crossref = function(crossref, suppress_prefix)
local target = _get_target(crossref)
local crossref_text = ''
if target ~= nil then
if crossref.attributes['reference-type'] == 'ref+label' and not suppress_prefix then
if target.type == 'fig' then
crossref_text = 'Figure '
elseif target.type == 'tbl' then
crossref_text = 'Table '
end
end
crossref_text = crossref_text .. target.number .. ': ' .. target.caption
else
crossref_text = '??'
pandoc.log.warn('Cross-referenced element with id ' .. tostring(crossref.target) .. ' could not be resolved.')
end
local link = pandoc.Link(crossref_text, crossref.target)
link.attr = pandoc.Attr('', { 'cross-ref' })
return link
end
---Resolve single cross-references.
---@param link Link
---@return Link?
local write_crossref = function(link)
if _is_crossref(link) then return _resolve_crossref(link) end
end
-- Hacked from "pandoc-lua-crossrefs/lib/numbering.lua"
local figure_number = 0
local table_number = 0
---Number figure or table.
---@param fig_or_tbl (Figure | Table)
---@return (Figure | Table), false Numbered Figure or Table, or `nil` if unnumbered
---@overload fun(fig_or_tbl: Figure | Table): nil
local number_fig_or_tbl = function(fig_or_tbl)
if not fig_or_tbl.classes:includes('unnumbered') then
---@type string
local _type
---@type integer
local number
---@type string
local label_class
---@type fun(num: integer): string
local number_formatter = function(num) return tostring(num) end
---@type fun(num: integer): string
local label_formatter
---@type boolean
local colon_after_label = true
if fig_or_tbl.tag == 'Figure' then
_type = 'fig'
figure_number = figure_number + 1
number = figure_number
label_class = 'figure-label'
label_formatter = function(num) return string.format('Figure %s', num) end
end
if fig_or_tbl.tag == 'Table' then
_type = 'tbl'
table_number = table_number + 1
number = table_number
label_class = 'table-label'
label_formatter = function(num) return string.format('Table %s', num) end
end
---Add Fig or Tbl to table of Ids, prepend label to caption.
---@param elt (Figure | Table)
local function process_fig_or_tbl(elt)
if elt.identifier ~= '' then
local caption = pandoc.utils.stringify(elt.caption.long)
IDs[elt.identifier] = { type = _type, number = number_formatter(number), caption = caption }
end
local caption_prefix = pandoc.Span({ pandoc.Str(label_formatter(number)) }, pandoc.Attr('', { label_class }))
if FORMAT ~= 'latex' then
-- If figure or table caption is not empty, append colon to number.
if #elt.caption.long ~= 0 then
if colon_after_label then
caption_prefix.content[1].text = caption_prefix.content[1].text .. ':'
elt.caption.long[1].content:insert(1, pandoc.Space())
end
elt.caption.long[1].content:insert(1, caption_prefix)
else
elt.caption.long:insert(pandoc.Plain(caption_prefix))
end
end
end
process_fig_or_tbl(fig_or_tbl)
-- Number subfigs.
if _type == 'fig' then
number = 0
number_formatter = function(num) return figure_number .. label_formatter(num) end
label_formatter = function(num) return string.format('(%s)', string.char(96 + num)) end
colon_after_label = false
fig_or_tbl = fig_or_tbl:walk {
Figure = function(subfig)
number = number + 1
process_fig_or_tbl(subfig)
return subfig
end,
}
end
return fig_or_tbl, false -- Return `false` as second value to avoid processing subfigures again.
end
end
-- Hacked from "pandoc-lua-crossrefs/init.lua"
---@param doc Pandoc
function Pandoc(doc)
return doc
:walk({
Inlines = parse_crossrefs,
})
:walk({
-- Number cross-referenceable elements and construct table with Ids and numbers.
traverse = 'topdown', -- needed for subfigs
Figure = number_fig_or_tbl,
Table = number_fig_or_tbl,
})
:walk {
-- Resolve single cross-references.
Link = write_crossref,
}
end