--[[ pagebreak – convert raw LaTeX page breaks to other formats Copyright © 2017-2021 Benct Philip Jonsson, Albert Krewinkel Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ]] local stringify_orig = (require 'pandoc.utils').stringify local function stringify(x) return type(x) == 'string' and x or stringify_orig(x) end --- configs – these are populated in the Meta filter. local pagebreak = { asciidoc = '<<<\n\n', context = '\\page', epub = '

', html = '
', latex = '\\newpage{}', ms = '.bp', ooxml = '', odt = '' } local function pagebreaks_from_config (meta) local html_class = (meta.newpage_html_class and stringify(meta.newpage_html_class)) or os.getenv 'PANDOC_NEWPAGE_HTML_CLASS' if html_class and html_class ~= '' then pagebreak.html = string.format('
', html_class) end local odt_style = (meta.newpage_odt_style and stringify(meta.newpage_odt_style)) or os.getenv 'PANDOC_NEWPAGE_ODT_STYLE' if odt_style and odt_style ~= '' then pagebreak.odt = string.format('', odt_style) end end --- Return a block element causing a page break in the given format. local function newpage(format) if format:match 'asciidoc' then return pandoc.RawBlock('asciidoc', pagebreak.asciidoc) elseif format == 'context' then return pandoc.RawBlock('context', pagebreak.context) elseif format == 'docx' then return pandoc.RawBlock('openxml', pagebreak.ooxml) elseif format:match 'epub' then return pandoc.RawBlock('html', pagebreak.epub) elseif format:match 'html.*' then return pandoc.RawBlock('html', pagebreak.html) elseif format:match 'latex' then return pandoc.RawBlock('tex', pagebreak.latex) elseif format:match 'ms' then return pandoc.RawBlock('ms', pagebreak.ms) elseif format:match 'odt' then return pandoc.RawBlock('opendocument', pagebreak.odt) else -- fall back to insert a form feed character return pandoc.Para{pandoc.Str '\f'} end end local function is_newpage_command(command) return command:match '^\\newpage%{?%}?$' or command:match '^\\pagebreak%{?%}?$' end -- Filter function called on each RawBlock element. function RawBlock (el) -- Don't do anything if the output is TeX if FORMAT:match 'tex$' then return nil end -- check that the block is TeX or LaTeX and contains only -- \newpage or \pagebreak. if el.format:match 'tex' and is_newpage_command(el.text) then -- use format-specific pagebreak marker. FORMAT is set by pandoc to -- the targeted output format. return newpage(FORMAT) end -- otherwise, leave the block unchanged return nil end -- Turning paragraphs which contain nothing but a form feed -- characters into line breaks. function Para (el) if #el.content == 1 and el.content[1].text == '\f' then return newpage(FORMAT) end end return { {Meta = pagebreaks_from_config}, {RawBlock = RawBlock, Para = Para} }