66 lines
1.5 KiB
Lua
66 lines
1.5 KiB
Lua
local system = require 'pandoc.system'
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local tikz_doc_template = [[
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\documentclass{standalone}
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\usepackage[pdftex]{graphics}
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\usepackage[pdftex]{graphicx}
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\usepackage{xcolor}
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\usepackage{tikz}
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\begin{document}
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\nopagecolor
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%s
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\end{document}
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]]
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local function tikz2image(src, filetype, outfile)
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system.with_temporary_directory('tikz2image', function (tmpdir)
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system.with_working_directory(tmpdir, function()
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local f = io.open('tikz.tex', 'w')
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f:write(tikz_doc_template:format(src))
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f:close()
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os.execute('pdflatex tikz.tex >/dev/null 2>&1')
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if filetype == 'pdf' then
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os.rename('tikz.pdf', outfile)
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else
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os.execute('pdf2svg tikz.pdf ' .. outfile .. '>/dev/null 2>&1')
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end
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end)
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end)
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end
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extension_for = {
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html = 'svg',
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html4 = 'svg',
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html5 = 'svg',
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latex = 'pdf',
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beamer = 'pdf' }
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local function file_exists(name)
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local f = io.open(name, 'r')
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if f ~= nil then
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io.close(f)
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return true
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else
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return false
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end
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end
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local function starts_with(start, str)
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return str:sub(1, #start) == start
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end
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function RawBlock(el)
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if starts_with('\\begin{tikzpicture}', el.text) then
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local filetype = extension_for[FORMAT] or 'svg'
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local fbasename = pandoc.sha1(el.text) .. '.' .. filetype
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local fname = system.get_working_directory() .. '/' .. fbasename
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if not file_exists(fname) then
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tikz2image(el.text, filetype, fname)
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end
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return pandoc.Para({pandoc.Image({}, fbasename)})
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else
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return el
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end
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end
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