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texformats.jl
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texformats.jl
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# Tex
# ---
abstract type TexFormat <: WeaveFormat end
function set_rendering_options!(docformat::TexFormat; keep_unicode = false, template=nothing, kwargs...)
docformat.keep_unicode |= keep_unicode
docformat.template = get_tex_template(template)
end
function formatfigures(chunk, docformat::TexFormat)
fignames = chunk.figures
caption = chunk.options[:fig_cap]
width = chunk.options[:out_width]
height = chunk.options[:out_height]
f_pos = chunk.options[:fig_pos]
f_env = chunk.options[:fig_env]
result = ""
figstring = ""
if isnothing(f_env) && !isnothing(caption)
f_env = "figure"
end
(isnothing(f_pos)) && (f_pos = "!h")
# Set size
attribs = ""
isnothing(width) || (attribs = "width=$(md_length_to_latex(width,"\\linewidth"))")
(!isempty(attribs) && !isnothing(height)) && (attribs *= ",")
isnothing(height) || (attribs *= "height=$(md_length_to_latex(height,"\\paperheight"))")
if !isnothing(f_env)
result *= "\\begin{$f_env}"
(!isempty(f_pos)) && (result *= "[$f_pos]")
result *= "\n"
end
for fig in fignames
if splitext(fig)[2] == ".tex" # Tikz figures
figstring *= "\\resizebox{$width}{!}{\\input{$fig}}\n"
else
if isempty(attribs)
figstring *= "\\includegraphics{$fig}\n"
else
figstring *= "\\includegraphics[$attribs]{$fig}\n"
end
end
end
# Figure environment
if !isnothing(caption)
result *= string("\\center\n", "$figstring", "\\caption{$caption}\n")
else
result *= figstring
end
if !isnothing(chunk.options[:label]) && !isnothing(f_env)
label = chunk.options[:label]
result *= "\\label{fig:$label}\n"
end
if !isnothing(f_env)
result *= "\\end{$f_env}\n"
end
return result
end
function md_length_to_latex(def, reference)
if occursin("%", def)
_def = tryparse(Float64, replace(def, "%" => ""))
isnothing(_def) && return def
perc = round(_def / 100, digits = 2)
return "$perc$reference"
end
return def
end
# plain Tex
# ---------
Base.@kwdef mutable struct Tex <: TexFormat
description = "Latex with custom code environments"
extension = "tex"
codestart = "\\begin{juliacode}"
codeend = "\\end{juliacode}"
termstart = "\\begin{juliaterm}"
termend = "\\end{juliaterm}"
outputstart = "\\begin{juliaout}"
outputend = "\\end{juliaout}"
mimetypes = ["application/pdf", "image/png", "text/latex", "text/plain"]
fig_ext = ".pdf"
out_width = "\\linewidth"
out_height = nothing
fig_pos = "htpb"
fig_env = "figure"
# specials
keep_unicode = false
template = nothing
tex_deps = ""
end
register_format!("tex", Tex())
# minted Tex
# ----------
Base.@kwdef mutable struct TexMinted <: TexFormat
description = "Latex using minted for highlighting"
extension = "tex"
codestart = "\\begin{minted}[escapeinside=||, mathescape, fontsize=\\small, xleftmargin=0.5em]{julia}"
codeend = "\\end{minted}"
termstart = "\\begin{minted}[escapeinside=||, mathescape, fontsize=\\footnotesize, xleftmargin=0.5em]{jlcon}"
termend = "\\end{minted}"
outputstart = "\\begin{minted}[escapeinside=||, mathescape, fontsize=\\small, xleftmargin=0.5em, frame = leftline]{text}"
outputend = "\\end{minted}"
mimetypes = ["application/pdf", "image/png", "text/latex", "text/plain"]
fig_ext = ".pdf"
out_width = "\\linewidth"
out_height = nothing
fig_pos = "htpb"
fig_env = "figure"
# specials
keep_unicode = false
template = nothing
tex_deps = "\\usepackage{minted}"
end
register_format!("texminted", TexMinted())
# Tex (directly to PDF)
# ---------------------
Base.@kwdef mutable struct JMarkdown2tex <: TexFormat
description = "Julia markdown to latex"
extension = "tex"
codestart = ""
codeend = ""
termstart = codestart
termend = codeend
outputstart = "\\begin{lstlisting}"
outputend = "\\end{lstlisting}\n"
mimetypes = ["application/pdf", "image/png", "image/jpg",
"text/latex", "text/markdown", "text/plain"]
fig_ext = ".pdf"
out_width = "\\linewidth"
out_height = nothing
fig_pos = nothing
fig_env = nothing
# specials
highlight_theme = nothing
template = nothing
keep_unicode = false
tex_deps = ""
end
register_format!("md2tex", JMarkdown2tex())
register_format!("md2pdf", JMarkdown2tex())
function set_rendering_options!(docformat::JMarkdown2tex; template = nothing, highlight_theme = nothing, keep_unicode = false, kwargs...)
docformat.template = get_tex_template(template)
docformat.highlight_theme = get_highlight_theme(highlight_theme)
docformat.keep_unicode |= keep_unicode
end
get_tex_template(::Nothing) = get_template(normpath(TEMPLATE_DIR, "md2pdf.tpl"))
get_tex_template(x) = get_template(x)
function render_doc(docformat::TexFormat, body, doc)
return Mustache.render(
docformat.template;
body = body,
highlight = "",
tex_deps = docformat.tex_deps,
[Pair(Symbol(k), v) for (k, v) in doc.header]...,
)
end
function render_doc(docformat::JMarkdown2tex, body, doc)
return Mustache.render(
docformat.template;
body = body,
highlight = get_highlight_stylesheet(MIME("text/latex"), docformat.highlight_theme),
tex_deps = docformat.tex_deps,
[Pair(Symbol(k), v) for (k, v) in doc.header]...,
)
end
# very similar to export to html
function format_chunk(chunk::DocChunk, docformat::TexFormat)
out = IOBuffer()
io = IOBuffer()
for inline in chunk.content
if isa(inline, InlineText)
write(io, inline.content)
elseif !isempty(inline.rich_output)
clear_buffer_and_format!(io, out, WeaveMarkdown.latex)
write(out, addlines(inline.rich_output, inline))
elseif !isempty(inline.figures)
write(io, inline.figures[end], inline)
elseif !isempty(inline.output)
write(io, addlines(inline.output, inline))
end
end
clear_buffer_and_format!(io, out, WeaveMarkdown.latex)
out = take2string!(out)
return docformat.keep_unicode ? out : uc2tex(docformat, out)
end
function format_output(result, docformat::TexFormat)
docformat.keep_unicode || return uc2tex(docformat, result, true)
return result
end
function format_output(result, docformat::JMarkdown2tex)
# Highligts has some extra escaping defined, eg of $, ", ...
result_escaped = sprint(
(io, x) ->
Highlights.Format.escape(io, MIME("text/latex"), x, charescape = true),
result,
)
docformat.keep_unicode || return uc2tex(docformat, result_escaped, true)
return result_escaped
end
function format_code(code, docformat::TexFormat)
docformat.keep_unicode || return uc2tex(docformat, code, true)
return ret
end
function format_code(code, docformat::JMarkdown2tex)
ret = highlight_code(MIME("text/latex"), code, docformat.highlight_theme)
docformat.keep_unicode || return uc2tex(docformat, ret, false)
return ret
end
# Convert unicode to tex, escape listings if needed
function uc2tex(::JMarkdown2tex, s, escape = false)
for key in keys(latex_symbols)
if escape
s = replace(s, latex_symbols[key] => "(*@\\ensuremath{$(texify(key))}@*)")
else
s = replace(s, latex_symbols[key] => "\\ensuremath{$(texify(key))}")
end
end
return s
end
# Convert unicode to tex, escape listings if needed
function uc2tex(::TexFormat, s, escape = false)
for key in keys(latex_symbols)
if escape
s = replace(s, latex_symbols[key] => "|\$\\ensuremath{$(texify(key))}\$|")
else
s = replace(s, latex_symbols[key] => "\\ensuremath{$(texify(key))}")
end
end
return s
end
format_termchunk(chunk, docformat::TexFormat) =
string(docformat.termstart, chunk.output, docformat.termend, "\n")
format_termchunk(chunk, docformat::JMarkdown2tex) =
should_render(chunk) ? highlight_term(MIME("text/latex"), chunk.output, docformat.highlight_theme) : ""
# Make julia symbols (\bf* etc.) valid latex
function texify(s)
return if occursin(r"^\\bf[A-Z]$", s)
replace(s, "\\bf" => "\\bm{\\mathrm{") * "}}"
elseif startswith(s, "\\bfrak")
replace(s, "\\bfrak" => "\\bm{\\mathfrak{") * "}}"
elseif startswith(s, "\\bf")
replace(s, "\\bf" => "\\bm{\\") * "}"
elseif startswith(s, "\\frak")
replace(s, "\\frak" => "\\mathfrak{") * "}"
else
s
end
end