Mercurial > prosody-modules
view mod_latex/mod_latex.lua @ 4537:53ee391ca689
mod_smacks: Fix traceback due to session being destroyed in send()
Sending something can cause the OS to notice that the connection is dead
and then the connection can be dead at this point. More likely if
opportunistic_writes is enabled.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 01 Apr 2021 11:35:26 +0200 |
parents | df8da7e4c2bf |
children |
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local st = require "stanza"; local urlencode = require "net.http".urlencode; local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im"; local xmlns_xhtml = "http://www.w3.org/1999/xhtml"; local function replace_latex(data) local origin, stanza = data.origin, data.stanza; local body = stanza:get_child_text("body"); if not body or not body:match("%$%$") then return; end module:log("debug", "Replacing latex..."); local html = st.stanza("html", { xmlns = xmlns_xhtmlim }) :tag("body", { xmlns = xmlns_xhtml }); local in_latex, last_char; for snippet, up_to in body:gmatch("(.-)%$%$()") do last_char = up_to; if in_latex then -- Render latex and add image, next snippet is text in_latex = nil; html:tag("img", { src = "http://www.mathtran.org/cgi-bin/mathtran?D=2;tex="..urlencode(snippet), alt = snippet }):up(); else -- Add text to HTML, next snippet is latex in_latex = true; html:tag("span"):text(snippet):up(); end end if last_char < #body then html:tag("span"):text(body:sub(last_char, #body)):up(); end for n, tag in ipairs(stanza.tags) do module:log("debug", "Tag: %s|%s", tag.attr.xmlns or "", tag.name or ""); if tag.name == "html" and tag.attr.xmlns == xmlns_xhtmlim then stanza.tags[n] = html; for n, child in ipairs(stanza) do if child == tag then stanza[n] = html; end end return; end end stanza[#stanza+1] = html; stanza.tags[#stanza.tags+1] = html; end module:hook("message/bare", replace_latex, 30); module:hook("message/full", replace_latex, 30);