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annotate mod_latex/mod_latex.lua @ 5491:7842502c1157

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mod_http_debug: Log some extended info about requests If you point something external at this module, you don't get the response body back, hence it can be useful to see some details in the log as well.
author Kim Alvefur <zash@zash.se>
date Fri, 26 May 2023 15:37:15 +0200
parents df8da7e4c2bf
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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e190c1643a8f mod_latex: New (well, kind of) module for rendering LaTeX in messages and replacing with a rendered embedded image
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1 local st = require "stanza";
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2 local urlencode = require "net.http".urlencode;
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3
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4 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
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5 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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7 local function replace_latex(data)
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8 local origin, stanza = data.origin, data.stanza;
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9 local body = stanza:get_child_text("body");
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10 if not body or not body:match("%$%$") then
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11 return;
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12 end
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df8da7e4c2bf mod_latex: Log debug message when actually deciding to do LaTeX replacing
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13 module:log("debug", "Replacing latex...");
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14
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15 local html = st.stanza("html", { xmlns = xmlns_xhtmlim })
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16 :tag("body", { xmlns = xmlns_xhtml });
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17
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18 local in_latex, last_char;
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19 for snippet, up_to in body:gmatch("(.-)%$%$()") do
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20 last_char = up_to;
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21 if in_latex then
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22 -- Render latex and add image, next snippet is text
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23 in_latex = nil;
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24 html:tag("img", { src = "http://www.mathtran.org/cgi-bin/mathtran?D=2;tex="..urlencode(snippet), alt = snippet }):up();
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25 else
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26 -- Add text to HTML, next snippet is latex
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27 in_latex = true;
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28 html:tag("span"):text(snippet):up();
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30 end
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31 end
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32 if last_char < #body then
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33 html:tag("span"):text(body:sub(last_char, #body)):up();
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34 end
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35
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36 for n, tag in ipairs(stanza.tags) do
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37 module:log("debug", "Tag: %s|%s", tag.attr.xmlns or "", tag.name or "");
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parents:
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38 if tag.name == "html" and tag.attr.xmlns == xmlns_xhtmlim then
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parents:
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39 stanza.tags[n] = html;
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parents:
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40 for n, child in ipairs(stanza) do
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Matthew Wild <mwild1@gmail.com>
parents:
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41 if child == tag then
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parents:
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42 stanza[n] = html;
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43 end
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Matthew Wild <mwild1@gmail.com>
parents:
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44 end
e190c1643a8f mod_latex: New (well, kind of) module for rendering LaTeX in messages and replacing with a rendered embedded image
Matthew Wild <mwild1@gmail.com>
parents:
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45 return;
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Matthew Wild <mwild1@gmail.com>
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46 end
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Matthew Wild <mwild1@gmail.com>
parents:
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47 end
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48
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parents:
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49 stanza[#stanza+1] = html;
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50 stanza.tags[#stanza.tags+1] = html;
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51 end
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Matthew Wild <mwild1@gmail.com>
parents:
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Matthew Wild <mwild1@gmail.com>
parents:
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53 module:hook("message/bare", replace_latex, 30);
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parents:
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54 module:hook("message/full", replace_latex, 30);