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annotate mod_latex/mod_latex.lua @ 5296:0f5657db1cfc

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mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parents df8da7e4c2bf
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 local st = require "stanza";
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2 local urlencode = require "net.http".urlencode;
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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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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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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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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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38 if tag.name == "html" and tag.attr.xmlns == xmlns_xhtmlim then
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39 stanza.tags[n] = html;
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40 for n, child in ipairs(stanza) do
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41 if child == tag then
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42 stanza[n] = html;
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43 end
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44 end
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45 return;
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46 end
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47 end
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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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53 module:hook("message/bare", replace_latex, 30);
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54 module:hook("message/full", replace_latex, 30);