From 3d6f98c4a37cc4b0e09f33032f93ed5063a7ea7c Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 12 Nov 2017 15:36:11 -0800
Subject: [PATCH] lua-filters.md doc: Added handout example.
---
doc/lua-filters.md | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/doc/lua-filters.md b/doc/lua-filters.md
index 0aed95cb5..ab6d221fa 100644
--- a/doc/lua-filters.md
+++ b/doc/lua-filters.md
@@ -362,6 +362,27 @@ function Note(el)
end
```
+## Creating a handout from a paper
+
+This filter extracts all the numbered examples, section
+headers, block quotes from a document, in addition to any
+divs with class `handout`:
+
+``` lua
+function Pandoc(doc)
+ local hblocks = {}
+ for i,el in pairs(doc.blocks) do
+ if (el.t == "Div" and el.classes[1] == "handout") or
+ (el.t == "BlockQuote") or
+ (el.t == "OrderedList" and el.style == "Example") or
+ (el.t == "Header") then
+ table.insert(hblocks, el)
+ end
+ end
+ return pandoc.Pandoc(hblocks, meta)
+end
+```
+
## Converting ABC code to music notation
This filter replaces code blocks with class `abc` with