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janet/doc/gendoc.janet
2018-12-16 13:17:30 -05:00

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# Generate documentation
(def- prelude
```
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Janet Language Documentation</title>
<meta name="description" content="API Documentation for the janet programming language.">
</head>
```)
(def- postlude
```
</html>
```)
(def- escapes
{10 "<br>"
09 "&nbsp;&nbsp;&nbsp;&nbsp;"
38 "&amp;"
60 "&lt;"
62 "&gt;"
34 "&quot;"
39 "&#39;"
47 "&#47;"})
(defn- trim-lead
"Trim leading newlines"
[str]
(var i 0)
(while (= 10 str.i) (++ i))
(string/slice str i))
(defn- html-escape
"Escape special characters for HTML encoding."
[str]
(def buf @"")
(loop [byte :in str]
(if-let [rep escapes.byte]
(buffer/push-string buf rep)
(buffer/push-byte buf byte)))
buf)
(defn- gen-one
"Generate documentation for a binding. Returns an
html fragment."
[key docstring]
(if-let [index (string/find "\n" docstring)]
(let [first-line (html-escape (string/slice docstring 0 index))
rest (html-escape (trim-lead (string/slice docstring (inc index))))]
(string "<h2>" first-line "</h2>\n"
"<p>" rest "</p>\n"))
(string "<h2>" (html-escape key) "</h2>\n"
"<p>" (html-escape docstring) "</p>\n")))
# Generate parts and print them to stdout
(def parts (seq [[k {:doc d :private p}]
:in (sort (pairs (table/getproto _env)))
:when (and d (not p))]
(gen-one k d)))
(print prelude ;parts postlude)