meissa/cryogen-core
6
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Enable multilevel table of contents

Browse source
This commit is contained in:
Martin Kremers 2014-12-14 15:07:25 +01:00
parent d9fe01d8f6
commit 714f5c838d
1 changed files with 15 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
src/cryogen_core/toc.clj
View file

@ -2,10 +2,13 @@
(:require [crouton.html :as html] (:require [crouton.html :as html]
[hiccup.core :as hiccup])) [hiccup.core :as hiccup]))
(def _h [:h1 :h2 :h3 :h4 :h5 :h6])
(defn- compare_index [i1 i2] (- (.indexOf _h i2) (.indexOf _h i1)))
(defn get-headings [content] (defn get-headings [content]
(reduce (reduce
(fn [headings {:keys [tag attrs content] :as elm}] (fn [headings {:keys [tag attrs content] :as elm}]
(if (some #{tag} [:h1 :h2 :h3]) (if (some #{tag} _h)
(conj headings elm) (conj headings elm)
(if-let [more-headings (get-headings content)] (if-let [more-headings (get-headings content)]
(into headings more-headings) (into headings more-headings)
@ -13,9 +16,16 @@
[] content)) [] content))
(defn make-links [headings] (defn make-links [headings]
(into [:ol.contents] (loop [items headings acc nil _last nil]
(for [{[{{name :name} :attrs} title] :content} headings] (if-let [{tag :tag [{{name :name} :attrs} title] :content} (first items)]
[:li [:a {:href (str "#" name)} title]]))) (if (nil? name) (recur (rest items) acc nil)
(let [entry [:li [:a {:href (str "#" name)} title]]
jump (compare_index _last tag)]
(cond (> jump 0) (recur (rest items) (str acc "<ol>" (hiccup/html entry)) tag)
(= jump 0) (recur (rest items) (str acc (hiccup/html entry)) tag)
(< jump 0) (recur (rest items) (str acc (apply str (repeat (* -1 jump) "</ol>"))
(hiccup/html entry)) tag))))
(str acc "</ol>"))))
(defn generate-toc [html] (defn generate-toc [html]
(-> html (-> html
@ -25,4 +35,4 @@
:content :content
(get-headings) (get-headings)
(make-links) (make-links)
(hiccup/html))) (clojure.string/replace-first #"ol" "ol class=\"contents\"")))