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30 lines
1.1 KiB
Clojure
30 lines
1.1 KiB
Clojure
(ns frontend.util.list
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"High level list operations for use in editor"
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(:require [clojure.string :as string]))
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(defn- newline?
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[line]
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(or (= line "\n") (= line "\r\n")))
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(defn re-order-items
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[lines start-idx]
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(loop [lines lines
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idx start-idx
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result []
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double-newlines? false]
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(let [[line & others] lines]
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(if (empty? lines)
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(->> result
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(map (fn [line] (if (newline? line) "" line)))
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(string/join "\n"))
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(let [[_ num-str] (re-find #"^(\d+){1}\." line)
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num (if num-str (parse-long num-str) nil)
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double-newlines?' (or double-newlines?
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(and (newline? line) (seq others) (newline? (first others))))
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[idx' result'] (if (and (not double-newlines?') num)
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(let [idx' (inc idx)
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line' (string/replace-first line (str num ".") (str idx' "."))]
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[idx' (conj result line')])
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[idx (conj result line)])]
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(recur others idx' result' double-newlines?'))))))
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