-
Notifications
You must be signed in to change notification settings - Fork 51
/
zipper-text.clj
93 lines (74 loc) · 3.28 KB
/
zipper-text.clj
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
(require '[clojure.zip :as zip])
(def flatten-zipper
(fn [so-far zipper]
(cond (zip/end? zipper)
so-far
(zip/branch? zipper)
(flatten-zipper so-far (zip/next zipper))
:else
(flatten-zipper (cons (zip/node zipper) so-far)
(zip/next zipper)))))
(def flattenize
(fn [tree]
(reverse (flatten-zipper '() (zip/seq-zip tree)))))
(def tumult-just-plus
(fn [form]
(letfn [(helper [zipper]
(cond (zip/end? zipper)
zipper
(= (zip/node zipper) '+)
(-> zipper
(zip/replace 'PLUS)
zip/next
helper)
:else
(-> zipper zip/next helper)))]
(-> form zip/seq-zip helper zip/root))))
(def tumult-append-node
(fn [form]
(letfn [(helper [zipper]
(cond (zip/end? zipper)
zipper
(= (zip/node zipper) '+)
(-> zipper
(zip/replace 'PLUS)
zip/next
helper)
(and (zip/branch? zipper)
(= (-> zipper zip/down zip/node) '-))
(-> zipper
(zip/append-child 55555)
zip/next
helper)
:else
(-> zipper zip/next helper)))]
(-> form zip/seq-zip helper zip/root))))
(def tumult-flip-args
(fn [form]
(letfn [(helper [zipper]
(cond (zip/end? zipper)
zipper
(= (zip/node zipper) '+)
(-> zipper
(zip/replace 'PLUS)
zip/next
helper)
(and (zip/branch? zipper)
(= (-> zipper zip/down zip/node) '-))
(-> zipper
(zip/append-child 55555)
zip/next
helper)
(= (zip/node zipper) '/)
(-> zipper
zip/right
zip/remove
zip/right
zip/remove
(zip/insert-right (-> zipper zip/right zip/node))
(zip/insert-right (-> zipper zip/right zip/right zip/node))
zip/next
helper)
:else
(-> zipper zip/next helper)))]
(-> form zip/seq-zip helper zip/root))))