blob: 3072c0a52b03c39e7bcf0b88dbaf65e60b493956 (
plain)
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
|
(define-module (vcomponent base)
:use-module (util)
:use-module (srfi srfi-1)
:use-module (srfi srfi-17)
:use-module (vcomponent primitive)
:use-module (ice-9 hash-table)
:use-module ((ice-9 optargs) :select (define*-public))
:re-export (add-child!))
;; vline → value
(define-public value
(make-procedure-with-setter
(lambda (vline) (struct-ref vline 0))
(lambda (vline value) (struct-set! vline 0 value))))
;; vcomponent x (or str symb) → vline
(define-public (attr* component attr)
(hash-ref (struct-ref component 3)
(as-string attr)))
;; vcomponent x (or str symb) → value
(define (get-attr component attr)
(and=> (attr* component attr)
value))
(define (set-attr! component attr value)
(aif (attr* component attr)
(struct-set! it 0 value)
(hash-set! (struct-ref component 3)
(as-string attr)
(make-vline value))))
(define-public attr
(make-procedure-with-setter
get-attr
set-attr!))
(define-public prop
(make-procedure-with-setter
(lambda (attr-obj prop-key)
(hash-ref (struct-ref attr-obj 1) prop-key))
(lambda (attr-obj prop-key val)
(hash-set! (struct-ref attr-obj 1) prop-key val))))
;; Returns the properties of attribute as an assoc list.
;; @code{(map car <>)} leads to available properties.
(define-public (properties attrptr)
(hash-map->list cons (struct-ref attrptr 1)))
(define-public type (make-procedure-with-setter
(lambda (c) (struct-ref c 0))
(lambda (c v) struct-set! c 0 v)
))
(define-public (parent c) (struct-ref c 2))
(define-public (attributes component)
(hash-map->list cons (struct-ref component 3)))
(define*-public (children component)
(struct-ref component 1))
(define (copy-vline vline)
(make-struct/no-tail (struct-vtable vline)
(struct-ref vline 0)
;; TODO deep-copy on properties?
(struct-ref vline 1)))
(define-public (copy-vcomponent component)
(make-struct/no-tail (struct-vtable component)
(struct-ref component 0)
(struct-ref component 1)
(struct-ref component 2)
(alist->hash-table
(hash-map->list (lambda (key value) (cons key (copy-vline value)))
(struct-ref component 3)))))
(define-public (extract field)
(lambda (e) (attr e field)))
(define-public (extract* field)
(lambda (e) (attr* e field)))
(define-public (key=? k1 k2)
(eq? (as-symb k1)
(as-symb k2)))
|
