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comparison vendor/github.com/yosssi/gcss/selector.go @ 66:787b5ee0289d draft

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Use vendored modules Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>
author yakumo.izuru
date Sun, 23 Jul 2023 13:18:53 +0000
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65:6d985efa0f7a 66:787b5ee0289d
1 package gcss
2
3 import (
4 "bytes"
5 "fmt"
6 "io"
7 "strings"
8 )
9
10 // selector represents a selector of CSS.
11 type selector struct {
12 elementBase
13 name string
14 }
15
16 // WriteTo writes the selector to the writer.
17 func (sel *selector) WriteTo(w io.Writer) (int64, error) {
18 return sel.writeTo(w, nil)
19 }
20
21 // writeTo writes the selector to the writer.
22 func (sel *selector) writeTo(w io.Writer, params map[string]string) (int64, error) {
23 bf := new(bytes.Buffer)
24
25 // Write the declarations.
26 if len(sel.decs) > 0 || sel.hasMixinDecs() {
27 bf.WriteString(sel.names())
28 bf.WriteString(openBrace)
29
30 // Writing to the bytes.Buffer never returns an error.
31 sel.writeDecsTo(bf, params)
32
33 bf.WriteString(closeBrace)
34 }
35
36 // Write the child selectors.
37 for _, childSel := range sel.sels {
38 // Writing to the bytes.Buffer never returns an error.
39 childSel.writeTo(bf, params)
40 }
41
42 // Write the mixin's selectors.
43 for _, mi := range sel.mixins {
44 sels, prms := mi.selsParams()
45
46 for _, sl := range sels {
47 sl.parent = sel
48 // Writing to the bytes.Buffer never returns an error.
49 sl.writeTo(bf, prms)
50 }
51 }
52
53 n, err := w.Write(bf.Bytes())
54
55 return int64(n), err
56 }
57
58 // names returns the selector names.
59 func (sel *selector) names() string {
60 bf := new(bytes.Buffer)
61
62 switch parent := sel.parent.(type) {
63 case nil, *atRule:
64 for _, name := range strings.Split(sel.name, comma) {
65 if bf.Len() > 0 {
66 bf.WriteString(comma)
67 }
68
69 bf.WriteString(strings.TrimSpace(name))
70 }
71 case *selector:
72 for _, parentS := range strings.Split(parent.names(), comma) {
73 for _, s := range strings.Split(sel.name, comma) {
74 if bf.Len() > 0 {
75 bf.WriteString(comma)
76 }
77
78 s = strings.TrimSpace(s)
79
80 if strings.Index(s, ampersand) != -1 {
81 bf.WriteString(strings.Replace(s, ampersand, parentS, -1))
82 } else {
83 bf.WriteString(parentS)
84 bf.WriteString(space)
85 bf.WriteString(s)
86 }
87 }
88 }
89 }
90
91 return bf.String()
92 }
93
94 // newSelector creates and returns a selector.
95 func newSelector(ln *line, parent element) (*selector, error) {
96 name := strings.TrimSpace(ln.s)
97
98 if strings.HasSuffix(name, openBrace) {
99 return nil, fmt.Errorf("selector must not end with %q [line: %d]", openBrace, ln.no)
100 }
101
102 if strings.HasSuffix(name, closeBrace) {
103 return nil, fmt.Errorf("selector must not end with %q [line: %d]", closeBrace, ln.no)
104 }
105
106 return &selector{
107 elementBase: newElementBase(ln, parent),
108 name: name,
109 }, nil
110 }