source: trip-planner-front/node_modules/postcss-import/lib/parse-statements.js@ 6a80231

Last change on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 3.0 KB
Line 
1"use strict"
2
3// external tooling
4const valueParser = require("postcss-value-parser")
5
6// extended tooling
7const { stringify } = valueParser
8
9function split(params, start) {
10 const list = []
11 const last = params.reduce((item, node, index) => {
12 if (index < start) return ""
13 if (node.type === "div" && node.value === ",") {
14 list.push(item)
15 return ""
16 }
17 return item + stringify(node)
18 }, "")
19 list.push(last)
20 return list
21}
22
23module.exports = function (result, styles) {
24 const statements = []
25 let nodes = []
26
27 styles.each(node => {
28 let stmt
29 if (node.type === "atrule") {
30 if (node.name === "import") stmt = parseImport(result, node)
31 else if (node.name === "media") stmt = parseMedia(result, node)
32 else if (node.name === "charset") stmt = parseCharset(result, node)
33 }
34
35 if (stmt) {
36 if (nodes.length) {
37 statements.push({
38 type: "nodes",
39 nodes,
40 media: [],
41 })
42 nodes = []
43 }
44 statements.push(stmt)
45 } else nodes.push(node)
46 })
47
48 if (nodes.length) {
49 statements.push({
50 type: "nodes",
51 nodes,
52 media: [],
53 })
54 }
55
56 return statements
57}
58
59function parseMedia(result, atRule) {
60 const params = valueParser(atRule.params).nodes
61 return {
62 type: "media",
63 node: atRule,
64 media: split(params, 0),
65 }
66}
67
68function parseCharset(result, atRule) {
69 if (atRule.prev()) {
70 return result.warn("@charset must precede all other statements", {
71 node: atRule,
72 })
73 }
74 return {
75 type: "charset",
76 node: atRule,
77 media: [],
78 }
79}
80
81function parseImport(result, atRule) {
82 let prev = atRule.prev()
83 if (prev) {
84 do {
85 if (
86 prev.type !== "comment" &&
87 (prev.type !== "atrule" ||
88 (prev.name !== "import" && prev.name !== "charset"))
89 ) {
90 return result.warn(
91 "@import must precede all other statements (besides @charset)",
92 { node: atRule }
93 )
94 }
95 prev = prev.prev()
96 } while (prev)
97 }
98
99 if (atRule.nodes) {
100 return result.warn(
101 "It looks like you didn't end your @import statement correctly. " +
102 "Child nodes are attached to it.",
103 { node: atRule }
104 )
105 }
106
107 const params = valueParser(atRule.params).nodes
108 const stmt = {
109 type: "import",
110 node: atRule,
111 media: [],
112 }
113
114 // prettier-ignore
115 if (
116 !params.length ||
117 (
118 params[0].type !== "string" ||
119 !params[0].value
120 ) &&
121 (
122 params[0].type !== "function" ||
123 params[0].value !== "url" ||
124 !params[0].nodes.length ||
125 !params[0].nodes[0].value
126 )
127 ) {
128 return result.warn(`Unable to find uri in '${ atRule.toString() }'`, {
129 node: atRule,
130 })
131 }
132
133 if (params[0].type === "string") stmt.uri = params[0].value
134 else stmt.uri = params[0].nodes[0].value
135 stmt.fullUri = stringify(params[0])
136
137 if (params.length > 2) {
138 if (params[1].type !== "space") {
139 return result.warn("Invalid import media statement", { node: atRule })
140 }
141 stmt.media = split(params, 2)
142 }
143
144 return stmt
145}
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