Spaces:
Sleeping
Sleeping
File size: 4,000 Bytes
56fda74 |
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 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
import { compile } from 'stylis'
const haveSameLocation = (element1, element2) => {
return element1.line === element2.line && element1.column === element2.column
}
const isAutoInsertedRule = element =>
element.type === 'rule' &&
element.parent &&
haveSameLocation(element, element.parent)
const toInputTree = (elements, tree) => {
for (let i = 0; i < elements.length; i++) {
const element = elements[i]
const { parent, children } = element
if (!parent) {
tree.push(element)
} else if (!isAutoInsertedRule(element)) {
parent.children.push(element)
}
if (Array.isArray(children)) {
element.children = []
toInputTree(children, tree)
}
}
return tree
}
var stringifyTree = elements => {
return elements
.map(element => {
switch (element.type) {
case 'import':
case 'decl':
return element.value
case 'comm':
// When we encounter a standard multi-line CSS comment and it contains a '@'
// character, we keep the comment. Some Stylis plugins, such as
// the stylis-rtl via the cssjanus plugin, use this special comment syntax
// to control behavior (such as: /* @noflip */). We can do this
// with standard CSS comments because they will work with compression,
// as opposed to non-standard single-line comments that will break compressed CSS.
return element.props === '/' && element.value.includes('@')
? element.value
: ''
case 'rule':
return `${element.value.replace(/&\f/g, '&')}{${stringifyTree(
element.children
)}}`
default: {
return `${element.value}{${stringifyTree(element.children)}}`
}
}
})
.join('')
}
const interleave = (strings /*: Array<*> */, interpolations /*: Array<*> */) =>
interpolations.reduce(
(array, interp, i) => array.concat([interp], strings[i + 1]),
[strings[0]]
)
function getDynamicMatches(str /*: string */) {
const re = /xxx(\d+):xxx/gm
let match
const matches = []
while ((match = re.exec(str)) !== null) {
if (match !== null) {
matches.push({
value: match[0],
p1: parseInt(match[1], 10),
index: match.index
})
}
}
return matches
}
function replacePlaceholdersWithExpressions(
str /*: string */,
expressions /*: Array<*> */,
t
) {
const matches = getDynamicMatches(str)
if (matches.length === 0) {
if (str === '') {
return []
}
return [t.stringLiteral(str)]
}
const strings = []
const finalExpressions = []
let cursor = 0
matches.forEach(({ value, p1, index }, i) => {
const preMatch = str.substring(cursor, index)
cursor = cursor + preMatch.length + value.length
if (!preMatch && i === 0) {
strings.push(t.stringLiteral(''))
} else {
strings.push(t.stringLiteral(preMatch))
}
finalExpressions.push(expressions[p1])
if (i === matches.length - 1) {
strings.push(t.stringLiteral(str.substring(index + value.length)))
}
})
return interleave(strings, finalExpressions).filter(
(node /*: { value: string } */) => {
return node.value !== ''
}
)
}
function createRawStringFromTemplateLiteral(
quasi /*: {
quasis: Array<{ value: { cooked: string } }>
} */
) {
let strs = quasi.quasis.map(x => x.value.cooked)
const src = strs
.reduce((arr, str, i) => {
arr.push(str)
if (i !== strs.length - 1) {
arr.push(`xxx${i}:xxx`)
}
return arr
}, [])
.join('')
.trim()
return src
}
export default function minify(path, t) {
const quasi = path.node.quasi
const raw = createRawStringFromTemplateLiteral(quasi)
const minified = stringifyTree(toInputTree(compile(raw), []))
const expressions = replacePlaceholdersWithExpressions(
minified,
quasi.expressions || [],
t
)
path.replaceWith(t.callExpression(path.node.tag, expressions))
}
|