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

import { TextDocument, Range, Position } from 'vscode-languageserver'
import { DocumentClassName, DocumentClassList } from './state'
import lineColumn from 'line-column'

export function findAll(re: RegExp, str: string): RegExpMatchArray[] {
  let match: RegExpMatchArray
  let matches: RegExpMatchArray[] = []
  while ((match = re.exec(str)) !== null) {
    matches.push({ ...match })
  }
  return matches
}

export function findLast(re: RegExp, str: string): RegExpMatchArray {
  const matches = findAll(re, str)
  if (matches.length === 0) {
    return null
  }
  return matches[matches.length - 1]
}

export function arrFindLast<T>(arr: T[], predicate: (item: T) => boolean): T {
  for (let i = arr.length - 1; i >= 0; --i) {
    const x = arr[i]
    if (predicate(x)) {
      return x
    }
  }
  return null
}

enum Quote {
  SINGLE = "'",
  DOUBLE = '"',
  TICK = '`',
}
type StringInfo = {
  start: number
  end?: number
  char: Quote
}

export function findJsxStrings(str: string): StringInfo[] {
  const chars = str.split('')
  const strings: StringInfo[] = []
  let bracketCount = 0
  for (let i = 0; i < chars.length; i++) {
    const char = chars[i]
    if (char === '{') {
      bracketCount += 1
    } else if (char === '}') {
      bracketCount -= 1
    } else if (
      char === Quote.SINGLE ||
      char === Quote.DOUBLE ||
      char === Quote.TICK
    ) {
      let open = arrFindLast(strings, (string) => string.char === char)
      if (strings.length === 0 || !open || (open && open.end)) {
        strings.push({ start: i + 1, char })
      } else {
        open.end = i
      }
    }
    if (i !== 0 && bracketCount === 0) {
      // end
      break
    }
  }
  return strings
}

export function findClassNamesInRange(
  doc: TextDocument,
  range: Range
): DocumentClassName[] {
  const classLists = findClassListsInRange(doc, range)
  return [].concat.apply(
    [],
    classLists.map(({ classList, range }) => {
      const parts = classList.split(/(\s+)/)
      const names: DocumentClassName[] = []
      let index = 0
      for (let i = 0; i < parts.length; i++) {
        if (i % 2 === 0) {
          const start = indexToPosition(classList, index)
          const end = indexToPosition(classList, index + parts[i].length)
          names.push({
            className: parts[i],
            range: {
              start: {
                line: range.start.line + start.line,
                character:
                  (end.line === 0 ? range.start.character : 0) +
                  start.character,
              },
              end: {
                line: range.start.line + end.line,
                character:
                  (end.line === 0 ? range.start.character : 0) + end.character,
              },
            },
          })
        }
        index += parts[i].length
      }
      return names
    })
  )
}

export function findClassListsInRange(
  doc: TextDocument,
  range: Range
): DocumentClassList[] {
  const text = doc.getText(range)
  const matches = findAll(/(@apply\s+)(?<classList>[^;}]+)[;}]/g, text)

  return matches.map((match) => {
    const start = indexToPosition(text, match.index + match[1].length)
    const end = indexToPosition(
      text,
      match.index + match[1].length + match.groups.classList.length
    )
    return {
      classList: match.groups.classList,
      range: {
        start: {
          line: range.start.line + start.line,
          character: range.start.character + start.character,
        },
        end: {
          line: range.start.line + end.line,
          character: range.start.character + end.character,
        },
      },
    }
  })
}

function indexToPosition(str: string, index: number): Position {
  const { line, col } = lineColumn(str + '\n', index)
  return { line: line - 1, character: col - 1 }
}