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

import { joinWithAnd } from '../util/joinWithAnd'
import { State, Settings } from '../util/state'
import type { TextDocument, DiagnosticSeverity } from 'vscode-languageserver'
import { CssConflictDiagnostic, DiagnosticKind } from './types'
import { findClassListsInDocument, getClassNamesInClassList } from '../util/find'
import { getClassNameDecls } from '../util/getClassNameDecls'
import { getClassNameMeta } from '../util/getClassNameMeta'
import { equal } from '../util/array'
import * as jit from '../util/jit'

export async function getCssConflictDiagnostics(
  state: State,
  document: TextDocument,
  settings: Settings
): Promise<CssConflictDiagnostic[]> {
  let severity = settings.tailwindCSS.lint.cssConflict
  if (severity === 'ignore') return []

  let diagnostics: CssConflictDiagnostic[] = []
  const classLists = await findClassListsInDocument(state, document)

  classLists.forEach((classList) => {
    const classNames = Array.isArray(classList)
      ? classList.flatMap(getClassNamesInClassList)
      : getClassNamesInClassList(classList)

    classNames.forEach((className, index) => {
      if (state.jit) {
        let { rules } = jit.generateRules(state, [className.className])
        if (rules.length === 0) {
          return
        }

        let info: Array<{ context: string[]; properties: string[] }> = rules.map((rule) => {
          let properties: string[] = []
          rule.walkDecls(({ prop }) => {
            properties.push(prop)
          })
          let context = jit.getRuleContext(state, rule, className.className)
          return { context, properties }
        })

        let otherClassNames = classNames.filter((_className, i) => i !== index)

        let conflictingClassNames = otherClassNames.filter((otherClassName) => {
          let { rules: otherRules } = jit.generateRules(state, [otherClassName.className])
          if (otherRules.length !== rules.length) {
            return false
          }

          for (let i = 0; i < otherRules.length; i++) {
            let rule = otherRules[i]
            let properties: string[] = []
            rule.walkDecls(({ prop }) => {
              properties.push(prop)
            })
            if (!equal(info[i].properties, properties)) {
              return false
            }
            let context = jit.getRuleContext(state, rule, otherClassName.className)
            if (!equal(info[i].context, context)) {
              return false
            }
          }

          return true
        })

        if (conflictingClassNames.length === 0) return

        diagnostics.push({
          code: DiagnosticKind.CssConflict,
          className,
          otherClassNames: conflictingClassNames,
          range: className.range,
          severity:
            severity === 'error'
              ? 1 /* DiagnosticSeverity.Error */
              : 2 /* DiagnosticSeverity.Warning */,
          message: `'${className.className}' applies the same CSS properties as ${joinWithAnd(
            conflictingClassNames.map(
              (conflictingClassName) => `'${conflictingClassName.className}'`
            )
          )}.`,
          relatedInformation: conflictingClassNames.map((conflictingClassName) => {
            return {
              message: conflictingClassName.className,
              location: {
                uri: document.uri,
                range: conflictingClassName.range,
              },
            }
          }),
        })

        return
      }

      let decls = getClassNameDecls(state, className.className)
      if (!decls) return

      let properties = Object.keys(decls)
      let meta = getClassNameMeta(state, className.className)

      let otherClassNames = classNames.filter((_className, i) => i !== index)

      let conflictingClassNames = otherClassNames.filter((otherClassName) => {
        let otherDecls = getClassNameDecls(state, otherClassName.className)
        if (!otherDecls) return false

        let otherMeta = getClassNameMeta(state, otherClassName.className)

        return (
          equal(properties, Object.keys(otherDecls)) &&
          !Array.isArray(meta) &&
          !Array.isArray(otherMeta) &&
          equal(meta.context, otherMeta.context) &&
          equal(meta.pseudo, otherMeta.pseudo) &&
          meta.scope === otherMeta.scope
        )
      })

      if (conflictingClassNames.length === 0) return

      diagnostics.push({
        code: DiagnosticKind.CssConflict,
        className,
        otherClassNames: conflictingClassNames,
        range: className.range,
        severity:
          severity === 'error'
            ? 1 /* DiagnosticSeverity.Error */
            : 2 /* DiagnosticSeverity.Warning */,
        message: `'${className.className}' applies the same CSS ${
          properties.length === 1 ? 'property' : 'properties'
        } as ${joinWithAnd(
          conflictingClassNames.map((conflictingClassName) => `'${conflictingClassName.className}'`)
        )}.`,
        relatedInformation: conflictingClassNames.map((conflictingClassName) => {
          return {
            message: conflictingClassName.className,
            location: {
              uri: document.uri,
              range: conflictingClassName.range,
            },
          }
        }),
      })
    })
  })

  return diagnostics
}