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import moo from 'moo'
import { lazy } from './lazy'
const classAttributeStates: () => { [x: string]: moo.Rules } = () => ({
doubleClassList: {
lbrace: { match: new RegExp('(?<!\\\\)\\{'), push: 'interpBrace' },
rbrace: { match: new RegExp('(?<!\\\\)\\}'), pop: 1 },
end: { match: new RegExp('(?<!\\\\)"'), pop: 1 },
classlist: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
singleClassList: {
lbrace: { match: new RegExp('(?<!\\\\)\\{'), push: 'interpBrace' },
rbrace: { match: new RegExp('(?<!\\\\)\\}'), pop: 1 },
end: { match: new RegExp("(?<!\\\\)'"), pop: 1 },
classlist: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
tickClassList: {
lbrace: { match: new RegExp('(?<=(?<!\\\\)\\$)\\{'), push: 'interpBrace' },
rbrace: { match: new RegExp('(?<!\\\\)\\}'), pop: 1 },
end: { match: new RegExp('(?<!\\\\)`'), pop: 1 },
classlist: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
interpBrace: {
startSingle: { match: new RegExp("(?<!\\\\)'"), push: 'singleClassList' },
startDouble: { match: new RegExp('(?<!\\\\)"'), push: 'doubleClassList' },
startTick: { match: new RegExp('(?<!\\\\)`'), push: 'tickClassList' },
lbrace: { match: new RegExp('(?<!\\\\)\\{'), push: 'interpBrace' },
rbrace: { match: new RegExp('(?<!\\\\)\\}'), pop: 1 },
text: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
interpSingle: {
startDouble: { match: new RegExp('(?<!\\\\)"'), push: 'doubleClassList' },
startTick: { match: new RegExp('(?<!\\\\)`'), push: 'tickClassList' },
single: { match: new RegExp("(?<!\\\\)'"), pop: 1 },
text: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
interpDouble: {
startSingle: { match: new RegExp("(?<!\\\\)'"), push: 'singleClassList' },
startTick: { match: new RegExp('(?<!\\\\)`'), push: 'tickClassList' },
double: { match: new RegExp('(?<!\\\\)"'), pop: 1 },
text: { match: new RegExp('[\\s\\S]'), lineBreaks: true },
},
})
const simpleClassAttributeStates: { [x: string]: moo.Rules } = {
main: {
start: { match: '"', push: 'doubleClassList' },
},
doubleClassList: {
end: { match: '"', pop: 1 },
classlist: { match: /[\s\S]/, lineBreaks: true },
},
}
export const getClassAttributeLexer = lazy(() => {
let supportsNegativeLookbehind = true
try {
new RegExp('(?<!)')
} catch (_) {
supportsNegativeLookbehind = false
}
if (supportsNegativeLookbehind) {
return moo.states({
main: {
start1: { match: '"', push: 'doubleClassList' },
start2: { match: "'", push: 'singleClassList' },
start3: { match: '{', push: 'interpBrace' },
},
...classAttributeStates(),
})
}
return moo.states(simpleClassAttributeStates)
})
export const getComputedClassAttributeLexer = lazy(() => {
let supportsNegativeLookbehind = true
try {
new RegExp('(?<!)')
} catch (_) {
supportsNegativeLookbehind = false
}
if (supportsNegativeLookbehind) {
return moo.states({
main: {
lbrace: { match: '{', push: 'interpBrace' },
single: { match: "'", push: 'interpSingle' },
double: { match: '"', push: 'interpDouble' },
},
...classAttributeStates(),
})
}
return moo.states(simpleClassAttributeStates)
})
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