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