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The performance has been improved by eliminating one parses step. And change excludes yaml-unist-parser from the dependencies.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,169 @@ | ||
| import type { | ||
| Comment, | ||
| Locations, | ||
| Position, | ||
| Range, | ||
| Token, | ||
| YAMLProgram, | ||
| } from "./ast" | ||
| import type { ASTNode } from "./yaml" | ||
| import lodash from "lodash" | ||
| import { traverseNodes } from "./traverse" | ||
|
|
||
| type CSTRangeData = { | ||
| start: number | ||
| end: number | ||
| } | ||
| export class Context { | ||
| public readonly code: string | ||
|
|
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| public readonly tokens: Token[] = [] | ||
|
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| public readonly comments: Comment[] = [] | ||
|
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| public hasCR = false | ||
|
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| private readonly locs: LinesAndColumns | ||
|
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| private readonly locsMap = new Map<number, Position>() | ||
|
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| private readonly crs: number[] | ||
|
|
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| public constructor(origCode: string) { | ||
| const len = origCode.length | ||
| const lineStartIndices = [0] | ||
| const crs: number[] = [] | ||
| let code = "" | ||
| for (let index = 0; index < len; ) { | ||
| const c = origCode[index++] | ||
| if (c === "\r") { | ||
| const next = origCode[index++] || "" | ||
| if (next === "\n") { | ||
| code += next | ||
| crs.push(index - 2) | ||
| } else { | ||
| code += `\n${next}` | ||
| } | ||
| lineStartIndices.push(code.length) | ||
| } else { | ||
| code += c | ||
| if (c === "\n") { | ||
| lineStartIndices.push(code.length) | ||
| } | ||
| } | ||
| } | ||
| this.code = code | ||
| this.locs = new LinesAndColumns(lineStartIndices) | ||
| this.hasCR = Boolean(crs.length) | ||
| this.crs = crs | ||
| } | ||
|
|
||
| public remapCR(ast: YAMLProgram): void { | ||
| const cache: Record<number, number> = {} | ||
| const remapIndex = (index: number): number => { | ||
| let result = cache[index] | ||
| if (result != null) { | ||
| return result | ||
| } | ||
| result = index | ||
| for (const cr of this.crs) { | ||
| if (cr < result) { | ||
| result++ | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
| return (cache[index] = result) | ||
| } | ||
| // eslint-disable-next-line func-style -- ignore | ||
| const remapRange = (range: [number, number]): [number, number] => { | ||
| return [remapIndex(range[0]), remapIndex(range[1])] | ||
| } | ||
|
|
||
| traverseNodes(ast, { | ||
| enterNode(node) { | ||
| node.range = remapRange(node.range) | ||
| }, | ||
| leaveNode() { | ||
| // ignore | ||
| }, | ||
| }) | ||
| for (const token of ast.tokens) { | ||
| token.range = remapRange(token.range) | ||
| } | ||
| for (const comment of ast.comments) { | ||
| comment.range = remapRange(comment.range) | ||
| } | ||
| } | ||
|
|
||
| public getLocFromIndex(index: number): { line: number; column: number } { | ||
| let loc = this.locsMap.get(index) | ||
| if (!loc) { | ||
| loc = this.locs.getLocFromIndex(index) | ||
| this.locsMap.set(index, loc) | ||
| } | ||
| return { | ||
| line: loc.line, | ||
| column: loc.column, | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Get the location information of the given node. | ||
| * @param node The node. | ||
| */ | ||
| public getConvertLocation(node: { range: Range } | ASTNode): Locations { | ||
| const [start, end] = node.range! | ||
|
|
||
| return { | ||
| range: [start, end], | ||
| loc: { | ||
| start: this.getLocFromIndex(start), | ||
| end: this.getLocFromIndex(end), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Get the location information of the given CSTRange. | ||
| * @param node The node. | ||
| */ | ||
| public getConvertLocationFromCSTRange( | ||
| range: CSTRangeData | undefined | null, | ||
| ): Locations { | ||
| return this.getConvertLocation({ range: [range!.start, range!.end] }) | ||
| } | ||
|
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| public addComment(comment: Comment): void { | ||
| this.comments.push(comment) | ||
| } | ||
|
|
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| /** | ||
| * Add token to tokens | ||
| */ | ||
| public addToken(type: Token["type"], range: Range): Token { | ||
| const token = { | ||
| type, | ||
| value: this.code.slice(...range), | ||
| ...this.getConvertLocation({ range }), | ||
| } | ||
| this.tokens.push(token) | ||
| return token | ||
| } | ||
| } | ||
|
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| class LinesAndColumns { | ||
| private readonly lineStartIndices: number[] | ||
|
|
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| public constructor(lineStartIndices: number[]) { | ||
| this.lineStartIndices = lineStartIndices | ||
| } | ||
|
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| public getLocFromIndex(index: number) { | ||
| const lineNumber = lodash.sortedLastIndex(this.lineStartIndices, index) | ||
| return { | ||
| line: lineNumber, | ||
| column: index - this.lineStartIndices[lineNumber - 1], | ||
| } | ||
| } | ||
| } |
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