e6868e9112
- Rewrite restoreOldWrappedLines to use oh-my-pi's span-scanning algorithm - Add stripTrailingContinuationTokens and stripMergeOperatorChars helpers - Fix detectLineEnding to use first-occurrence logic instead of any-match - Fix applyAppend/applyPrepend to replace empty-line placeholder in empty files - Enhance tool description with 7 critical rules, tag guidance, and anti-patterns
45 lines
1.3 KiB
TypeScript
45 lines
1.3 KiB
TypeScript
export interface FileTextEnvelope {
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content: string
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hadBom: boolean
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lineEnding: "\n" | "\r\n"
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}
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function detectLineEnding(content: string): "\n" | "\r\n" {
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const crlfIndex = content.indexOf("\r\n")
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const lfIndex = content.indexOf("\n")
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if (lfIndex === -1) return "\n"
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if (crlfIndex === -1) return "\n"
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return crlfIndex < lfIndex ? "\r\n" : "\n"
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}
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function stripBom(content: string): { content: string; hadBom: boolean } {
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if (!content.startsWith("\uFEFF")) {
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return { content, hadBom: false }
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}
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return { content: content.slice(1), hadBom: true }
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}
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function normalizeToLf(content: string): string {
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return content.replace(/\r\n/g, "\n").replace(/\r/g, "\n")
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}
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function restoreLineEndings(content: string, lineEnding: "\n" | "\r\n"): string {
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if (lineEnding === "\n") return content
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return content.replace(/\n/g, "\r\n")
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}
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export function canonicalizeFileText(content: string): FileTextEnvelope {
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const stripped = stripBom(content)
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return {
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content: normalizeToLf(stripped.content),
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hadBom: stripped.hadBom,
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lineEnding: detectLineEnding(stripped.content),
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}
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}
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export function restoreFileText(content: string, envelope: FileTextEnvelope): string {
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const withLineEnding = restoreLineEndings(content, envelope.lineEnding)
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if (!envelope.hadBom) return withLineEnding
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return `\uFEFF${withLineEnding}`
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}
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