Method render

src/native-ts/color-diff/index.ts:860–932

(themeName: string, width: number, dim: boolean)

  }

  render(themeName: string, width: number, dim: boolean): string[] | null {
    const mode = detectColorMode(themeName)
    const theme = buildTheme(themeName, mode)
    const lang = detectLanguage(this.filePath, this.firstLine)
    const hlState = { lang, stack: null }

    // Warm highlighter with prefix lines (highlight.js is stateless per call,
    // so this is a no-op for now — preserved for API parity)
    void this.prefixContent

    const maxDigits = String(maxLineNumber(this.hunk)).length
    let oldLine = this.hunk.oldStart
    let newLine = this.hunk.newStart
    const effectiveWidth = Math.max(1, width - maxDigits - 2 - 1)

    // First pass: assign markers + line numbers
    type Entry = { lineNumber: number; marker: Marker; code: string }
    const entries: Entry[] = this.hunk.lines.map(rawLine => {
      const marker = parseMarker(rawLine.slice(0, 1))
      const code = rawLine.slice(1)
      let lineNumber: number
      switch (marker) {
        case '+':
          lineNumber = newLine++
          break
        case '-':
          lineNumber = oldLine++
          break
        case ' ':
          lineNumber = newLine
          oldLine++
          newLine++
          break
      }
      return { lineNumber, marker, code }
    })

    // Word-diff ranges (skip when dim — too loud)
    const ranges: Range[][] = entries.map(() => [])
    if (!dim) {
      const markers = entries.map(e => e.marker)
      for (const [delIdx, addIdx] of findAdjacentPairs(markers)) {
        const [delR, addR] = wordDiffStrings(
          entries[delIdx]!.code,
          entries[addIdx]!.code,
        )
        ranges[delIdx] = delR
        ranges[addIdx] = addR
      }
    }

    // Second pass: highlight + transform pipeline
    const out: string[] = []
    for (let i = 0; i < entries.length; i++) {
      const { lineNumber, marker, code } = entries[i]!
      const tokens: Block[] =
        marker === '-'
          ? [[defaultStyle(theme), code]]