Method findCharacter

src/utils/Cursor.ts:1062–1105

* Find a character using vim f/F/t/T semantics. * * @param char - The character to find * @param type - 'f' (forward to), 'F' (backward to), 't' (forward till), 'T' (backward till) * @param count - Find the Nth occurrence * @returns The target offset, or null if not found

(
    char: string,
    type: 'f' | 'F' | 't' | 'T',
    count: number = 1,
  )

   * @returns The target offset, or null if not found
   */
  findCharacter(
    char: string,
    type: 'f' | 'F' | 't' | 'T',
    count: number = 1,
  ): number | null {
    const text = this.text
    const forward = type === 'f' || type === 't'
    const till = type === 't' || type === 'T'
    let found = 0

    if (forward) {
      let pos = this.measuredText.nextOffset(this.offset)
      while (pos < text.length) {
        const grapheme = this.graphemeAt(pos)
        if (grapheme === char) {
          found++
          if (found === count) {
            return till
              ? Math.max(this.offset, this.measuredText.prevOffset(pos))
              : pos
          }
        }
        pos = this.measuredText.nextOffset(pos)
      }
    } else {
      if (this.offset === 0) return null
      let pos = this.measuredText.prevOffset(this.offset)
      while (pos >= 0) {
        const grapheme = this.graphemeAt(pos)
        if (grapheme === char) {
          found++
          if (found === count) {
            return till
              ? Math.min(this.offset, this.measuredText.nextOffset(pos))
              : pos
          }
        }
        if (pos === 0) break
        pos = this.measuredText.prevOffset(pos)
      }
    }

    return null
  }
}

class WrappedLine {