Method upLogicalLine

src/utils/Cursor.ts:511–531

()

  }

  upLogicalLine(): Cursor {
    const { start: currentStart } = this.getLogicalLineBounds()

    // At first line - stay at beginning
    if (currentStart === 0) {
      return new Cursor(this.measuredText, 0, 0)
    }

    // Calculate target column position
    const currentColumn = this.offset - currentStart

    // Find previous line bounds
    const prevLineEnd = currentStart - 1
    const prevLineStart = this.findLogicalLineStart(prevLineEnd)

    return this.createCursorWithColumn(
      prevLineStart,
      prevLineEnd,
      currentColumn,
    )
  }

  downLogicalLine(): Cursor {
    const { start: currentStart, end: currentEnd } = this.getLogicalLineBounds()