ReadViewSDK/Sources/RDReaderView/EPUBTextRendering/Pagination/RDEPUBTextPaginationSupport.swift

import CoreText
import UIKit

extension NSAttributedString {

    func rd_paginatedFrames(
        size: CGSize,
        fragmentOffsets: [String: Int] = [:],
        config: RDEPUBTextLayoutConfig = .default
    ) -> [RDEPUBTextLayoutFrame] {
        let factory = RDEPUBCoreTextPageFrameFactory(attributedString: self, pageSize: size, config: config)
        let counter = RDEPUBChapterPageCounter(factory: factory)
        return counter.layoutFrames(fragmentOffsets: fragmentOffsets)
    }

    func ss_pageRanges(size: CGSize) -> [NSRange] {
        rd_paginatedFrames(size: size).map(\.contentRange)
    }
}