73 lines
2.1 KiB
C
73 lines
2.1 KiB
C
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#pragma once
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#include <Epub.h>
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#include <memory>
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#include <string>
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/**
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* CrossPoint position representation.
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*/
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struct CrossPointPosition {
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int spineIndex; // Current spine item (chapter) index
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int pageNumber; // Current page within the spine item
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int totalPages; // Total pages in the current spine item
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};
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/**
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* KOReader position representation.
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*/
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struct KOReaderPosition {
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std::string xpath; // XPath-like progress string
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float percentage; // Progress percentage (0.0 to 1.0)
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};
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/**
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* Maps between CrossPoint and KOReader position formats.
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*
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* CrossPoint tracks position as (spineIndex, pageNumber).
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* KOReader uses XPath-like strings + percentage.
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*
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* Since CrossPoint discards HTML structure during parsing, we generate
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* synthetic XPath strings based on spine index, using percentage as the
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* primary sync mechanism.
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*/
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class ProgressMapper {
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public:
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/**
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* Convert CrossPoint position to KOReader format.
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*
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* @param epub The EPUB book
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* @param pos CrossPoint position
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* @return KOReader position
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*/
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static KOReaderPosition toKOReader(const std::shared_ptr<Epub>& epub, const CrossPointPosition& pos);
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/**
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* Convert KOReader position to CrossPoint format.
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*
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* Note: The returned pageNumber may be approximate since different
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* rendering settings produce different page counts.
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*
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* @param epub The EPUB book
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* @param koPos KOReader position
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* @param totalPagesInSpine Total pages in the target spine item (for page estimation)
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* @return CrossPoint position
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*/
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static CrossPointPosition toCrossPoint(const std::shared_ptr<Epub>& epub, const KOReaderPosition& koPos,
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int totalPagesInSpine = 0);
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private:
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/**
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* Generate XPath for KOReader compatibility.
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* Format: /body/DocFragment[spineIndex+1]/body/p[estimatedParagraph]
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* Paragraph is estimated based on page position within the chapter.
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*/
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static std::string generateXPath(int spineIndex, int pageNumber, int totalPages);
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/**
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* Parse DocFragment index from XPath string.
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* Returns -1 if not found.
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*/
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static int parseDocFragmentIndex(const std::string& xpath);
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};
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