67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#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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* CrossPoint first tries to extract an element-level XPath by reparsing the
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* current spine XHTML and mapping intra-spine progress to text anchors.
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* If extraction fails, it falls back to a synthetic chapter-level XPath.
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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 currentSpineIndex Index of the currently open spine item (for density estimation)
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* @param totalPagesInCurrentSpine Total pages in the current spine item (for density 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 currentSpineIndex = -1, int totalPagesInCurrentSpine = 0);
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private:
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/**
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* Generate XPath for KOReader compatibility.
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* Fallback format: /body/DocFragment[spineIndex]/body
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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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