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Feature: go to text/start reference in epub guide section at first start (#156)

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This parses the guide section in the content.opf for text/start
references and jumps to this on first open of the book.

Currently, this behavior will be repeated in case the reader manually
jumps to Chapter 0 and then re-opens the book. IMO, this is an
acceptable edge case (for which I couldn't see a good fix other than to
drag a "first open" boolean around).

---------

Co-authored-by: Sam Davis <sam@sjd.co>
Co-authored-by: Dave Allie <dave@daveallie.com>
This commit is contained in:
Jonas Diemer
2025-12-30 13:02:46 +01:00
committed by GitHub
parent be1b5bad21
commit 03f0ce04cc
7 changed files with 90 additions and 3 deletions
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8
lib/Epub/Epub/BookMetadataCache.cpp
View File

@@ -9,7 +9,7 @@
#include "FsHelpers.h"
namespace {
constexpr uint8_t BOOK_CACHE_VERSION = 2;
constexpr uint8_t BOOK_CACHE_VERSION = 3;
constexpr char bookBinFile[] = "/book.bin";
constexpr char tmpSpineBinFile[] = "/spine.bin.tmp";
constexpr char tmpTocBinFile[] = "/toc.bin.tmp";
@@ -87,8 +87,8 @@ bool BookMetadataCache::buildBookBin(const std::string& epubPath, const BookMeta
constexpr uint32_t headerASize =
sizeof(BOOK_CACHE_VERSION) + /* LUT Offset */ sizeof(uint32_t) + sizeof(spineCount) + sizeof(tocCount);
const uint32_t metadataSize =
metadata.title.size() + metadata.author.size() + metadata.coverItemHref.size() + sizeof(uint32_t) * 3;
const uint32_t metadataSize = metadata.title.size() + metadata.author.size() + metadata.coverItemHref.size() +
metadata.textReferenceHref.size() + sizeof(uint32_t) * 4;
const uint32_t lutSize = sizeof(uint32_t) * spineCount + sizeof(uint32_t) * tocCount;
const uint32_t lutOffset = headerASize + metadataSize;
@@ -101,6 +101,7 @@ bool BookMetadataCache::buildBookBin(const std::string& epubPath, const BookMeta
serialization::writeString(bookFile, metadata.title);
serialization::writeString(bookFile, metadata.author);
serialization::writeString(bookFile, metadata.coverItemHref);
serialization::writeString(bookFile, metadata.textReferenceHref);
// Loop through spine entries, writing LUT positions
spineFile.seek(0);
@@ -289,6 +290,7 @@ bool BookMetadataCache::load() {
serialization::readString(bookFile, coreMetadata.title);
serialization::readString(bookFile, coreMetadata.author);
serialization::readString(bookFile, coreMetadata.coverItemHref);
serialization::readString(bookFile, coreMetadata.textReferenceHref);
loaded = true;
Serial.printf("[%lu] [BMC] Loaded cache data: %d spine, %d TOC entries\n", millis(), spineCount, tocCount);