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dont round % and default to start of chapter not end

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This commit is contained in:
Justin Mitchell
2026-01-13 03:53:45 -05:00
parent 0620a46429
commit f36d89cd18
5 changed files with 32 additions and 34 deletions
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41
lib/KOReaderSync/ProgressMapper.cpp
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@@ -14,9 +14,8 @@ KOReaderPosition ProgressMapper::toKOReader(const std::shared_ptr<Epub>& epub, c
intraSpineProgress = static_cast<float>(pos.pageNumber) / static_cast<float>(pos.totalPages);
}
// Calculate overall book progress (0-100 from Epub, convert to 0.0-1.0)
const uint8_t progressPercent = epub->calculateProgress(pos.spineIndex, intraSpineProgress);
result.percentage = static_cast<float>(progressPercent) / 100.0f;
// Calculate overall book progress (0.0-1.0)
result.percentage = epub->calculateProgress(pos.spineIndex, intraSpineProgress);
// Generate XPath with estimated paragraph position based on page
result.xpath = generateXPath(pos.spineIndex, pos.pageNumber, pos.totalPages);
@@ -48,9 +47,11 @@ CrossPointPosition ProgressMapper::toCrossPoint(const std::shared_ptr<Epub>& epu
int xpathSpineIndex = parseDocFragmentIndex(koPos.xpath);
if (xpathSpineIndex >= 0 && xpathSpineIndex < epub->getSpineItemsCount()) {
result.spineIndex = xpathSpineIndex;
Serial.printf("[%lu] [ProgressMapper] Got spine index from XPath: %d\n", millis(), result.spineIndex);
// When we have XPath, go to page 0 of the spine - byte-based page calculation is unreliable
result.pageNumber = 0;
Serial.printf("[%lu] [ProgressMapper] Got spine index from XPath: %d (page=0)\n", millis(), result.spineIndex);
} else {
// Fall back to percentage-based lookup
// Fall back to percentage-based lookup for both spine and page
const size_t targetBytes = static_cast<size_t>(bookSize * koPos.percentage);
// Find the spine item that contains this byte position
@@ -63,26 +64,20 @@ CrossPointPosition ProgressMapper::toCrossPoint(const std::shared_ptr<Epub>& epu
}
Serial.printf("[%lu] [ProgressMapper] Got spine index from percentage (%.2f%%): %d\n", millis(),
koPos.percentage * 100, result.spineIndex);
}
// Estimate page number within the spine item using percentage
if (totalPagesInSpine > 0 && result.spineIndex < epub->getSpineItemsCount()) {
// Calculate what percentage through the spine item we should be
const size_t prevCumSize = (result.spineIndex > 0) ? epub->getCumulativeSpineItemSize(result.spineIndex - 1) : 0;
const size_t currentCumSize = epub->getCumulativeSpineItemSize(result.spineIndex);
const size_t spineSize = currentCumSize - prevCumSize;
// Estimate page number within the spine item using percentage (only when no XPath)
if (totalPagesInSpine > 0 && result.spineIndex < epub->getSpineItemsCount()) {
const size_t prevCumSize = (result.spineIndex > 0) ? epub->getCumulativeSpineItemSize(result.spineIndex - 1) : 0;
const size_t currentCumSize = epub->getCumulativeSpineItemSize(result.spineIndex);
const size_t spineSize = currentCumSize - prevCumSize;
if (spineSize > 0) {
const size_t targetBytes = static_cast<size_t>(bookSize * koPos.percentage);
const size_t bytesIntoSpine = (targetBytes > prevCumSize) ? (targetBytes - prevCumSize) : 0;
const float intraSpineProgress = static_cast<float>(bytesIntoSpine) / static_cast<float>(spineSize);
// Clamp to valid range
const float clampedProgress = std::max(0.0f, std::min(1.0f, intraSpineProgress));
result.pageNumber = static_cast<int>(clampedProgress * totalPagesInSpine);
// Ensure page number is valid
result.pageNumber = std::max(0, std::min(result.pageNumber, totalPagesInSpine - 1));
if (spineSize > 0) {
const size_t bytesIntoSpine = (targetBytes > prevCumSize) ? (targetBytes - prevCumSize) : 0;
const float intraSpineProgress = static_cast<float>(bytesIntoSpine) / static_cast<float>(spineSize);
const float clampedProgress = std::max(0.0f, std::min(1.0f, intraSpineProgress));
result.pageNumber = static_cast<int>(clampedProgress * totalPagesInSpine);
result.pageNumber = std::max(0, std::min(result.pageNumber, totalPagesInSpine - 1));
}
}
}