snark13/Xteink-X4-crosspoint-reader
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fix: goes to relative position when reader settings are changed

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GenesiaW 2026-01-22 19:25:04 +08:00
parent 3ce11f14ce
commit 6947804870
2 changed files with 24 additions and 4 deletions
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26
src/activities/reader/EpubReaderActivity.cpp
View File

@ -56,12 +56,17 @@ void EpubReaderActivity::onEnter() {
FsFile f;
if (SdMan.openFileForRead("ERS", epub->getCachePath() + "/progress.bin", f)) {
uint8_t data[4];
if (f.read(data, 4) == 4) {
uint8_t data[6];
int dataSize = f.read(data, 6);
if (dataSize == 4 || dataSize == 6) {
currentSpineIndex = data[0] + (data[1] << 8);
nextPageNumber = data[2] + (data[3] << 8);
cachedSpineIndex = currentSpineIndex;
Serial.printf("[%lu] [ERS] Loaded cache: %d, %d\n", millis(), currentSpineIndex, nextPageNumber);
}
if (dataSize == 6) {
cachedChapterTotalPageCount = data[4] + (data[5] << 8);
}
f.close();
}
// We may want a better condition to detect if we are opening for the first time.
@ -341,6 +346,17 @@ void EpubReaderActivity::renderScreen() {
} else {
section->currentPage = nextPageNumber;
}
// handles changes in reader settings and reset to approximate position based on cached progress
if (cachedChapterTotalPageCount > 0) {
// only goes to relative position if spine index matches cached value
if (currentSpineIndex == cachedSpineIndex && section->pageCount != cachedChapterTotalPageCount) {
float progress = static_cast<float>(section->currentPage) / static_cast<float>(cachedChapterTotalPageCount);
int newPage = static_cast<int>(progress * section->pageCount);
section->currentPage = newPage;
}
cachedChapterTotalPageCount = 0; // resets to 0 to prevent reading cached progress again
}
}
renderer.clearScreen();
@ -376,12 +392,14 @@ void EpubReaderActivity::renderScreen() {
FsFile f;
if (SdMan.openFileForWrite("ERS", epub->getCachePath() + "/progress.bin", f)) {
uint8_t data[4];
uint8_t data[6];
data[0] = currentSpineIndex & 0xFF;
data[1] = (currentSpineIndex >> 8) & 0xFF;
data[2] = section->currentPage & 0xFF;
data[3] = (section->currentPage >> 8) & 0xFF;
f.write(data, 4);
data[4] = section->pageCount & 0xFF;
data[5] = (section->pageCount >> 8) & 0xFF;
f.write(data, 6);
f.close();
}
}

2
src/activities/reader/EpubReaderActivity.h
View File

@ -15,6 +15,8 @@ class EpubReaderActivity final : public ActivityWithSubactivity {
int currentSpineIndex = 0;
int nextPageNumber = 0;
int pagesUntilFullRefresh = 0;
int cachedSpineIndex = 0;
int cachedChapterTotalPageCount = 0;
bool updateRequired = false;
const std::function<void()> onGoBack;
const std::function<void()> onGoHome;