@Override
public void pageUp() {
this.storedPosition = -1;
if (isAtStart()) {
PageTurnerSpine spine = bookView.getSpine();
if (spine == null || !spine.navigateBack()) {
return;
}
this.clearText();
this.storedPosition = Integer.MAX_VALUE;
this.bookView.loadText();
} else {
this.pageNum = Math.max(pageNum - 1, 0);
updatePosition();
}
}
@Override
public void pageDown() {
this.storedPosition = -1;
if (isAtEnd()) {
PageTurnerSpine spine = bookView.getSpine();
if (spine == null || !spine.navigateForward()) {
return;
}
this.clearText();
this.pageNum = 0;
bookView.loadText();
} else {
this.pageNum = Math.min(pageNum + 1, this.pageOffsets.size() - 1);
updatePosition();
}
}