private CharSequence applySpans(CharSequence text, int offset) {
List<HighLight> highLights = highlightManager.getHighLights(bookView.getFileName());
int end = offset + text.length() - 1;
for (final HighLight highLight : highLights) {
if (highLight.getIndex() == bookView.getIndex()
&& highLight.getStart() >= offset
&& highLight.getStart() < end) {
LOG.debug(
"Got highlight from "
+ highLight.getStart()
+ " to "
+ highLight.getEnd()
+ " with offset "
+ offset);
int highLightEnd = Math.min(end, highLight.getEnd());
((Spannable) text)
.setSpan(
new HighlightSpan(highLight),
highLight.getStart() - offset,
highLightEnd - offset,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
return text;
}
@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();
}
}
@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 setBookView(BookView bookView) {
this.bookView = bookView;
this.childView = bookView.getInnerView();
}
public List<Integer> getPageOffsets(CharSequence text, boolean includePageNumbers) {
if (text == null) {
return new ArrayList<Integer>();
}
List<Integer> pageOffsets = new ArrayList<Integer>();
TextPaint textPaint = bookView.getInnerView().getPaint();
int boundedWidth = bookView.getInnerView().getWidth();
LOG.debug("Page width: " + boundedWidth);
StaticLayout layout =
layoutFactory.create(text, textPaint, boundedWidth, bookView.getLineSpacing());
LOG.debug("Layout height: " + layout.getHeight());
layout.draw(new Canvas());
// Subtract the height of the top margin
int pageHeight = bookView.getHeight() - bookView.getVerticalMargin();
if (includePageNumbers) {
String bottomSpace = "0\n";
StaticLayout numLayout =
layoutFactory.create(bottomSpace, textPaint, boundedWidth, bookView.getLineSpacing());
numLayout.draw(new Canvas());
// Subtract the height needed to show page numbers, or the
// height of the margin, whichever is more
pageHeight = pageHeight - Math.max(numLayout.getHeight(), bookView.getVerticalMargin());
} else {
// Just subtract the bottom margin
pageHeight = pageHeight - bookView.getVerticalMargin();
}
LOG.debug("Got pageHeight " + pageHeight);
int totalLines = layout.getLineCount();
int topLineNextPage = -1;
int pageStartOffset = 0;
while (topLineNextPage < totalLines - 1) {
LOG.debug("Processing line " + topLineNextPage + " / " + totalLines);
int topLine = layout.getLineForOffset(pageStartOffset);
topLineNextPage = layout.getLineForVertical(layout.getLineTop(topLine) + pageHeight);
LOG.debug("topLine " + topLine + " / " + topLineNextPage);
if (topLineNextPage == topLine) { // If lines are bigger than can fit on a page
topLineNextPage = topLine + 1;
}
int pageEnd = layout.getLineEnd(topLineNextPage - 1);
LOG.debug("pageStartOffset=" + pageStartOffset + ", pageEnd=" + pageEnd);
if (pageEnd > pageStartOffset) {
if (text.subSequence(pageStartOffset, pageEnd).toString().trim().length() > 0) {
pageOffsets.add(pageStartOffset);
}
pageStartOffset = layout.getLineStart(topLineNextPage);
}
}
return pageOffsets;
}
