protected int addPersistentObject(PositionDependentRecord slideRecord) {
slideRecord.setLastOnDiskOffset(HSLFSlideShowImpl.UNSET_OFFSET);
_hslfSlideShow.appendRootLevelRecord((Record) slideRecord);
// For position dependent records, hold where they were and now are
// As we go along, update, and hand over, to any Position Dependent
// records we happen across
Map<RecordTypes.Type, PositionDependentRecord> interestingRecords =
new HashMap<RecordTypes.Type, PositionDependentRecord>();
try {
_hslfSlideShow.updateAndWriteDependantRecords(null, interestingRecords);
} catch (IOException e) {
throw new HSLFException(e);
}
PersistPtrHolder ptr =
(PersistPtrHolder) interestingRecords.get(RecordTypes.PersistPtrIncrementalBlock);
UserEditAtom usr = (UserEditAtom) interestingRecords.get(RecordTypes.UserEditAtom);
// persist ID is UserEditAtom.maxPersistWritten + 1
int psrId = usr.getMaxPersistWritten() + 1;
// Last view is now of the slide
usr.setLastViewType((short) UserEditAtom.LAST_VIEW_SLIDE_VIEW);
// increment the number of persistent objects
usr.setMaxPersistWritten(psrId);
// Add the new slide into the last PersistPtr
// (Also need to tell it where it is)
int slideOffset = slideRecord.getLastOnDiskOffset();
slideRecord.setLastOnDiskOffset(slideOffset);
ptr.addSlideLookup(psrId, slideOffset);
logger.log(POILogger.INFO, "New slide/object ended up at " + slideOffset);
return psrId;
}
/**
* Use the PersistPtrHolder entries to figure out what is the "most recent" version of all the
* core records (Document, Notes, Slide etc), and save a record of them. Do this by walking from
* the oldest PersistPtr to the newest, overwriting any references found along the way with newer
* ones
*/
private void findMostRecentCoreRecords() {
// To start with, find the most recent in the byte offset domain
Map<Integer, Integer> mostRecentByBytes = new HashMap<Integer, Integer>();
for (Record record : _hslfSlideShow.getRecords()) {
if (record instanceof PersistPtrHolder) {
PersistPtrHolder pph = (PersistPtrHolder) record;
// If we've already seen any of the "slide" IDs for this
// PersistPtr, remove their old positions
int[] ids = pph.getKnownSlideIDs();
for (int id : ids) {
if (mostRecentByBytes.containsKey(id)) {
mostRecentByBytes.remove(id);
}
}
// Now, update the byte level locations with their latest values
Map<Integer, Integer> thisSetOfLocations = pph.getSlideLocationsLookup();
for (int id : ids) {
mostRecentByBytes.put(id, thisSetOfLocations.get(id));
}
}
}
// We now know how many unique special records we have, so init
// the array
_mostRecentCoreRecords = new Record[mostRecentByBytes.size()];
// We'll also want to be able to turn the slide IDs into a position
// in this array
_sheetIdToCoreRecordsLookup = new HashMap<Integer, Integer>();
Integer[] allIDs = mostRecentByBytes.keySet().toArray(new Integer[mostRecentByBytes.size()]);
Arrays.sort(allIDs);
for (int i = 0; i < allIDs.length; i++) {
_sheetIdToCoreRecordsLookup.put(allIDs[i], i);
}
Map<Integer, Integer> mostRecentByBytesRev =
new HashMap<Integer, Integer>(mostRecentByBytes.size());
for (Map.Entry<Integer, Integer> me : mostRecentByBytes.entrySet()) {
mostRecentByBytesRev.put(me.getValue(), me.getKey());
}
// Now convert the byte offsets back into record offsets
for (Record record : _hslfSlideShow.getRecords()) {
if (!(record instanceof PositionDependentRecord)) continue;
PositionDependentRecord pdr = (PositionDependentRecord) record;
int recordAt = pdr.getLastOnDiskOffset();
Integer thisID = mostRecentByBytesRev.get(recordAt);
if (thisID == null) continue;
// Bingo. Now, where do we store it?
int storeAt = _sheetIdToCoreRecordsLookup.get(thisID);
// Tell it its Sheet ID, if it cares
if (pdr instanceof PositionDependentRecordContainer) {
PositionDependentRecordContainer pdrc = (PositionDependentRecordContainer) record;
pdrc.setSheetId(thisID);
}
// Finally, save the record
_mostRecentCoreRecords[storeAt] = record;
}
// Now look for the interesting records in there
for (Record record : _mostRecentCoreRecords) {
// Check there really is a record at this number
if (record != null) {
// Find the Document, and interesting things in it
if (record.getRecordType() == RecordTypes.Document.typeID) {
_documentRecord = (Document) record;
_fonts = _documentRecord.getEnvironment().getFontCollection();
}
} else {
// No record at this number
// Odd, but not normally a problem
}
}
}