/**
* Updates the has-draft status of a particular thread on a piecemeal basis, to be called when a
* draft has appeared or disappeared.
*/
public synchronized void setDraftState(long threadId, boolean hasDraft) {
if (threadId <= 0) {
return;
}
boolean changed;
if (hasDraft) {
changed = mDraftSet.add(threadId);
} else {
changed = mDraftSet.remove(threadId);
}
if (Log.isLoggable(LogTag.APP, Log.DEBUG)) {
log("setDraftState: tid=" + threadId + ", value=" + hasDraft + ", changed=" + changed);
}
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
dump();
}
// Notify listeners if there was a change.
if (changed) {
for (OnDraftChangedListener l : mChangeListeners) {
l.onDraftChanged(threadId, hasDraft);
}
}
}
/** Does the actual work of rebuilding the draft cache. */
private synchronized void rebuildCache() {
if (Log.isLoggable(LogTag.APP, Log.DEBUG)) {
log("rebuildCache");
}
HashSet<Long> oldDraftSet = mDraftSet;
HashSet<Long> newDraftSet = new HashSet<Long>(oldDraftSet.size());
Cursor cursor =
SqliteWrapper.query(
mContext,
mContext.getContentResolver(),
MmsSms.CONTENT_DRAFT_URI,
DRAFT_PROJECTION,
null,
null,
null);
if (cursor != null) {
try {
if (cursor.moveToFirst()) {
for (; !cursor.isAfterLast(); cursor.moveToNext()) {
long threadId = cursor.getLong(COLUMN_DRAFT_THREAD_ID);
newDraftSet.add(threadId);
if (Log.isLoggable(LogTag.APP, Log.DEBUG)) {
log("rebuildCache: add tid=" + threadId);
}
}
}
} finally {
cursor.close();
}
}
mDraftSet = newDraftSet;
if (Log.isLoggable(LogTag.APP, Log.VERBOSE)) {
dump();
}
// If nobody's interested in finding out about changes,
// just bail out early.
if (mChangeListeners.size() < 1) {
return;
}
// Find out which drafts were removed and added and notify
// listeners.
Set<Long> added = new HashSet<Long>(newDraftSet);
added.removeAll(oldDraftSet);
Set<Long> removed = new HashSet<Long>(oldDraftSet);
removed.removeAll(newDraftSet);
for (OnDraftChangedListener l : mChangeListeners) {
for (long threadId : added) {
l.onDraftChanged(threadId, true);
}
for (long threadId : removed) {
l.onDraftChanged(threadId, false);
}
}
}
