/**
* List directories in subtree, limited by runtime and depth; remove empty branches (w/o books).
*
* @param root is directory to start with
* @param maxDepth is maximum depth
* @param limitTs is limit for android.os.SystemClock.uptimeMillis()
* @return true if completed, false if stopped by limit.
*/
public boolean listSubtrees(FileInfo root, int maxDepth, long limitTs) {
for (int depth = 1; depth <= maxDepth; depth++) {
boolean res = listSubtree(root, depth, limitTs);
if (res) return true;
long ts = android.os.SystemClock.uptimeMillis();
if (ts > limitTs) return false; // limited by time
// iterate deeper
}
return false; // limited by depth
}
/**
* List directories in subtree, limited by runtime and depth; remove empty branches (w/o books).
*
* @param root is directory to start with
* @param maxDepth is maximum depth
* @param limitTs is limit for android.os.SystemClock.uptimeMillis()
* @return true if completed, false if stopped by limit.
*/
private boolean listSubtree(FileInfo root, int maxDepth, long limitTs) {
long ts = android.os.SystemClock.uptimeMillis();
if (ts > limitTs || maxDepth <= 0) return false;
listDirectory(root);
for (int i = root.dirCount() - 1; i >= -0; i--) {
boolean res = listSubtree(root.getDir(i), maxDepth - 1, limitTs);
if (!res) return false;
}
if (mHideEmptyDirs) root.removeEmptyDirs();
return true;
}
/**
* Lists all directories from root to directory of specified file, returns found directory.
*
* @param file
* @param root
* @return
*/
public FileInfo findParent(FileInfo file, FileInfo root) {
FileInfo parent = findParentInternal(file, root);
if (parent == null) {
autoAddRootForFile(new File(file.pathname));
parent = findParentInternal(file, root);
if (parent == null) {
L.e("Cannot find root directory for file " + file.pathname);
return null;
}
}
long maxTs = android.os.SystemClock.uptimeMillis() + MAX_DIR_LIST_TIME;
listSubtrees(root, mHideEmptyDirs ? 5 : 1, maxTs);
return parent;
}
/**
* Scan single directory for dir and file properties in background thread.
*
* @param baseDir is directory to scan
* @param readyCallback is called on completion
* @param recursiveScan is true to scan subdirectories recursively, false to scan current
* directory only
* @param scanControl is to stop long scanning
*/
public void scanDirectory(
final CRDBService.LocalBinder db,
final FileInfo baseDir,
final Runnable readyCallback,
final boolean recursiveScan,
final ScanControl scanControl) {
// Call in GUI thread only!
BackgroundThread.ensureGUI();
log.d("scanDirectory(" + baseDir.getPathName() + ") " + (recursiveScan ? "recursive" : ""));
listDirectory(baseDir);
listSubtree(baseDir, 2, android.os.SystemClock.uptimeMillis() + 700);
if ((!getDirScanEnabled() || baseDir.isScanned) && !recursiveScan) {
readyCallback.run();
return;
}
Engine.ProgressControl progress =
engine.createProgress(recursiveScan ? 0 : R.string.progress_scanning);
scanDirectoryFiles(
db,
baseDir,
scanControl,
progress,
new Runnable() {
@Override
public void run() {
// GUI thread
onDirectoryContentChanged(baseDir);
try {
if (scanControl.isStopped()) {
// scan is stopped
readyCallback.run();
return;
} else {
baseDir.isScanned = true;
if (recursiveScan) {
if (scanControl.isStopped()) {
// scan is stopped
readyCallback.run();
return;
}
// make list of subdirectories to scan
final ArrayList<FileInfo> dirsToScan = new ArrayList<FileInfo>();
for (int i = baseDir.dirCount() - 1; i >= 0; i--) {
File dir = new File(baseDir.getDir(i).getPathName());
if (!engine.getPathCorrector().isRecursivePath(dir))
dirsToScan.add(baseDir.getDir(i));
}
final Runnable dirIterator =
new Runnable() {
@Override
public void run() {
// process next directory from list
if (dirsToScan.size() == 0 || scanControl.isStopped()) {
readyCallback.run();
return;
}
final FileInfo dir = dirsToScan.get(0);
dirsToScan.remove(0);
final Runnable callback = this;
BackgroundThread.instance()
.postGUI(
new Runnable() {
@Override
public void run() {
scanDirectory(db, dir, callback, true, scanControl);
}
});
}
};
dirIterator.run();
} else {
readyCallback.run();
}
}
} catch (Exception e) {
// treat as finished
readyCallback.run();
}
}
});
}