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package org.libreoffice.storage.external;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.preference.PreferenceManager;
import android.util.Log;
import org.libreoffice.R;
import org.libreoffice.storage.DocumentProviderSettingsActivity;
import org.libreoffice.storage.IFile;
import org.libreoffice.storage.IOUtils;
import org.libreoffice.storage.local.LocalFile;
import java.io.File;
import java.net.URI;
/**
* TODO: OTG currently uses LocalFile. Change to an IFile that handles abrupt OTG unmounting
*/
public class OTGDocumentsProvider implements IExternalDocumentProvider,
SharedPreferences.OnSharedPreferenceChangeListener {
private static final String LOGTAG = OTGDocumentsProvider.class.getSimpleName();
private String rootPathURI;
private int id;
public OTGDocumentsProvider(int id, Context context) {
this.id = id;
setupRootPath(context);
}
private void setupRootPath(Context context) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
rootPathURI = preferences.getString(
DocumentProviderSettingsActivity.KEY_PREF_OTG_PATH_URI, "");
}
@Override
public IFile createFromUri(Context context, URI uri) {
return new LocalFile(uri);
}
@Override
public int getNameResource() {
return R.string.otg_file_system;
}
@Override
public int getId() {
return id;
}
@Override
public IFile getRootDirectory(Context context) {
// TODO: handle this with more fine-grained exceptions
if(rootPathURI.equals("")) {
Log.e(LOGTAG, "rootPathURI is empty");
throw new RuntimeException(context.getString(R.string.ext_document_provider_error));
}
File f = IOUtils.getFileFromURIString(rootPathURI);
if(IOUtils.isInvalidFile(f)) {
Log.e(LOGTAG, "rootPathURI is invalid - missing device?");
throw new RuntimeException(context.getString(R.string.otg_missing_error));
}
return new LocalFile(f);
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
if (key.equals(DocumentProviderSettingsActivity.KEY_PREF_OTG_PATH_URI)) {
rootPathURI = sharedPreferences.getString(key, "");
}
}
@Override
public String guessRootURI(Context context) {
return "";
}
@Override
public boolean checkProviderAvailability(Context context) {
// check if system supports USB Host
return context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_USB_HOST);
}
}
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