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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.preferences;
import org.mozilla.gecko.R;
import org.mozilla.gecko.GeckoSharedPrefs;
import org.mozilla.gecko.util.ThreadUtils;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.res.TypedArray;
import android.content.SharedPreferences;
import android.widget.Button;
import android.util.AttributeSet;
import android.util.Log;
import java.util.Set;
/* Provides backwards compatibility for some old multi-choice pref types used by Gecko.
* This will import the old data from the old prefs the first time it is run.
*/
class MultiPrefMultiChoicePreference extends MultiChoicePreference {
private static final String LOGTAG = "GeckoMultiPrefPreference";
private static final String IMPORT_SUFFIX = "_imported_";
private final CharSequence[] keys;
public MultiPrefMultiChoicePreference(Context context, AttributeSet attrs) {
super(context, attrs);
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MultiPrefMultiChoicePreference);
keys = a.getTextArray(R.styleable.MultiPrefMultiChoicePreference_entryKeys);
a.recycle();
loadPersistedValues();
}
// Helper method for reading a boolean pref.
private boolean getPersistedBoolean(SharedPreferences prefs, String key, boolean defaultReturnValue) {
if (!isPersistent()) {
return defaultReturnValue;
}
return prefs.getBoolean(key, defaultReturnValue);
}
// Overridden to do a one time import for the old preference type to the new one.
@Override
protected synchronized void loadPersistedValues() {
// This will load the new pref if it exists.
super.loadPersistedValues();
// First check if we've already done the import the old data. If so, nothing to load.
final SharedPreferences prefs = GeckoSharedPrefs.forApp(getContext());
final boolean imported = getPersistedBoolean(prefs, getKey() + IMPORT_SUFFIX, false);
if (imported) {
return;
}
// Load the data we'll need to find the old style prefs
final CharSequence[] init = getInitialValues();
final CharSequence[] entries = getEntries();
if (keys == null || init == null) {
return;
}
final int entryCount = keys.length;
if (entryCount != entries.length || entryCount != init.length) {
throw new IllegalStateException("MultiChoicePreference entryKeys and initialValues arrays must be the same length");
}
// Now iterate through the entries on a background thread.
final SharedPreferences.Editor edit = prefs.edit();
ThreadUtils.postToBackgroundThread(new Runnable() {
@Override
public void run() {
try {
// Use one editor to batch as many changes as we can.
for (int i = 0; i < entryCount; i++) {
String key = keys[i].toString();
boolean initialValue = "true".equals(init[i]);
boolean val = getPersistedBoolean(prefs, key, initialValue);
// Save the pref and remove the old preference.
setValue(i, val);
edit.remove(key);
}
persist(edit);
edit.putBoolean(getKey() + IMPORT_SUFFIX, true);
edit.apply();
} catch (Exception ex) {
Log.i(LOGTAG, "Err", ex);
}
}
});
}
@Override
public void onClick(DialogInterface dialog, int which, boolean val) {
// enable positive button only if at least one item is checked
boolean enabled = false;
final Set<String> values = getValues();
enabled = (values.size() > 0);
final Button button = ((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE);
if (button.isEnabled() != enabled) {
button.setEnabled(enabled);
}
}
}
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