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