1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/base/webapp/Allocator.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,190 @@
1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +package org.mozilla.gecko.webapp;
1.10 +
1.11 +import java.util.ArrayList;
1.12 +
1.13 +import org.mozilla.gecko.GeckoAppShell;
1.14 +
1.15 +import android.content.Context;
1.16 +import android.content.SharedPreferences;
1.17 +import android.content.SharedPreferences.Editor;
1.18 +import android.util.Log;
1.19 +
1.20 +public class Allocator {
1.21 +
1.22 + private final String LOGTAG = "GeckoWebappAllocator";
1.23 +
1.24 + private static final String PREFIX_ORIGIN = "webapp-origin-";
1.25 + private static final String PREFIX_PACKAGE_NAME = "webapp-package-name-";
1.26 +
1.27 + // These prefixes are for prefs used by the old shortcut-based runtime.
1.28 + // We define them here so maybeMigrateOldPrefs can migrate them to their
1.29 + // new equivalents if this app was originally installed as a shortcut.
1.30 + // Maybe we can remove this code in the future!
1.31 + private static final String PREFIX_OLD_APP = "app";
1.32 + private static final String PREFIX_OLD_ICON = "icon";
1.33 +
1.34 + // The number of Webapp# and WEBAPP# activities/apps/intents
1.35 + private final static int MAX_WEB_APPS = 100;
1.36 +
1.37 + protected static Allocator sInstance = null;
1.38 + public static Allocator getInstance() {
1.39 + return getInstance(GeckoAppShell.getContext());
1.40 + }
1.41 +
1.42 + public static synchronized Allocator getInstance(Context cx) {
1.43 + if (sInstance == null) {
1.44 + sInstance = new Allocator(cx);
1.45 + }
1.46 +
1.47 + return sInstance;
1.48 + }
1.49 +
1.50 + SharedPreferences mPrefs;
1.51 +
1.52 + protected Allocator(Context context) {
1.53 + mPrefs = context.getSharedPreferences("webapps", Context.MODE_PRIVATE | Context.MODE_MULTI_PROCESS);
1.54 + }
1.55 +
1.56 + private static String appKey(int index) {
1.57 + return PREFIX_PACKAGE_NAME + index;
1.58 + }
1.59 +
1.60 + public static String iconKey(int index) {
1.61 + return "web-app-color-" + index;
1.62 + }
1.63 +
1.64 + public static String originKey(int i) {
1.65 + return PREFIX_ORIGIN + i;
1.66 + }
1.67 +
1.68 + private static String oldAppKey(int index) {
1.69 + return PREFIX_OLD_APP + index;
1.70 + }
1.71 +
1.72 + private static String oldIconKey(int index) {
1.73 + return PREFIX_OLD_ICON + index;
1.74 + }
1.75 +
1.76 + private static void save(Editor editor) {
1.77 + // Use SharedPreferences.Editor.apply() where available and commit()
1.78 + // where it isn't. We could also use a background thread with commit(),
1.79 + // but our callers might expect the changes we make to be available
1.80 + // immediately, so we instead take the commit() performance hit
1.81 + // on the small percentage of extant devices that don't support apply().
1.82 + if (android.os.Build.VERSION.SDK_INT > 8) {
1.83 + editor.apply();
1.84 + } else {
1.85 + editor.commit();
1.86 + }
1.87 + }
1.88 +
1.89 + public ArrayList<String> getInstalledPackageNames() {
1.90 + ArrayList<String> installedPackages = new ArrayList<String>();
1.91 +
1.92 + for (int i = 0; i < MAX_WEB_APPS; ++i) {
1.93 + if (mPrefs.contains(appKey(i))) {
1.94 + installedPackages.add(mPrefs.getString(appKey(i), ""));
1.95 + }
1.96 + }
1.97 + return installedPackages;
1.98 + }
1.99 +
1.100 + public synchronized int findOrAllocatePackage(final String packageName) {
1.101 + int index = getIndexForApp(packageName);
1.102 + if (index != -1)
1.103 + return index;
1.104 +
1.105 + for (int i = 0; i < MAX_WEB_APPS; ++i) {
1.106 + if (!mPrefs.contains(appKey(i))) {
1.107 + // found unused index i
1.108 + putPackageName(i, packageName);
1.109 + return i;
1.110 + }
1.111 + }
1.112 +
1.113 + // no more apps!
1.114 + return -1;
1.115 + }
1.116 +
1.117 + public synchronized void putPackageName(final int index, final String packageName) {
1.118 + save(mPrefs.edit().putString(appKey(index), packageName));
1.119 + }
1.120 +
1.121 + public void updateColor(int index, int color) {
1.122 + save(mPrefs.edit().putInt(iconKey(index), color));
1.123 + }
1.124 +
1.125 + public synchronized int getIndexForApp(String packageName) {
1.126 + return findSlotForPrefix(PREFIX_PACKAGE_NAME, packageName);
1.127 + }
1.128 +
1.129 + public synchronized int getIndexForOrigin(String origin) {
1.130 + return findSlotForPrefix(PREFIX_ORIGIN, origin);
1.131 + }
1.132 +
1.133 + protected int findSlotForPrefix(String prefix, String value) {
1.134 + for (int i = 0; i < MAX_WEB_APPS; ++i) {
1.135 + if (mPrefs.getString(prefix + i, "").equals(value)) {
1.136 + return i;
1.137 + }
1.138 + }
1.139 + return -1;
1.140 + }
1.141 +
1.142 + public synchronized String getAppForIndex(int index) {
1.143 + return mPrefs.getString(appKey(index), null);
1.144 + }
1.145 +
1.146 + public synchronized int releaseIndexForApp(String app) {
1.147 + int index = getIndexForApp(app);
1.148 + if (index == -1)
1.149 + return -1;
1.150 +
1.151 + releaseIndex(index);
1.152 + return index;
1.153 + }
1.154 +
1.155 + public synchronized void releaseIndex(final int index) {
1.156 + save(mPrefs.edit().remove(appKey(index)).remove(iconKey(index)).remove(originKey(index)));
1.157 + }
1.158 +
1.159 + public void putOrigin(int index, String origin) {
1.160 + save(mPrefs.edit().putString(originKey(index), origin));
1.161 + }
1.162 +
1.163 + public String getOrigin(int index) {
1.164 + return mPrefs.getString(originKey(index), null);
1.165 + }
1.166 +
1.167 + public int getColor(int index) {
1.168 + return mPrefs.getInt(iconKey(index), -1);
1.169 + }
1.170 +
1.171 + /**
1.172 + * Migrate old prefs to their new equivalents if this app was originally
1.173 + * installed by the shortcut-based implementation.
1.174 + */
1.175 + public void maybeMigrateOldPrefs(int index) {
1.176 + if (!mPrefs.contains(oldAppKey(index))) {
1.177 + return;
1.178 + }
1.179 +
1.180 + Log.i(LOGTAG, "migrating old prefs");
1.181 +
1.182 + // The old appKey pref stored the origin, while the new appKey pref
1.183 + // stores the packageName, so we migrate oldAppKey to the origin pref.
1.184 + putOrigin(index, mPrefs.getString(oldAppKey(index), null));
1.185 +
1.186 + // The old iconKey pref actually stored the splash screen background
1.187 + // color, so we migrate oldIconKey to the color pref.
1.188 + updateColor(index, mPrefs.getInt(oldIconKey(index), -1));
1.189 +
1.190 + // Remove the old prefs so we don't migrate them the next time around.
1.191 + save(mPrefs.edit().remove(oldAppKey(index)).remove(oldIconKey(index)));
1.192 + }
1.193 +}
