The Tor Browser: comparison mobile/android/base/webapp/Allocator.java

--1:000000000000
+:4f635ccb72cc
+/* -*- 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.webapp;
+import java.util.ArrayList;
+import org.mozilla.gecko.GeckoAppShell;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.util.Log;
+public class Allocator {
+private final String LOGTAG = "GeckoWebappAllocator";
+private static final String PREFIX_ORIGIN = "webapp-origin-";
+private static final String PREFIX_PACKAGE_NAME = "webapp-package-name-";
+// These prefixes are for prefs used by the old shortcut-based runtime.
+// We define them here so maybeMigrateOldPrefs can migrate them to their
+// new equivalents if this app was originally installed as a shortcut.
+// Maybe we can remove this code in the future!
+private static final String PREFIX_OLD_APP = "app";
+private static final String PREFIX_OLD_ICON = "icon";
+// The number of Webapp# and WEBAPP# activities/apps/intents
+private final static int MAX_WEB_APPS = 100;
+protected static Allocator sInstance = null;
+public static Allocator getInstance() {
+return getInstance(GeckoAppShell.getContext());
+}
+public static synchronized Allocator getInstance(Context cx) {
+if (sInstance == null) {
+sInstance = new Allocator(cx);
+}
+return sInstance;
+}
+SharedPreferences mPrefs;
+protected Allocator(Context context) {
+mPrefs = context.getSharedPreferences("webapps", Context.MODE_PRIVATE | Context.MODE_MULTI_PROCESS);
+}
+private static String appKey(int index) {
+return PREFIX_PACKAGE_NAME + index;
+}
+public static String iconKey(int index) {
+return "web-app-color-" + index;
+}
+public static String originKey(int i) {
+return PREFIX_ORIGIN + i;
+}
+private static String oldAppKey(int index) {
+return PREFIX_OLD_APP + index;
+}
+private static String oldIconKey(int index) {
+return PREFIX_OLD_ICON + index;
+}
+private static void save(Editor editor) {
+// Use SharedPreferences.Editor.apply() where available and commit()
+// where it isn't.  We could also use a background thread with commit(),
+// but our callers might expect the changes we make to be available
+// immediately, so we instead take the commit() performance hit
+// on the small percentage of extant devices that don't support apply().
+if (android.os.Build.VERSION.SDK_INT > 8) {
+editor.apply();
+} else {
+editor.commit();
+}
+}
+public ArrayList<String> getInstalledPackageNames() {
+ArrayList<String> installedPackages = new ArrayList<String>();
+for (int i = 0; i < MAX_WEB_APPS; ++i) {
+if (mPrefs.contains(appKey(i))) {
+installedPackages.add(mPrefs.getString(appKey(i), ""));
+}
+}
+return installedPackages;
+}
+public synchronized int findOrAllocatePackage(final String packageName) {
+int index = getIndexForApp(packageName);
+if (index != -1)
+return index;
+for (int i = 0; i < MAX_WEB_APPS; ++i) {
+if (!mPrefs.contains(appKey(i))) {
+// found unused index i
+putPackageName(i, packageName);
+return i;
+}
+}
+// no more apps!
+return -1;
+}
+public synchronized void putPackageName(final int index, final String packageName) {
+save(mPrefs.edit().putString(appKey(index), packageName));
+}
+public void updateColor(int index, int color) {
+save(mPrefs.edit().putInt(iconKey(index), color));
+}
+public synchronized int getIndexForApp(String packageName) {
+return findSlotForPrefix(PREFIX_PACKAGE_NAME, packageName);
+}
+public synchronized int getIndexForOrigin(String origin) {
+return findSlotForPrefix(PREFIX_ORIGIN, origin);
+}
+protected int findSlotForPrefix(String prefix, String value) {
+for (int i = 0; i < MAX_WEB_APPS; ++i) {
+if (mPrefs.getString(prefix + i, "").equals(value)) {
+return i;
+}
+}
+return -1;
+}
+public synchronized String getAppForIndex(int index) {
+return mPrefs.getString(appKey(index), null);
+}
+public synchronized int releaseIndexForApp(String app) {
+int index = getIndexForApp(app);
+if (index == -1)
+return -1;
+releaseIndex(index);
+return index;
+}
+public synchronized void releaseIndex(final int index) {
+save(mPrefs.edit().remove(appKey(index)).remove(iconKey(index)).remove(originKey(index)));
+}
+public void putOrigin(int index, String origin) {
+save(mPrefs.edit().putString(originKey(index), origin));
+}
+public String getOrigin(int index) {
+return mPrefs.getString(originKey(index), null);
+}
+public int getColor(int index) {
+return mPrefs.getInt(iconKey(index), -1);
+}
+/**
+* Migrate old prefs to their new equivalents if this app was originally
+* installed by the shortcut-based implementation.
+*/
+public void maybeMigrateOldPrefs(int index) {
+if (!mPrefs.contains(oldAppKey(index))) {
+return;
+}
+Log.i(LOGTAG, "migrating old prefs");
+// The old appKey pref stored the origin, while the new appKey pref
+// stores the packageName, so we migrate oldAppKey to the origin pref.
+putOrigin(index, mPrefs.getString(oldAppKey(index), null));
+// The old iconKey pref actually stored the splash screen background
+// color, so we migrate oldIconKey to the color pref.
+updateColor(index, mPrefs.getInt(oldIconKey(index), -1));
+// Remove the old prefs so we don't migrate them the next time around.
+save(mPrefs.edit().remove(oldAppKey(index)).remove(oldIconKey(index)));
+}
+}

The Tor Browser / file comparison

comparison: mobile/android/base/webapp/Allocator.java

mobile/android/base/webapp/Allocator.java