The Tor Browser: mobile/android/base/webapp/Allocator.java@fc2d59ddac77 (annotated)

mobile/android/base/webapp/Allocator.java@fc2d59ddac77 (annotated)

mobile/android/base/webapp/Allocator.java

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /* -*- 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)));
     }
 }

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mobile/android/base/webapp/Allocator.java@fc2d59ddac77 (annotated)

mobile/android/base/webapp/Allocator.java