michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko;
michael@0: 
michael@0: import org.mozilla.gecko.gfx.BitmapUtils;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.content.SharedPreferences;
michael@0: import android.content.SharedPreferences.Editor;
michael@0: import android.graphics.Bitmap;
michael@0: import android.util.Log;
michael@0: 
michael@0: import java.util.ArrayList;
michael@0: 
michael@0: public class WebappAllocator {
michael@0:     private final String LOGTAG = "GeckoWebappAllocator";
michael@0:     // The number of Webapp# and WEBAPP# activites/apps/intents
michael@0:     private final static int MAX_WEB_APPS = 100;
michael@0: 
michael@0:     protected static WebappAllocator sInstance = null;
michael@0:     public static WebappAllocator getInstance() {
michael@0:         return getInstance(GeckoAppShell.getContext());
michael@0:     }
michael@0: 
michael@0:     public static synchronized WebappAllocator getInstance(Context cx) {
michael@0:         if (sInstance == null) {
michael@0:             sInstance = new WebappAllocator(cx);
michael@0:         }
michael@0: 
michael@0:         return sInstance;
michael@0:     }
michael@0: 
michael@0:     SharedPreferences mPrefs;
michael@0: 
michael@0:     protected WebappAllocator(Context context) {
michael@0:         mPrefs = context.getSharedPreferences("webapps", Context.MODE_PRIVATE | Context.MODE_MULTI_PROCESS);
michael@0:     }
michael@0: 
michael@0:     public static String appKey(int index) {
michael@0:         return "app" + index;
michael@0:     }
michael@0: 
michael@0:     static public String iconKey(int index) {
michael@0:         return "icon" + index;
michael@0:     }
michael@0: 
michael@0:     public synchronized int findAndAllocateIndex(String app, String name, String aIconData) {
michael@0:         Bitmap icon = (aIconData != null) ? BitmapUtils.getBitmapFromDataURI(aIconData) : null;
michael@0:         return findAndAllocateIndex(app, name, icon);
michael@0:     }
michael@0: 
michael@0:     public synchronized int findAndAllocateIndex(final String app, final String name, final Bitmap aIcon) {
michael@0:         int index = getIndexForApp(app);
michael@0:         if (index != -1)
michael@0:             return index;
michael@0: 
michael@0:         for (int i = 0; i < MAX_WEB_APPS; ++i) {
michael@0:             if (!mPrefs.contains(appKey(i))) {
michael@0:                 // found unused index i
michael@0:                 updateAppAllocation(app, i, aIcon);
michael@0:                 return i;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         // no more apps!
michael@0:         return -1;
michael@0:     }
michael@0: 
michael@0:     public synchronized void updateAppAllocation(final String app,
michael@0:                                                  final int index,
michael@0:                                                  final Bitmap aIcon) {
michael@0:         if (aIcon != null) {
michael@0:             ThreadUtils.getBackgroundHandler().post(new Runnable() {
michael@0:                 @Override
michael@0:                 public void run() {
michael@0:                     int color = 0;
michael@0:                     try {
michael@0:                         color = BitmapUtils.getDominantColor(aIcon);
michael@0:                     } catch (Exception e) {
michael@0:                         Log.e(LOGTAG, "Exception during getDominantColor", e);
michael@0:                     }
michael@0:                     mPrefs.edit()
michael@0:                           .putString(appKey(index), app)
michael@0:                           .putInt(iconKey(index), color).commit();
michael@0:                 }
michael@0:             });
michael@0:         } else {
michael@0:             mPrefs.edit()
michael@0:                   .putString(appKey(index), app)
michael@0:                   .putInt(iconKey(index), 0).commit();
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     public synchronized int getIndexForApp(String app) {
michael@0:         for (int i = 0; i < MAX_WEB_APPS; ++i) {
michael@0:             if (mPrefs.getString(appKey(i), "").equals(app)) {
michael@0:                 return i;
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         return -1;
michael@0:     }
michael@0: 
michael@0:     public synchronized String getAppForIndex(int index) {
michael@0:         return mPrefs.getString(appKey(index), null);
michael@0:     }
michael@0: 
michael@0:     public synchronized int releaseIndexForApp(String app) {
michael@0:         int index = getIndexForApp(app);
michael@0:         if (index == -1)
michael@0:             return -1;
michael@0: 
michael@0:         releaseIndex(index);
michael@0:         return index;
michael@0:     }
michael@0: 
michael@0:     public synchronized void releaseIndex(final int index) {
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 mPrefs.edit()
michael@0:                     .remove(appKey(index))
michael@0:                     .remove(iconKey(index))
michael@0:                     .commit();
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: }