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      1 /*
      2  * Copyright (C) 2012 Google Inc.
      3  * Licensed to The Android Open Source Project.
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 package com.android.mail.ui;
     19 
     20 import android.app.AlertDialog;
     21 import android.content.Context;
     22 import android.content.DialogInterface;
     23 import android.content.DialogInterface.OnClickListener;
     24 import android.content.DialogInterface.OnDismissListener;
     25 import android.os.AsyncTask;
     26 import android.view.View;
     27 import android.widget.AdapterView;
     28 
     29 import com.android.mail.R;
     30 import com.android.mail.providers.Account;
     31 import com.android.mail.providers.Conversation;
     32 import com.android.mail.providers.Folder;
     33 import com.android.mail.providers.UIProvider;
     34 import com.android.mail.utils.LogTag;
     35 import com.android.mail.utils.LogUtils;
     36 
     37 import java.util.Collection;
     38 
     39 public abstract class FolderSelectionDialog implements OnClickListener, OnDismissListener {
     40     protected static final String LOG_TAG = LogTag.getLogTag();
     41     private static boolean sDialogShown;
     42 
     43     protected AlertDialog mDialog;
     44     protected final ConversationUpdater mUpdater;
     45     protected final SeparatedFolderListAdapter mAdapter;
     46     protected final Collection<Conversation> mTarget;
     47     protected final boolean mBatch;
     48     protected final QueryRunner mRunner;
     49     protected final Account mAccount;
     50     protected final AlertDialog.Builder mBuilder;
     51     protected final Folder mCurrentFolder;
     52 
     53     public static FolderSelectionDialog getInstance(final Context context, final Account account,
     54             final ConversationUpdater updater, final Collection<Conversation> target,
     55             final boolean isBatch, final Folder currentFolder, final boolean isMoveTo) {
     56         if (sDialogShown) {
     57             return null;
     58         }
     59 
     60         /*
     61          * TODO: This method should only be called with isMoveTo=true if this capability is not
     62          * present on the account, so we should be able to remove the check here.
     63          */
     64         if (isMoveTo || !account.supportsCapability(
     65                 UIProvider.AccountCapabilities.MULTIPLE_FOLDERS_PER_CONV)) {
     66             return new SingleFolderSelectionDialog(
     67                     context, account, updater, target, isBatch, currentFolder);
     68         } else {
     69             return new MultiFoldersSelectionDialog(
     70                     context, account, updater, target, isBatch, currentFolder);
     71         }
     72     }
     73 
     74     public static void setDialogDismissed() {
     75         LogUtils.d(LOG_TAG, "Folder Selection dialog dismissed");
     76         sDialogShown = false;
     77     }
     78 
     79     // TODO: use a loader instead
     80     @Deprecated
     81     protected abstract void updateAdapterInBackground(Context context);
     82 
     83     protected abstract void onListItemClick(int position);
     84 
     85     protected FolderSelectionDialog(final Context context, final Account account,
     86             final ConversationUpdater updater, final Collection<Conversation> target,
     87             final boolean isBatch, final Folder currentFolder) {
     88         mUpdater = updater;
     89         mTarget = target;
     90         mBatch = isBatch;
     91 
     92         final AlertDialog.Builder builder = new AlertDialog.Builder(context);
     93         builder.setNegativeButton(R.string.cancel, this);
     94         mAccount = account;
     95         mBuilder = builder;
     96         mCurrentFolder = currentFolder;
     97         mAdapter = new SeparatedFolderListAdapter();
     98         mRunner = new QueryRunner(context);
     99     }
    100 
    101     public void show() {
    102         sDialogShown = true;
    103         // TODO: use a loader instead
    104         mRunner.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    105     }
    106 
    107     protected void showInternal() {
    108         mDialog.show();
    109         mDialog.setOnDismissListener(this);
    110         mDialog.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
    111                 @Override
    112             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    113                 onListItemClick(position);
    114             }
    115         });
    116     }
    117 
    118     @Override
    119     public void onDismiss(DialogInterface dialog) {
    120         FolderSelectionDialog.setDialogDismissed();
    121     }
    122 
    123     /**
    124      * Class to query the Folder list database in the background and update the
    125      * adapter with an open cursor.
    126      */
    127     // TODO: use a loader instead
    128     @Deprecated
    129     private class QueryRunner extends AsyncTask<Void, Void, Void> {
    130         private final Context mContext;
    131 
    132         private QueryRunner(final Context context) {
    133             mContext = context;
    134         }
    135 
    136         @Override
    137         protected Void doInBackground(Void... v) {
    138             updateAdapterInBackground(mContext);
    139             return null;
    140         }
    141 
    142         @Override
    143         protected void onPostExecute(Void v) {
    144             mDialog = mBuilder.create();
    145             showInternal();
    146         }
    147     }
    148 }
    149