AccountSelectorAdapter.java revision dc78a769fce18d259eccc602c4623fa74cdf5319 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.email.activity;
18
19import com.android.email.R;
20import com.android.email.UiUtilities;
21import com.android.email.data.ClosingMatrixCursor;
22import com.android.email.data.ThrottlingCursorLoader;
23import com.android.emailcommon.provider.EmailContent;
24import com.android.emailcommon.provider.EmailContent.Account;
25import com.android.emailcommon.provider.EmailContent.Mailbox;
26import com.android.emailcommon.utility.Utility;
27
28import android.content.Context;
29import android.content.Loader;
30import android.database.Cursor;
31import android.database.MatrixCursor;
32import android.database.MatrixCursor.RowBuilder;
33import android.view.LayoutInflater;
34import android.view.View;
35import android.view.ViewGroup;
36import android.widget.CursorAdapter;
37import android.widget.TextView;
38
39/**
40 * Adapter for the account selector on {@link MessageListXL}.
41 *
42 * TODO Test it!
43 * TODO Use layout?  Or use the standard resources that ActionBarDemo uses?
44 * TODO Revisit the sort order when we get more detailed UI spec.  (current sort order makes things
45 * simpler for now.)  Maybe we can just use SimpleCursorAdapter.
46 */
47public class AccountSelectorAdapter extends CursorAdapter {
48    /** Projection used to query from Account */
49    private static final String[] ACCOUNT_PROJECTION = new String[] {
50        EmailContent.RECORD_ID,
51        EmailContent.Account.DISPLAY_NAME,
52        EmailContent.Account.EMAIL_ADDRESS,
53    };
54
55    /**
56     * Projection for the resulting MatrixCursor -- must be {@link #ACCOUNT_PROJECTION}
57     * with "UNREAD_COUNT".
58     */
59    private static final String[] RESULT_PROJECTION = new String[] {
60        EmailContent.RECORD_ID,
61        EmailContent.Account.DISPLAY_NAME,
62        EmailContent.Account.EMAIL_ADDRESS,
63        "UNREAD_COUNT"
64    };
65
66    private static final int ID_COLUMN = 0;
67    private static final int DISPLAY_NAME_COLUMN = 1;
68    private static final int EMAIL_ADDRESS_COLUMN = 2;
69    private static final int UNREAD_COUNT_COLUMN = 3;
70
71    /** Sort order.  Show the default account first. */
72    private static final String ORDER_BY =
73            EmailContent.Account.IS_DEFAULT + " desc, " + EmailContent.Account.RECORD_ID;
74
75    private final LayoutInflater mInflater;
76    private final Context mContext;
77
78    public static Loader<Cursor> createLoader(Context context) {
79        return new AccountsLoader(context);
80    }
81
82    public AccountSelectorAdapter(Context context, Cursor c) {
83        super(context, c, 0 /* no auto-requery */);
84        mContext = context;
85        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
86    }
87
88    @Override
89    public View getDropDownView(int position, View convertView, ViewGroup parent) {
90        final View view = mInflater.inflate(R.layout.account_selector_dropdown, parent, false);
91
92        final TextView displayNameView = (TextView) view.findViewById(R.id.display_name);
93        final TextView emailAddressView = (TextView) view.findViewById(R.id.email_address);
94        final TextView unreadCountView = (TextView) view.findViewById(R.id.unread_count);
95
96        final String displayName = getAccountDisplayName(position);
97        final String emailAddress = getAccountEmailAddress(position);
98
99        displayNameView.setText(displayName);
100
101        // Show the email address only when it's different from the display name.
102        if (emailAddress.equals(displayName)) {
103            emailAddressView.setVisibility(View.GONE);
104        } else {
105            emailAddressView.setVisibility(View.VISIBLE);
106            emailAddressView.setText(emailAddress);
107        }
108
109        unreadCountView.setText(UiUtilities.getMessageCountForUi(mContext,
110                getAccountUnreadCount(position), false));
111        return view;
112    }
113
114    @Override
115    public void bindView(View view, Context context, Cursor cursor) {
116        TextView textView = (TextView) view.findViewById(R.id.display_name);
117        textView.setText(getAccountDisplayName(cursor));
118    }
119
120    @Override
121    public View newView(Context context, Cursor cursor, ViewGroup parent) {
122        return mInflater.inflate(R.layout.account_selector, parent, false);
123    }
124
125    /** @return Account id extracted from a Cursor. */
126    public static long getAccountId(Cursor c) {
127        return c.getLong(ID_COLUMN);
128    }
129
130    private String getAccountDisplayName(int position) {
131        final Cursor c = getCursor();
132        return c.moveToPosition(position) ? getAccountDisplayName(c) : null;
133    }
134
135    private String getAccountEmailAddress(int position) {
136        final Cursor c = getCursor();
137        return c.moveToPosition(position) ? getAccountEmailAddress(c) : null;
138    }
139
140    private int getAccountUnreadCount(int position) {
141        final Cursor c = getCursor();
142        return c.moveToPosition(position) ? getAccountUnreadCount(c) : 0;
143    }
144
145    /** @return Account name extracted from a Cursor. */
146    public static String getAccountDisplayName(Cursor cursor) {
147        return cursor.getString(DISPLAY_NAME_COLUMN);
148    }
149
150    /** @return Email address extracted from a Cursor. */
151    public static String getAccountEmailAddress(Cursor cursor) {
152        return cursor.getString(EMAIL_ADDRESS_COLUMN);
153    }
154
155    /** @return Unread count extracted from a Cursor. */
156    public static int getAccountUnreadCount(Cursor cursor) {
157        return cursor.getInt(UNREAD_COUNT_COLUMN);
158    }
159
160    /**
161     * Load the account list.  The resulting cursor contains
162     * - Account info
163     * - # of unread messages in inbox
164     * - The "Combined view" row if there's more than one account.
165     */
166    /* package */ static class AccountsLoader extends ThrottlingCursorLoader {
167        private final Context mContext;
168
169        public AccountsLoader(Context context) {
170            // Super class loads a regular account cursor, but we replace it in loadInBackground().
171            super(context, EmailContent.Account.CONTENT_URI, ACCOUNT_PROJECTION, null, null,
172                    ORDER_BY);
173            mContext = context;
174        }
175
176        @Override
177        public Cursor loadInBackground() {
178            // Fetch account list
179            final Cursor accountsCursor = super.loadInBackground();
180
181            // Cursor that's actually returned.
182            // Use ClosingMatrixCursor so that accountsCursor gets closed too when it's closed.
183            final MatrixCursor resultCursor = new ClosingMatrixCursor(RESULT_PROJECTION,
184                    accountsCursor);
185            accountsCursor.moveToPosition(-1);
186
187            // Build the cursor...
188            int totalUnread = 0;
189            while (accountsCursor.moveToNext()) {
190                // Add account, with its unread count.
191                final long accountId = accountsCursor.getLong(0);
192                final int unread = Mailbox.getUnreadCountByAccountAndMailboxType(
193                        mContext, accountId, Mailbox.TYPE_INBOX);
194
195                RowBuilder rb = resultCursor.newRow();
196                rb.add(accountId);
197                rb.add(getAccountDisplayName(accountsCursor));
198                rb.add(getAccountEmailAddress(accountsCursor));
199                rb.add(unread);
200                totalUnread += unread;
201            }
202            // Add "combined view"
203            final int countAccounts = resultCursor.getCount();
204            if (countAccounts > 1) {
205                RowBuilder rb = resultCursor.newRow();
206
207                // Add ID, display name, # of accounts, total unread count.
208                rb.add(Account.ACCOUNT_ID_COMBINED_VIEW);
209                rb.add(mContext.getResources().getString(
210                        R.string.mailbox_list_account_selector_combined_view));
211                rb.add(mContext.getResources().getQuantityString(R.plurals.number_of_accounts,
212                        countAccounts, countAccounts));
213                rb.add(totalUnread);
214            }
215            return Utility.CloseTraceCursorWrapper.get(resultCursor);
216        }
217    }
218}
219