AccountSelectorAdapter.java revision 8112732376d4cc033ee515a6531852ef42266929 
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.data.ClosingMatrixCursor;
21import com.android.email.data.ThrottlingCursorLoader;
22import com.android.emailcommon.provider.EmailContent;
23import com.android.emailcommon.provider.EmailContent.Account;
24import com.android.emailcommon.provider.EmailContent.Mailbox;
25import com.android.emailcommon.utility.Utility;
26
27import android.content.Context;
28import android.content.Loader;
29import android.database.Cursor;
30import android.database.MatrixCursor;
31import android.database.MatrixCursor.RowBuilder;
32import android.view.LayoutInflater;
33import android.view.View;
34import android.view.ViewGroup;
35import android.widget.CursorAdapter;
36import android.widget.TextView;
37
38/**
39 * Adapter for the account selector on {@link UIControllerTwoPane}.
40 *
41 * TODO Test it!
42 */
43public class AccountSelectorAdapter extends CursorAdapter {
44    /** Projection used to query from Account */
45    private static final String[] ACCOUNT_PROJECTION = new String[] {
46        EmailContent.RECORD_ID,
47        EmailContent.Account.DISPLAY_NAME,
48        EmailContent.Account.EMAIL_ADDRESS,
49    };
50
51    /**
52     * Projection for the resulting MatrixCursor -- must be {@link #ACCOUNT_PROJECTION}
53     * with "UNREAD_COUNT".
54     */
55    private static final String[] RESULT_PROJECTION = new String[] {
56        EmailContent.RECORD_ID,
57        EmailContent.Account.DISPLAY_NAME,
58        EmailContent.Account.EMAIL_ADDRESS,
59        "UNREAD_COUNT"
60    };
61
62    private static final int ID_COLUMN = 0;
63    private static final int DISPLAY_NAME_COLUMN = 1;
64    private static final int EMAIL_ADDRESS_COLUMN = 2;
65    private static final int UNREAD_COUNT_COLUMN = 3;
66
67    /** Sort order.  Show the default account first. */
68    private static final String ORDER_BY =
69            EmailContent.Account.IS_DEFAULT + " desc, " + EmailContent.Account.RECORD_ID;
70
71    private final LayoutInflater mInflater;
72    private final Context mContext;
73
74    public static Loader<Cursor> createLoader(Context context) {
75        return new AccountsLoader(context);
76    }
77
78    public AccountSelectorAdapter(Context context) {
79        super(context, null, 0 /* no auto-requery */);
80        mContext = context;
81        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
82    }
83
84    @Override
85    public View getDropDownView(int position, View convertView, ViewGroup parent) {
86        final View view = mInflater.inflate(R.layout.account_selector_dropdown, parent, false);
87
88        final TextView displayNameView = (TextView) view.findViewById(R.id.display_name);
89        final TextView emailAddressView = (TextView) view.findViewById(R.id.email_address);
90        final TextView unreadCountView = (TextView) view.findViewById(R.id.unread_count);
91
92        final String displayName = getAccountDisplayName(position);
93        final String emailAddress = getAccountEmailAddress(position);
94
95        displayNameView.setText(displayName);
96
97        // Show the email address only when it's different from the display name.
98        if (emailAddress.equals(displayName)) {
99            emailAddressView.setVisibility(View.GONE);
100        } else {
101            emailAddressView.setVisibility(View.VISIBLE);
102            emailAddressView.setText(emailAddress);
103        }
104
105        unreadCountView.setText(UiUtilities.getMessageCountForUi(mContext,
106                getAccountUnreadCount(position), false));
107        return view;
108    }
109
110    @Override
111    public void bindView(View view, Context context, Cursor cursor) {
112        TextView textView = (TextView) view.findViewById(R.id.display_name);
113        textView.setText(getAccountDisplayName(cursor));
114    }
115
116    @Override
117    public View newView(Context context, Cursor cursor, ViewGroup parent) {
118        return mInflater.inflate(R.layout.account_selector, parent, false);
119    }
120
121    /** @return Account id extracted from a Cursor. */
122    public static long getAccountId(Cursor c) {
123        return c.getLong(ID_COLUMN);
124    }
125
126    private String getAccountDisplayName(int position) {
127        final Cursor c = getCursor();
128        return c.moveToPosition(position) ? getAccountDisplayName(c) : null;
129    }
130
131    private String getAccountEmailAddress(int position) {
132        final Cursor c = getCursor();
133        return c.moveToPosition(position) ? getAccountEmailAddress(c) : null;
134    }
135
136    private int getAccountUnreadCount(int position) {
137        final Cursor c = getCursor();
138        return c.moveToPosition(position) ? getAccountUnreadCount(c) : 0;
139    }
140
141    /** @return Account name extracted from a Cursor. */
142    public static String getAccountDisplayName(Cursor cursor) {
143        return cursor.getString(DISPLAY_NAME_COLUMN);
144    }
145
146    /** @return Email address extracted from a Cursor. */
147    public static String getAccountEmailAddress(Cursor cursor) {
148        return cursor.getString(EMAIL_ADDRESS_COLUMN);
149    }
150
151    /** @return Unread count extracted from a Cursor. */
152    public static int getAccountUnreadCount(Cursor cursor) {
153        return cursor.getInt(UNREAD_COUNT_COLUMN);
154    }
155
156    /**
157     * Load the account list.  The resulting cursor contains
158     * - Account info
159     * - # of unread messages in inbox
160     * - The "Combined view" row if there's more than one account.
161     */
162    /* package */ static class AccountsLoader extends ThrottlingCursorLoader {
163        private final Context mContext;
164
165        public AccountsLoader(Context context) {
166            // Super class loads a regular account cursor, but we replace it in loadInBackground().
167            super(context, EmailContent.Account.CONTENT_URI, ACCOUNT_PROJECTION, null, null,
168                    ORDER_BY);
169            mContext = context;
170        }
171
172        @Override
173        public Cursor loadInBackground() {
174            // Fetch account list
175            final Cursor accountsCursor = super.loadInBackground();
176
177            // Cursor that's actually returned.
178            // Use ClosingMatrixCursor so that accountsCursor gets closed too when it's closed.
179            final MatrixCursor resultCursor = new ClosingMatrixCursor(RESULT_PROJECTION,
180                    accountsCursor);
181            accountsCursor.moveToPosition(-1);
182
183            // Build the cursor...
184            int totalUnread = 0;
185            while (accountsCursor.moveToNext()) {
186                // Add account, with its unread count.
187                final long accountId = accountsCursor.getLong(0);
188                final int unread = Mailbox.getUnreadCountByAccountAndMailboxType(
189                        mContext, accountId, Mailbox.TYPE_INBOX);
190
191                RowBuilder rb = resultCursor.newRow();
192                rb.add(accountId);
193                rb.add(getAccountDisplayName(accountsCursor));
194                rb.add(getAccountEmailAddress(accountsCursor));
195                rb.add(unread);
196                totalUnread += unread;
197            }
198            // Add "combined view"
199            final int countAccounts = resultCursor.getCount();
200            if (countAccounts > 1) {
201                RowBuilder rb = resultCursor.newRow();
202
203                // Add ID, display name, # of accounts, total unread count.
204                rb.add(Account.ACCOUNT_ID_COMBINED_VIEW);
205                rb.add(mContext.getResources().getString(
206                        R.string.mailbox_list_account_selector_combined_view));
207                rb.add(mContext.getResources().getQuantityString(R.plurals.number_of_accounts,
208                        countAccounts, countAccounts));
209                rb.add(totalUnread);
210            }
211            return Utility.CloseTraceCursorWrapper.get(resultCursor);
212        }
213    }
214}
215