1/*
2 * Copyright (C) 2016 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.deskclock;
18
19import android.content.Context;
20import android.widget.TextView;
21
22import com.android.deskclock.uidata.UiDataModel;
23
24import static android.text.format.DateUtils.HOUR_IN_MILLIS;
25import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
26import static android.text.format.DateUtils.SECOND_IN_MILLIS;
27
28/**
29 * A controller which will format a provided time in millis to display as a stopwatch.
30 */
31public final class StopwatchTextController {
32
33    private final TextView mMainTextView;
34    private final TextView mHundredthsTextView;
35
36    private long mLastTime = Long.MIN_VALUE;
37
38    public StopwatchTextController(TextView mainTextView, TextView hundredthsTextView) {
39        mMainTextView = mainTextView;
40        mHundredthsTextView = hundredthsTextView;
41    }
42
43    public void setTimeString(long accumulatedTime) {
44        // Since time is only displayed to centiseconds, if there is a change at the milliseconds
45        // level but not the centiseconds level, we can avoid unnecessary work.
46        if ((mLastTime / 10) == (accumulatedTime / 10)) {
47            return;
48        }
49
50        final int hours = (int) (accumulatedTime / HOUR_IN_MILLIS);
51        int remainder = (int) (accumulatedTime % HOUR_IN_MILLIS);
52
53        final int minutes = (int) (remainder / MINUTE_IN_MILLIS);
54        remainder = (int) (remainder % MINUTE_IN_MILLIS);
55
56        final int seconds = (int) (remainder / SECOND_IN_MILLIS);
57        remainder = (int) (remainder % SECOND_IN_MILLIS);
58
59        mHundredthsTextView.setText(UiDataModel.getUiDataModel().getFormattedNumber(
60                remainder / 10, 2));
61
62        // Avoid unnecessary computations and garbage creation if seconds have not changed since
63        // last layout pass.
64        if ((mLastTime / SECOND_IN_MILLIS) != (accumulatedTime / SECOND_IN_MILLIS)) {
65            final Context context = mMainTextView.getContext();
66            final String time = Utils.getTimeString(context, hours, minutes, seconds);
67            mMainTextView.setText(time);
68        }
69        mLastTime = accumulatedTime;
70    }
71}
72