1/*
2 * Copyright (C) 2015 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.systemui.volume;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.util.ArrayMap;
22import android.util.TypedValue;
23import android.view.View;
24import android.view.View.OnAttachStateChangeListener;
25import android.widget.TextView;
26
27/**
28 * Capture initial sp values for registered textviews, and update properly when configuration
29 * changes.
30 */
31public class SpTexts {
32
33    private final Context mContext;
34    private final ArrayMap<TextView, Integer> mTexts = new ArrayMap<>();
35
36    public SpTexts(Context context) {
37        mContext = context;
38    }
39
40    public int add(final TextView text) {
41        if (text == null) return 0;
42        final Resources res = mContext.getResources();
43        final float fontScale = res.getConfiguration().fontScale;
44        final float density = res.getDisplayMetrics().density;
45        final float px = text.getTextSize();
46        final int sp = (int)(px / fontScale / density);
47        mTexts.put(text, sp);
48        text.addOnAttachStateChangeListener(new OnAttachStateChangeListener() {
49            @Override
50            public void onViewDetachedFromWindow(View v) {
51            }
52
53            @Override
54            public void onViewAttachedToWindow(View v) {
55               setTextSizeH(text, sp);
56            }
57        });
58        return sp;
59    }
60
61    public void update() {
62        if (mTexts.isEmpty()) return;
63        mTexts.keyAt(0).post(mUpdateAll);
64    }
65
66    private void setTextSizeH(TextView text, int sp) {
67        text.setTextSize(TypedValue.COMPLEX_UNIT_SP, sp);
68    }
69
70    private final Runnable mUpdateAll = new Runnable() {
71        @Override
72        public void run() {
73            for (int i = 0; i < mTexts.size(); i++) {
74                setTextSizeH(mTexts.keyAt(i), mTexts.valueAt(i));
75            }
76        }
77    };
78}
79