AppCompatTextView.java revision 2cccf609662389d6a23dbc0711d5fb2e826e8c63 
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 android.support.v7.widget;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.support.v7.appcompat.R;
22import android.support.v7.internal.text.AllCapsTransformationMethod;
23import android.util.AttributeSet;
24import android.widget.TextView;
25
26/**
27 * A {@link android.widget.TextView} which supports compatible features on older version of the
28 * platform.
29 * <p>
30 * This will automatically be used when you use {@link android.widget.TextView} in your
31 * layouts. You should only need to manually use this class when writing custom views.
32 */
33public class AppCompatTextView extends TextView {
34
35    public AppCompatTextView(Context context) {
36        this(context, null);
37    }
38
39    public AppCompatTextView(Context context, AttributeSet attrs) {
40        this(context, attrs, 0);
41    }
42
43    public AppCompatTextView(Context context, AttributeSet attrs, int defStyle) {
44        super(context, attrs, defStyle);
45
46        // First read the TextAppearance style id
47        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppCompatTextView,
48                defStyle, 0);
49        final int ap = a.getResourceId(R.styleable.AppCompatTextView_android_textAppearance, -1);
50        a.recycle();
51
52        // Now check TextAppearance's textAllCaps value
53        if (ap != -1) {
54            TypedArray appearance = context.obtainStyledAttributes(ap, R.styleable.TextAppearance);
55            if (appearance.hasValue(R.styleable.TextAppearance_textAllCaps)) {
56                setAllCaps(appearance.getBoolean(R.styleable.TextAppearance_textAllCaps, false));
57            }
58            appearance.recycle();
59        }
60
61        // Now read the style's value
62        a = context.obtainStyledAttributes(attrs, R.styleable.AppCompatTextView, defStyle, 0);
63        if (a.hasValue(R.styleable.AppCompatTextView_textAllCaps)) {
64            setAllCaps(a.getBoolean(R.styleable.AppCompatTextView_textAllCaps, false));
65        }
66        a.recycle();
67    }
68
69    public void setAllCaps(boolean allCaps) {
70        setTransformationMethod(allCaps ? new AllCapsTransformationMethod(getContext()) : null);
71    }
72
73    @Override
74    public void setTextAppearance(Context context, int resId) {
75        super.setTextAppearance(context, resId);
76
77        TypedArray appearance = context.obtainStyledAttributes(resId, R.styleable.TextAppearance);
78        if (appearance.hasValue(R.styleable.TextAppearance_textAllCaps)) {
79            setAllCaps(appearance.getBoolean(R.styleable.TextAppearance_textAllCaps, false));
80        }
81        appearance.recycle();
82    }
83}
84