1/*
2 * Copyright (C) 2015 Google Inc.
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.text.Layout;
23import android.util.AttributeSet;
24import android.util.TypedValue;
25import android.widget.TextView;
26
27/**
28 * Used by dialogs to change the font size and number of lines to try to fit
29 * the text to the available space.
30 *
31 * @hide
32 */
33public class DialogTitle extends TextView {
34
35    public DialogTitle(Context context, AttributeSet attrs, int defStyleAttr) {
36        super(context, attrs, defStyleAttr);
37    }
38
39    public DialogTitle(Context context, AttributeSet attrs) {
40        super(context, attrs);
41    }
42
43    public DialogTitle(Context context) {
44        super(context);
45    }
46
47    @Override
48    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
49        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
50
51        final Layout layout = getLayout();
52        if (layout != null) {
53            final int lineCount = layout.getLineCount();
54            if (lineCount > 0) {
55                final int ellipsisCount = layout.getEllipsisCount(lineCount - 1);
56                if (ellipsisCount > 0) {
57                    setSingleLine(false);
58                    setMaxLines(2);
59
60                    final TypedArray a = getContext().obtainStyledAttributes(null,
61                            R.styleable.TextAppearance,
62                            android.R.attr.textAppearanceMedium,
63                            android.R.style.TextAppearance_Medium);
64                    final int textSize = a.getDimensionPixelSize(
65                            R.styleable.TextAppearance_android_textSize, 0);
66                    if (textSize != 0) {
67                        // textSize is already expressed in pixels
68                        setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
69                    }
70                    a.recycle();
71
72                    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
73                }
74            }
75        }
76    }
77}