1 /*
2  * Copyright (C) 2008 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 
17 package com.android.internal.widget;
18 
19 import android.compat.annotation.UnsupportedAppUsage;
20 import android.content.Context;
21 import android.content.res.TypedArray;
22 import android.text.Layout;
23 import android.util.AttributeSet;
24 import android.util.TypedValue;
25 import 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 public class DialogTitle extends TextView {
32 
DialogTitle(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)33     public DialogTitle(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
34         super(context, attrs, defStyleAttr, defStyleRes);
35     }
36 
DialogTitle(Context context, AttributeSet attrs, int defStyleAttr)37     public DialogTitle(Context context, AttributeSet attrs, int defStyleAttr) {
38         super(context, attrs, defStyleAttr);
39     }
40 
41     @UnsupportedAppUsage
DialogTitle(Context context, AttributeSet attrs)42     public DialogTitle(Context context, AttributeSet attrs) {
43         super(context, attrs);
44     }
45 
DialogTitle(Context context)46     public DialogTitle(Context context) {
47         super(context);
48     }
49 
50     @Override
onMeasure(int widthMeasureSpec, int heightMeasureSpec)51     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
52         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
53 
54         final Layout layout = getLayout();
55         if (layout != null) {
56             final int lineCount = layout.getLineCount();
57             if (lineCount > 0) {
58                 final int ellipsisCount = layout.getEllipsisCount(lineCount - 1);
59                 if (ellipsisCount > 0) {
60                     setSingleLine(false);
61                     setMaxLines(2);
62 
63                     final TypedArray a = mContext.obtainStyledAttributes(null,
64                             android.R.styleable.TextAppearance, android.R.attr.textAppearanceMedium,
65                             android.R.style.TextAppearance_Medium);
66                     final int textSize = a.getDimensionPixelSize(
67                             android.R.styleable.TextAppearance_textSize, 0);
68                     if (textSize != 0) {
69                         // textSize is already expressed in pixels
70                         setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
71                     }
72                     a.recycle();
73 
74                     super.onMeasure(widthMeasureSpec, heightMeasureSpec);
75                 }
76             }
77         }
78     }
79 }
80