1/*
2 * Copyright (C) 2010 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.preference;
18
19import android.app.FragmentBreadCrumbs;
20import android.content.Context;
21import android.content.res.TypedArray;
22import android.util.AttributeSet;
23import android.view.View;
24import android.widget.FrameLayout;
25
26/**
27 * @hide
28 */
29public class PreferenceFrameLayout extends FrameLayout {
30    private static final int DEFAULT_BORDER_TOP = 0;
31    private static final int DEFAULT_BORDER_BOTTOM = 0;
32    private static final int DEFAULT_BORDER_LEFT = 0;
33    private static final int DEFAULT_BORDER_RIGHT = 0;
34    private final int mBorderTop;
35    private final int mBorderBottom;
36    private final int mBorderLeft;
37    private final int mBorderRight;
38    private boolean mPaddingApplied;
39
40    public PreferenceFrameLayout(Context context) {
41        this(context, null);
42    }
43
44    public PreferenceFrameLayout(Context context, AttributeSet attrs) {
45        this(context, attrs, com.android.internal.R.attr.preferenceFrameLayoutStyle);
46    }
47
48    public PreferenceFrameLayout(Context context, AttributeSet attrs, int defStyle) {
49        super(context, attrs, defStyle);
50        TypedArray a = context.obtainStyledAttributes(attrs,
51                com.android.internal.R.styleable.PreferenceFrameLayout, defStyle, 0);
52
53        float density = context.getResources().getDisplayMetrics().density;
54        int defaultBorderTop = (int) (density * DEFAULT_BORDER_TOP + 0.5f);
55        int defaultBottomPadding = (int) (density * DEFAULT_BORDER_BOTTOM + 0.5f);
56        int defaultLeftPadding = (int) (density * DEFAULT_BORDER_LEFT + 0.5f);
57        int defaultRightPadding = (int) (density * DEFAULT_BORDER_RIGHT + 0.5f);
58
59        mBorderTop = a.getDimensionPixelSize(
60                com.android.internal.R.styleable.PreferenceFrameLayout_borderTop,
61                defaultBorderTop);
62        mBorderBottom = a.getDimensionPixelSize(
63                com.android.internal.R.styleable.PreferenceFrameLayout_borderBottom,
64                defaultBottomPadding);
65        mBorderLeft = a.getDimensionPixelSize(
66                com.android.internal.R.styleable.PreferenceFrameLayout_borderLeft,
67                defaultLeftPadding);
68        mBorderRight = a.getDimensionPixelSize(
69                com.android.internal.R.styleable.PreferenceFrameLayout_borderRight,
70                defaultRightPadding);
71
72        a.recycle();
73    }
74
75    /**
76     * {@inheritDoc}
77     */
78    @Override
79    public LayoutParams generateLayoutParams(AttributeSet attrs) {
80        return new LayoutParams(getContext(), attrs);
81    }
82
83    @Override
84    public void addView(View child) {
85        int borderTop = getPaddingTop();
86        int borderBottom = getPaddingBottom();
87        int borderLeft = getPaddingLeft();
88        int borderRight = getPaddingRight();
89
90        android.view.ViewGroup.LayoutParams params = child.getLayoutParams();
91        LayoutParams layoutParams = params instanceof PreferenceFrameLayout.LayoutParams
92            ? (PreferenceFrameLayout.LayoutParams) child.getLayoutParams() : null;
93        // Check on the id of the child before adding it.
94        if (layoutParams != null && layoutParams.removeBorders) {
95            if (mPaddingApplied) {
96                borderTop -= mBorderTop;
97                borderBottom -= mBorderBottom;
98                borderLeft -= mBorderLeft;
99                borderRight -= mBorderRight;
100                mPaddingApplied = false;
101            }
102        } else {
103            // Add the padding to the view group after determining if the
104            // padding already exists.
105            if (!mPaddingApplied) {
106                borderTop += mBorderTop;
107                borderBottom += mBorderBottom;
108                borderLeft += mBorderLeft;
109                borderRight += mBorderRight;
110                mPaddingApplied = true;
111            }
112        }
113
114        int previousTop = getPaddingTop();
115        int previousBottom = getPaddingBottom();
116        int previousLeft = getPaddingLeft();
117        int previousRight = getPaddingRight();
118        if (previousTop != borderTop || previousBottom != borderBottom
119                || previousLeft != borderLeft || previousRight != borderRight) {
120            setPadding(borderLeft, borderTop, borderRight, borderBottom);
121        }
122
123        super.addView(child);
124    }
125
126    public static class LayoutParams extends FrameLayout.LayoutParams {
127        public boolean removeBorders = false;
128        /**
129         * {@inheritDoc}
130         */
131        public LayoutParams(Context c, AttributeSet attrs) {
132            super(c, attrs);
133
134            TypedArray a = c.obtainStyledAttributes(attrs,
135                    com.android.internal.R.styleable.PreferenceFrameLayout_Layout);
136            removeBorders = a.getBoolean(
137                    com.android.internal.R.styleable.PreferenceFrameLayout_Layout_layout_removeBorders,
138                    false);
139            a.recycle();
140        }
141
142        /**
143         * {@inheritDoc}
144         */
145        public LayoutParams(int width, int height) {
146            super(width, height);
147        }
148    }
149}