1/*
2 * Copyright (C) 2012 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.internal.widget;
18
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.graphics.Rect;
22import android.support.v7.app.ActionBar;
23import android.support.v7.appcompat.R;
24import android.util.AttributeSet;
25import android.view.View;
26import android.widget.FrameLayout;
27
28/**
29 * Special layout for the containing of an overlay action bar (and its content) to correctly handle
30 * fitting system windows when the content has request that its layout ignore them.
31 *
32 * @hide
33 */
34public class ActionBarOverlayLayout extends FrameLayout {
35
36    private int mActionBarHeight;
37    private ActionBar mActionBar;
38    private View mContent;
39    private View mActionBarTop;
40    private ActionBarContainer mContainerView;
41    private ActionBarView mActionView;
42    private View mActionBarBottom;
43    private final Rect mZeroRect = new Rect(0, 0, 0, 0);
44
45    static final int[] mActionBarSizeAttr = new int[]{
46            R.attr.actionBarSize
47    };
48
49    public ActionBarOverlayLayout(Context context) {
50        super(context);
51        init(context);
52    }
53
54    public ActionBarOverlayLayout(Context context, AttributeSet attrs) {
55        super(context, attrs);
56        init(context);
57    }
58
59    private void init(Context context) {
60        TypedArray ta = getContext().getTheme().obtainStyledAttributes(mActionBarSizeAttr);
61        mActionBarHeight = ta.getDimensionPixelSize(0, 0);
62        ta.recycle();
63    }
64
65    public void setActionBar(ActionBar impl) {
66        mActionBar = impl;
67    }
68
69    private boolean applyInsets(View view, Rect insets, boolean left, boolean top,
70            boolean bottom, boolean right) {
71        boolean changed = false;
72        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) view.getLayoutParams();
73        if (left && lp.leftMargin != insets.left) {
74            changed = true;
75            lp.leftMargin = insets.left;
76        }
77        if (top && lp.topMargin != insets.top) {
78            changed = true;
79            lp.topMargin = insets.top;
80        }
81        if (right && lp.rightMargin != insets.right) {
82            changed = true;
83            lp.rightMargin = insets.right;
84        }
85        if (bottom && lp.bottomMargin != insets.bottom) {
86            changed = true;
87            lp.bottomMargin = insets.bottom;
88        }
89        return changed;
90    }
91
92    void pullChildren() {
93        if (mContent == null) {
94            mContent = findViewById(R.id.action_bar_activity_content);
95            if (mContent == null) {
96                mContent = findViewById(android.R.id.content);
97            }
98            mActionBarTop = findViewById(R.id.top_action_bar);
99            mContainerView = (ActionBarContainer) findViewById(R.id.action_bar_container);
100            mActionView = (ActionBarView) findViewById(R.id.action_bar);
101            mActionBarBottom = findViewById(R.id.split_action_bar);
102        }
103    }
104}
105