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.view;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.content.res.TypedArray;
22import android.os.Build;
23import android.support.v7.appcompat.R;
24
25/**
26 * Allows components to query for various configuration policy decisions about how the action bar
27 * should lay out and behave on the current device.
28 *
29 * @hide
30 */
31public class ActionBarPolicy {
32
33    private Context mContext;
34
35    public static ActionBarPolicy get(Context context) {
36        return new ActionBarPolicy(context);
37    }
38
39    private ActionBarPolicy(Context context) {
40        mContext = context;
41    }
42
43    public int getMaxActionButtons() {
44        return mContext.getResources().getInteger(R.integer.abc_max_action_buttons);
45    }
46
47    public boolean showsOverflowMenuButton() {
48        // Only show overflow on HC+ devices
49        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
50    }
51
52    public int getEmbeddedMenuWidthLimit() {
53        return mContext.getResources().getDisplayMetrics().widthPixels / 2;
54    }
55
56    public boolean hasEmbeddedTabs() {
57        // The embedded tabs policy changed in Jellybean; give older apps the old policy
58        // so they get what they expect.
59        return mContext.getResources().getBoolean(R.bool.abc_action_bar_embed_tabs_pre_jb);
60    }
61
62    public int getTabContainerHeight() {
63        TypedArray a = mContext.obtainStyledAttributes(null, R.styleable.ActionBar,
64                R.attr.actionBarStyle, 0);
65        int height = a.getLayoutDimension(R.styleable.ActionBar_height, 0);
66        Resources r = mContext.getResources();
67        if (!hasEmbeddedTabs()) {
68            // Stacked tabs; limit the height
69            height = Math.min(height,
70                    r.getDimensionPixelSize(R.dimen.abc_action_bar_stacked_max_height));
71        }
72        a.recycle();
73        return height;
74    }
75
76    public boolean enableHomeButtonByDefault() {
77        // Older apps get the home button interaction enabled by default.
78        // Newer apps need to enable it explicitly.
79        return mContext.getApplicationInfo().targetSdkVersion < 14; // ICE_CREAM_SANDWICH
80    }
81
82    public int getStackedTabMaxWidth() {
83        return mContext.getResources().getDimensionPixelSize(
84                R.dimen.abc_action_bar_stacked_tab_max_width);
85    }
86}
87