1/*
2 * Copyright (C) 2013 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.app;
18
19import android.content.Context;
20import android.content.pm.ActivityInfo;
21import android.content.pm.PackageManager;
22import android.content.res.Configuration;
23import android.content.res.TypedArray;
24import android.os.Build;
25import android.os.Bundle;
26import android.support.v4.app.ActionBarDrawerToggle;
27import android.support.v7.appcompat.R;
28import android.support.v7.internal.view.SupportMenuInflater;
29import android.support.v7.view.ActionMode;
30import android.util.Log;
31import android.view.Menu;
32import android.view.MenuInflater;
33import android.view.MenuItem;
34import android.view.View;
35import android.view.ViewGroup;
36
37abstract class ActionBarActivityDelegate {
38
39    static final String METADATA_UI_OPTIONS = "android.support.UI_OPTIONS";
40    static final String UIOPTION_SPLIT_ACTION_BAR_WHEN_NARROW = "splitActionBarWhenNarrow";
41
42    private static final String TAG = "ActionBarActivityDelegate";
43
44    static ActionBarActivityDelegate createDelegate(ActionBarActivity activity) {
45        final int version = Build.VERSION.SDK_INT;
46        if (version >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
47            return new ActionBarActivityDelegateICS(activity);
48        } else if (version >= Build.VERSION_CODES.HONEYCOMB) {
49            return new ActionBarActivityDelegateHC(activity);
50        } else {
51            return new ActionBarActivityDelegateBase(activity);
52        }
53    }
54
55    final ActionBarActivity mActivity;
56
57    private ActionBar mActionBar;
58    private MenuInflater mMenuInflater;
59
60    // true if this activity has an action bar.
61    boolean mHasActionBar;
62    // true if this activity's action bar overlays other activity content.
63    boolean mOverlayActionBar;
64
65    ActionBarActivityDelegate(ActionBarActivity activity) {
66        mActivity = activity;
67    }
68
69    abstract ActionBar createSupportActionBar();
70
71    final ActionBar getSupportActionBar() {
72        // The Action Bar should be lazily created as mHasActionBar or mOverlayActionBar
73        // could change after onCreate
74        if (mHasActionBar || mOverlayActionBar) {
75            if (mActionBar == null) {
76                mActionBar = createSupportActionBar();
77            }
78        } else {
79            // If we're not set to have a Action Bar, null it just in case it's been set
80            mActionBar = null;
81        }
82        return mActionBar;
83    }
84
85    MenuInflater getMenuInflater() {
86        if (mMenuInflater == null) {
87            ActionBar ab = getSupportActionBar();
88            if (ab != null) {
89                mMenuInflater = new SupportMenuInflater(ab.getThemedContext());
90            } else {
91                mMenuInflater = new SupportMenuInflater(mActivity);
92            }
93        }
94        return mMenuInflater;
95    }
96
97    void onCreate(Bundle savedInstanceState) {
98        TypedArray a = mActivity.obtainStyledAttributes(R.styleable.ActionBarWindow);
99
100        if (!a.hasValue(R.styleable.ActionBarWindow_windowActionBar)) {
101            a.recycle();
102            throw new IllegalStateException(
103                    "You need to use a Theme.AppCompat theme (or descendant) with this activity.");
104        }
105
106        mHasActionBar = a.getBoolean(R.styleable.ActionBarWindow_windowActionBar, false);
107        mOverlayActionBar = a.getBoolean(R.styleable.ActionBarWindow_windowActionBarOverlay, false);
108        a.recycle();
109    }
110
111    abstract void onConfigurationChanged(Configuration newConfig);
112
113    abstract void onStop();
114
115    abstract void onPostResume();
116
117    abstract void setContentView(View v);
118
119    abstract void setContentView(int resId);
120
121    abstract void setContentView(View v, ViewGroup.LayoutParams lp);
122
123    abstract void addContentView(View v, ViewGroup.LayoutParams lp);
124
125    abstract void onTitleChanged(CharSequence title);
126
127    abstract void supportInvalidateOptionsMenu();
128
129    abstract boolean supportRequestWindowFeature(int featureId);
130
131    // Methods used to create and respond to options menu
132    abstract View onCreatePanelView(int featureId);
133
134    abstract boolean onPreparePanel(int featureId, View view, Menu menu);
135
136    abstract boolean onCreatePanelMenu(int featureId, Menu menu);
137
138    abstract boolean onMenuItemSelected(int featureId, MenuItem item);
139
140    abstract boolean onBackPressed();
141
142    abstract ActionMode startSupportActionMode(ActionMode.Callback callback);
143
144    abstract void setSupportProgressBarVisibility(boolean visible);
145
146    abstract void setSupportProgressBarIndeterminateVisibility(boolean visible);
147
148    abstract void setSupportProgressBarIndeterminate(boolean indeterminate);
149
150    abstract void setSupportProgress(int progress);
151
152    abstract ActionBarDrawerToggle.Delegate getDrawerToggleDelegate();
153
154    protected final String getUiOptionsFromMetadata() {
155        try {
156            PackageManager pm = mActivity.getPackageManager();
157            ActivityInfo info = pm.getActivityInfo(mActivity.getComponentName(),
158                    PackageManager.GET_META_DATA);
159
160            String uiOptions = null;
161            if (info.metaData != null) {
162                uiOptions = info.metaData.getString(METADATA_UI_OPTIONS);
163            }
164            return uiOptions;
165        } catch (PackageManager.NameNotFoundException e) {
166            Log.e(TAG, "getUiOptionsFromMetadata: Activity '" + mActivity.getClass()
167                    .getSimpleName() + "' not in manifest");
168            return null;
169        }
170    }
171
172    protected final Context getActionBarThemedContext() {
173        Context context = mActivity;
174
175        // If we have an action bar, initialize the menu with a context themed from it.
176        ActionBar ab = getSupportActionBar();
177        if (ab != null) {
178            context = ab.getThemedContext();
179        }
180        return context;
181    }
182}
183