1/*
2 * Copyright (C) 2014 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 com.android.systemui.statusbar.policy;
18
19import android.content.ComponentName;
20import android.content.Context;
21import android.content.Intent;
22import android.content.pm.ActivityInfo;
23import android.content.pm.PackageManager;
24import android.content.pm.ResolveInfo;
25import android.os.Bundle;
26import android.util.Log;
27import android.view.LayoutInflater;
28import android.view.View;
29
30import com.android.internal.widget.LockPatternUtils;
31import com.android.keyguard.KeyguardUpdateMonitor;
32import com.android.systemui.statusbar.phone.KeyguardPreviewContainer;
33
34import java.util.List;
35
36/**
37 * Utility class to inflate previews for phone and camera affordance.
38 */
39public class PreviewInflater {
40
41    private static final String TAG = "PreviewInflater";
42
43    private static final String META_DATA_KEYGUARD_LAYOUT = "com.android.keyguard.layout";
44
45    private Context mContext;
46    private LockPatternUtils mLockPatternUtils;
47
48    public PreviewInflater(Context context, LockPatternUtils lockPatternUtils) {
49        mContext = context;
50        mLockPatternUtils = lockPatternUtils;
51    }
52
53    public View inflatePreview(Intent intent) {
54        WidgetInfo info = getWidgetInfo(intent);
55        return inflatePreview(info);
56    }
57
58    public View inflatePreviewFromService(ComponentName componentName) {
59        WidgetInfo info = getWidgetInfoFromService(componentName);
60        return inflatePreview(info);
61    }
62
63    private KeyguardPreviewContainer inflatePreview(WidgetInfo info) {
64        if (info == null) {
65            return null;
66        }
67        View v = inflateWidgetView(info);
68        if (v == null) {
69            return null;
70        }
71        KeyguardPreviewContainer container = new KeyguardPreviewContainer(mContext, null);
72        container.addView(v);
73        return container;
74    }
75
76    private View inflateWidgetView(WidgetInfo widgetInfo) {
77        View widgetView = null;
78        try {
79            Context appContext = mContext.createPackageContext(
80                    widgetInfo.contextPackage, Context.CONTEXT_RESTRICTED);
81            LayoutInflater appInflater = (LayoutInflater)
82                    appContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
83            appInflater = appInflater.cloneInContext(appContext);
84            widgetView = appInflater.inflate(widgetInfo.layoutId, null, false);
85        } catch (PackageManager.NameNotFoundException|RuntimeException e) {
86            Log.w(TAG, "Error creating widget view", e);
87        }
88        return widgetView;
89    }
90
91    private WidgetInfo getWidgetInfoFromService(ComponentName componentName) {
92        PackageManager packageManager = mContext.getPackageManager();
93        // Look for the preview specified in the service meta-data
94        try {
95            Bundle metaData = packageManager.getServiceInfo(
96                    componentName, PackageManager.GET_META_DATA).metaData;
97            return getWidgetInfoFromMetaData(componentName.getPackageName(), metaData);
98        } catch (PackageManager.NameNotFoundException e) {
99            Log.w(TAG, "Failed to load preview; " + componentName.flattenToShortString()
100                    + " not found", e);
101        }
102        return null;
103    }
104
105    private WidgetInfo getWidgetInfoFromMetaData(String contextPackage,
106            Bundle metaData) {
107        if (metaData == null) {
108            return null;
109        }
110        int layoutId = metaData.getInt(META_DATA_KEYGUARD_LAYOUT);
111        if (layoutId == 0) {
112            return null;
113        }
114        WidgetInfo info = new WidgetInfo();
115        info.contextPackage = contextPackage;
116        info.layoutId = layoutId;
117        return info;
118    }
119
120    private WidgetInfo getWidgetInfo(Intent intent) {
121        PackageManager packageManager = mContext.getPackageManager();
122        int flags = PackageManager.MATCH_DEFAULT_ONLY
123                | PackageManager.MATCH_DIRECT_BOOT_AWARE
124                | PackageManager.MATCH_DIRECT_BOOT_UNAWARE;
125        final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
126                intent, flags, KeyguardUpdateMonitor.getCurrentUser());
127        if (appList.size() == 0) {
128            return null;
129        }
130        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
131                flags | PackageManager.GET_META_DATA,
132                KeyguardUpdateMonitor.getCurrentUser());
133        if (wouldLaunchResolverActivity(resolved, appList)) {
134            return null;
135        }
136        if (resolved == null || resolved.activityInfo == null) {
137            return null;
138        }
139        return getWidgetInfoFromMetaData(resolved.activityInfo.packageName,
140                resolved.activityInfo.metaData);
141    }
142
143    public static boolean wouldLaunchResolverActivity(Context ctx, Intent intent,
144            int currentUserId) {
145        return getTargetActivityInfo(ctx, intent, currentUserId, false /* onlyDirectBootAware */)
146                == null;
147    }
148
149    /**
150     * @param onlyDirectBootAware a boolean indicating whether the matched activity packages must
151     *                            be direct boot aware when in direct boot mode if false, all
152     *                            packages are considered a match even if they are not aware.
153     * @return the target activity info of the intent it resolves to a specific package or
154     *         {@code null} if it resolved to the resolver activity
155     */
156    public static ActivityInfo getTargetActivityInfo(Context ctx, Intent intent,
157            int currentUserId, boolean onlyDirectBootAware) {
158        PackageManager packageManager = ctx.getPackageManager();
159        int flags = PackageManager.MATCH_DEFAULT_ONLY;
160        if (!onlyDirectBootAware) {
161            flags |=  PackageManager.MATCH_DIRECT_BOOT_AWARE
162                    | PackageManager.MATCH_DIRECT_BOOT_UNAWARE;
163        }
164        final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
165                intent, flags, currentUserId);
166        if (appList.size() == 0) {
167            return null;
168        }
169        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
170                flags | PackageManager.GET_META_DATA, currentUserId);
171        if (resolved == null || wouldLaunchResolverActivity(resolved, appList)) {
172            return null;
173        } else {
174            return resolved.activityInfo;
175        }
176    }
177
178    private static boolean wouldLaunchResolverActivity(
179            ResolveInfo resolved, List<ResolveInfo> appList) {
180        // If the list contains the above resolved activity, then it can't be
181        // ResolverActivity itself.
182        for (int i = 0; i < appList.size(); i++) {
183            ResolveInfo tmp = appList.get(i);
184            if (tmp.activityInfo.name.equals(resolved.activityInfo.name)
185                    && tmp.activityInfo.packageName.equals(resolved.activityInfo.packageName)) {
186                return false;
187            }
188        }
189        return true;
190    }
191
192    private static class WidgetInfo {
193        String contextPackage;
194        int layoutId;
195    }
196}
197