/*
Copyright © 2013-2014, Silent Circle, LLC.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Any redistribution, use, or modification is done solely for personal
benefit and not for any commercial purpose or for monetary gain
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name Silent Circle nor the names of its contributors may
be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL SILENT CIRCLE, LLC BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This implementation is edited version of original Android sources.
*/
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.silentcircle.contacts.quickcontact;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
// import com.android.contacts.util.PhoneCapabilityTester;
import com.google.common.collect.Sets;
import java.lang.ref.SoftReference;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
/**
* Internally hold a cache of scaled icons based on {@link PackageManager}
* queries, keyed internally on MIME-type.
*/
public class ResolveCache {
/**
* Specific list {@link ApplicationInfo#packageName} of apps that are
* prefered <strong>only</strong> for the purposes of default icons when
* multiple {@link ResolveInfo} are found to match. This only happens when
* the user has not selected a default app yet, and they will still be
* presented with the system disambiguation dialog.
* If several of this list match (e.g. Android Browser vs. Chrome), we will pick either one
*/
private static final HashSet<String> sPreferResolve = Sets.newHashSet(
"com.android.email",
"com.google.android.email",
"com.android.phone",
"com.google.android.apps.maps",
"com.android.chrome",
"com.google.android.browser",
"com.android.browser");
private final Context mContext;
private final PackageManager mPackageManager;
private static ResolveCache sInstance;
/**
* Returns an instance of the ResolveCache. Only one internal instance is kept, so
* the argument packageManagers is ignored for all but the first call
*/
public synchronized static ResolveCache getInstance(Context context) {
if (sInstance == null) {
final Context applicationContext = context.getApplicationContext();
sInstance = new ResolveCache(applicationContext);
// Register for package-changes so that we can flush our cache
final IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
filter.addDataScheme("package");
applicationContext.registerReceiver(sInstance.mPackageIntentReceiver, filter);
}
return sInstance;
}
private synchronized static void flush() {
sInstance = null;
}
/**
* Called anytime a package is installed, uninstalled etc, so that we can wipe our cache
*/
private BroadcastReceiver mPackageIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
flush();
}
};
/**
* Cached entry holding the best {@link ResolveInfo} for a specific
* MIME-type, along with a {@link SoftReference} to its icon.
*/
private static class Entry {
public ResolveInfo bestResolve;
public Drawable icon;
}
private HashMap<String, Entry> mCache = new HashMap<String, Entry>();
private ResolveCache(Context context) {
mContext = context;
mPackageManager = context.getPackageManager();
}
/**
* Get the {@link Entry} best associated with the given {@link Action},
* or create and populate a new one if it doesn't exist.
*/
protected Entry getEntry(Action action) {
final String mimeType = action.getMimeType();
Entry entry = mCache.get(mimeType);
if (entry != null)
return entry;
entry = new Entry();
Intent intent = action.getIntent();
// if (SipAddress.CONTENT_ITEM_TYPE.equals(mimeType)
// && !PhoneCapabilityTester.isSipPhone(mContext)) {
// intent = null;
// }
if (intent != null) {
final List<ResolveInfo> matches = mPackageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
// Pick first match, otherwise best found
ResolveInfo bestResolve = null;
final int size = matches.size();
if (size == 1) {
bestResolve = matches.get(0);
}
else if (size > 1) {
bestResolve = getBestResolve(intent, matches);
}
if (bestResolve != null) {
final Drawable icon = bestResolve.loadIcon(mPackageManager);
entry.bestResolve = bestResolve;
entry.icon = icon;
}
}
mCache.put(mimeType, entry);
return entry;
}
/**
* Best {@link ResolveInfo} when multiple found. Ties are broken by
* selecting first from the {@link QuickContactActivity#sPreferResolve} list of
* preferred packages, second by apps that live on the system partition,
* otherwise the app from the top of the list. This is
* <strong>only</strong> used for selecting a default icon for
* displaying in the track, and does not shortcut the system
* {@link Intent} disambiguation dialog.
*/
protected ResolveInfo getBestResolve(Intent intent, List<ResolveInfo> matches) {
// Try finding preferred activity, otherwise detect disambig
final ResolveInfo foundResolve = mPackageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
final boolean foundDisambig = (foundResolve.match & IntentFilter.MATCH_CATEGORY_MASK) == 0;
if (!foundDisambig) {
// Found concrete match, so return directly
return foundResolve;
}
// Accept any package from prefer list, otherwise first system app
ResolveInfo firstSystem = null;
for (ResolveInfo info : matches) {
final boolean isSystem = (info.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
final boolean isPrefer = sPreferResolve.contains(info.activityInfo.applicationInfo.packageName);
if (isPrefer)
return info;
if (isSystem && firstSystem == null)
firstSystem = info;
}
// Return first system found, otherwise first from list
return firstSystem != null ? firstSystem : matches.get(0);
}
/**
* Check {@link PackageManager} to see if any apps offer to handle the
* given {@link Action}.
*/
public boolean hasResolve(Action action) {
return getEntry(action).bestResolve != null;
}
/**
* Find the best description for the given {@link Action}, usually used
* for accessibility purposes.
*/
public CharSequence getDescription(Action action) {
final CharSequence actionSubtitle = action.getSubtitle();
final ResolveInfo info = getEntry(action).bestResolve;
if (info != null) {
return info.loadLabel(mPackageManager);
}
else if (!TextUtils.isEmpty(actionSubtitle)) {
return actionSubtitle;
}
else {
return null;
}
}
/**
* Return the best icon for the given {@link Action}, which is usually
* based on the {@link ResolveInfo} found through a
* {@link PackageManager} query.
*/
public Drawable getIcon(Action action) {
return getEntry(action).icon;
}
public void clear() {
mCache.clear();
}
}