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/*
* Copyright (C) 2015 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.android.settings.wifi;
import android.content.Context;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.net.wifi.WifiConfiguration;
import android.os.Looper;
import android.os.UserHandle;
import android.preference.Preference;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.view.View;
import android.widget.TextView;
import com.android.settings.R;
import com.android.settingslib.wifi.AccessPoint;
public class AccessPointPreference extends Preference {
private static final int[] STATE_SECURED = {
R.attr.state_encrypted
};
private static final int[] STATE_NONE = {};
private static int[] wifi_signal_attributes = { R.attr.wifi_signal };
private static int[] wifi_no_signal_attributes = { R.attr.wifi_no_signal };
private final StateListDrawable mWifiSld;
private final int mBadgePadding;
private final UserBadgeCache mBadgeCache;
private TextView mTitleView;
private boolean mForSavedNetworks = false;
private AccessPoint mAccessPoint;
private Drawable mBadge;
private int mLevel;
private CharSequence mContentDescription;
private boolean mShowNoSignalIcon;
private boolean mNoSignalLoaded;
static final int[] WIFI_CONNECTION_STRENGTH = {
R.string.accessibility_wifi_one_bar,
R.string.accessibility_wifi_two_bars,
R.string.accessibility_wifi_three_bars,
R.string.accessibility_wifi_signal_full
};
// Used for dummy pref.
public AccessPointPreference(Context context, AttributeSet attrs) {
super(context, attrs);
mWifiSld = null;
mBadgePadding = 0;
mBadgeCache = null;
}
public AccessPointPreference(AccessPoint accessPoint, Context context, UserBadgeCache cache,
boolean forSavedNetworks, boolean showNoSignal) {
super(context);
mBadgeCache = cache;
mAccessPoint = accessPoint;
mForSavedNetworks = forSavedNetworks;
mAccessPoint.setTag(this);
mLevel = -1;
mWifiSld = (StateListDrawable) context.getTheme()
.obtainStyledAttributes(wifi_signal_attributes).getDrawable(0);
// Distance from the end of the title at which this AP's user badge should sit.
mBadgePadding = context.getResources()
.getDimensionPixelSize(R.dimen.wifi_preference_badge_padding);
mShowNoSignalIcon = showNoSignal;
refresh();
}
public AccessPoint getAccessPoint() {
return mAccessPoint;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
if (mAccessPoint == null) {
// Used for dummy pref.
return;
}
Drawable drawable = getIcon();
if (drawable != null) {
drawable.setLevel(mLevel);
}
mTitleView = (TextView) view.findViewById(com.android.internal.R.id.title);
if (mTitleView != null) {
// Attach to the end of the title view
mTitleView.setCompoundDrawablesRelativeWithIntrinsicBounds(null, null, mBadge, null);
mTitleView.setCompoundDrawablePadding(mBadgePadding);
}
view.setContentDescription(mContentDescription);
}
protected void updateIcon(int level, Context context) {
if (level == -1) {
if (mShowNoSignalIcon) {
Drawable drawable = getIcon();
if (drawable == null || !mNoSignalLoaded) {
StateListDrawable sld = (StateListDrawable) context.getTheme()
.obtainStyledAttributes(wifi_no_signal_attributes).getDrawable(0);
if (sld != null) {
sld.setState((getAccessPoint().getSecurity() != AccessPoint.SECURITY_NONE)
? STATE_SECURED : STATE_NONE);
setIcon(sld.getCurrent());
mNoSignalLoaded = true;
}
}
}
if (!mNoSignalLoaded) {
setIcon(null);
}
} else {
if (getIcon() == null || mNoSignalLoaded) {
// To avoid a drawing race condition, we first set the state (SECURE/NONE) and then
// set the icon (drawable) to that state's drawable.
// If sld is null then we are indexing and therefore do not have access to
// (nor need to display) the drawable.
if (mWifiSld != null) {
mWifiSld.setState((mAccessPoint.getSecurity() != AccessPoint.SECURITY_NONE)
? STATE_SECURED
: STATE_NONE);
Drawable drawable = mWifiSld.getCurrent();
if (!mForSavedNetworks || mShowNoSignalIcon) {
setIcon(drawable);
} else {
setIcon(null);
}
}
}
}
}
protected void updateBadge(Context context) {
WifiConfiguration config = mAccessPoint.getConfig();
if (config != null) {
// Fetch badge (may be null)
// Get the badge using a cache since the PM will ask the UserManager for the list
// of profiles every time otherwise.
mBadge = mBadgeCache.getUserBadge(config.creatorUid);
}
}
/**
* Updates the title and summary; may indirectly call notifyChanged().
*/
public void refresh() {
if (mForSavedNetworks) {
setTitle(mAccessPoint.getConfigName());
} else {
setTitle(mAccessPoint.getSsid());
}
final Context context = getContext();
int level = mAccessPoint.getLevel();
if (level != mLevel || mShowNoSignalIcon) {
mLevel = level;
updateIcon(mLevel, context);
notifyChanged();
}
updateBadge(context);
setSummary(mForSavedNetworks ? mAccessPoint.getSavedNetworkSummary()
: mAccessPoint.getSettingsSummary());
mContentDescription = getTitle();
if (getSummary() != null) {
mContentDescription = TextUtils.concat(mContentDescription, ",", getSummary());
}
if (level >= 0 && level < WIFI_CONNECTION_STRENGTH.length) {
mContentDescription = TextUtils.concat(mContentDescription, ",",
getContext().getString(WIFI_CONNECTION_STRENGTH[level]));
}
}
@Override
protected void notifyChanged() {
if (Looper.getMainLooper() != Looper.myLooper()) {
// Let our BG thread callbacks call setTitle/setSummary.
postNotifyChanged();
} else {
super.notifyChanged();
}
}
public void onLevelChanged() {
postNotifyChanged();
}
private void postNotifyChanged() {
if (mTitleView != null) {
mTitleView.post(mNotifyChanged);
} // Otherwise we haven't been bound yet, and don't need to update.
}
private final Runnable mNotifyChanged = new Runnable() {
@Override
public void run() {
notifyChanged();
}
};
public static class UserBadgeCache {
private final SparseArray<Drawable> mBadges = new SparseArray<>();
private final PackageManager mPm;
UserBadgeCache(PackageManager pm) {
mPm = pm;
}
private Drawable getUserBadge(int userId) {
int index = mBadges.indexOfKey(userId);
if (index < 0) {
Drawable badge = mPm.getUserBadgeForDensity(new UserHandle(userId), 0 /* dpi */);
mBadges.put(userId, badge);
return badge;
}
return mBadges.valueAt(index);
}
}
}
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