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/*
* Copyright (C) 2017 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.settingslib.development;
import android.content.Context;
import android.content.Intent;
import android.os.SystemProperties;
import android.support.annotation.VisibleForTesting;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.preference.ListPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;
import com.android.settingslib.R;
public abstract class AbstractLogdSizePreferenceController extends
DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
public static final String ACTION_LOGD_SIZE_UPDATED = "com.android.settingslib.development."
+ "AbstractLogdSizePreferenceController.LOGD_SIZE_UPDATED";
public static final String EXTRA_CURRENT_LOGD_VALUE = "CURRENT_LOGD_VALUE";
@VisibleForTesting
static final String LOW_RAM_CONFIG_PROPERTY_KEY = "ro.config.low_ram";
private static final String SELECT_LOGD_SIZE_KEY = "select_logd_size";
@VisibleForTesting
static final String SELECT_LOGD_SIZE_PROPERTY = "persist.logd.size";
static final String SELECT_LOGD_TAG_PROPERTY = "persist.log.tag";
// Tricky, isLoggable only checks for first character, assumes silence
static final String SELECT_LOGD_TAG_SILENCE = "Settings";
@VisibleForTesting
static final String SELECT_LOGD_SNET_TAG_PROPERTY = "persist.log.tag.snet_event_log";
private static final String SELECT_LOGD_RUNTIME_SNET_TAG_PROPERTY = "log.tag.snet_event_log";
private static final String SELECT_LOGD_DEFAULT_SIZE_PROPERTY = "ro.logd.size";
@VisibleForTesting
static final String SELECT_LOGD_DEFAULT_SIZE_VALUE = "262144";
private static final String SELECT_LOGD_SVELTE_DEFAULT_SIZE_VALUE = "65536";
// 32768 is merely a menu marker, 64K is our lowest log buffer size we replace it with.
@VisibleForTesting
static final String SELECT_LOGD_MINIMUM_SIZE_VALUE = "65536";
static final String SELECT_LOGD_OFF_SIZE_MARKER_VALUE = "32768";
@VisibleForTesting
static final String DEFAULT_SNET_TAG = "I";
private ListPreference mLogdSize;
public AbstractLogdSizePreferenceController(Context context) {
super(context);
}
@Override
public String getPreferenceKey() {
return SELECT_LOGD_SIZE_KEY;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
if (isAvailable()) {
mLogdSize = (ListPreference) screen.findPreference(SELECT_LOGD_SIZE_KEY);
}
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (preference == mLogdSize) {
writeLogdSizeOption(newValue);
return true;
} else {
return false;
}
}
public void enablePreference(boolean enabled) {
if (isAvailable()) {
mLogdSize.setEnabled(enabled);
}
}
private String defaultLogdSizeValue() {
String defaultValue = SystemProperties.get(SELECT_LOGD_DEFAULT_SIZE_PROPERTY);
if ((defaultValue == null) || (defaultValue.length() == 0)) {
if (SystemProperties.get("ro.config.low_ram").equals("true")) {
defaultValue = SELECT_LOGD_SVELTE_DEFAULT_SIZE_VALUE;
} else {
defaultValue = SELECT_LOGD_DEFAULT_SIZE_VALUE;
}
}
return defaultValue;
}
public void updateLogdSizeValues() {
if (mLogdSize != null) {
String currentTag = SystemProperties.get(SELECT_LOGD_TAG_PROPERTY);
String currentValue = SystemProperties.get(SELECT_LOGD_SIZE_PROPERTY);
if ((currentTag != null) && currentTag.startsWith(SELECT_LOGD_TAG_SILENCE)) {
currentValue = SELECT_LOGD_OFF_SIZE_MARKER_VALUE;
}
LocalBroadcastManager.getInstance(mContext).sendBroadcastSync(
new Intent(ACTION_LOGD_SIZE_UPDATED)
.putExtra(EXTRA_CURRENT_LOGD_VALUE, currentValue));
if ((currentValue == null) || (currentValue.length() == 0)) {
currentValue = defaultLogdSizeValue();
}
String[] values = mContext.getResources()
.getStringArray(R.array.select_logd_size_values);
String[] titles = mContext.getResources()
.getStringArray(R.array.select_logd_size_titles);
int index = 2; // punt to second entry if not found
if (SystemProperties.get("ro.config.low_ram").equals("true")) {
mLogdSize.setEntries(R.array.select_logd_size_lowram_titles);
titles = mContext.getResources()
.getStringArray(R.array.select_logd_size_lowram_titles);
index = 1;
}
String[] summaries = mContext.getResources()
.getStringArray(R.array.select_logd_size_summaries);
for (int i = 0; i < titles.length; i++) {
if (currentValue.equals(values[i])
|| currentValue.equals(titles[i])) {
index = i;
break;
}
}
mLogdSize.setValue(values[index]);
mLogdSize.setSummary(summaries[index]);
}
}
public void writeLogdSizeOption(Object newValue) {
boolean disable = (newValue != null) &&
(newValue.toString().equals(SELECT_LOGD_OFF_SIZE_MARKER_VALUE));
String currentTag = SystemProperties.get(SELECT_LOGD_TAG_PROPERTY);
if (currentTag == null) {
currentTag = "";
}
// filter clean and unstack all references to our setting
String newTag = currentTag.replaceAll(
",+" + SELECT_LOGD_TAG_SILENCE, "").replaceFirst(
"^" + SELECT_LOGD_TAG_SILENCE + ",*", "").replaceAll(
",+", ",").replaceFirst(
",+$", "");
if (disable) {
newValue = SELECT_LOGD_MINIMUM_SIZE_VALUE;
// Make sure snet_event_log get through first, but do not override
String snetValue = SystemProperties.get(SELECT_LOGD_SNET_TAG_PROPERTY);
if ((snetValue == null) || (snetValue.length() == 0)) {
snetValue = SystemProperties.get(SELECT_LOGD_RUNTIME_SNET_TAG_PROPERTY);
if ((snetValue == null) || (snetValue.length() == 0)) {
SystemProperties.set(SELECT_LOGD_SNET_TAG_PROPERTY, DEFAULT_SNET_TAG);
}
}
// Silence all log sources, security logs notwithstanding
if (newTag.length() != 0) {
newTag = "," + newTag;
}
// Stack settings, stack to help preserve original value
newTag = SELECT_LOGD_TAG_SILENCE + newTag;
}
if (!newTag.equals(currentTag)) {
SystemProperties.set(SELECT_LOGD_TAG_PROPERTY, newTag);
}
String defaultValue = defaultLogdSizeValue();
final String size = ((newValue != null) && (newValue.toString().length() != 0)) ?
newValue.toString() : defaultValue;
SystemProperties.set(SELECT_LOGD_SIZE_PROPERTY, defaultValue.equals(size) ? "" : size);
SystemProperties.set("ctl.start", "logd-reinit");
SystemPropPoker.getInstance().poke();
updateLogdSizeValues();
}
}
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