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/*
* Copyright (C) 2012 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.server.input;
import com.android.internal.inputmethod.InputMethodSubtypeHandle;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.FastXmlSerializer;
import com.android.internal.util.XmlUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
import android.annotation.Nullable;
import android.view.Surface;
import android.hardware.input.TouchCalibration;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.AtomicFile;
import android.util.Slog;
import android.util.Xml;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import libcore.io.IoUtils;
import libcore.util.Objects;
/**
* Manages persistent state recorded by the input manager service as an XML file.
* Caller must acquire lock on the data store before accessing it.
*
* File format:
* <code>
* &lt;input-mananger-state>
* &lt;input-devices>
* &lt;input-device descriptor="xxxxx" keyboard-layout="yyyyy" />
* &gt;input-devices>
* &gt;/input-manager-state>
* </code>
*/
final class PersistentDataStore {
static final String TAG = "InputManager";
// Input device state by descriptor.
private final HashMap<String, InputDeviceState> mInputDevices =
new HashMap<String, InputDeviceState>();
private final AtomicFile mAtomicFile;
// True if the data has been loaded.
private boolean mLoaded;
// True if there are changes to be saved.
private boolean mDirty;
public PersistentDataStore() {
mAtomicFile = new AtomicFile(new File("/data/system/input-manager-state.xml"));
}
public void saveIfNeeded() {
if (mDirty) {
save();
mDirty = false;
}
}
public TouchCalibration getTouchCalibration(String inputDeviceDescriptor, int surfaceRotation) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, false);
if (state == null) {
return TouchCalibration.IDENTITY;
}
TouchCalibration cal = state.getTouchCalibration(surfaceRotation);
if (cal == null) {
return TouchCalibration.IDENTITY;
}
return cal;
}
public boolean setTouchCalibration(String inputDeviceDescriptor, int surfaceRotation, TouchCalibration calibration) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, true);
if (state.setTouchCalibration(surfaceRotation, calibration)) {
setDirty();
return true;
}
return false;
}
public String getCurrentKeyboardLayout(String inputDeviceDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, false);
return state != null ? state.getCurrentKeyboardLayout() : null;
}
public boolean setCurrentKeyboardLayout(String inputDeviceDescriptor,
String keyboardLayoutDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, true);
if (state.setCurrentKeyboardLayout(keyboardLayoutDescriptor)) {
setDirty();
return true;
}
return false;
}
public String[] getKeyboardLayouts(String inputDeviceDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, false);
if (state == null) {
return (String[])ArrayUtils.emptyArray(String.class);
}
return state.getKeyboardLayouts();
}
public String getKeyboardLayout(String inputDeviceDescriptor,
InputMethodSubtypeHandle imeHandle) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, false);
if (state == null) {
return null;
}
return state.getKeyboardLayout(imeHandle);
}
public boolean setKeyboardLayout(String inputDeviceDescriptor,
InputMethodSubtypeHandle imeHandle, String keyboardLayoutDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, true);
if (state.setKeyboardLayout(imeHandle, keyboardLayoutDescriptor)) {
setDirty();
return true;
}
return false;
}
public boolean addKeyboardLayout(String inputDeviceDescriptor, String keyboardLayoutDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, true);
if (state.addKeyboardLayout(keyboardLayoutDescriptor)) {
setDirty();
return true;
}
return false;
}
public boolean removeKeyboardLayout(String inputDeviceDescriptor,
String keyboardLayoutDescriptor) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, true);
if (state.removeKeyboardLayout(keyboardLayoutDescriptor)) {
setDirty();
return true;
}
return false;
}
public boolean switchKeyboardLayout(String inputDeviceDescriptor,
InputMethodSubtypeHandle imeHandle) {
InputDeviceState state = getInputDeviceState(inputDeviceDescriptor, false);
if (state != null && state.switchKeyboardLayout(imeHandle)) {
setDirty();
return true;
}
return false;
}
public boolean removeUninstalledKeyboardLayouts(Set<String> availableKeyboardLayouts) {
boolean changed = false;
for (InputDeviceState state : mInputDevices.values()) {
if (state.removeUninstalledKeyboardLayouts(availableKeyboardLayouts)) {
changed = true;
}
}
if (changed) {
setDirty();
return true;
}
return false;
}
private InputDeviceState getInputDeviceState(String inputDeviceDescriptor,
boolean createIfAbsent) {
loadIfNeeded();
InputDeviceState state = mInputDevices.get(inputDeviceDescriptor);
if (state == null && createIfAbsent) {
state = new InputDeviceState();
mInputDevices.put(inputDeviceDescriptor, state);
setDirty();
}
return state;
}
private void loadIfNeeded() {
if (!mLoaded) {
load();
mLoaded = true;
}
}
private void setDirty() {
mDirty = true;
}
private void clearState() {
mInputDevices.clear();
}
private void load() {
clearState();
final InputStream is;
try {
is = mAtomicFile.openRead();
} catch (FileNotFoundException ex) {
return;
}
XmlPullParser parser;
try {
parser = Xml.newPullParser();
parser.setInput(new BufferedInputStream(is), StandardCharsets.UTF_8.name());
loadFromXml(parser);
} catch (IOException ex) {
Slog.w(InputManagerService.TAG, "Failed to load input manager persistent store data.", ex);
clearState();
} catch (XmlPullParserException ex) {
Slog.w(InputManagerService.TAG, "Failed to load input manager persistent store data.", ex);
clearState();
} finally {
IoUtils.closeQuietly(is);
}
}
private void save() {
final FileOutputStream os;
try {
os = mAtomicFile.startWrite();
boolean success = false;
try {
XmlSerializer serializer = new FastXmlSerializer();
serializer.setOutput(new BufferedOutputStream(os), StandardCharsets.UTF_8.name());
saveToXml(serializer);
serializer.flush();
success = true;
} finally {
if (success) {
mAtomicFile.finishWrite(os);
} else {
mAtomicFile.failWrite(os);
}
}
} catch (IOException ex) {
Slog.w(InputManagerService.TAG, "Failed to save input manager persistent store data.", ex);
}
}
private void loadFromXml(XmlPullParser parser)
throws IOException, XmlPullParserException {
XmlUtils.beginDocument(parser, "input-manager-state");
final int outerDepth = parser.getDepth();
while (XmlUtils.nextElementWithin(parser, outerDepth)) {
if (parser.getName().equals("input-devices")) {
loadInputDevicesFromXml(parser);
}
}
}
private void loadInputDevicesFromXml(XmlPullParser parser)
throws IOException, XmlPullParserException {
final int outerDepth = parser.getDepth();
while (XmlUtils.nextElementWithin(parser, outerDepth)) {
if (parser.getName().equals("input-device")) {
String descriptor = parser.getAttributeValue(null, "descriptor");
if (descriptor == null) {
throw new XmlPullParserException(
"Missing descriptor attribute on input-device.");
}
if (mInputDevices.containsKey(descriptor)) {
throw new XmlPullParserException("Found duplicate input device.");
}
InputDeviceState state = new InputDeviceState();
state.loadFromXml(parser);
mInputDevices.put(descriptor, state);
}
}
}
private void saveToXml(XmlSerializer serializer) throws IOException {
serializer.startDocument(null, true);
serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
serializer.startTag(null, "input-manager-state");
serializer.startTag(null, "input-devices");
for (Map.Entry<String, InputDeviceState> entry : mInputDevices.entrySet()) {
final String descriptor = entry.getKey();
final InputDeviceState state = entry.getValue();
serializer.startTag(null, "input-device");
serializer.attribute(null, "descriptor", descriptor);
state.saveToXml(serializer);
serializer.endTag(null, "input-device");
}
serializer.endTag(null, "input-devices");
serializer.endTag(null, "input-manager-state");
serializer.endDocument();
}
public void dump(PrintWriter pw, String prefix) {
pw.println(prefix + "PersistentDataStore");
pw.println(prefix + " mLoaded=" + mLoaded);
pw.println(prefix + " mDirty=" + mDirty);
pw.println(prefix + " InputDeviceStates:");
int i = 0;
for (Map.Entry<String, InputDeviceState> entry : mInputDevices.entrySet()) {
pw.println(prefix + " " + i++ + ": " + entry.getKey());
entry.getValue().dump(pw, prefix + " ");
}
}
private static final class InputDeviceState {
private static final String[] CALIBRATION_NAME = { "x_scale",
"x_ymix", "x_offset", "y_xmix", "y_scale", "y_offset" };
private TouchCalibration[] mTouchCalibration = new TouchCalibration[4];
@Nullable
private String mCurrentKeyboardLayout;
private List<String> mUnassociatedKeyboardLayouts = new ArrayList<>();
private ArrayMap<InputMethodSubtypeHandle, String> mKeyboardLayouts = new ArrayMap<>();
public TouchCalibration getTouchCalibration(int surfaceRotation) {
try {
return mTouchCalibration[surfaceRotation];
} catch (ArrayIndexOutOfBoundsException ex) {
Slog.w(InputManagerService.TAG, "Cannot get touch calibration.", ex);
return null;
}
}
public boolean setTouchCalibration(int surfaceRotation, TouchCalibration calibration) {
try {
if (!calibration.equals(mTouchCalibration[surfaceRotation])) {
mTouchCalibration[surfaceRotation] = calibration;
return true;
}
return false;
} catch (ArrayIndexOutOfBoundsException ex) {
Slog.w(InputManagerService.TAG, "Cannot set touch calibration.", ex);
return false;
}
}
@Nullable
public String getCurrentKeyboardLayout() {
return mCurrentKeyboardLayout;
}
public boolean setCurrentKeyboardLayout(String keyboardLayout) {
if (Objects.equal(mCurrentKeyboardLayout, keyboardLayout)) {
return false;
}
addKeyboardLayout(keyboardLayout);
mCurrentKeyboardLayout = keyboardLayout;
return true;
}
public String[] getKeyboardLayouts() {
if (mUnassociatedKeyboardLayouts.isEmpty()) {
return (String[])ArrayUtils.emptyArray(String.class);
}
return mUnassociatedKeyboardLayouts.toArray(
new String[mUnassociatedKeyboardLayouts.size()]);
}
public String getKeyboardLayout(InputMethodSubtypeHandle handle) {
return mKeyboardLayouts.get(handle);
}
public boolean setKeyboardLayout(InputMethodSubtypeHandle imeHandle,
String keyboardLayout) {
String existingLayout = mKeyboardLayouts.get(imeHandle);
if (TextUtils.equals(existingLayout, keyboardLayout)) {
return false;
}
mKeyboardLayouts.put(imeHandle, keyboardLayout);
return true;
}
public boolean addKeyboardLayout(String keyboardLayout) {
int index = Collections.binarySearch(
mUnassociatedKeyboardLayouts, keyboardLayout);
if (index >= 0) {
return false;
}
mUnassociatedKeyboardLayouts.add(-index - 1, keyboardLayout);
if (mCurrentKeyboardLayout == null) {
mCurrentKeyboardLayout = keyboardLayout;
}
return true;
}
public boolean removeKeyboardLayout(String keyboardLayout) {
int index = Collections.binarySearch(mUnassociatedKeyboardLayouts, keyboardLayout);
if (index < 0) {
return false;
}
mUnassociatedKeyboardLayouts.remove(index);
updateCurrentKeyboardLayoutIfRemoved(keyboardLayout, index);
return true;
}
private void updateCurrentKeyboardLayoutIfRemoved(
String removedKeyboardLayout, int removedIndex) {
if (Objects.equal(mCurrentKeyboardLayout, removedKeyboardLayout)) {
if (!mUnassociatedKeyboardLayouts.isEmpty()) {
int index = removedIndex;
if (index == mUnassociatedKeyboardLayouts.size()) {
index = 0;
}
mCurrentKeyboardLayout = mUnassociatedKeyboardLayouts.get(index);
} else {
mCurrentKeyboardLayout = null;
}
}
}
public boolean switchKeyboardLayout(InputMethodSubtypeHandle imeHandle) {
final String layout = mKeyboardLayouts.get(imeHandle);
if (!TextUtils.equals(mCurrentKeyboardLayout, layout)) {
mCurrentKeyboardLayout = layout;
return true;
}
return false;
}
public boolean removeUninstalledKeyboardLayouts(Set<String> availableKeyboardLayouts) {
boolean changed = false;
for (int i = mUnassociatedKeyboardLayouts.size(); i-- > 0; ) {
String keyboardLayout = mUnassociatedKeyboardLayouts.get(i);
if (!availableKeyboardLayouts.contains(keyboardLayout)) {
Slog.i(TAG, "Removing uninstalled keyboard layout " + keyboardLayout);
mUnassociatedKeyboardLayouts.remove(i);
updateCurrentKeyboardLayoutIfRemoved(keyboardLayout, i);
changed = true;
}
}
return changed;
}
public void loadFromXml(XmlPullParser parser)
throws IOException, XmlPullParserException {
final int outerDepth = parser.getDepth();
while (XmlUtils.nextElementWithin(parser, outerDepth)) {
if (parser.getName().equals("keyboard-layout")) {
String descriptor = parser.getAttributeValue(null, "descriptor");
if (descriptor == null) {
throw new XmlPullParserException(
"Missing descriptor attribute on keyboard-layout.");
}
String current = parser.getAttributeValue(null, "current");
if (current != null && current.equals("true")) {
if (mCurrentKeyboardLayout != null) {
throw new XmlPullParserException(
"Found multiple current keyboard layouts.");
}
mCurrentKeyboardLayout = descriptor;
}
String inputMethodId = parser.getAttributeValue(null, "input-method-id");
String inputMethodSubtypeId =
parser.getAttributeValue(null, "input-method-subtype-id");
if (inputMethodId == null && inputMethodSubtypeId != null
|| inputMethodId != null && inputMethodSubtypeId == null) {
throw new XmlPullParserException(
"Found an incomplete input method description");
}
if (inputMethodSubtypeId != null) {
InputMethodSubtypeHandle handle = new InputMethodSubtypeHandle(
inputMethodId, Integer.parseInt(inputMethodSubtypeId));
if (mKeyboardLayouts.containsKey(handle)) {
throw new XmlPullParserException(
"Found duplicate subtype to keyboard layout mapping: "
+ handle);
}
mKeyboardLayouts.put(handle, descriptor);
} else {
if (mUnassociatedKeyboardLayouts.contains(descriptor)) {
throw new XmlPullParserException(
"Found duplicate unassociated keyboard layout: " + descriptor);
}
mUnassociatedKeyboardLayouts.add(descriptor);
}
} else if (parser.getName().equals("calibration")) {
String format = parser.getAttributeValue(null, "format");
String rotation = parser.getAttributeValue(null, "rotation");
int r = -1;
if (format == null) {
throw new XmlPullParserException(
"Missing format attribute on calibration.");
}
if (!format.equals("affine")) {
throw new XmlPullParserException(
"Unsupported format for calibration.");
}
if (rotation != null) {
try {
r = stringToSurfaceRotation(rotation);
} catch (IllegalArgumentException e) {
throw new XmlPullParserException(
"Unsupported rotation for calibration.");
}
}
float[] matrix = TouchCalibration.IDENTITY.getAffineTransform();
int depth = parser.getDepth();
while (XmlUtils.nextElementWithin(parser, depth)) {
String tag = parser.getName().toLowerCase();
String value = parser.nextText();
for (int i = 0; i < matrix.length && i < CALIBRATION_NAME.length; i++) {
if (tag.equals(CALIBRATION_NAME[i])) {
matrix[i] = Float.parseFloat(value);
break;
}
}
}
if (r == -1) {
// Assume calibration applies to all rotations
for (r = 0; r < mTouchCalibration.length; r++) {
mTouchCalibration[r] = new TouchCalibration(matrix[0],
matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]);
}
} else {
mTouchCalibration[r] = new TouchCalibration(matrix[0],
matrix[1], matrix[2], matrix[3], matrix[4], matrix[5]);
}
}
}
// Maintain invariant that layouts are sorted.
Collections.sort(mUnassociatedKeyboardLayouts);
// Maintain invariant that there is always a current keyboard layout unless
// there are none installed.
if (mCurrentKeyboardLayout == null && !mUnassociatedKeyboardLayouts.isEmpty()) {
mCurrentKeyboardLayout = mUnassociatedKeyboardLayouts.get(0);
}
}
public void saveToXml(XmlSerializer serializer) throws IOException {
for (String layout : mUnassociatedKeyboardLayouts) {
serializer.startTag(null, "keyboard-layout");
serializer.attribute(null, "descriptor", layout);
serializer.endTag(null, "keyboard-layout");
}
final int N = mKeyboardLayouts.size();
for (int i = 0; i < N; i++) {
final InputMethodSubtypeHandle handle = mKeyboardLayouts.keyAt(i);
final String layout = mKeyboardLayouts.valueAt(i);
serializer.startTag(null, "keyboard-layout");
serializer.attribute(null, "descriptor", layout);
serializer.attribute(null, "input-method-id", handle.getInputMethodId());
serializer.attribute(null, "input-method-subtype-id",
Integer.toString(handle.getSubtypeId()));
if (layout.equals(mCurrentKeyboardLayout)) {
serializer.attribute(null, "current", "true");
}
serializer.endTag(null, "keyboard-layout");
}
for (int i = 0; i < mTouchCalibration.length; i++) {
if (mTouchCalibration[i] != null) {
String rotation = surfaceRotationToString(i);
float[] transform = mTouchCalibration[i].getAffineTransform();
serializer.startTag(null, "calibration");
serializer.attribute(null, "format", "affine");
serializer.attribute(null, "rotation", rotation);
for (int j = 0; j < transform.length && j < CALIBRATION_NAME.length; j++) {
serializer.startTag(null, CALIBRATION_NAME[j]);
serializer.text(Float.toString(transform[j]));
serializer.endTag(null, CALIBRATION_NAME[j]);
}
serializer.endTag(null, "calibration");
}
}
}
private void dump(final PrintWriter pw, final String prefix) {
pw.println(prefix + "CurrentKeyboardLayout=" + mCurrentKeyboardLayout);
pw.println(prefix + "UnassociatedKeyboardLayouts=" + mUnassociatedKeyboardLayouts);
pw.println(prefix + "TouchCalibration=" + Arrays.toString(mTouchCalibration));
pw.println(prefix + "Subtype to Layout Mappings:");
final int N = mKeyboardLayouts.size();
if (N != 0) {
for (int i = 0; i < N; i++) {
pw.println(prefix + " " + mKeyboardLayouts.keyAt(i) + ": "
+ mKeyboardLayouts.valueAt(i));
}
} else {
pw.println(prefix + " <none>");
}
}
private static String surfaceRotationToString(int surfaceRotation) {
switch (surfaceRotation) {
case Surface.ROTATION_0: return "0";
case Surface.ROTATION_90: return "90";
case Surface.ROTATION_180: return "180";
case Surface.ROTATION_270: return "270";
}
throw new IllegalArgumentException("Unsupported surface rotation value" + surfaceRotation);
}
private static int stringToSurfaceRotation(String s) {
if ("0".equals(s)) {
return Surface.ROTATION_0;
}
if ("90".equals(s)) {
return Surface.ROTATION_90;
}
if ("180".equals(s)) {
return Surface.ROTATION_180;
}
if ("270".equals(s)) {
return Surface.ROTATION_270;
}
throw new IllegalArgumentException("Unsupported surface rotation string '" + s + "'");
}
}
}