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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.inputmethod.latin;
import static com.android.inputmethod.latin.Constants.Subtype.KEYBOARD_MODE;
import android.content.Context;
import android.view.inputmethod.InputMethodInfo;
import android.view.inputmethod.InputMethodManager;
import android.view.inputmethod.InputMethodSubtype;
import java.util.Collections;
import java.util.List;
/**
* Utility class for Input Method Framework
*/
public final class ImfUtils {
private ImfUtils() {
// This utility class is not publicly instantiable.
}
private static InputMethodManager sInputMethodManager;
public static InputMethodManager getInputMethodManager(Context context) {
if (sInputMethodManager == null) {
sInputMethodManager = (InputMethodManager)context.getSystemService(
Context.INPUT_METHOD_SERVICE);
}
return sInputMethodManager;
}
private static InputMethodInfo sInputMethodInfoOfThisIme;
public static InputMethodInfo getInputMethodInfoOfThisIme(Context context) {
if (sInputMethodInfoOfThisIme == null) {
final InputMethodManager imm = getInputMethodManager(context);
final String packageName = context.getPackageName();
for (final InputMethodInfo imi : imm.getInputMethodList()) {
if (imi.getPackageName().equals(packageName))
return imi;
}
throw new RuntimeException("Can not find input method id for " + packageName);
}
return sInputMethodInfoOfThisIme;
}
public static String getInputMethodIdOfThisIme(Context context) {
return getInputMethodInfoOfThisIme(context).getId();
}
public static boolean checkIfSubtypeBelongsToThisImeAndEnabled(Context context,
InputMethodSubtype ims) {
final InputMethodInfo myImi = getInputMethodInfoOfThisIme(context);
final InputMethodManager imm = getInputMethodManager(context);
// TODO: Cache all subtypes of this IME for optimization
final List<InputMethodSubtype> subtypes = imm.getEnabledInputMethodSubtypeList(myImi, true);
for (final InputMethodSubtype subtype : subtypes) {
if (subtype.equals(ims)) {
return true;
}
}
return false;
}
public static boolean checkIfSubtypeBelongsToThisIme(Context context,
InputMethodSubtype ims) {
final InputMethodInfo myImi = getInputMethodInfoOfThisIme(context);
final int count = myImi.getSubtypeCount();
for (int i = 0; i < count; i++) {
final InputMethodSubtype subtype = myImi.getSubtypeAt(i);
if (subtype.equals(ims)) {
return true;
}
}
return false;
}
public static InputMethodSubtype getCurrentInputMethodSubtype(Context context,
InputMethodSubtype defaultSubtype) {
final InputMethodManager imm = getInputMethodManager(context);
final InputMethodSubtype currentSubtype = imm.getCurrentInputMethodSubtype();
return (currentSubtype != null) ? currentSubtype : defaultSubtype;
}
public static boolean hasMultipleEnabledIMEsOrSubtypes(Context context,
final boolean shouldIncludeAuxiliarySubtypes) {
final InputMethodManager imm = getInputMethodManager(context);
final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
return hasMultipleEnabledSubtypes(context, shouldIncludeAuxiliarySubtypes, enabledImis);
}
public static boolean hasMultipleEnabledSubtypesInThisIme(Context context,
final boolean shouldIncludeAuxiliarySubtypes) {
final InputMethodInfo myImi = getInputMethodInfoOfThisIme(context);
final List<InputMethodInfo> imiList = Collections.singletonList(myImi);
return hasMultipleEnabledSubtypes(context, shouldIncludeAuxiliarySubtypes, imiList);
}
private static boolean hasMultipleEnabledSubtypes(Context context,
final boolean shouldIncludeAuxiliarySubtypes, List<InputMethodInfo> imiList) {
final InputMethodManager imm = getInputMethodManager(context);
// Number of the filtered IMEs
int filteredImisCount = 0;
for (InputMethodInfo imi : imiList) {
// We can return true immediately after we find two or more filtered IMEs.
if (filteredImisCount > 1) return true;
final List<InputMethodSubtype> subtypes =
imm.getEnabledInputMethodSubtypeList(imi, true);
// IMEs that have no subtypes should be counted.
if (subtypes.isEmpty()) {
++filteredImisCount;
continue;
}
int auxCount = 0;
for (InputMethodSubtype subtype : subtypes) {
if (subtype.isAuxiliary()) {
++auxCount;
}
}
final int nonAuxCount = subtypes.size() - auxCount;
// IMEs that have one or more non-auxiliary subtypes should be counted.
// If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
// subtypes should be counted as well.
if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
++filteredImisCount;
continue;
}
}
if (filteredImisCount > 1) {
return true;
}
final List<InputMethodSubtype> subtypes = imm.getEnabledInputMethodSubtypeList(null, true);
int keyboardCount = 0;
// imm.getEnabledInputMethodSubtypeList(null, true) will return the current IME's
// both explicitly and implicitly enabled input method subtype.
// (The current IME should be LatinIME.)
for (InputMethodSubtype subtype : subtypes) {
if (KEYBOARD_MODE.equals(subtype.getMode())) {
++keyboardCount;
}
}
return keyboardCount > 1;
}
public static InputMethodSubtype findSubtypeByLocaleAndKeyboardLayoutSet(
Context context, String localeString, String keyboardLayoutSetName) {
final InputMethodInfo imi = getInputMethodInfoOfThisIme(context);
final int count = imi.getSubtypeCount();
for (int i = 0; i < count; i++) {
final InputMethodSubtype subtype = imi.getSubtypeAt(i);
final String layoutName = SubtypeLocale.getKeyboardLayoutSetName(subtype);
if (localeString.equals(subtype.getLocale())
&& keyboardLayoutSetName.equals(layoutName)) {
return subtype;
}
}
return null;
}
public static void setAdditionalInputMethodSubtypes(Context context,
InputMethodSubtype[] subtypes) {
final InputMethodManager imm = getInputMethodManager(context);
final String imiId = getInputMethodIdOfThisIme(context);
imm.setAdditionalInputMethodSubtypes(imiId, subtypes);
}
}
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