InputMethodSubtypeCompatUtils.java revision 03a1c442aeddbd511be92e11465b6206d2ca976c 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.inputmethod.compat;
18
19import android.os.Build;
20import android.view.inputmethod.InputMethodSubtype;
21
22import com.android.inputmethod.annotations.UsedForTesting;
23import com.android.inputmethod.latin.Constants;
24
25import java.lang.reflect.Constructor;
26import java.lang.reflect.Method;
27
28public final class InputMethodSubtypeCompatUtils {
29    private static final String TAG = InputMethodSubtypeCompatUtils.class.getSimpleName();
30    // Note that InputMethodSubtype(int nameId, int iconId, String locale, String mode,
31    // String extraValue, boolean isAuxiliary, boolean overridesImplicitlyEnabledSubtype, int id)
32    // has been introduced in API level 17 (Build.VERSION_CODE.JELLY_BEAN_MR1).
33    private static final Constructor<?> CONSTRUCTOR_INPUT_METHOD_SUBTYPE =
34            CompatUtils.getConstructor(InputMethodSubtype.class,
35                    int.class, int.class, String.class, String.class, String.class, boolean.class,
36                    boolean.class, int.class);
37    static {
38        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
39            if (CONSTRUCTOR_INPUT_METHOD_SUBTYPE == null) {
40                android.util.Log.w(TAG, "Warning!!! Constructor is not defined.");
41            }
42        }
43    }
44
45    // Note that {@link InputMethodSubtype#isAsciiCapable()} has been introduced in API level 19
46    // (Build.VERSION_CODE.KITKAT).
47    private static final Method METHOD_isAsciiCapable = CompatUtils.getMethod(
48            InputMethodSubtype.class, "isAsciiCapable");
49
50    private InputMethodSubtypeCompatUtils() {
51        // This utility class is not publicly instantiable.
52    }
53
54    public static InputMethodSubtype newInputMethodSubtype(int nameId, int iconId, String locale,
55            String mode, String extraValue, boolean isAuxiliary,
56            boolean overridesImplicitlyEnabledSubtype, int id) {
57        if (CONSTRUCTOR_INPUT_METHOD_SUBTYPE == null
58                || Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
59            return new InputMethodSubtype(nameId, iconId, locale, mode, extraValue, isAuxiliary,
60                    overridesImplicitlyEnabledSubtype);
61        }
62        return (InputMethodSubtype) CompatUtils.newInstance(CONSTRUCTOR_INPUT_METHOD_SUBTYPE,
63                nameId, iconId, locale, mode, extraValue, isAuxiliary,
64                overridesImplicitlyEnabledSubtype, id);
65    }
66
67    public static boolean isAsciiCapable(final InputMethodSubtype subtype) {
68        return isAsciiCapableWithAPI(subtype)
69                || subtype.containsExtraValueKey(Constants.Subtype.ExtraValue.ASCII_CAPABLE);
70    }
71
72    @UsedForTesting
73    public static boolean isAsciiCapableWithAPI(final InputMethodSubtype subtype) {
74        return (Boolean)CompatUtils.invoke(subtype, false, METHOD_isAsciiCapable);
75    }
76}
77