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.text.TextUtils;
21import android.view.inputmethod.InputMethodSubtype;
22
23import com.android.inputmethod.annotations.UsedForTesting;
24import com.android.inputmethod.latin.RichInputMethodSubtype;
25import com.android.inputmethod.latin.common.Constants;
26import com.android.inputmethod.latin.common.LocaleUtils;
27
28import java.lang.reflect.Constructor;
29import java.lang.reflect.Method;
30import java.util.Locale;
31
32import javax.annotation.Nonnull;
33
34public final class InputMethodSubtypeCompatUtils {
35    private static final String TAG = InputMethodSubtypeCompatUtils.class.getSimpleName();
36    // Note that InputMethodSubtype(int nameId, int iconId, String locale, String mode,
37    // String extraValue, boolean isAuxiliary, boolean overridesImplicitlyEnabledSubtype, int id)
38    // has been introduced in API level 17 (Build.VERSION_CODE.JELLY_BEAN_MR1).
39    private static final Constructor<?> CONSTRUCTOR_INPUT_METHOD_SUBTYPE =
40            CompatUtils.getConstructor(InputMethodSubtype.class,
41                    int.class, int.class, String.class, String.class, String.class, boolean.class,
42                    boolean.class, int.class);
43    static {
44        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
45            if (CONSTRUCTOR_INPUT_METHOD_SUBTYPE == null) {
46                android.util.Log.w(TAG, "Warning!!! Constructor is not defined.");
47            }
48        }
49    }
50
51    // Note that {@link InputMethodSubtype#isAsciiCapable()} has been introduced in API level 19
52    // (Build.VERSION_CODE.KITKAT).
53    private static final Method METHOD_isAsciiCapable = CompatUtils.getMethod(
54            InputMethodSubtype.class, "isAsciiCapable");
55
56    private InputMethodSubtypeCompatUtils() {
57        // This utility class is not publicly instantiable.
58    }
59
60    @SuppressWarnings("deprecation")
61    @Nonnull
62    public static InputMethodSubtype newInputMethodSubtype(int nameId, int iconId, String locale,
63            String mode, String extraValue, boolean isAuxiliary,
64            boolean overridesImplicitlyEnabledSubtype, int id) {
65        if (CONSTRUCTOR_INPUT_METHOD_SUBTYPE == null
66                || Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
67            return new InputMethodSubtype(nameId, iconId, locale, mode, extraValue, isAuxiliary,
68                    overridesImplicitlyEnabledSubtype);
69        }
70        return (InputMethodSubtype) CompatUtils.newInstance(CONSTRUCTOR_INPUT_METHOD_SUBTYPE,
71                nameId, iconId, locale, mode, extraValue, isAuxiliary,
72                overridesImplicitlyEnabledSubtype, id);
73    }
74
75    public static boolean isAsciiCapable(final RichInputMethodSubtype subtype) {
76        return isAsciiCapable(subtype.getRawSubtype());
77    }
78
79    public static boolean isAsciiCapable(final InputMethodSubtype subtype) {
80        return isAsciiCapableWithAPI(subtype)
81                || subtype.containsExtraValueKey(Constants.Subtype.ExtraValue.ASCII_CAPABLE);
82    }
83
84    // Note that InputMethodSubtype.getLanguageTag() is expected to be available in Android N+.
85    private static final Method GET_LANGUAGE_TAG =
86            CompatUtils.getMethod(InputMethodSubtype.class, "getLanguageTag");
87
88    public static Locale getLocaleObject(final InputMethodSubtype subtype) {
89        // Locale.forLanguageTag() is available only in Android L and later.
90        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
91            final String languageTag = (String) CompatUtils.invoke(subtype, null, GET_LANGUAGE_TAG);
92            if (!TextUtils.isEmpty(languageTag)) {
93                return Locale.forLanguageTag(languageTag);
94            }
95        }
96        return LocaleUtils.constructLocaleFromString(subtype.getLocale());
97    }
98
99    @UsedForTesting
100    public static boolean isAsciiCapableWithAPI(final InputMethodSubtype subtype) {
101        return (Boolean)CompatUtils.invoke(subtype, false, METHOD_isAsciiCapable);
102    }
103}
104