122 lines
4.9 KiB
Java
122 lines
4.9 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.compat;
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import android.content.Context;
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import android.text.Spannable;
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import android.text.SpannableString;
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import android.text.Spanned;
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import android.text.TextUtils;
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import android.text.style.SuggestionSpan;
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import com.android.inputmethod.annotations.UsedForTesting;
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import com.android.inputmethod.latin.SuggestedWords;
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import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
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import com.android.inputmethod.latin.common.LocaleUtils;
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import com.android.inputmethod.latin.define.DebugFlags;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.Locale;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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public final class SuggestionSpanUtils {
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// Note that SuggestionSpan.FLAG_AUTO_CORRECTION has been introduced
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// in API level 15 (Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1).
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private static final Field FIELD_FLAG_AUTO_CORRECTION = CompatUtils.getField(
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SuggestionSpan.class, "FLAG_AUTO_CORRECTION");
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private static final Integer OBJ_FLAG_AUTO_CORRECTION = (Integer) CompatUtils.getFieldValue(
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null /* receiver */, null /* defaultValue */, FIELD_FLAG_AUTO_CORRECTION);
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static {
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if (DebugFlags.DEBUG_ENABLED) {
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if (OBJ_FLAG_AUTO_CORRECTION == null) {
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throw new RuntimeException("Field is accidentially null.");
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}
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}
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}
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private SuggestionSpanUtils() {
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// This utility class is not publicly instantiable.
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}
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@UsedForTesting
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public static CharSequence getTextWithAutoCorrectionIndicatorUnderline(
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final Context context, final String text, @Nonnull final Locale locale) {
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if (TextUtils.isEmpty(text) || OBJ_FLAG_AUTO_CORRECTION == null) {
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return text;
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}
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final Spannable spannable = new SpannableString(text);
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final SuggestionSpan suggestionSpan = new SuggestionSpan(context, locale,
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new String[] {} /* suggestions */, OBJ_FLAG_AUTO_CORRECTION, null);
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spannable.setSpan(suggestionSpan, 0, text.length(),
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Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_COMPOSING);
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return spannable;
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}
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@UsedForTesting
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public static CharSequence getTextWithSuggestionSpan(final Context context,
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final String pickedWord, final SuggestedWords suggestedWords, final Locale locale) {
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if (TextUtils.isEmpty(pickedWord) || suggestedWords.isEmpty()
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|| suggestedWords.isPrediction() || suggestedWords.isPunctuationSuggestions()) {
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return pickedWord;
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}
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final ArrayList<String> suggestionsList = new ArrayList<>();
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for (int i = 0; i < suggestedWords.size(); ++i) {
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if (suggestionsList.size() >= SuggestionSpan.SUGGESTIONS_MAX_SIZE) {
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break;
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}
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final SuggestedWordInfo info = suggestedWords.getInfo(i);
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if (info.isKindOf(SuggestedWordInfo.KIND_PREDICTION)) {
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continue;
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}
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final String word = suggestedWords.getWord(i);
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if (!TextUtils.equals(pickedWord, word)) {
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suggestionsList.add(word.toString());
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}
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}
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final SuggestionSpan suggestionSpan = new SuggestionSpan(context, locale,
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suggestionsList.toArray(new String[suggestionsList.size()]), 0 /* flags */, null);
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final Spannable spannable = new SpannableString(pickedWord);
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spannable.setSpan(suggestionSpan, 0, pickedWord.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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return spannable;
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}
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/**
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* Returns first {@link Locale} found in the given array of {@link SuggestionSpan}.
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* @param suggestionSpans the array of {@link SuggestionSpan} to be examined.
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* @return the first {@link Locale} found in {@code suggestionSpans}. {@code null} when not
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* found.
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*/
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@UsedForTesting
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@Nullable
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public static Locale findFirstLocaleFromSuggestionSpans(
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final SuggestionSpan[] suggestionSpans) {
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for (final SuggestionSpan suggestionSpan : suggestionSpans) {
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final String localeString = suggestionSpan.getLocale();
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if (TextUtils.isEmpty(localeString)) {
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continue;
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}
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return LocaleUtils.constructLocaleFromString(localeString);
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}
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return null;
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}
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}
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