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/*
* Copyright (C) 2011 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.compat;
import com.android.inputmethod.latin.SuggestedWords;
import android.content.Context;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.Spanned;
import java.lang.reflect.Constructor;
public class SuggestionSpanUtils {
private static final Class<?> CLASS_SuggestionSpan =
CompatUtils.getClass("android.text.style.SuggestionSpan");
private static final Class<?>[] INPUT_TYPE_SuggestionSpan = new Class<?>[] {
Context.class, String[].class, int.class
};
private static final Constructor<?> CONSTRUCTOR_SuggestionSpan =
CompatUtils.getConstructor(CLASS_SuggestionSpan, INPUT_TYPE_SuggestionSpan);
public static final boolean SUGGESTION_SPAN_IS_SUPPORTED;
static {
SUGGESTION_SPAN_IS_SUPPORTED = CLASS_SuggestionSpan != null
&& CONSTRUCTOR_SuggestionSpan != null;
}
public static CharSequence getTextWithSuggestionSpan(
Context context, CharSequence suggestion, SuggestedWords suggestedWords) {
if (CONSTRUCTOR_SuggestionSpan == null || suggestedWords == null
|| suggestedWords.size() == 0) {
return suggestion;
}
final Spannable spannable;
if (suggestion instanceof Spannable) {
spannable = (Spannable) suggestion;
} else {
spannable = new SpannableString(suggestion);
}
// TODO: Use SUGGESTIONS_MAX_SIZE instead of 5.
final int N = Math.min(5, suggestedWords.size());
final String[] suggestionsArray = new String[N];
for (int i = 0; i < N; ++i) {
suggestionsArray[i] = suggestedWords.getWord(i).toString();
}
final Object[] args = {context, suggestionsArray, 0};
final Object ss = CompatUtils.newInstance(CONSTRUCTOR_SuggestionSpan, args);
if (ss == null) {
return suggestion;
}
spannable.setSpan(ss, 0, suggestion.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return spannable;
}
}
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