1 /* 2 * Copyright (C) 2011 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 17 package com.android.inputmethod.compat; 18 19 import com.android.inputmethod.latin.SuggestedWords; 20 import com.android.inputmethod.latin.SuggestionSpanPickedNotificationReceiver; 21 22 import android.content.Context; 23 import android.text.Spannable; 24 import android.text.SpannableString; 25 import android.text.Spanned; 26 import android.text.TextUtils; 27 import android.util.Log; 28 29 import java.lang.reflect.Constructor; 30 import java.util.ArrayList; 31 import java.util.Locale; 32 33 public class SuggestionSpanUtils { 34 private static final String TAG = SuggestionSpanUtils.class.getSimpleName(); 35 // TODO: Use reflection to get field values 36 public static final String ACTION_SUGGESTION_PICKED = 37 "android.text.style.SUGGESTION_PICKED"; 38 public static final String SUGGESTION_SPAN_PICKED_AFTER = "after"; 39 public static final String SUGGESTION_SPAN_PICKED_BEFORE = "before"; 40 public static final String SUGGESTION_SPAN_PICKED_HASHCODE = "hashcode"; 41 // TODO: Use the API constant after it gets public. 42 public static final int FLAG_AUTO_CORRECTION = 0x0004; 43 public static final int SUGGESTION_MAX_SIZE = 5; 44 public static final boolean SUGGESTION_SPAN_IS_SUPPORTED; 45 46 private static final Class<?> CLASS_SuggestionSpan = CompatUtils 47 .getClass("android.text.style.SuggestionSpan"); 48 private static final Class<?>[] INPUT_TYPE_SuggestionSpan = new Class<?>[] { 49 Context.class, Locale.class, String[].class, int.class, Class.class }; 50 private static final Constructor<?> CONSTRUCTOR_SuggestionSpan = CompatUtils 51 .getConstructor(CLASS_SuggestionSpan, INPUT_TYPE_SuggestionSpan); 52 static { 53 SUGGESTION_SPAN_IS_SUPPORTED = 54 CLASS_SuggestionSpan != null && CONSTRUCTOR_SuggestionSpan != null; 55 } 56 getTextWithAutoCorrectionIndicatorUnderline( Context context, CharSequence text)57 public static CharSequence getTextWithAutoCorrectionIndicatorUnderline( 58 Context context, CharSequence text) { 59 if (TextUtils.isEmpty(text) || CONSTRUCTOR_SuggestionSpan == null) { 60 return text; 61 } 62 final Spannable spannable = text instanceof Spannable 63 ? (Spannable) text : new SpannableString(text); 64 final Object[] args = 65 { context, null, new String[] {}, FLAG_AUTO_CORRECTION, 66 (Class<?>) SuggestionSpanPickedNotificationReceiver.class }; 67 final Object ss = CompatUtils.newInstance(CONSTRUCTOR_SuggestionSpan, args); 68 if (ss == null) { 69 Log.w(TAG, "Suggestion span was not created."); 70 return text; 71 } 72 spannable.setSpan(ss, 0, text.length(), 73 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE | Spanned.SPAN_COMPOSING); 74 return spannable; 75 } 76 getTextWithSuggestionSpan(Context context, CharSequence pickedWord, SuggestedWords suggestedWords)77 public static CharSequence getTextWithSuggestionSpan(Context context, 78 CharSequence pickedWord, SuggestedWords suggestedWords) { 79 if (TextUtils.isEmpty(pickedWord) || CONSTRUCTOR_SuggestionSpan == null 80 || suggestedWords == null || suggestedWords.size() == 0 81 || suggestedWords.getInfo(0).isObsoleteSuggestedWord()) { 82 return pickedWord; 83 } 84 85 final Spannable spannable; 86 if (pickedWord instanceof Spannable) { 87 spannable = (Spannable) pickedWord; 88 } else { 89 spannable = new SpannableString(pickedWord); 90 } 91 final ArrayList<String> suggestionsList = new ArrayList<String>(); 92 for (int i = 0; i < suggestedWords.size(); ++i) { 93 if (suggestionsList.size() >= SUGGESTION_MAX_SIZE) { 94 break; 95 } 96 final CharSequence word = suggestedWords.getWord(i); 97 if (!TextUtils.equals(pickedWord, word)) { 98 suggestionsList.add(word.toString()); 99 } 100 } 101 102 final Object[] args = 103 { context, null, suggestionsList.toArray(new String[suggestionsList.size()]), 0, 104 (Class<?>) SuggestionSpanPickedNotificationReceiver.class }; 105 final Object ss = CompatUtils.newInstance(CONSTRUCTOR_SuggestionSpan, args); 106 if (ss == null) { 107 return pickedWord; 108 } 109 spannable.setSpan(ss, 0, pickedWord.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); 110 return spannable; 111 } 112 } 113