DynamicGridKeyboard.java revision d76b55297940a65bb9479020a9ed58aa978a0aea
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.keyboard.internal; 18 19import android.content.SharedPreferences; 20import android.text.TextUtils; 21import android.util.Log; 22 23import com.android.inputmethod.keyboard.EmojiPalettesView; 24import com.android.inputmethod.keyboard.Key; 25import com.android.inputmethod.keyboard.Keyboard; 26import com.android.inputmethod.latin.settings.Settings; 27import com.android.inputmethod.latin.utils.CollectionUtils; 28import com.android.inputmethod.latin.utils.StringUtils; 29 30import java.util.ArrayDeque; 31import java.util.ArrayList; 32import java.util.Collection; 33import java.util.List; 34 35/** 36 * This is a Keyboard class where you can add keys dynamically shown in a grid layout 37 */ 38public class DynamicGridKeyboard extends Keyboard { 39 private static final String TAG = DynamicGridKeyboard.class.getSimpleName(); 40 private static final int TEMPLATE_KEY_CODE_0 = 0x30; 41 private static final int TEMPLATE_KEY_CODE_1 = 0x31; 42 private final Object mLock = new Object(); 43 44 private final SharedPreferences mPrefs; 45 private final int mLeftPadding; 46 private final int mHorizontalStep; 47 private final int mVerticalStep; 48 private final int mColumnsNum; 49 private final int mMaxKeyCount; 50 private final boolean mIsRecents; 51 private final ArrayDeque<GridKey> mGridKeys = CollectionUtils.newArrayDeque(); 52 private final ArrayDeque<Key> mPendingKeys = CollectionUtils.newArrayDeque(); 53 54 private Key[] mCachedGridKeys; 55 56 public DynamicGridKeyboard(final SharedPreferences prefs, final Keyboard templateKeyboard, 57 final int maxKeyCount, final int categoryId, final int categoryPageId) { 58 super(templateKeyboard); 59 final Key key0 = getTemplateKey(TEMPLATE_KEY_CODE_0); 60 final Key key1 = getTemplateKey(TEMPLATE_KEY_CODE_1); 61 mLeftPadding = key0.getX(); 62 mHorizontalStep = Math.abs(key1.getX() - key0.getX()); 63 mVerticalStep = key0.getHeight() + mVerticalGap; 64 mColumnsNum = mBaseWidth / mHorizontalStep; 65 mMaxKeyCount = maxKeyCount; 66 mIsRecents = categoryId == EmojiPalettesView.CATEGORY_ID_RECENTS; 67 mPrefs = prefs; 68 } 69 70 private Key getTemplateKey(final int code) { 71 for (final Key key : super.getKeys()) { 72 if (key.getCode() == code) { 73 return key; 74 } 75 } 76 throw new RuntimeException("Can't find template key: code=" + code); 77 } 78 79 public void addPendingKey(final Key usedKey) { 80 synchronized (mLock) { 81 mPendingKeys.addLast(usedKey); 82 } 83 } 84 85 public void flushPendingRecentKeys() { 86 synchronized (mLock) { 87 while (!mPendingKeys.isEmpty()) { 88 addKey(mPendingKeys.pollFirst(), true); 89 } 90 saveRecentKeys(); 91 } 92 } 93 94 public void addKeyFirst(final Key usedKey) { 95 addKey(usedKey, true); 96 if (mIsRecents) { 97 saveRecentKeys(); 98 } 99 } 100 101 public void addKeyLast(final Key usedKey) { 102 addKey(usedKey, false); 103 } 104 105 private void addKey(final Key usedKey, final boolean addFirst) { 106 if (usedKey == null) { 107 return; 108 } 109 synchronized (mLock) { 110 mCachedGridKeys = null; 111 final GridKey key = new GridKey(usedKey); 112 while (mGridKeys.remove(key)) { 113 // Remove duplicate keys. 114 } 115 if (addFirst) { 116 mGridKeys.addFirst(key); 117 } else { 118 mGridKeys.addLast(key); 119 } 120 while (mGridKeys.size() > mMaxKeyCount) { 121 mGridKeys.removeLast(); 122 } 123 int index = 0; 124 for (final GridKey gridKey : mGridKeys) { 125 final int keyX = getKeyX(index); 126 final int keyY = getKeyY(index); 127 gridKey.updateCorrdinates(keyX, keyY); 128 index++; 129 } 130 } 131 } 132 133 private void saveRecentKeys() { 134 final ArrayList<Object> keys = CollectionUtils.newArrayList(); 135 for (final Key key : mGridKeys) { 136 if (key.getOutputText() != null) { 137 keys.add(key.getOutputText()); 138 } else { 139 keys.add(key.getCode()); 140 } 141 } 142 final String jsonStr = StringUtils.listToJsonStr(keys); 143 Settings.writeEmojiRecentKeys(mPrefs, jsonStr); 144 } 145 146 private static Key getKey(final Collection<DynamicGridKeyboard> keyboards, final Object o) { 147 for (final DynamicGridKeyboard kbd : keyboards) { 148 if (o instanceof Integer) { 149 final int code = (Integer) o; 150 final Key key = kbd.getKey(code); 151 if (key != null) { 152 return key; 153 } 154 } else if (o instanceof String) { 155 final String outputText = (String) o; 156 final Key key = kbd.getKeyFromOutputText(outputText); 157 if (key != null) { 158 return key; 159 } 160 } else { 161 Log.w(TAG, "Invalid object: " + o); 162 } 163 } 164 return null; 165 } 166 167 public void loadRecentKeys(Collection<DynamicGridKeyboard> keyboards) { 168 final String str = Settings.readEmojiRecentKeys(mPrefs); 169 final List<Object> keys = StringUtils.jsonStrToList(str); 170 for (final Object o : keys) { 171 addKeyLast(getKey(keyboards, o)); 172 } 173 } 174 175 private int getKeyX(final int index) { 176 final int column = index % mColumnsNum; 177 return column * mHorizontalStep + mLeftPadding; 178 } 179 180 private int getKeyY(final int index) { 181 final int row = index / mColumnsNum; 182 return row * mVerticalStep + mTopPadding; 183 } 184 185 @Override 186 public Key[] getKeys() { 187 synchronized (mLock) { 188 if (mCachedGridKeys != null) { 189 return mCachedGridKeys; 190 } 191 mCachedGridKeys = mGridKeys.toArray(new Key[mGridKeys.size()]); 192 return mCachedGridKeys; 193 } 194 } 195 196 @Override 197 public Key[] getNearestKeys(final int x, final int y) { 198 // TODO: Calculate the nearest key index in mGridKeys from x and y. 199 return getKeys(); 200 } 201 202 static final class GridKey extends Key { 203 private int mCurrentX; 204 private int mCurrentY; 205 206 public GridKey(final Key originalKey) { 207 super(originalKey); 208 } 209 210 public void updateCorrdinates(final int x, final int y) { 211 mCurrentX = x; 212 mCurrentY = y; 213 getHitBox().set(x, y, x + getWidth(), y + getHeight()); 214 } 215 216 @Override 217 public int getX() { 218 return mCurrentX; 219 } 220 221 @Override 222 public int getY() { 223 return mCurrentY; 224 } 225 226 @Override 227 public boolean equals(final Object o) { 228 if (!(o instanceof Key)) return false; 229 final Key key = (Key)o; 230 if (getCode() != key.getCode()) return false; 231 if (!TextUtils.equals(getLabel(), key.getLabel())) return false; 232 return TextUtils.equals(getOutputText(), key.getOutputText()); 233 } 234 235 @Override 236 public String toString() { 237 return "GridKey: " + super.toString(); 238 } 239 } 240} 241