| /* |
| * Copyright (C) 2014, 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.latin; |
| |
| import android.content.res.Resources; |
| import android.util.Log; |
| import android.view.KeyEvent; |
| |
| import com.android.inputmethod.keyboard.KeyboardSwitcher; |
| import com.android.inputmethod.latin.settings.Settings; |
| |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.annotation.Nonnull; |
| |
| /** |
| * A class for detecting Emoji-Alt physical key. |
| */ |
| final class EmojiAltPhysicalKeyDetector { |
| private static final String TAG = "EmojiAltPhysicalKeyDetector"; |
| |
| private final Map<Integer, Integer> mEmojiSwitcherMap; |
| private final Map<Integer, Integer> mSymbolsShiftedSwitcherMap; |
| private final Map<Integer, Integer> mCombinedSwitcherMap; |
| |
| // Set of keys codes that have been used as modifiers. |
| private Set<Integer> mActiveModifiers; |
| |
| public EmojiAltPhysicalKeyDetector(@Nonnull final Resources resources) { |
| mEmojiSwitcherMap = parseSwitchDefinition(resources, R.array.keyboard_switcher_emoji); |
| mSymbolsShiftedSwitcherMap = parseSwitchDefinition( |
| resources, R.array.keyboard_switcher_symbols_shifted); |
| mCombinedSwitcherMap = new HashMap<>(); |
| mCombinedSwitcherMap.putAll(mEmojiSwitcherMap); |
| mCombinedSwitcherMap.putAll(mSymbolsShiftedSwitcherMap); |
| mActiveModifiers = new HashSet<>(); |
| } |
| |
| private static Map<Integer, Integer> parseSwitchDefinition( |
| @Nonnull final Resources resources, |
| final int resourceId) { |
| final Map<Integer, Integer> definition = new HashMap<>(); |
| final String name = resources.getResourceEntryName(resourceId); |
| final String[] values = resources.getStringArray(resourceId); |
| for (int i = 0; values != null && i < values.length; i++) { |
| String[] valuePair = values[i].split(","); |
| if (valuePair.length != 2) { |
| Log.w(TAG, "Expected 2 integers in " + name + "[" + i + "] : " + values[i]); |
| } |
| try { |
| definition.put(Integer.parseInt(valuePair[0]), Integer.parseInt(valuePair[1])); |
| } catch (NumberFormatException e) { |
| Log.w(TAG, "Failed to parse " + name + "[" + i + "] : " + values[i], e); |
| } |
| } |
| return definition; |
| } |
| |
| /** |
| * Determine whether an up key event came from a mapped modifier key. |
| * |
| * @param keyEvent an up key event. |
| */ |
| public void onKeyUp(@Nonnull final KeyEvent keyEvent) { |
| Log.d(TAG, "onKeyUp() : " + keyEvent); |
| if (!Settings.getInstance().getCurrent().mEnableEmojiAltPhysicalKey) { |
| // The feature is disabled. |
| Log.d(TAG, "onKeyUp() : Disabled"); |
| return; |
| } |
| if (keyEvent.isCanceled()) { |
| // This key up event was a part of key combinations and should be ignored. |
| Log.d(TAG, "onKeyUp() : Canceled"); |
| return; |
| } |
| final Integer mappedModifier = getMappedModifier(keyEvent); |
| if (mappedModifier != null) { |
| // If the key was modified by a mapped key, then ignore the next time |
| // the same modifier key comes up. |
| Log.d(TAG, "onKeyUp() : Using Modifier: " + mappedModifier); |
| mActiveModifiers.add(mappedModifier); |
| return; |
| } |
| final int keyCode = keyEvent.getKeyCode(); |
| if (mActiveModifiers.contains(keyCode)) { |
| // Used as a modifier, not a standalone key press. |
| Log.d(TAG, "onKeyUp() : Used as Modifier: " + keyCode); |
| mActiveModifiers.remove(keyCode); |
| return; |
| } |
| if (!isMappedKeyCode(keyEvent)) { |
| // Nothing special about this key. |
| Log.d(TAG, "onKeyUp() : Not Mapped: " + keyCode); |
| return; |
| } |
| final KeyboardSwitcher switcher = KeyboardSwitcher.getInstance(); |
| if (mEmojiSwitcherMap.keySet().contains(keyCode)) { |
| switcher.onToggleKeyboard(KeyboardSwitcher.KeyboardSwitchState.EMOJI); |
| } else if (mSymbolsShiftedSwitcherMap.keySet().contains(keyCode)) { |
| switcher.onToggleKeyboard(KeyboardSwitcher.KeyboardSwitchState.SYMBOLS_SHIFTED); |
| } else { |
| Log.w(TAG, "Cannot toggle on keyCode: " + keyCode); |
| } |
| } |
| |
| /** |
| * @param keyEvent pressed key event |
| * @return true iff the user pressed a mapped modifier key. |
| */ |
| private boolean isMappedKeyCode(@Nonnull final KeyEvent keyEvent) { |
| return mCombinedSwitcherMap.get(keyEvent.getKeyCode()) != null; |
| } |
| |
| /** |
| * @param keyEvent pressed key event |
| * @return the mapped modifier used with this key opress, if any. |
| */ |
| private Integer getMappedModifier(@Nonnull final KeyEvent keyEvent) { |
| final int keyCode = keyEvent.getKeyCode(); |
| final int metaState = keyEvent.getMetaState(); |
| for (int mappedKeyCode : mCombinedSwitcherMap.keySet()) { |
| if (keyCode == mappedKeyCode) { |
| Log.d(TAG, "getMappedModifier() : KeyCode = MappedKeyCode = " + mappedKeyCode); |
| continue; |
| } |
| final Integer mappedMeta = mCombinedSwitcherMap.get(mappedKeyCode); |
| if (mappedMeta == null || mappedMeta.intValue() == -1) { |
| continue; |
| } |
| if ((metaState & mappedMeta) != 0) { |
| Log.d(TAG, "getMappedModifier() : MetaState(" + metaState |
| + ") contains MappedMeta(" + mappedMeta + ")"); |
| return mappedKeyCode; |
| } |
| } |
| return null; |
| } |
| } |