| /* |
| * 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.util.Pair; |
| import android.view.KeyEvent; |
| |
| import com.android.inputmethod.keyboard.KeyboardSwitcher; |
| import com.android.inputmethod.latin.settings.Settings; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| 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 static final boolean DEBUG = false; |
| |
| private List<EmojiHotKeys> mHotKeysList; |
| |
| private static class HotKeySet extends HashSet<Pair<Integer, Integer>> { }; |
| |
| private abstract class EmojiHotKeys { |
| private final String mName; |
| private final HotKeySet mKeySet; |
| |
| boolean mCanFire; |
| int mMetaState; |
| |
| public EmojiHotKeys(final String name, HotKeySet keySet) { |
| mName = name; |
| mKeySet = keySet; |
| mCanFire = false; |
| } |
| |
| public void onKeyDown(@Nonnull final KeyEvent keyEvent) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyDown() - " + mName + " - considering " + keyEvent); |
| } |
| |
| final Pair<Integer, Integer> key = |
| Pair.create(keyEvent.getKeyCode(), keyEvent.getMetaState()); |
| if (mKeySet.contains(key)) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyDown() - " + mName + " - enabling action"); |
| } |
| mCanFire = true; |
| mMetaState = keyEvent.getMetaState(); |
| } else if (mCanFire) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyDown() - " + mName + " - disabling action"); |
| } |
| mCanFire = false; |
| } |
| } |
| |
| public void onKeyUp(@Nonnull final KeyEvent keyEvent) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyUp() - " + mName + " - considering " + keyEvent); |
| } |
| |
| final int keyCode = keyEvent.getKeyCode(); |
| int metaState = keyEvent.getMetaState(); |
| if (KeyEvent.isModifierKey(keyCode)) { |
| // Try restoring meta stat in case the released key was a modifier. |
| // I am sure one can come up with scenarios to break this, but it |
| // seems to work well in practice. |
| metaState |= mMetaState; |
| } |
| |
| final Pair<Integer, Integer> key = Pair.create(keyCode, metaState); |
| if (mKeySet.contains(key)) { |
| if (mCanFire) { |
| if (!keyEvent.isCanceled()) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyUp() - " + mName + " - firing action"); |
| } |
| action(); |
| } else { |
| // This key up event was a part of key combinations and |
| // should be ignored. |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyUp() - " + mName + " - canceled, ignoring action"); |
| } |
| } |
| mCanFire = false; |
| } |
| } |
| |
| if (mCanFire) { |
| if (DEBUG) { |
| Log.d(TAG, "EmojiHotKeys.onKeyUp() - " + mName + " - disabling action"); |
| } |
| mCanFire = false; |
| } |
| } |
| |
| protected abstract void action(); |
| } |
| |
| public EmojiAltPhysicalKeyDetector(@Nonnull final Resources resources) { |
| mHotKeysList = new ArrayList<EmojiHotKeys>(); |
| |
| final HotKeySet emojiSwitchSet = parseHotKeys( |
| resources, R.array.keyboard_switcher_emoji); |
| final EmojiHotKeys emojiHotKeys = new EmojiHotKeys("emoji", emojiSwitchSet) { |
| @Override |
| protected void action() { |
| final KeyboardSwitcher switcher = KeyboardSwitcher.getInstance(); |
| switcher.onToggleKeyboard(KeyboardSwitcher.KeyboardSwitchState.EMOJI); |
| } |
| }; |
| mHotKeysList.add(emojiHotKeys); |
| |
| final HotKeySet symbolsSwitchSet = parseHotKeys( |
| resources, R.array.keyboard_switcher_symbols_shifted); |
| final EmojiHotKeys symbolsHotKeys = new EmojiHotKeys("symbols", symbolsSwitchSet) { |
| @Override |
| protected void action() { |
| final KeyboardSwitcher switcher = KeyboardSwitcher.getInstance(); |
| switcher.onToggleKeyboard(KeyboardSwitcher.KeyboardSwitchState.SYMBOLS_SHIFTED); |
| } |
| }; |
| mHotKeysList.add(symbolsHotKeys); |
| } |
| |
| public void onKeyDown(@Nonnull final KeyEvent keyEvent) { |
| if (DEBUG) { |
| Log.d(TAG, "onKeyDown(): " + keyEvent); |
| } |
| |
| if (shouldProcessEvent(keyEvent)) { |
| for (EmojiHotKeys hotKeys : mHotKeysList) { |
| hotKeys.onKeyDown(keyEvent); |
| } |
| } |
| } |
| |
| public void onKeyUp(@Nonnull final KeyEvent keyEvent) { |
| if (DEBUG) { |
| Log.d(TAG, "onKeyUp(): " + keyEvent); |
| } |
| |
| if (shouldProcessEvent(keyEvent)) { |
| for (EmojiHotKeys hotKeys : mHotKeysList) { |
| hotKeys.onKeyUp(keyEvent); |
| } |
| } |
| } |
| |
| private static boolean shouldProcessEvent(@Nonnull final KeyEvent keyEvent) { |
| if (!Settings.getInstance().getCurrent().mEnableEmojiAltPhysicalKey) { |
| // The feature is disabled. |
| if (DEBUG) { |
| Log.d(TAG, "shouldProcessEvent(): Disabled"); |
| } |
| return false; |
| } |
| |
| return true; |
| } |
| |
| private static HotKeySet parseHotKeys( |
| @Nonnull final Resources resources, final int resourceId) { |
| final HotKeySet keySet = new HotKeySet(); |
| 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 { |
| final Integer keyCode = Integer.parseInt(valuePair[0]); |
| final Integer metaState = Integer.parseInt(valuePair[1]); |
| final Pair<Integer, Integer> key = Pair.create( |
| keyCode, KeyEvent.normalizeMetaState(metaState)); |
| keySet.add(key); |
| } catch (NumberFormatException e) { |
| Log.w(TAG, "Failed to parse " + name + "[" + i + "] : " + values[i], e); |
| } |
| } |
| return keySet; |
| } |
| } |