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Diffstat (limited to 'java/src/com/android/inputmethod/event/EventInterpreter.java')
-rw-r--r-- | java/src/com/android/inputmethod/event/EventInterpreter.java | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/java/src/com/android/inputmethod/event/EventInterpreter.java b/java/src/com/android/inputmethod/event/EventInterpreter.java deleted file mode 100644 index 726b9206b..000000000 --- a/java/src/com/android/inputmethod/event/EventInterpreter.java +++ /dev/null @@ -1,133 +0,0 @@ -/* - * Copyright (C) 2012 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.event; - -import android.util.SparseArray; -import android.view.KeyEvent; - -import com.android.inputmethod.latin.Constants; -import com.android.inputmethod.latin.LatinIME; -import com.android.inputmethod.latin.utils.CollectionUtils; - -import java.util.ArrayList; - -/** - * This class implements the logic between receiving events and generating code points. - * - * Event sources are multiple. It may be a hardware keyboard, a D-PAD, a software keyboard, - * or any exotic input source. - * This class will orchestrate the decoding chain that starts with an event and ends up with - * a stream of code points + decoding state. - */ -public class EventInterpreter { - // TODO: Implement an object pool for events, as we'll create a lot of them - // TODO: Create a combiner - // TODO: Create an object type to represent input material + visual feedback + decoding state - // TODO: Create an interface to call back to Latin IME through the above object - - final EventDecoderSpec mDecoderSpec; - final SparseArray<HardwareEventDecoder> mHardwareEventDecoders; - final SoftwareEventDecoder mSoftwareEventDecoder; - final LatinIME mLatinIme; - final ArrayList<Combiner> mCombiners; - - /** - * Create a default interpreter. - * - * This creates a default interpreter that does nothing. A default interpreter should normally - * only be used for fallback purposes, when we really don't know what we want to do with input. - * - * @param latinIme a reference to the ime. - */ - public EventInterpreter(final LatinIME latinIme) { - this(null, latinIme); - } - - /** - * Create an event interpreter according to a specification. - * - * The specification contains information about what to do with events. Typically, it will - * contain information about the type of keyboards - for example, if hardware keyboard(s) is/are - * attached, their type will be included here so that the decoder knows what to do with each - * keypress (a 10-key keyboard is not handled like a qwerty-ish keyboard). - * It also contains information for combining characters. For example, if the input language - * is Japanese, the specification will typically request kana conversion. - * Also note that the specification can be null. This means that we need to create a default - * interpreter that does no specific combining, and assumes the most common cases. - * - * @param specification the specification for event interpretation. null for default. - * @param latinIme a reference to the ime. - */ - public EventInterpreter(final EventDecoderSpec specification, final LatinIME latinIme) { - mDecoderSpec = null != specification ? specification : new EventDecoderSpec(); - // For both, we expect to have only one decoder in almost all cases, hence the default - // capacity of 1. - mHardwareEventDecoders = new SparseArray<HardwareEventDecoder>(1); - mSoftwareEventDecoder = new SoftwareKeyboardEventDecoder(); - mCombiners = CollectionUtils.newArrayList(); - mCombiners.add(new DeadKeyCombiner()); - mLatinIme = latinIme; - } - - // Helper method to decode a hardware key event into a generic event, and execute any - // necessary action. - public boolean onHardwareKeyEvent(final KeyEvent hardwareKeyEvent) { - final Event decodedEvent = getHardwareKeyEventDecoder(hardwareKeyEvent.getDeviceId()) - .decodeHardwareKey(hardwareKeyEvent); - return onEvent(decodedEvent); - } - - public boolean onSoftwareEvent() { - final Event decodedEvent = getSoftwareEventDecoder().decodeSoftwareEvent(); - return onEvent(decodedEvent); - } - - private HardwareEventDecoder getHardwareKeyEventDecoder(final int deviceId) { - final HardwareEventDecoder decoder = mHardwareEventDecoders.get(deviceId); - if (null != decoder) return decoder; - // TODO: create the decoder according to the specification - final HardwareEventDecoder newDecoder = new HardwareKeyboardEventDecoder(deviceId); - mHardwareEventDecoders.put(deviceId, newDecoder); - return newDecoder; - } - - private SoftwareEventDecoder getSoftwareEventDecoder() { - // Within the context of Latin IME, since we never present several software interfaces - // at the time, we should never need multiple software event decoders at a time. - return mSoftwareEventDecoder; - } - - private boolean onEvent(final Event event) { - Event currentlyProcessingEvent = event; - boolean processed = false; - for (int i = 0; i < mCombiners.size(); ++i) { - currentlyProcessingEvent = mCombiners.get(i).combine(event); - } - while (null != currentlyProcessingEvent) { - if (currentlyProcessingEvent.isCommittable()) { - mLatinIme.onCodeInput(currentlyProcessingEvent.mCodePoint, - Constants.EXTERNAL_KEYBOARD_COORDINATE, - Constants.EXTERNAL_KEYBOARD_COORDINATE); - processed = true; - } else if (event.isDead()) { - processed = true; - } - currentlyProcessingEvent = currentlyProcessingEvent.mNextEvent; - } - return processed; - } -} |