158 lines
5.1 KiB
Java
158 lines
5.1 KiB
Java
|
/*
|
||
|
* Copyright (C) 2013 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.keyboard.internal;
|
||
|
|
||
|
import android.text.TextUtils;
|
||
|
|
||
|
import com.android.inputmethod.keyboard.Key;
|
||
|
import com.android.inputmethod.keyboard.Keyboard;
|
||
|
import com.android.inputmethod.latin.utils.CollectionUtils;
|
||
|
|
||
|
import java.util.ArrayDeque;
|
||
|
import java.util.Random;
|
||
|
|
||
|
/**
|
||
|
* This is a Keyboard class to host recently used keys.
|
||
|
*/
|
||
|
// TODO: Save/restore recent keys from/to preferences.
|
||
|
public class RecentsKeyboard extends Keyboard {
|
||
|
private static final int TEMPLATE_KEY_CODE_0 = 0x30;
|
||
|
private static final int TEMPLATE_KEY_CODE_1 = 0x31;
|
||
|
|
||
|
private final int mLeftPadding;
|
||
|
private final int mHorizontalStep;
|
||
|
private final int mVerticalStep;
|
||
|
private final int mColumnsNum;
|
||
|
private final int mMaxRecentKeyCount;
|
||
|
private final ArrayDeque<RecentKey> mRecentKeys = CollectionUtils.newArrayDeque();
|
||
|
|
||
|
private Key[] mCachedRecentKeys;
|
||
|
|
||
|
public RecentsKeyboard(final Keyboard templateKeyboard) {
|
||
|
super(templateKeyboard);
|
||
|
final Key key0 = getTemplateKey(TEMPLATE_KEY_CODE_0);
|
||
|
final Key key1 = getTemplateKey(TEMPLATE_KEY_CODE_1);
|
||
|
mLeftPadding = key0.getX();
|
||
|
mHorizontalStep = Math.abs(key1.getX() - key0.getX());
|
||
|
mVerticalStep = key0.getHeight() + mVerticalGap;
|
||
|
mColumnsNum = mBaseWidth / mHorizontalStep;
|
||
|
final int rowsNum = mBaseHeight / mVerticalStep;
|
||
|
mMaxRecentKeyCount = mColumnsNum * rowsNum;
|
||
|
}
|
||
|
|
||
|
private Key getTemplateKey(final int code) {
|
||
|
for (final Key key : super.getKeys()) {
|
||
|
if (key.getCode() == code) {
|
||
|
return key;
|
||
|
}
|
||
|
}
|
||
|
throw new RuntimeException("Can't find template key: code=" + code);
|
||
|
}
|
||
|
|
||
|
private final Random random = new Random();
|
||
|
|
||
|
public void addRecentKey(final Key usedKey) {
|
||
|
synchronized (mRecentKeys) {
|
||
|
mCachedRecentKeys = null;
|
||
|
final RecentKey key = (usedKey instanceof RecentKey)
|
||
|
? (RecentKey)usedKey : new RecentKey(usedKey);
|
||
|
while (mRecentKeys.remove(key)) {
|
||
|
// Remove duplicate keys.
|
||
|
}
|
||
|
mRecentKeys.addFirst(key);
|
||
|
while (mRecentKeys.size() > mMaxRecentKeyCount) {
|
||
|
mRecentKeys.removeLast();
|
||
|
}
|
||
|
int index = 0;
|
||
|
for (final RecentKey recentKey : mRecentKeys) {
|
||
|
final int keyX = getKeyX(index);
|
||
|
final int keyY = getKeyY(index);
|
||
|
final int x = keyX+random.nextInt(recentKey.getWidth());
|
||
|
final int y = keyY+random.nextInt(recentKey.getHeight());
|
||
|
recentKey.updateCorrdinates(keyX, keyY);
|
||
|
index++;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
private int getKeyX(final int index) {
|
||
|
final int column = index % mColumnsNum;
|
||
|
return column * mHorizontalStep + mLeftPadding;
|
||
|
}
|
||
|
|
||
|
private int getKeyY(final int index) {
|
||
|
final int row = index / mColumnsNum;
|
||
|
return row * mVerticalStep + mTopPadding;
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public Key[] getKeys() {
|
||
|
synchronized (mRecentKeys) {
|
||
|
if (mCachedRecentKeys != null) {
|
||
|
return mCachedRecentKeys;
|
||
|
}
|
||
|
mCachedRecentKeys = mRecentKeys.toArray(new Key[mRecentKeys.size()]);
|
||
|
return mCachedRecentKeys;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public Key[] getNearestKeys(final int x, final int y) {
|
||
|
// TODO: Calculate the nearest key index in mRecentKeys from x and y.
|
||
|
return getKeys();
|
||
|
}
|
||
|
|
||
|
static final class RecentKey extends Key {
|
||
|
private int mCurrentX;
|
||
|
private int mCurrentY;
|
||
|
|
||
|
public RecentKey(final Key originalKey) {
|
||
|
super(originalKey);
|
||
|
}
|
||
|
|
||
|
public void updateCorrdinates(final int x, final int y) {
|
||
|
mCurrentX = x;
|
||
|
mCurrentY = y;
|
||
|
getHitBox().offsetTo(x, y);
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public int getX() {
|
||
|
return mCurrentX;
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public int getY() {
|
||
|
return mCurrentY;
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public boolean equals(final Object o) {
|
||
|
if (!(o instanceof Key)) return false;
|
||
|
final Key key = (Key)o;
|
||
|
if (getCode() != key.getCode()) return false;
|
||
|
if (!TextUtils.equals(getLabel(), key.getLabel())) return false;
|
||
|
return TextUtils.equals(getOutputText(), key.getOutputText());
|
||
|
}
|
||
|
|
||
|
@Override
|
||
|
public String toString() {
|
||
|
return "RecentKey: " + super.toString();
|
||
|
}
|
||
|
}
|
||
|
}
|