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 17 package com.android.inputmethod.keyboard.internal; 18 19 public final class TypingTimeRecorder { 20 private final int mStaticTimeThresholdAfterFastTyping; // msec 21 private final int mSuppressKeyPreviewAfterBatchInputDuration; 22 private long mLastTypingTime; 23 private long mLastLetterTypingTime; 24 private long mLastBatchInputTime; 25 26 public TypingTimeRecorder(final int staticTimeThresholdAfterFastTyping, 27 final int suppressKeyPreviewAfterBatchInputDuration) { 28 mStaticTimeThresholdAfterFastTyping = staticTimeThresholdAfterFastTyping; 29 mSuppressKeyPreviewAfterBatchInputDuration = suppressKeyPreviewAfterBatchInputDuration; 30 } 31 32 public boolean isInFastTyping(final long eventTime) { 33 final long elapsedTimeSinceLastLetterTyping = eventTime - mLastLetterTypingTime; 34 return elapsedTimeSinceLastLetterTyping < mStaticTimeThresholdAfterFastTyping; 35 } 36 37 private boolean wasLastInputTyping() { 38 return mLastTypingTime >= mLastBatchInputTime; 39 } 40 41 public void onCodeInput(final int code, final long eventTime) { 42 // Record the letter typing time when 43 // 1. Letter keys are typed successively without any batch input in between. 44 // 2. A letter key is typed within the threshold time since the last any key typing. 45 // 3. A non-letter key is typed within the threshold time since the last letter key typing. 46 if (Character.isLetter(code)) { 47 if (wasLastInputTyping() 48 || eventTime - mLastTypingTime < mStaticTimeThresholdAfterFastTyping) { 49 mLastLetterTypingTime = eventTime; 50 } 51 } else { 52 if (eventTime - mLastLetterTypingTime < mStaticTimeThresholdAfterFastTyping) { 53 // This non-letter typing should be treated as a part of fast typing. 54 mLastLetterTypingTime = eventTime; 55 } 56 } 57 mLastTypingTime = eventTime; 58 } 59 60 public void onEndBatchInput(final long eventTime) { 61 mLastBatchInputTime = eventTime; 62 } 63 64 public long getLastLetterTypingTime() { 65 return mLastLetterTypingTime; 66 } 67 68 public boolean needsToSuppressKeyPreviewPopup(final long eventTime) { 69 return !wasLastInputTyping() 70 && eventTime - mLastBatchInputTime < mSuppressKeyPreviewAfterBatchInputDuration; 71 } 72 } 73
