1 /* 2 * Copyright (C) 2009 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.pinyin; 18 19 import android.view.KeyEvent; 20 import android.view.inputmethod.InputConnection; 21 22 /** 23 * Class to handle English input. 24 */ 25 public class EnglishInputProcessor { 26 27 private int mLastKeyCode = KeyEvent.KEYCODE_UNKNOWN; 28 processKey(InputConnection inputContext, KeyEvent event, boolean upperCase, boolean realAction)29 public boolean processKey(InputConnection inputContext, KeyEvent event, 30 boolean upperCase, boolean realAction) { 31 if (null == inputContext || null == event) return false; 32 33 int keyCode = event.getKeyCode(); 34 35 CharSequence prefix = null; 36 prefix = inputContext.getTextBeforeCursor(2, 0); 37 38 int keyChar; 39 keyChar = 0; 40 if (keyCode >= KeyEvent.KEYCODE_A && keyCode <= KeyEvent.KEYCODE_Z) { 41 keyChar = keyCode - KeyEvent.KEYCODE_A + 'a'; 42 if (upperCase) { 43 keyChar = keyChar + 'A' - 'a'; 44 } 45 } else if (keyCode >= KeyEvent.KEYCODE_0 46 && keyCode <= KeyEvent.KEYCODE_9) 47 keyChar = keyCode - KeyEvent.KEYCODE_0 + '0'; 48 else if (keyCode == KeyEvent.KEYCODE_COMMA) 49 keyChar = ','; 50 else if (keyCode == KeyEvent.KEYCODE_PERIOD) 51 keyChar = '.'; 52 else if (keyCode == KeyEvent.KEYCODE_APOSTROPHE) 53 keyChar = '\''; 54 else if (keyCode == KeyEvent.KEYCODE_AT) 55 keyChar = '@'; 56 else if (keyCode == KeyEvent.KEYCODE_SLASH) keyChar = '/'; 57 58 if (0 == keyChar) { 59 mLastKeyCode = keyCode; 60 61 String insert = null; 62 if (KeyEvent.KEYCODE_DEL == keyCode) { 63 if (realAction) { 64 inputContext.deleteSurroundingText(1, 0); 65 } 66 } else if (KeyEvent.KEYCODE_ENTER == keyCode) { 67 insert = "\n"; 68 } else if (KeyEvent.KEYCODE_SPACE == keyCode) { 69 insert = " "; 70 } else { 71 return false; 72 } 73 74 if (null != insert && realAction) 75 inputContext.commitText(insert, insert.length()); 76 77 return true; 78 } 79 80 if (!realAction) 81 return true; 82 83 if (KeyEvent.KEYCODE_SHIFT_LEFT == mLastKeyCode 84 || KeyEvent.KEYCODE_SHIFT_LEFT == mLastKeyCode) { 85 if (keyChar >= 'a' && keyChar <= 'z') 86 keyChar = keyChar - 'a' + 'A'; 87 } else if (KeyEvent.KEYCODE_ALT_LEFT == mLastKeyCode) { 88 } 89 90 String result = String.valueOf((char) keyChar); 91 inputContext.commitText(result, result.length()); 92 mLastKeyCode = keyCode; 93 return true; 94 } 95 } 96