PasswordEntryKeyboardHelper.java revision 8171b5182f5f07d33c9dfdf2dd8f0f6ae9588039 
1/*
2 * Copyright (C) 2010 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * 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, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package com.android.internal.widget;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.inputmethodservice.Keyboard;
22import android.inputmethodservice.KeyboardView;
23import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;
24import android.os.Handler;
25import android.os.SystemClock;
26import android.os.Vibrator;
27import android.provider.Settings;
28import android.util.Log;
29import android.view.KeyCharacterMap;
30import android.view.KeyEvent;
31import android.view.View;
32import android.view.ViewRoot;
33import com.android.internal.R;
34
35public class PasswordEntryKeyboardHelper implements OnKeyboardActionListener {
36
37    public static final int KEYBOARD_MODE_ALPHA = 0;
38    public static final int KEYBOARD_MODE_NUMERIC = 1;
39    private static final int KEYBOARD_STATE_NORMAL = 0;
40    private static final int KEYBOARD_STATE_SHIFTED = 1;
41    private static final int KEYBOARD_STATE_CAPSLOCK = 2;
42    private static final String TAG = "PasswordEntryKeyboardHelper";
43    private int mKeyboardMode = KEYBOARD_MODE_ALPHA;
44    private int mKeyboardState = KEYBOARD_STATE_NORMAL;
45    private PasswordEntryKeyboard mQwertyKeyboard;
46    private PasswordEntryKeyboard mQwertyKeyboardShifted;
47    private PasswordEntryKeyboard mSymbolsKeyboard;
48    private PasswordEntryKeyboard mSymbolsKeyboardShifted;
49    private PasswordEntryKeyboard mNumericKeyboard;
50    private Context mContext;
51    private View mTargetView;
52    private KeyboardView mKeyboardView;
53    private long[] mVibratePattern;
54    private Vibrator mVibrator;
55
56    public PasswordEntryKeyboardHelper(Context context, KeyboardView keyboardView, View targetView) {
57        this(context, keyboardView, targetView, true);
58    }
59
60    public PasswordEntryKeyboardHelper(Context context, KeyboardView keyboardView, View targetView,
61            boolean useFullScreenWidth) {
62        mContext = context;
63        mTargetView = targetView;
64        mKeyboardView = keyboardView;
65        if (useFullScreenWidth || mKeyboardView.getLayoutParams().width == -1) {
66            createKeyboards();
67        } else {
68            createKeyboardsWithSpecificSize(mKeyboardView.getLayoutParams().width,
69                    mKeyboardView.getLayoutParams().height);
70        }
71        mKeyboardView.setOnKeyboardActionListener(this);
72        mVibrator = new Vibrator();
73    }
74
75    public boolean isAlpha() {
76        return mKeyboardMode == KEYBOARD_MODE_ALPHA;
77    }
78
79    private void createKeyboardsWithSpecificSize(int viewWidth, int viewHeight) {
80        mNumericKeyboard = new PasswordEntryKeyboard(mContext, R.xml.password_kbd_numeric,
81                viewWidth, viewHeight);
82        mQwertyKeyboard = new PasswordEntryKeyboard(mContext,
83                R.xml.password_kbd_qwerty, R.id.mode_normal, viewWidth, viewHeight);
84        mQwertyKeyboard.enableShiftLock();
85
86        mQwertyKeyboardShifted = new PasswordEntryKeyboard(mContext,
87                R.xml.password_kbd_qwerty_shifted,
88                R.id.mode_normal, viewWidth, viewHeight);
89        mQwertyKeyboardShifted.enableShiftLock();
90        mQwertyKeyboardShifted.setShifted(true); // always shifted.
91
92        mSymbolsKeyboard = new PasswordEntryKeyboard(mContext, R.xml.password_kbd_symbols,
93                viewWidth, viewHeight);
94        mSymbolsKeyboard.enableShiftLock();
95
96        mSymbolsKeyboardShifted = new PasswordEntryKeyboard(mContext,
97                R.xml.password_kbd_symbols_shift, viewWidth, viewHeight);
98        mSymbolsKeyboardShifted.enableShiftLock();
99        mSymbolsKeyboardShifted.setShifted(true); // always shifted
100    }
101
102    private void createKeyboards() {
103        mNumericKeyboard = new PasswordEntryKeyboard(mContext, R.xml.password_kbd_numeric);
104        mQwertyKeyboard = new PasswordEntryKeyboard(mContext,
105                R.xml.password_kbd_qwerty, R.id.mode_normal);
106        mQwertyKeyboard.enableShiftLock();
107
108        mQwertyKeyboardShifted = new PasswordEntryKeyboard(mContext,
109                R.xml.password_kbd_qwerty_shifted,
110                R.id.mode_normal);
111        mQwertyKeyboardShifted.enableShiftLock();
112        mQwertyKeyboardShifted.setShifted(true); // always shifted.
113
114        mSymbolsKeyboard = new PasswordEntryKeyboard(mContext, R.xml.password_kbd_symbols);
115        mSymbolsKeyboard.enableShiftLock();
116
117        mSymbolsKeyboardShifted = new PasswordEntryKeyboard(mContext,
118                R.xml.password_kbd_symbols_shift);
119        mSymbolsKeyboardShifted.enableShiftLock();
120        mSymbolsKeyboardShifted.setShifted(true); // always shifted
121    }
122
123    public void setKeyboardMode(int mode) {
124        switch (mode) {
125            case KEYBOARD_MODE_ALPHA:
126                mKeyboardView.setKeyboard(mQwertyKeyboard);
127                mKeyboardState = KEYBOARD_STATE_NORMAL;
128                final boolean visiblePassword = Settings.System.getInt(
129                        mContext.getContentResolver(),
130                        Settings.System.TEXT_SHOW_PASSWORD, 1) != 0;
131                mKeyboardView.setPreviewEnabled(visiblePassword);
132                break;
133            case KEYBOARD_MODE_NUMERIC:
134                mKeyboardView.setKeyboard(mNumericKeyboard);
135                mKeyboardState = KEYBOARD_STATE_NORMAL;
136                mKeyboardView.setPreviewEnabled(false); // never show popup for numeric keypad
137                break;
138        }
139        mKeyboardMode = mode;
140    }
141
142    private void sendKeyEventsToTarget(int character) {
143        Handler handler = mTargetView.getHandler();
144        KeyEvent[] events = KeyCharacterMap.load(KeyCharacterMap.ALPHA).getEvents(
145                new char[] { (char) character });
146        if (events != null) {
147            final int N = events.length;
148            for (int i=0; i<N; i++) {
149                KeyEvent event = events[i];
150                event = KeyEvent.changeFlags(event, event.getFlags()
151                        | KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE);
152                handler.sendMessage(handler.obtainMessage(ViewRoot.DISPATCH_KEY, event));
153            }
154        }
155    }
156
157    public void sendDownUpKeyEvents(int keyEventCode) {
158        long eventTime = SystemClock.uptimeMillis();
159        Handler handler = mTargetView.getHandler();
160        handler.sendMessage(handler.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
161                new KeyEvent(eventTime, eventTime, KeyEvent.ACTION_DOWN, keyEventCode, 0, 0, 0, 0,
162                    KeyEvent.FLAG_SOFT_KEYBOARD|KeyEvent.FLAG_KEEP_TOUCH_MODE)));
163        handler.sendMessage(handler.obtainMessage(ViewRoot.DISPATCH_KEY_FROM_IME,
164                new KeyEvent(eventTime, eventTime, KeyEvent.ACTION_UP, keyEventCode, 0, 0, 0, 0,
165                        KeyEvent.FLAG_SOFT_KEYBOARD|KeyEvent.FLAG_KEEP_TOUCH_MODE)));
166    }
167
168    public void onKey(int primaryCode, int[] keyCodes) {
169        if (primaryCode == Keyboard.KEYCODE_DELETE) {
170            handleBackspace();
171        } else if (primaryCode == Keyboard.KEYCODE_SHIFT) {
172            handleShift();
173        } else if (primaryCode == Keyboard.KEYCODE_CANCEL) {
174            handleClose();
175            return;
176        } else if (primaryCode == Keyboard.KEYCODE_MODE_CHANGE && mKeyboardView != null) {
177            handleModeChange();
178        } else {
179            handleCharacter(primaryCode, keyCodes);
180            // Switch back to old keyboard if we're not in capslock mode
181            if (mKeyboardState == KEYBOARD_STATE_SHIFTED) {
182                // skip to the unlocked state
183                mKeyboardState = KEYBOARD_STATE_CAPSLOCK;
184                handleShift();
185            }
186        }
187    }
188
189    /**
190     * Sets and enables vibrate pattern.  If id is 0 (or can't be loaded), vibrate is disabled.
191     * @param id resource id for array containing vibrate pattern.
192     */
193    public void setVibratePattern(int id) {
194        int[] tmpArray = null;
195        try {
196            tmpArray = mContext.getResources().getIntArray(id);
197        } catch (Resources.NotFoundException e) {
198            if (id != 0) {
199                Log.e(TAG, "Vibrate pattern missing", e);
200            }
201        }
202        if (tmpArray == null) {
203            mVibratePattern = null;
204            return;
205        }
206        mVibratePattern = new long[tmpArray.length];
207        for (int i = 0; i < tmpArray.length; i++) {
208            mVibratePattern[i] = tmpArray[i];
209        }
210    }
211
212    private void handleModeChange() {
213        final Keyboard current = mKeyboardView.getKeyboard();
214        Keyboard next = null;
215        if (current == mQwertyKeyboard || current == mQwertyKeyboardShifted) {
216            next = mSymbolsKeyboard;
217        } else if (current == mSymbolsKeyboard || current == mSymbolsKeyboardShifted) {
218            next = mQwertyKeyboard;
219        }
220        if (next != null) {
221            mKeyboardView.setKeyboard(next);
222            mKeyboardState = KEYBOARD_STATE_NORMAL;
223        }
224    }
225
226    private void handleBackspace() {
227        sendDownUpKeyEvents(KeyEvent.KEYCODE_DEL);
228    }
229
230    private void handleShift() {
231        if (mKeyboardView == null) {
232            return;
233        }
234        Keyboard current = mKeyboardView.getKeyboard();
235        PasswordEntryKeyboard next = null;
236        final boolean isAlphaMode = current == mQwertyKeyboard
237                || current == mQwertyKeyboardShifted;
238        if (mKeyboardState == KEYBOARD_STATE_NORMAL) {
239            mKeyboardState = isAlphaMode ? KEYBOARD_STATE_SHIFTED : KEYBOARD_STATE_CAPSLOCK;
240            next = isAlphaMode ? mQwertyKeyboardShifted : mSymbolsKeyboardShifted;
241        } else if (mKeyboardState == KEYBOARD_STATE_SHIFTED) {
242            mKeyboardState = KEYBOARD_STATE_CAPSLOCK;
243            next = isAlphaMode ? mQwertyKeyboardShifted : mSymbolsKeyboardShifted;
244        } else if (mKeyboardState == KEYBOARD_STATE_CAPSLOCK) {
245            mKeyboardState = KEYBOARD_STATE_NORMAL;
246            next = isAlphaMode ? mQwertyKeyboard : mSymbolsKeyboard;
247        }
248        if (next != null) {
249            if (next != current) {
250                mKeyboardView.setKeyboard(next);
251            }
252            next.setShiftLocked(mKeyboardState == KEYBOARD_STATE_CAPSLOCK);
253            mKeyboardView.setShifted(mKeyboardState != KEYBOARD_STATE_NORMAL);
254        }
255    }
256
257    private void handleCharacter(int primaryCode, int[] keyCodes) {
258        // Maybe turn off shift if not in capslock mode.
259        if (mKeyboardView.isShifted() && primaryCode != ' ' && primaryCode != '\n') {
260            primaryCode = Character.toUpperCase(primaryCode);
261        }
262        sendKeyEventsToTarget(primaryCode);
263    }
264
265    private void handleClose() {
266
267    }
268
269    public void onPress(int primaryCode) {
270        if (mVibratePattern != null) {
271            mVibrator.vibrate(mVibratePattern, -1);
272        }
273    }
274
275    public void onRelease(int primaryCode) {
276
277    }
278
279    public void onText(CharSequence text) {
280
281    }
282
283    public void swipeDown() {
284
285    }
286
287    public void swipeLeft() {
288
289    }
290
291    public void swipeRight() {
292
293    }
294
295    public void swipeUp() {
296
297    }
298};
299