1/*
2 * Copyright (C) 2012 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
17package com.android.keyguard;
18
19import android.content.Context;
20import android.graphics.Rect;
21import android.text.Editable;
22import android.text.InputType;
23import android.text.TextWatcher;
24import android.text.method.TextKeyListener;
25import android.util.AttributeSet;
26import android.view.KeyEvent;
27import android.view.View;
28import android.view.animation.AnimationUtils;
29import android.view.animation.Interpolator;
30import android.view.inputmethod.EditorInfo;
31import android.view.inputmethod.InputMethodInfo;
32import android.view.inputmethod.InputMethodManager;
33import android.view.inputmethod.InputMethodSubtype;
34import android.widget.TextView;
35import android.widget.TextView.OnEditorActionListener;
36
37import java.util.List;
38/**
39 * Displays an alphanumeric (latin-1) key entry for the user to enter
40 * an unlock password
41 */
42
43public class KeyguardPasswordView extends KeyguardAbsKeyInputView
44        implements KeyguardSecurityView, OnEditorActionListener, TextWatcher {
45
46    private final boolean mShowImeAtScreenOn;
47    private final int mDisappearYTranslation;
48
49    InputMethodManager mImm;
50    private TextView mPasswordEntry;
51    private Interpolator mLinearOutSlowInInterpolator;
52    private Interpolator mFastOutLinearInInterpolator;
53
54    public KeyguardPasswordView(Context context) {
55        this(context, null);
56    }
57
58    public KeyguardPasswordView(Context context, AttributeSet attrs) {
59        super(context, attrs);
60        mShowImeAtScreenOn = context.getResources().
61                getBoolean(R.bool.kg_show_ime_at_screen_on);
62        mDisappearYTranslation = getResources().getDimensionPixelSize(
63                R.dimen.disappear_y_translation);
64        mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(
65                context, android.R.interpolator.linear_out_slow_in);
66        mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(
67                context, android.R.interpolator.fast_out_linear_in);
68    }
69
70    protected void resetState() {
71        mSecurityMessageDisplay.setMessage(R.string.kg_password_instructions, false);
72        mPasswordEntry.setEnabled(true);
73    }
74
75    @Override
76    protected int getPasswordTextViewId() {
77        return R.id.passwordEntry;
78    }
79
80    @Override
81    public boolean needsInput() {
82        return true;
83    }
84
85    @Override
86    public void onResume(final int reason) {
87        super.onResume(reason);
88
89        // Wait a bit to focus the field so the focusable flag on the window is already set then.
90        post(new Runnable() {
91            @Override
92            public void run() {
93                if (isShown()) {
94                    mPasswordEntry.requestFocus();
95                    if (reason != KeyguardSecurityView.SCREEN_ON || mShowImeAtScreenOn) {
96                        mImm.showSoftInput(mPasswordEntry, InputMethodManager.SHOW_IMPLICIT);
97                    }
98                }
99            }
100        });
101    }
102
103    @Override
104    public void onPause() {
105        super.onPause();
106        mImm.hideSoftInputFromWindow(getWindowToken(), 0);
107    }
108
109    @Override
110    public void reset() {
111        super.reset();
112        mPasswordEntry.requestFocus();
113    }
114
115    @Override
116    protected void onFinishInflate() {
117        super.onFinishInflate();
118
119        boolean imeOrDeleteButtonVisible = false;
120
121        mImm = (InputMethodManager) getContext().getSystemService(
122                Context.INPUT_METHOD_SERVICE);
123
124        mPasswordEntry = (TextView) findViewById(getPasswordTextViewId());
125        mPasswordEntry.setKeyListener(TextKeyListener.getInstance());
126        mPasswordEntry.setInputType(InputType.TYPE_CLASS_TEXT
127                | InputType.TYPE_TEXT_VARIATION_PASSWORD);
128        mPasswordEntry.setOnEditorActionListener(this);
129        mPasswordEntry.addTextChangedListener(this);
130
131        // Poke the wakelock any time the text is selected or modified
132        mPasswordEntry.setOnClickListener(new OnClickListener() {
133            public void onClick(View v) {
134                mCallback.userActivity();
135            }
136        });
137
138        // Set selected property on so the view can send accessibility events.
139        mPasswordEntry.setSelected(true);
140
141        mPasswordEntry.addTextChangedListener(new TextWatcher() {
142            public void onTextChanged(CharSequence s, int start, int before, int count) {
143            }
144
145            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
146            }
147
148            public void afterTextChanged(Editable s) {
149                if (mCallback != null) {
150                    mCallback.userActivity();
151                }
152            }
153        });
154
155        mPasswordEntry.requestFocus();
156
157        // If there's more than one IME, enable the IME switcher button
158        View switchImeButton = findViewById(R.id.switch_ime_button);
159        if (switchImeButton != null && hasMultipleEnabledIMEsOrSubtypes(mImm, false)) {
160            switchImeButton.setVisibility(View.VISIBLE);
161            imeOrDeleteButtonVisible = true;
162            switchImeButton.setOnClickListener(new OnClickListener() {
163                public void onClick(View v) {
164                    mCallback.userActivity(); // Leave the screen on a bit longer
165                    mImm.showInputMethodPicker();
166                }
167            });
168        }
169
170        // If no icon is visible, reset the start margin on the password field so the text is
171        // still centered.
172        if (!imeOrDeleteButtonVisible) {
173            android.view.ViewGroup.LayoutParams params = mPasswordEntry.getLayoutParams();
174            if (params instanceof MarginLayoutParams) {
175                final MarginLayoutParams mlp = (MarginLayoutParams) params;
176                mlp.setMarginStart(0);
177                mPasswordEntry.setLayoutParams(params);
178            }
179        }
180    }
181
182    @Override
183    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
184        // send focus to the password field
185        return mPasswordEntry.requestFocus(direction, previouslyFocusedRect);
186    }
187
188    @Override
189    protected void resetPasswordText(boolean animate) {
190        mPasswordEntry.setText("");
191    }
192
193    @Override
194    protected String getPasswordText() {
195        return mPasswordEntry.getText().toString();
196    }
197
198    @Override
199    protected void setPasswordEntryEnabled(boolean enabled) {
200        mPasswordEntry.setEnabled(enabled);
201    }
202
203    /**
204     * Method adapted from com.android.inputmethod.latin.Utils
205     *
206     * @param imm The input method manager
207     * @param shouldIncludeAuxiliarySubtypes
208     * @return true if we have multiple IMEs to choose from
209     */
210    private boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManager imm,
211            final boolean shouldIncludeAuxiliarySubtypes) {
212        final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
213
214        // Number of the filtered IMEs
215        int filteredImisCount = 0;
216
217        for (InputMethodInfo imi : enabledImis) {
218            // We can return true immediately after we find two or more filtered IMEs.
219            if (filteredImisCount > 1) return true;
220            final List<InputMethodSubtype> subtypes =
221                    imm.getEnabledInputMethodSubtypeList(imi, true);
222            // IMEs that have no subtypes should be counted.
223            if (subtypes.isEmpty()) {
224                ++filteredImisCount;
225                continue;
226            }
227
228            int auxCount = 0;
229            for (InputMethodSubtype subtype : subtypes) {
230                if (subtype.isAuxiliary()) {
231                    ++auxCount;
232                }
233            }
234            final int nonAuxCount = subtypes.size() - auxCount;
235
236            // IMEs that have one or more non-auxiliary subtypes should be counted.
237            // If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
238            // subtypes should be counted as well.
239            if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
240                ++filteredImisCount;
241                continue;
242            }
243        }
244
245        return filteredImisCount > 1
246        // imm.getEnabledInputMethodSubtypeList(null, false) will return the current IME's enabled
247        // input method subtype (The current IME should be LatinIME.)
248                || imm.getEnabledInputMethodSubtypeList(null, false).size() > 1;
249    }
250
251    @Override
252    public void showUsabilityHint() {
253    }
254
255    @Override
256    public int getWrongPasswordStringId() {
257        return R.string.kg_wrong_password;
258    }
259
260    @Override
261    public void startAppearAnimation() {
262        setAlpha(0f);
263        setTranslationY(0f);
264        animate()
265                .alpha(1)
266                .withLayer()
267                .setDuration(300)
268                .setInterpolator(mLinearOutSlowInInterpolator);
269    }
270
271    @Override
272    public boolean startDisappearAnimation(Runnable finishRunnable) {
273        animate()
274                .alpha(0f)
275                .translationY(mDisappearYTranslation)
276                .setInterpolator(mFastOutLinearInInterpolator)
277                .setDuration(100)
278                .withEndAction(finishRunnable);
279        return true;
280    }
281
282    @Override
283    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
284        if (mCallback != null) {
285            mCallback.userActivity();
286        }
287    }
288
289    @Override
290    public void onTextChanged(CharSequence s, int start, int before, int count) {
291    }
292
293    @Override
294    public void afterTextChanged(Editable s) {
295    }
296
297    @Override
298    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
299        // Check if this was the result of hitting the enter key
300        final boolean isSoftImeEvent = event == null
301                && (actionId == EditorInfo.IME_NULL
302                || actionId == EditorInfo.IME_ACTION_DONE
303                || actionId == EditorInfo.IME_ACTION_NEXT);
304        final boolean isKeyboardEnterKey = event != null
305                && KeyEvent.isConfirmKey(event.getKeyCode())
306                && event.getAction() == KeyEvent.ACTION_DOWN;
307        if (isSoftImeEvent || isKeyboardEnterKey) {
308            verifyPasswordAndUnlock();
309            return true;
310        }
311        return false;
312    }
313}
314