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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.TextUtils;
24import android.text.TextWatcher;
25import android.text.method.TextKeyListener;
26import android.util.AttributeSet;
27import android.view.KeyEvent;
28import android.view.View;
29import android.view.animation.AnimationUtils;
30import android.view.animation.Interpolator;
31import android.view.inputmethod.EditorInfo;
32import android.view.inputmethod.InputMethodInfo;
33import android.view.inputmethod.InputMethodManager;
34import android.view.inputmethod.InputMethodSubtype;
35import android.widget.TextView;
36import android.widget.TextView.OnEditorActionListener;
37
38import com.android.internal.widget.TextViewInputDisabler;
39
40import java.util.List;
41/**
42 * Displays an alphanumeric (latin-1) key entry for the user to enter
43 * an unlock password
44 */
45
46public class KeyguardPasswordView extends KeyguardAbsKeyInputView
47        implements KeyguardSecurityView, OnEditorActionListener, TextWatcher {
48
49    private final boolean mShowImeAtScreenOn;
50    private final int mDisappearYTranslation;
51
52    InputMethodManager mImm;
53    private TextView mPasswordEntry;
54    private TextViewInputDisabler mPasswordEntryDisabler;
55
56    private Interpolator mLinearOutSlowInInterpolator;
57    private Interpolator mFastOutLinearInInterpolator;
58
59    public KeyguardPasswordView(Context context) {
60        this(context, null);
61    }
62
63    public KeyguardPasswordView(Context context, AttributeSet attrs) {
64        super(context, attrs);
65        mShowImeAtScreenOn = context.getResources().
66                getBoolean(R.bool.kg_show_ime_at_screen_on);
67        mDisappearYTranslation = getResources().getDimensionPixelSize(
68                R.dimen.disappear_y_translation);
69        mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(
70                context, android.R.interpolator.linear_out_slow_in);
71        mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(
72                context, android.R.interpolator.fast_out_linear_in);
73    }
74
75    @Override
76    protected void resetState() {
77        mSecurityMessageDisplay.setMessage(R.string.kg_password_instructions, false);
78        final boolean wasDisabled = mPasswordEntry.isEnabled();
79        setPasswordEntryEnabled(true);
80        setPasswordEntryInputEnabled(true);
81        if (wasDisabled) {
82            mImm.showSoftInput(mPasswordEntry, InputMethodManager.SHOW_IMPLICIT);
83        }
84    }
85
86    @Override
87    protected int getPasswordTextViewId() {
88        return R.id.passwordEntry;
89    }
90
91    @Override
92    public boolean needsInput() {
93        return true;
94    }
95
96    @Override
97    public void onResume(final int reason) {
98        super.onResume(reason);
99
100        // Wait a bit to focus the field so the focusable flag on the window is already set then.
101        post(new Runnable() {
102            @Override
103            public void run() {
104                if (isShown() && mPasswordEntry.isEnabled()) {
105                    mPasswordEntry.requestFocus();
106                    if (reason != KeyguardSecurityView.SCREEN_ON || mShowImeAtScreenOn) {
107                        mImm.showSoftInput(mPasswordEntry, InputMethodManager.SHOW_IMPLICIT);
108                    }
109                }
110            }
111        });
112    }
113
114    @Override
115    protected int getPromtReasonStringRes(int reason) {
116        switch (reason) {
117            case PROMPT_REASON_RESTART:
118                return R.string.kg_prompt_reason_restart_password;
119            case PROMPT_REASON_TIMEOUT:
120                return R.string.kg_prompt_reason_timeout_password;
121            case PROMPT_REASON_DEVICE_ADMIN:
122                return R.string.kg_prompt_reason_device_admin;
123            case PROMPT_REASON_USER_REQUEST:
124                return R.string.kg_prompt_reason_user_request;
125            case PROMPT_REASON_NONE:
126                return 0;
127            default:
128                return R.string.kg_prompt_reason_timeout_password;
129        }
130    }
131
132    @Override
133    public void onPause() {
134        super.onPause();
135        mImm.hideSoftInputFromWindow(getWindowToken(), 0);
136    }
137
138    @Override
139    public void reset() {
140        super.reset();
141        mPasswordEntry.requestFocus();
142    }
143
144    @Override
145    protected void onFinishInflate() {
146        super.onFinishInflate();
147
148        boolean imeOrDeleteButtonVisible = false;
149
150        mImm = (InputMethodManager) getContext().getSystemService(
151                Context.INPUT_METHOD_SERVICE);
152
153        mPasswordEntry = (TextView) findViewById(getPasswordTextViewId());
154        mPasswordEntryDisabler = new TextViewInputDisabler(mPasswordEntry);
155        mPasswordEntry.setKeyListener(TextKeyListener.getInstance());
156        mPasswordEntry.setInputType(InputType.TYPE_CLASS_TEXT
157                | InputType.TYPE_TEXT_VARIATION_PASSWORD);
158        mPasswordEntry.setOnEditorActionListener(this);
159        mPasswordEntry.addTextChangedListener(this);
160
161        // Poke the wakelock any time the text is selected or modified
162        mPasswordEntry.setOnClickListener(new OnClickListener() {
163            @Override
164            public void onClick(View v) {
165                mCallback.userActivity();
166            }
167        });
168
169        // Set selected property on so the view can send accessibility events.
170        mPasswordEntry.setSelected(true);
171
172        mPasswordEntry.requestFocus();
173
174        // If there's more than one IME, enable the IME switcher button
175        View switchImeButton = findViewById(R.id.switch_ime_button);
176        if (switchImeButton != null && hasMultipleEnabledIMEsOrSubtypes(mImm, false)) {
177            switchImeButton.setVisibility(View.VISIBLE);
178            imeOrDeleteButtonVisible = true;
179            switchImeButton.setOnClickListener(new OnClickListener() {
180                @Override
181                public void onClick(View v) {
182                    mCallback.userActivity(); // Leave the screen on a bit longer
183                    // Do not show auxiliary subtypes in password lock screen.
184                    mImm.showInputMethodPicker(false /* showAuxiliarySubtypes */);
185                }
186            });
187        }
188
189        // If no icon is visible, reset the start margin on the password field so the text is
190        // still centered.
191        if (!imeOrDeleteButtonVisible) {
192            android.view.ViewGroup.LayoutParams params = mPasswordEntry.getLayoutParams();
193            if (params instanceof MarginLayoutParams) {
194                final MarginLayoutParams mlp = (MarginLayoutParams) params;
195                mlp.setMarginStart(0);
196                mPasswordEntry.setLayoutParams(params);
197            }
198        }
199    }
200
201    @Override
202    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
203        // send focus to the password field
204        return mPasswordEntry.requestFocus(direction, previouslyFocusedRect);
205    }
206
207    @Override
208    protected void resetPasswordText(boolean animate, boolean announce) {
209        mPasswordEntry.setText("");
210    }
211
212    @Override
213    protected String getPasswordText() {
214        return mPasswordEntry.getText().toString();
215    }
216
217    @Override
218    protected void setPasswordEntryEnabled(boolean enabled) {
219        mPasswordEntry.setEnabled(enabled);
220    }
221
222    @Override
223    protected void setPasswordEntryInputEnabled(boolean enabled) {
224        mPasswordEntryDisabler.setInputEnabled(enabled);
225    }
226
227    /**
228     * Method adapted from com.android.inputmethod.latin.Utils
229     *
230     * @param imm The input method manager
231     * @param shouldIncludeAuxiliarySubtypes
232     * @return true if we have multiple IMEs to choose from
233     */
234    private boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManager imm,
235            final boolean shouldIncludeAuxiliarySubtypes) {
236        final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
237
238        // Number of the filtered IMEs
239        int filteredImisCount = 0;
240
241        for (InputMethodInfo imi : enabledImis) {
242            // We can return true immediately after we find two or more filtered IMEs.
243            if (filteredImisCount > 1) return true;
244            final List<InputMethodSubtype> subtypes =
245                    imm.getEnabledInputMethodSubtypeList(imi, true);
246            // IMEs that have no subtypes should be counted.
247            if (subtypes.isEmpty()) {
248                ++filteredImisCount;
249                continue;
250            }
251
252            int auxCount = 0;
253            for (InputMethodSubtype subtype : subtypes) {
254                if (subtype.isAuxiliary()) {
255                    ++auxCount;
256                }
257            }
258            final int nonAuxCount = subtypes.size() - auxCount;
259
260            // IMEs that have one or more non-auxiliary subtypes should be counted.
261            // If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
262            // subtypes should be counted as well.
263            if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
264                ++filteredImisCount;
265                continue;
266            }
267        }
268
269        return filteredImisCount > 1
270        // imm.getEnabledInputMethodSubtypeList(null, false) will return the current IME's enabled
271        // input method subtype (The current IME should be LatinIME.)
272                || imm.getEnabledInputMethodSubtypeList(null, false).size() > 1;
273    }
274
275    @Override
276    public void showUsabilityHint() {
277    }
278
279    @Override
280    public int getWrongPasswordStringId() {
281        return R.string.kg_wrong_password;
282    }
283
284    @Override
285    public void startAppearAnimation() {
286        setAlpha(0f);
287        setTranslationY(0f);
288        animate()
289                .alpha(1)
290                .withLayer()
291                .setDuration(300)
292                .setInterpolator(mLinearOutSlowInInterpolator);
293    }
294
295    @Override
296    public boolean startDisappearAnimation(Runnable finishRunnable) {
297        animate()
298                .alpha(0f)
299                .translationY(mDisappearYTranslation)
300                .setInterpolator(mFastOutLinearInInterpolator)
301                .setDuration(100)
302                .withEndAction(finishRunnable);
303        return true;
304    }
305
306    @Override
307    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
308        if (mCallback != null) {
309            mCallback.userActivity();
310        }
311    }
312
313    @Override
314    public void onTextChanged(CharSequence s, int start, int before, int count) {
315    }
316
317    @Override
318    public void afterTextChanged(Editable s) {
319        // Poor man's user edit detection, assuming empty text is programmatic and everything else
320        // is from the user.
321        if (!TextUtils.isEmpty(s)) {
322            onUserInput();
323        }
324    }
325
326    @Override
327    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
328        // Check if this was the result of hitting the enter key
329        final boolean isSoftImeEvent = event == null
330                && (actionId == EditorInfo.IME_NULL
331                || actionId == EditorInfo.IME_ACTION_DONE
332                || actionId == EditorInfo.IME_ACTION_NEXT);
333        final boolean isKeyboardEnterKey = event != null
334                && KeyEvent.isConfirmKey(event.getKeyCode())
335                && event.getAction() == KeyEvent.ACTION_DOWN;
336        if (isSoftImeEvent || isKeyboardEnterKey) {
337            verifyPasswordAndUnlock();
338            return true;
339        }
340        return false;
341    }
342}
343