| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.policy.impl.keyguard; |
| |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.media.AudioManager; |
| import android.provider.Settings; |
| import android.view.View; |
| import android.view.View.AccessibilityDelegate; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| |
| import com.android.internal.R; |
| |
| /** |
| * Accessibility delegate that obscures speech for a view when the user has |
| * not turned on the "speak passwords" preference and is not listening |
| * through headphones. |
| */ |
| class ObscureSpeechDelegate extends AccessibilityDelegate { |
| /** Whether any client has announced the "headset" notification. */ |
| static boolean sAnnouncedHeadset = false; |
| |
| private final ContentResolver mContentResolver; |
| private final AudioManager mAudioManager; |
| |
| public ObscureSpeechDelegate(Context context) { |
| mContentResolver = context.getContentResolver(); |
| mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); |
| } |
| |
| @Override |
| public void sendAccessibilityEvent(View host, int eventType) { |
| super.sendAccessibilityEvent(host, eventType); |
| |
| // Play the "headset required" announcement the first time the user |
| // places accessibility focus on a key. |
| if ((eventType == AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED) |
| && !sAnnouncedHeadset && shouldObscureSpeech()) { |
| sAnnouncedHeadset = true; |
| host.announceForAccessibility(host.getContext().getString( |
| R.string.keyboard_headset_required_to_hear_password)); |
| } |
| } |
| |
| @Override |
| public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { |
| super.onPopulateAccessibilityEvent(host, event); |
| |
| if ((event.getEventType() != AccessibilityEvent.TYPE_ANNOUNCEMENT) |
| && shouldObscureSpeech()) { |
| event.getText().clear(); |
| event.setContentDescription(host.getContext().getString( |
| R.string.keyboard_password_character_no_headset)); |
| } |
| } |
| |
| @Override |
| public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfo(host, info); |
| |
| if (shouldObscureSpeech()) { |
| final Context ctx = host.getContext(); |
| info.setText(null); |
| info.setContentDescription( |
| ctx.getString(R.string.keyboard_password_character_no_headset)); |
| } |
| } |
| |
| @SuppressWarnings("deprecation") |
| private boolean shouldObscureSpeech() { |
| // The user can optionally force speaking passwords. |
| if (Settings.Secure.getInt(mContentResolver, |
| Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD, 0) != 0) { |
| return false; |
| } |
| |
| // Always speak if the user is listening through headphones. |
| if (mAudioManager.isWiredHeadsetOn() || mAudioManager.isBluetoothA2dpOn()) { |
| return false; |
| } |
| |
| // Don't speak since this key is used to type a password. |
| return true; |
| } |
| } |