| /* |
| * Copyright (C) 2011 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.keyguard; |
| |
| import android.content.Context; |
| import android.content.res.ColorStateList; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.SystemClock; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.widget.TextView; |
| |
| import java.lang.ref.WeakReference; |
| |
| /*** |
| * Manages a number of views inside of the given layout. See below for a list of widgets. |
| */ |
| class KeyguardMessageArea extends TextView implements SecurityMessageDisplay { |
| /** Handler token posted with accessibility announcement runnables. */ |
| private static final Object ANNOUNCE_TOKEN = new Object(); |
| |
| /** |
| * Delay before speaking an accessibility announcement. Used to prevent |
| * lift-to-type from interrupting itself. |
| */ |
| private static final long ANNOUNCEMENT_DELAY = 250; |
| private static final int DEFAULT_COLOR = -1; |
| |
| private final Handler mHandler; |
| private final ColorStateList mDefaultColorState; |
| |
| private CharSequence mMessage; |
| private ColorStateList mNextMessageColorState = ColorStateList.valueOf(DEFAULT_COLOR); |
| |
| private KeyguardUpdateMonitorCallback mInfoCallback = new KeyguardUpdateMonitorCallback() { |
| public void onFinishedGoingToSleep(int why) { |
| setSelected(false); |
| }; |
| public void onStartedWakingUp() { |
| setSelected(true); |
| }; |
| }; |
| |
| public KeyguardMessageArea(Context context) { |
| this(context, null); |
| } |
| |
| public KeyguardMessageArea(Context context, AttributeSet attrs) { |
| this(context, attrs, KeyguardUpdateMonitor.getInstance(context)); |
| } |
| |
| public KeyguardMessageArea(Context context, AttributeSet attrs, KeyguardUpdateMonitor monitor) { |
| super(context, attrs); |
| setLayerType(LAYER_TYPE_HARDWARE, null); // work around nested unclipped SaveLayer bug |
| |
| monitor.registerCallback(mInfoCallback); |
| mHandler = new Handler(Looper.myLooper()); |
| |
| mDefaultColorState = getTextColors(); |
| update(); |
| } |
| |
| @Override |
| public void setNextMessageColor(ColorStateList colorState) { |
| mNextMessageColorState = colorState; |
| } |
| |
| @Override |
| public void setMessage(CharSequence msg) { |
| if (!TextUtils.isEmpty(msg)) { |
| securityMessageChanged(msg); |
| } else { |
| clearMessage(); |
| } |
| } |
| |
| @Override |
| public void setMessage(int resId) { |
| CharSequence message = null; |
| if (resId != 0) { |
| message = getContext().getResources().getText(resId); |
| } |
| setMessage(message); |
| } |
| |
| @Override |
| public void formatMessage(int resId, Object... formatArgs) { |
| CharSequence message = null; |
| if (resId != 0) { |
| message = getContext().getString(resId, formatArgs); |
| } |
| setMessage(message); |
| } |
| |
| public static SecurityMessageDisplay findSecurityMessageDisplay(View v) { |
| KeyguardMessageArea messageArea = (KeyguardMessageArea) v.findViewById( |
| R.id.keyguard_message_area); |
| if (messageArea == null) { |
| throw new RuntimeException("Can't find keyguard_message_area in " + v.getClass()); |
| } |
| return messageArea; |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| boolean shouldMarquee = KeyguardUpdateMonitor.getInstance(mContext).isDeviceInteractive(); |
| setSelected(shouldMarquee); // This is required to ensure marquee works |
| } |
| |
| private void securityMessageChanged(CharSequence message) { |
| mMessage = message; |
| update(); |
| mHandler.removeCallbacksAndMessages(ANNOUNCE_TOKEN); |
| mHandler.postAtTime(new AnnounceRunnable(this, getText()), ANNOUNCE_TOKEN, |
| (SystemClock.uptimeMillis() + ANNOUNCEMENT_DELAY)); |
| } |
| |
| private void clearMessage() { |
| mMessage = null; |
| update(); |
| } |
| |
| private void update() { |
| CharSequence status = mMessage; |
| setVisibility(TextUtils.isEmpty(status) ? INVISIBLE : VISIBLE); |
| setText(status); |
| ColorStateList colorState = mDefaultColorState; |
| if (mNextMessageColorState.getDefaultColor() != DEFAULT_COLOR) { |
| colorState = mNextMessageColorState; |
| mNextMessageColorState = ColorStateList.valueOf(DEFAULT_COLOR); |
| } |
| setTextColor(colorState); |
| } |
| |
| |
| /** |
| * Runnable used to delay accessibility announcements. |
| */ |
| private static class AnnounceRunnable implements Runnable { |
| private final WeakReference<View> mHost; |
| private final CharSequence mTextToAnnounce; |
| |
| AnnounceRunnable(View host, CharSequence textToAnnounce) { |
| mHost = new WeakReference<View>(host); |
| mTextToAnnounce = textToAnnounce; |
| } |
| |
| @Override |
| public void run() { |
| final View host = mHost.get(); |
| if (host != null) { |
| host.announceForAccessibility(mTextToAnnounce); |
| } |
| } |
| } |
| } |