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/*
* 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.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 static final int SECURITY_MESSAGE_DURATION = 5000;
private final KeyguardUpdateMonitor mUpdateMonitor;
private final Handler mHandler;
private final int mDefaultColor;
// Timeout before we reset the message to show charging/owner info
long mTimeout = SECURITY_MESSAGE_DURATION;
CharSequence mMessage;
private int mNextMessageColor = DEFAULT_COLOR;
private final Runnable mClearMessageRunnable = new Runnable() {
@Override
public void run() {
mMessage = null;
update();
}
};
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) {
super(context, attrs);
setLayerType(LAYER_TYPE_HARDWARE, null); // work around nested unclipped SaveLayer bug
mUpdateMonitor = KeyguardUpdateMonitor.getInstance(getContext());
mUpdateMonitor.registerCallback(mInfoCallback);
mHandler = new Handler(Looper.myLooper());
mDefaultColor = getCurrentTextColor();
update();
}
@Override
public void setNextMessageColor(int color) {
mNextMessageColor = color;
}
@Override
public void setMessage(CharSequence msg, boolean important) {
if (!TextUtils.isEmpty(msg) && important) {
securityMessageChanged(msg);
} else {
clearMessage();
}
}
@Override
public void setMessage(int resId, boolean important) {
if (resId != 0 && important) {
CharSequence message = getContext().getResources().getText(resId);
securityMessageChanged(message);
} else {
clearMessage();
}
}
@Override
public void setMessage(int resId, boolean important, Object... formatArgs) {
if (resId != 0 && important) {
String message = getContext().getString(resId, formatArgs);
securityMessageChanged(message);
} else {
clearMessage();
}
}
@Override
public void setTimeout(int timeoutMs) {
mTimeout = timeoutMs;
}
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.removeCallbacks(mClearMessageRunnable);
if (mTimeout > 0) {
mHandler.postDelayed(mClearMessageRunnable, mTimeout);
}
mHandler.removeCallbacksAndMessages(ANNOUNCE_TOKEN);
mHandler.postAtTime(new AnnounceRunnable(this, getText()), ANNOUNCE_TOKEN,
(SystemClock.uptimeMillis() + ANNOUNCEMENT_DELAY));
}
private void clearMessage() {
mHandler.removeCallbacks(mClearMessageRunnable);
mHandler.post(mClearMessageRunnable);
}
private void update() {
CharSequence status = mMessage;
setVisibility(TextUtils.isEmpty(status) ? INVISIBLE : VISIBLE);
setText(status);
int color = mDefaultColor;
if (mNextMessageColor != DEFAULT_COLOR) {
color = mNextMessageColor;
mNextMessageColor = DEFAULT_COLOR;
}
setTextColor(color);
}
/**
* 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);
}
}
}
}
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