Custom message in AoD

Optional message that lives under the clock and also
in AoD. Implemented using a slice.

Test: launch sysui, look at the date in AoD
Test: runtest -x packages/SystemUI/tests/src/com/android/systemui/keyguard/KeyguardSliceProviderTest.java
Change-Id: I9dbc827bd48c6a3d1b25b0a481ffaecc0dd37f25
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardSliceView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardSliceView.java
new file mode 100644
index 0000000..c18f9b6
--- /dev/null
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardSliceView.java
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2017 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.app.PendingIntent;
+import android.app.slice.Slice;
+import android.app.slice.SliceItem;
+import android.app.slice.SliceQuery;
+import android.content.Context;
+import android.database.ContentObserver;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Handler;
+import android.util.AttributeSet;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.android.internal.graphics.ColorUtils;
+import com.android.systemui.R;
+import com.android.systemui.keyguard.KeyguardSliceProvider;
+
+/**
+ * View visible under the clock on the lock screen and AoD.
+ */
+public class KeyguardSliceView extends LinearLayout {
+
+    private final Uri mKeyguardSliceUri;
+    private TextView mTitle;
+    private TextView mText;
+    private Slice mSlice;
+    private PendingIntent mSliceAction;
+    private int mTextColor;
+    private float mDarkAmount = 0;
+
+    private final ContentObserver mObserver;
+
+    public KeyguardSliceView(Context context) {
+        this(context, null, 0);
+    }
+
+    public KeyguardSliceView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public KeyguardSliceView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        mObserver = new KeyguardSliceObserver(new Handler());
+        mKeyguardSliceUri = Uri.parse(KeyguardSliceProvider.KEYGUARD_SLICE_URI);;
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mTitle = findViewById(R.id.title);
+        mText = findViewById(R.id.text);
+        mTextColor = mTitle.getCurrentTextColor();
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        super.onAttachedToWindow();
+
+        // Set initial content
+        showSlice(Slice.bindSlice(getContext().getContentResolver(), mKeyguardSliceUri));
+
+        // Make sure we always have the most current slice
+        getContext().getContentResolver().registerContentObserver(mKeyguardSliceUri,
+                false /* notifyDescendants */, mObserver);
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+
+        getContext().getContentResolver().unregisterContentObserver(mObserver);
+    }
+
+    private void showSlice(Slice slice) {
+        // Items will be wrapped into an action when they have tap targets.
+        SliceItem actionSlice = SliceQuery.find(slice, SliceItem.TYPE_ACTION);
+        if (actionSlice != null) {
+            mSlice = actionSlice.getSlice();
+            mSliceAction = actionSlice.getAction();
+        } else {
+            mSlice = slice;
+            mSliceAction = null;
+        }
+
+        if (mSlice == null) {
+            setVisibility(GONE);
+            return;
+        }
+
+        SliceItem title = SliceQuery.find(mSlice, SliceItem.TYPE_TEXT, Slice.HINT_TITLE, null);
+        if (title == null) {
+            mTitle.setVisibility(GONE);
+        } else {
+            mTitle.setVisibility(VISIBLE);
+            mTitle.setText(title.getText());
+        }
+
+        SliceItem text = SliceQuery.find(mSlice, SliceItem.TYPE_TEXT, null, Slice.HINT_TITLE);
+        if (text == null) {
+            mText.setVisibility(GONE);
+        } else {
+            mText.setVisibility(VISIBLE);
+            mText.setText(text.getText());
+        }
+
+        final int visibility = title == null && text == null ? GONE : VISIBLE;
+        if (visibility != getVisibility()) {
+            setVisibility(visibility);
+        }
+    }
+
+    public void setDark(float darkAmount) {
+        mDarkAmount = darkAmount;
+        updateTextColors();
+    }
+
+    public void setTextColor(int textColor) {
+        mTextColor = textColor;
+    }
+
+    private void updateTextColors() {
+        final int blendedColor = ColorUtils.blendARGB(mTextColor, Color.WHITE, mDarkAmount);
+        mTitle.setTextColor(blendedColor);
+        mText.setTextColor(blendedColor);
+    }
+
+    private class KeyguardSliceObserver extends ContentObserver {
+        KeyguardSliceObserver(Handler handler) {
+            super(handler);
+        }
+
+        @Override
+        public void onChange(boolean selfChange) {
+            this.onChange(selfChange, null);
+        }
+
+        @Override
+        public void onChange(boolean selfChange, Uri uri) {
+            showSlice(Slice.bindSlice(getContext().getContentResolver(), mKeyguardSliceUri));
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java
index bc2a59d..78cf2b9 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java
@@ -19,11 +19,9 @@
 import android.app.ActivityManager;
 import android.app.AlarmManager;
 import android.content.Context;
-import android.content.res.ColorStateList;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.Color;
-import android.graphics.PorterDuff;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.UserHandle;
@@ -42,8 +40,8 @@
 
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.widget.LockPatternUtils;
+import com.android.settingslib.Utils;
 import com.android.systemui.ChargingView;
-import com.android.systemui.statusbar.policy.DateView;
 
 import java.util.Locale;
 
@@ -55,13 +53,11 @@
     private final LockPatternUtils mLockPatternUtils;
     private final AlarmManager mAlarmManager;
 
-    private TextView mAlarmStatusView;
-    private DateView mDateView;
     private TextClock mClockView;
     private TextView mOwnerInfo;
     private ViewGroup mClockContainer;
     private ChargingView mBatteryDoze;
-    private View mKeyguardStatusArea;
+    private KeyguardSliceView mKeyguardSlice;
     private Runnable mPendingMarqueeStart;
     private Handler mHandler;
 
@@ -69,8 +65,6 @@
     private boolean mPulsing;
     private float mDarkAmount = 0;
     private int mTextColor;
-    private int mDateTextColor;
-    private int mAlarmTextColor;
 
     private KeyguardUpdateMonitorCallback mInfoCallback = new KeyguardUpdateMonitorCallback() {
 
@@ -141,7 +135,6 @@
 
     private void setEnableMarqueeImpl(boolean enabled) {
         if (DEBUG) Log.v(TAG, (enabled ? "Enable" : "Disable") + " transport text marquee");
-        if (mAlarmStatusView != null) mAlarmStatusView.setSelected(enabled);
         if (mOwnerInfo != null) mOwnerInfo.setSelected(enabled);
     }
 
@@ -149,8 +142,6 @@
     protected void onFinishInflate() {
         super.onFinishInflate();
         mClockContainer = findViewById(R.id.keyguard_clock_container);
-        mAlarmStatusView = findViewById(R.id.alarm_status);
-        mDateView = findViewById(R.id.date_view);
         mClockView = findViewById(R.id.clock_view);
         mClockView.setShowCurrentUserTime(true);
         if (KeyguardClockAccessibilityDelegate.isNeeded(mContext)) {
@@ -158,11 +149,9 @@
         }
         mOwnerInfo = findViewById(R.id.owner_info);
         mBatteryDoze = findViewById(R.id.battery_doze);
-        mKeyguardStatusArea = findViewById(R.id.keyguard_status_area);
-        mVisibleInDoze = new View[]{mBatteryDoze, mClockView, mKeyguardStatusArea};
+        mKeyguardSlice = findViewById(R.id.keyguard_status_area);
+        mVisibleInDoze = new View[]{mBatteryDoze, mClockView, mKeyguardSlice};
         mTextColor = mClockView.getCurrentTextColor();
-        mDateTextColor = mDateView.getCurrentTextColor();
-        mAlarmTextColor = mAlarmStatusView.getCurrentTextColor();
 
         boolean shouldMarquee = KeyguardUpdateMonitor.getInstance(mContext).isDeviceInteractive();
         setEnableMarquee(shouldMarquee);
@@ -184,8 +173,6 @@
         layoutParams.bottomMargin = getResources().getDimensionPixelSize(
                 R.dimen.bottom_text_spacing_digital);
         mClockView.setLayoutParams(layoutParams);
-        mDateView.setTextSize(TypedValue.COMPLEX_UNIT_PX,
-                getResources().getDimensionPixelSize(R.dimen.widget_label_font_size));
         if (mOwnerInfo != null) {
             mOwnerInfo.setTextSize(TypedValue.COMPLEX_UNIT_PX,
                     getResources().getDimensionPixelSize(R.dimen.widget_label_font_size));
@@ -193,8 +180,6 @@
     }
 
     public void refreshTime() {
-        mDateView.setDatePattern(Patterns.dateViewSkel);
-
         mClockView.setFormat12Hour(Patterns.clockView12);
         mClockView.setFormat24Hour(Patterns.clockView24);
     }
@@ -205,23 +190,11 @@
         Patterns.update(mContext, nextAlarm != null);
 
         refreshTime();
-        refreshAlarmStatus(nextAlarm);
-    }
-
-    void refreshAlarmStatus(AlarmManager.AlarmClockInfo nextAlarm) {
-        if (nextAlarm != null) {
-            String alarm = formatNextAlarm(mContext, nextAlarm);
-            mAlarmStatusView.setText(alarm);
-            mAlarmStatusView.setContentDescription(
-                    getResources().getString(R.string.keyguard_accessibility_next_alarm, alarm));
-            mAlarmStatusView.setVisibility(View.VISIBLE);
-        } else {
-            mAlarmStatusView.setVisibility(View.GONE);
-        }
     }
 
     public int getClockBottom() {
-        return mKeyguardStatusArea.getBottom();
+        return mKeyguardSlice.getVisibility() == VISIBLE ? mKeyguardSlice.getBottom()
+                : mClockView.getBottom();
     }
 
     public float getClockTextSize() {
@@ -341,11 +314,8 @@
 
         updateDozeVisibleViews();
         mBatteryDoze.setDark(dark);
+        mKeyguardSlice.setDark(darkAmount);
         mClockView.setTextColor(ColorUtils.blendARGB(mTextColor, Color.WHITE, darkAmount));
-        mDateView.setTextColor(ColorUtils.blendARGB(mDateTextColor, Color.WHITE, darkAmount));
-        int blendedAlarmColor = ColorUtils.blendARGB(mAlarmTextColor, Color.WHITE, darkAmount);
-        mAlarmStatusView.setTextColor(blendedAlarmColor);
-        mAlarmStatusView.setCompoundDrawableTintList(ColorStateList.valueOf(blendedAlarmColor));
     }
 
     public void setPulsing(boolean pulsing) {
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardSliceProvider.java b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardSliceProvider.java
new file mode 100644
index 0000000..03018f7
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardSliceProvider.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2017 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.systemui.keyguard;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.icu.text.DateFormat;
+import android.icu.text.DisplayContext;
+import android.net.Uri;
+import android.os.Handler;
+import android.app.slice.Slice;
+import android.app.slice.SliceProvider;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.systemui.R;
+
+import java.util.Date;
+import java.util.Locale;
+
+/**
+ * Simple Slice provider that shows the current date.
+ */
+public class KeyguardSliceProvider extends SliceProvider {
+
+    public static final String KEYGUARD_SLICE_URI = "content://com.android.systemui.keyguard/main";
+
+    private final Date mCurrentTime = new Date();
+    protected final Uri mSliceUri;
+    private final Handler mHandler;
+    private String mDatePattern;
+    private DateFormat mDateFormat;
+    private String mLastText;
+    private boolean mRegistered;
+    private boolean mRegisteredEveryMinute;
+
+    /**
+     * Receiver responsible for time ticking and updating the date format.
+     */
+    @VisibleForTesting
+    final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            final String action = intent.getAction();
+            if (Intent.ACTION_TIME_TICK.equals(action)
+                    || Intent.ACTION_DATE_CHANGED.equals(action)
+                    || Intent.ACTION_TIME_CHANGED.equals(action)
+                    || Intent.ACTION_TIMEZONE_CHANGED.equals(action)
+                    || Intent.ACTION_LOCALE_CHANGED.equals(action)) {
+                if (Intent.ACTION_LOCALE_CHANGED.equals(action)
+                        || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
+                    // need to get a fresh date format
+                    mHandler.post(KeyguardSliceProvider.this::cleanDateFormat);
+                }
+                mHandler.post(KeyguardSliceProvider.this::updateClock);
+            }
+        }
+    };
+
+    public KeyguardSliceProvider() {
+        this(new Handler());
+    }
+
+    @VisibleForTesting
+    KeyguardSliceProvider(Handler handler) {
+        mHandler = handler;
+        mSliceUri = Uri.parse(KEYGUARD_SLICE_URI);
+    }
+
+    @Override
+    public Slice onBindSlice(Uri sliceUri) {
+        return new Slice.Builder(sliceUri).addText(mLastText, Slice.HINT_TITLE).build();
+    }
+
+    @Override
+    public boolean onCreate() {
+
+        mDatePattern = getContext().getString(R.string.system_ui_date_pattern);
+
+        registerClockUpdate(false /* everyMinute */);
+        updateClock();
+        return true;
+    }
+
+    protected void registerClockUpdate(boolean everyMinute) {
+        if (mRegistered) {
+            if (mRegisteredEveryMinute == everyMinute) {
+                return;
+            } else {
+                unregisterClockUpdate();
+            }
+        }
+
+        IntentFilter filter = new IntentFilter();
+        if (everyMinute) {
+            filter.addAction(Intent.ACTION_TIME_TICK);
+        }
+        filter.addAction(Intent.ACTION_DATE_CHANGED);
+        filter.addAction(Intent.ACTION_TIME_CHANGED);
+        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
+        filter.addAction(Intent.ACTION_LOCALE_CHANGED);
+        getContext().registerReceiver(mIntentReceiver, filter, null /* permission*/,
+                null /* scheduler */);
+        mRegistered = true;
+        mRegisteredEveryMinute = everyMinute;
+    }
+
+    protected void unregisterClockUpdate() {
+        if (!mRegistered) {
+            return;
+        }
+        getContext().unregisterReceiver(mIntentReceiver);
+        mRegistered = false;
+    }
+
+    @VisibleForTesting
+    boolean isRegistered() {
+        return mRegistered;
+    }
+
+    protected void updateClock() {
+        final String text = getFormattedDate();
+        if (!text.equals(mLastText)) {
+            mLastText = text;
+            getContext().getContentResolver().notifyChange(mSliceUri, null /* observer */);
+        }
+    }
+
+    protected String getFormattedDate() {
+        if (mDateFormat == null) {
+            final Locale l = Locale.getDefault();
+            DateFormat format = DateFormat.getInstanceForSkeleton(mDatePattern, l);
+            format.setContext(DisplayContext.CAPITALIZATION_FOR_STANDALONE);
+            mDateFormat = format;
+        }
+        mCurrentTime.setTime(System.currentTimeMillis());
+        return mDateFormat.format(mCurrentTime);
+    }
+
+    @VisibleForTesting
+    void cleanDateFormat() {
+        mDateFormat = null;
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
index fa34d4a..3f0994d 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
@@ -7112,7 +7112,7 @@
         mAllowLockscreenRemoteInput = allowLockscreenRemoteInput;
     }
 
-    private void updateLockscreenNotificationSetting() {
+    protected void updateLockscreenNotificationSetting() {
         final boolean show = Settings.Secure.getIntForUser(mContext.getContentResolver(),
                 Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS,
                 1,