Add swipe-to-dismiss notifications in popup menu.

- Next secondary icon animates up to replace dismissed main notification
- Add padding around main notification so it always aligns with the
  straight edges of the view (not the rounded corners); looks more
  dismissable
- Notification view collapses as notifications are dismissed
- To mimic system notification behavior, we copy SwipeHelper,
  FlingAnimationUtils, and Interpolators. We also apply elevation
  to notifications and reveal a darker color beneath when dismissing.

Bug: 32410600
Change-Id: I9fbf10e73bb4996f17ef061c856efb013967d972

1 files changed, 244 insertions, 0 deletions

diff --git a/src/com/android/launcher3/notification/NotificationFooterLayout.java b/src/com/android/launcher3/notification/NotificationFooterLayout.java
new file mode 100644
index 000000000..2965e4a63
--- /dev/null
+++ b/src/com/android/launcher3/notification/NotificationFooterLayout.java
@@ -0,0 +1,244 @@
+/*
+ * 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.launcher3.notification;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAnimUtils;
+import com.android.launcher3.LauncherViewPropertyAnimator;
+import com.android.launcher3.R;
+import com.android.launcher3.graphics.IconPalette;
+import com.android.launcher3.popup.PopupContainerWithArrow;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A {@link LinearLayout} that contains icons of notifications. If there is only one icon,
+ * we also supply the notification text/secondary text like we do for the main notification.
+ * If there are more than {@link #MAX_FOOTER_NOTIFICATIONS} icons, we add a "+x" overflow.
+ */
+public class NotificationFooterLayout extends LinearLayout {
+
+    public interface IconAnimationEndListener {
+        void onIconAnimationEnd(NotificationInfo animatedNotification);
+    }
+
+    private static final int MAX_FOOTER_NOTIFICATIONS = 5;
+
+    private static final Rect sTempRect = new Rect();
+
+    private final List<NotificationInfo> mNotifications = new ArrayList<>();
+    private final List<NotificationInfo> mOverflowNotifications = new ArrayList<>();
+    private final Map<View, NotificationInfo> mViewsToInfos = new HashMap<>();
+
+    LinearLayout.LayoutParams mIconLayoutParams;
+    private LinearLayout mIconRow;
+    private int mTextColor;
+
+    public NotificationFooterLayout(Context context) {
+        this(context, null, 0);
+    }
+
+    public NotificationFooterLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public NotificationFooterLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+
+        int size = getResources().getDimensionPixelSize(
+                R.dimen.notification_footer_icon_size);
+        int padding = getResources().getDimensionPixelSize(
+                R.dimen.deep_shortcut_drawable_padding);
+        mIconLayoutParams = new LayoutParams(size, size);
+        mIconLayoutParams.setMarginStart(padding);
+        mIconLayoutParams.gravity = Gravity.CENTER_VERTICAL;
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mIconRow = (LinearLayout) findViewById(R.id.icon_row);
+    }
+
+    public void applyColors(IconPalette iconPalette) {
+        setBackgroundTintList(ColorStateList.valueOf(iconPalette.backgroundColor));
+        findViewById(R.id.divider).setBackgroundColor(iconPalette.secondaryColor);
+        mTextColor = iconPalette.textColor;
+    }
+
+    /**
+     * Keep track of the NotificationInfo, and then update the UI when
+     * {@link #commitNotificationInfos()} is called.
+     */
+    public void addNotificationInfo(final NotificationInfo notificationInfo) {
+        if (mNotifications.size() < MAX_FOOTER_NOTIFICATIONS) {
+            mNotifications.add(notificationInfo);
+        } else {
+            mOverflowNotifications.add(notificationInfo);
+        }
+    }
+
+    /**
+     * Adds icons and potentially overflow text for all of the NotificationInfo's
+     * added using {@link #addNotificationInfo(NotificationInfo)}.
+     */
+    public void commitNotificationInfos() {
+        mIconRow.removeAllViews();
+        mViewsToInfos.clear();
+
+        for (int i = 0; i < mNotifications.size(); i++) {
+            NotificationInfo info = mNotifications.get(i);
+            addNotificationIconForInfo(info, false /* fromOverflow */);
+        }
+
+        if (!mOverflowNotifications.isEmpty()) {
+            TextView overflowText = new TextView(getContext());
+            overflowText.setTextColor(mTextColor);
+            updateOverflowText(overflowText);
+            mIconRow.addView(overflowText, mIconLayoutParams);
+        }
+    }
+
+    private void addNotificationIconForInfo(NotificationInfo info, boolean fromOverflow) {
+        View icon = new View(getContext());
+        icon.setBackground(info.iconDrawable);
+        icon.setOnClickListener(info);
+        int addIndex = mIconRow.getChildCount();
+        if (fromOverflow) {
+            // Add the notification before the overflow view.
+            addIndex--;
+            icon.setAlpha(0);
+            icon.animate().alpha(1);
+        }
+        mIconRow.addView(icon, addIndex, mIconLayoutParams);
+        mViewsToInfos.put(icon, info);
+    }
+
+    private void updateOverflowText(TextView overflowTextView) {
+        overflowTextView.setText(getResources().getString(R.string.deep_notifications_overflow,
+                mOverflowNotifications.size()));
+    }
+
+    public void animateFirstNotificationTo(Rect toBounds,
+            final IconAnimationEndListener callback) {
+        AnimatorSet animation = LauncherAnimUtils.createAnimatorSet();
+        final View firstNotification = mIconRow.getChildAt(0);
+
+        Rect fromBounds = sTempRect;
+        firstNotification.getGlobalVisibleRect(fromBounds);
+        float scale = (float) toBounds.height() / fromBounds.height();
+        Animator moveAndScaleIcon = new LauncherViewPropertyAnimator(firstNotification)
+                .translationY(toBounds.top - fromBounds.top
+                        + (fromBounds.height() * scale - fromBounds.height()) / 2)
+                .scaleX(scale).scaleY(scale);
+        moveAndScaleIcon.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                callback.onIconAnimationEnd(mViewsToInfos.get(firstNotification));
+            }
+        });
+        animation.play(moveAndScaleIcon);
+
+        // Shift all notifications (not the overflow) over to fill the gap.
+        int gapWidth = mIconLayoutParams.width + mIconLayoutParams.getMarginStart();
+        int numIcons = mIconRow.getChildCount()
+                - (mOverflowNotifications.isEmpty() ? 0 : 1);
+        for (int i = 1; i < numIcons; i++) {
+            final View child = mIconRow.getChildAt(i);
+            Animator shiftChild = new LauncherViewPropertyAnimator(child).translationX(-gapWidth);
+            shiftChild.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    // We have to set the translation X to 0 when the new main notification
+                    // is removed from the footer.
+                    // TODO: remove it here instead of expecting trimNotifications to do so.
+                    child.setTranslationX(0);
+                }
+            });
+            animation.play(shiftChild);
+        }
+        animation.start();
+    }
+
+    public void trimNotifications(Set<String> notifications) {
+        if (!isAttachedToWindow() || mIconRow.getChildCount() == 0) {
+            return;
+        }
+        Iterator<NotificationInfo> overflowIterator = mOverflowNotifications.iterator();
+        while (overflowIterator.hasNext()) {
+            if (!notifications.contains(overflowIterator.next().notificationKey)) {
+                overflowIterator.remove();
+            }
+        }
+        TextView overflowView = null;
+        for (int i = mIconRow.getChildCount() - 1; i >= 0; i--) {
+            View child = mIconRow.getChildAt(i);
+            if (child instanceof TextView) {
+                overflowView = (TextView) child;
+            } else {
+                NotificationInfo childInfo = mViewsToInfos.get(child);
+                if (!notifications.contains(childInfo.notificationKey)) {
+                    mIconRow.removeView(child);
+                    mNotifications.remove(childInfo);
+                    mViewsToInfos.remove(child);
+                    if (!mOverflowNotifications.isEmpty()) {
+                        NotificationInfo notification = mOverflowNotifications.remove(0);
+                        mNotifications.add(notification);
+                        addNotificationIconForInfo(notification, true /* fromOverflow */);
+                    }
+                }
+            }
+        }
+        if (overflowView != null) {
+            if (mOverflowNotifications.isEmpty()) {
+                mIconRow.removeView(overflowView);
+            } else {
+                updateOverflowText(overflowView);
+            }
+        }
+        if (mIconRow.getChildCount() == 0) {
+            // There are no more icons in the secondary view, so hide it.
+            PopupContainerWithArrow popup = PopupContainerWithArrow.getOpen(
+                    Launcher.getLauncher(getContext()));
+            int newHeight = getResources().getDimensionPixelSize(
+                    R.dimen.notification_footer_collapsed_height);
+            AnimatorSet collapseSecondary = LauncherAnimUtils.createAnimatorSet();
+            collapseSecondary.play(popup.animateTranslationYBy(getHeight() - newHeight,
+                    getResources().getInteger(R.integer.config_removeNotificationViewDuration)));
+            collapseSecondary.play(LauncherAnimUtils.animateViewHeight(
+                    this, getHeight(), newHeight));
+            collapseSecondary.start();
+        }
+    }
+}