Show more shortcuts when last notification is dimissed

We currently only show 2 shortcuts when notifications are
present, but support up to 4 otherwise. With this change,
the hidden shortcuts are added back after dismissing the
notifications, instead of only after closing and reopening
the container.

To ensure the transition is as elegant as possible, we also
separated the shortcuts header from the rest of the shortcuts.
That way we can reveal the new shortcuts without removing the
header (the shortcuts come out from behind the header).

Bug: 38036250
Change-Id: Ie9ab35f9be57cec1d5345e9e70e84e09ea52c9fc

1 files changed, 97 insertions, 8 deletions

diff --git a/src/com/android/launcher3/shortcuts/ShortcutsItemView.java b/src/com/android/launcher3/shortcuts/ShortcutsItemView.java
index 340a6f000..7f836eb11 100644
--- a/src/com/android/launcher3/shortcuts/ShortcutsItemView.java
+++ b/src/com/android/launcher3/shortcuts/ShortcutsItemView.java
@@ -16,8 +16,12 @@
 
 package com.android.launcher3.shortcuts;
 
+import android.animation.Animator;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.graphics.Point;
+import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
@@ -28,7 +32,9 @@ import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAnimUtils;
 import com.android.launcher3.R;
+import com.android.launcher3.anim.RoundedRectRevealOutlineProvider;
 import com.android.launcher3.dragndrop.DragOptions;
 import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.logging.UserEventDispatcher.LogContainerProvider;
@@ -50,6 +56,7 @@ public class ShortcutsItemView extends PopupItemView implements View.OnLongClick
         View.OnTouchListener, LogContainerProvider {
 
     private Launcher mLauncher;
+    private LinearLayout mContent;
     private LinearLayout mShortcutsLayout;
     private LinearLayout mSystemShortcutIcons;
     private final Point mIconShift = new Point();
@@ -57,6 +64,8 @@ public class ShortcutsItemView extends PopupItemView implements View.OnLongClick
     private final List<DeepShortcutView> mDeepShortcutViews = new ArrayList<>();
     private final List<View> mSystemShortcutViews = new ArrayList<>();
 
+    private int mHiddenShortcutsHeight;
+
     public ShortcutsItemView(Context context) {
         this(context, null, 0);
     }
@@ -74,7 +83,8 @@ public class ShortcutsItemView extends PopupItemView implements View.OnLongClick
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
-        mShortcutsLayout = findViewById(R.id.deep_shortcuts);
+        mContent = findViewById(R.id.content);
+        mShortcutsLayout = findViewById(R.id.shortcuts);
     }
 
     @Override
@@ -130,17 +140,18 @@ public class ShortcutsItemView extends PopupItemView implements View.OnLongClick
             // System shortcut icons are added to a header that is separate from the full shortcuts.
             if (mSystemShortcutIcons == null) {
                 mSystemShortcutIcons = (LinearLayout) mLauncher.getLayoutInflater().inflate(
-                        R.layout.system_shortcut_icons, mShortcutsLayout, false);
+                        R.layout.system_shortcut_icons, mContent, false);
 
                 View divider = LayoutInflater.from(getContext()).inflate(
                         R.layout.horizontal_divider, this, false);
 
-                if (mShortcutsLayout.getChildCount() > 0) {
-                    mShortcutsLayout.addView(divider);
-                }
-                mShortcutsLayout.addView(mSystemShortcutIcons);
-                if (mShortcutsLayout.getChildCount() == 1) {
-                    mShortcutsLayout.addView(divider);
+                boolean iconsAreBelowShortcuts = mShortcutsLayout.getChildCount() > 0;
+                if (iconsAreBelowShortcuts) {
+                    mContent.addView(divider);
+                    mContent.addView(mSystemShortcutIcons);
+                } else {
+                    mContent.addView(divider, 0);
+                    mContent.addView(mSystemShortcutIcons, 0);
                 }
             }
             mSystemShortcutIcons.addView(shortcutView, index);
@@ -172,6 +183,84 @@ public class ShortcutsItemView extends PopupItemView implements View.OnLongClick
     }
 
     /**
+     * Hides shortcuts until only {@param maxShortcuts} are showing.
+     */
+    public void hideShortcuts(boolean hideFromTop, int maxShortcuts) {
+        int numToHide = mShortcutsLayout.getChildCount() - maxShortcuts;
+        if (numToHide <= 0) {
+            return;
+        }
+        mHiddenShortcutsHeight = 0;
+        final int numShortcuts = mShortcutsLayout.getChildCount();
+        final int dir = hideFromTop ? 1 : -1;
+        for (int i = hideFromTop ? 0 : numShortcuts - 1; 0 <= i && i < numShortcuts; i += dir) {
+            View child = mShortcutsLayout.getChildAt(i);
+            if (child instanceof DeepShortcutView) {
+                mHiddenShortcutsHeight += child.getLayoutParams().height;
+                child.setVisibility(GONE);
+                int prev = i + dir;
+                if (!hideFromTop && 0 <= prev && prev < numShortcuts) {
+                    // When hiding views from the bottom, make sure to hide the last divider.
+                    mShortcutsLayout.getChildAt(prev).findViewById(R.id.divider).setVisibility(GONE);
+                }
+                numToHide--;
+                if (numToHide == 0) {
+                    break;
+                }
+            }
+        }
+    }
+
+    public int getHiddenShortcutsHeight() {
+        return mHiddenShortcutsHeight;
+    }
+
+    /**
+     * Sets all shortcuts in {@link #mShortcutsLayout} to VISIBLE, then creates an
+     * animation to reveal the newly shown shortcuts.
+     *
+     * @see #hideShortcuts(boolean, int)
+     */
+    public Animator showAllShortcuts(boolean showFromTop) {
+        // First set all the shortcuts to VISIBLE.
+        final int numShortcuts = mShortcutsLayout.getChildCount();
+        for (int i = 0; i < numShortcuts; i++) {
+            DeepShortcutView view = (DeepShortcutView) mShortcutsLayout.getChildAt(i);
+            view.setVisibility(VISIBLE);
+            if (i < numShortcuts - 1) {
+                view.findViewById(R.id.divider).setVisibility(VISIBLE);
+            }
+        }
+
+        // Now reveal the newly shown shortcuts.
+        AnimatorSet animation = LauncherAnimUtils.createAnimatorSet();
+
+        if (showFromTop) {
+            // The new shortcuts pushed the original shortcuts down, but we want to animate them
+            // to that position. So we revert the translation and animate to the new.
+            animation.play(ObjectAnimator.ofFloat(mShortcutsLayout, TRANSLATION_Y,
+                    mShortcutsLayout.getTranslationY() - mHiddenShortcutsHeight,
+                    mShortcutsLayout.getTranslationY()));
+        } else if (mSystemShortcutIcons != null) {
+            // When adding the shortcuts from the bottom, things are a little trickier, since
+            // that means they push the icons header down. To account for this, we do the same
+            // translation trick as above, but on the header. Since this means leaving behind
+            // a blank area where the header was, we also need to clip the background.
+            animation.play(ObjectAnimator.ofFloat(mSystemShortcutIcons, TRANSLATION_Y,
+                    mSystemShortcutIcons.getTranslationY() - mHiddenShortcutsHeight,
+                    mSystemShortcutIcons.getTranslationY()));
+            // mPillRect is the bounds of this view before the new shortcuts were shown.
+            Rect backgroundStartRect = new Rect(mPillRect);
+            Rect backgroundEndRect = new Rect(mPillRect);
+            backgroundEndRect.bottom += mHiddenShortcutsHeight;
+            animation.play(new RoundedRectRevealOutlineProvider(getBackgroundRadius(),
+                    getBackgroundRadius(), backgroundStartRect, backgroundEndRect, mRoundedCorners)
+                    .createRevealAnimator(this, false));
+        }
+        return animation;
+    }
+
+    /**
      * Adds a {@link SystemShortcut.Widgets} item if there are widgets for the given ItemInfo.
      */
     public void enableWidgetsIfExist(final BubbleTextView originalIcon) {