Swipe down on hotseat to launch recent task

If you're ever in overview and swipe down on the hotseat, it will launch
the focused task *unless* you entered overview from the workspace and
have not scrolled past the first task. This is a hidden state to allow
for reversibility of the swipe up from workspace.

Also moved PendingAnimation from quickstep to launcher3.

Change-Id: Iea077bc0ef7c74f6bf7b98d0a638892b9c5fe36c

1 files changed, 53 insertions, 0 deletions

diff --git a/src/com/android/launcher3/util/PendingAnimation.java b/src/com/android/launcher3/util/PendingAnimation.java
new file mode 100644
index 000000000..4116d56e1
--- /dev/null
+++ b/src/com/android/launcher3/util/PendingAnimation.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 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.util;
+
+import android.animation.AnimatorSet;
+import android.annotation.TargetApi;
+import android.os.Build;
+
+import java.util.ArrayList;
+import java.util.function.Consumer;
+
+/**
+ * Utility class to keep track of a running animation.
+ *
+ * This class allows attaching end callbacks to an animation is intended to be used with
+ * {@link com.android.launcher3.anim.AnimatorPlaybackController}, since in that case
+ * AnimationListeners are not properly dispatched.
+ */
+@TargetApi(Build.VERSION_CODES.O)
+public class PendingAnimation {
+
+    private final ArrayList<Consumer<Boolean>> mEndListeners = new ArrayList<>();
+
+    public final AnimatorSet anim;
+
+    public PendingAnimation(AnimatorSet anim) {
+        this.anim = anim;
+    }
+
+    public void finish(boolean isSuccess) {
+        for (Consumer<Boolean> listeners : mEndListeners) {
+            listeners.accept(isSuccess);
+        }
+        mEndListeners.clear();
+    }
+
+    public void addEndListener(Consumer<Boolean> listener) {
+        mEndListeners.add(listener);
+    }
+}