Compose gesture integrated fully into Launcher

- Support dismissing Compose via the reverse gesture from the appear
gesture
- Use Tony Wickham's ag/10204761 with some glue code to enable the
app below Compose panning in the same direction as the gesture as
Compose peeks in
- Add feature flag to use Compose hosted in a window (permits underlying
app panning)
- Use InterpolatingVelocityTracker to fix OtherActivityInputConsumer
processing swipes in the wrong direction ~20% of the time due to a bug
in VelocityTracker (see go/quirky-bubbles)

Change-Id: I65aa07ac112db8bd89cec9acfa0ce2b6ebacd43f

1 files changed, 23 insertions, 21 deletions

diff --git a/src_plugins/com/android/systemui/plugins/OverscrollPlugin.java b/src_plugins/com/android/systemui/plugins/OverscrollPlugin.java
index 28a9193bec..a434d078bc 100644
--- a/src_plugins/com/android/systemui/plugins/OverscrollPlugin.java
+++ b/src_plugins/com/android/systemui/plugins/OverscrollPlugin.java
@@ -15,6 +15,8 @@
  */
 package com.android.systemui.plugins;
 
+import android.view.MotionEvent;
+
 import com.android.systemui.plugins.annotations.ProvidesInterface;
 
 /**
@@ -28,7 +30,7 @@ import com.android.systemui.plugins.annotations.ProvidesInterface;
 public interface OverscrollPlugin extends Plugin {
 
     String ACTION = "com.android.systemui.action.PLUGIN_LAUNCHER_OVERSCROLL";
-    int VERSION = 3;
+    int VERSION = 4;
 
     String DEVICE_STATE_LOCKED = "Locked";
     String DEVICE_STATE_LAUNCHER = "Launcher";
@@ -41,33 +43,33 @@ public interface OverscrollPlugin extends Plugin {
     boolean isActive();
 
     /**
-     * Called when a touch is down and has been recognized as an overscroll gesture.
-     * A call of this method will always result in `onTouchUp` being called, and possibly
-     * `onFling` as well.
-     *
+     * Called when a touch has been recognized as an overscroll gesture.
+     * @param horizontalDistancePx Horizontal distance from the last finger location to the finger
+     *                               location when it first touched the screen.
+     * @param verticalDistancePx Horizontal distance from the last finger location to the finger
+     *                             location when it first touched the screen.
+     * @param thresholdPx Minimum distance for gesture.
+     * @param flingDistanceThresholdPx Minimum distance for gesture by fling.
+     * @param flingVelocityThresholdPx Minimum velocity for gesture by fling.
      * @param deviceState String representing the current device state
      * @param underlyingActivity String representing the currently active Activity
      */
-    void onTouchStart(String deviceState, String underlyingActivity);
-
-    /**
-     * Called when a touch that was previously recognized has moved.
-     *
-     * @param px distance between the position of touch on this update and the position of the
-     * touch when it was initially recognized.
-     */
-    void onTouchTraveled(int px);
+    void onTouchEvent(MotionEvent event,
+                      int horizontalDistancePx,
+                      int verticalDistancePx,
+                      int thresholdPx,
+                      int flingDistanceThresholdPx,
+                      int flingVelocityThresholdPx,
+                      String deviceState,
+                      String underlyingActivity);
 
     /**
-     * Called when a touch that was previously recognized has ended.
-     *
-     * @param px distance between the position of touch on this update and the position of the
-     * touch when it was initially recognized.
+     * @return `true` if overscroll gesture handling should override all other gestures.
      */
-    void onTouchEnd(int px);
+    boolean blockOtherGestures();
 
     /**
-     * Called when the user starts Compose with a fling. `onTouchUp` will also be called.
+     * @return `true` if the overscroll gesture can pan the underlying app.
      */
-    void onFling(float velocity);
+    boolean allowsUnderlyingActivityOverscroll();
 }