From e48009919dde13fded7242549413b018daa64a04 Mon Sep 17 00:00:00 2001
From: "Liam, Lee Pong Lam" <iamiam@google.com>
Date: Tue, 4 Jun 2024 00:34:49 +0000
Subject: [PATCH] [Launcher3] Hide keyboard when fastscroller scrolling down
 and keyboard shown

Implement keyboard hiding logic: Hide keyboard when scrolling down (y > mLastY) unless already requested (mRequestedHideKeyboard). Track hide request state to prevent redundant calls.

New added logic: Only hide keyobard while dragging the scrollbar

result video: https://photos.app.goo.gl/e4dYUUiUN3BujNUz9

Bug: 333967597
Flag: EXEMPT bugfix
Test: Manual
Change-Id: Id672763c69cbb37aeb7a1fd3f17eb168de9f49b4
---
 .../views/RecyclerViewFastScroller.java       | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/com/android/launcher3/views/RecyclerViewFastScroller.java b/src/com/android/launcher3/views/RecyclerViewFastScroller.java
index df8f635525..fa17b7bcfe 100644
--- a/src/com/android/launcher3/views/RecyclerViewFastScroller.java
+++ b/src/com/android/launcher3/views/RecyclerViewFastScroller.java
@@ -109,6 +109,13 @@ public class RecyclerViewFastScroller extends View {
 
     private float mLastTouchY;
     private boolean mIsDragging;
+    /**
+     * Tracks whether a keyboard hide request has been sent due to downward scrolling.
+     * <p>
+     * Set to true when scrolling down and reset when scrolling up to prevents redundant hide
+     * requests during continuous downward scrolls.
+     */
+    private boolean mRequestedHideKeyboard;
     private boolean mIsThumbDetached;
     private final boolean mCanThumbDetach;
     private boolean mIgnoreDragGesture;
@@ -127,6 +134,7 @@ public class RecyclerViewFastScroller extends View {
 
     protected FastScrollRecyclerView mRv;
     private RecyclerView.OnScrollListener mOnScrollListener;
+    private final ActivityContext mActivityContext;
 
     private int mDownX;
     private int mDownY;
@@ -163,7 +171,7 @@ public class RecyclerViewFastScroller extends View {
         mDeltaThreshold = res.getDisplayMetrics().density * SCROLL_DELTA_THRESHOLD_DP;
         mScrollbarLeftOffsetTouchDelegate = res.getDisplayMetrics().density
                 * SCROLLBAR_LEFT_OFFSET_TOUCH_DELEGATE_DP;
-
+        mActivityContext = ActivityContext.lookupContext(context);
         TypedArray ta =
                 context.obtainStyledAttributes(attrs, R.styleable.RecyclerViewFastScroller, defStyleAttr, 0);
         mCanThumbDetach = ta.getBoolean(R.styleable.RecyclerViewFastScroller_canThumbDetach, false);
@@ -248,6 +256,7 @@ public class RecyclerViewFastScroller extends View {
                 mDownX = x;
                 mDownY = mLastY = y;
                 mDownTimeStampMillis = ev.getDownTime();
+                mRequestedHideKeyboard = false;
 
                 if ((Math.abs(mDy) < mDeltaThreshold &&
                         mRv.getScrollState() != SCROLL_STATE_IDLE)) {
@@ -260,6 +269,7 @@ public class RecyclerViewFastScroller extends View {
                 }
                 break;
             case MotionEvent.ACTION_MOVE:
+                boolean isScrollingDown = y > mLastY;
                 mLastY = y;
                 int absDeltaY = Math.abs(y - mDownY);
                 int absDeltaX = Math.abs(x - mDownX);
@@ -275,6 +285,14 @@ public class RecyclerViewFastScroller extends View {
                     }
                 }
                 if (mIsDragging) {
+                    if (isScrollingDown) {
+                        if (!mRequestedHideKeyboard) {
+                            mActivityContext.hideKeyboard();
+                        }
+                        mRequestedHideKeyboard = true;
+                    } else {
+                        mRequestedHideKeyboard = false;
+                    }
                     updateFastScrollSectionNameAndThumbOffset(y);
                 }
                 break;
@@ -294,7 +312,6 @@ public class RecyclerViewFastScroller extends View {
     }
 
     private void calcTouchOffsetAndPrepToFastScroll(int downY, int lastY) {
-        ActivityContext.lookupContext(getContext()).hideKeyboard();
         mIsDragging = true;
         if (mCanThumbDetach) {
             mIsThumbDetached = true;