Revert "Track hovering pointers explicitly"

Revert "Remove duplicate ACTION_HOVER_MOVE"

Revert submission 20414906-refactor hovering pointers

Reason for revert: Part of DM+Platinum monitor efforts likely Likely causing b/261731836. This won't be submitted if proven otherwise.

Reverted Changes:
I3665d8e68:Remove duplicate ACTION_HOVER_MOVE
I047926e53:Track hovering pointers explicitly

Change-Id: I64b682558071661d79dca953d449251f79ee7004
diff --git a/include/input/PrintTools.h b/include/input/PrintTools.h
index a20544b..e24344b 100644
--- a/include/input/PrintTools.h
+++ b/include/input/PrintTools.h
@@ -16,7 +16,6 @@
 
 #pragma once
 
-#include <bitset>
 #include <map>
 #include <optional>
 #include <set>
@@ -24,11 +23,6 @@
 
 namespace android {
 
-template <size_t N>
-std::string bitsetToString(const std::bitset<N>& bitset) {
-    return bitset.to_string();
-}
-
 template <typename T>
 inline std::string constToString(const T& v) {
     return std::to_string(v);
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 4d3e6de..4aac377 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -554,65 +554,6 @@
     return std::nullopt;
 }
 
-/**
- * Compare the old touch state to the new touch state, and generate the corresponding touched
- * windows (== input targets).
- * If a window had the hovering pointer, but now it doesn't, produce HOVER_EXIT for that window.
- * If the pointer just entered the new window, produce HOVER_ENTER.
- * For pointers remaining in the window, produce HOVER_MOVE.
- */
-std::vector<TouchedWindow> getHoveringWindowsLocked(const TouchState* oldState,
-                                                    const TouchState& newTouchState,
-                                                    const MotionEntry& entry) {
-    std::vector<TouchedWindow> out;
-    const int32_t maskedAction = MotionEvent::getActionMasked(entry.action);
-    if (maskedAction != AMOTION_EVENT_ACTION_HOVER_ENTER &&
-        maskedAction != AMOTION_EVENT_ACTION_HOVER_MOVE &&
-        maskedAction != AMOTION_EVENT_ACTION_HOVER_EXIT) {
-        // Not a hover event - don't need to do anything
-        return out;
-    }
-
-    // We should consider all hovering pointers here. But for now, just use the first one
-    const int32_t pointerId = entry.pointerProperties[0].id;
-
-    std::set<sp<WindowInfoHandle>> oldWindows;
-    if (oldState != nullptr) {
-        oldWindows = oldState->getWindowsWithHoveringPointer(entry.deviceId, pointerId);
-    }
-
-    std::set<sp<WindowInfoHandle>> newWindows =
-            newTouchState.getWindowsWithHoveringPointer(entry.deviceId, pointerId);
-
-    // If the pointer is no longer in the new window set, send HOVER_EXIT.
-    for (const sp<WindowInfoHandle>& oldWindow : oldWindows) {
-        if (newWindows.find(oldWindow) == newWindows.end()) {
-            TouchedWindow touchedWindow;
-            touchedWindow.windowHandle = oldWindow;
-            touchedWindow.targetFlags = InputTarget::Flags::DISPATCH_AS_HOVER_EXIT;
-            touchedWindow.pointerIds.markBit(pointerId);
-            out.push_back(touchedWindow);
-        }
-    }
-
-    for (const sp<WindowInfoHandle>& newWindow : newWindows) {
-        TouchedWindow touchedWindow;
-        touchedWindow.windowHandle = newWindow;
-        if (oldWindows.find(newWindow) == oldWindows.end()) {
-            // Any windows that have this pointer now, and didn't have it before, should get
-            // HOVER_ENTER
-            touchedWindow.targetFlags = InputTarget::Flags::DISPATCH_AS_HOVER_ENTER;
-        } else {
-            // This pointer was already sent to the window. Use ACTION_HOVER_MOVE.
-            LOG_ALWAYS_FATAL_IF(maskedAction != AMOTION_EVENT_ACTION_HOVER_MOVE);
-            touchedWindow.targetFlags = InputTarget::Flags::DISPATCH_AS_IS;
-        }
-        touchedWindow.pointerIds.markBit(pointerId);
-        out.push_back(touchedWindow);
-    }
-    return out;
-}
-
 } // namespace
 
 // --- InputDispatcher ---
@@ -2142,6 +2083,8 @@
 
     // Update the touch state as needed based on the properties of the touch event.
     outInjectionResult = InputEventInjectionResult::PENDING;
+    sp<WindowInfoHandle> newHoverWindowHandle(mLastHoverWindowHandle);
+    sp<WindowInfoHandle> newTouchedWindowHandle;
 
     // Copy current touch state into tempTouchState.
     // This state will be used to update mTouchStatesByDisplay at the end of this function.
@@ -2174,7 +2117,7 @@
             outInjectionResult = InputEventInjectionResult::FAILED;
             return touchedWindows; // wrong device
         }
-        tempTouchState.clearWindowsWithoutPointers();
+        tempTouchState.reset();
         tempTouchState.deviceId = entry.deviceId;
         tempTouchState.source = entry.source;
         isSplit = false;
@@ -2187,21 +2130,14 @@
         return touchedWindows; // wrong device
     }
 
-    if (isHoverAction) {
-        // For hover actions, we will treat 'tempTouchState' as a new state, so let's erase
-        // all of the existing hovering pointers and recompute.
-        tempTouchState.clearHoveringPointers();
-    }
-
     if (newGesture || (isSplit && maskedAction == AMOTION_EVENT_ACTION_POINTER_DOWN)) {
         /* Case 1: New splittable pointer going down, or need target for hover or scroll. */
         const auto [x, y] = resolveTouchedPosition(entry);
         const int32_t pointerIndex = getMotionEventActionPointerIndex(action);
         const bool isDown = maskedAction == AMOTION_EVENT_ACTION_DOWN;
         const bool isStylus = isPointerFromStylus(entry, pointerIndex);
-        sp<WindowInfoHandle> newTouchedWindowHandle =
-                findTouchedWindowAtLocked(displayId, x, y, &tempTouchState, isStylus,
-                                          isDown /*addOutsideTargets*/);
+        newTouchedWindowHandle = findTouchedWindowAtLocked(displayId, x, y, &tempTouchState,
+                                                           isStylus, isDown /*addOutsideTargets*/);
 
         // Handle the case where we did not find a window.
         if (newTouchedWindowHandle == nullptr) {
@@ -2236,6 +2172,15 @@
             isSplit = !isFromMouse;
         }
 
+        // Update hover state.
+        if (newTouchedWindowHandle != nullptr) {
+            if (maskedAction == AMOTION_EVENT_ACTION_HOVER_EXIT) {
+                newHoverWindowHandle = nullptr;
+            } else if (isHoverAction) {
+                newHoverWindowHandle = newTouchedWindowHandle;
+            }
+        }
+
         std::vector<sp<WindowInfoHandle>> newTouchedWindows =
                 findTouchedSpyWindowsAtLocked(displayId, x, y, isStylus);
         if (newTouchedWindowHandle != nullptr) {
@@ -2255,18 +2200,6 @@
                 continue;
             }
 
-            if (isHoverAction) {
-                const int32_t pointerId = entry.pointerProperties[0].id;
-                if (maskedAction == AMOTION_EVENT_ACTION_HOVER_EXIT) {
-                    // Pointer left. Remove it
-                    tempTouchState.removeHoveringPointer(entry.deviceId, pointerId);
-                } else {
-                    // The "windowHandle" is the target of this hovering pointer.
-                    tempTouchState.addHoveringPointerToWindow(windowHandle, entry.deviceId,
-                                                              pointerId);
-                }
-            }
-
             // Set target flags.
             ftl::Flags<InputTarget::Flags> targetFlags = InputTarget::Flags::DISPATCH_AS_IS;
 
@@ -2286,9 +2219,7 @@
 
             // Update the temporary touch state.
             BitSet32 pointerIds;
-            if (!isHoverAction) {
-                pointerIds.markBit(entry.pointerProperties[pointerIndex].id);
-            }
+            pointerIds.markBit(entry.pointerProperties[pointerIndex].id);
 
             tempTouchState.addOrUpdateWindow(windowHandle, targetFlags, pointerIds,
                                              entry.eventTime);
@@ -2324,7 +2255,7 @@
             const bool isStylus = isPointerFromStylus(entry, 0 /*pointerIndex*/);
             sp<WindowInfoHandle> oldTouchedWindowHandle =
                     tempTouchState.getFirstForegroundWindowHandle();
-            sp<WindowInfoHandle> newTouchedWindowHandle =
+            newTouchedWindowHandle =
                     findTouchedWindowAtLocked(displayId, x, y, &tempTouchState, isStylus);
 
             // Verify targeted injection.
@@ -2395,11 +2326,36 @@
     }
 
     // Update dispatching for hover enter and exit.
-    {
-        std::vector<TouchedWindow> hoveringWindows =
-                getHoveringWindowsLocked(oldState, tempTouchState, entry);
-        touchedWindows.insert(touchedWindows.end(), hoveringWindows.begin(), hoveringWindows.end());
+    if (newHoverWindowHandle != mLastHoverWindowHandle) {
+        // Let the previous window know that the hover sequence is over, unless we already did
+        // it when dispatching it as is to newTouchedWindowHandle.
+        if (mLastHoverWindowHandle != nullptr &&
+            (maskedAction != AMOTION_EVENT_ACTION_HOVER_EXIT ||
+             mLastHoverWindowHandle != newTouchedWindowHandle)) {
+            if (DEBUG_HOVER) {
+                ALOGD("Sending hover exit event to window %s.",
+                      mLastHoverWindowHandle->getName().c_str());
+            }
+            tempTouchState.addOrUpdateWindow(mLastHoverWindowHandle,
+                                             InputTarget::Flags::DISPATCH_AS_HOVER_EXIT,
+                                             BitSet32(0));
+        }
+
+        // Let the new window know that the hover sequence is starting, unless we already did it
+        // when dispatching it as is to newTouchedWindowHandle.
+        if (newHoverWindowHandle != nullptr &&
+            (maskedAction != AMOTION_EVENT_ACTION_HOVER_ENTER ||
+             newHoverWindowHandle != newTouchedWindowHandle)) {
+            if (DEBUG_HOVER) {
+                ALOGD("Sending hover enter event to window %s.",
+                      newHoverWindowHandle->getName().c_str());
+            }
+            tempTouchState.addOrUpdateWindow(newHoverWindowHandle,
+                                             InputTarget::Flags::DISPATCH_AS_HOVER_ENTER,
+                                             BitSet32(0));
+        }
     }
+
     // Ensure that we have at least one foreground window or at least one window that cannot be a
     // foreground target. If we only have windows that are not receiving foreground touches (e.g. we
     // only have windows getting ACTION_OUTSIDE), then drop the event, because there is no window
@@ -2489,13 +2445,10 @@
         }
     }
 
-    // Success!  Output targets for everything except hovers.
-    if (!isHoverAction) {
-        touchedWindows.insert(touchedWindows.end(), tempTouchState.windows.begin(),
-                              tempTouchState.windows.end());
-    }
-
+    // Success!  Output targets.
+    touchedWindows = tempTouchState.windows;
     outInjectionResult = InputEventInjectionResult::SUCCEEDED;
+
     // Drop the outside or hover touch windows since we will not care about them
     // in the next iteration.
     tempTouchState.filterNonAsIsTouchWindows();
@@ -2516,16 +2469,14 @@
                      "Conflicting pointer actions: Hover received while pointer was down.");
             *outConflictingPointerActions = true;
         }
+        tempTouchState.reset();
         if (maskedAction == AMOTION_EVENT_ACTION_HOVER_ENTER ||
             maskedAction == AMOTION_EVENT_ACTION_HOVER_MOVE) {
             tempTouchState.deviceId = entry.deviceId;
             tempTouchState.source = entry.source;
         }
-    } else if (maskedAction == AMOTION_EVENT_ACTION_UP) {
-        // Pointer went up.
-        tempTouchState.removeTouchedPointer(entry.pointerProperties[0].id);
-        tempTouchState.clearWindowsWithoutPointers();
-    } else if (maskedAction == AMOTION_EVENT_ACTION_CANCEL) {
+    } else if (maskedAction == AMOTION_EVENT_ACTION_UP ||
+               maskedAction == AMOTION_EVENT_ACTION_CANCEL) {
         // All pointers up or canceled.
         tempTouchState.reset();
     } else if (maskedAction == AMOTION_EVENT_ACTION_DOWN) {
@@ -2564,6 +2515,9 @@
         mTouchStatesByDisplay.erase(displayId);
     }
 
+    // Update hover state.
+    mLastHoverWindowHandle = newHoverWindowHandle;
+
     return touchedWindows;
 }
 
@@ -4855,6 +4809,14 @@
     updateWindowHandlesForDisplayLocked(windowInfoHandles, displayId);
 
     const std::vector<sp<WindowInfoHandle>>& windowHandles = getWindowHandlesLocked(displayId);
+    if (mLastHoverWindowHandle) {
+        const WindowInfo* lastHoverWindowInfo = mLastHoverWindowHandle->getInfo();
+        if (lastHoverWindowInfo->displayId == displayId &&
+            std::find(windowHandles.begin(), windowHandles.end(), mLastHoverWindowHandle) ==
+                    windowHandles.end()) {
+            mLastHoverWindowHandle = nullptr;
+        }
+    }
 
     std::optional<FocusResolver::FocusChanges> changes =
             mFocusResolver.setInputWindows(displayId, windowHandles);
@@ -5302,6 +5264,7 @@
 
     mAnrTracker.clear();
     mTouchStatesByDisplay.clear();
+    mLastHoverWindowHandle.clear();
     mReplacedKeys.clear();
 }
 
@@ -6491,6 +6454,7 @@
         synthesizeCancelationEventsForAllConnectionsLocked(options);
 
         mTouchStatesByDisplay.clear();
+        mLastHoverWindowHandle.clear();
     }
     // Wake up poll loop since there might be work to do.
     mLooper->wake();
diff --git a/services/inputflinger/dispatcher/InputDispatcher.h b/services/inputflinger/dispatcher/InputDispatcher.h
index 3c7ddfa..5efb39e 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.h
+++ b/services/inputflinger/dispatcher/InputDispatcher.h
@@ -530,6 +530,9 @@
     // prevent unneeded wakeups.
     AnrTracker mAnrTracker GUARDED_BY(mLock);
 
+    // Contains the last window which received a hover event.
+    sp<android::gui::WindowInfoHandle> mLastHoverWindowHandle GUARDED_BY(mLock);
+
     void cancelEventsForAnrLocked(const sp<Connection>& connection) REQUIRES(mLock);
     // If a focused application changes, we should stop counting down the "no focused window" time,
     // because we will have no way of knowing when the previous application actually added a window.
diff --git a/services/inputflinger/dispatcher/TouchState.cpp b/services/inputflinger/dispatcher/TouchState.cpp
index f120fc9..c21af9e 100644
--- a/services/inputflinger/dispatcher/TouchState.cpp
+++ b/services/inputflinger/dispatcher/TouchState.cpp
@@ -31,30 +31,10 @@
     *this = TouchState();
 }
 
-void TouchState::removeTouchedPointer(int32_t pointerId) {
-    for (TouchedWindow& touchedWindow : windows) {
-        touchedWindow.pointerIds.clearBit(pointerId);
-    }
-}
-
-void TouchState::clearHoveringPointers() {
-    for (TouchedWindow& touchedWindow : windows) {
-        touchedWindow.clearHoveringPointers();
-    }
-}
-
-void TouchState::clearWindowsWithoutPointers() {
-    std::erase_if(windows, [](const TouchedWindow& w) {
-        return w.pointerIds.isEmpty() && !w.hasHoveringPointers();
-    });
-}
-
 void TouchState::addOrUpdateWindow(const sp<WindowInfoHandle>& windowHandle,
                                    ftl::Flags<InputTarget::Flags> targetFlags, BitSet32 pointerIds,
                                    std::optional<nsecs_t> eventTime) {
     for (TouchedWindow& touchedWindow : windows) {
-        // We do not compare windows by token here because two windows that share the same token
-        // may have a different transform
         if (touchedWindow.windowHandle == windowHandle) {
             touchedWindow.targetFlags |= targetFlags;
             if (targetFlags.test(InputTarget::Flags::DISPATCH_AS_SLIPPERY_EXIT)) {
@@ -79,21 +59,6 @@
     windows.push_back(touchedWindow);
 }
 
-void TouchState::addHoveringPointerToWindow(const sp<WindowInfoHandle>& windowHandle,
-                                            int32_t hoveringDeviceId, int32_t hoveringPointerId) {
-    for (TouchedWindow& touchedWindow : windows) {
-        if (touchedWindow.windowHandle == windowHandle) {
-            touchedWindow.addHoveringPointer(hoveringDeviceId, hoveringPointerId);
-            return;
-        }
-    }
-
-    TouchedWindow touchedWindow;
-    touchedWindow.windowHandle = windowHandle;
-    touchedWindow.addHoveringPointer(hoveringDeviceId, hoveringPointerId);
-    windows.push_back(touchedWindow);
-}
-
 void TouchState::removeWindowByToken(const sp<IBinder>& token) {
     for (size_t i = 0; i < windows.size(); i++) {
         if (windows[i].windowHandle->getToken() == token) {
@@ -180,26 +145,6 @@
                        [](const TouchedWindow& window) { return !window.pointerIds.isEmpty(); });
 }
 
-std::set<sp<WindowInfoHandle>> TouchState::getWindowsWithHoveringPointer(int32_t hoveringDeviceId,
-                                                                         int32_t pointerId) const {
-    std::set<sp<WindowInfoHandle>> out;
-    for (const TouchedWindow& window : windows) {
-        if (window.hasHoveringPointer(hoveringDeviceId, pointerId)) {
-            out.insert(window.windowHandle);
-        }
-    }
-    return out;
-}
-
-void TouchState::removeHoveringPointer(int32_t hoveringDeviceId, int32_t hoveringPointerId) {
-    for (TouchedWindow& window : windows) {
-        window.removeHoveringPointer(hoveringDeviceId, hoveringPointerId);
-    }
-    std::erase_if(windows, [](const TouchedWindow& w) {
-        return w.pointerIds.isEmpty() && !w.hasHoveringPointers();
-    });
-}
-
 std::string TouchState::dump() const {
     std::string out;
     out += StringPrintf("deviceId=%d, source=%s\n", deviceId,
diff --git a/services/inputflinger/dispatcher/TouchState.h b/services/inputflinger/dispatcher/TouchState.h
index b75e6ef..77c1cdf 100644
--- a/services/inputflinger/dispatcher/TouchState.h
+++ b/services/inputflinger/dispatcher/TouchState.h
@@ -16,7 +16,6 @@
 
 #pragma once
 
-#include <set>
 #include "TouchedWindow.h"
 
 namespace android {
@@ -40,16 +39,9 @@
     TouchState& operator=(const TouchState&) = default;
 
     void reset();
-    void clearWindowsWithoutPointers();
-
-    void removeTouchedPointer(int32_t pointerId);
     void addOrUpdateWindow(const sp<android::gui::WindowInfoHandle>& windowHandle,
                            ftl::Flags<InputTarget::Flags> targetFlags, BitSet32 pointerIds,
                            std::optional<nsecs_t> eventTime = std::nullopt);
-    void addHoveringPointerToWindow(const sp<android::gui::WindowInfoHandle>& windowHandle,
-                                    int32_t deviceId, int32_t hoveringPointerId);
-    void removeHoveringPointer(int32_t deviceId, int32_t hoveringPointerId);
-    void clearHoveringPointers();
     void removeWindowByToken(const sp<IBinder>& token);
     void filterNonAsIsTouchWindows();
 
@@ -64,9 +56,6 @@
     sp<android::gui::WindowInfoHandle> getWallpaperWindow() const;
     // Whether any of the windows are currently being touched
     bool isDown() const;
-
-    std::set<sp<android::gui::WindowInfoHandle>> getWindowsWithHoveringPointer(
-            int32_t deviceId, int32_t pointerId) const;
     std::string dump() const;
 };
 
diff --git a/services/inputflinger/dispatcher/TouchedWindow.cpp b/services/inputflinger/dispatcher/TouchedWindow.cpp
index 3704edd..af74598 100644
--- a/services/inputflinger/dispatcher/TouchedWindow.cpp
+++ b/services/inputflinger/dispatcher/TouchedWindow.cpp
@@ -25,49 +25,11 @@
 
 namespace inputdispatcher {
 
-bool TouchedWindow::hasHoveringPointers() const {
-    return !mHoveringPointerIdsByDevice.empty();
-}
-
-void TouchedWindow::clearHoveringPointers() {
-    mHoveringPointerIdsByDevice.clear();
-}
-
-bool TouchedWindow::hasHoveringPointer(int32_t deviceId, int32_t pointerId) const {
-    auto it = mHoveringPointerIdsByDevice.find(deviceId);
-    if (it == mHoveringPointerIdsByDevice.end()) {
-        return false;
-    }
-    return it->second.test(pointerId);
-}
-
-void TouchedWindow::addHoveringPointer(int32_t deviceId, int32_t pointerId) {
-    const auto [it, _] = mHoveringPointerIdsByDevice.insert({deviceId, {}});
-    it->second.set(pointerId);
-}
-
-void TouchedWindow::removeHoveringPointer(int32_t deviceId, int32_t pointerId) {
-    const auto it = mHoveringPointerIdsByDevice.find(deviceId);
-    if (it == mHoveringPointerIdsByDevice.end()) {
-        return;
-    }
-    it->second.set(pointerId, false);
-
-    if (it->second.none()) {
-        mHoveringPointerIdsByDevice.erase(deviceId);
-    }
-}
-
 std::string TouchedWindow::dump() const {
-    std::string out;
-    std::string hoveringPointers =
-            dumpMap(mHoveringPointerIdsByDevice, constToString, bitsetToString);
-    out += StringPrintf("name='%s', pointerIds=0x%0x, targetFlags=%s, firstDownTimeInTarget=%s, "
-                        "mHoveringPointerIdsByDevice=%s\n",
+    return StringPrintf("name='%s', pointerIds=0x%0x, "
+                        "targetFlags=%s, firstDownTimeInTarget=%s\n",
                         windowHandle->getName().c_str(), pointerIds.value,
-                        targetFlags.string().c_str(), toString(firstDownTimeInTarget).c_str(),
-                        hoveringPointers.c_str());
-    return out;
+                        targetFlags.string().c_str(), toString(firstDownTimeInTarget).c_str());
 }
 
 } // namespace inputdispatcher
diff --git a/services/inputflinger/dispatcher/TouchedWindow.h b/services/inputflinger/dispatcher/TouchedWindow.h
index add6b61..dd08323 100644
--- a/services/inputflinger/dispatcher/TouchedWindow.h
+++ b/services/inputflinger/dispatcher/TouchedWindow.h
@@ -17,9 +17,7 @@
 #pragma once
 
 #include <gui/WindowInfo.h>
-#include <input/Input.h>
 #include <utils/BitSet.h>
-#include <bitset>
 #include "InputTarget.h"
 
 namespace android {
@@ -35,17 +33,7 @@
     // Time at which the first action down occurred on this window.
     // NOTE: This is not initialized in case of HOVER entry/exit and DISPATCH_AS_OUTSIDE scenario.
     std::optional<nsecs_t> firstDownTimeInTarget;
-
-    bool hasHoveringPointers() const;
-
-    bool hasHoveringPointer(int32_t deviceId, int32_t pointerId) const;
-    void addHoveringPointer(int32_t deviceId, int32_t pointerId);
-    void removeHoveringPointer(int32_t deviceId, int32_t pointerId);
-    void clearHoveringPointers();
     std::string dump() const;
-
-private:
-    std::map<int32_t /*deviceId*/, std::bitset<MAX_POINTERS>> mHoveringPointerIdsByDevice;
 };
 
 } // namespace inputdispatcher
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index 9881cd4..41c174a 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -2135,6 +2135,7 @@
                                                          .y(400))
                                         .build()));
     windowRight->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
+    windowRight->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE));
 
     // Move cursor into left window
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
@@ -2147,6 +2148,7 @@
                                         .build()));
     windowRight->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_EXIT));
     windowLeft->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
+    windowLeft->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE));
 
     // Inject a series of mouse events for a mouse click
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
@@ -2204,6 +2206,7 @@
                                         .build()));
     windowLeft->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_EXIT));
     windowRight->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
+    windowRight->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE));
 
     // No more events
     windowLeft->assertNoEvents();
@@ -2265,6 +2268,7 @@
                                                          .y(400))
                                         .build()));
     window->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
+
     // Inject a series of mouse events for a mouse click
     ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
               injectMotionEvent(mDispatcher,
@@ -2322,38 +2326,8 @@
 }
 
 /**
- * Hover over a window, and then remove that window. Make sure that HOVER_EXIT for that event
- * is generated.
- */
-TEST_F(InputDispatcherTest, HoverExitIsSentToRemovedWindow) {
-    std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
-    sp<FakeWindowHandle> window =
-            sp<FakeWindowHandle>::make(application, mDispatcher, "Window", ADISPLAY_ID_DEFAULT);
-    window->setFrame(Rect(0, 0, 1200, 800));
-
-    mDispatcher->setFocusedApplication(ADISPLAY_ID_DEFAULT, application);
-
-    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {window}}});
-
-    ASSERT_EQ(InputEventInjectionResult::SUCCEEDED,
-              injectMotionEvent(mDispatcher,
-                                MotionEventBuilder(AMOTION_EVENT_ACTION_HOVER_ENTER,
-                                                   AINPUT_SOURCE_MOUSE)
-                                        .pointer(PointerBuilder(0, AMOTION_EVENT_TOOL_TYPE_MOUSE)
-                                                         .x(300)
-                                                         .y(400))
-                                        .build()));
-    window->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
-
-    // Remove the window, but keep the channel.
-    mDispatcher->setInputWindows({{ADISPLAY_ID_DEFAULT, {}}});
-    window->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_EXIT));
-}
-
-/**
  * Inject a mouse hover event followed by a tap from touchscreen.
- * The tap causes a HOVER_EXIT event to be generated because the current event
- * stream's source has been switched.
+ * In the current implementation, the tap does not cause a HOVER_EXIT event.
  */
 TEST_F(InputDispatcherTest, MouseHoverAndTouchTap) {
     std::shared_ptr<FakeApplicationHandle> application = std::make_shared<FakeApplicationHandle>();
@@ -2373,16 +2347,15 @@
     ASSERT_NO_FATAL_FAILURE(
             window->consumeMotionEvent(AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER),
                                              WithSource(AINPUT_SOURCE_MOUSE))));
+    ASSERT_NO_FATAL_FAILURE(
+            window->consumeMotionEvent(AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE),
+                                             WithSource(AINPUT_SOURCE_MOUSE))));
 
     // Tap on the window
     motionArgs = generateMotionArgs(AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_TOUCHSCREEN,
                                     ADISPLAY_ID_DEFAULT, {{10, 10}});
     mDispatcher->notifyMotion(&motionArgs);
     ASSERT_NO_FATAL_FAILURE(
-            window->consumeMotionEvent(AllOf(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_EXIT),
-                                             WithSource(AINPUT_SOURCE_MOUSE))));
-
-    ASSERT_NO_FATAL_FAILURE(
             window->consumeMotionEvent(AllOf(WithMotionAction(AMOTION_EVENT_ACTION_DOWN),
                                              WithSource(AINPUT_SOURCE_TOUCHSCREEN))));
 
@@ -2420,6 +2393,7 @@
                                                          .y(600))
                                         .build()));
     windowDefaultDisplay->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_ENTER));
+    windowDefaultDisplay->consumeMotionEvent(WithMotionAction(AMOTION_EVENT_ACTION_HOVER_MOVE));
 
     // Remove all windows in secondary display and check that no event happens on window in
     // primary display.