Adds an flag guarded extension point for long press nav handle behavior

Bug: 282993230
Flag: ENABLE_LONG_PRESS_NAV_HANDLE disabled
Test: Manual

Change-Id: I541886cc13af1db46bc38d4e18556be99bef7713

quickstep/res/values/dimens.xml

@@ -269,6 +269,9 @@
     <dimen name="floating_rotation_button_taskbar_left_margin">20dp</dimen>
     <dimen name="floating_rotation_button_taskbar_bottom_margin">10dp</dimen>
 
+    <!-- Copied from frameworks/base/packages/SystemUI -->
+    <dimen name="navigation_home_handle_width">108dp</dimen>
+
     <!-- Taskbar -->
     <dimen name="taskbar_size">@*android:dimen/taskbar_frame_height</dimen>
     <dimen name="taskbar_ime_size">48dp</dimen>

quickstep/res/values/override.xml

@@ -25,6 +25,8 @@
 
   <string name="model_delegate_class" translatable="false">com.android.launcher3.model.QuickstepModelDelegate</string>
 
+  <string name="nav_handle_long_press_handler_class" translatable="false"></string>
+
   <string name="secondary_display_predictions_class" translatable="false">com.android.launcher3.secondarydisplay.SecondaryDisplayPredictionsImpl</string>
 
 </resources>

quickstep/src/com/android/quickstep/InputConsumer.java

@@ -42,6 +42,7 @@ public interface InputConsumer {
     int TYPE_TASKBAR_STASH = 1 << 12;
     int TYPE_STATUS_BAR = 1 << 13;
     int TYPE_CURSOR_HOVER = 1 << 14;
+    int TYPE_NAV_HANDLE_LONG_PRESS = 1 << 15;
 
     String[] NAMES = new String[] {
            "TYPE_NO_OP",                    // 0
@@ -59,6 +60,7 @@ public interface InputConsumer {
             "TYPE_TASKBAR_STASH",           // 12
             "TYPE_STATUS_BAR",              // 13
             "TYPE_CURSOR_HOVER",            // 14
+            "TYPE_NAV_HANDLE_LONG_PRESS",   // 15
     };
 
     InputConsumer NO_OP = () -> TYPE_NO_OP;

quickstep/src/com/android/quickstep/TouchInteractionService.java

@@ -105,6 +105,7 @@ import com.android.launcher3.util.TraceHelper;
 import com.android.quickstep.inputconsumers.AccessibilityInputConsumer;
 import com.android.quickstep.inputconsumers.AssistantInputConsumer;
 import com.android.quickstep.inputconsumers.DeviceLockedInputConsumer;
+import com.android.quickstep.inputconsumers.NavHandleLongPressInputConsumer;
 import com.android.quickstep.inputconsumers.OneHandedModeInputConsumer;
 import com.android.quickstep.inputconsumers.OtherActivityInputConsumer;
 import com.android.quickstep.inputconsumers.OverviewInputConsumer;
@@ -884,6 +885,8 @@ public class TouchInteractionService extends Service
                                     + "using TaskbarUnstashInputConsumer");
                     base = new TaskbarUnstashInputConsumer(this, base, mInputMonitorCompat, tac);
                 }
+            } else if (canStartSystemGesture && FeatureFlags.ENABLE_LONG_PRESS_NAV_HANDLE.get()) {
+                base = new NavHandleLongPressInputConsumer(this, base, mInputMonitorCompat);
             }
 
             if (mDeviceState.isBubblesExpanded()) {

quickstep/src/com/android/quickstep/inputconsumers/NavHandleLongPressHandler.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2023 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.quickstep.inputconsumers;
+
+import android.content.Context;
+
+import com.android.launcher3.R;
+import com.android.launcher3.util.ResourceBasedOverride;
+
+/**
+ * Class for extending nav handle long press behavior
+ */
+public class NavHandleLongPressHandler implements ResourceBasedOverride {
+
+    /** Creates NavHandleLongPressHandler as specified by overrides */
+    public static NavHandleLongPressHandler newInstance(Context context) {
+        return Overrides.getObject(NavHandleLongPressHandler.class, context,
+                R.string.nav_handle_long_press_handler_class);
+    }
+
+    /**
+     * Called when nav handle is long pressed.
+     *
+     * @return if the long press was consumed, meaning other input consumers should receive a
+     * cancel event
+     */
+    public boolean onLongPress() {
+        return false;
+    }
+}

quickstep/src/com/android/quickstep/inputconsumers/NavHandleLongPressInputConsumer.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2023 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.quickstep.inputconsumers;
+
+import android.content.Context;
+import android.view.GestureDetector;
+import android.view.GestureDetector.SimpleOnGestureListener;
+import android.view.MotionEvent;
+
+import com.android.launcher3.R;
+import com.android.launcher3.util.DisplayController;
+import com.android.quickstep.InputConsumer;
+import com.android.systemui.shared.system.InputMonitorCompat;
+
+/**
+ * Listens for a long press
+ */
+public class NavHandleLongPressInputConsumer extends DelegateInputConsumer {
+
+    private final GestureDetector mLongPressDetector;
+    private final NavHandleLongPressHandler mNavHandleLongPressHandler;
+    private final float mNavHandleWidth;
+    private final float mScreenWidth;
+
+    public NavHandleLongPressInputConsumer(Context context, InputConsumer delegate,
+            InputMonitorCompat inputMonitor) {
+        super(delegate, inputMonitor);
+        mNavHandleWidth = context.getResources()
+                .getDimensionPixelSize(R.dimen.navigation_home_handle_width);
+        mScreenWidth = DisplayController.INSTANCE.get(context).getInfo().currentSize.x;
+
+        mNavHandleLongPressHandler = NavHandleLongPressHandler.newInstance(context);
+
+        mLongPressDetector = new GestureDetector(context, new SimpleOnGestureListener() {
+            @Override
+            public void onLongPress(MotionEvent motionEvent) {
+                if (isInArea(motionEvent.getRawX())) {
+                    if (mNavHandleLongPressHandler.onLongPress()) {
+                        setActive(motionEvent);
+                    }
+                }
+            }
+        });
+    }
+
+    @Override
+    public int getType() {
+        return TYPE_NAV_HANDLE_LONG_PRESS | mDelegate.getType();
+    }
+
+    @Override
+    public void onMotionEvent(MotionEvent ev) {
+        mLongPressDetector.onTouchEvent(ev);
+        if (mState != STATE_ACTIVE) {
+            mDelegate.onMotionEvent(ev);
+        }
+    }
+
+    protected boolean isInArea(float x) {
+        float areaFromMiddle = mNavHandleWidth / 2.0f;
+        float distFromMiddle = Math.abs(mScreenWidth / 2.0f - x);
+
+        return distFromMiddle < areaFromMiddle;
+    }
+}

src/com/android/launcher3/config/FeatureFlags.java

@@ -253,6 +253,10 @@ public final class FeatureFlags {
             "INJECT_FALLBACK_APP_CORPUS_RESULTS", DISABLED,
             "Inject fallback app corpus result when AiAi fails to return it.");
 
+    public static final BooleanFlag ENABLE_LONG_PRESS_NAV_HANDLE =
+            getDebugFlag(282993230, "ENABLE_LONG_PRESS_NAV_HANDLE", DISABLED,
+                    "Enables long pressing on the bottom bar nav handle to trigger events.");
+
     // TODO(Block 17): Clean up flags
     public static final BooleanFlag ENABLE_TASKBAR_PINNING = getDebugFlag(270396583,
             "ENABLE_TASKBAR_PINNING", DISABLED,