From 2e17cd6cd8f445296c8fe2cd8f7faa97354a1aba Mon Sep 17 00:00:00 2001
From: burakov <burakov@google.com>
Date: Fri, 14 Jul 2023 19:44:51 +0000
Subject: [PATCH] [flexiglass] Enable toggling legacy SysUI on/off.

To manually toggle legacy SysUI on/off, top 5 times in quick succession
on the device camera (top center). That particular spot was chosen
because it's the least likely one to have actual UI tap targets
underneath that the toggle would interfere with.

Note: due to b/290984671, the tap target after initial unlock moves
directly below the camera.

Fix: 290927217
Test: manually verified by tapping on the camera to toggle the UI on and
off.

Change-Id: I0d7d905a31842a8450436472a0a94d9e58bc2fda
---
 .../ui/view/SceneWindowRootViewBinder.kt      | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
index 5aa5feeedcf12..f9324a95c1e54 100644
--- a/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
+++ b/packages/SystemUI/src/com/android/systemui/scene/ui/view/SceneWindowRootViewBinder.kt
@@ -16,19 +16,25 @@
 
 package com.android.systemui.scene.ui.view
 
+import android.view.Gravity
+import android.view.View
 import android.view.ViewGroup
+import android.widget.FrameLayout
 import androidx.activity.OnBackPressedDispatcher
 import androidx.activity.OnBackPressedDispatcherOwner
 import androidx.activity.setViewTreeOnBackPressedDispatcherOwner
+import androidx.core.view.isVisible
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
+import com.android.systemui.R
 import com.android.systemui.compose.ComposeFacade
 import com.android.systemui.lifecycle.repeatWhenAttached
 import com.android.systemui.scene.shared.model.Scene
 import com.android.systemui.scene.shared.model.SceneContainerConfig
 import com.android.systemui.scene.shared.model.SceneKey
 import com.android.systemui.scene.ui.viewmodel.SceneContainerViewModel
+import java.time.Instant
 import kotlinx.coroutines.launch
 
 object SceneWindowRootViewBinder {
@@ -77,6 +83,9 @@ object SceneWindowRootViewBinder {
                         )
                     )
 
+                    val legacyView = view.requireViewById<View>(R.id.legacy_window_root)
+                    view.addView(createVisibilityToggleView(legacyView))
+
                     launch {
                         viewModel.isVisible.collect { isVisible ->
                             onVisibilityChangedInternal(isVisible)
@@ -89,4 +98,28 @@ object SceneWindowRootViewBinder {
             }
         }
     }
+
+    private var clickCount = 0
+    private var lastClick = Instant.now()
+
+    /**
+     * A temporary UI to toggle on/off the visibility of the given [otherView]. It is toggled by
+     * tapping 5 times in quick succession on the device camera (top center).
+     */
+    // TODO(b/291321285): Remove this when the Flexiglass UI is mature enough to turn off legacy
+    //  SysUI altogether.
+    private fun createVisibilityToggleView(otherView: View): View {
+        val toggleView = View(otherView.context)
+        toggleView.layoutParams = FrameLayout.LayoutParams(200, 200, Gravity.CENTER_HORIZONTAL)
+        toggleView.setOnClickListener {
+            val now = Instant.now()
+            clickCount = if (now.minusSeconds(2) > lastClick) 1 else clickCount + 1
+            if (clickCount == 5) {
+                otherView.isVisible = !otherView.isVisible
+                clickCount = 0
+            }
+            lastClick = now
+        }
+        return toggleView
+    }
 }