Simple InMemoryPersister API

gistfile1.txt

Subject: [PATCH] InMemoryPersister
---
Index: mobile/android/fenix/app/src/main/java/org/mozilla/fenix/FenixApplication.kt
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/FenixApplication.kt b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/FenixApplication.kt
--- a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/FenixApplication.kt	(revision 12123e5f77b7ee854fd6ac2fee99257866e0b4f1)
+++ b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/FenixApplication.kt	(date 1765825487087)
@@ -124,16 +124,29 @@
 private const val RAM_THRESHOLD_MEGABYTES = 1024
 private const val BYTES_TO_MEGABYTES_CONVERSION = 1024.0 * 1024.0
 
+interface InMemoryPersister {
+    operator fun <T> get(key: String): T?
+    operator fun <T> set(key: String, value: T)
+}
+
 /**
  * The main application class for Fenix. Records data to measure initialization performance.
  * Installs [CrashReporter], initializes [Glean] in fenix builds and setup [Megazord] in the main process.
  */
 @Suppress("Registered", "TooManyFunctions", "LargeClass")
-open class FenixApplication : LocaleAwareApplication(), Provider {
+open class FenixApplication : LocaleAwareApplication(), Provider, InMemoryPersister {
     init {
         recordOnInit() // DO NOT MOVE ANYTHING ABOVE HERE: the timing of this measurement is critical.
     }
 
+    private val inMemoryData = mutableMapOf<String, Any>()
+    @Suppress("UNCHECKED_CAST")
+    override fun <T> get(key: String) = inMemoryData[key] as? T
+
+    override fun <T> set(key: String, value: T) {
+        inMemoryData[key] = value as Any
+    }
+
     private val logger = Logger("FenixApplication")
 
     internal val isDeviceRamAboveThreshold by lazy {
Index: mobile/android/fenix/app/src/main/java/org/mozilla/fenix/tabstray/ui/TabManagementFragment.kt
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/tabstray/ui/TabManagementFragment.kt b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/tabstray/ui/TabManagementFragment.kt
--- a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/tabstray/ui/TabManagementFragment.kt	(revision 12123e5f77b7ee854fd6ac2fee99257866e0b4f1)
+++ b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/tabstray/ui/TabManagementFragment.kt	(date 1765823980345)
@@ -10,6 +10,7 @@
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.activity.compose.BackHandler
 import androidx.activity.result.ActivityResultLauncher
 import androidx.annotation.UiThread
@@ -23,6 +24,7 @@
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalDensity
 import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.fragment.app.setFragmentResultListener
 import androidx.fragment.compose.content
@@ -53,8 +55,10 @@
 import org.mozilla.fenix.GleanMetrics.PrivateBrowsingLocked
 import org.mozilla.fenix.GleanMetrics.TabsTray
 import org.mozilla.fenix.HomeActivity
+import org.mozilla.fenix.InMemoryPersister
 import org.mozilla.fenix.R
 import org.mozilla.fenix.ext.actualInactiveTabs
+import org.mozilla.fenix.ext.application
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.getBottomToolbarHeight
 import org.mozilla.fenix.ext.getTopToolbarHeight
@@ -98,8 +102,12 @@
 import org.mozilla.fenix.theme.ThemeManager
 import org.mozilla.fenix.utils.Settings
 import org.mozilla.fenix.utils.getSnackbarTimeout
+import kotlin.let
 import kotlin.math.abs
 
+val Fragment.inMemoryPersister
+    get() = (requireContext().application as? InMemoryPersister)
+
 /**
  * The fullscreen fragment for displaying the tabs management UI.
  */
@@ -523,6 +531,15 @@
     override fun onResume() {
         super.onResume()
         hideToolbar()
+        inMemoryPersister?.let {
+            val persistedText: String? = it["test"]
+            if (persistedText != null) {
+                Toast.makeText(requireContext(), persistedText, Toast.LENGTH_LONG).show()
+            } else {
+                it["test"] = "Persisted message: It works"
+                Toast.makeText(requireContext(), "Just persisted a new message", Toast.LENGTH_LONG).show()
+            }
+        }
     }
 
     private fun onCancelDownloadWarningAccepted(tabId: String?, source: String?) {