Merge PR #7849: Mark the recovery key as sensitive when copying it to the clipboard

features/securebackup/impl/src/main/kotlin/io/element/android/features/securebackup/impl/setup/SecureBackupSetupView.kt

@@ -122,6 +122,7 @@ private fun Content(
             context.copyToClipboard(
                 text = formattedRecoveryKey,
                 toastMessage = toastMessage,
+                isSensitive = true,
             )
             state.eventSink.invoke(SecureBackupSetupEvent.RecoveryKeyHasBeenSaved)
         }

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/system/CopyToClipboardUseCase.kt

@@ -9,15 +9,35 @@
 package io.element.android.libraries.androidutils.system
 
 import android.content.ClipData
+import android.content.ClipDescription
 import android.content.ClipboardManager
 import android.content.Context
+import android.os.Build
+import android.os.PersistableBundle
 import androidx.core.content.getSystemService
 
 class CopyToClipboardUseCase(
     private val context: Context,
 ) {
-    fun execute(text: CharSequence) {
-        context.getSystemService<ClipboardManager>()
-            ?.setPrimaryClip(ClipData.newPlainText("", text))
+    /**
+     * @param isSensitive if true, the clip is flagged so the system clipboard preview (Android 13+) and keyboards hide its content.
+     */
+    fun execute(text: CharSequence, isSensitive: Boolean = false) {
+        val clipData = ClipData.newPlainText("", text)
+        if (isSensitive) {
+            clipData.description.extras = PersistableBundle().apply {
+                putBoolean(EXTRA_IS_SENSITIVE, true)
+            }
+        }
+        context.getSystemService<ClipboardManager>()?.setPrimaryClip(clipData)
+    }
+
+    private companion object {
+        // The constant only exists from API 33, but the documentation recommends using its value on older versions too.
+        val EXTRA_IS_SENSITIVE = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            ClipDescription.EXTRA_IS_SENSITIVE
+        } else {
+            "android.content.extra.IS_SENSITIVE"
+        }
     }
 }

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/system/SystemUtils.kt

@@ -63,9 +63,10 @@ fun Context.getVersionCodeFromManifest(): Long {
  */
 fun Context.copyToClipboard(
     text: CharSequence,
-    toastMessage: String? = null
+    toastMessage: String? = null,
+    isSensitive: Boolean = false,
 ) {
-    CopyToClipboardUseCase(this).execute(text)
+    CopyToClipboardUseCase(this).execute(text, isSensitive)
     toastMessage?.let { toast(it) }
 }