From 7c464a7759d4811839a4eb72d716c85ec53e807f Mon Sep 17 00:00:00 2001
From: Cody Henthorne <cody@signal.org>
Date: Mon, 20 Jul 2026 11:21:25 -0400
Subject: [PATCH] Never sync trim deletes from linked devices.

---
 .../app/storage/ManageStorageSettingsFragment.kt   | 14 ++++++++------
 .../app/storage/ManageStorageSettingsViewModel.kt  |  6 ++++--
 .../securesms/keyvalue/SettingsValues.java         |  2 +-
 3 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsFragment.kt b/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsFragment.kt
index 991a9a6b62..2c30edaa24 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsFragment.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsFragment.kt
@@ -334,12 +334,14 @@ private fun ManageStorageSettingsScreen(
         onClick = onSetChatLengthLimit
       )
 
-      Rows.ToggleRow(
-        text = stringResource(id = R.string.ManageStorageSettingsFragment_apply_limits_title),
-        label = stringResource(id = R.string.ManageStorageSettingsFragment_apply_limits_description),
-        checked = state.syncTrimDeletes,
-        onCheckChanged = onSyncTrimThreadDeletes
-      )
+      if (state.isPrimary) {
+        Rows.ToggleRow(
+          text = stringResource(id = R.string.ManageStorageSettingsFragment_apply_limits_title),
+          label = stringResource(id = R.string.ManageStorageSettingsFragment_apply_limits_description),
+          checked = state.syncTrimDeletes,
+          onCheckChanged = onSyncTrimThreadDeletes
+        )
+      }
 
       Dividers.Default()
 
diff --git a/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsViewModel.kt b/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsViewModel.kt
index 974659e24b..25996da2bd 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsViewModel.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/components/settings/app/storage/ManageStorageSettingsViewModel.kt
@@ -36,7 +36,8 @@ class ManageStorageSettingsViewModel : ViewModel() {
       keepMessagesDuration = SignalStore.settings.keepMessagesDuration,
       lengthLimit = if (SignalStore.settings.isTrimByLengthEnabled) SignalStore.settings.threadTrimLength else ManageStorageState.NO_LIMIT,
       syncTrimDeletes = SignalStore.settings.shouldSyncThreadTrimDeletes(),
-      localBackupsEnabled = SignalStore.backup.newLocalBackupsEnabled
+      localBackupsEnabled = SignalStore.backup.newLocalBackupsEnabled,
+      isPrimary = SignalStore.account.isPrimaryDevice
     )
   )
   val state = store.asStateFlow()
@@ -182,7 +183,8 @@ class ManageStorageSettingsViewModel : ViewModel() {
     val onDeviceStorageOptimizationState: OnDeviceStorageOptimizationState = OnDeviceStorageOptimizationState.FEATURE_NOT_AVAILABLE,
     val storageOptimizationStateChanged: Boolean = false,
     val isPaidTierPending: Boolean = false,
-    val localBackupsEnabled: Boolean = false
+    val localBackupsEnabled: Boolean = false,
+    val isPrimary: Boolean = true
   ) {
     companion object {
       const val NO_LIMIT = 0
diff --git a/app/src/main/java/org/thoughtcrime/securesms/keyvalue/SettingsValues.java b/app/src/main/java/org/thoughtcrime/securesms/keyvalue/SettingsValues.java
index d7d265b8d7..125cc28a32 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/keyvalue/SettingsValues.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/keyvalue/SettingsValues.java
@@ -197,7 +197,7 @@ public final class SettingsValues extends SignalStoreValues {
       setSyncThreadTrimDeletes(!isTrimByLengthEnabled() && getKeepMessagesDuration() == KeepMessagesDuration.FOREVER);
     }
 
-    return getBoolean(THREAD_TRIM_SYNC_TO_LINKED_DEVICES, true);
+    return getBoolean(THREAD_TRIM_SYNC_TO_LINKED_DEVICES, true) && SignalStore.account().isPrimaryDevice();
   }
 
   public void setSyncThreadTrimDeletes(boolean syncDeletes) {