Content Scanning View (#5831)

* implement a MediaView to delegate at the view level the usage of the content scanner service, to determine how to render the media.

* fix for a small design mismatch

* fix for greedy error state

* updated naming

* just making some screenshot that have been affected by a string change on Localazy

* pr suggestions + updated strings

AccessibilityTests/Sources/GeneratedAccessibilityTests.swift

@@ -99,6 +99,10 @@ extension AccessibilityTests {
         try await performAccessibilityAudit(named: "ComposerToolbar_Previews")
     }
 
+    func testContentScanningFailureView() async throws {
+        try await performAccessibilityAudit(named: "ContentScanningFailureView_Previews")
+    }
+
     func testCopyTextButton() async throws {
         try await performAccessibilityAudit(named: "CopyTextButton_Previews")
     }

ElementX.xcodeproj/project.pbxproj

@@ -145,6 +145,7 @@
 		15913A5B07118C1268A840E4 /* RoomSummaryTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 046C0D3F53B0B5EF0A1F5BEA /* RoomSummaryTests.swift */; };
 		1621BF6316FFFEF5AE067C77 /* Avatars.swift in Sources */ = {isa = PBXBuildFile; fileRef = C142248014E08E885E323E56 /* Avatars.swift */; };
 		1653275750CE11F5CE94DDFD /* ReadReceiptsSummaryView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8063E65441E771200108C558 /* ReadReceiptsSummaryView.swift */; };
+		166D52EC67BD7586050BFB8D /* ContentScannerServiceMock.swift in Sources */ = {isa = PBXBuildFile; fileRef = EC446234C8E5031F36F1BBE2 /* ContentScannerServiceMock.swift */; };
 		167D00CAA13FAFB822298021 /* MediaProviderTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 62A81CCC2516D9CF9322DF01 /* MediaProviderTests.swift */; };
 		167D5024DB9D44197AEA0507 /* HomeScreenNewSoundBanner.swift in Sources */ = {isa = PBXBuildFile; fileRef = BD5480F03306234FC086E93B /* HomeScreenNewSoundBanner.swift */; };
 		16A1F6C703305FCAF4E14EC6 /* TimelineProxyMock.swift in Sources */ = {isa = PBXBuildFile; fileRef = 17A8AA0DFA06012A9DAB951E /* TimelineProxyMock.swift */; };
@@ -630,6 +631,7 @@
 		67FEA7157FA1B39DFC533C78 /* LeaveSpaceViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E5A65B5A000E7237AC61C67 /* LeaveSpaceViewModel.swift */; };
 		6817EAD73DC1FFD8B943B5B9 /* HomeScreenRoomTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B73587C2E3CF5998361AE516 /* HomeScreenRoomTests.swift */; };
 		68184EF36396424FE19A727D /* MediaLoader.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8AFCE895ECFFA53FEE64D62B /* MediaLoader.swift */; };
+		681FA9A37E82A14EDFB22D56 /* ContentScanningView.swift in Sources */ = {isa = PBXBuildFile; fileRef = C8794B3D86D7D444B9B6FF7B /* ContentScanningView.swift */; };
 		6832733838C57A7D3FE8FEB5 /* Kingfisher in Frameworks */ = {isa = PBXBuildFile; productRef = 50009897F60FAE7D63EF5E5B /* Kingfisher */; };
 		6851B077B4C913CC12DB6E77 /* AppLockFlowCoordinator.swift in Sources */ = {isa = PBXBuildFile; fileRef = FCE93F0CBF0D96B77111C413 /* AppLockFlowCoordinator.swift */; };
 		6885C3D26FC1026E07408D3C /* RoomListActivityVisibility.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5DA892E8643240C7BC41900 /* RoomListActivityVisibility.swift */; };
@@ -969,6 +971,7 @@
 		9D79B94493FB32249F7E472F /* PlaceholderAvatarImage.swift in Sources */ = {isa = PBXBuildFile; fileRef = C705E605EF57C19DBE86FFA1 /* PlaceholderAvatarImage.swift */; };
 		9D9690D2FD4CD26FF670620F /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C75EF87651B00A176AB08E97 /* AppDelegate.swift */; };
 		9DBF6524DFD8143A4D6A17F0 /* CreateRoomScreenModels.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0D432771B389EC486E7F90C6 /* CreateRoomScreenModels.swift */; };
+		9DD0DFFEFCA51AE241B637D1 /* ContentScanningFailureView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5A8442B74248E2839BA6FFF0 /* ContentScanningFailureView.swift */; };
 		9DD5AA10E85137140FEA86A3 /* MediaProvider.swift in Sources */ = {isa = PBXBuildFile; fileRef = F17EFA1D3D09FC2F9C5E1CB2 /* MediaProvider.swift */; };
 		9DD84E014ADFB2DD813022D5 /* RoomDetailsEditScreenViewModelTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 00E5B2CBEF8F96424F095508 /* RoomDetailsEditScreenViewModelTests.swift */; };
 		9DE801D278AC34737467F937 /* VoiceMessageMediaManagerProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 889DEDD63C68ABDA8AD29812 /* VoiceMessageMediaManagerProtocol.swift */; };
@@ -2174,6 +2177,7 @@
 		5A37E2FACFD041CE466223CD /* SceneDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
 		5A43964330459965AF048A8C /* LoginScreenViewModelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LoginScreenViewModelTests.swift; sourceTree = "<group>"; };
 		5A70B03471F6027C90EE868C /* RoomMembersFlowCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomMembersFlowCoordinator.swift; sourceTree = "<group>"; };
+		5A8442B74248E2839BA6FFF0 /* ContentScanningFailureView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentScanningFailureView.swift; sourceTree = "<group>"; };
 		5AEA0B743847CFA5B3C38EE4 /* RoomMembersListScreenCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomMembersListScreenCoordinator.swift; sourceTree = "<group>"; };
 		5B2A2B168C8DC14A1A9D1C64 /* NotificationToneManagerProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationToneManagerProtocol.swift; sourceTree = "<group>"; };
 		5B8F0ED874DF8C9A51B0AB6F /* SettingsScreenCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SettingsScreenCoordinator.swift; sourceTree = "<group>"; };
@@ -2799,6 +2803,7 @@
 		C7661EFFCAA307A97D71132A /* HomeScreenRoomList.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HomeScreenRoomList.swift; sourceTree = "<group>"; };
 		C79C2C6E7F66646D1D254927 /* RoomLiveLocationServiceMock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomLiveLocationServiceMock.swift; sourceTree = "<group>"; };
 		C830A64609CBD152F06E0457 /* NotificationConstants.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationConstants.swift; sourceTree = "<group>"; };
+		C8794B3D86D7D444B9B6FF7B /* ContentScanningView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentScanningView.swift; sourceTree = "<group>"; };
 		C90514BE9B8ACCBCF0AD2489 /* ComposerToolbarViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ComposerToolbarViewModel.swift; sourceTree = "<group>"; };
 		C95ADE8D9527523572532219 /* hu */ = {isa = PBXFileReference; lastKnownFileType = text.plist.stringsdict; name = hu; path = hu.lproj/Localizable.stringsdict; sourceTree = "<group>"; };
 		C97F8963B14EB0AF3940DDBF /* NotificationSettingsEditScreenRoomCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NotificationSettingsEditScreenRoomCell.swift; sourceTree = "<group>"; };
@@ -2993,6 +2998,7 @@
 		EBD21AF0131AA38FF9534FAD /* EditRoomAddressScreenModels.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditRoomAddressScreenModels.swift; sourceTree = "<group>"; };
 		EBE5502760CF6CA2D7201883 /* ja */ = {isa = PBXFileReference; lastKnownFileType = text.plist.stringsdict; name = ja; path = ja.lproj/Localizable.stringsdict; sourceTree = "<group>"; };
 		EBEB8D9F4940E161B18FE4BC /* UITestsNotificationCenter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UITestsNotificationCenter.swift; sourceTree = "<group>"; };
+		EC446234C8E5031F36F1BBE2 /* ContentScannerServiceMock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentScannerServiceMock.swift; sourceTree = "<group>"; };
 		EC589E641AE46EFB2962534D /* RoomMemberDetailsViewModelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RoomMemberDetailsViewModelTests.swift; sourceTree = "<group>"; };
 		ECB836DD8BE31931F51B8AC9 /* EncryptionSettingsFlowCoordinator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EncryptionSettingsFlowCoordinator.swift; sourceTree = "<group>"; };
 		ECBBCD7444C2B515D02EC0E8 /* IdentityConfirmationScreenViewModelTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IdentityConfirmationScreenViewModelTests.swift; sourceTree = "<group>"; };
@@ -3839,6 +3845,7 @@
 				E2F96CCBEAAA7F2185BFA354 /* ClientProxyMock.swift */,
 				C723327DC4A3093CD9675B27 /* CLLocationManagerMock.swift */,
 				4E600B315B920B9687F8EE1B /* ComposerDraftServiceMock.swift */,
+				EC446234C8E5031F36F1BBE2 /* ContentScannerServiceMock.swift */,
 				86E1BAA7232081635662A83F /* CXProviderMock.swift */,
 				E321E840DCC63790049984F4 /* ElementCallServiceMock.swift */,
 				3A21027F05874B1BCC3E452B /* InvitedRoomProxyMock.swift */,
@@ -3901,6 +3908,7 @@
 				C1FA515B3B0D61EF1E907D2D /* BadgeView.swift */,
 				07934EF08BB39353E4A94272 /* BlurEffectView.swift */,
 				FEC4B431B0117BDEE697DB4A /* ComposerDisabledView.swift */,
+				C8794B3D86D7D444B9B6FF7B /* ContentScanningView.swift */,
 				B682FE2C44C5E163E7023B05 /* CopyTextButton.swift */,
 				89D7846847BA9D2C5346ED9C /* EditAvatarButtonStyle.swift */,
 				E2776E63E02719B20758EB78 /* EditRoomAddressListRow.swift */,
@@ -6516,6 +6524,7 @@
 				664ABD745A746C45CB842158 /* CallInviteRoomTimelineView.swift */,
 				AD6E082B0507FB28F966516A /* CallNotificationRoomTimelineView.swift */,
 				BFBF273BC2BFB9F3EEFA988B /* CollapsibleRoomTimelineView.swift */,
+				5A8442B74248E2839BA6FFF0 /* ContentScanningFailureView.swift */,
 				44ABA63DBE7F76C58260B43B /* EmoteRoomTimelineView.swift */,
 				2F06F70B9C433BAD4BC6B9F5 /* EncryptedRoomTimelineView.swift */,
 				4F75EF13F49DD2204E760910 /* FileRoomTimelineView.swift */,
@@ -8382,7 +8391,10 @@
 				9ED768A43A2A302F9812C5DF /* ContentScannerProxy.swift in Sources */,
 				32BFB9B4D2EC46196537B72F /* ContentScannerProxyProtocol.swift in Sources */,
 				E52F1E00FBAABA703DA510F9 /* ContentScannerService.swift in Sources */,
+				166D52EC67BD7586050BFB8D /* ContentScannerServiceMock.swift in Sources */,
 				E8F88136C8E69D9E69621E19 /* ContentScannerServiceProtocol.swift in Sources */,
+				9DD0DFFEFCA51AE241B637D1 /* ContentScanningFailureView.swift in Sources */,
+				681FA9A37E82A14EDFB22D56 /* ContentScanningView.swift in Sources */,
 				73DBE886625AF56FF08D7F76 /* CoordinateAnimator.swift in Sources */,
 				C3522917C0C367C403429EEC /* CoordinatorProtocol.swift in Sources */,
 				633501761094E09DFBEBFFAD /* CopyTextButton.swift in Sources */,

ElementX/Resources/Localizations/en-US.lproj/Localizable.strings

@@ -2,6 +2,7 @@
 "a11y_add_reaction" = "Add reaction: %1$@";
 "a11y_address" = "Address";
 "a11y_avatar" = "Avatar";
+"a11y_clear_search_field" = "Clear search field";
 "a11y_collapse_message_text_field" = "Minimize message text field";
 "a11y_create_poll_votes_allowed_decrease" = "Decrease votes allowed per person";
 "a11y_create_poll_votes_allowed_increase" = "Increase votes allowed per person";
@@ -36,9 +37,9 @@
 "a11y_qr_code" = "QR Code";
 "a11y_react_with" = "React with %1$@";
 "a11y_react_with_other_emojis" = "React with other emojis";
-"a11y_read_receipts_multiple" = "Read by %1$@ and %2$@";
+"a11y_read_receipts_multiple" = "Previous message read by %1$@ and %2$@";
-"a11y_read_receipts_single" = "Read by %1$@";
+"a11y_read_receipts_single" = "Previous message read by %1$@";
-"a11y_read_receipts_tap_to_show_all" = "Tap to show all";
+"a11y_read_receipts_tap_to_show_all_ios" = "Tap to show all";
 "a11y_remove_reaction" = "Remove reaction: %1$@";
 "a11y_remove_reaction_with" = "Remove reaction with %1$@";
 "a11y_send_files" = "Send files";
@@ -408,6 +409,10 @@
 "confirm_recovery_key_banner_primary_button_title" = "Enter your recovery key";
 "confirm_recovery_key_banner_secondary_button_title" = "Forgot your recovery key?";
 "confirm_recovery_key_banner_title" = "Your key storage is out of sync";
+"content_scanner_not_found" = "Download not available.";
+"content_scanner_not_found_title" = "File not found";
+"content_scanner_unsafe_message" = "Preview and download have been disabled.";
+"content_scanner_unsafe_title" = "The file is not safe";
 "crash_detection_dialog_content" = "%1$@ crashed the last time it was used. Would you like to share a crash report with us?";
 "crypto_event_authenticity_mismatched_sender" = "The sender of the event does not match the owner of the device that sent it.";
 "crypto_event_authenticity_not_guaranteed" = "The authenticity of this encrypted message can't be guaranteed on this device.";
@@ -1030,7 +1035,7 @@
 "screen_notification_settings_edit_custom_settings_section_title" = "Custom setting per chat";
 "screen_notification_settings_edit_failed_updating_default_mode" = "An error occurred while updating the notification setting.";
 "screen_notification_settings_edit_mode_all_messages" = "All messages";
-"screen_notification_settings_edit_mode_mentions_and_keywords" = "Mentions and Keywords only";
+"screen_notification_settings_edit_mode_mentions_and_keywords" = "Mentions and replies only";
 "screen_notification_settings_edit_screen_direct_section_header" = "On direct chats, notify me for";
 "screen_notification_settings_edit_screen_group_section_header" = "On group chats, notify me for";
 "screen_notification_settings_enable_notifications" = "Enable notifications on this device";
@@ -1336,7 +1341,7 @@
 "screen_room_notification_settings_error_setting_mode" = "Failed setting the mode, please try again.";
 "screen_room_notification_settings_mentions_only_disclaimer" = "Your homeserver does not support this option in encrypted rooms, you won't get notified in this room.";
 "screen_room_notification_settings_mode_all_messages" = "All messages";
-"screen_room_notification_settings_mode_mentions_and_keywords" = "Mentions and Keywords only";
+"screen_room_notification_settings_mode_mentions_and_keywords" = "Mentions and replies only";
 "screen_room_notification_settings_room_custom_settings_title" = "In this room, notify me for";
 "screen_room_pinned_banner_indicator" = "%1$@ of %2$@";
 "screen_room_pinned_banner_indicator_description" = "%1$@ Pinned messages";

ElementX/Resources/Localizations/en.lproj/Localizable.strings

@@ -2,6 +2,7 @@
 "a11y_add_reaction" = "Add reaction: %1$@";
 "a11y_address" = "Address";
 "a11y_avatar" = "Avatar";
+"a11y_clear_search_field" = "Clear search field";
 "a11y_collapse_message_text_field" = "Minimise message text field";
 "a11y_create_poll_votes_allowed_decrease" = "Decrease votes allowed per person";
 "a11y_create_poll_votes_allowed_increase" = "Increase votes allowed per person";
@@ -36,9 +37,9 @@
 "a11y_qr_code" = "QR Code";
 "a11y_react_with" = "React with %1$@";
 "a11y_react_with_other_emojis" = "React with other emojis";
-"a11y_read_receipts_multiple" = "Read by %1$@ and %2$@";
+"a11y_read_receipts_multiple" = "Previous message read by %1$@ and %2$@";
-"a11y_read_receipts_single" = "Read by %1$@";
+"a11y_read_receipts_single" = "Previous message read by %1$@";
-"a11y_read_receipts_tap_to_show_all" = "Tap to show all";
+"a11y_read_receipts_tap_to_show_all_ios" = "Tap to show all";
 "a11y_remove_reaction" = "Remove reaction: %1$@";
 "a11y_remove_reaction_with" = "Remove reaction with %1$@";
 "a11y_send_files" = "Send files";
@@ -408,6 +409,10 @@
 "confirm_recovery_key_banner_primary_button_title" = "Enter your recovery key";
 "confirm_recovery_key_banner_secondary_button_title" = "Forgot your recovery key?";
 "confirm_recovery_key_banner_title" = "Your key storage is out of sync";
+"content_scanner_not_found" = "Download not available.";
+"content_scanner_not_found_title" = "File not found";
+"content_scanner_unsafe_message" = "Preview and download have been disabled.";
+"content_scanner_unsafe_title" = "The file is not safe";
 "crash_detection_dialog_content" = "%1$@ crashed the last time it was used. Would you like to share a crash report with us?";
 "crypto_event_authenticity_mismatched_sender" = "The sender of the event does not match the owner of the device that sent it.";
 "crypto_event_authenticity_not_guaranteed" = "The authenticity of this encrypted message can't be guaranteed on this device.";
@@ -1030,7 +1035,7 @@
 "screen_notification_settings_edit_custom_settings_section_title" = "Custom setting per chat";
 "screen_notification_settings_edit_failed_updating_default_mode" = "An error occurred while updating the notification setting.";
 "screen_notification_settings_edit_mode_all_messages" = "All messages";
-"screen_notification_settings_edit_mode_mentions_and_keywords" = "Mentions and Keywords only";
+"screen_notification_settings_edit_mode_mentions_and_keywords" = "Mentions and replies only";
 "screen_notification_settings_edit_screen_direct_section_header" = "On direct chats, notify me for";
 "screen_notification_settings_edit_screen_group_section_header" = "On group chats, notify me for";
 "screen_notification_settings_enable_notifications" = "Enable notifications on this device";
@@ -1336,7 +1341,7 @@
 "screen_room_notification_settings_error_setting_mode" = "Failed setting the mode, please try again.";
 "screen_room_notification_settings_mentions_only_disclaimer" = "Your homeserver does not support this option in encrypted rooms, you won't get notified in this room.";
 "screen_room_notification_settings_mode_all_messages" = "All messages";
-"screen_room_notification_settings_mode_mentions_and_keywords" = "Mentions and Keywords only";
+"screen_room_notification_settings_mode_mentions_and_keywords" = "Mentions and replies only";
 "screen_room_notification_settings_room_custom_settings_title" = "In this room, notify me for";
 "screen_room_pinned_banner_indicator" = "%1$@ of %2$@";
 "screen_room_pinned_banner_indicator_description" = "%1$@ Pinned messages";

ElementX/Resources/Localizations/en.lproj/Localizable.stringsdict

@@ -43,9 +43,9 @@
 			<key>NSStringFormatValueTypeKey</key>
 			<string>d</string>
 			<key>one</key>
-			<string>Read by %1$@ and %2$d other</string>
+			<string>Previous message read by %1$@ and %2$d other</string>
 			<key>other</key>
-			<string>Read by %1$@ and %2$d others</string>
+			<string>Previous message read by %1$@ and %2$d others</string>
 		</dict>
 		<key>NSStringLocalizedFormatKey</key>
 		<string>%#@COUNT@</string>

ElementX/Resources/Localizations/en.lproj/Untranslated.strings

@@ -1,9 +1,9 @@
 "screen_home_tab_search" = "Search";
 "screen_search_empty_state_message" = "Search for chats and messages";
-"screen_search_tab_messages" = "Messages";
-"screen_search_tab_rooms" = "Rooms";
 "screen_search_empty_state_title" = "Start searching...";
 "screen_search_no_results_message" = "There are no results for “%1$@.” Try a new search term.";
+"screen_search_tab_messages" = "Messages";
+"screen_search_tab_rooms" = "Rooms";
 "soft_logout_clear_data_dialog_content" = "Clear all data currently stored on this device?\nSign in again to access your account data and messages.";
 "soft_logout_clear_data_dialog_title" = "Clear data";
 "soft_logout_clear_data_notice" = "Warning: Your personal data (including encryption keys) is still stored on this device.\n\nClear it if you’re finished using this device, or want to sign in to another account.";

ElementX/Sources/Generated/Strings.swift

@@ -20,6 +20,8 @@ internal nonisolated enum L10n {
   internal static var a11yAddress: String { return L10n.tr("Localizable", "a11y_address") }
   /// Avatar
   internal static var a11yAvatar: String { return L10n.tr("Localizable", "a11y_avatar") }
+  /// Clear search field
+  internal static var a11yClearSearchField: String { return L10n.tr("Localizable", "a11y_clear_search_field") }
   /// Minimise message text field
   internal static var a11yCollapseMessageTextField: String { return L10n.tr("Localizable", "a11y_collapse_message_text_field") }
   /// Decrease votes allowed per person
@@ -108,7 +110,7 @@ internal nonisolated enum L10n {
   }
   /// React with other emojis
   internal static var a11yReactWithOtherEmojis: String { return L10n.tr("Localizable", "a11y_react_with_other_emojis") }
-  /// Read by %1$@ and %2$@
+  /// Previous message read by %1$@ and %2$@
   internal static func a11yReadReceiptsMultiple(_ p1: Any, _ p2: Any) -> String {
     return L10n.tr("Localizable", "a11y_read_receipts_multiple", String(describing: p1), String(describing: p2))
   }
@@ -116,12 +118,12 @@ internal nonisolated enum L10n {
   internal static func a11yReadReceiptsMultipleWithOthers(_ p1: Int) -> String {
     return L10n.tr("Localizable", "a11y_read_receipts_multiple_with_others", p1)
   }
-  /// Read by %1$@
+  /// Previous message read by %1$@
   internal static func a11yReadReceiptsSingle(_ p1: Any) -> String {
     return L10n.tr("Localizable", "a11y_read_receipts_single", String(describing: p1))
   }
   /// Tap to show all
-  internal static var a11yReadReceiptsTapToShowAll: String { return L10n.tr("Localizable", "a11y_read_receipts_tap_to_show_all") }
+  internal static var a11yReadReceiptsTapToShowAllIos: String { return L10n.tr("Localizable", "a11y_read_receipts_tap_to_show_all_ios") }
   /// Remove reaction: %1$@
   internal static func a11yRemoveReaction(_ p1: Any) -> String {
     return L10n.tr("Localizable", "a11y_remove_reaction", String(describing: p1))
@@ -900,6 +902,14 @@ internal nonisolated enum L10n {
   internal static var confirmRecoveryKeyBannerSecondaryButtonTitle: String { return L10n.tr("Localizable", "confirm_recovery_key_banner_secondary_button_title") }
   /// Your key storage is out of sync
   internal static var confirmRecoveryKeyBannerTitle: String { return L10n.tr("Localizable", "confirm_recovery_key_banner_title") }
+  /// Download not available.
+  internal static var contentScannerNotFound: String { return L10n.tr("Localizable", "content_scanner_not_found") }
+  /// File not found
+  internal static var contentScannerNotFoundTitle: String { return L10n.tr("Localizable", "content_scanner_not_found_title") }
+  /// Preview and download have been disabled.
+  internal static var contentScannerUnsafeMessage: String { return L10n.tr("Localizable", "content_scanner_unsafe_message") }
+  /// The file is not safe
+  internal static var contentScannerUnsafeTitle: String { return L10n.tr("Localizable", "content_scanner_unsafe_title") }
   /// %1$@ crashed the last time it was used. Would you like to share a crash report with us?
   internal static func crashDetectionDialogContent(_ p1: Any) -> String {
     return L10n.tr("Localizable", "crash_detection_dialog_content", String(describing: p1))
@@ -2396,7 +2406,7 @@ internal nonisolated enum L10n {
   internal static var screenNotificationSettingsEditFailedUpdatingDefaultMode: String { return L10n.tr("Localizable", "screen_notification_settings_edit_failed_updating_default_mode") }
   /// All messages
   internal static var screenNotificationSettingsEditModeAllMessages: String { return L10n.tr("Localizable", "screen_notification_settings_edit_mode_all_messages") }
-  /// Mentions and Keywords only
+  /// Mentions and replies only
   internal static var screenNotificationSettingsEditModeMentionsAndKeywords: String { return L10n.tr("Localizable", "screen_notification_settings_edit_mode_mentions_and_keywords") }
   /// On direct chats, notify me for
   internal static var screenNotificationSettingsEditScreenDirectSectionHeader: String { return L10n.tr("Localizable", "screen_notification_settings_edit_screen_direct_section_header") }
@@ -3080,7 +3090,7 @@ internal nonisolated enum L10n {
   internal static var screenRoomNotificationSettingsMentionsOnlyDisclaimer: String { return L10n.tr("Localizable", "screen_room_notification_settings_mentions_only_disclaimer") }
   /// All messages
   internal static var screenRoomNotificationSettingsModeAllMessages: String { return L10n.tr("Localizable", "screen_room_notification_settings_mode_all_messages") }
-  /// Mentions and Keywords only
+  /// Mentions and replies only
   internal static var screenRoomNotificationSettingsModeMentionsAndKeywords: String { return L10n.tr("Localizable", "screen_room_notification_settings_mode_mentions_and_keywords") }
   /// In this room, notify me for
   internal static var screenRoomNotificationSettingsRoomCustomSettingsTitle: String { return L10n.tr("Localizable", "screen_room_notification_settings_room_custom_settings_title") }

ElementX/Sources/Mocks/ContentScannerServiceMock.swift

@@ -0,0 +1,29 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+struct ContentScannerServiceMockConfiguration {
+    /// The verdict reported for every source: `true` when safe, `false` when unsafe, or `nil` to
+    /// never resolve the scan so that the scanning state remains visible.
+    var scanResult: Bool?
+}
+
+extension ContentScannerServiceMock {
+    convenience init(_ configuration: ContentScannerServiceMockConfiguration) {
+        self.init()
+        
+        scanResultFromSourceReturnValue = configuration.scanResult
+        loadScanResultFromSourceClosure = { _ in
+            guard let scanResult = configuration.scanResult else {
+                try? await Task.sleep(for: .seconds(3600))
+                return .failure(.failedScanning)
+            }
+            return .success(scanResult)
+        }
+    }
+}

ElementX/Sources/Mocks/UserSessionMock.swift

@@ -11,6 +11,7 @@ import Foundation
 
 struct UserSessionMockConfiguration {
     var clientProxy: ClientProxyProtocol = ClientProxyMock(.init())
+    var contentScannerService: ContentScannerServiceProtocol?
 }
 
 @MainActor extension UserSessionMock {
@@ -20,6 +21,7 @@ struct UserSessionMockConfiguration {
         clientProxy = configuration.clientProxy
         mediaProvider = MediaProviderMock(.init())
         voiceMessageMediaManager = VoiceMessageMediaManagerMock()
+        contentScannerService = configuration.contentScannerService
         
         sessionSecurityStatePublisher = CurrentValueSubject<SessionSecurityState, Never>(.init(verificationState: .verified, recoveryState: .enabled)).asCurrentValuePublisher()
         

ElementX/Sources/Other/SwiftUI/Views/ContentScanningView.swift

@@ -0,0 +1,130 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import SwiftUI
+
+/// The reason a media item can't be presented.
+nonisolated enum ContentScanningFailure {
+    /// The content scanner flagged the media as unsafe.
+    case notSafe
+    /// The media couldn't be scanned, e.g. it wasn't found or a network error occurred.
+    case notFound
+}
+
+/// Reports a ``ContentScanningFailure`` up the view hierarchy so that ancestors (such as the
+/// message bubble) can adopt the critical styling without having to track the scan state themselves.
+nonisolated struct ContentScanningFailurePreferenceKey: PreferenceKey {
+    static let defaultValue: ContentScanningFailure? = nil
+    
+    static func reduce(value: inout ContentScanningFailure?, nextValue: () -> ContentScanningFailure?) {
+        value = value ?? nextValue()
+    }
+}
+
+/// A wrapper that gates the presentation of a media item on its content scan state.
+///
+/// The safe content is rendered when the media is known to be safe or when there's no content
+/// scanner configured, the scanning content whilst a scan is in flight and the unsafe content
+/// when the media is unsafe or couldn't be scanned. Any failure is also reported up the view
+/// hierarchy through ``ContentScanningFailurePreferenceKey``.
+///
+/// - Important: Any interactions with the media (taps, playback etc.) must live inside the safe
+/// content so that they're unavailable whilst the media is being scanned or is unsafe.
+struct ContentScanningView<SafeContent: View, ScanningContent: View, UnsafeContent: View>: View {
+    private enum ScanState {
+        case safe
+        case scanning
+        case unsafe(ContentScanningFailure)
+    }
+    
+    private let contentScannerService: ContentScannerServiceProtocol?
+    private let mediaSource: MediaSourceProxy?
+    private let safeContent: () -> SafeContent
+    private let scanningContent: () -> ScanningContent
+    private let unsafeContent: (ContentScanningFailure) -> UnsafeContent
+    
+    @State private var scanState: ScanState?
+    
+    /// - Parameters:
+    ///   - contentScannerService: The service used to scan the media. Passing `nil` disables
+    ///     scanning and the content is always rendered.
+    ///   - mediaSource: The media source to scan. Passing `nil` renders the content, this
+    ///     makes it convenient to wrap items whose media source is optional.
+    ///   - safeContent: The regular presentation of the media, including any interactions with it.
+    ///   - scanningContent: The presentation of the media whilst it's being scanned.
+    ///   - unsafeContent: The presentation of the media when it can't be shown.
+    init(contentScannerService: ContentScannerServiceProtocol?,
+         mediaSource: MediaSourceProxy?,
+         @ViewBuilder safeContent: @escaping () -> SafeContent,
+         @ViewBuilder scanningContent: @escaping () -> ScanningContent,
+         @ViewBuilder unsafeContent: @escaping (ContentScanningFailure) -> UnsafeContent) {
+        self.contentScannerService = contentScannerService
+        self.mediaSource = mediaSource
+        self.safeContent = safeContent
+        self.scanningContent = scanningContent
+        self.unsafeContent = unsafeContent
+    }
+    
+    var body: some View {
+        content
+            .preference(key: ContentScanningFailurePreferenceKey.self, value: scanFailure)
+            .task(id: mediaSource?.url.absoluteString) {
+                await scan()
+            }
+    }
+    
+    @ViewBuilder
+    private var content: some View {
+        switch resolvedScanState {
+        case .safe:
+            safeContent()
+        case .scanning:
+            scanningContent()
+        case .unsafe(let failure):
+            unsafeContent(failure)
+        }
+    }
+    
+    private var scanFailure: ContentScanningFailure? {
+        guard case .unsafe(let failure) = resolvedScanState else {
+            return nil
+        }
+        return failure
+    }
+    
+    private var resolvedScanState: ScanState {
+        guard let contentScannerService, let mediaSource else {
+            return .safe
+        }
+        
+        if let scanState {
+            return scanState
+        }
+        
+        // Until the scan triggered by this view resolves, reflect any verdict already in the cache.
+        switch contentScannerService.scanResultFromSource(mediaSource) {
+        case true: return .safe
+        case false: return .unsafe(.notSafe)
+        default: return .scanning
+        }
+    }
+    
+    private func scan() async {
+        guard let contentScannerService, let mediaSource else {
+            return
+        }
+        
+        switch await contentScannerService.loadScanResultFromSource(mediaSource) {
+        case .success(true):
+            scanState = .safe
+        case .success(false):
+            scanState = .unsafe(.notSafe)
+        case .failure:
+            scanState = .unsafe(.notFound)
+        }
+    }
+}

ElementX/Sources/Other/TestablePreview/TestablePreviewsDictionary.swift

@@ -33,6 +33,7 @@ enum TestablePreviewsDictionary {
             "CollapsibleRoomTimelineView_Previews" : CollapsibleRoomTimelineView_Previews.self,
             "CompletionSuggestion_Previews" : CompletionSuggestion_Previews.self,
             "ComposerToolbar_Previews" : ComposerToolbar_Previews.self,
+            "ContentScanningFailureView_Previews" : ContentScanningFailureView_Previews.self,
             "CopyTextButton_Previews" : CopyTextButton_Previews.self,
             "CreateRoomSpaceSelectionSheet_Previews" : CreateRoomSpaceSelectionSheet_Previews.self,
             "CreateRoom_Previews" : CreateRoom_Previews.self,

ElementX/Sources/Screens/Timeline/TimelineViewModel.swift

@@ -1116,7 +1116,10 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
 extension TimelineViewModel {
     static let mock = mock(timelineKind: .live)
     
-    static func mock(timelineKind: TimelineKind = .live, timelineController: TimelineControllerMock? = nil, hasPredecessor: Bool = false) -> TimelineViewModel {
+    static func mock(timelineKind: TimelineKind = .live,
+                     timelineController: TimelineControllerMock? = nil,
+                     hasPredecessor: Bool = false,
+                     contentScannerService: ContentScannerServiceProtocol? = nil) -> TimelineViewModel {
         let clientProxyMock = ClientProxyMock(.init())
         clientProxyMock.roomSummaryForAliasReturnValue = .mock(id: "!room:matrix.org", name: "Room")
         clientProxyMock.roomSummaryForIdentifierReturnValue = .mock(id: "!room:matrix.org", name: "Room", canonicalAlias: "#room:matrix.org")
@@ -1127,7 +1130,7 @@ extension TimelineViewModel {
         return TimelineViewModel(roomProxy: roomProxy,
                                  focussedEventID: nil,
                                  timelineController: timelineController ?? TimelineControllerMock(.init(timelineKind: timelineKind)),
-                                 userSession: UserSessionMock(.init(clientProxy: clientProxyMock)),
+                                 userSession: UserSessionMock(.init(clientProxy: clientProxyMock, contentScannerService: contentScannerService)),
                                  mediaPlayerProvider: MediaPlayerProviderMock(),
                                  userIndicatorController: UserIndicatorControllerMock(),
                                  appMediator: AppMediatorMock(.init()),

ElementX/Sources/Screens/Timeline/View/Style/TimelineItemBubbleBackground.swift

@@ -14,12 +14,15 @@ extension View {
     ///   - isOutgoing: rounds the corners according to the side it shows on, defaults to true
     ///   - insets: defaults to what we use for file timeline items, text uses custom values
     ///   - color: self explanatory, defaults to subtle secondary
+    ///   - borderColor: an optional colour for a border around the bubble
     func bubbleBackground(isOutgoing: Bool = true,
                           insets: EdgeInsets = .init(top: 8, leading: 12, bottom: 8, trailing: 12),
-                          color: @autoclosure @MainActor () -> Color? = .compound.bgSubtleSecondary) -> some View {
+                          color: @autoclosure @MainActor () -> Color? = .compound.bgSubtleSecondary,
+                          borderColor: @autoclosure @MainActor () -> Color? = nil) -> some View {
         modifier(TimelineItemBubbleBackgroundModifier(isOutgoing: isOutgoing,
                                                       insets: insets,
-                                                      color: color()))
+                                                      color: color(),
+                                                      borderColor: borderColor()))
     }
 }
 
@@ -29,12 +32,19 @@ private struct TimelineItemBubbleBackgroundModifier: ViewModifier {
     let isOutgoing: Bool
     let insets: EdgeInsets
     var color: Color?
+    var borderColor: Color?
     
     func body(content: Content) -> some View {
         content
             .padding(insets)
             .background(color)
             .cornerRadius(12, corners: roundedCorners)
+            .overlay {
+                if let borderColor {
+                    RoundedCornerShape(radius: 12, corners: roundedCorners)
+                        .stroke(borderColor)
+                }
+            }
     }
     
     private var roundedCorners: UIRectCorner {

ElementX/Sources/Screens/Timeline/View/Style/TimelineItemBubbledStylerView.swift

@@ -18,6 +18,14 @@ struct TimelineItemBubbledStylerView<Content: View>: View {
     let adjustedDeliveryStatus: TimelineItemDeliveryStatus?
     @ViewBuilder let content: () -> Content
     
+    /// Whether the item's media failed content scanning, in which case the whole bubble adopts
+    /// the critical styling. Reported by the item's `ContentScanningView` through the preference key.
+    @State private var contentScanningFailure: ContentScanningFailure?
+    
+    private var hasContentScanningFailure: Bool {
+        contentScanningFailure != nil
+    }
+    
     private var isDM: Bool {
         context.viewState.isDM
     }
@@ -78,6 +86,7 @@ struct TimelineItemBubbledStylerView<Content: View>: View {
         }
         .padding(EdgeInsets(top: 1, leading: 8, bottom: 1, trailing: 8))
         .highlightedTimelineItem(isFocussed)
+        .onPreferenceChange(ContentScanningFailurePreferenceKey.self) { contentScanningFailure = $0 }
     }
     
     @ViewBuilder
@@ -179,10 +188,14 @@ struct TimelineItemBubbledStylerView<Content: View>: View {
     
     var messageBubble: some View {
         contentWithReply
-            .timelineItemSendInfo(timelineItem: timelineItem, adjustedDeliveryStatus: adjustedDeliveryStatus, context: context)
+            .timelineItemSendInfo(timelineItem: timelineItem,
+                                  adjustedDeliveryStatus: adjustedDeliveryStatus,
+                                  hasContentScanningFailure: hasContentScanningFailure,
+                                  context: context)
             .bubbleBackground(isOutgoing: timelineItem.isOutgoing,
-                              insets: timelineItem.bubbleInsets,
+                              insets: timelineItem.bubbleInsets(hasContentScanningFailure: hasContentScanningFailure),
-                              color: timelineItem.bubbleBackgroundColor)
+                              color: hasContentScanningFailure ? .compound.bgCriticalSubtle : timelineItem.bubbleBackgroundColor,
+                              borderColor: hasContentScanningFailure ? .compound.borderCriticalSubtle : nil)
     }
     
     var contentWithReply: some View {
@@ -248,9 +261,14 @@ private extension EventBasedTimelineItemProtocol {
     
     /// The insets for the full bubble content.
     /// Padding affecting just the "send info" should be added inside `TimelineItemSendInfoView`
-    var bubbleInsets: EdgeInsets {
+    func bubbleInsets(hasContentScanningFailure: Bool) -> EdgeInsets {
         let defaultInsets: EdgeInsets = .init(around: 8)
         
+        // The content scanner failure placeholder is always rendered inset within the critical bubble.
+        if hasContentScanningFailure {
+            return defaultInsets
+        }
+        
         switch self {
         case is StickerRoomTimelineItem:
             return .zero
@@ -370,6 +388,8 @@ struct TimelineItemBubbledStylerView_Previews: PreviewProvider, TestablePreview
                                  timelineControllerFactory: TimelineControllerFactoryMock(.init()))
     }()
     
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
+    
     static var previews: some View {
         mockTimeline
             .previewDisplayName("Mock Timeline")
@@ -439,6 +459,26 @@ struct TimelineItemBubbledStylerView_Previews: PreviewProvider, TestablePreview
                                                                              content: .init(body: "Short message"),
                                                                              properties: properties),
                                                   groupStyle: .single))
+            
+            RoomTimelineItemView(viewState: .init(item: FileRoomTimelineItem(id: .randomEvent,
+                                                                             timestamp: .mock,
+                                                                             isOutgoing: true,
+                                                                             isEditable: false,
+                                                                             canBeRepliedTo: true,
+                                                                             sender: .init(id: "whoever"),
+                                                                             content: .init(filename: "unsafe.pdf",
+                                                                                            caption: "Replying with an unsafe file.",
+                                                                                            formattedCaption: nil,
+                                                                                            source: try? MediaSourceProxy(url: .mockMXCFile, mimeType: nil),
+                                                                                            fileSize: 3 * 1024 * 1024,
+                                                                                            thumbnailSource: nil,
+                                                                                            contentType: nil),
+                                                                             properties: .init(replyDetails: .loaded(sender: .init(id: "", displayName: "Alice"),
+                                                                                                                     eventID: "123",
+                                                                                                                     eventContent: .message(.text(.init(body: "Short")))))),
+                                                  groupStyle: .single))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
         }
         .environmentObject(viewModel.context)
         .environment(\.timelineContext, viewModel.context)

ElementX/Sources/Screens/Timeline/View/Style/TimelineItemSendInfoLabel.swift

@@ -13,9 +13,11 @@ extension View {
     /// Adds the send info (timestamp along indicators for edits and delivery/encryption issues) for the given timeline item to this view.
     func timelineItemSendInfo(timelineItem: EventBasedTimelineItemProtocol,
                               adjustedDeliveryStatus: TimelineItemDeliveryStatus?,
+                              hasContentScanningFailure: Bool = false,
                               context: TimelineViewModel.Context) -> some View {
         modifier(TimelineItemSendInfoModifier(sendInfo: .init(timelineItem: timelineItem,
-                                                              adjustedDeliveryStatus: adjustedDeliveryStatus),
+                                                              adjustedDeliveryStatus: adjustedDeliveryStatus,
+                                                              hasContentScanningFailure: hasContentScanningFailure),
                                               context: context))
     }
 }
@@ -148,7 +150,9 @@ private struct TimelineItemSendInfo {
 }
 
 private extension TimelineItemSendInfo {
-    init(timelineItem: EventBasedTimelineItemProtocol, adjustedDeliveryStatus: TimelineItemDeliveryStatus?) {
+    init(timelineItem: EventBasedTimelineItemProtocol,
+         adjustedDeliveryStatus: TimelineItemDeliveryStatus?,
+         hasContentScanningFailure: Bool = false) {
         itemID = timelineItem.id
         localizedString = timelineItem.localizedSendInfo
         
@@ -162,29 +166,35 @@ private extension TimelineItemSendInfo {
             nil
         }
         
-        layoutType = switch timelineItem {
+        layoutType = if hasContentScanningFailure {
-        case is TextBasedRoomTimelineItem:
+            // The content scanner failure placeholder replaces the media,
-            .overlay(capsuleStyle: false)
+            // so the send info is laid out like it is for a text message.
-        case let liveLocationTimelineItem as LiveLocationRoomTimelineItem:
+            timelineItem.hasMediaCaption ? .overlay(capsuleStyle: false) : .horizontal()
-            liveLocationTimelineItem.layout
+        } else {
-        case let message as EventBasedMessageTimelineItemProtocol:
+            switch timelineItem {
-            switch message {
+            case is TextBasedRoomTimelineItem:
-            case is ImageRoomTimelineItem, is VideoRoomTimelineItem:
+                .overlay(capsuleStyle: false)
-                .overlay(capsuleStyle: !message.hasMediaCaption)
+            case let liveLocationTimelineItem as LiveLocationRoomTimelineItem:
-            case is AudioRoomTimelineItem, is FileRoomTimelineItem:
+                liveLocationTimelineItem.layout
-                // swiftlint:disable:next void_function_in_ternary
+            case let message as EventBasedMessageTimelineItemProtocol:
-                message.hasMediaCaption ? .overlay(capsuleStyle: false) : .horizontal(spacing: 0) // No spacing as the content already contains it.
+                switch message {
-            case let locationTimelineItem as LocationRoomTimelineItem:
+                case is ImageRoomTimelineItem, is VideoRoomTimelineItem:
-                .overlay(capsuleStyle: locationTimelineItem.content.geoURI != nil)
+                    .overlay(capsuleStyle: !message.hasMediaCaption)
+                case is AudioRoomTimelineItem, is FileRoomTimelineItem:
+                    // swiftlint:disable:next void_function_in_ternary
+                    message.hasMediaCaption ? .overlay(capsuleStyle: false) : .horizontal(spacing: 0) // No spacing as the content already contains it.
+                case let locationTimelineItem as LocationRoomTimelineItem:
+                    .overlay(capsuleStyle: locationTimelineItem.content.geoURI != nil)
+                default:
+                    .horizontal()
+                }
+            case is StickerRoomTimelineItem:
+                .overlay(capsuleStyle: true)
+            case is PollRoomTimelineItem:
+                .vertical(spacing: 16)
             default:
                 .horizontal()
             }
-        case is StickerRoomTimelineItem:
-            .overlay(capsuleStyle: true)
-        case is PollRoomTimelineItem:
-            .vertical(spacing: 16)
-        default:
-            .horizontal()
         }
     }
 }

ElementX/Sources/Screens/Timeline/View/Supplementary/TimelineReadReceiptsView.swift

@@ -39,7 +39,7 @@ struct TimelineReadReceiptsView: View {
         }
         .accessibilityElement(children: .ignore)
         .accessibilityLabel(accessibilityLabel)
-        .accessibilityHint(L10n.a11yReadReceiptsTapToShowAll)
+        .accessibilityHint(L10n.a11yReadReceiptsTapToShowAllIos)
     }
     
     private var remaining: Int {

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/AudioRoomTimelineView.swift

@@ -21,7 +21,9 @@ struct AudioRoomTimelineView: View {
                                          formattedCaption: timelineItem.content.formattedCaption,
                                          trailingReservedSize: timelineItem.trailingReservedSize,
                                          shouldBoost: timelineItem.shouldBoost,
-                                         isAudioFile: true) {
+                                         isAudioFile: true,
+                                         contentScannerService: context?.contentScannerService,
+                                         mediaSource: timelineItem.content.source) {
                 context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
             }
             .accessibilityLabel(L10n.commonAudio)
@@ -31,6 +33,8 @@ struct AudioRoomTimelineView: View {
 
 struct AudioRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     
     static var previews: some View {
         VStack(spacing: 20) {
@@ -42,6 +46,22 @@ struct AudioRoomTimelineView_Previews: PreviewProvider, TestablePreview {
                                                          caption: "This song rocks!"))
         }
         .environmentObject(viewModel.context)
+        
+        VStack(spacing: 20) {
+            AudioRoomTimelineView(timelineItem: makeItem(filename: "scanning.ogg",
+                                                         fileSize: 2 * 1024 * 1024,
+                                                         caption: "The audio is being scanned."))
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            
+            AudioRoomTimelineView(timelineItem: makeItem(filename: "unsafe.ogg",
+                                                         fileSize: 2 * 1024 * 1024,
+                                                         caption: "The audio is not safe."))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .environmentObject(viewModel.context)
+        .previewDisplayName("Content Scanner")
     }
     
     static func makeItem(filename: String, fileSize: UInt, caption: String? = nil) -> AudioRoomTimelineItem {
@@ -55,7 +75,7 @@ struct AudioRoomTimelineView_Previews: PreviewProvider, TestablePreview {
                              caption: caption,
                              duration: 300,
                              waveform: nil,
-                             source: nil,
+                             source: try? MediaSourceProxy(url: .mockMXCAudio, mimeType: nil),
                              fileSize: fileSize,
                              contentType: nil))
     }

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/ContentScanningFailureView.swift

@@ -0,0 +1,64 @@
+//
+// Copyright 2026 Element Creations Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Compound
+import SwiftUI
+
+/// The placeholder shown in place of a media item when the content scanner wasn't able to
+/// validate it. Preview and download of the content are disabled.
+///
+/// This view only renders the failure title and message - the critical background is applied
+/// to the whole message bubble by `TimelineItemBubbledStylerView`, so that any caption and
+/// reply preview are included in the critical area too.
+struct ContentScanningFailureView: View {
+    let failure: ContentScanningFailure
+    
+    var body: some View {
+        HStack(spacing: 8) {
+            CompoundIcon(\.error, size: .medium, relativeTo: .compound.bodyMDSemibold)
+                .foregroundStyle(.compound.iconCriticalPrimary)
+            
+            VStack(alignment: .leading, spacing: 2) {
+                Text(title)
+                    .font(.compound.bodyMDSemibold)
+                    .foregroundStyle(.compound.textCriticalPrimary)
+                
+                Text(message)
+                    .font(.compound.bodySM)
+                    .foregroundStyle(.compound.textSecondary)
+            }
+        }
+        .accessibilityElement(children: .combine)
+    }
+    
+    private var title: String {
+        switch failure {
+        case .notSafe: L10n.contentScannerUnsafeTitle
+        case .notFound: L10n.contentScannerNotFoundTitle
+        }
+    }
+    
+    private var message: String {
+        switch failure {
+        case .notSafe: L10n.contentScannerUnsafeMessage
+        case .notFound: L10n.contentScannerNotFound
+        }
+    }
+}
+
+// MARK: - Previews
+
+struct ContentScanningFailureView_Previews: PreviewProvider, TestablePreview {
+    static var previews: some View {
+        VStack(spacing: 16) {
+            ContentScanningFailureView(failure: .notSafe)
+            ContentScanningFailureView(failure: .notFound)
+        }
+        .frame(width: 260)
+        .padding()
+    }
+}

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/FileRoomTimelineView.swift

@@ -20,7 +20,9 @@ struct FileRoomTimelineView: View {
                                          caption: timelineItem.content.caption,
                                          formattedCaption: timelineItem.content.formattedCaption,
                                          trailingReservedSize: timelineItem.trailingReservedSize,
-                                         shouldBoost: timelineItem.shouldBoost) {
+                                         shouldBoost: timelineItem.shouldBoost,
+                                         contentScannerService: context?.contentScannerService,
+                                         mediaSource: timelineItem.content.source) {
                 context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
             }
             .accessibilityLabel(L10n.commonFile)
@@ -38,6 +40,8 @@ struct MediaFileRoomTimelineContent: View {
     var trailingReservedSize: CGSize = .zero
     var shouldBoost = false
     var isAudioFile = false
+    var contentScannerService: ContentScannerServiceProtocol?
+    var mediaSource: MediaSourceProxy?
     
     private var fileDescription: String {
         var fileDescription = "\(filename.validatedFileExtension.uppercased())"
@@ -55,13 +59,18 @@ struct MediaFileRoomTimelineContent: View {
     
     var body: some View {
         VStack(alignment: .leading, spacing: 8) {
-            if let onMediaTap {
+            ContentScanningView(contentScannerService: contentScannerService,
-                filePreview
+                                mediaSource: mediaSource) {
-                    .onTapGesture {
+                if let onMediaTap {
-                        onMediaTap()
+                    filePreview(isScanning: false)
-                    }
+                        .onTapGesture(perform: onMediaTap)
-            } else {
+                } else {
-                filePreview
+                    filePreview(isScanning: false)
+                }
+            } scanningContent: {
+                filePreview(isScanning: true)
+            } unsafeContent: { failure in
+                ContentScanningFailureView(failure: failure)
             }
             
             if let formattedCaption {
@@ -76,7 +85,7 @@ struct MediaFileRoomTimelineContent: View {
         }
     }
     
-    var filePreview: some View {
+    func filePreview(isScanning: Bool) -> some View {
         Label {
             VStack(alignment: .leading, spacing: 0) {
                 Text(filename)
@@ -90,11 +99,18 @@ struct MediaFileRoomTimelineContent: View {
             .foregroundStyle(.compound.textPrimary)
             .lineLimit(2)
         } icon: {
-            CompoundIcon(icon, size: .medium, relativeTo: .body)
+            Group {
-                .foregroundColor(.compound.iconPrimary)
+                if isScanning {
-                .scaledPadding(6)
+                    ProgressView()
-                .background(.compound.iconOnSolidPrimary,
+                        .scaledFrame(size: CompoundIcon.Size.medium.value, relativeTo: .body)
-                            in: RoundedRectangle(cornerRadius: 4, style: .continuous))
+                } else {
+                    CompoundIcon(icon, size: .medium, relativeTo: .body)
+                        .foregroundColor(.compound.iconPrimary)
+                }
+            }
+            .scaledPadding(6)
+            .background(.compound.iconOnSolidPrimary,
+                        in: RoundedRectangle(cornerRadius: 4, style: .continuous))
         }
         .labelStyle(.custom(spacing: 8, alignment: .center))
         .padding(.horizontal, 4) // Add to the styler's padding of 8, as we use the default insets for the caption.
@@ -105,6 +121,8 @@ struct MediaFileRoomTimelineContent: View {
 
 struct FileRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     
     static var previews: some View {
         VStack(spacing: 20.0) {
@@ -126,6 +144,21 @@ struct FileRoomTimelineView_Previews: PreviewProvider, TestablePreview {
                                                         formattedCaption: "Formatted caption"))
         }
         .environmentObject(viewModel.context)
+        
+        VStack(spacing: 20.0) {
+            FileRoomTimelineView(timelineItem: makeItem(filename: "scanning.pdf",
+                                                        fileSize: 3 * 1024 * 1024,
+                                                        caption: "The file is being scanned."))
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            
+            FileRoomTimelineView(timelineItem: makeItem(filename: "unsafe.pdf",
+                                                        fileSize: 3 * 1024 * 1024,
+                                                        caption: "The file is not safe."))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .previewDisplayName("Content Scanner")
     }
     
     static func makeItem(filename: String,
@@ -141,7 +174,7 @@ struct FileRoomTimelineView_Previews: PreviewProvider, TestablePreview {
               content: .init(filename: filename,
                              caption: caption,
                              formattedCaption: formattedCaption,
-                             source: nil,
+                             source: try? MediaSourceProxy(url: .mockMXCFile, mimeType: nil),
                              fileSize: fileSize,
                              thumbnailSource: nil,
                              contentType: nil))

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/ImageRoomTimelineView.swift

@@ -13,33 +13,51 @@ struct ImageRoomTimelineView: View {
     @Environment(\.timelineContext) private var context
     let timelineItem: ImageRoomTimelineItem
     
+    @State private var contentScanningFailure: ContentScanningFailure?
+    
     var hasMediaCaption: Bool {
         timelineItem.content.caption != nil
     }
     
     var body: some View {
         TimelineStyler(timelineItem: timelineItem) {
-            VStack(alignment: .leading, spacing: 4) {
+            // The caption sits 8pts below the content scanner failure placeholder, 4pts below the media.
-                loadableImage
+            VStack(alignment: .leading, spacing: contentScanningFailure == nil ? 4 : 8) {
-                    .accessibilityElement(children: .ignore)
+                ContentScanningView(contentScannerService: context?.contentScannerService,
-                    .accessibilityLabel(L10n.commonImage)
+                                    mediaSource: timelineItem.content.imageInfo.source) {
-                    // This clip shape is distinct from the one in the styler as that one
+                    loadableImage
-                    // operates on the entire message so wouldn't round the bottom corners.
+                        .accessibilityElement(children: .ignore)
-                    .clipShape(RoundedRectangle(cornerRadius: hasMediaCaption ? 6 : 0))
+                        .accessibilityLabel(L10n.commonImage)
-                    .onTapGesture {
+                        // This clip shape is distinct from the one in the styler as that one
-                        context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
+                        // operates on the entire message so wouldn't round the bottom corners.
-                    }
+                        .clipShape(RoundedRectangle(cornerRadius: hasMediaCaption ? 6 : 0))
-                
+                        .onTapGesture {
-                if let attributedCaption = timelineItem.content.formattedCaption {
+                            context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
-                    FormattedBodyText(attributedString: attributedCaption,
+                        }
-                                      trailingReservedSize: timelineItem.trailingReservedSize,
+                } scanningContent: {
-                                      boostFontSize: timelineItem.shouldBoost)
+                    placeholder
-                } else if let caption = timelineItem.content.caption {
+                        .overlay { ProgressView() }
-                    FormattedBodyText(text: caption,
+                        .timelineMediaFrame(imageInfo: timelineItem.content.thumbnailInfo ?? timelineItem.content.imageInfo)
-                                      trailingReservedSize: timelineItem.trailingReservedSize,
+                } unsafeContent: { failure in
-                                      boostFontSize: timelineItem.shouldBoost)
+                    ContentScanningFailureView(failure: failure)
                 }
+                
+                caption
             }
+            .onPreferenceChange(ContentScanningFailurePreferenceKey.self) { contentScanningFailure = $0 }
+        }
+    }
+    
+    @ViewBuilder
+    private var caption: some View {
+        if let attributedCaption = timelineItem.content.formattedCaption {
+            FormattedBodyText(attributedString: attributedCaption,
+                              trailingReservedSize: timelineItem.trailingReservedSize,
+                              boostFontSize: timelineItem.shouldBoost)
+        } else if let caption = timelineItem.content.caption {
+            FormattedBodyText(text: caption,
+                              trailingReservedSize: timelineItem.trailingReservedSize,
+                              boostFontSize: timelineItem.shouldBoost)
         }
     }
     
@@ -75,6 +93,8 @@ struct ImageRoomTimelineView: View {
 
 struct ImageRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     
     static var previews: some View {
         ScrollView {
@@ -93,6 +113,17 @@ struct ImageRoomTimelineView_Previews: PreviewProvider, TestablePreview {
         .environment(\.timelineContext, viewModel.context)
         .previewLayout(.fixed(width: 390, height: 1200))
         .padding(.bottom, 20)
+        
+        VStack(spacing: 20.0) {
+            ImageRoomTimelineView(timelineItem: makeTimelineItem())
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            ImageRoomTimelineView(timelineItem: makeTimelineItem(caption: "This is an unsafe image."))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .environmentObject(viewModel.context)
+        .previewDisplayName("Content Scanner")
     }
     
     private static func makeTimelineItem(caption: String? = nil, isEdited: Bool = false) -> ImageRoomTimelineItem {

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/StickerRoomTimelineView.swift

@@ -15,18 +15,27 @@ struct StickerRoomTimelineView: View {
     
     var body: some View {
         TimelineStyler(timelineItem: timelineItem) {
-            LoadableImage(mediaSource: timelineItem.imageInfo.source,
+            ContentScanningView(contentScannerService: context?.contentScannerService,
-                          mediaType: .timelineItem(uniqueID: timelineItem.id.uniqueID),
+                                mediaSource: timelineItem.imageInfo.source) {
-                          blurhash: timelineItem.blurhash,
+                LoadableImage(mediaSource: timelineItem.imageInfo.source,
-                          size: timelineItem.imageInfo.size,
+                              mediaType: .timelineItem(uniqueID: timelineItem.id.uniqueID),
-                          mediaProvider: context?.mediaProvider) {
+                              blurhash: timelineItem.blurhash,
+                              size: timelineItem.imageInfo.size,
+                              mediaProvider: context?.mediaProvider) {
+                    placeholder
+                }
+                .timelineMediaFrame(imageInfo: timelineItem.imageInfo)
+                .accessibilityElement(children: .ignore)
+                .accessibilityLabel("\(L10n.commonSticker), \(timelineItem.body)")
+                .onTapGesture {
+                    context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
+                }
+            } scanningContent: {
                 placeholder
-            }
+                    .overlay { ProgressView() }
-            .timelineMediaFrame(imageInfo: timelineItem.imageInfo)
+                    .timelineMediaFrame(imageInfo: timelineItem.imageInfo)
-            .accessibilityElement(children: .ignore)
+            } unsafeContent: { failure in
-            .accessibilityLabel("\(L10n.commonSticker), \(timelineItem.body)")
+                ContentScanningFailureView(failure: failure)
-            .onTapGesture {
-                context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
             }
         }
     }
@@ -40,29 +49,41 @@ struct StickerRoomTimelineView: View {
 
 struct StickerRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     
     static var previews: some View {
         VStack(spacing: 20.0) {
-            StickerRoomTimelineView(timelineItem: StickerRoomTimelineItem(id: .randomEvent,
+            StickerRoomTimelineView(timelineItem: makeTimelineItem(body: "Some image"))
-                                                                          body: "Some image",
-                                                                          timestamp: .mock,
-                                                                          isOutgoing: false,
-                                                                          isEditable: false,
-                                                                          canBeRepliedTo: true,
-                                                                          sender: .init(id: "Bob"),
-                                                                          imageInfo: .mockImage))
             
-            StickerRoomTimelineView(timelineItem: StickerRoomTimelineItem(id: .randomEvent,
+            StickerRoomTimelineView(timelineItem: makeTimelineItem(body: "Blurhashed image",
-                                                                          body: "Blurhashed image",
+                                                                   blurhash: "L%KUc%kqS$RP?Ks,WEf8OlrqaekW"))
-                                                                          timestamp: .mock,
-                                                                          isOutgoing: false,
-                                                                          isEditable: false,
-                                                                          canBeRepliedTo: true,
-                                                                          sender: .init(id: "Bob"),
-                                                                          imageInfo: .mockImage,
-                                                                          blurhash: "L%KUc%kqS$RP?Ks,WEf8OlrqaekW"))
         }
         .environmentObject(viewModel.context)
         .environment(\.timelineContext, viewModel.context)
+        
+        VStack(spacing: 20.0) {
+            StickerRoomTimelineView(timelineItem: makeTimelineItem(body: "Scanning image"))
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            
+            StickerRoomTimelineView(timelineItem: makeTimelineItem(body: "Unsafe image"))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .environmentObject(viewModel.context)
+        .previewDisplayName("Content Scanner")
+    }
+    
+    private static func makeTimelineItem(body: String, blurhash: String? = nil) -> StickerRoomTimelineItem {
+        StickerRoomTimelineItem(id: .randomEvent,
+                                body: body,
+                                timestamp: .mock,
+                                isOutgoing: false,
+                                isEditable: false,
+                                canBeRepliedTo: true,
+                                sender: .init(id: "Bob"),
+                                imageInfo: .mockImage,
+                                blurhash: blurhash)
     }
 }

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/VideoRoomTimelineView.swift

@@ -13,23 +13,35 @@ struct VideoRoomTimelineView: View {
     @Environment(\.timelineContext) private var context
     let timelineItem: VideoRoomTimelineItem
     
+    @State private var contentScanningFailure: ContentScanningFailure?
+    
     private var hasMediaCaption: Bool {
         timelineItem.content.caption != nil
     }
     
     var body: some View {
         TimelineStyler(timelineItem: timelineItem) {
-            VStack(alignment: .leading, spacing: 4) {
+            // The caption sits 8pts below the content scanner failure placeholder, 4pts below the media.
-                thumbnail
+            VStack(alignment: .leading, spacing: contentScanningFailure == nil ? 4 : 8) {
-                    .timelineMediaFrame(imageInfo: timelineItem.content.thumbnailInfo)
+                ContentScanningView(contentScannerService: context?.contentScannerService,
-                    .accessibilityElement(children: .ignore)
+                                    mediaSource: timelineItem.content.videoInfo.source) {
-                    .accessibilityLabel(L10n.commonVideo)
+                    thumbnail
-                    // This clip shape is distinct from the one in the styler as that one
+                        .timelineMediaFrame(imageInfo: timelineItem.content.thumbnailInfo)
-                    // operates on the entire message so wouldn't round the bottom corners.
+                        .accessibilityElement(children: .ignore)
-                    .clipShape(RoundedRectangle(cornerRadius: hasMediaCaption ? 6 : 0))
+                        .accessibilityLabel(L10n.commonVideo)
-                    .onTapGesture {
+                        // This clip shape is distinct from the one in the styler as that one
-                        context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
+                        // operates on the entire message so wouldn't round the bottom corners.
-                    }
+                        .clipShape(RoundedRectangle(cornerRadius: hasMediaCaption ? 6 : 0))
+                        .onTapGesture {
+                            context?.send(viewAction: .mediaTapped(itemID: timelineItem.id))
+                        }
+                } scanningContent: {
+                    placeholder
+                        .overlay { ProgressView() }
+                        .timelineMediaFrame(imageInfo: timelineItem.content.thumbnailInfo)
+                } unsafeContent: { failure in
+                    ContentScanningFailureView(failure: failure)
+                }
                 
                 if let attributedCaption = timelineItem.content.formattedCaption {
                     FormattedBodyText(attributedString: attributedCaption,
@@ -41,6 +53,7 @@ struct VideoRoomTimelineView: View {
                                       boostFontSize: timelineItem.shouldBoost)
                 }
             }
+            .onPreferenceChange(ContentScanningFailurePreferenceKey.self) { contentScanningFailure = $0 }
         }
     }
     
@@ -83,6 +96,8 @@ struct VideoRoomTimelineView: View {
 
 struct VideoRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     
     static var previews: some View {
         ScrollView {
@@ -101,6 +116,17 @@ struct VideoRoomTimelineView_Previews: PreviewProvider, TestablePreview {
         .environment(\.timelineContext, viewModel.context)
         .previewLayout(.fixed(width: 390, height: 975))
         .padding(.bottom, 20)
+        
+        VStack(spacing: 20.0) {
+            VideoRoomTimelineView(timelineItem: makeTimelineItem())
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            VideoRoomTimelineView(timelineItem: makeTimelineItem(caption: "This is an unsafe video."))
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .environmentObject(viewModel.context)
+        .previewDisplayName("Content Scanner")
     }
     
     private static func makeTimelineItem(caption: String? = nil, isEdited: Bool = false) -> VideoRoomTimelineItem {

ElementX/Sources/Screens/Timeline/View/TimelineItemViews/VoiceMessageRoomTimelineView.swift

@@ -30,12 +30,25 @@ struct VoiceMessageRoomTimelineContent: View {
     let playerState: AudioPlayerState
     
     var body: some View {
-        VoiceMessageRoomPlaybackView(playerState: playerState,
+        ContentScanningView(contentScannerService: context?.contentScannerService,
-                                     onPlayPause: onPlaybackPlayPause,
+                            mediaSource: timelineItem.content.source) {
-                                     onSeek: { onPlaybackSeek($0) },
+            VoiceMessageRoomPlaybackView(playerState: playerState,
-                                     onScrubbing: { onPlaybackScrubbing($0) },
+                                         onPlayPause: onPlaybackPlayPause,
-                                     onPlaybackSpeedChange: onPlaybackSpeedChange)
+                                         onSeek: { onPlaybackSeek($0) },
-            .fixedSize(horizontal: false, vertical: true)
+                                         onScrubbing: { onPlaybackScrubbing($0) },
+                                         onPlaybackSpeedChange: onPlaybackSpeedChange)
+                .fixedSize(horizontal: false, vertical: true)
+        } scanningContent: {
+            VoiceMessageRoomPlaybackView(playerState: playerState,
+                                         isScanning: true,
+                                         onPlayPause: { },
+                                         onSeek: { _ in },
+                                         onScrubbing: { _ in },
+                                         onPlaybackSpeedChange: { })
+                .fixedSize(horizontal: false, vertical: true)
+        } unsafeContent: { failure in
+            ContentScanningFailureView(failure: failure)
+        }
     }
     
     private func onPlaybackPlayPause() {
@@ -67,6 +80,8 @@ struct VoiceMessageRoomTimelineContent: View {
 
 struct VoiceMessageRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     static let viewModel = TimelineViewModel.mock
+    static let scanningViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: nil)))
+    static let unsafeViewModel = TimelineViewModel.mock(contentScannerService: ContentScannerServiceMock(.init(scanResult: false)))
     static let timelineItemIdentifier = TimelineItemIdentifier.randomEvent
     static let voiceRoomTimelineItem = VoiceMessageRoomTimelineItem(id: timelineItemIdentifier,
                                                                     timestamp: .mock,
@@ -77,7 +92,7 @@ struct VoiceMessageRoomTimelineView_Previews: PreviewProvider, TestablePreview {
                                                                     content: .init(filename: "audio.ogg",
                                                                                    duration: 300,
                                                                                    waveform: EstimatedWaveform.mockWaveform,
-                                                                                   source: nil,
+                                                                                   source: try? MediaSourceProxy(url: .mockMXCAudio, mimeType: nil),
                                                                                    fileSize: nil,
                                                                                    contentType: nil))
     
@@ -89,6 +104,19 @@ struct VoiceMessageRoomTimelineView_Previews: PreviewProvider, TestablePreview {
     
     static var previews: some View {
         body.environmentObject(viewModel.context)
+        
+        VStack(spacing: 20) {
+            VoiceMessageRoomTimelineView(timelineItem: voiceRoomTimelineItem, playerState: playerState)
+                .environmentObject(scanningViewModel.context)
+                .environment(\.timelineContext, scanningViewModel.context)
+            
+            VoiceMessageRoomTimelineView(timelineItem: voiceRoomTimelineItem, playerState: playerState)
+                .environmentObject(unsafeViewModel.context)
+                .environment(\.timelineContext, unsafeViewModel.context)
+        }
+        .fixedSize(horizontal: false, vertical: true)
+        .environmentObject(viewModel.context)
+        .previewDisplayName("Content Scanner")
     }
     
     static var body: some View {

ElementX/Sources/Screens/Timeline/View/VoiceMessageRoomPlaybackView.swift

@@ -16,6 +16,10 @@ struct VoiceMessageRoomPlaybackView: View {
     @ScaledMetric private var waveformLinePadding = 2.0
     @GestureState var isDragging = false
     
+    /// Whether the voice message is being scanned by the content scanner, in which case
+    /// the play button shows a spinner and playback isn't available (which prevents the audio file from being downloaded).
+    var isScanning = false
+    
     let onPlayPause: () -> Void
     let onSeek: (Double) -> Void
     let onScrubbing: (Bool) -> Void
@@ -23,7 +27,7 @@ struct VoiceMessageRoomPlaybackView: View {
     
     var body: some View {
         HStack(spacing: 8) {
-            VoiceMessageButton(state: .init(playerState.playerButtonPlaybackState),
+            VoiceMessageButton(state: isScanning ? .loading : .init(playerState.playerButtonPlaybackState),
                                size: .medium,
                                action: onPlayPause)
             VStack(spacing: 2) {

PreviewTests/Sources/GeneratedPreviewTests.swift

@@ -172,6 +172,13 @@ extension PreviewTests {
         }
     }
 
+    @Test
+    func contentScanningFailureView() async throws {
+        for (index, preview) in ContentScanningFailureView_Previews._allPreviews.enumerated() {
+            try await assertSnapshots(matching: preview, step: index)
+        }
+    }
+
     @Test
     func copyTextButton() async throws {
         for (index, preview) in CopyTextButton_Previews._allPreviews.enumerated() {

PreviewTests/Sources/__Snapshots__/PreviewTests/audioRoomTimelineView.Content-Scanner-iPad-en-GB.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:65daa24e31bd0cf9f8b729a4d725cf5cb798d58bd955e1e2fe18d367c6ac22f7
+size 111447

PreviewTests/Sources/__Snapshots__/PreviewTests/audioRoomTimelineView.Content-Scanner-iPad-pseudo.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5e505ab7d0a5fdc71a8e1bf07e3cba7b053a71dafdfe4ffade41ea6dcb7bb0e7
+size 119312

PreviewTests/Sources/__Snapshots__/PreviewTests/audioRoomTimelineView.Content-Scanner-iPhone-en-GB.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e97574e905757bab6d1c37b0b74a3f1dea65d8414f7f229842d6a37335185360
+size 67391

PreviewTests/Sources/__Snapshots__/PreviewTests/audioRoomTimelineView.Content-Scanner-iPhone-pseudo.png

@@ -0,0 +1,3 @@
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+oid sha256:39d3a1d25f637f602cefde236633ac8443a5dc4f5775c9deb0b4256e9e117d71
+size 77453

PreviewTests/Sources/__Snapshots__/PreviewTests/contentScanningFailureView.iPad-en-GB-0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7de83b005f4c5290c77e0b270c955f67670a4edf8184d191c091ae3d8b934534
+size 89345

PreviewTests/Sources/__Snapshots__/PreviewTests/contentScanningFailureView.iPad-pseudo-0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:00af60cc60b8e60dbe765cefd9d75f5548d4e7008053795cd647291a21fa0e24
+size 103800

PreviewTests/Sources/__Snapshots__/PreviewTests/contentScanningFailureView.iPhone-en-GB-0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5b6e06014fdfe62eb843da48f30d105e2b4588eb43a2f6be70a4408b4343c792
+size 46916

PreviewTests/Sources/__Snapshots__/PreviewTests/contentScanningFailureView.iPhone-pseudo-0.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:cfa2cf6ed783a1bfa57949c21305ba2f32d77c6dd9fd616721e11c9612030ef4
+size 59329

PreviewTests/Sources/__Snapshots__/PreviewTests/fileRoomTimelineView.Content-Scanner-iPad-en-GB.png

@@ -0,0 +1,3 @@
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+oid sha256:9cf7cea65331f4916582cc81f765efb2f065a3b0905b9c2a0737a2a97ee76fea
+size 110083

PreviewTests/Sources/__Snapshots__/PreviewTests/fileRoomTimelineView.Content-Scanner-iPad-pseudo.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:abcc9c5a4e9bcfad13f04f221bc52c6594583e41b190156f7daf0dc8dddfb6d9
+size 117971

PreviewTests/Sources/__Snapshots__/PreviewTests/fileRoomTimelineView.Content-Scanner-iPhone-en-GB.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:264fd91dbadbd8f8c42b43b9767e9c948e6ce7433accf15649299df5f6da7c7b
+size 65882

PreviewTests/Sources/__Snapshots__/PreviewTests/fileRoomTimelineView.Content-Scanner-iPhone-pseudo.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bb5597e4068057e68013e7c02490b455871ebc2ec2c5c67fd65d356c72d9eca3
+size 75424

PreviewTests/Sources/__Snapshots__/PreviewTests/imageRoomTimelineView.Content-Scanner-iPad-en-GB.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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+oid sha256:f7330ef6fcdf672e4880b84286eb369303de4590f2aa99a198193fb3bae1dd90
+size 56283

PreviewTests/Sources/__Snapshots__/PreviewTests/voiceMessageRoomTimelineView.Content-Scanner-iPhone-pseudo.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6b5038008c1a41a73b548990ec5e0bc8ba9147ae5f4a666242eb81fc965d841b
+size 64558

compound-ios/Sources/Compound/Icons/CompoundIcon.swift

@@ -27,7 +27,7 @@ public struct CompoundIcon: View {
         /// A custom icon size.
         case custom(CGFloat)
         
-        var value: CGFloat {
+        public var value: CGFloat {
             switch self {
             case .xSmall: return 16
             case .small: return 20