TF-4099 Mobile adding an attachment causes composer UI issues

android/app/src/main/AndroidManifest.xml

@@ -42,6 +42,7 @@
         <activity
             android:name=".MainActivity"
             android:exported="true"
+            android:largeHeap="true"
             android:launchMode="singleTask"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"

lib/features/composer/presentation/composer_controller.dart

@@ -10,7 +10,6 @@ import 'package:dio/dio.dart';
 import 'package:dropdown_button2/dropdown_button2.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:filesize/filesize.dart';
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:get/get.dart';
@@ -618,6 +617,9 @@ class ComposerController extends BaseController
 
   void onCreatedMobileEditorAction(BuildContext context, HtmlEditorApi editorApi, String? content) {
     richTextMobileTabletController?.htmlEditorApi = editorApi;
+    richTextMobileTabletController?.onInitWebViewLifecycleManager(
+      editorApi.webViewController,
+    );
     richTextMobileTabletController?.richTextController.onCreateHTMLEditor(
       editorApi,
       onEnterKeyDown: _onEnterKeyDown,
@@ -1181,14 +1183,18 @@ class ComposerController extends BaseController
       .build();
   }
 
-  void openFilePickerByType(BuildContext context, FileType fileType) async {
-    if (!kIsWeb) {
+  void openFilePickerByType(BuildContext context, FileType fileType) {
+    if (PlatformInfo.isMobile) {
       popBack();
+      richTextMobileTabletController?.webViewLifecycleManager?.pause();
     }
     consumeState(_localFilePickerInteractor.execute(fileType: fileType));
   }
 
   void _handlePickFileFailure(LocalFilePickerFailure failure) {
+    if (PlatformInfo.isMobile) {
+      richTextMobileTabletController?.webViewLifecycleManager?.resume();
+    }
     if (currentOverlayContext != null && currentContext != null && failure.exception is! PickFileCanceledException) {
       appToast.showToastErrorMessage(
         currentOverlayContext!,
@@ -1197,6 +1203,9 @@ class ComposerController extends BaseController
   }
 
   void _handlePickImageFailure(LocalImagePickerFailure failure) {
+    if (PlatformInfo.isMobile) {
+      richTextMobileTabletController?.webViewLifecycleManager?.resume();
+    }
     if (currentOverlayContext != null && currentContext != null && failure.exception is! PickFileCanceledException) {
       appToast.showToastErrorMessage(
         currentOverlayContext!,
@@ -1205,13 +1214,19 @@ class ComposerController extends BaseController
   }
 
   void _handlePickFileSuccess(LocalFilePickerSuccess success) {
+    if (PlatformInfo.isMobile) {
+      richTextMobileTabletController?.webViewLifecycleManager?.resume();
+    }
     uploadController.validateTotalSizeAttachmentsBeforeUpload(
       totalSizePreparedFiles: success.pickedFiles.totalSize,
       onValidationSuccess: () => uploadAttachmentsAction(pickedFiles: success.pickedFiles)
     );
   }
 
   void _handlePickImageSuccess(LocalImagePickerSuccess success) {
+    if (PlatformInfo.isMobile) {
+      richTextMobileTabletController?.webViewLifecycleManager?.resume();
+    }
     uploadController.validateTotalSizeInlineAttachmentsBeforeUpload(
       totalSizePreparedFiles: success.fileInfo.fileSize,
       onValidationSuccess: () => uploadAttachmentsAction(pickedFiles: [success.fileInfo.withInline()])
@@ -1739,7 +1754,7 @@ class ComposerController extends BaseController
     }
   }
 
-  void insertImage(BuildContext context, double maxWith) async {
+  void insertImage(BuildContext context, double maxWith) {
     clearFocus(context);
 
     if (responsiveUtils.isMobile(context)) {
@@ -1748,6 +1763,9 @@ class ComposerController extends BaseController
       maxWithEditor = maxWith - 70;
     }
 
+    if (PlatformInfo.isMobile) {
+      richTextMobileTabletController?.webViewLifecycleManager?.pause();
+    }
     consumeState(_localImagePickerInteractor.execute());
   }
 

lib/features/composer/presentation/controller/rich_text_mobile_tablet_controller.dart

@@ -1,18 +1,19 @@
 import 'dart:io';
-
 import 'package:core/utils/app_logger.dart';
 import 'package:core/utils/html/html_utils.dart';
 import 'package:core/utils/platform_info.dart';
 import 'package:file_picker/file_picker.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:get/get.dart';
 import 'package:rich_text_composer/rich_text_composer.dart';
+import 'package:tmail_ui_user/features/composer/presentation/controller/web_view_lifecycle_manager.dart';
 import 'package:tmail_ui_user/features/composer/presentation/model/header_style_type.dart';
 import 'package:tmail_ui_user/features/composer/presentation/model/inline_image.dart';
 import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
 
 class RichTextMobileTabletController extends GetxController {
   HtmlEditorApi? htmlEditorApi;
+  WebViewLifecycleManager? webViewLifecycleManager;
 
   final RichTextController richTextController = RichTextController();
 
@@ -72,9 +73,14 @@ class RichTextMobileTabletController extends GetxController {
     }
   }
 
+  void onInitWebViewLifecycleManager(InAppWebViewController? controller) {
+    webViewLifecycleManager = WebViewLifecycleManager(controller);
+  }
+
   @override
   void onClose() {
     richTextController.dispose();
+    webViewLifecycleManager = null;
     htmlEditorApi = null;
     super.onClose();
   }

lib/features/composer/presentation/controller/web_view_lifecycle_manager.dart

@@ -0,0 +1,28 @@
+import 'package:core/utils/app_logger.dart';
+import 'package:rich_text_composer/rich_text_composer.dart';
+
+class WebViewLifecycleManager {
+  final InAppWebViewController? controller;
+
+  WebViewLifecycleManager(this.controller);
+
+  Future<void> pause() async {
+    if (controller == null) return;
+    try {
+      await controller!.pauseTimers();
+      await controller!.pause();
+    } catch (e) {
+      logError('$runtimeType::pause:[WebViewLifecycleManager] pause error: $e');
+    }
+  }
+
+  Future<void> resume() async {
+    if (controller == null) return;
+    try {
+      await controller!.resume();
+      await controller!.resumeTimers();
+    } catch (e) {
+      logError('$runtimeType::resume:[WebViewLifecycleManager] resume error: $e');
+    }
+  }
+}

lib/features/upload/domain/usecases/local_file_picker_interactor.dart

@@ -1,6 +1,9 @@
 
+import 'dart:io';
+
 import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/state/success.dart';
+import 'package:core/utils/app_logger.dart';
 import 'package:core/utils/platform_info.dart';
 import 'package:dartz/dartz.dart';
 import 'package:file_picker/file_picker.dart';
@@ -14,6 +17,7 @@ class LocalFilePickerInteractor {
 
   Stream<Either<Failure, Success>> execute({FileType fileType = FileType.any}) async* {
     try {
+      log('$runtimeType::execute:Memory info: ${(ProcessInfo.currentRss / (1024 * 1024)).toStringAsFixed(2)} MB');
       yield Right<Failure, Success>(LocalFilePickerLoading());
 
       final filesResult = await FilePicker.platform.pickFiles(