Fix displaying the external url of the link tag

core/lib/core.dart

@@ -20,6 +20,10 @@ export 'presentation/utils/responsive_utils.dart';
 export 'presentation/utils/keyboard_utils.dart';
 export 'presentation/utils/style_utils.dart';
 export 'presentation/utils/app_toast.dart';
+export 'presentation/utils/html_transformer/html_template.dart';
+export 'presentation/utils/html_transformer/html_transform.dart';
+export 'presentation/utils/html_transformer/transform_configuration.dart';
+export 'presentation/utils/html_transformer/dom/add_tooltip_link_transformers.dart';
 export 'data/utils/device_manager.dart';
 export 'utils/app_logger.dart';
 

core/lib/presentation/utils/html_transformer/base/dom_transformer.dart

@@ -13,8 +13,10 @@ abstract class DomTransformer {
   Future<void> process(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient,
+      }
   );
 
   /// Adds a HEAD element if necessary

core/lib/presentation/utils/html_transformer/base/text_transformer.dart

@@ -1,9 +1,7 @@
 
-import 'package:core/presentation/utils/html_transformer/transform_configuration.dart';
-
 /// Transforms plain text messages.
 abstract class TextTransformer {
   const TextTransformer();
 
-  String transform(String text, String message, TransformConfiguration configuration);
+  String process(String text);
 }

core/lib/presentation/utils/html_transformer/dom/add_tooltip_link_transformers.dart

@@ -1,40 +1,36 @@
 
 import 'package:core/data/network/dio_client.dart';
 import 'package:core/presentation/utils/html_transformer/base/dom_transformer.dart';
-import 'package:core/utils/app_logger.dart';
 import 'package:html/dom.dart';
 
-class LinkTransformer extends DomTransformer {
+class AddTooltipLinkTransformer extends DomTransformer {
 
-  const LinkTransformer();
+  const AddTooltipLinkTransformer();
 
   @override
   Future<void> process(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient
+      }
   ) async {
-    final linkElements = document.getElementsByTagName('a');
+    final linkElements = document.querySelectorAll('a[href^="http"]');
     await Future.wait(linkElements.map((linkElement) async {
-      linkElement.attributes['rel'] = 'noopener noreferrer';
       _addToolTipWhenHoverLink(linkElement);
     }));
   }
 
   void _addToolTipWhenHoverLink(Element element) {
-    log('LinkTransformer::_addToolTipWhenHoverLink(): Before: ${element.outerHtml}');
     final url = element.attributes['href'];
     final text = element.text;
     final children = element.children;
-    if (children.isEmpty && text.isNotEmpty && url?.isNotEmpty == true) {
+    if (children.isEmpty && text.isNotEmpty && url != null) {
       final innerHtml = element.innerHtml;
       final tagClass = element.attributes['class'];
       element.attributes['class'] = '$tagClass tooltip';
-      if (text.isNotEmpty && url != null && url.isNotEmpty) {
-        element.innerHtml = innerHtml + textHasToolTip(url);
-      }
-      log('LinkTransformer::_addToolTipWhenHoverLink(): After: ${element.outerHtml}');
+      element.innerHtml = innerHtml + textHasToolTip(url);
     }
   }
 

core/lib/presentation/utils/html_transformer/dom/blockquoted_transformers.dart

@@ -11,8 +11,10 @@ class BlockQuotedTransformer extends DomTransformer {
   Future<void> process(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient
+      }
   ) async {
     final quotedElements = document.getElementsByTagName('blockquote');
     await Future.wait(quotedElements.map((quotedElement) async {

core/lib/presentation/utils/html_transformer/dom/image_transformers.dart

@@ -14,8 +14,10 @@ class ImageTransformer extends DomTransformer {
   Future<void> process(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient
+      }
   ) async {
     final imageElements = document.getElementsByTagName('img');
 
@@ -29,7 +31,7 @@ class ImageTransformer extends DomTransformer {
       ) {
         final cid = src.replaceFirst('cid:', '').trim();
         final cidUrlDownload = mapUrlDownloadCID[cid];
-        if (cidUrlDownload != null && cidUrlDownload.isNotEmpty) {
+        if (cidUrlDownload != null && cidUrlDownload.isNotEmpty && dioClient != null) {
           final imgBase64 = await loadAsyncNetworkImageToBase64(dioClient, cidUrlDownload);
           if (imgBase64 != null && imgBase64.isNotEmpty) {
             imageElement.attributes['src'] = 'data:image/jpeg;base64,$imgBase64';

core/lib/presentation/utils/html_transformer/dom/meta_transformers.dart

@@ -1,50 +0,0 @@
-
-import 'package:core/data/network/dio_client.dart';
-import 'package:html/dom.dart';
-import 'package:core/presentation/utils/html_transformer/base/dom_transformer.dart';
-
-class MetaTransformer extends DomTransformer {
-
-  static final Element _viewPortMetaElement = Element.html(
-    '<meta name="viewport" content="width=device-width, initial-scale=1.0">');
-  static final Element _contentTypeMetaElement = Element.html(
-    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">');
-
-  const MetaTransformer();
-
-  @override
-  Future<void> process(
-      Document document,
-      String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
-  ) async {
-    final metaElements = document.getElementsByTagName('meta');
-    var viewportNeedsToBeAdded = true;
-    var contentTypeNeedsToBeAdded = true;
-
-    await Future.wait(metaElements.map((metaElement) async {
-      if (metaElement.attributes['name'] == 'viewport') {
-        viewportNeedsToBeAdded = false;
-        metaElement.attributes['content'] = 'width=device-width, initial-scale=1.0';
-      } else if (metaElement.attributes['charset'] != null) {
-        metaElement.attributes['charset'] = 'utf-8';
-      } else {
-        final httpEquiv = metaElement.attributes['http-equiv'];
-        if (httpEquiv != null && httpEquiv.toLowerCase() == 'content-type') {
-          contentTypeNeedsToBeAdded = false;
-          metaElement.attributes['content'] = 'text/html; charset=utf-8';
-        }
-      }
-    }));
-
-    if (contentTypeNeedsToBeAdded) {
-      ensureDocumentHeadIsAvailable(document);
-      document.head!.append(_contentTypeMetaElement);
-    }
-    if (viewportNeedsToBeAdded) {
-      ensureDocumentHeadIsAvailable(document);
-      document.head!.append(_viewPortMetaElement);
-    }
-  }
-}

core/lib/presentation/utils/html_transformer/dom/script_transformers.dart

@@ -11,8 +11,10 @@ class RemoveScriptTransformer extends DomTransformer {
   Future<void> process(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
-      DioClient dioClient
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient
+      }
   ) async {
     final scriptElements = document.getElementsByTagName('script');
     await Future.wait(scriptElements.map((scriptElement) async {

core/lib/presentation/utils/html_transformer/html_template.dart

@@ -0,0 +1,64 @@
+
+final tooltipLinkCss = '''
+  .tooltip .tooltiptext {
+    visibility: hidden;
+    max-width: 400px;
+    background-color: black;
+    color: #fff;
+    text-align: center;
+    border-radius: 6px;
+    padding: 5px 8px 5px 8px;
+    white-space: nowrap; 
+    overflow: hidden;
+    text-overflow: ellipsis;
+    position: absolute;
+    z-index: 1;
+  }
+  .tooltip:hover .tooltiptext {
+    visibility: visible;
+  }
+''';
+
+String generateHtml(String content, {
+  double? minHeight,
+  double? minWidth,
+  String? styleCSS,
+  String? javaScripts
+}) {
+  return '''
+    <!DOCTYPE html>
+    <html>
+    <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <style>
+      .tmail-content {
+        min-height: ${minHeight ?? 0}px;
+        min-width: ${minWidth ?? 0}px;
+        color: #000000;
+        font-family: Inter;
+        font-size: 16px;
+        font-style: normal;
+      }
+      table {
+        width: 100%;
+        max-width: 100%;
+      }
+      td {
+        padding: 13px;
+        margin: 0px;
+      }
+      th {
+        padding: 13px;
+        margin: 0px;
+      }
+      ${styleCSS ?? ''}
+    </style>
+    ${javaScripts ?? ''}
+    </head>
+    <body>
+    <div class="tmail-content">${content}</div>
+    </body>
+    </html> 
+  ''';
+}

core/lib/presentation/utils/html_transformer/html_transform.dart

@@ -7,17 +7,17 @@ class HtmlTransform {
 
   final String _contentHtml;
   Map<String, String>? mapUrlDownloadCID;
-  DioClient dioClient;
+  DioClient? dioClient;
 
   HtmlTransform(
     this._contentHtml,
-    this.dioClient,
-    this.mapUrlDownloadCID
+    {
+      this.mapUrlDownloadCID,
+      this.dioClient,
+    }
   );
 
   /// Transforms this message to HTML code.
-  /// Optionally specify the [transformConfiguration] to control all aspects of the transformation
-  /// - in that case other parameters are ignored.
   Future<String> transformToHtml({TransformConfiguration? transformConfiguration}) async {
     final document = await transformToDocument(transformConfiguration: transformConfiguration);
     return document.outerHtml;
@@ -26,7 +26,7 @@ class HtmlTransform {
   /// Transforms this message to Document.
   Future<Document> transformToDocument({TransformConfiguration? transformConfiguration}) async {
     transformConfiguration ??= TransformConfiguration.create();
-    final transformer = MessageContentTransformer(transformConfiguration, dioClient);
-    return await transformer.toDocument(_contentHtml, mapUrlDownloadCID);
+    final transformer = MessageContentTransformer(transformConfiguration);
+    return await transformer.toDocument(_contentHtml, mapUrlDownloadCID: mapUrlDownloadCID, dioClient: dioClient);
   }
 }

core/lib/presentation/utils/html_transformer/message_content_transformer.dart

@@ -7,24 +7,29 @@ import 'package:html/parser.dart' show parse;
 class MessageContentTransformer {
   /// The configuration used for the transformation
   final TransformConfiguration configuration;
-  final DioClient dioClient;
 
-  MessageContentTransformer(this.configuration, this.dioClient);
+  MessageContentTransformer(this.configuration);
 
   Future<void> transformDocument(
       Document document,
       String message,
-      Map<String, String>? mapUrlDownloadCID,
+      {
+        Map<String, String>? mapUrlDownloadCID,
+        DioClient? dioClient
+      }
   ) async {
-    await Future.wait(configuration.domTransformers.map((domTransformer) async {
-      await domTransformer.process(document, message, mapUrlDownloadCID, dioClient);
-    }));
+    await Future.wait([
+      if (configuration.domTransformers.isNotEmpty) ...configuration.domTransformers.map((domTransformer) async =>
+          domTransformer.process(document, message, mapUrlDownloadCID: mapUrlDownloadCID, dioClient: dioClient)),
+      if (configuration.textTransformers.isNotEmpty) ...configuration.textTransformers.map((textTransformer) async =>
+          textTransformer.process(message))
+    ]);
   }
 
-  Future<Document> toDocument(String message, Map<String, String>? mapUrlDownloadCID) async {
+  Future<Document> toDocument(String message, {Map<String, String>? mapUrlDownloadCID, DioClient? dioClient}) async {
     var html = message;
     final document = parse(html);
-    await transformDocument(document, message, mapUrlDownloadCID);
+    await transformDocument(document, message, mapUrlDownloadCID: mapUrlDownloadCID, dioClient: dioClient);
     return document;
   }
 }

core/lib/presentation/utils/html_transformer/text/convert_tags_text_transformer.dart

@@ -1,13 +0,0 @@
-
-import 'package:core/presentation/utils/html_transformer/base/text_transformer.dart';
-import 'package:core/presentation/utils/html_transformer/transform_configuration.dart';
-
-class ConvertTagsTextTransformer implements TextTransformer {
-
-  const ConvertTagsTextTransformer();
-
-  @override
-  String transform(String text, String message, TransformConfiguration configuration) {
-    return text.replaceAll('<', '&lt;').replaceAll('>', '&gt;');
-  }
-}

core/lib/presentation/utils/html_transformer/text/linebreak_text_transformer.dart

@@ -1,15 +0,0 @@
-
-import 'package:core/presentation/utils/html_transformer/base/text_transformer.dart';
-import 'package:core/presentation/utils/html_transformer/transform_configuration.dart';
-
-class LineBreakTextTransformer extends TextTransformer {
-
-  const LineBreakTextTransformer();
-
-  @override
-  String transform(String text, String message, TransformConfiguration configuration) {
-    text = text.replaceAll('\r\n', '<br/>');
-    text = text.replaceAll('\n', '<br/>');
-    return text;
-  }
-}

core/lib/presentation/utils/html_transformer/text/links_text_transformer.dart

@@ -1,47 +0,0 @@
-
-import 'package:core/presentation/utils/html_transformer/base/text_transformer.dart';
-import 'package:core/presentation/utils/html_transformer/transform_configuration.dart';
-
-class LinksTextTransformer extends TextTransformer {
-
-  static final RegExp schemeRegEx = RegExp(r'[a-z]{3,6}://');
-  // Not a perfect but good enough regular expression to match URLs in text.
-  // It also matches a space at the beginning and a dot at the end,
-  // so this is filtered out manually in the found matches
-  static final RegExp linkRegEx = RegExp(
-    r'(([a-z]{3,6}:\/\/)|(^|\s))([a-zA-Z0-9\-]+\.)+[a-z]{2,13}([\?\/]+[\.\?\=\&\%\/\w\+\-]*)?');
-  const LinksTextTransformer();
-
-  @override
-  String transform(String text, String message, TransformConfiguration configuration) {
-    final matches = linkRegEx.allMatches(text);
-    if (matches.isEmpty) {
-      return text;
-    }
-    final buffer = StringBuffer();
-    var end = 0;
-    for (final match in matches) {
-      if (match.end < text.length && text[match.end] == '@') {
-        // this is an email address, abort abort!
-        continue;
-      }
-      final originalGroup = match.group(0)!;
-      final group = originalGroup.trimLeft();
-      final start = match.start + originalGroup.length - group.length;
-      buffer.write(text.substring(end, start));
-      final endsWithDot = group.endsWith('.');
-      final urlText =
-          endsWithDot ? group.substring(0, group.length - 1) : group;
-      buffer.write('<a href="');
-      if (!group.startsWith(schemeRegEx)) {
-        buffer.write('https://');
-      }
-      buffer..write(urlText)..write('">')..write(urlText)..write('</a>');
-      end = endsWithDot ? match.end - 1 : match.end;
-    }
-    if (end < text.length) {
-      buffer.write(text.substring(end));
-    }
-    return buffer.toString();
-  }
-}

core/lib/presentation/utils/html_transformer/transform_configuration.dart

@@ -3,12 +3,7 @@ import 'package:core/presentation/utils/html_transformer/base/dom_transformer.da
 import 'package:core/presentation/utils/html_transformer/base/text_transformer.dart';
 import 'package:core/presentation/utils/html_transformer/dom/blockquoted_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/image_transformers.dart';
-import 'package:core/presentation/utils/html_transformer/dom/link_transformers.dart';
-import 'package:core/presentation/utils/html_transformer/dom/meta_transformers.dart';
 import 'package:core/presentation/utils/html_transformer/dom/script_transformers.dart';
-import 'package:core/presentation/utils/html_transformer/text/convert_tags_text_transformer.dart';
-import 'package:core/presentation/utils/html_transformer/text/linebreak_text_transformer.dart';
-import 'package:core/presentation/utils/html_transformer/text/links_text_transformer.dart';
 
 /// Contains the configuration for all transformations.
 class TransformConfiguration {
@@ -37,37 +32,26 @@ class TransformConfiguration {
   ///
   /// Any specified [customDomTransformers] or [customTextTransformers] are being appended to the standard transformers.
   static TransformConfiguration create({
-    bool? blockExternalImages,
-    int? maxImageWidth,
     List<DomTransformer>? customDomTransformers,
     List<TextTransformer>? customTextTransformers
   }) {
-    final domTransformers = (customDomTransformers != null)
-        ? [...standardDomTransformers, ...customDomTransformers]
+    final domTransformers = (customDomTransformers != null && customDomTransformers.isNotEmpty)
+        ? [...customDomTransformers]
         : [...standardDomTransformers];
-    final textTransformers = (customTextTransformers != null)
-        ? [...standardTextTransformers, ...customTextTransformers]
+    final textTransformers = (customTextTransformers != null && customTextTransformers.isNotEmpty)
+        ? [...customTextTransformers]
         : standardTextTransformers;
-    maxImageWidth ??= standardMaxImageWidth;
     return TransformConfiguration(
       domTransformers,
       textTransformers
     );
   }
 
-  static const int? standardMaxImageWidth = null;
-
   static const List<DomTransformer> standardDomTransformers = [
-    MetaTransformer(),
     RemoveScriptTransformer(),
-    ImageTransformer(),
-    LinkTransformer(),
     BlockQuotedTransformer(),
+    ImageTransformer(),
   ];
 
-  static const List<TextTransformer> standardTextTransformers = [
-    ConvertTagsTextTransformer(),
-    LinksTextTransformer(),
-    LineBreakTextTransformer(),
-  ];
+  static const List<TextTransformer> standardTextTransformers = [];
 }

core/lib/presentation/views/html_viewer/html_content_viewer_on_web_widget.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'dart:math' as math;
 
 import 'package:core/presentation/extensions/color_extension.dart';
+import 'package:core/presentation/utils/html_transformer/html_template.dart';
 import 'package:core/presentation/views/html_viewer/html_viewer_controller_for_web.dart';
 import 'package:core/utils/app_logger.dart';
 import 'package:flutter/material.dart';
@@ -36,16 +37,16 @@ class _HtmlContentViewerOnWebState extends State<HtmlContentViewerOnWeb> {
 
   /// The view ID for the IFrameElement. Must be unique.
   late String createdViewId;
-  /// The actual height of the editor, used to automatically set the height
+  /// The actual height of the content view, used to automatically set the height
   late double actualHeight;
-  /// The actual width of the editor, used to automatically set the width
+  /// The actual width of the content view, used to automatically set the width
   late double actualWidth;
 
   Future<bool>? webInit;
   String? _htmlData;
   bool _isLoading = true;
-  int minHeight = 100;
-  int minWidth = 300;
+  double minHeight = 100;
+  double minWidth = 300;
 
   @override
   void initState() {
@@ -64,7 +65,7 @@ class _HtmlContentViewerOnWebState extends State<HtmlContentViewerOnWeb> {
   }
 
   String _generateHtmlDocument(String content) {
-    final htmlScripts = '''
+    final webViewActionScripts = '''
       <script type="text/javascript">
         window.parent.addEventListener('message', handleMessage, false);
         window.addEventListener('click', handleOnClickLink, true);
@@ -122,63 +123,11 @@ class _HtmlContentViewerOnWebState extends State<HtmlContentViewerOnWeb> {
       </script>
     ''';
 
-    final tooltipLinkCss = '''
-      .tooltip .tooltiptext {
-        visibility: hidden;
-        max-width: 400px;
-        background-color: black;
-        color: #fff;
-        text-align: center;
-        border-radius: 6px;
-        padding: 5px 8px 5px 8px;
-        white-space: nowrap; 
-        overflow: hidden;
-        text-overflow: ellipsis;
-        position: absolute;
-        z-index: 1;
-      }
-      .tooltip:hover .tooltiptext {
-        visibility: visible;
-      }
-    ''';
-
-    final htmlTemplate = '''
-      <!DOCTYPE html>
-      <html>
-      <head>
-      <meta name="viewport" content="width=device-width, initial-scale=1.0">
-      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-      <style>
-        #editor {
-          outline: 0px solid transparent;
-          min-height: ${minHeight}px;
-          min-width: ${minWidth}px;
-          color: #000000;
-          font-family: Inter;
-          font-size: 16px;
-          font-style: normal;
-        }
-        table {
-          width: 100%;
-          max-width: 100%;
-        }
-        td {
-          padding: 13px;
-          margin: 0px;
-        }
-        th {
-          padding: 13px;
-          margin: 0px;
-        }
-        $tooltipLinkCss
-      </style>
-      $htmlScripts
-      </head>
-      <body>
-      <div id="editor">$content</div>
-      </body>
-      </html> 
-    ''';
+    final htmlTemplate = generateHtml(content,
+      minHeight: minHeight,
+      minWidth: minWidth,
+      styleCSS: tooltipLinkCss,
+      javaScripts: webViewActionScripts);
 
     return htmlTemplate;
   }

core/lib/presentation/views/html_viewer/html_content_viewer_widget.dart

@@ -43,7 +43,8 @@ class _HtmlContentViewState extends State<HtmlContentViewer> {
 
   double? _webViewHeight = 1.0;
   double? _webViewWidth = 1.0;
-  int minHeight = 100;
+  double minHeight = 100;
+  double minWidth = 300;
   String? _htmlData;
   late WebViewController _webViewController;
   bool _isLoading = true;
@@ -56,47 +57,7 @@ class _HtmlContentViewState extends State<HtmlContentViewer> {
   }
 
   String _generateHtmlDocument(String content) {
-    final htmlTemplate = '''
-      <!DOCTYPE html>
-      <html>
-      <head>
-      <meta name="viewport" content="width=device-width, initial-scale=1.0">
-      <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-      <style>
-        #editor {
-          outline: 0px solid transparent;
-          min-height: ${minHeight}px;
-          min-width: 300px;
-          color: #182952;
-          font-family: verdana;
-        }
-        table {
-          width: 100%;
-          max-width: 100%;
-        }
-        td {
-          padding: 13px;
-          margin: 0px;
-        }
-        th {
-          padding: 13px;
-          margin: 0px;
-        }
-      </style>
-      <script>
-        var documentHeight;
-
-        function onLoaded() {
-          documentHeight = document.body.scrollHeight;
-          document.execCommand("styleWithCSS", false, true);
-        }
-      </script>
-      </head>
-      <body onload="onLoaded();">
-      <div id="editor">$content</div>
-      </body>
-      </html> 
-    ''';
+    final htmlTemplate = generateHtml(content);
     return htmlTemplate;
   }
 

lib/features/email/data/datasource/html_datasource.dart

@@ -6,4 +6,6 @@ abstract class HtmlDataSource {
     EmailContent emailContent,
     Map<String, String> mapUrlDownloadCID
   );
+
+  Future<EmailContent> addTooltipWhenHoverOnLink(EmailContent emailContent);
 }

lib/features/email/data/datasource_impl/html_datasource_impl.dart

@@ -21,4 +21,13 @@ class HtmlDataSourceImpl extends HtmlDataSource {
       throw error;
     });
   }
+
+  @override
+  Future<EmailContent> addTooltipWhenHoverOnLink(EmailContent emailContent) {
+    return Future.sync(() async {
+      return await _htmlAnalyzer.addTooltipWhenHoverOnLink(emailContent);
+    }).catchError((error) {
+      throw error;
+    });
+  }
 }

lib/features/email/data/local/html_analyzer.dart

@@ -1,6 +1,5 @@
 
 import 'package:core/core.dart';
-import 'package:core/presentation/utils/html_transformer/html_transform.dart';
 import 'package:model/model.dart';
 
 class HtmlAnalyzer {
@@ -14,12 +13,24 @@ class HtmlAnalyzer {
       case EmailContentType.textHtml:
         final htmlTransform = HtmlTransform(
             emailContent.content,
-            dioClient,
-            mapUrlDownloadCID);
+            dioClient: dioClient,
+            mapUrlDownloadCID: mapUrlDownloadCID);
         final htmlContent = await htmlTransform.transformToHtml();
         return EmailContent(emailContent.type, htmlContent);
       default:
         return emailContent;
     }
   }
+
+  Future<EmailContent> addTooltipWhenHoverOnLink(EmailContent emailContent) async {
+    switch(emailContent.type) {
+      case EmailContentType.textHtml:
+        final htmlTransform = HtmlTransform(emailContent.content);
+        final htmlContent = await htmlTransform.transformToHtml(
+            transformConfiguration: TransformConfiguration.create(customDomTransformers: [AddTooltipLinkTransformer()]));
+        return EmailContent(emailContent.type, htmlContent);
+      default:
+        return emailContent;
+    }
+  }
 }

lib/features/email/data/repository/email_repository_impl.dart

@@ -124,4 +124,11 @@ class EmailRepositoryImpl extends EmailRepository {
   Future<bool> deleteEmailPermanently(AccountId accountId, EmailId emailId) {
     return emailDataSource.deleteEmailPermanently(accountId, emailId);
   }
+
+  @override
+  Future<List<EmailContent>> addTooltipWhenHoverOnLink(List<EmailContent> emailContents) {
+    return Future.wait(emailContents
+      .map((emailContent) => _htmlDataSource.addTooltipWhenHoverOnLink(emailContent))
+      .toList());
+  }
 }

lib/features/email/domain/repository/email_repository.dart

@@ -52,6 +52,8 @@ abstract class EmailRepository {
     AccountId accountId
   );
 
+  Future<List<EmailContent>> addTooltipWhenHoverOnLink(List<EmailContent> emailContents);
+
   Future<Email?> saveEmailAsDrafts(AccountId accountId, Email email);
 
   Future<bool> removeEmailDrafts(AccountId accountId, EmailId emailId);

lib/features/email/domain/state/get_email_content_state.dart

@@ -3,12 +3,13 @@ import 'package:model/model.dart';
 
 class GetEmailContentSuccess extends UIState {
   final List<EmailContent> emailContents;
+  final List<EmailContent> emailContentsDisplayed;
   final List<Attachment> attachments;
 
-  GetEmailContentSuccess(this.emailContents, this.attachments);
+  GetEmailContentSuccess(this.emailContents, this.emailContentsDisplayed, this.attachments);
 
   @override
-  List<Object?> get props => [emailContents, attachments];
+  List<Object?> get props => [emailContents, emailContentsDisplayed, attachments];
 }
 
 class GetEmailContentFailure extends FeatureFailure {

lib/features/email/domain/usecases/get_email_content_interactor.dart

@@ -1,4 +1,5 @@
 import 'package:core/core.dart';
+import 'package:flutter/foundation.dart';
 import 'package:model/model.dart';
 import 'package:dartz/dartz.dart';
 import 'package:jmap_dart_client/jmap/account_id.dart';
@@ -22,7 +23,10 @@ class GetEmailContentInteractor {
             email.allAttachments.listAttachmentsDisplayedInContent,
             baseDownloadUrl,
             accountId);
-        yield Right<Failure, Success>(GetEmailContentSuccess(newEmailContents, email.allAttachments));
+        final newEmailContentsDisplayed = kIsWeb
+            ? await emailRepository.addTooltipWhenHoverOnLink(newEmailContents)
+            : newEmailContents;
+        yield Right<Failure, Success>(GetEmailContentSuccess(newEmailContents, newEmailContentsDisplayed, email.allAttachments));
       } else {
         yield Left(GetEmailContentFailure(null));
       }

lib/features/email/presentation/email_controller.dart

@@ -65,6 +65,7 @@ class EmailController extends BaseController {
   final emailContents = <EmailContent>[].obs;
   final attachments = <Attachment>[].obs;
   EmailId? _currentEmailId;
+  List<EmailContent>? initialEmailContents;
 
   PresentationMailbox? get currentMailbox => mailboxDashBoardController.selectedMailbox.value;
 
@@ -152,7 +153,8 @@ class EmailController extends BaseController {
   }
 
   void _getEmailContentSuccess(GetEmailContentSuccess success) {
-    emailContents.value = success.emailContents;
+    emailContents.value = success.emailContentsDisplayed;
+    initialEmailContents = success.emailContents;
     attachments.value = success.attachments;
   }
 
@@ -161,6 +163,7 @@ class EmailController extends BaseController {
     emailAddressExpandMode.value = ExpandMode.COLLAPSE;
     isDisplayFullEmailAddress.value = false;
     emailContents.clear();
+    initialEmailContents?.clear();
     attachments.clear();
   }
 
@@ -592,7 +595,7 @@ class EmailController extends BaseController {
       final arguments = ComposerArguments(
           emailActionType: emailActionType,
           presentationEmail: mailboxDashBoardController.selectedEmail.value!,
-          emailContents: emailContents,
+          emailContents: initialEmailContents,
           attachments: attachments,
           mailboxRole: mailboxDashBoardController.selectedMailbox.value?.role);