Avoiding add signal into the EmailRow, but translate seems hard to do since the webview is in the inside of message.

src/client/conversation-viewer/conversation-email.vala

@@ -421,7 +421,7 @@ public class ConversationEmail : Gtk.Box, Geary.BaseInterface {
     public signal void view_source();
 
     /** Fired when a internal link is activated */
-    public signal void internal_link_activated(uint y);
+    public signal void internal_link_activated(int y);
 
     /** Fired when the user selects text in a message. */
     internal signal void body_selection_changed(bool has_selection);

src/client/conversation-viewer/conversation-list-box.vala

@@ -327,15 +327,10 @@ public class ConversationListBox : Gtk.ListBox, Geary.BaseInterface {
         public ConversationEmail view { get; private set; }
 
 
-        /** Fired when a internal link is activated */
-        public signal void internal_link_activated(EmailRow view, uint y);
-
-
         public EmailRow(ConversationEmail view) {
             base(view.email);
             this.view = view;
             add(view);
-            connect_email_signals(view);
         }
 
         public override async void expand()
@@ -363,12 +358,6 @@ public class ConversationListBox : Gtk.ListBox, Geary.BaseInterface {
             }
         }
 
-        private void connect_email_signals(ConversationEmail email) {
-            email.internal_link_activated.connect((y) => {
-                internal_link_activated(this, y);
-            });
-        }
-
     }
 
 
@@ -916,6 +905,10 @@ public class ConversationListBox : Gtk.ListBox, Geary.BaseInterface {
         );
         view.mark_email.connect(on_mark_email);
         view.mark_email_from_here.connect(on_mark_email_from_here);
+        view.internal_link_activated.connect((y) => {
+            EmailRow row = get_email_row_by_id(view.email.id);
+            on_internal_link_activated(row, y);
+        });
         view.body_selection_changed.connect((email, has_selection) => {
                 this.body_selected_view = has_selection ? email : null;
             });
@@ -941,8 +934,6 @@ public class ConversationListBox : Gtk.ListBox, Geary.BaseInterface {
         }
         email_added(view);
 
-        row.internal_link_activated.connect(on_internal_link_activated);
-
         return row;
     }
 
@@ -1187,7 +1178,7 @@ public class ConversationListBox : Gtk.ListBox, Geary.BaseInterface {
         }
     }
 
-    private void on_internal_link_activated(EmailRow row, uint y) {
+    private void on_internal_link_activated(EmailRow row, int y) {
         scroll_to_anchor(row, y);
     }
 

src/client/conversation-viewer/conversation-message.vala

@@ -263,7 +263,7 @@ public class ConversationMessage : Gtk.Grid, Geary.BaseInterface {
     public signal void link_activated(string link);
 
     /** Fired when the user clicks a internal link in the email. */
-    public signal void internal_link_activated(uint y);
+    public signal void internal_link_activated(int y);
 
     /** Fired when the user requests remote images be loaded. */
     public signal void flag_remote_images();
@@ -1169,10 +1169,20 @@ public class ConversationMessage : Gtk.Grid, Geary.BaseInterface {
         if (link.contains(INTERNAL_ANCHOR_PREFIX)) {
             long start = INTERNAL_ANCHOR_PREFIX.length;
             long end = link.length;
-            this.web_view.get_anchor_target_y.begin(link.substring(start, end - start), (obj, res) => {
+            string anchor_body = link.substring(start, end - start);
-                uint y = this.web_view.get_anchor_target_y.end(res);
+            this.web_view.get_anchor_target_y.begin(anchor_body, (obj, res) => {
-                internal_link_activated(y);
+                    try {
-            });
+                        int y = this.web_view.get_anchor_target_y.end(res);
+                        //Workaround for JS.Error does not work well with primitive type.
+                        if (y > 0) {
+                            internal_link_activated(y);
+                        } else {
+                            debug("Failed to get anchor destination");
+                        }
+                    } catch (Error err) {
+                        debug("Failed to get anchor destination");
+                    }
+                });
         } else {
             link_activated(link);
         }

src/client/conversation-viewer/conversation-web-view.vala

@@ -99,11 +99,11 @@ public class ConversationWebView : ClientWebView {
     /**
      * Returns the y value for a element, by its id
      */
-    public async uint? get_anchor_target_y(string id) throws Error {
+    public async int? get_anchor_target_y(string anchor_body) throws Error {
         WebKit.JavascriptResult result = yield call(
-            Geary.JS.callable("geary.getAnchorTargetY").string(id), null
+            Geary.JS.callable("geary.getAnchorTargetY").string(anchor_body), null
         );
-        return (uint) WebKitUtil.to_number(result);
+        return (int) WebKitUtil.to_number(result);
     }
 
     /**

ui/conversation-web-view.js

@@ -244,9 +244,21 @@ ConversationPageState.prototype = {
         }
         return value;
     },
-    getAnchorTargetY: function(id) {
+    getAnchorTargetY: function(anchor) {
-        let anchorTarget = document.getElementById(id);
+        let targetById = document.getElementById(anchor);
-        return anchorTarget.getBoundingClientRect().top+document.documentElement.scrollTop;
+        let targetByName = document.getElementsByName(anchor);
+        let finalTarget = null;
+        if (targetById != null) {
+            finalTarget = targetById;
+        } else if (targetByNmae.length > 0) {
+            finalTarget = targetByName[0];
+        }
+        if (finalTarget != null) {
+            return finalTarget.getBoundingClientRect().top +
+                document.documentElement.scrollTop;
+        } else {
+            return -1;
+        }
     },
     linkClicked: function(link) {
         let cancelClick = false;