Browser: Have `BookmarksBarWidget` signal bookmark changes for `Tab`

This fixes an issue with a tab not updating its bookmark button when
we either edit or delete a bookmark and the tab happens to be on the
same page associated with the bookmark URL. `BookmarksBarWidget`
"signals" a `Tab` object of any bookmark changes, where it will
update the bookmark button depending on if the current URL is an
existing bookmark or not.

Userland/Applications/Browser/BookmarksBarWidget.cpp

@@ -292,10 +292,15 @@ bool BookmarksBarWidget::remove_bookmark(DeprecatedString const& url)
             auto& json_model = *static_cast<GUI::JsonArrayModel*>(model());
 
             auto const item_removed = json_model.remove(item_index);
-            if (item_removed)
-                json_model.store();
+            if (!item_removed)
+                return false;
 
-            return item_removed;
+            json_model.store();
+
+            if (on_bookmark_change)
+                on_bookmark_change();
+
+            return true;
         }
     }
 
@@ -315,8 +320,8 @@ bool BookmarksBarWidget::add_bookmark(DeprecatedString const& url, DeprecatedStr
     if (!was_bookmark_added)
         return false;
 
-    if (on_bookmark_add)
-        on_bookmark_add(url);
+    if (on_bookmark_change)
+        on_bookmark_change();
 
     if (edit_bookmark(url, PerformEditOn::NewBookmark))
         return true;
@@ -333,9 +338,14 @@ bool BookmarksBarWidget::edit_bookmark(DeprecatedString const& url, PerformEditO
 
         if (item_url == url) {
             auto values = BookmarkEditor::edit_bookmark(window(), item_title, item_url, perform_edit_on);
-            return update_model(values, [item_index](auto& model, auto&& values) {
+            auto was_bookmark_changed = update_model(values, [item_index](auto& model, auto&& values) {
                 return model.set(item_index, move(values));
             });
+
+            if (was_bookmark_changed && on_bookmark_change)
+                on_bookmark_change();
+
+            return was_bookmark_changed;
         }
     }
 

Userland/Applications/Browser/BookmarksBarWidget.h

@@ -34,7 +34,7 @@ public:
 
     Function<void(DeprecatedString const& url, Open)> on_bookmark_click;
     Function<void(DeprecatedString const&, DeprecatedString const&)> on_bookmark_hover;
-    Function<void(DeprecatedString const& url)> on_bookmark_add;
+    Function<void()> on_bookmark_change;
 
     bool contains_bookmark(DeprecatedString const& url);
     bool remove_bookmark(DeprecatedString const& url);

Userland/Applications/Browser/Tab.cpp

@@ -606,7 +606,6 @@ void Tab::bookmark_current_url()
     } else {
         BookmarksBarWidget::the().add_bookmark(url, m_title);
     }
-    update_bookmark_button(url);
 }
 
 void Tab::update_bookmark_button(DeprecatedString const& url)
@@ -635,10 +634,8 @@ void Tab::did_become_active()
         m_statusbar->set_text(url);
     };
 
-    BookmarksBarWidget::the().on_bookmark_add = [this](auto& url) {
-        auto current_url = this->url().to_deprecated_string();
-        if (current_url == url)
-            update_bookmark_button(current_url);
+    BookmarksBarWidget::the().on_bookmark_change = [this]() {
+        update_bookmark_button(url().to_deprecated_string());
     };
 
     BookmarksBarWidget::the().remove_from_parent();