Ladybird: Do not enable the reload button if history is empty

Not much of an issue currently, but will be once tabs are used to render
plain HTML.

Ladybird/AppKit/UI/TabController.mm

@@ -139,6 +139,10 @@ enum class IsHistoryNavigation {
 
 - (void)reload:(id)sender
 {
+    if (m_history.is_empty()) {
+        return;
+    }
+
     m_is_history_navigation = IsHistoryNavigation::Yes;
 
     auto url = m_history.current().url;
@@ -179,6 +183,9 @@ enum class IsHistoryNavigation {
 
     auto* navigate_forward_button = (NSButton*)[[self navigate_forward_toolbar_item] view];
     [navigate_forward_button setEnabled:m_history.can_go_forward()];
+
+    auto* reload_button = (NSButton*)[[self reload_toolbar_item] view];
+    [reload_button setEnabled:!m_history.is_empty()];
 }
 
 - (void)showTabOverview:(id)sender
@@ -232,6 +239,7 @@ enum class IsHistoryNavigation {
     if (!_reload_toolbar_item) {
         auto* button = [self create_button:NSImageNameRefreshTemplate
                                with_action:@selector(reload:)];
+        [button setEnabled:NO];
 
         _reload_toolbar_item = [[NSToolbarItem alloc] initWithItemIdentifier:TOOLBAR_RELOAD_IDENTIFIER];
         [_reload_toolbar_item setView:button];

Ladybird/Qt/BrowserWindow.cpp

@@ -401,6 +401,7 @@ BrowserWindow::BrowserWindow(Optional<URL> const& initial_url, Browser::CookieJa
     m_reload_action->setShortcuts(QKeySequence::keyBindings(QKeySequence::StandardKey::Refresh));
     m_go_back_action->setEnabled(false);
     m_go_forward_action->setEnabled(false);
+    m_reload_action->setEnabled(false);
 
     if (initial_url.has_value()) {
         auto initial_url_string = qstring_from_ak_deprecated_string(initial_url->serialize());

Ladybird/Qt/Tab.cpp

@@ -132,6 +132,7 @@ Tab::Tab(BrowserWindow* window, StringView webdriver_content_ipc_path, WebView::
 
         m_window->go_back_action().setEnabled(m_history.can_go_back());
         m_window->go_forward_action().setEnabled(m_history.can_go_forward());
+        m_window->reload_action().setEnabled(!m_history.is_empty());
 
         if (m_inspector_widget)
             m_inspector_widget->clear_dom_json();
@@ -587,6 +588,9 @@ void Tab::forward()
 
 void Tab::reload()
 {
+    if (m_history.is_empty())
+        return;
+
     m_is_history_navigation = true;
     view().load(m_history.current().url.to_deprecated_string());
 }

Userland/Applications/Browser/History.h

@@ -35,6 +35,8 @@ public:
     bool can_go_forward(int steps = 1) { return (m_current + steps) < static_cast<int>(m_items.size()); }
     void clear();
 
+    bool is_empty() const { return m_items.is_empty(); }
+
 private:
     Vector<URLTitlePair> m_items;
     int m_current { -1 };

Userland/Applications/Browser/Tab.cpp

@@ -732,6 +732,9 @@ URL Tab::url() const
 
 void Tab::reload()
 {
+    if (m_history.is_empty())
+        return;
+
     load(url());
 }
 
@@ -762,6 +765,7 @@ void Tab::update_actions()
         return;
     window.go_back_action().set_enabled(m_history.can_go_back());
     window.go_forward_action().set_enabled(m_history.can_go_forward());
+    window.reload_action().set_enabled(!m_history.is_empty());
 }
 
 ErrorOr<void> Tab::bookmark_current_url()