Browser: Add reset zoom level button to toolbar

This button shows the current zoom level and when clicked resets
the zoom back to 100%. It is only displayed for zoom levels other
than 100%.

Userland/Applications/Browser/BrowserWindow.cpp

@@ -84,7 +84,7 @@ BrowserWindow::BrowserWindow(CookieJar& cookie_jar, URL url)
         auto& tab = static_cast<Browser::Tab&>(active_widget);
         set_window_title_for_tab(tab);
         tab.did_become_active();
-        update_zoom_menu_text();
+        update_displayed_zoom_level();
     };
 
     m_tab_widget->on_middle_click = [](auto& clicked_widget) {
@@ -178,21 +178,21 @@ void BrowserWindow::build_menus()
         [this](auto&) {
             auto& tab = active_tab();
             tab.view().zoom_in();
-            update_zoom_menu_text();
+            update_displayed_zoom_level();
         },
         this));
     m_zoom_menu->add_action(GUI::CommonActions::make_zoom_out_action(
         [this](auto&) {
             auto& tab = active_tab();
             tab.view().zoom_out();
-            update_zoom_menu_text();
+            update_displayed_zoom_level();
         },
         this));
     m_zoom_menu->add_action(GUI::CommonActions::make_reset_zoom_action(
         [this](auto&) {
             auto& tab = active_tab();
             tab.view().reset_zoom();
-            update_zoom_menu_text();
+            update_displayed_zoom_level();
         },
         this));
     view_menu.add_separator();
@@ -796,11 +796,12 @@ ErrorOr<void> BrowserWindow::take_screenshot(ScreenshotType type)
     return {};
 }
 
-void BrowserWindow::update_zoom_menu_text()
+void BrowserWindow::update_displayed_zoom_level()
 {
     VERIFY(m_zoom_menu);
     auto zoom_level_text = DeprecatedString::formatted("&Zoom ({}%)", round_to<int>(active_tab().view().zoom_level() * 100));
     m_zoom_menu->set_name(zoom_level_text);
+    active_tab().update_reset_zoom_button();
 }
 
 }

Userland/Applications/Browser/BrowserWindow.h

@@ -62,7 +62,7 @@ private:
 
     virtual void event(Core::Event&) override;
 
-    void update_zoom_menu_text();
+    void update_displayed_zoom_level();
 
     enum class ScreenshotType {
         Visible,

Userland/Applications/Browser/Tab.cpp

@@ -201,6 +201,15 @@ Tab::Tab(BrowserWindow& window)
         },
         this);
 
+    m_reset_zoom_button = toolbar.add<GUI::Button>();
+    m_reset_zoom_button->on_click = [&](auto) {
+        view().reset_zoom();
+        update_reset_zoom_button();
+    };
+    m_reset_zoom_button->set_button_style(Gfx::ButtonStyle::Coolbar);
+    m_reset_zoom_button->set_visible(false);
+    m_reset_zoom_button->set_preferred_width(GUI::SpecialDimension::Shrink);
+
     m_bookmark_button = toolbar.add<GUI::Button>();
     m_bookmark_button->set_action(bookmark_action);
     m_bookmark_button->set_button_style(Gfx::ButtonStyle::Coolbar);
@@ -514,6 +523,17 @@ Tab::Tab(BrowserWindow& window)
     };
 }
 
+void Tab::update_reset_zoom_button()
+{
+    auto zoom_level = view().zoom_level();
+    if (zoom_level != 1.0f) {
+        m_reset_zoom_button->set_text(MUST(String::formatted("{}%", round_to<int>(zoom_level * 100))));
+        m_reset_zoom_button->set_visible(true);
+    } else {
+        m_reset_zoom_button->set_visible(false);
+    }
+}
+
 Optional<URL> Tab::url_from_location_bar(MayAppendTLD may_append_tld)
 {
     if (m_location_box->text().starts_with('?') && g_search_engine.is_empty()) {

Userland/Applications/Browser/Tab.h

@@ -90,6 +90,8 @@ public:
     void show_storage_inspector();
     void show_history_inspector();
 
+    void update_reset_zoom_button();
+
     DeprecatedString const& title() const { return m_title; }
     Gfx::Bitmap const* icon() const { return m_icon; }
 
@@ -124,6 +126,7 @@ private:
     RefPtr<WebView::OutOfProcessWebView> m_web_content_view;
 
     RefPtr<GUI::UrlBox> m_location_box;
+    RefPtr<GUI::Button> m_reset_zoom_button;
     RefPtr<GUI::Button> m_bookmark_button;
     RefPtr<InspectorWidget> m_dom_inspector_widget;
     RefPtr<ConsoleWidget> m_console_widget;