Browser: Add "New tab" action (Ctrl+T) :^)

This also introduces a WindowActions collection of actions that are not
specific to the currently open tab, but nevertheless part of its menus.

Applications/Browser/Makefile

@@ -2,6 +2,7 @@ OBJS = \
     BookmarksBarWidget.o \
     InspectorWidget.o \
     Tab.o \
+    WindowActions.o \
     main.o
 
 PROGRAM = Browser

Applications/Browser/Tab.cpp

@@ -26,6 +26,7 @@
 
 #include "Tab.h"
 #include "BookmarksBarWidget.h"
+#include "WindowActions.h"
 #include "History.h"
 #include "InspectorWidget.h"
 #include <LibGUI/AboutDialog.h>
@@ -176,6 +177,8 @@ Tab::Tab()
     m_menubar = GUI::MenuBar::construct();
 
     auto& app_menu = m_menubar->add_menu("Browser");
+    app_menu.add_action(WindowActions::the().create_new_tab_action());
+
     app_menu.add_action(GUI::Action::create("Reload", { Mod_None, Key_F5 }, Gfx::Bitmap::load_from_file("/res/icons/16x16/reload.png"), [this](auto&) {
         TemporaryChange<bool> change(m_should_push_loads_to_history, false);
         m_html_widget->reload();

Applications/Browser/WindowActions.cpp

@@ -0,0 +1,26 @@
+#include "WindowActions.h"
+#include <LibGUI/Window.h>
+
+namespace Browser {
+
+static WindowActions* s_the;
+
+WindowActions& WindowActions::the()
+{
+    ASSERT(s_the);
+    return *s_the;
+}
+
+WindowActions::WindowActions(GUI::Window& window)
+{
+    ASSERT(!s_the);
+    s_the = this;
+    m_create_new_tab_action = GUI::Action::create(
+        "New tab", { Mod_Ctrl, Key_T }, [this](auto&) {
+            if (on_create_new_tab)
+                on_create_new_tab();
+        },
+        &window);
+}
+
+}

Applications/Browser/WindowActions.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <LibGUI/Action.h>
+
+namespace Browser {
+
+class WindowActions {
+public:
+    static WindowActions& the();
+
+    WindowActions(GUI::Window&);
+
+    Function<void()> on_create_new_tab;
+
+    GUI::Action& create_new_tab_action() { return *m_create_new_tab_action; }
+
+private:
+    RefPtr<GUI::Action> m_create_new_tab_action;
+};
+
+}

Applications/Browser/main.cpp

@@ -24,6 +24,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "WindowActions.h"
 #include "InspectorWidget.h"
 #include "Tab.h"
 #include <LibCore/File.h>
@@ -88,7 +89,9 @@ int main(int argc, char** argv)
         tab.did_become_active();
     };
 
-    auto create_new_tab = [&] {
+    Browser::WindowActions window_actions(*window);
+
+    auto create_new_tab = [&](bool activate = true) {
         auto& new_tab = tab_widget.add_tab<Browser::Tab>("New tab");
 
         new_tab.on_title_change = [&](auto title) {
@@ -111,6 +114,13 @@ int main(int argc, char** argv)
         new_tab.load(url_to_load);
 
         dbg() << "Added new tab " << &new_tab << ", loading " << url_to_load;
+
+        if (activate)
+            tab_widget.set_active_widget(&new_tab);
+    };
+
+    window_actions.on_create_new_tab = [&] {
+        create_new_tab();
     };
 
     create_new_tab();