init multi-window implementation

src/Entity/Browser/Container/Tab.php

@@ -0,0 +1,97 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser\Container;
+
+class Tab
+{
+    public \GtkNotebook $gtk;
+
+    // Dependencies
+    public \Yggverse\Yoda\Entity\Browser\Container $container;
+
+    // Defaults
+    private bool $_reorderable = true;
+    private bool $_scrollable  = true;
+
+    public function __construct(
+        \Yggverse\Yoda\Entity\Browser\Container $container
+    ) {
+        // Init dependency
+        $this->container = $container;
+
+        // Init container
+        $this->gtk = new \GtkNotebook;
+
+        $this->gtk->set_scrollable(
+            $this->_scrollable
+        );
+
+        // Init previous session @TODO
+        $this->append();
+        $this->append();
+
+        // Connect events
+        $this->gtk->connect(
+            'switch-page',
+            function (
+                \GtkNotebook $entity,
+                \GtkWidget $child,
+                int $position
+            ) {
+                $this->container->browser->header->setTitle(
+                    $entity->get_tab_label(
+                        $child
+                    )->get_text()
+                );
+            }
+        );
+    }
+
+    public function append(
+        ?string $request = null,
+        bool $focus = true
+    ): void
+    {
+        $page = new \Yggverse\Yoda\Entity\Browser\Container\Tab\Page(
+            $this
+        );
+
+        if ($request)
+        {
+            $page->navbar->request->setValue(
+                $request
+            );
+
+            $page->content->update();
+        }
+
+        $this->gtk->append_page(
+            $page->gtk,
+            $page->title->gtk
+        );
+
+        $this->gtk->set_tab_reorderable(
+            $page->gtk,
+            $this->_reorderable
+        );
+
+        if ($focus)
+        {
+            // Focus on appended tab
+            $this->gtk->set_current_page(
+                $this->gtk->page_num(
+                    $page->gtk
+                )
+            );
+
+            // Update application title
+            $this->container->browser->header->setTitle(
+                $page->title->gtk->get_text()
+            );
+        }
+
+        $this->gtk->show_all();
+    }
+}