Set up WebEditorPlugin to hide / show the web editor tab in a way that feels right. The tab itself is empty though at the moment.

modules/web/editor/web_editor_plugin.cpp

@@ -27,7 +27,14 @@ SOFTWARE.
 
 #include "editor/editor_node.h"
 
-void WebEditorPlugin::make_visible(const bool visible) {
+void WebEditorPlugin::make_visible(bool visible) {
+	if (visible) {
+		if (is_inside_tree()) {
+			_scene_has_webnode = true;
+			editor->editor_set_visible_by_name("Web", true);
+		}
+	}
+
 	window->set_visible(visible);
 }
 
@@ -44,26 +51,94 @@ bool WebEditorPlugin::has_main_screen() const {
 }
 
 void WebEditorPlugin::edit(Object *p_object) {
-	//WebNode *wn = Object::cast_to<WebNode>(p_object);
+	WebNode *wn = Object::cast_to<WebNode>(p_object);
 
-	//if (wn) {
+	if (wn) {
 		//	window->set_node(wn);
-	//}
+
+		get_editor_interface()->set_main_screen_editor("Web");
+	}
 }
 
 bool WebEditorPlugin::handles(Object *p_object) const {
 	return p_object->is_class("WebNode");
 }
 
+void WebEditorPlugin::edited_scene_changed() {
+	Node *edited_scene = editor->get_edited_scene();
+
+	_scene_has_webnode = scene_has_webnode(edited_scene);
+	editor->editor_set_visible_by_name("Web", _scene_has_webnode);
+}
+
+bool WebEditorPlugin::scene_has_webnode(Node *p_node) {
+	if (!p_node) {
+		return false;
+	}
+
+	if (Object::cast_to<WebNode>(p_node)) {
+		return true;
+	}
+
+	for (int i = 0; i < p_node->get_child_count(); ++i) {
+		Node *n = p_node->get_child(i);
+
+		if (scene_has_webnode(n)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+bool WebEditorPlugin::scene_has_webnode_skip(Node *p_node, Node *skip) {
+	if (!p_node) {
+		return false;
+	}
+
+	if (p_node == skip) {
+		return false;
+	}
+
+	if (Object::cast_to<WebNode>(p_node)) {
+		return true;
+	}
+
+	for (int i = 0; i < p_node->get_child_count(); ++i) {
+		Node *n = p_node->get_child(i);
+
+		if (scene_has_webnode_skip(n, skip)) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void WebEditorPlugin::on_node_removed(Node *p_node) {
+	if (!_scene_has_webnode) {
+		return;
+	}
+
+	if (Object::cast_to<WebNode>(p_node)) {
+		if (!scene_has_webnode_skip(editor->get_edited_scene(), p_node)) {
+			editor->editor_set_visible_by_name("Web", false);
+			_scene_has_webnode = false;
+		}
+	}
+}
+
 WebEditorPlugin::WebEditorPlugin(EditorNode *p_node) {
 	editor = p_node;
 
 	window = memnew(WebEditor);
 
-	get_editor_interface()->get_editor_viewport()->add_child(window);
+	editor->get_viewport()->add_child(window);
 	_icon = get_editor_interface()->get_base_control()->get_theme_icon("WebNodeEditor", "EditorIcons");
 
 	make_visible(false);
+
+	_scene_has_webnode = false;
 }
 
 WebEditorPlugin::~WebEditorPlugin() {
@@ -71,12 +146,16 @@ WebEditorPlugin::~WebEditorPlugin() {
 
 void WebEditorPlugin::_notification(int p_what) {
 	switch (p_what) {
-		case NOTIFICATION_ENTER_TREE: {
+		case NOTIFICATION_POST_ENTER_TREE: {
-			get_editor_interface()->set_main_screen_editor_tab_button_visible("Web", false);
+			editor->editor_set_visible_by_name("Web", false);
+			get_tree()->connect("node_removed", this, "on_node_removed");
+		} break;
+		case NOTIFICATION_EXIT_TREE: {
+			get_tree()->disconnect("node_removed", this, "on_node_removed");
 		} break;
 	}
 }
 
 void WebEditorPlugin::_bind_methods() {
-	//ClassDB::bind_method(D_METHOD(""), &WebEditorPlugin::);
+	ClassDB::bind_method(D_METHOD("on_node_removed", "node"), &WebEditorPlugin::on_node_removed);
 }

modules/web/editor/web_editor_plugin.h

@@ -34,12 +34,16 @@ class WebEditorPlugin : public EditorPlugin {
 	GDCLASS(WebEditorPlugin, EditorPlugin);
 
 public:
-	void make_visible(const bool visible);
+	void make_visible(bool visible);
 	const Ref<Texture> get_icon() const;
 	bool has_main_screen() const;
 	String get_name() const;
 	void edit(Object *p_object);
 	bool handles(Object *p_object) const;
+	void edited_scene_changed();
+
+	bool scene_has_webnode(Node *p_node);
+	bool scene_has_webnode_skip(Node *p_node, Node *skip);
 
 	WebEditorPlugin(EditorNode *p_node);
 	~WebEditorPlugin();
@@ -49,11 +53,14 @@ public:
 	WebEditor *window;
 
 protected:
+	void on_node_removed(Node *p_child);
+
 	void _notification(int p_what);
 
 	static void _bind_methods();
 
 	Ref<Texture> _icon;
+	bool _scene_has_webnode;
 };
 
 #endif