sculpt_manager: query presets

This patch queries the files at config/presets/ in addition to
config/launcher using the existing launcher_query component.

Issue #4731

repos/gems/src/app/sculpt_manager/main.cc

@@ -35,6 +35,7 @@
 #include <model/child_exit_state.h>
 #include <model/file_operation_queue.h>
 #include <model/settings.h>
+#include <model/presets.h>
 #include <view/download_status.h>
 #include <view/popup_dialog.h>
 #include <view/panel_dialog.h>
@@ -368,21 +369,26 @@ struct Sculpt::Main : Input_event_handler,
 		_env, "report -> /runtime/launcher_query/listing" };
 
 	Launchers _launchers { _heap };
+	Presets   _presets   { _heap };
 
-	Signal_handler<Main> _launcher_listing_handler {
-		_env.ep(), *this, &Main::_handle_launcher_listing };
+	Signal_handler<Main> _launcher_and_preset_listing_handler {
+		_env.ep(), *this, &Main::_handle_launcher_and_preset_listing };
 
-	void _handle_launcher_listing()
+	void _handle_launcher_and_preset_listing()
 	{
 		_launcher_listing_rom.update();
 
-		Xml_node listing = _launcher_listing_rom.xml();
-		if (listing.has_sub_node("dir")) {
-			Xml_node dir = listing.sub_node("dir");
+		Xml_node const listing = _launcher_listing_rom.xml();
+		listing.for_each_sub_node("dir", [&] (Xml_node const &dir) {
 
-			/* let 'update_from_xml' iterate over <file> nodes */
-			_launchers.update_from_xml(dir);
-		}
+			Path const dir_path = dir.attribute_value("path", Path());
+
+			if (dir_path == "/launcher")
+				_launchers.update_from_xml(dir); /* iterate over <file> nodes */
+
+			if (dir_path == "/presets")
+				_presets.update_from_xml(dir);   /* iterate over <file> nodes */
+		});
 
 		_popup_menu_view.generate();
 		_deploy._handle_managed_deploy();
@@ -1235,7 +1241,7 @@ struct Sculpt::Main : Input_event_handler,
 		_pci_devices         .sigh(_pci_devices_handler);
 		_window_list         .sigh(_window_list_handler);
 		_decorator_margins   .sigh(_decorator_margins_handler);
-		_launcher_listing_rom.sigh(_launcher_listing_handler);
+		_launcher_listing_rom.sigh(_launcher_and_preset_listing_handler);
 		_blueprint_rom       .sigh(_blueprint_handler);
 		_editor_saved_rom    .sigh(_editor_saved_handler);
 		_clicked_rom         .sigh(_clicked_handler);

repos/gems/src/app/sculpt_manager/model/presets.h

@@ -0,0 +1,121 @@
+/*
+ * \brief  Cached information about available deploy presets
+ * \author Norman Feske
+ * \date   2022-01-11
+ */
+
+/*
+ * Copyright (C) 2023 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU Affero General Public License version 3.
+ */
+
+#ifndef _MODEL__PRESETS_H_
+#define _MODEL__PRESETS_H_
+
+/* Genode includes */
+#include <util/list_model.h>
+#include <util/dictionary.h>
+
+/* local includes */
+#include <types.h>
+
+namespace Sculpt { class Presets; }
+
+
+class Sculpt::Presets : public Noncopyable
+{
+	public:
+
+		struct Info : Noncopyable
+		{
+			using Name = String<64>;
+			using Text = String<128>;
+
+			Name const name;
+			Text const text;
+
+			static Text _info_text(Xml_node const &node)
+			{
+				Text result { };
+				node.with_optional_sub_node("config", [&] (Xml_node const &config) {
+					result = config.attribute_value("info", Text()); });
+				return result;
+			}
+
+			Info(Xml_node const &node)
+			:
+				name(node.attribute_value("name", Path())),
+				text(_info_text(node))
+			{ }
+		};
+
+	private:
+
+		Allocator &_alloc;
+
+		unsigned _count = 0;
+
+		struct Preset;
+
+		using Dict = Dictionary<Preset, Path>;
+
+		struct Preset : Dict::Element, List_model<Preset>::Element
+		{
+			Info const info;
+
+			bool matches(Xml_node const &node) const
+			{
+				return node.attribute_value("name", Path()) == name;
+			}
+
+			static bool type_matches(Xml_node const &node)
+			{
+				return node.has_type("file");
+			}
+
+			Preset(Dict &dict, Xml_node const &node)
+			:
+				Dict::Element(dict, node.attribute_value("name", Path())),
+				info(node)
+			{ }
+		};
+
+		Dict _sorted { };
+
+		List_model<Preset> _presets { };
+
+	public:
+
+		Presets(Allocator &alloc) : _alloc(alloc) { }
+
+		void update_from_xml(Xml_node const &presets)
+		{
+			update_list_model_from_xml(_presets, presets,
+
+				/* create */
+				[&] (Xml_node const &node) -> Preset & {
+					return *new (_alloc) Preset(_sorted, node); },
+
+				/* destroy */
+				[&] (Preset &e) { destroy(_alloc, &e); },
+
+				/* update */
+				[&] (Preset &, Xml_node) { }
+			);
+
+			_count = 0;
+			_presets.for_each([&] (Preset const &) { _count++; });
+		}
+
+		template <typename FN>
+		void for_each(FN const &fn) const
+		{
+			_sorted.for_each([&] (Preset const &preset) { fn(preset.info); });
+		}
+
+		bool available() const { return _count > 0; };
+};
+
+#endif /* _MODEL__PRESETS_H_ */

repos/gems/src/app/sculpt_manager/runtime/launcher_query.cc

@@ -30,6 +30,11 @@ void Sculpt::gen_launcher_query_start_content(Xml_generator &xml)
 			xml.attribute("path", "/launcher");
 			xml.attribute("content", "yes");
 		});
+
+		xml.node("query", [&] () {
+			xml.attribute("path", "/presets");
+			xml.attribute("content", "yes");
+		});
 	});
 
 	xml.node("route", [&] () {