Services: Renamed from Servers

It didn't feel right to have a "DHCPClient" in a "Servers" directory.
Rename this to Services to better reflect the type of programs we'll
be putting in there.

Services/WindowServer/Menu.h

@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/NonnullOwnPtrVector.h>
+#include <AK/String.h>
+#include <AK/WeakPtr.h>
+#include <LibCore/Object.h>
+#include <LibGfx/Font.h>
+#include <LibGfx/Forward.h>
+#include <LibGfx/Rect.h>
+#include <WindowServer/Cursor.h>
+#include <WindowServer/MenuItem.h>
+#include <WindowServer/Window.h>
+
+namespace WindowServer {
+
+class ClientConnection;
+class MenuBar;
+class Event;
+
+class Menu final : public Core::Object {
+    C_OBJECT(Menu)
+public:
+    Menu(ClientConnection*, int menu_id, const String& name);
+    virtual ~Menu() override;
+
+    ClientConnection* client() { return m_client; }
+    const ClientConnection* client() const { return m_client; }
+    int menu_id() const { return m_menu_id; }
+
+    MenuBar* menubar() { return m_menubar; }
+    const MenuBar* menubar() const { return m_menubar; }
+    void set_menubar(MenuBar* menubar) { m_menubar = menubar; }
+
+    bool is_empty() const { return m_items.is_empty(); }
+    int item_count() const { return m_items.size(); }
+    const MenuItem& item(int index) const { return m_items.at(index); }
+    MenuItem& item(int index) { return m_items.at(index); }
+
+    void add_item(NonnullOwnPtr<MenuItem>&& item) { m_items.append(move(item)); }
+
+    String name() const { return m_name; }
+
+    template<typename Callback>
+    void for_each_item(Callback callback) const
+    {
+        for (auto& item : m_items)
+            callback(item);
+    }
+
+    Gfx::Rect text_rect_in_menubar() const { return m_text_rect_in_menubar; }
+    void set_text_rect_in_menubar(const Gfx::Rect& rect) { m_text_rect_in_menubar = rect; }
+
+    Gfx::Rect rect_in_menubar() const { return m_rect_in_menubar; }
+    void set_rect_in_menubar(const Gfx::Rect& rect) { m_rect_in_menubar = rect; }
+
+    Window* menu_window() { return m_menu_window.ptr(); }
+    Window& ensure_menu_window();
+
+    Window* window_menu_of() { return m_window_menu_of; }
+    void set_window_menu_of(Window& window) { m_window_menu_of = window.make_weak_ptr(); }
+    bool is_window_menu_open() { return m_is_window_menu_open; }
+    void set_window_menu_open(bool is_open) { m_is_window_menu_open = is_open; }
+
+    int content_width() const;
+
+    int item_height() const { return 20; }
+    int frame_thickness() const { return 3; }
+    int horizontal_padding() const { return left_padding() + right_padding(); }
+    int left_padding() const { return 14; }
+    int right_padding() const { return 14; }
+
+    void draw();
+    const Gfx::Font& font() const;
+    const Gfx::Font& title_font() const;
+    void set_title_font(const Gfx::Font& font);
+
+    MenuItem* item_with_identifier(unsigned);
+    void redraw();
+
+    MenuItem* hovered_item() const;
+    void clear_hovered_item();
+
+    Function<void(MenuItem&)> on_item_activation;
+
+    void close();
+
+    void popup(const Gfx::Point&, bool is_submenu = false);
+
+    bool is_menu_ancestor_of(const Menu&) const;
+
+    void redraw_if_theme_changed();
+
+    bool is_scrollable() const { return m_scrollable; }
+    int scroll_offset() const { return m_scroll_offset; }
+
+private:
+    virtual void event(Core::Event&) override;
+
+    RefPtr<Gfx::Font> m_title_font { &Gfx::Font::default_font() };
+
+    void handle_mouse_move_event(const MouseEvent&);
+    int visible_item_count() const;
+
+    int item_index_at(const Gfx::Point&);
+    int padding_between_text_and_shortcut() const { return 50; }
+    void did_activate(MenuItem&);
+    void open_hovered_item();
+    void update_for_new_hovered_item();
+    void descend_into_submenu_at_hovered_item();
+
+    ClientConnection* m_client { nullptr };
+    int m_menu_id { 0 };
+    String m_name;
+    Gfx::Rect m_rect_in_menubar;
+    Gfx::Rect m_text_rect_in_menubar;
+    MenuBar* m_menubar { nullptr };
+    NonnullOwnPtrVector<MenuItem> m_items;
+    RefPtr<Window> m_menu_window;
+
+    WeakPtr<Window> m_window_menu_of;
+    bool m_is_window_menu_open = { false };
+    Gfx::Point m_last_position_in_hover;
+    int m_theme_index_at_last_paint { -1 };
+    int m_hovered_item_index { -1 };
+    bool m_in_submenu { false };
+
+    bool m_scrollable { false };
+    int m_scroll_offset { 0 };
+    int m_max_scroll_offset { 0 };
+};
+
+}