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Diffstat (limited to 'Userland/Libraries/LibGUI/Menu.cpp')
| -rw-r--r-- | Userland/Libraries/LibGUI/Menu.cpp | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/Userland/Libraries/LibGUI/Menu.cpp b/Userland/Libraries/LibGUI/Menu.cpp new file mode 100644 index 0000000000..47e284312a --- /dev/null +++ b/Userland/Libraries/LibGUI/Menu.cpp @@ -0,0 +1,191 @@ +/* + * 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. + */ + +#include <AK/HashMap.h> +#include <AK/SharedBuffer.h> +#include <LibGUI/Action.h> +#include <LibGUI/ActionGroup.h> +#include <LibGUI/Menu.h> +#include <LibGUI/MenuItem.h> +#include <LibGUI/WindowServerConnection.h> +#include <LibGfx/Bitmap.h> + +//#define MENU_DEBUG + +namespace GUI { + +static HashMap<int, Menu*>& all_menus() +{ + static HashMap<int, Menu*>* map; + if (!map) + map = new HashMap<int, Menu*>(); + return *map; +} + +Menu* Menu::from_menu_id(int menu_id) +{ + auto it = all_menus().find(menu_id); + if (it == all_menus().end()) + return nullptr; + return (*it).value; +} + +Menu::Menu(const StringView& name) + : m_name(name) +{ +} + +Menu::~Menu() +{ + unrealize_menu(); +} + +void Menu::set_icon(const Gfx::Bitmap* icon) +{ + m_icon = icon; +} + +void Menu::add_action(NonnullRefPtr<Action> action) +{ + m_items.append(make<MenuItem>(m_menu_id, move(action))); +#ifdef GMENU_DEBUG + dbgln("GUI::Menu::add_action(): MenuItem Menu ID: {}", m_menu_id); +#endif +} + +Menu& Menu::add_submenu(const String& name) +{ + auto submenu = Menu::construct(name); + m_items.append(make<MenuItem>(m_menu_id, submenu)); + return submenu; +} + +void Menu::add_separator() +{ + m_items.append(make<MenuItem>(m_menu_id, MenuItem::Type::Separator)); +} + +void Menu::realize_if_needed(const RefPtr<Action>& default_action) +{ + if (m_menu_id == -1 || m_last_default_action.ptr() != default_action) + realize_menu(default_action); +} + +void Menu::popup(const Gfx::IntPoint& screen_position, const RefPtr<Action>& default_action) +{ + realize_if_needed(default_action); + WindowServerConnection::the().post_message(Messages::WindowServer::PopupMenu(m_menu_id, screen_position)); +} + +void Menu::dismiss() +{ + if (m_menu_id == -1) + return; + WindowServerConnection::the().post_message(Messages::WindowServer::DismissMenu(m_menu_id)); +} + +template<typename IconContainerType> +static int ensure_realized_icon(IconContainerType& container) +{ + int icon_buffer_id = -1; + if (container.icon()) { + ASSERT(container.icon()->format() == Gfx::BitmapFormat::RGBA32); + ASSERT(container.icon()->size() == Gfx::IntSize(16, 16)); + if (container.icon()->shbuf_id() == -1) { + auto shared_buffer = SharedBuffer::create_with_size(container.icon()->size_in_bytes()); + ASSERT(shared_buffer); + auto shared_icon = Gfx::Bitmap::create_with_shared_buffer(Gfx::BitmapFormat::RGBA32, *shared_buffer, container.icon()->size()); + memcpy(shared_buffer->template data<u8>(), container.icon()->scanline_u8(0), container.icon()->size_in_bytes()); + shared_buffer->seal(); + shared_buffer->share_with(WindowServerConnection::the().server_pid()); + container.set_icon(shared_icon); + } + icon_buffer_id = container.icon()->shbuf_id(); + } + return icon_buffer_id; +} + +int Menu::realize_menu(RefPtr<Action> default_action) +{ + unrealize_menu(); + m_menu_id = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateMenu>(m_name)->menu_id(); + +#ifdef MENU_DEBUG + dbgln("GUI::Menu::realize_menu(): New menu ID: {}", m_menu_id); +#endif + ASSERT(m_menu_id > 0); + for (size_t i = 0; i < m_items.size(); ++i) { + auto& item = m_items[i]; + item.set_menu_id({}, m_menu_id); + item.set_identifier({}, i); + if (item.type() == MenuItem::Type::Separator) { + WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuSeparator>(m_menu_id); + continue; + } + if (item.type() == MenuItem::Type::Submenu) { + auto& submenu = *item.submenu(); + submenu.realize_if_needed(default_action); + int icon_buffer_id = ensure_realized_icon(submenu); + WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuItem>(m_menu_id, i, submenu.menu_id(), submenu.name(), true, false, false, false, "", icon_buffer_id, false); + continue; + } + if (item.type() == MenuItem::Type::Action) { + auto& action = *item.action(); + int icon_buffer_id = ensure_realized_icon(action); + auto shortcut_text = action.shortcut().is_valid() ? action.shortcut().to_string() : String(); + bool exclusive = action.group() && action.group()->is_exclusive() && action.is_checkable(); + bool is_default = (default_action.ptr() == &action); + WindowServerConnection::the().send_sync<Messages::WindowServer::AddMenuItem>(m_menu_id, i, -1, action.text(), action.is_enabled(), action.is_checkable(), action.is_checkable() ? action.is_checked() : false, is_default, shortcut_text, icon_buffer_id, exclusive); + } + } + all_menus().set(m_menu_id, this); + m_last_default_action = default_action; + return m_menu_id; +} + +void Menu::unrealize_menu() +{ + if (m_menu_id == -1) + return; + all_menus().remove(m_menu_id); + WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyMenu>(m_menu_id); + m_menu_id = -1; +} + +void Menu::realize_menu_if_needed() +{ + if (menu_id() == -1) + realize_menu(); +} + +Action* Menu::action_at(size_t index) +{ + if (index >= m_items.size()) + return nullptr; + return m_items[index].action(); +} + +} |