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ladybird/Userland/Libraries/LibGUI/ConnectionToWindowServer.cpp
circl eeeaf410fb WindowServer+LibGUI: Expose raw scroll wheel values to applications 
This is useful, for instance, in games in which you can switch held
items using the scroll wheel. In order to implement this, they
previously would have to either add a hard-coded division by 4, or look
up your mouse settings to adjust correctly.

This commit adds an MouseEvent.wheel_raw_delta_x() and
MouseEvent.wheel_raw_delta_y().
2022-03-27 01:11:27 +01:00

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15 KiB
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/*
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/StringBuilder.h>
#include <LibCore/EventLoop.h>
#include <LibCore/MimeData.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/CommandPalette.h>
#include <LibGUI/ConnectionToWindowServer.h>
#include <LibGUI/Desktop.h>
#include <LibGUI/DisplayLink.h>
#include <LibGUI/DragOperation.h>
#include <LibGUI/EmojiInputDialog.h>
#include <LibGUI/Event.h>
#include <LibGUI/Menu.h>
#include <LibGUI/MouseTracker.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <LibGfx/SystemTheme.h>
namespace GUI {
ConnectionToWindowServer& ConnectionToWindowServer::the()
{
static RefPtr<ConnectionToWindowServer> s_connection = nullptr;
if (!s_connection)
s_connection = ConnectionToWindowServer::try_create().release_value_but_fixme_should_propagate_errors();
return *s_connection;
}
static void set_system_theme_from_anonymous_buffer(Core::AnonymousBuffer buffer)
{
Gfx::set_system_theme(buffer);
Application::the()->set_system_palette(buffer);
}
ConnectionToWindowServer::ConnectionToWindowServer(NonnullOwnPtr<Core::Stream::LocalSocket> socket)
: IPC::ConnectionToServer<WindowClientEndpoint, WindowServerEndpoint>(*this, move(socket))
{
// NOTE: WindowServer automatically sends a "fast_greet" message to us when we connect.
// All we have to do is wait for it to arrive. This avoids a round-trip during application startup.
auto message = wait_for_specific_message<Messages::WindowClient::FastGreet>();
set_system_theme_from_anonymous_buffer(message->theme_buffer());
Desktop::the().did_receive_screen_rects({}, message->screen_rects(), message->main_screen_index(), message->workspace_rows(), message->workspace_columns());
Gfx::FontDatabase::set_default_font_query(message->default_font_query());
Gfx::FontDatabase::set_fixed_width_font_query(message->fixed_width_font_query());
m_client_id = message->client_id();
}
void ConnectionToWindowServer::fast_greet(Vector<Gfx::IntRect> const&, u32, u32, u32, Core::AnonymousBuffer const&, String const&, String const&, i32)
{
// NOTE: This message is handled in the constructor.
}
void ConnectionToWindowServer::update_system_theme(Core::AnonymousBuffer const& theme_buffer)
{
set_system_theme_from_anonymous_buffer(theme_buffer);
Window::update_all_windows({});
Window::for_each_window({}, [](auto& window) {
Core::EventLoop::current().post_event(window, make<ThemeChangeEvent>());
});
}
void ConnectionToWindowServer::update_system_fonts(const String& default_font_query, const String& fixed_width_font_query)
{
Gfx::FontDatabase::set_default_font_query(default_font_query);
Gfx::FontDatabase::set_fixed_width_font_query(fixed_width_font_query);
Window::update_all_windows({});
Window::for_each_window({}, [](auto& window) {
Core::EventLoop::current().post_event(window, make<FontsChangeEvent>());
});
}
void ConnectionToWindowServer::paint(i32 window_id, Gfx::IntSize const& window_size, Vector<Gfx::IntRect> const& rects)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<MultiPaintEvent>(rects, window_size));
}
void ConnectionToWindowServer::window_resized(i32 window_id, Gfx::IntRect const& new_rect)
{
if (auto* window = Window::from_window_id(window_id)) {
Core::EventLoop::current().post_event(*window, make<ResizeEvent>(new_rect.size()));
}
}
void ConnectionToWindowServer::window_activated(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowBecameActive));
}
void ConnectionToWindowServer::window_deactivated(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowBecameInactive));
}
void ConnectionToWindowServer::window_input_entered(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowInputEntered));
}
void ConnectionToWindowServer::window_input_left(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowInputLeft));
}
void ConnectionToWindowServer::window_close_request(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowCloseRequest));
}
void ConnectionToWindowServer::window_entered(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowEntered));
}
void ConnectionToWindowServer::window_left(i32 window_id)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowLeft));
}
static Action* action_for_key_event(Window& window, KeyEvent const& event)
{
if (event.key() == KeyCode::Key_Invalid)
return nullptr;
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, "Looking up action for {}", event.to_string());
for (auto* widget = window.focused_widget(); widget; widget = widget->parent_widget()) {
if (auto* action = widget->action_for_key_event(event)) {
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Focused widget {} gave action: {}", *widget, action);
return action;
}
}
if (auto* action = window.action_for_key_event(event)) {
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Asked window {}, got action: {}", window, action);
return action;
}
// NOTE: Application-global shortcuts are ignored while a modal window is up.
if (!window.is_modal()) {
if (auto* action = Application::the()->action_for_key_event(event)) {
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Asked application, got action: {}", action);
return action;
}
}
return nullptr;
}
void ConnectionToWindowServer::key_down(i32 window_id, u32 code_point, u32 key, u32 modifiers, u32 scancode)
{
auto* window = Window::from_window_id(window_id);
if (!window)
return;
auto key_event = make<KeyEvent>(Event::KeyDown, (KeyCode)key, modifiers, code_point, scancode);
if (auto* action = action_for_key_event(*window, *key_event)) {
if (action->is_enabled()) {
action->flash_menubar_menu(*window);
action->activate();
return;
}
if (action->swallow_key_event_when_disabled())
return;
}
bool focused_widget_accepts_emoji_input = window->focused_widget() && window->focused_widget()->accepts_emoji_input();
if (focused_widget_accepts_emoji_input && (modifiers == (Mod_Ctrl | Mod_Alt)) && key == Key_Space) {
auto emoji_input_dialog = EmojiInputDialog::construct(window);
if (emoji_input_dialog->exec() != EmojiInputDialog::ExecOK)
return;
key_event->m_key = Key_Invalid;
key_event->m_modifiers = 0;
Utf8View m_utf8_view(emoji_input_dialog->selected_emoji_text());
u32 emoji_code_point = *m_utf8_view.begin();
key_event->m_code_point = emoji_code_point;
}
bool accepts_command_palette = true;
if (window->focused_widget())
accepts_command_palette = window->focused_widget()->accepts_command_palette();
// FIXME: This shortcut should be configurable.
if (accepts_command_palette && !m_in_command_palette && modifiers == (Mod_Ctrl | Mod_Shift) && key == Key_A) {
auto command_palette = CommandPalette::construct(*window);
TemporaryChange change { m_in_command_palette, true };
if (command_palette->exec() != GUI::Dialog::ExecOK)
return;
auto* action = command_palette->selected_action();
VERIFY(action);
action->flash_menubar_menu(*window);
action->activate();
return;
}
Core::EventLoop::current().post_event(*window, move(key_event));
}
void ConnectionToWindowServer::key_up(i32 window_id, u32 code_point, u32 key, u32 modifiers, u32 scancode)
{
auto* window = Window::from_window_id(window_id);
if (!window)
return;
auto key_event = make<KeyEvent>(Event::KeyUp, (KeyCode)key, modifiers, code_point, scancode);
Core::EventLoop::current().post_event(*window, move(key_event));
}
static MouseButton to_mouse_button(u32 button)
{
switch (button) {
case 0:
return MouseButton::None;
case 1:
return MouseButton::Primary;
case 2:
return MouseButton::Secondary;
case 4:
return MouseButton::Middle;
case 8:
return MouseButton::Backward;
case 16:
return MouseButton::Forward;
default:
VERIFY_NOT_REACHED();
break;
}
}
void ConnectionToWindowServer::mouse_down(i32 window_id, Gfx::IntPoint const& mouse_position, u32 button, u32 buttons, u32 modifiers, i32 wheel_delta_x, i32 wheel_delta_y, i32 wheel_raw_delta_x, i32 wheel_raw_delta_y)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseDown, mouse_position, buttons, to_mouse_button(button), modifiers, wheel_delta_x, wheel_delta_y, wheel_raw_delta_x, wheel_raw_delta_y));
}
void ConnectionToWindowServer::mouse_up(i32 window_id, Gfx::IntPoint const& mouse_position, u32 button, u32 buttons, u32 modifiers, i32 wheel_delta_x, i32 wheel_delta_y, i32 wheel_raw_delta_x, i32 wheel_raw_delta_y)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseUp, mouse_position, buttons, to_mouse_button(button), modifiers, wheel_delta_x, wheel_delta_y, wheel_raw_delta_x, wheel_raw_delta_y));
}
void ConnectionToWindowServer::mouse_move(i32 window_id, Gfx::IntPoint const& mouse_position, u32 button, u32 buttons, u32 modifiers, i32 wheel_delta_x, i32 wheel_delta_y, i32 wheel_raw_delta_x, i32 wheel_raw_delta_y, bool is_drag, Vector<String> const& mime_types)
{
if (auto* window = Window::from_window_id(window_id)) {
if (is_drag)
Core::EventLoop::current().post_event(*window, make<DragEvent>(Event::DragMove, mouse_position, mime_types));
else
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseMove, mouse_position, buttons, to_mouse_button(button), modifiers, wheel_delta_x, wheel_delta_y, wheel_raw_delta_x, wheel_raw_delta_y));
}
}
void ConnectionToWindowServer::mouse_double_click(i32 window_id, Gfx::IntPoint const& mouse_position, u32 button, u32 buttons, u32 modifiers, i32 wheel_delta_x, i32 wheel_delta_y, i32 wheel_raw_delta_x, i32 wheel_raw_delta_y)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseDoubleClick, mouse_position, buttons, to_mouse_button(button), modifiers, wheel_delta_x, wheel_delta_y, wheel_raw_delta_x, wheel_raw_delta_y));
}
void ConnectionToWindowServer::mouse_wheel(i32 window_id, Gfx::IntPoint const& mouse_position, u32 button, u32 buttons, u32 modifiers, i32 wheel_delta_x, i32 wheel_delta_y, i32 wheel_raw_delta_x, i32 wheel_raw_delta_y)
{
if (auto* window = Window::from_window_id(window_id))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseWheel, mouse_position, buttons, to_mouse_button(button), modifiers, wheel_delta_x, wheel_delta_y, wheel_raw_delta_x, wheel_raw_delta_y));
}
void ConnectionToWindowServer::menu_visibility_did_change(i32 menu_id, bool visible)
{
auto* menu = Menu::from_menu_id(menu_id);
if (!menu) {
dbgln("EventLoop received visibility change event for invalid menu ID {}", menu_id);
return;
}
menu->visibility_did_change({}, visible);
}
void ConnectionToWindowServer::menu_item_activated(i32 menu_id, u32 identifier)
{
auto* menu = Menu::from_menu_id(menu_id);
if (!menu) {
dbgln("EventLoop received event for invalid menu ID {}", menu_id);
return;
}
if (auto* action = menu->action_at(identifier))
action->activate(menu);
}
void ConnectionToWindowServer::menu_item_entered(i32 menu_id, u32 identifier)
{
auto* menu = Menu::from_menu_id(menu_id);
if (!menu) {
dbgln("ConnectionToWindowServer received MenuItemEntered for invalid menu ID {}", menu_id);
return;
}
auto* action = menu->action_at(identifier);
if (!action)
return;
auto* app = Application::the();
if (!app)
return;
Core::EventLoop::current().post_event(*app, make<ActionEvent>(GUI::Event::ActionEnter, *action));
}
void ConnectionToWindowServer::menu_item_left(i32 menu_id, u32 identifier)
{
auto* menu = Menu::from_menu_id(menu_id);
if (!menu) {
dbgln("ConnectionToWindowServer received MenuItemLeft for invalid menu ID {}", menu_id);
return;
}
auto* action = menu->action_at(identifier);
if (!action)
return;
auto* app = Application::the();
if (!app)
return;
Core::EventLoop::current().post_event(*app, make<ActionEvent>(GUI::Event::ActionLeave, *action));
}
void ConnectionToWindowServer::screen_rects_changed(Vector<Gfx::IntRect> const& rects, u32 main_screen_index, u32 workspace_rows, u32 workspace_columns)
{
Desktop::the().did_receive_screen_rects({}, rects, main_screen_index, workspace_rows, workspace_columns);
Window::for_each_window({}, [&](auto& window) {
Core::EventLoop::current().post_event(window, make<ScreenRectsChangeEvent>(rects, main_screen_index));
});
}
void ConnectionToWindowServer::applet_area_rect_changed(Gfx::IntRect const& rect)
{
Window::for_each_window({}, [&](auto& window) {
Core::EventLoop::current().post_event(window, make<AppletAreaRectChangeEvent>(rect));
});
}
void ConnectionToWindowServer::set_wallpaper_finished(bool)
{
// This is handled manually by Desktop::set_wallpaper().
}
void ConnectionToWindowServer::drag_dropped(i32 window_id, Gfx::IntPoint const& mouse_position, String const& text, HashMap<String, ByteBuffer> const& mime_data)
{
if (auto* window = Window::from_window_id(window_id)) {
auto mime_data_obj = Core::MimeData::construct(mime_data);
Core::EventLoop::current().post_event(*window, make<DropEvent>(mouse_position, text, mime_data_obj));
}
}
void ConnectionToWindowServer::drag_accepted()
{
DragOperation::notify_accepted({});
}
void ConnectionToWindowServer::drag_cancelled()
{
DragOperation::notify_cancelled({});
Application::the()->notify_drag_cancelled({});
}
void ConnectionToWindowServer::window_state_changed(i32 window_id, bool minimized, bool occluded)
{
if (auto* window = Window::from_window_id(window_id))
window->notify_state_changed({}, minimized, occluded);
}
void ConnectionToWindowServer::display_link_notification()
{
if (m_display_link_notification_pending)
return;
m_display_link_notification_pending = true;
deferred_invoke([this] {
DisplayLink::notify({});
m_display_link_notification_pending = false;
});
}
void ConnectionToWindowServer::track_mouse_move(Gfx::IntPoint const& mouse_position)
{
MouseTracker::track_mouse_move({}, mouse_position);
}
void ConnectionToWindowServer::ping()
{
async_pong();
}
}
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