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ladybird/Userland/Libraries/LibGUI/WindowServerConnection.cpp
Linus Groh 5367bbb82c LibGUI: Add ScreenRectChangeEvent and deliver it to windows and widgets 
Having to rely on GUI::Desktop's on_rect_change is quite limiting and a
bit awkward (continuing to use it would mean having to setup the
callback in every application using a webview) - we need a better way of
letting widgets know of a screen rect change automatically.

The specific use case will be IPWV/OOPWV which need to keep track of the
screen rect and notify the WebContent service of any change (which on
its own deliberately can't interact with WindowServer at all).

It'll also be useful for notification windows and the taskbar, which
currently both rely on the GUI::Desktop callback but will now be able to
listen and react to the event themselves.
2021-04-04 00:37:54 +02:00

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/*
* 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/Debug.h>
#include <AK/StringBuilder.h>
#include <LibCore/EventLoop.h>
#include <LibCore/MimeData.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/Clipboard.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/Widget.h>
#include <LibGUI/Window.h>
#include <LibGUI/WindowServerConnection.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Palette.h>
#include <LibGfx/SystemTheme.h>
namespace GUI {
WindowServerConnection& WindowServerConnection::the()
{
static WindowServerConnection* s_connection = nullptr;
if (!s_connection)
s_connection = new WindowServerConnection;
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);
}
void WindowServerConnection::handshake()
{
auto response = send_sync<Messages::WindowServer::Greet>();
set_system_theme_from_anonymous_buffer(response->theme_buffer());
Desktop::the().did_receive_screen_rect({}, response->screen_rect());
}
void WindowServerConnection::handle(const Messages::WindowClient::UpdateSystemTheme& message)
{
set_system_theme_from_anonymous_buffer(message.theme_buffer());
Window::update_all_windows({});
Window::for_each_window({}, [](auto& window) {
Core::EventLoop::current().post_event(window, make<ThemeChangeEvent>());
});
}
void WindowServerConnection::handle(const Messages::WindowClient::Paint& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<MultiPaintEvent>(message.rects(), message.window_size()));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowResized& message)
{
if (auto* window = Window::from_window_id(message.window_id())) {
Core::EventLoop::current().post_event(*window, make<ResizeEvent>(message.new_rect().size()));
}
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowActivated& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowBecameActive));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowDeactivated& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowBecameInactive));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowInputEntered& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowInputEntered));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowInputLeft& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowInputLeft));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowCloseRequest& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowCloseRequest));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowEntered& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowEntered));
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowLeft& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<Event>(Event::WindowLeft));
}
void WindowServerConnection::handle(const Messages::WindowClient::KeyDown& message)
{
auto* window = Window::from_window_id(message.window_id());
if (!window)
return;
auto key_event = make<KeyEvent>(Event::KeyDown, (KeyCode)message.key(), message.modifiers(), message.code_point(), message.scancode());
Action* action = nullptr;
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, "Looking up action for {}", key_event->to_string());
if (auto* focused_widget = window->focused_widget()) {
for (auto* widget = focused_widget; widget && !action; widget = widget->parent_widget()) {
action = widget->action_for_key_event(*key_event);
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Focused widget {} gave action: {}", *widget, action);
}
}
if (!action) {
action = window->action_for_key_event(*key_event);
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Asked window {}, got action: {}", *window, action);
}
// NOTE: Application-global shortcuts are ignored while a modal window is up.
if (!action && !window->is_modal()) {
action = Application::the()->action_for_key_event(*key_event);
dbgln_if(KEYBOARD_SHORTCUTS_DEBUG, " > Asked application, got action: {}", action);
}
if (action) {
if (action->is_enabled()) {
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 && (message.modifiers() == (Mod_Ctrl | Mod_Alt)) && message.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().characters());
u32 code_point = *m_utf8_view.begin();
key_event->m_code_point = code_point;
}
Core::EventLoop::current().post_event(*window, move(key_event));
}
void WindowServerConnection::handle(const Messages::WindowClient::KeyUp& message)
{
auto* window = Window::from_window_id(message.window_id());
if (!window)
return;
auto key_event = make<KeyEvent>(Event::KeyUp, (KeyCode)message.key(), message.modifiers(), message.code_point(), message.scancode());
Core::EventLoop::current().post_event(*window, move(key_event));
}
static MouseButton to_gmousebutton(u32 button)
{
switch (button) {
case 0:
return MouseButton::None;
case 1:
return MouseButton::Left;
case 2:
return MouseButton::Right;
case 4:
return MouseButton::Middle;
case 8:
return MouseButton::Back;
case 16:
return MouseButton::Forward;
default:
VERIFY_NOT_REACHED();
break;
}
}
void WindowServerConnection::handle(const Messages::WindowClient::MouseDown& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseDown, message.mouse_position(), message.buttons(), to_gmousebutton(message.button()), message.modifiers(), message.wheel_delta()));
}
void WindowServerConnection::handle(const Messages::WindowClient::MouseUp& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseUp, message.mouse_position(), message.buttons(), to_gmousebutton(message.button()), message.modifiers(), message.wheel_delta()));
}
void WindowServerConnection::handle(const Messages::WindowClient::MouseMove& message)
{
if (auto* window = Window::from_window_id(message.window_id())) {
if (message.is_drag())
Core::EventLoop::current().post_event(*window, make<DragEvent>(Event::DragMove, message.mouse_position(), message.mime_types()));
else
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseMove, message.mouse_position(), message.buttons(), to_gmousebutton(message.button()), message.modifiers(), message.wheel_delta()));
}
}
void WindowServerConnection::handle(const Messages::WindowClient::MouseDoubleClick& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseDoubleClick, message.mouse_position(), message.buttons(), to_gmousebutton(message.button()), message.modifiers(), message.wheel_delta()));
}
void WindowServerConnection::handle(const Messages::WindowClient::MouseWheel& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
Core::EventLoop::current().post_event(*window, make<MouseEvent>(Event::MouseWheel, message.mouse_position(), message.buttons(), to_gmousebutton(message.button()), message.modifiers(), message.wheel_delta()));
}
void WindowServerConnection::handle(const Messages::WindowClient::MenuItemActivated& message)
{
auto* menu = Menu::from_menu_id(message.menu_id());
if (!menu) {
dbgln("EventLoop received event for invalid menu ID {}", message.menu_id());
return;
}
if (auto* action = menu->action_at(message.identifier()))
action->activate(menu);
}
void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowStateChanged& message)
{
if (auto* window = Window::from_window_id(message.wm_id()))
Core::EventLoop::current().post_event(*window, make<WMWindowStateChangedEvent>(message.client_id(), message.window_id(), message.parent_client_id(), message.parent_window_id(), message.title(), message.rect(), message.is_active(), message.is_modal(), static_cast<WindowType>(message.window_type()), message.is_minimized(), message.is_frameless(), message.progress()));
}
void WindowServerConnection::handle(const Messages::WindowClient::WM_AppletAreaSizeChanged& message)
{
if (auto* window = Window::from_window_id(message.wm_id()))
Core::EventLoop::current().post_event(*window, make<WMAppletAreaSizeChangedEvent>(message.size()));
}
void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowRectChanged& message)
{
if (auto* window = Window::from_window_id(message.wm_id()))
Core::EventLoop::current().post_event(*window, make<WMWindowRectChangedEvent>(message.client_id(), message.window_id(), message.rect()));
}
void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowIconBitmapChanged& message)
{
if (auto* window = Window::from_window_id(message.wm_id())) {
Core::EventLoop::current().post_event(*window, make<WMWindowIconBitmapChangedEvent>(message.client_id(), message.window_id(), message.bitmap().bitmap()));
}
}
void WindowServerConnection::handle(const Messages::WindowClient::WM_WindowRemoved& message)
{
if (auto* window = Window::from_window_id(message.wm_id()))
Core::EventLoop::current().post_event(*window, make<WMWindowRemovedEvent>(message.client_id(), message.window_id()));
}
void WindowServerConnection::handle(const Messages::WindowClient::ScreenRectChanged& message)
{
Desktop::the().did_receive_screen_rect({}, message.rect());
Window::for_each_window({}, [message](auto& window) {
Core::EventLoop::current().post_event(window, make<ScreenRectChangeEvent>(message.rect()));
});
}
void WindowServerConnection::handle(const Messages::WindowClient::AsyncSetWallpaperFinished&)
{
// This is handled manually by Desktop::set_wallpaper().
}
void WindowServerConnection::handle(const Messages::WindowClient::DragDropped& message)
{
if (auto* window = Window::from_window_id(message.window_id())) {
auto mime_data = Core::MimeData::construct(message.mime_data());
Core::EventLoop::current().post_event(*window, make<DropEvent>(message.mouse_position(), message.text(), mime_data));
}
}
void WindowServerConnection::handle(const Messages::WindowClient::DragAccepted&)
{
DragOperation::notify_accepted({});
}
void WindowServerConnection::handle(const Messages::WindowClient::DragCancelled&)
{
DragOperation::notify_cancelled({});
Application::the()->notify_drag_cancelled({});
}
void WindowServerConnection::handle(const Messages::WindowClient::WindowStateChanged& message)
{
if (auto* window = Window::from_window_id(message.window_id()))
window->notify_state_changed({}, message.minimized(), message.occluded());
}
void WindowServerConnection::handle(const Messages::WindowClient::DisplayLinkNotification&)
{
if (m_display_link_notification_pending)
return;
m_display_link_notification_pending = true;
deferred_invoke([this](auto&) {
DisplayLink::notify({});
m_display_link_notification_pending = false;
});
}
void WindowServerConnection::handle(const Messages::WindowClient::Ping&)
{
post_message(Messages::WindowServer::Pong());
}
}
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