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ladybird/Userland/Libraries/LibGUI/Window.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) 2018-2021, 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/HashMap.h>
#include <AK/JsonObject.h>
#include <AK/NeverDestroyed.h>
#include <AK/ScopeGuard.h>
#include <LibCore/EventLoop.h>
#include <LibCore/MimeData.h>
#include <LibGUI/Action.h>
#include <LibGUI/Application.h>
#include <LibGUI/Desktop.h>
#include <LibGUI/Event.h>
#include <LibGUI/MenuBar.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Widget.h>
#include <LibGUI/Window.h>
#include <LibGUI/WindowServerConnection.h>
#include <LibGfx/Bitmap.h>
#include <fcntl.h>
#include <serenity.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
namespace GUI {
static i32 s_next_backing_store_serial;
class WindowBackingStore {
public:
WindowBackingStore(NonnullRefPtr<Gfx::Bitmap> bitmap)
: m_bitmap(bitmap)
, m_serial(++s_next_backing_store_serial)
{
}
Gfx::Bitmap& bitmap() { return *m_bitmap; }
const Gfx::Bitmap& bitmap() const { return *m_bitmap; }
Gfx::IntSize size() const { return m_bitmap->size(); }
i32 serial() const { return m_serial; }
private:
NonnullRefPtr<Gfx::Bitmap> m_bitmap;
const i32 m_serial;
};
static NeverDestroyed<HashTable<Window*>> all_windows;
static NeverDestroyed<HashMap<int, Window*>> reified_windows;
Window* Window::from_window_id(int window_id)
{
auto it = reified_windows->find(window_id);
if (it != reified_windows->end())
return (*it).value;
return nullptr;
}
Window::Window(Core::Object* parent)
: Core::Object(parent)
{
all_windows->set(this);
m_rect_when_windowless = { -5000, -5000, 140, 140 };
m_title_when_windowless = "GUI::Window";
register_property(
"title",
[this] { return title(); },
[this](auto& value) {
set_title(value.to_string());
return true;
});
register_property("visible", [this] { return is_visible(); });
register_property("active", [this] { return is_active(); });
REGISTER_BOOL_PROPERTY("minimizable", is_minimizable, set_minimizable);
REGISTER_BOOL_PROPERTY("resizable", is_resizable, set_resizable);
REGISTER_BOOL_PROPERTY("fullscreen", is_fullscreen, set_fullscreen);
REGISTER_RECT_PROPERTY("rect", rect, set_rect);
REGISTER_SIZE_PROPERTY("base_size", base_size, set_base_size);
REGISTER_SIZE_PROPERTY("size_increment", size_increment, set_size_increment);
}
Window::~Window()
{
if (m_menubar)
m_menubar->notify_removed_from_window({});
all_windows->remove(this);
hide();
}
void Window::close()
{
hide();
if (on_close)
on_close();
}
void Window::move_to_front()
{
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::MoveWindowToFront>(m_window_id);
}
void Window::show()
{
if (is_visible())
return;
auto* parent_window = find_parent_window();
m_cursor = Gfx::StandardCursor::None;
auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::CreateWindow>(
m_rect_when_windowless,
!m_moved_by_client,
m_has_alpha_channel,
m_modal,
m_minimizable,
m_resizable,
m_fullscreen,
m_frameless,
m_accessory,
m_opacity_when_windowless,
m_alpha_hit_threshold,
m_base_size,
m_size_increment,
m_minimum_size_when_windowless,
m_resize_aspect_ratio,
(i32)m_window_type,
m_title_when_windowless,
parent_window ? parent_window->window_id() : 0);
m_window_id = response->window_id();
m_visible = true;
apply_icon();
if (m_menubar) {
// This little dance makes us create a server-side menubar.
auto menubar = move(m_menubar);
set_menubar(menubar);
}
reified_windows->set(m_window_id, this);
Application::the()->did_create_window({});
update();
}
Window* Window::find_parent_window()
{
for (auto* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
if (is<Window>(ancestor))
return static_cast<Window*>(ancestor);
}
return nullptr;
}
void Window::server_did_destroy()
{
reified_windows->remove(m_window_id);
m_window_id = 0;
m_visible = false;
m_pending_paint_event_rects.clear();
m_back_store = nullptr;
m_front_store = nullptr;
m_cursor = Gfx::StandardCursor::None;
}
void Window::hide()
{
if (!is_visible())
return;
auto response = WindowServerConnection::the().send_sync<Messages::WindowServer::DestroyWindow>(m_window_id);
server_did_destroy();
for (auto child_window_id : response->destroyed_window_ids()) {
if (auto* window = Window::from_window_id(child_window_id)) {
window->server_did_destroy();
}
}
if (auto* app = Application::the()) {
bool app_has_visible_windows = false;
for (auto& window : *all_windows) {
if (window->is_visible()) {
app_has_visible_windows = true;
break;
}
}
if (!app_has_visible_windows)
app->did_delete_last_window({});
}
}
void Window::set_title(const StringView& title)
{
m_title_when_windowless = title;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowTitle>(m_window_id, title);
}
String Window::title() const
{
if (!is_visible())
return m_title_when_windowless;
return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowTitle>(m_window_id)->title();
}
Gfx::IntRect Window::applet_rect_on_screen() const
{
VERIFY(m_window_type == WindowType::MenuApplet);
return WindowServerConnection::the().send_sync<Messages::WindowServer::GetAppletRectOnScreen>(m_window_id)->rect();
}
Gfx::IntRect Window::rect() const
{
if (!is_visible())
return m_rect_when_windowless;
return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowRect>(m_window_id)->rect();
}
void Window::set_rect(const Gfx::IntRect& a_rect)
{
if (a_rect.location() != m_rect_when_windowless.location()) {
m_moved_by_client = true;
}
m_rect_when_windowless = a_rect;
if (!is_visible()) {
if (m_main_widget)
m_main_widget->resize(m_rect_when_windowless.size());
return;
}
auto window_rect = WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowRect>(m_window_id, a_rect)->rect();
if (m_back_store && m_back_store->size() != window_rect.size())
m_back_store = nullptr;
if (m_front_store && m_front_store->size() != window_rect.size())
m_front_store = nullptr;
if (m_main_widget)
m_main_widget->resize(window_rect.size());
}
Gfx::IntSize Window::minimum_size() const
{
if (!is_visible())
return m_minimum_size_when_windowless;
return WindowServerConnection::the().send_sync<Messages::WindowServer::GetWindowMinimumSize>(m_window_id)->size();
}
void Window::set_minimum_size(const Gfx::IntSize& size)
{
m_minimum_size_modified = true;
m_minimum_size_when_windowless = size;
if (is_visible())
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowMinimumSize>(m_window_id, size);
}
void Window::center_on_screen()
{
auto window_rect = rect();
window_rect.center_within(Desktop::the().rect());
set_rect(window_rect);
}
void Window::center_within(const Window& other)
{
if (this == &other)
return;
auto window_rect = rect();
window_rect.center_within(other.rect());
set_rect(window_rect);
}
void Window::set_window_type(WindowType window_type)
{
m_window_type = window_type;
if (!m_minimum_size_modified) {
// Apply minimum size defaults.
if (m_window_type == WindowType::Normal || m_window_type == WindowType::ToolWindow)
m_minimum_size_when_windowless = { 50, 50 };
else
m_minimum_size_when_windowless = { 1, 1 };
}
}
void Window::set_cursor(Gfx::StandardCursor cursor)
{
if (m_cursor == cursor)
return;
m_cursor = cursor;
m_custom_cursor = nullptr;
update_cursor();
}
void Window::set_cursor(const Gfx::Bitmap& cursor)
{
if (m_custom_cursor == &cursor)
return;
m_cursor = Gfx::StandardCursor::None;
m_custom_cursor = &cursor;
update_cursor();
}
void Window::handle_drop_event(DropEvent& event)
{
if (!m_main_widget)
return;
auto result = m_main_widget->hit_test(event.position());
auto local_event = make<DropEvent>(result.local_position, event.text(), event.mime_data());
VERIFY(result.widget);
result.widget->dispatch_event(*local_event, this);
Application::the()->set_drag_hovered_widget({}, nullptr);
}
void Window::handle_mouse_event(MouseEvent& event)
{
if (m_global_cursor_tracking_widget) {
auto window_relative_rect = m_global_cursor_tracking_widget->window_relative_rect();
Gfx::IntPoint local_point { event.x() - window_relative_rect.x(), event.y() - window_relative_rect.y() };
auto local_event = make<MouseEvent>((Event::Type)event.type(), local_point, event.buttons(), event.button(), event.modifiers(), event.wheel_delta());
m_global_cursor_tracking_widget->dispatch_event(*local_event, this);
return;
}
if (m_automatic_cursor_tracking_widget) {
auto window_relative_rect = m_automatic_cursor_tracking_widget->window_relative_rect();
Gfx::IntPoint local_point { event.x() - window_relative_rect.x(), event.y() - window_relative_rect.y() };
auto local_event = make<MouseEvent>((Event::Type)event.type(), local_point, event.buttons(), event.button(), event.modifiers(), event.wheel_delta());
m_automatic_cursor_tracking_widget->dispatch_event(*local_event, this);
if (event.buttons() == 0)
m_automatic_cursor_tracking_widget = nullptr;
return;
}
if (!m_main_widget)
return;
auto result = m_main_widget->hit_test(event.position());
auto local_event = make<MouseEvent>((Event::Type)event.type(), result.local_position, event.buttons(), event.button(), event.modifiers(), event.wheel_delta());
VERIFY(result.widget);
set_hovered_widget(result.widget);
if (event.buttons() != 0 && !m_automatic_cursor_tracking_widget)
m_automatic_cursor_tracking_widget = *result.widget;
if (result.widget != m_global_cursor_tracking_widget.ptr())
result.widget->dispatch_event(*local_event, this);
if (!m_pending_paint_event_rects.is_empty()) {
MultiPaintEvent paint_event(move(m_pending_paint_event_rects), size());
handle_multi_paint_event(paint_event);
}
}
void Window::handle_multi_paint_event(MultiPaintEvent& event)
{
if (!is_visible())
return;
if (!m_main_widget)
return;
auto rects = event.rects();
if (!m_pending_paint_event_rects.is_empty()) {
// It's possible that there had been some calls to update() that
// haven't been flushed. We can handle these right now, avoiding
// another round trip.
rects.append(move(m_pending_paint_event_rects));
}
VERIFY(!rects.is_empty());
if (m_back_store && m_back_store->size() != event.window_size()) {
// Eagerly discard the backing store if we learn from this paint event that it needs to be bigger.
// Otherwise we would have to wait for a resize event to tell us. This way we don't waste the
// effort on painting into an undersized bitmap that will be thrown away anyway.
m_back_store = nullptr;
}
bool created_new_backing_store = !m_back_store;
if (!m_back_store) {
m_back_store = create_backing_store(event.window_size());
VERIFY(m_back_store);
} else if (m_double_buffering_enabled) {
bool still_has_pixels = m_back_store->bitmap().set_nonvolatile();
if (!still_has_pixels) {
m_back_store = create_backing_store(event.window_size());
VERIFY(m_back_store);
created_new_backing_store = true;
}
}
auto rect = rects.first();
if (rect.is_empty() || created_new_backing_store) {
rects.clear();
rects.append({ {}, event.window_size() });
}
for (auto& rect : rects) {
PaintEvent paint_event(rect);
m_main_widget->dispatch_event(paint_event, this);
}
if (m_double_buffering_enabled)
flip(rects);
else if (created_new_backing_store)
set_current_backing_store(*m_back_store, true);
if (is_visible())
WindowServerConnection::the().post_message(Messages::WindowServer::DidFinishPainting(m_window_id, rects));
}
void Window::handle_key_event(KeyEvent& event)
{
if (!m_focused_widget && event.type() == Event::KeyDown && event.key() == Key_Tab && !event.ctrl() && !event.alt() && !event.super()) {
focus_a_widget_if_possible(FocusSource::Keyboard);
return;
}
if (m_focused_widget)
return m_focused_widget->dispatch_event(event, this);
if (m_main_widget)
return m_main_widget->dispatch_event(event, this);
}
void Window::handle_resize_event(ResizeEvent& event)
{
auto new_size = event.size();
if (m_back_store && m_back_store->size() != new_size)
m_back_store = nullptr;
if (!m_pending_paint_event_rects.is_empty()) {
m_pending_paint_event_rects.clear_with_capacity();
m_pending_paint_event_rects.append({ {}, new_size });
}
m_rect_when_windowless = { {}, new_size };
if (m_main_widget)
m_main_widget->set_relative_rect({ {}, new_size });
}
void Window::handle_input_entered_or_left_event(Core::Event& event)
{
m_is_active_input = event.type() == Event::WindowInputEntered;
if (on_active_input_change)
on_active_input_change(m_is_active_input);
if (m_main_widget)
m_main_widget->dispatch_event(event, this);
if (m_focused_widget)
m_focused_widget->update();
}
void Window::handle_became_active_or_inactive_event(Core::Event& event)
{
if (event.type() == Event::WindowBecameActive)
Application::the()->window_did_become_active({}, *this);
else
Application::the()->window_did_become_inactive({}, *this);
if (m_main_widget)
m_main_widget->dispatch_event(event, this);
if (m_focused_widget)
m_focused_widget->update();
}
void Window::handle_close_request()
{
if (on_close_request) {
if (on_close_request() == Window::CloseRequestDecision::StayOpen)
return;
}
close();
}
void Window::handle_theme_change_event(ThemeChangeEvent& event)
{
if (!m_main_widget)
return;
auto dispatch_theme_change = [&](auto& widget, auto recursive) {
widget.dispatch_event(event, this);
widget.for_each_child_widget([&](auto& widget) -> IterationDecision {
widget.dispatch_event(event, this);
recursive(widget, recursive);
return IterationDecision::Continue;
});
};
dispatch_theme_change(*m_main_widget.ptr(), dispatch_theme_change);
}
void Window::handle_screen_rect_change_event(ScreenRectChangeEvent& event)
{
if (!m_main_widget)
return;
auto dispatch_screen_rect_change = [&](auto& widget, auto recursive) {
widget.dispatch_event(event, this);
widget.for_each_child_widget([&](auto& widget) -> IterationDecision {
widget.dispatch_event(event, this);
recursive(widget, recursive);
return IterationDecision::Continue;
});
};
dispatch_screen_rect_change(*m_main_widget.ptr(), dispatch_screen_rect_change);
screen_rect_change_event(event);
}
void Window::handle_drag_move_event(DragEvent& event)
{
if (!m_main_widget)
return;
auto result = m_main_widget->hit_test(event.position());
VERIFY(result.widget);
Application::the()->set_drag_hovered_widget({}, result.widget, result.local_position, event.mime_types());
// NOTE: Setting the drag hovered widget may have executed arbitrary code, so re-check that the widget is still there.
if (!result.widget)
return;
if (result.widget->has_pending_drop()) {
DragEvent drag_move_event(static_cast<Event::Type>(event.type()), result.local_position, event.mime_types());
result.widget->dispatch_event(drag_move_event, this);
}
}
void Window::handle_left_event()
{
set_hovered_widget(nullptr);
Application::the()->set_drag_hovered_widget({}, nullptr);
}
void Window::event(Core::Event& event)
{
ScopeGuard guard([&] {
// Accept the event so it doesn't bubble up to parent windows!
event.accept();
});
if (event.type() == Event::Drop)
return handle_drop_event(static_cast<DropEvent&>(event));
if (event.type() == Event::MouseUp || event.type() == Event::MouseDown || event.type() == Event::MouseDoubleClick || event.type() == Event::MouseMove || event.type() == Event::MouseWheel)
return handle_mouse_event(static_cast<MouseEvent&>(event));
if (event.type() == Event::MultiPaint)
return handle_multi_paint_event(static_cast<MultiPaintEvent&>(event));
if (event.type() == Event::KeyUp || event.type() == Event::KeyDown)
return handle_key_event(static_cast<KeyEvent&>(event));
if (event.type() == Event::WindowBecameActive || event.type() == Event::WindowBecameInactive)
return handle_became_active_or_inactive_event(event);
if (event.type() == Event::WindowInputEntered || event.type() == Event::WindowInputLeft)
return handle_input_entered_or_left_event(event);
if (event.type() == Event::WindowCloseRequest)
return handle_close_request();
if (event.type() == Event::WindowLeft)
return handle_left_event();
if (event.type() == Event::Resize)
return handle_resize_event(static_cast<ResizeEvent&>(event));
if (event.type() > Event::__Begin_WM_Events && event.type() < Event::__End_WM_Events)
return wm_event(static_cast<WMEvent&>(event));
if (event.type() == Event::DragMove)
return handle_drag_move_event(static_cast<DragEvent&>(event));
if (event.type() == Event::ThemeChange)
return handle_theme_change_event(static_cast<ThemeChangeEvent&>(event));
if (event.type() == Event::ScreenRectChange)
return handle_screen_rect_change_event(static_cast<ScreenRectChangeEvent&>(event));
Core::Object::event(event);
}
bool Window::is_visible() const
{
return m_visible;
}
void Window::update()
{
auto rect = this->rect();
update({ 0, 0, rect.width(), rect.height() });
}
void Window::force_update()
{
if (!is_visible())
return;
auto rect = this->rect();
WindowServerConnection::the().post_message(Messages::WindowServer::InvalidateRect(m_window_id, { { 0, 0, rect.width(), rect.height() } }, true));
}
void Window::update(const Gfx::IntRect& a_rect)
{
if (!is_visible())
return;
for (auto& pending_rect : m_pending_paint_event_rects) {
if (pending_rect.contains(a_rect)) {
#if UPDATE_COALESCING_DEBUG
dbgln("Ignoring {} since it's contained by pending rect {}", a_rect, pending_rect);
#endif
return;
}
}
if (m_pending_paint_event_rects.is_empty()) {
deferred_invoke([this](auto&) {
auto rects = move(m_pending_paint_event_rects);
if (rects.is_empty())
return;
WindowServerConnection::the().post_message(Messages::WindowServer::InvalidateRect(m_window_id, rects, false));
});
}
m_pending_paint_event_rects.append(a_rect);
}
void Window::set_main_widget(Widget* widget)
{
if (m_main_widget == widget)
return;
if (m_main_widget) {
m_main_widget->set_window(nullptr);
remove_child(*m_main_widget);
}
m_main_widget = widget;
if (m_main_widget) {
add_child(*widget);
auto new_window_rect = rect();
if (m_main_widget->min_width() >= 0)
new_window_rect.set_width(max(new_window_rect.width(), m_main_widget->min_width()));
if (m_main_widget->min_height() >= 0)
new_window_rect.set_height(max(new_window_rect.height(), m_main_widget->min_height()));
set_rect(new_window_rect);
m_main_widget->set_relative_rect({ {}, new_window_rect.size() });
m_main_widget->set_window(this);
if (m_main_widget->focus_policy() != FocusPolicy::NoFocus)
m_main_widget->set_focus(true);
}
update();
}
void Window::set_focused_widget(Widget* widget, FocusSource source)
{
if (m_focused_widget == widget)
return;
WeakPtr<Widget> previously_focused_widget = m_focused_widget;
m_focused_widget = widget;
if (previously_focused_widget) {
Core::EventLoop::current().post_event(*previously_focused_widget, make<FocusEvent>(Event::FocusOut, source));
previously_focused_widget->update();
if (previously_focused_widget && previously_focused_widget->on_focus_change)
previously_focused_widget->on_focus_change(previously_focused_widget->is_focused(), source);
}
if (m_focused_widget) {
Core::EventLoop::current().post_event(*m_focused_widget, make<FocusEvent>(Event::FocusIn, source));
m_focused_widget->update();
if (m_focused_widget && m_focused_widget->on_focus_change)
m_focused_widget->on_focus_change(m_focused_widget->is_focused(), source);
}
}
void Window::set_global_cursor_tracking_widget(Widget* widget)
{
if (widget == m_global_cursor_tracking_widget)
return;
m_global_cursor_tracking_widget = widget;
}
void Window::set_automatic_cursor_tracking_widget(Widget* widget)
{
if (widget == m_automatic_cursor_tracking_widget)
return;
m_automatic_cursor_tracking_widget = widget;
}
void Window::set_has_alpha_channel(bool value)
{
if (m_has_alpha_channel == value)
return;
m_has_alpha_channel = value;
if (!is_visible())
return;
m_pending_paint_event_rects.clear();
m_back_store = nullptr;
m_front_store = nullptr;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowHasAlphaChannel>(m_window_id, value);
update();
}
void Window::set_double_buffering_enabled(bool value)
{
VERIFY(!is_visible());
m_double_buffering_enabled = value;
}
void Window::set_opacity(float opacity)
{
m_opacity_when_windowless = opacity;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowOpacity>(m_window_id, opacity);
}
void Window::set_alpha_hit_threshold(float threshold)
{
if (threshold < 0.0f)
threshold = 0.0f;
else if (threshold > 1.0f)
threshold = 1.0f;
if (m_alpha_hit_threshold == threshold)
return;
m_alpha_hit_threshold = threshold;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowAlphaHitThreshold>(m_window_id, threshold);
}
void Window::set_hovered_widget(Widget* widget)
{
if (widget == m_hovered_widget)
return;
if (m_hovered_widget)
Core::EventLoop::current().post_event(*m_hovered_widget, make<Event>(Event::Leave));
m_hovered_widget = widget;
if (m_hovered_widget)
Core::EventLoop::current().post_event(*m_hovered_widget, make<Event>(Event::Enter));
}
void Window::set_current_backing_store(WindowBackingStore& backing_store, bool flush_immediately)
{
auto& bitmap = backing_store.bitmap();
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBackingStore>(m_window_id, 32, bitmap.pitch(), bitmap.anon_fd(), backing_store.serial(), bitmap.has_alpha_channel(), bitmap.size(), flush_immediately);
}
void Window::flip(const Vector<Gfx::IntRect, 32>& dirty_rects)
{
swap(m_front_store, m_back_store);
set_current_backing_store(*m_front_store);
if (!m_back_store || m_back_store->size() != m_front_store->size()) {
m_back_store = create_backing_store(m_front_store->size());
VERIFY(m_back_store);
memcpy(m_back_store->bitmap().scanline(0), m_front_store->bitmap().scanline(0), m_front_store->bitmap().size_in_bytes());
m_back_store->bitmap().set_volatile();
return;
}
// Copy whatever was painted from the front to the back.
Painter painter(m_back_store->bitmap());
for (auto& dirty_rect : dirty_rects)
painter.blit(dirty_rect.location(), m_front_store->bitmap(), dirty_rect, 1.0f, false);
m_back_store->bitmap().set_volatile();
}
OwnPtr<WindowBackingStore> Window::create_backing_store(const Gfx::IntSize& size)
{
auto format = m_has_alpha_channel ? Gfx::BitmapFormat::BGRA8888 : Gfx::BitmapFormat::BGRx8888;
VERIFY(!size.is_empty());
size_t pitch = Gfx::Bitmap::minimum_pitch(size.width(), format);
size_t size_in_bytes = size.height() * pitch;
auto anon_fd = anon_create(round_up_to_power_of_two(size_in_bytes, PAGE_SIZE), O_CLOEXEC);
if (anon_fd < 0) {
perror("anon_create");
return {};
}
// FIXME: Plumb scale factor here eventually.
auto bitmap = Gfx::Bitmap::create_with_anon_fd(format, anon_fd, size, 1, {}, Gfx::Bitmap::ShouldCloseAnonymousFile::No);
if (!bitmap)
return {};
return make<WindowBackingStore>(bitmap.release_nonnull());
}
void Window::set_modal(bool modal)
{
VERIFY(!is_visible());
m_modal = modal;
}
void Window::wm_event(WMEvent&)
{
}
void Window::screen_rect_change_event(ScreenRectChangeEvent&)
{
}
void Window::set_icon(const Gfx::Bitmap* icon)
{
if (m_icon == icon)
return;
Gfx::IntSize icon_size = icon ? icon->size() : Gfx::IntSize(16, 16);
m_icon = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, icon_size);
VERIFY(m_icon);
if (icon) {
Painter painter(*m_icon);
painter.blit({ 0, 0 }, *icon, icon->rect());
}
apply_icon();
}
void Window::apply_icon()
{
if (!m_icon)
return;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowIconBitmap>(m_window_id, m_icon->to_shareable_bitmap());
}
void Window::start_interactive_resize()
{
WindowServerConnection::the().post_message(Messages::WindowServer::StartWindowResize(m_window_id));
}
Vector<Widget*> Window::focusable_widgets(FocusSource source) const
{
if (!m_main_widget)
return {};
HashTable<Widget*> seen_widgets;
Vector<Widget*> collected_widgets;
Function<void(Widget&)> collect_focusable_widgets = [&](auto& widget) {
bool widget_accepts_focus = false;
switch (source) {
case FocusSource::Keyboard:
widget_accepts_focus = has_flag(widget.focus_policy(), FocusPolicy::TabFocus);
break;
case FocusSource::Mouse:
widget_accepts_focus = has_flag(widget.focus_policy(), FocusPolicy::ClickFocus);
break;
case FocusSource::Programmatic:
widget_accepts_focus = widget.focus_policy() != FocusPolicy::NoFocus;
break;
}
if (widget_accepts_focus) {
auto& effective_focus_widget = widget.focus_proxy() ? *widget.focus_proxy() : widget;
if (seen_widgets.set(&effective_focus_widget) == AK::HashSetResult::InsertedNewEntry)
collected_widgets.append(&effective_focus_widget);
}
widget.for_each_child_widget([&](auto& child) {
if (!child.is_visible())
return IterationDecision::Continue;
if (!child.is_enabled())
return IterationDecision::Continue;
collect_focusable_widgets(child);
return IterationDecision::Continue;
});
};
collect_focusable_widgets(const_cast<Widget&>(*m_main_widget));
return collected_widgets;
}
void Window::set_fullscreen(bool fullscreen)
{
if (m_fullscreen == fullscreen)
return;
m_fullscreen = fullscreen;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetFullscreen>(m_window_id, fullscreen);
}
void Window::set_frameless(bool frameless)
{
if (m_frameless == frameless)
return;
m_frameless = frameless;
if (!is_visible())
return;
WindowServerConnection::the().send_sync<Messages::WindowServer::SetFrameless>(m_window_id, frameless);
}
bool Window::is_maximized() const
{
if (!is_visible())
return false;
return WindowServerConnection::the().send_sync<Messages::WindowServer::IsMaximized>(m_window_id)->maximized();
}
void Window::schedule_relayout()
{
if (m_layout_pending)
return;
m_layout_pending = true;
deferred_invoke([this](auto&) {
if (main_widget())
main_widget()->do_layout();
update();
m_layout_pending = false;
});
}
void Window::refresh_system_theme()
{
WindowServerConnection::the().post_message(Messages::WindowServer::RefreshSystemTheme());
}
void Window::for_each_window(Badge<WindowServerConnection>, Function<void(Window&)> callback)
{
for (auto& e : *reified_windows) {
VERIFY(e.value);
callback(*e.value);
}
}
void Window::update_all_windows(Badge<WindowServerConnection>)
{
for (auto& e : *reified_windows) {
e.value->force_update();
}
}
void Window::notify_state_changed(Badge<WindowServerConnection>, bool minimized, bool occluded)
{
m_visible_for_timer_purposes = !minimized && !occluded;
// When double buffering is enabled, minimization/occlusion means we can mark the front bitmap volatile (in addition to the back bitmap.)
// When double buffering is disabled, there is only the back bitmap (which we can now mark volatile!)
auto& store = m_double_buffering_enabled ? m_front_store : m_back_store;
if (!store)
return;
if (minimized || occluded) {
store->bitmap().set_volatile();
} else {
if (!store->bitmap().set_nonvolatile()) {
store = nullptr;
update();
}
}
}
Action* Window::action_for_key_event(const KeyEvent& event)
{
Shortcut shortcut(event.modifiers(), (KeyCode)event.key());
Action* found_action = nullptr;
for_each_child_of_type<Action>([&](auto& action) {
if (action.shortcut() == shortcut) {
found_action = &action;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return found_action;
}
void Window::set_base_size(const Gfx::IntSize& base_size)
{
if (m_base_size == base_size)
return;
m_base_size = base_size;
if (is_visible())
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBaseSizeAndSizeIncrement>(m_window_id, m_base_size, m_size_increment);
}
void Window::set_size_increment(const Gfx::IntSize& size_increment)
{
if (m_size_increment == size_increment)
return;
m_size_increment = size_increment;
if (is_visible())
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowBaseSizeAndSizeIncrement>(m_window_id, m_base_size, m_size_increment);
}
void Window::set_resize_aspect_ratio(const Optional<Gfx::IntSize>& ratio)
{
if (m_resize_aspect_ratio == ratio)
return;
m_resize_aspect_ratio = ratio;
if (is_visible())
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowResizeAspectRatio>(m_window_id, m_resize_aspect_ratio);
}
void Window::did_add_widget(Badge<Widget>, Widget&)
{
if (!m_focused_widget)
focus_a_widget_if_possible(FocusSource::Mouse);
}
void Window::did_remove_widget(Badge<Widget>, Widget& widget)
{
if (m_focused_widget == &widget)
m_focused_widget = nullptr;
if (m_hovered_widget == &widget)
m_hovered_widget = nullptr;
if (m_global_cursor_tracking_widget == &widget)
m_global_cursor_tracking_widget = nullptr;
if (m_automatic_cursor_tracking_widget == &widget)
m_automatic_cursor_tracking_widget = nullptr;
}
void Window::set_progress(int progress)
{
VERIFY(m_window_id);
WindowServerConnection::the().post_message(Messages::WindowServer::SetWindowProgress(m_window_id, progress));
}
void Window::update_cursor()
{
Gfx::StandardCursor new_cursor;
if (m_hovered_widget && m_hovered_widget->override_cursor() != Gfx::StandardCursor::None)
new_cursor = m_hovered_widget->override_cursor();
else
new_cursor = m_cursor;
if (m_effective_cursor == new_cursor)
return;
m_effective_cursor = new_cursor;
if (m_custom_cursor)
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowCustomCursor>(m_window_id, m_custom_cursor->to_shareable_bitmap());
else
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowCursor>(m_window_id, (u32)m_effective_cursor);
}
void Window::focus_a_widget_if_possible(FocusSource source)
{
auto focusable_widgets = this->focusable_widgets(source);
if (!focusable_widgets.is_empty())
set_focused_widget(focusable_widgets[0], source);
}
void Window::did_disable_focused_widget(Badge<Widget>)
{
focus_a_widget_if_possible(FocusSource::Mouse);
}
bool Window::is_active() const
{
VERIFY(Application::the());
return this == Application::the()->active_window();
}
Gfx::Bitmap* Window::back_bitmap()
{
return m_back_store ? &m_back_store->bitmap() : nullptr;
}
void Window::set_menubar(RefPtr<MenuBar> menubar)
{
if (m_menubar == menubar)
return;
if (m_menubar)
m_menubar->notify_removed_from_window({});
m_menubar = move(menubar);
if (m_window_id && m_menubar) {
m_menubar->notify_added_to_window({});
WindowServerConnection::the().send_sync<Messages::WindowServer::SetWindowMenubar>(m_window_id, m_menubar->menubar_id());
}
}
}
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