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ladybird/Userland/Libraries/LibGUI/Window.cpp
Joe Bentley 9df79a77da WindowServer: Add message to notify clients of applet area resize 
Applets and windows would like to be able to know when the applet
area has been resized. For example, this happens asynchronously after
an applet has been resized, so we cannot then rely on the applet area
position synchronously after resizing. This adds a new message
applet_area_rect_changed and associated Event AppletAreaRectChange,
and the appropriate virtual functions.
2021-08-31 16:49:22 +02:00

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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/HashMap.h>
#include <AK/IDAllocator.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/WindowManagerServerConnection.h>
#include <LibGUI/WindowServerConnection.h>
#include <LibGfx/Bitmap.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
namespace GUI {
static i32 s_next_backing_store_serial;
static IDAllocator s_window_id_allocator;
class WindowBackingStore {
public:
explicit WindowBackingStore(NonnullRefPtr<Gfx::Bitmap> bitmap)
: m_bitmap(move(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)
, m_menubar(Menubar::construct())
{
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()
{
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().async_move_window_to_front(m_window_id);
}
void Window::show()
{
if (is_visible())
return;
auto* parent_window = find_parent_window();
m_window_id = s_window_id_allocator.allocate();
Gfx::IntRect launch_origin_rect;
if (auto* launch_origin_rect_string = getenv("__libgui_launch_origin_rect")) {
auto parts = StringView(launch_origin_rect_string).split_view(',');
if (parts.size() == 4) {
launch_origin_rect = Gfx::IntRect {
parts[0].to_int().value_or(0),
parts[1].to_int().value_or(0),
parts[2].to_int().value_or(0),
parts[3].to_int().value_or(0),
};
}
unsetenv("__libgui_launch_origin_rect");
}
WindowServerConnection::the().async_create_window(
m_window_id,
m_rect_when_windowless,
!m_moved_by_client,
m_has_alpha_channel,
m_modal,
m_minimizable,
m_resizable,
m_fullscreen,
m_frameless,
m_forced_shadow,
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,
launch_origin_rect);
m_visible = true;
apply_icon();
m_menubar->for_each_menu([&](Menu& menu) {
menu.realize_menu_if_needed();
WindowServerConnection::the().async_add_menu(m_window_id, menu.menu_id());
return IterationDecision::Continue;
});
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 destroyed_window_ids = WindowServerConnection::the().destroy_window(m_window_id);
server_did_destroy();
for (auto child_window_id : 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(String title)
{
m_title_when_windowless = move(title);
if (!is_visible())
return;
WindowServerConnection::the().async_set_window_title(m_window_id, m_title_when_windowless);
}
String Window::title() const
{
if (!is_visible())
return m_title_when_windowless;
return WindowServerConnection::the().get_window_title(m_window_id);
}
Gfx::IntRect Window::applet_rect_on_screen() const
{
VERIFY(m_window_type == WindowType::Applet);
return WindowServerConnection::the().get_applet_rect_on_screen(m_window_id);
}
Gfx::IntRect Window::rect() const
{
if (!is_visible())
return m_rect_when_windowless;
return WindowServerConnection::the().get_window_rect(m_window_id);
}
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().set_window_rect(m_window_id, a_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().get_window_minimum_size(m_window_id);
}
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().async_set_window_minimum_size(m_window_id, size);
}
void Window::center_on_screen()
{
set_rect(rect().centered_within(Desktop::the().rect()));
}
void Window::center_within(const Window& other)
{
if (this == &other)
return;
set_rect(rect().centered_within(other.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::make_window_manager(unsigned event_mask)
{
GUI::WindowManagerServerConnection::the().async_set_event_mask(event_mask);
GUI::WindowManagerServerConnection::the().async_set_manager_window(m_window_id);
}
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 = 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 = 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 = 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.extend(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 was_purged = false;
bool bitmap_has_memory = m_back_store->bitmap().set_nonvolatile(was_purged);
if (!bitmap_has_memory) {
// We didn't have enough memory to make the bitmap non-volatile!
// Fall back to single-buffered mode for this window.
// FIXME: Once we have a way to listen for system memory pressure notifications,
// it would be cool to transition back into double-buffered mode once
// the coast is clear.
dbgln("Not enough memory to make backing store non-volatile. Falling back to single-buffered mode.");
m_double_buffering_enabled = false;
m_back_store = move(m_front_store);
created_new_backing_store = true;
} else if (was_purged) {
// The backing store bitmap was cleared, but it does have memory.
// Act as if it's a new backing store so the entire window gets repainted.
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().async_did_finish_painting(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);
}
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 (on_active_window_change)
on_active_window_change(event.type() == Event::WindowBecameActive);
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_fonts_change_event(FontsChangeEvent& event)
{
if (!m_main_widget)
return;
auto dispatch_fonts_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_fonts_change(*m_main_widget.ptr(), dispatch_fonts_change);
}
void Window::handle_screen_rects_change_event(ScreenRectsChangeEvent& event)
{
if (!m_main_widget)
return;
auto dispatch_screen_rects_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_rects_change(*m_main_widget.ptr(), dispatch_screen_rects_change);
screen_rects_change_event(event);
}
void Window::handle_applet_area_rect_change_event(AppletAreaRectChangeEvent& event)
{
if (!m_main_widget)
return;
auto dispatch_applet_area_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_applet_area_rect_change(*m_main_widget.ptr(), dispatch_applet_area_rect_change);
applet_area_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::enter_event(Core::Event&)
{
}
void Window::leave_event(Core::Event&)
{
}
void Window::handle_entered_event(Core::Event& event)
{
enter_event(event);
}
void Window::handle_left_event(Core::Event& event)
{
set_hovered_widget(nullptr);
Application::the()->set_drag_hovered_widget({}, nullptr);
leave_event(event);
}
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::WindowEntered)
return handle_entered_event(event);
if (event.type() == Event::WindowLeft)
return handle_left_event(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::FontsChange)
return handle_fonts_change_event(static_cast<FontsChangeEvent&>(event));
if (event.type() == Event::ScreenRectsChange)
return handle_screen_rects_change_event(static_cast<ScreenRectsChangeEvent&>(event));
if (event.type() == Event::AppletAreaRectChange)
return handle_applet_area_rect_change_event(static_cast<AppletAreaRectChangeEvent&>(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().async_invalidate_rect(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)) {
dbgln_if(UPDATE_COALESCING_DEBUG, "Ignoring {} since it's contained by pending rect {}", a_rect, pending_rect);
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().async_invalidate_rect(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 (!m_focused_widget && m_previously_focused_widget)
m_focused_widget = m_previously_focused_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);
m_previously_focused_widget = previously_focused_widget;
}
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().async_set_window_has_alpha_channel(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().async_set_window_opacity(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().async_set_window_alpha_hit_threshold(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));
auto* app = Application::the();
if (app && app->hover_debugging_enabled())
update();
}
void Window::set_current_backing_store(WindowBackingStore& backing_store, bool flush_immediately)
{
auto& bitmap = backing_store.bitmap();
WindowServerConnection::the().set_window_backing_store(m_window_id, 32, bitmap.pitch(), bitmap.anonymous_buffer().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 buffer = Core::AnonymousBuffer::create_with_size(round_up_to_power_of_two(size_in_bytes, PAGE_SIZE));
if (!buffer.is_valid()) {
perror("anon_create");
return {};
}
// FIXME: Plumb scale factor here eventually.
auto bitmap = Gfx::Bitmap::try_create_with_anonymous_buffer(format, move(buffer), size, 1, {});
if (!bitmap) {
VERIFY(size.width() <= INT16_MAX);
VERIFY(size.height() <= INT16_MAX);
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_rects_change_event(ScreenRectsChangeEvent&)
{
}
void Window::applet_area_rect_change_event(AppletAreaRectChangeEvent&)
{
}
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::try_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().async_set_window_icon_bitmap(m_window_id, m_icon->to_shareable_bitmap());
}
void Window::start_interactive_resize()
{
WindowServerConnection::the().async_start_window_resize(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;
if (!child.is_auto_focusable())
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().async_set_fullscreen(m_window_id, fullscreen);
}
void Window::set_frameless(bool frameless)
{
if (m_frameless == frameless)
return;
m_frameless = frameless;
if (!is_visible())
return;
WindowServerConnection::the().async_set_frameless(m_window_id, frameless);
if (!frameless)
apply_icon();
}
void Window::set_forced_shadow(bool shadow)
{
if (m_forced_shadow == shadow)
return;
m_forced_shadow = shadow;
if (!is_visible())
return;
WindowServerConnection::the().async_set_forced_shadow(m_window_id, shadow);
}
bool Window::is_maximized() const
{
if (!is_visible())
return false;
return WindowServerConnection::the().is_maximized(m_window_id);
}
void Window::set_maximized(bool maximized)
{
VERIFY(m_window_id != 0);
WindowServerConnection::the().async_set_maximized(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().async_refresh_system_theme();
}
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 {
bool was_purged = false;
bool bitmap_has_memory = store->bitmap().set_nonvolatile(was_purged);
if (!bitmap_has_memory) {
// Not enough memory to make the bitmap non-volatile. Lose the bitmap and schedule an update.
// Let the paint system figure out what to do.
store = nullptr;
update();
} else if (was_purged) {
// The bitmap memory was purged by the kernel, but we have all-new zero-filled pages.
// Schedule an update to regenerate the bitmap.
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 || action.alternate_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().async_set_window_base_size_and_size_increment(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().async_set_window_base_size_and_size_increment(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().async_set_window_resize_aspect_ratio(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(Optional<int> progress)
{
VERIFY(m_window_id);
WindowServerConnection::the().async_set_window_progress(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().async_set_window_custom_cursor(m_window_id, m_custom_cursor->to_shareable_bitmap());
else
WindowServerConnection::the().async_set_window_cursor(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;
}
Menu& Window::add_menu(String name)
{
Menu& menu = m_menubar->add_menu({}, move(name));
if (m_window_id) {
menu.realize_menu_if_needed();
WindowServerConnection::the().async_add_menu(m_window_id, menu.menu_id());
}
return menu;
}
bool Window::is_modified() const
{
if (!m_window_id)
return false;
return WindowServerConnection::the().is_window_modified(m_window_id);
}
void Window::set_modified(bool modified)
{
if (!m_window_id)
return;
WindowServerConnection::the().async_set_window_modified(m_window_id, modified);
}
}
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