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serenity/Userland/Services/WindowServer/Menu.cpp
thankyouverycool e06f9174a1 WindowServer: Remove unused bools in Menu::draw() 
Added in d522a6f and 1e604b7, their purpose snuffed out in 11bb88f
like the faint pulse of a pleading candle, two lives of short excess,
doomed to itemize their sins to no effect and for all eternity...
2022-12-11 20:25:58 +01:00

760 lines
26 KiB
C++
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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020, Shannon Booth <shannon.ml.booth@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Menu.h"
#include "Event.h"
#include "MenuItem.h"
#include "MenuManager.h"
#include "Screen.h"
#include "Window.h"
#include "WindowManager.h"
#include <AK/CharacterTypes.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/CharacterBitmap.h>
#include <LibGfx/Font/Font.h>
#include <LibGfx/Painter.h>
#include <LibGfx/StylePainter.h>
#include <LibGfx/Triangle.h>
#include <WindowServer/ConnectionFromClient.h>
#include <WindowServer/WindowClientEndpoint.h>
namespace WindowServer {
u32 find_ampersand_shortcut_character(StringView string)
{
Utf8View utf8_view { string };
for (auto it = utf8_view.begin(); it != utf8_view.end(); ++it) {
if (*it == '&') {
++it;
if (it != utf8_view.end() && *it != '&')
return *it;
}
}
return 0;
}
Menu::Menu(ConnectionFromClient* client, int menu_id, DeprecatedString name)
: Core::Object(client)
, m_client(client)
, m_menu_id(menu_id)
, m_name(move(name))
{
m_alt_shortcut_character = find_ampersand_shortcut_character(m_name);
}
Gfx::Font const& Menu::font() const
{
return Gfx::FontDatabase::default_font();
}
static constexpr Gfx::CharacterBitmap s_submenu_arrow_bitmap {
" "
" # "
" ## "
" ### "
" #### "
" ### "
" ## "
" # "
" "sv,
9, 9
};
static constexpr int s_item_icon_width = 16;
static constexpr int s_stripe_width = 24;
int Menu::content_width() const
{
int widest_text = 0;
int widest_shortcut = 0;
for (auto& item : m_items) {
if (!item.is_visible())
continue;
if (item.type() != MenuItem::Text)
continue;
auto& use_font = item.is_default() ? font().bold_variant() : font();
int text_width = use_font.width(Gfx::parse_ampersand_string(item.text()));
if (!item.shortcut_text().is_empty()) {
int shortcut_width = use_font.width(item.shortcut_text());
widest_shortcut = max(shortcut_width, widest_shortcut);
}
widest_text = max(widest_text, text_width);
}
int widest_item = widest_text + s_stripe_width;
if (widest_shortcut)
widest_item += padding_between_text_and_shortcut() + widest_shortcut;
return max(widest_item, rect_in_window_menubar().width()) + horizontal_padding() + frame_thickness() * 2;
}
int Menu::item_height() const
{
return max(font().preferred_line_height(), s_item_icon_width + 2) + 4;
}
void Menu::redraw()
{
if (!menu_window())
return;
draw();
menu_window()->invalidate();
}
void Menu::redraw(MenuItem const& menu_item)
{
if (!menu_window())
return;
if (!menu_item.is_visible())
return;
draw(menu_item);
menu_window()->invalidate(menu_item.rect());
}
void Menu::invalidate_menu_window()
{
m_menu_window = nullptr;
}
Window& Menu::ensure_menu_window(Gfx::IntPoint position)
{
auto& screen = Screen::closest_to_location(position);
int width = this->content_width();
auto calculate_window_rect = [&]() -> Gfx::IntRect {
int window_height_available = screen.height() - frame_thickness() * 2;
int max_window_height = (window_height_available / item_height()) * item_height() + frame_thickness() * 2;
int content_height = m_items.is_empty() ? 0 : (m_items.last().rect().bottom() + 1) + frame_thickness();
int window_height = min(max_window_height, content_height);
if (window_height < content_height) {
m_scrollable = true;
m_max_scroll_offset = item_count() - window_height / item_height() + 2;
}
return { position, { width, window_height } };
};
Gfx::IntPoint next_item_location(frame_thickness(), frame_thickness());
for (auto& item : m_items) {
if (!item.is_visible())
continue;
int height = 0;
if (item.type() == MenuItem::Text)
height = item_height();
else if (item.type() == MenuItem::Separator)
height = 8;
item.set_rect({ next_item_location, { width - frame_thickness() * 2, height } });
next_item_location.translate_by(0, height);
}
if (m_menu_window) {
// We might be on a different screen than previously, so recalculate the
// menu's rectangle as we have more or less screen available now
auto new_rect = calculate_window_rect();
if (new_rect != m_menu_window->rect()) {
auto size_changed = new_rect.size() != m_menu_window->rect().size();
m_menu_window->set_rect(new_rect);
if (size_changed)
draw();
}
} else {
auto window = Window::construct(*this, WindowType::Menu);
window->set_visible(false);
window->set_rect(calculate_window_rect());
m_menu_window = move(window);
draw();
}
return *m_menu_window;
}
size_t Menu::visible_item_count() const
{
if (!is_scrollable())
return m_items.size();
VERIFY(m_menu_window);
// Make space for up/down arrow indicators
return m_menu_window->height() / item_height() - 2;
}
Gfx::IntRect Menu::stripe_rect()
{
return { frame_thickness(), frame_thickness(), s_stripe_width, menu_window()->height() - frame_thickness() * 2 };
}
void Menu::draw()
{
auto palette = WindowManager::the().palette();
m_theme_index_at_last_paint = MenuManager::the().theme_index();
VERIFY(menu_window());
// When an application has an empty menu, we don't want to draw it
if (menu_window()->backing_store() == nullptr)
return;
Gfx::Painter painter(*menu_window()->backing_store());
Gfx::IntRect rect { {}, menu_window()->size() };
painter.draw_rect(rect, Color::Black);
painter.fill_rect(rect.shrunken(2, 2), palette.menu_base());
// Draw the stripe first, which may extend outside of individual items. We can
// skip this step when painting an individual item since we're drawing all of them
painter.fill_rect(stripe_rect(), palette.menu_stripe());
if (is_scrollable()) {
bool can_go_up = m_scroll_offset > 0;
bool can_go_down = m_scroll_offset < m_max_scroll_offset;
Gfx::IntRect up_indicator_rect { frame_thickness(), frame_thickness(), content_width(), item_height() };
painter.draw_text(up_indicator_rect, "\xE2\xAC\x86"sv, Gfx::TextAlignment::Center, can_go_up ? palette.menu_base_text() : palette.color(ColorRole::DisabledText));
Gfx::IntRect down_indicator_rect { frame_thickness(), menu_window()->height() - item_height() - frame_thickness(), content_width(), item_height() };
painter.draw_text(down_indicator_rect, "\xE2\xAC\x87"sv, Gfx::TextAlignment::Center, can_go_down ? palette.menu_base_text() : palette.color(ColorRole::DisabledText));
}
int visible_item_count = this->visible_item_count();
for (int i = 0; i < visible_item_count; ++i)
draw(m_items.at(m_scroll_offset + i), true);
}
void Menu::draw(MenuItem const& item, bool is_drawing_all)
{
if (!item.is_visible())
return;
auto palette = WindowManager::the().palette();
int width = this->content_width();
Gfx::Painter painter(*menu_window()->backing_store());
painter.add_clip_rect(item.rect());
auto stripe_rect = this->stripe_rect();
if (!is_drawing_all) {
// If we're redrawing all of them then we already did this in draw()
painter.fill_rect(stripe_rect, palette.menu_stripe());
for (auto& rect : item.rect().shatter(stripe_rect))
painter.fill_rect(rect, palette.menu_base());
}
if (item.type() == MenuItem::Text) {
Color text_color = palette.menu_base_text();
if (&item == hovered_item() && item.is_enabled()) {
painter.fill_rect(item.rect(), palette.menu_selection());
painter.draw_rect(item.rect(), palette.menu_selection().darkened());
text_color = palette.menu_selection_text();
} else if (!item.is_enabled()) {
text_color = Color::MidGray;
}
Gfx::IntRect text_rect = item.rect().translated(stripe_rect.width() + 6, 0);
if (item.is_checkable()) {
if (item.is_exclusive()) {
Gfx::IntRect radio_rect { item.rect().x() + 5, 0, 12, 12 };
radio_rect.center_vertically_within(text_rect);
Gfx::StylePainter::paint_radio_button(painter, radio_rect, palette, item.is_checked(), false);
} else {
Gfx::IntRect checkbox_rect { item.rect().x() + 5, 0, 13, 13 };
checkbox_rect.center_vertically_within(text_rect);
Gfx::StylePainter::paint_check_box(painter, checkbox_rect, palette, item.is_enabled(), item.is_checked(), false);
}
} else if (item.icon()) {
Gfx::IntRect icon_rect { item.rect().x() + 3, 0, s_item_icon_width, s_item_icon_width };
icon_rect.center_vertically_within(text_rect);
if (&item == hovered_item() && item.is_enabled()) {
auto shadow_color = palette.menu_selection().darkened(0.7f);
painter.blit_filtered(icon_rect.location().translated(1, 1), *item.icon(), item.icon()->rect(), [&shadow_color](auto) {
return shadow_color;
});
icon_rect.translate_by(-1, -1);
}
if (item.is_enabled())
painter.blit(icon_rect.location(), *item.icon(), item.icon()->rect());
else
painter.blit_disabled(icon_rect.location(), *item.icon(), item.icon()->rect(), palette);
}
auto& previous_font = painter.font();
if (item.is_default())
painter.set_font(previous_font.bold_variant());
painter.draw_ui_text(text_rect, item.text(), painter.font(), Gfx::TextAlignment::CenterLeft, text_color);
if (!item.shortcut_text().is_empty()) {
painter.draw_text(item.rect().translated(-right_padding(), 0), item.shortcut_text(), Gfx::TextAlignment::CenterRight, text_color);
}
painter.set_font(previous_font);
if (item.is_submenu()) {
Gfx::IntRect submenu_arrow_rect {
item.rect().right() - static_cast<int>(s_submenu_arrow_bitmap.width()) - 2,
0,
s_submenu_arrow_bitmap.width(),
s_submenu_arrow_bitmap.height()
};
submenu_arrow_rect.center_vertically_within(item.rect());
painter.draw_bitmap(submenu_arrow_rect.location(), s_submenu_arrow_bitmap, text_color);
}
} else if (item.type() == MenuItem::Separator) {
Gfx::IntPoint p1(item.rect().translated(stripe_rect.width() + 4, 0).x(), item.rect().center().y() - 1);
Gfx::IntPoint p2(width - 7, item.rect().center().y() - 1);
painter.draw_line(p1, p2, palette.threed_shadow1());
painter.draw_line(p1.translated(0, 1), p2.translated(0, 1), palette.threed_highlight());
}
}
MenuItem* Menu::hovered_item() const
{
if (m_hovered_item_index == -1)
return nullptr;
return const_cast<MenuItem*>(&item(m_hovered_item_index));
}
void Menu::update_for_new_hovered_item(bool make_input)
{
if (auto* hovered_item = this->hovered_item()) {
if (hovered_item->is_submenu()) {
VERIFY(menu_window());
MenuManager::the().close_everyone_not_in_lineage(*hovered_item->submenu());
hovered_item->submenu()->do_popup(hovered_item->rect().top_right().translated(menu_window()->rect().location()), make_input, true);
} else {
MenuManager::the().close_everyone_not_in_lineage(*this);
VERIFY(menu_window());
set_visible(true);
}
}
}
void Menu::open_hovered_item(bool leave_menu_open)
{
VERIFY(menu_window());
VERIFY(menu_window()->is_visible());
if (!hovered_item())
return;
if (hovered_item()->is_enabled()) {
did_activate(*hovered_item(), leave_menu_open);
if (!leave_menu_open)
clear_hovered_item();
}
}
void Menu::descend_into_submenu_at_hovered_item()
{
VERIFY(hovered_item());
auto submenu = hovered_item()->submenu();
VERIFY(submenu);
MenuManager::the().open_menu(*submenu, true);
submenu->set_hovered_index(0);
VERIFY(submenu->hovered_item()->type() != MenuItem::Separator);
}
void Menu::handle_mouse_move_event(MouseEvent const& mouse_event)
{
VERIFY(menu_window());
MenuManager::the().set_current_menu(this);
if (hovered_item() && hovered_item()->is_submenu()) {
auto item = *hovered_item();
auto submenu_top_left = item.rect().location() + Gfx::IntPoint { item.rect().width(), 0 };
auto submenu_bottom_left = submenu_top_left + Gfx::IntPoint { 0, item.submenu()->menu_window()->height() };
auto safe_hover_triangle = Gfx::Triangle { m_last_position_in_hover, submenu_top_left, submenu_bottom_left };
m_last_position_in_hover = mouse_event.position();
// Don't update the hovered item if mouse is moving towards a submenu
if (safe_hover_triangle.contains(mouse_event.position()))
return;
}
int index = item_index_at(mouse_event.position());
set_hovered_index(index);
}
void Menu::event(Core::Event& event)
{
if (event.type() == Event::MouseMove) {
handle_mouse_move_event(static_cast<MouseEvent const&>(event));
return;
}
if (event.type() == Event::MouseUp) {
open_hovered_item(static_cast<MouseEvent&>(event).modifiers() & KeyModifier::Mod_Ctrl);
return;
}
if (event.type() == Event::MouseWheel && is_scrollable()) {
VERIFY(menu_window());
auto& mouse_event = static_cast<MouseEvent const&>(event);
auto previous_scroll_offset = m_scroll_offset;
m_scroll_offset += mouse_event.wheel_delta_y();
m_scroll_offset = clamp(m_scroll_offset, 0, m_max_scroll_offset);
if (m_scroll_offset != previous_scroll_offset)
redraw();
int index = item_index_at(mouse_event.position());
set_hovered_index(index);
return;
}
if (event.type() == Event::KeyDown) {
auto key = static_cast<KeyEvent&>(event).key();
if (!(key == Key_Up || key == Key_Down || key == Key_Left || key == Key_Right || key == Key_Return))
return;
VERIFY(menu_window());
VERIFY(menu_window()->is_visible());
if (!hovered_item()) {
if (key == Key_Up) {
// Default to the last enabled, non-separator item on key press if one has not been selected yet
for (auto i = static_cast<int>(m_items.size()) - 1; i >= 0; i--) {
auto& item = m_items.at(i);
if (!item.is_visible())
continue;
if (item.type() != MenuItem::Separator && item.is_enabled()) {
set_hovered_index(i, key == Key_Right);
break;
}
}
} else {
// Default to the first enabled, non-separator item on key press if one has not been selected yet
int counter = 0;
for (auto const& item : m_items) {
if (!item.is_visible())
continue;
if (item.type() != MenuItem::Separator && item.is_enabled()) {
set_hovered_index(counter, key == Key_Right);
break;
}
counter++;
}
}
return;
}
if (key == Key_Up) {
VERIFY(item(0).type() != MenuItem::Separator);
if (is_scrollable() && m_hovered_item_index == 0)
return;
auto original_index = m_hovered_item_index;
auto new_index = original_index;
do {
if (new_index == 0)
new_index = m_items.size() - 1;
else
--new_index;
if (new_index == original_index)
return;
} while (item(new_index).type() == MenuItem::Separator || !item(new_index).is_enabled() || !item(new_index).is_visible());
VERIFY(new_index >= 0);
VERIFY(new_index <= static_cast<int>(m_items.size()) - 1);
if (is_scrollable() && new_index < m_scroll_offset)
--m_scroll_offset;
set_hovered_index(new_index);
return;
}
if (key == Key_Down) {
VERIFY(item(0).type() != MenuItem::Separator);
if (is_scrollable() && m_hovered_item_index == static_cast<int>(m_items.size()) - 1)
return;
auto original_index = m_hovered_item_index;
auto new_index = original_index;
do {
if (new_index == static_cast<int>(m_items.size()) - 1)
new_index = 0;
else
++new_index;
if (new_index == original_index)
return;
} while (item(new_index).type() == MenuItem::Separator || !item(new_index).is_enabled() || !item(new_index).is_visible());
VERIFY(new_index >= 0);
VERIFY(new_index <= static_cast<int>(m_items.size()) - 1);
if (is_scrollable() && new_index >= (m_scroll_offset + static_cast<int>(visible_item_count())))
++m_scroll_offset;
set_hovered_index(new_index);
return;
}
}
Core::Object::event(event);
}
void Menu::clear_hovered_item()
{
set_hovered_index(-1);
}
void Menu::start_activation_animation(MenuItem& item)
{
if (!WindowManager::the().system_effects().animate_menus())
return;
VERIFY(menu_window());
VERIFY(menu_window()->backing_store());
auto window = Window::construct(*this, WindowType::Menu);
window->set_frameless(true);
window->set_hit_testing_enabled(false);
window->set_opacity(0.8f); // start out transparent so we don't have to recompute occlusions
window->set_rect(item.rect().translated(m_menu_window->rect().location()));
window->set_event_filter([](Core::Event&) {
// ignore all events
return false;
});
VERIFY(window->backing_store());
Gfx::Painter painter(*window->backing_store());
painter.blit({}, *menu_window()->backing_store(), item.rect(), 1.0f, false);
window->invalidate();
struct AnimationInfo {
RefPtr<Core::Timer> timer;
RefPtr<Window> window;
u8 step { 8 }; // Must be even number!
AnimationInfo(NonnullRefPtr<Window>&& window)
: window(move(window))
{
}
};
auto animation = adopt_own(*new AnimationInfo(move(window)));
auto& timer = animation->timer;
timer = Core::Timer::create_repeating(50, [animation = animation.ptr(), animation_ref = move(animation)] {
VERIFY(animation->step % 2 == 0);
animation->step -= 2;
if (animation->step == 0) {
animation->window->set_visible(false);
animation->timer->stop();
animation->timer = nullptr; // break circular reference
return;
}
float opacity = (float)animation->step / 10.0f;
animation->window->set_opacity(opacity);
});
timer->start();
}
void Menu::did_activate(MenuItem& item, bool leave_menu_open)
{
if (item.type() == MenuItem::Type::Separator)
return;
if (!leave_menu_open)
start_activation_animation(item);
if (on_item_activation)
on_item_activation(item);
if (!leave_menu_open)
MenuManager::the().close_everyone();
if (m_client)
m_client->async_menu_item_activated(m_menu_id, item.identifier());
}
bool Menu::activate_default()
{
for (auto& item : m_items) {
if (!item.is_visible())
continue;
if (item.type() == MenuItem::Type::Separator)
continue;
if (item.is_enabled() && item.is_default()) {
did_activate(item, false);
return true;
}
}
return false;
}
MenuItem* Menu::item_with_identifier(unsigned identifier)
{
for (auto& item : m_items) {
if (item.identifier() == identifier)
return &item;
}
return nullptr;
}
bool Menu::remove_item_with_identifier(unsigned identifier)
{
return m_items.remove_first_matching([&](auto& item) { return item->identifier() == identifier; });
}
int Menu::item_index_at(Gfx::IntPoint position)
{
for (int i = 0; i < static_cast<int>(m_items.size()); ++i) {
auto const& item = m_items[i];
if (!item.is_visible())
continue;
if (item.rect().contains(position))
return i;
}
return -1;
}
void Menu::close()
{
MenuManager::the().close_menu_and_descendants(*this);
}
void Menu::redraw_if_theme_changed()
{
if (m_theme_index_at_last_paint != MenuManager::the().theme_index())
redraw();
}
void Menu::open_button_menu(Gfx::IntPoint position, Gfx::IntRect const& button_rect)
{
if (is_empty())
return;
auto& screen = Screen::closest_to_location(position);
auto& window = ensure_menu_window(position);
Gfx::IntPoint adjusted_pos = position;
if (window.rect().right() > screen.width())
adjusted_pos = adjusted_pos.translated(-(window.rect().right() - screen.width()) - 1, 0);
if (window.rect().bottom() > screen.height())
adjusted_pos = adjusted_pos.translated(0, -window.rect().height() - button_rect.height() + 1);
window.set_rect(adjusted_pos.x(), adjusted_pos.y(), window.rect().width(), window.rect().height());
window.move_to(adjusted_pos);
MenuManager::the().open_menu(*this, true);
WindowManager::the().did_popup_a_menu({});
}
void Menu::popup(Gfx::IntPoint position)
{
do_popup(position, true);
}
void Menu::do_popup(Gfx::IntPoint position, bool make_input, bool as_submenu)
{
if (is_empty()) {
dbgln("Menu: Empty menu popup");
return;
}
auto& screen = Screen::closest_to_location(position);
auto& window = ensure_menu_window(position);
redraw_if_theme_changed();
constexpr auto margin = 10;
Gfx::IntPoint adjusted_pos = m_unadjusted_position = position;
if (adjusted_pos.x() + window.width() > screen.rect().right() - margin) {
// Vertically translate the window by its full width, i.e. flip it at its vertical axis.
adjusted_pos = adjusted_pos.translated(-window.width(), 0);
// If the window is a submenu, translate to the opposite side of its immediate ancestor
if (auto* ancestor = MenuManager::the().closest_open_ancestor_of(*this); ancestor && as_submenu) {
constexpr auto offset = 1 + frame_thickness() * 2;
adjusted_pos = adjusted_pos.translated(-ancestor->menu_window()->width() + offset, 0);
}
} else {
// Even if no adjustment needs to be done, move the menu to the right by 1px so it's not
// underneath the cursor and can be closed by another click at the same position.
adjusted_pos.set_x(adjusted_pos.x() + 1);
}
if (adjusted_pos.y() + window.height() > screen.rect().bottom() - margin) {
// Vertically translate the window by its full height, i.e. flip it at its horizontal axis.
auto offset = window.height();
// ...but if it's a submenu, go back by one menu item height to keep the menu aligned with
// its parent item, if possible.
if (as_submenu)
offset -= item_height();
// Before translating, clamp the calculated offset to the current distance between the
// screen and menu top edges to avoid going off-screen.
adjusted_pos = adjusted_pos.translated(0, -min(offset, adjusted_pos.y()));
}
window.move_to(adjusted_pos);
MenuManager::the().open_menu(*this, make_input);
WindowManager::the().did_popup_a_menu({});
}
bool Menu::is_menu_ancestor_of(Menu const& other) const
{
for (auto& item : m_items) {
if (!item.is_submenu())
continue;
auto& submenu = *item.submenu();
if (&submenu == &other)
return true;
if (submenu.is_menu_ancestor_of(other))
return true;
}
return false;
}
void Menu::set_visible(bool visible)
{
if (!menu_window())
return;
if (visible == menu_window()->is_visible())
return;
menu_window()->set_visible(visible);
if (m_client)
m_client->async_menu_visibility_did_change(m_menu_id, visible);
}
void Menu::update_alt_shortcuts_for_items()
{
m_alt_shortcut_character_to_item_indices.clear();
int i = 0;
for (auto& item : m_items) {
if (auto alt_shortcut = find_ampersand_shortcut_character(item.text())) {
m_alt_shortcut_character_to_item_indices.ensure(to_ascii_lowercase(alt_shortcut)).append(i);
}
++i;
}
}
void Menu::add_item(NonnullOwnPtr<MenuItem> item)
{
m_items.append(move(item));
update_alt_shortcuts_for_items();
}
Vector<size_t> const* Menu::items_with_alt_shortcut(u32 alt_shortcut) const
{
auto it = m_alt_shortcut_character_to_item_indices.find(to_ascii_lowercase(alt_shortcut));
if (it == m_alt_shortcut_character_to_item_indices.end())
return nullptr;
return &it->value;
}
void Menu::set_hovered_index(int index, bool make_input)
{
if (m_hovered_item_index == index)
return;
auto* old_hovered_item = hovered_item();
if (old_hovered_item) {
if (client() && old_hovered_item->type() != MenuItem::Type::Separator)
client()->async_menu_item_left(m_menu_id, old_hovered_item->identifier());
}
m_hovered_item_index = index;
update_for_new_hovered_item(make_input);
if (auto* new_hovered_item = hovered_item()) {
if (client() && new_hovered_item->type() != MenuItem::Type::Separator)
client()->async_menu_item_entered(m_menu_id, new_hovered_item->identifier());
redraw(*new_hovered_item);
}
if (old_hovered_item)
redraw(*old_hovered_item);
}
bool Menu::is_open() const
{
return MenuManager::the().is_open(*this);
}
}
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