0ct0pu5
/
ladybird


			
				
					
						
						
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							/*
 * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "OutOfProcessWebView.h"
#include "WebContentClient.h"
#include <AK/DeprecatedString.h>
#include <LibFileSystemAccessClient/Client.h>
#include <LibGUI/Application.h>
#include <LibGUI/Desktop.h>
#include <LibGUI/Dialog.h>
#include <LibGUI/InputBox.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Scrollbar.h>
#include <LibGUI/Window.h>
#include <LibGfx/Font/FontDatabase.h>
#include <LibGfx/Palette.h>
#include <LibGfx/SystemTheme.h>

REGISTER_WIDGET(WebView, OutOfProcessWebView)

namespace WebView {

OutOfProcessWebView::OutOfProcessWebView()
{
    set_should_hide_unnecessary_scrollbars(true);
    set_focus_policy(GUI::FocusPolicy::StrongFocus);

    create_client();
}

OutOfProcessWebView::~OutOfProcessWebView() = default;

void OutOfProcessWebView::handle_web_content_process_crash()
{
    create_client();
    VERIFY(m_client_state.client);

    // Don't keep a stale backup bitmap around.
    m_backup_bitmap = nullptr;

    handle_resize();
    StringBuilder builder;
    builder.append("<html><head><title>Crashed: "sv);
    builder.append(escape_html_entities(m_url.to_deprecated_string()));
    builder.append("</title></head><body>"sv);
    builder.append("<h1>Web page crashed"sv);
    if (!m_url.host().is_empty()) {
        builder.appendff(" on {}", escape_html_entities(m_url.host()));
    }
    builder.append("</h1>"sv);
    auto escaped_url = escape_html_entities(m_url.to_deprecated_string());
    builder.appendff("The web page <a href=\"{}\">{}</a> has crashed.<br><br>You can reload the page to try again.", escaped_url, escaped_url);
    builder.append("</body></html>"sv);
    load_html(builder.to_deprecated_string(), m_url);
}

void OutOfProcessWebView::create_client()
{
    m_client_state = {};

    m_client_state.client = WebContentClient::try_create(*this).release_value_but_fixme_should_propagate_errors();
    m_client_state.client->on_web_content_process_crash = [this] {
        deferred_invoke([this] {
            handle_web_content_process_crash();
        });
    };

    client().async_update_system_theme(Gfx::current_system_theme_buffer());
    client().async_update_system_fonts(Gfx::FontDatabase::default_font_query(), Gfx::FontDatabase::fixed_width_font_query(), Gfx::FontDatabase::window_title_font_query());
    client().async_update_screen_rects(GUI::Desktop::the().rects(), GUI::Desktop::the().main_screen_index());
}

void OutOfProcessWebView::load(const AK::URL& url)
{
    m_url = url;
    client().async_load_url(url);
}

void OutOfProcessWebView::load_html(StringView html, const AK::URL& url)
{
    m_url = url;
    client().async_load_html(html, url);
}

void OutOfProcessWebView::load_empty_document()
{
    m_url = {};
    client().async_load_html("", {});
}

void OutOfProcessWebView::paint_event(GUI::PaintEvent& event)
{
    Super::paint_event(event);

    // If the available size is empty, we don't have a front or back bitmap to draw.
    if (available_size().is_empty())
        return;

    GUI::Painter painter(*this);
    painter.add_clip_rect(event.rect());

    if (auto* bitmap = m_client_state.has_usable_bitmap ? m_client_state.front_bitmap.bitmap.ptr() : m_backup_bitmap.ptr()) {
        painter.add_clip_rect(frame_inner_rect());
        painter.translate(frame_thickness(), frame_thickness());
        if (m_content_scales_to_viewport)
            painter.draw_scaled_bitmap(rect(), *bitmap, bitmap->rect());
        else
            painter.blit({ 0, 0 }, *bitmap, bitmap->rect());
        return;
    }

    painter.fill_rect(frame_inner_rect(), palette().base());
}

void OutOfProcessWebView::resize_event(GUI::ResizeEvent& event)
{
    Super::resize_event(event);
    handle_resize();
}

void OutOfProcessWebView::handle_resize()
{
    client().async_set_viewport_rect(Gfx::IntRect({ horizontal_scrollbar().value(), vertical_scrollbar().value() }, available_size()));

    if (m_client_state.has_usable_bitmap) {
        // NOTE: We keep the outgoing front bitmap as a backup so we have something to paint until we get a new one.
        m_backup_bitmap = m_client_state.front_bitmap.bitmap;
    }

    if (m_client_state.front_bitmap.bitmap)
        client().async_remove_backing_store(m_client_state.front_bitmap.id);

    if (m_client_state.back_bitmap.bitmap)
        client().async_remove_backing_store(m_client_state.back_bitmap.id);

    m_client_state.front_bitmap = {};
    m_client_state.back_bitmap = {};
    m_client_state.has_usable_bitmap = false;

    if (available_size().is_empty())
        return;

    if (auto new_bitmap_or_error = Gfx::Bitmap::try_create_shareable(Gfx::BitmapFormat::BGRx8888, available_size()); !new_bitmap_or_error.is_error()) {
        m_client_state.front_bitmap.bitmap = new_bitmap_or_error.release_value();
        m_client_state.front_bitmap.id = m_client_state.next_bitmap_id++;
        client().async_add_backing_store(m_client_state.front_bitmap.id, m_client_state.front_bitmap.bitmap->to_shareable_bitmap());
    }

    if (auto new_bitmap_or_error = Gfx::Bitmap::try_create_shareable(Gfx::BitmapFormat::BGRx8888, available_size()); !new_bitmap_or_error.is_error()) {
        m_client_state.back_bitmap.bitmap = new_bitmap_or_error.release_value();
        m_client_state.back_bitmap.id = m_client_state.next_bitmap_id++;
        client().async_add_backing_store(m_client_state.back_bitmap.id, m_client_state.back_bitmap.bitmap->to_shareable_bitmap());
    }

    request_repaint();
}

void OutOfProcessWebView::zoom_in()
{
    if (m_zoom_level >= ZOOM_MAX_LEVEL)
        return;
    m_zoom_level += ZOOM_STEP;
    update_zoom();
}

void OutOfProcessWebView::zoom_out()
{
    if (m_zoom_level <= ZOOM_MIN_LEVEL)
        return;
    m_zoom_level -= ZOOM_STEP;
    update_zoom();
}

void OutOfProcessWebView::reset_zoom()
{
    m_zoom_level = 1.0f;
    update_zoom();
}

void OutOfProcessWebView::update_zoom()
{
    client().async_set_device_pixels_per_css_pixel(m_device_pixel_ratio * m_zoom_level);
    // FIXME: Refactor this into separate update_viewport_rect() + request_repaint() like in Ladybird
    handle_resize();
}

void OutOfProcessWebView::keydown_event(GUI::KeyEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::keyup_event(GUI::KeyEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::mousedown_event(GUI::MouseEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::mouseup_event(GUI::MouseEvent& event)
{
    enqueue_input_event(event);

    if (event.button() == GUI::MouseButton::Backward && on_back_button) {
        on_back_button();
    } else if (event.button() == GUI::MouseButton::Forward && on_forward_button) {
        on_forward_button();
    }
}

void OutOfProcessWebView::mousemove_event(GUI::MouseEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::mousewheel_event(GUI::MouseEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::doubleclick_event(GUI::MouseEvent& event)
{
    enqueue_input_event(event);
}

void OutOfProcessWebView::theme_change_event(GUI::ThemeChangeEvent& event)
{
    Super::theme_change_event(event);
    client().async_update_system_theme(Gfx::current_system_theme_buffer());
    request_repaint();
}

void OutOfProcessWebView::screen_rects_change_event(GUI::ScreenRectsChangeEvent& event)
{
    client().async_update_screen_rects(event.rects(), event.main_screen_index());
}

void OutOfProcessWebView::notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id)
{
    if (m_client_state.back_bitmap.id == bitmap_id) {
        m_client_state.has_usable_bitmap = true;
        m_client_state.back_bitmap.pending_paints--;
        swap(m_client_state.back_bitmap, m_client_state.front_bitmap);
        // We don't need the backup bitmap anymore, so drop it.
        m_backup_bitmap = nullptr;
        update();

        if (m_client_state.got_repaint_requests_while_painting) {
            m_client_state.got_repaint_requests_while_painting = false;
            request_repaint();
        }
    }
}

void OutOfProcessWebView::notify_server_did_invalidate_content_rect(Badge<WebContentClient>, [[maybe_unused]] Gfx::IntRect const& content_rect)
{
    request_repaint();
}

void OutOfProcessWebView::notify_server_did_change_selection(Badge<WebContentClient>)
{
    request_repaint();
}

void OutOfProcessWebView::notify_server_did_request_cursor_change(Badge<WebContentClient>, Gfx::StandardCursor cursor)
{
    set_override_cursor(cursor);
}

void OutOfProcessWebView::notify_server_did_layout(Badge<WebContentClient>, Gfx::IntSize content_size)
{
    set_content_size(content_size);
}

void OutOfProcessWebView::notify_server_did_change_title(Badge<WebContentClient>, DeprecatedString const& title)
{
    if (on_title_change)
        on_title_change(title);
}

void OutOfProcessWebView::notify_server_did_request_scroll(Badge<WebContentClient>, i32 x_delta, i32 y_delta)
{
    horizontal_scrollbar().increase_slider_by(x_delta);
    vertical_scrollbar().increase_slider_by(y_delta);
}

void OutOfProcessWebView::notify_server_did_request_scroll_to(Badge<WebContentClient>, Gfx::IntPoint scroll_position)
{
    horizontal_scrollbar().set_value(scroll_position.x());
    vertical_scrollbar().set_value(scroll_position.y());
}

void OutOfProcessWebView::notify_server_did_request_scroll_into_view(Badge<WebContentClient>, Gfx::IntRect const& rect)
{
    scroll_into_view(rect, true, true);
}

void OutOfProcessWebView::notify_server_did_enter_tooltip_area(Badge<WebContentClient>, Gfx::IntPoint, DeprecatedString const& title)
{
    GUI::Application::the()->show_tooltip(title, nullptr);
}

void OutOfProcessWebView::notify_server_did_leave_tooltip_area(Badge<WebContentClient>)
{
    GUI::Application::the()->hide_tooltip();
}

void OutOfProcessWebView::notify_server_did_hover_link(Badge<WebContentClient>, const AK::URL& url)
{
    if (on_link_hover)
        on_link_hover(url);
}

void OutOfProcessWebView::notify_server_did_unhover_link(Badge<WebContentClient>)
{
    set_override_cursor(Gfx::StandardCursor::None);
    if (on_link_hover)
        on_link_hover({});
}

void OutOfProcessWebView::notify_server_did_click_link(Badge<WebContentClient>, const AK::URL& url, DeprecatedString const& target, unsigned int modifiers)
{
    if (on_link_click)
        on_link_click(url, target, modifiers);
}

void OutOfProcessWebView::notify_server_did_middle_click_link(Badge<WebContentClient>, const AK::URL& url, DeprecatedString const& target, unsigned int modifiers)
{
    if (on_link_middle_click)
        on_link_middle_click(url, target, modifiers);
}

void OutOfProcessWebView::notify_server_did_start_loading(Badge<WebContentClient>, const AK::URL& url, bool is_redirect)
{
    m_url = url;
    if (on_load_start)
        on_load_start(url, is_redirect);
}

void OutOfProcessWebView::notify_server_did_finish_loading(Badge<WebContentClient>, const AK::URL& url)
{
    m_url = url;
    if (on_load_finish)
        on_load_finish(url);
}

void OutOfProcessWebView::notify_server_did_request_navigate_back(Badge<WebContentClient>)
{
    if (on_navigate_back)
        on_navigate_back();
}

void OutOfProcessWebView::notify_server_did_request_navigate_forward(Badge<WebContentClient>)
{
    if (on_navigate_forward)
        on_navigate_forward();
}

void OutOfProcessWebView::notify_server_did_request_refresh(Badge<WebContentClient>)
{
    if (on_refresh)
        on_refresh();
}

void OutOfProcessWebView::notify_server_did_request_context_menu(Badge<WebContentClient>, Gfx::IntPoint content_position)
{
    if (on_context_menu_request)
        on_context_menu_request(screen_relative_rect().location().translated(to_widget_position(content_position)));
}

void OutOfProcessWebView::notify_server_did_request_link_context_menu(Badge<WebContentClient>, Gfx::IntPoint content_position, const AK::URL& url, DeprecatedString const&, unsigned)
{
    if (on_link_context_menu_request)
        on_link_context_menu_request(url, screen_relative_rect().location().translated(to_widget_position(content_position)));
}

void OutOfProcessWebView::notify_server_did_request_image_context_menu(Badge<WebContentClient>, Gfx::IntPoint content_position, const AK::URL& url, DeprecatedString const&, unsigned, Gfx::ShareableBitmap const& bitmap)
{
    if (on_image_context_menu_request)
        on_image_context_menu_request(url, screen_relative_rect().location().translated(to_widget_position(content_position)), bitmap);
}

void OutOfProcessWebView::notify_server_did_request_alert(Badge<WebContentClient>, DeprecatedString const& message)
{
    m_dialog = GUI::MessageBox::construct(window(), message, "Alert"sv, GUI::MessageBox::Type::Information, GUI::MessageBox::InputType::OK);
    m_dialog->set_icon(window()->icon());
    m_dialog->exec();

    client().async_alert_closed();
    m_dialog = nullptr;
}

void OutOfProcessWebView::notify_server_did_request_confirm(Badge<WebContentClient>, DeprecatedString const& message)
{
    m_dialog = GUI::MessageBox::construct(window(), message, "Confirm"sv, GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OKCancel);
    m_dialog->set_icon(window()->icon());

    client().async_confirm_closed(m_dialog->exec() == GUI::Dialog::ExecResult::OK);
    m_dialog = nullptr;
}

void OutOfProcessWebView::notify_server_did_request_prompt(Badge<WebContentClient>, DeprecatedString const& message, DeprecatedString const& default_)
{
    m_dialog = GUI::InputBox::construct(window(), default_, message, "Prompt"sv, StringView {}, GUI::InputType::Text);
    m_dialog->set_icon(window()->icon());

    if (m_dialog->exec() == GUI::InputBox::ExecResult::OK)
        client().async_prompt_closed(static_cast<GUI::InputBox&>(*m_dialog).text_value());
    else
        client().async_prompt_closed({});

    m_dialog = nullptr;
}

void OutOfProcessWebView::notify_server_did_request_set_prompt_text(Badge<WebContentClient>, DeprecatedString const& message)
{
    if (m_dialog && is<GUI::InputBox>(*m_dialog))
        static_cast<GUI::InputBox&>(*m_dialog).set_text_value(message);
}

void OutOfProcessWebView::notify_server_did_request_accept_dialog(Badge<WebContentClient>)
{
    if (m_dialog)
        m_dialog->done(GUI::Dialog::ExecResult::OK);
}

void OutOfProcessWebView::notify_server_did_request_dismiss_dialog(Badge<WebContentClient>)
{
    if (m_dialog)
        m_dialog->done(GUI::Dialog::ExecResult::Cancel);
}

void OutOfProcessWebView::notify_server_did_get_source(const AK::URL& url, DeprecatedString const& source)
{
    if (on_get_source)
        on_get_source(url, source);
}

void OutOfProcessWebView::notify_server_did_get_dom_tree(DeprecatedString const& dom_tree)
{
    if (on_get_dom_tree)
        on_get_dom_tree(dom_tree);
}

void OutOfProcessWebView::notify_server_did_get_dom_node_properties(i32 node_id, DeprecatedString const& computed_style, DeprecatedString const& resolved_style, DeprecatedString const& custom_properties, DeprecatedString const& node_box_sizing)
{
    if (on_get_dom_node_properties)
        on_get_dom_node_properties(node_id, computed_style, resolved_style, custom_properties, node_box_sizing);
}

void OutOfProcessWebView::notify_server_did_output_js_console_message(i32 message_index)
{
    if (on_js_console_new_message)
        on_js_console_new_message(message_index);
}

void OutOfProcessWebView::notify_server_did_get_js_console_messages(i32 start_index, Vector<DeprecatedString> const& message_types, Vector<DeprecatedString> const& messages)
{
    if (on_get_js_console_messages)
        on_get_js_console_messages(start_index, message_types, messages);
}

void OutOfProcessWebView::notify_server_did_change_favicon(Gfx::Bitmap const& favicon)
{
    if (on_favicon_change)
        on_favicon_change(favicon);
}

Vector<Web::Cookie::Cookie> OutOfProcessWebView::notify_server_did_request_all_cookies(Badge<WebContentClient>, AK::URL const& url)
{
    if (on_get_all_cookies)
        return on_get_all_cookies(url);
    return {};
}

Optional<Web::Cookie::Cookie> OutOfProcessWebView::notify_server_did_request_named_cookie(Badge<WebContentClient>, AK::URL const& url, DeprecatedString const& name)
{
    if (on_get_named_cookie)
        return on_get_named_cookie(url, name);
    return {};
}

DeprecatedString OutOfProcessWebView::notify_server_did_request_cookie(Badge<WebContentClient>, const AK::URL& url, Web::Cookie::Source source)
{
    if (on_get_cookie)
        return on_get_cookie(url, source);
    return {};
}

void OutOfProcessWebView::notify_server_did_set_cookie(Badge<WebContentClient>, const AK::URL& url, Web::Cookie::ParsedCookie const& cookie, Web::Cookie::Source source)
{
    if (on_set_cookie)
        on_set_cookie(url, cookie, source);
}

void OutOfProcessWebView::notify_server_did_update_cookie(Badge<WebContentClient>, Web::Cookie::Cookie const& cookie)
{
    if (on_update_cookie)
        on_update_cookie(cookie);
}

void OutOfProcessWebView::notify_server_did_update_resource_count(i32 count_waiting)
{
    if (on_resource_status_change)
        on_resource_status_change(count_waiting);
}

void OutOfProcessWebView::notify_server_did_request_restore_window()
{
    if (on_restore_window)
        on_restore_window();
}

Gfx::IntPoint OutOfProcessWebView::notify_server_did_request_reposition_window(Gfx::IntPoint position)
{
    if (on_reposition_window)
        return on_reposition_window(position);
    return {};
}

Gfx::IntSize OutOfProcessWebView::notify_server_did_request_resize_window(Gfx::IntSize size)
{
    if (on_resize_window)
        return on_resize_window(size);
    return {};
}

Gfx::IntRect OutOfProcessWebView::notify_server_did_request_maximize_window()
{
    if (on_maximize_window)
        return on_maximize_window();
    return {};
}

Gfx::IntRect OutOfProcessWebView::notify_server_did_request_minimize_window()
{
    if (on_minimize_window)
        return on_minimize_window();
    return {};
}

Gfx::IntRect OutOfProcessWebView::notify_server_did_request_fullscreen_window()
{
    if (on_fullscreen_window)
        return on_fullscreen_window();
    return {};
}

void OutOfProcessWebView::notify_server_did_request_file(Badge<WebContentClient>, DeprecatedString const& path, i32 request_id)
{
    auto file = FileSystemAccessClient::Client::the().request_file_read_only_approved(window(), path);
    if (file.is_error())
        client().async_handle_file_return(file.error().code(), {}, request_id);
    else
        client().async_handle_file_return(0, IPC::File(file.value().stream()), request_id);
}

void OutOfProcessWebView::did_scroll()
{
    client().async_set_viewport_rect(visible_content_rect());
    request_repaint();
}

void OutOfProcessWebView::request_repaint()
{
    // If this widget was instantiated but not yet added to a window,
    // it won't have a back bitmap yet, so we can just skip repaint requests.
    if (!m_client_state.back_bitmap.bitmap)
        return;
    // Don't request a repaint until pending paint requests have finished.
    if (m_client_state.back_bitmap.pending_paints) {
        m_client_state.got_repaint_requests_while_painting = true;
        return;
    }
    m_client_state.back_bitmap.pending_paints++;
    client().async_paint(m_client_state.back_bitmap.bitmap->rect().translated(horizontal_scrollbar().value(), vertical_scrollbar().value()), m_client_state.back_bitmap.id);
}

WebContentClient& OutOfProcessWebView::client()
{
    VERIFY(m_client_state.client);
    return *m_client_state.client;
}

void OutOfProcessWebView::debug_request(DeprecatedString const& request, DeprecatedString const& argument)
{
    client().async_debug_request(request, argument);
}

void OutOfProcessWebView::get_source()
{
    client().async_get_source();
}

void OutOfProcessWebView::inspect_dom_tree()
{
    client().async_inspect_dom_tree();
}

Optional<OutOfProcessWebView::DOMNodeProperties> OutOfProcessWebView::inspect_dom_node(i32 node_id, Optional<Web::CSS::Selector::PseudoElement> pseudo_element)
{
    auto response = client().inspect_dom_node(node_id, pseudo_element);
    if (!response.has_style())
        return {};
    return DOMNodeProperties {
        .computed_values_json = response.computed_style(),
        .resolved_values_json = response.resolved_style(),
        .custom_properties_json = response.custom_properties(),
        .node_box_sizing_json = response.node_box_sizing()
    };
}

void OutOfProcessWebView::clear_inspected_dom_node()
{
    client().inspect_dom_node(0, {});
}

i32 OutOfProcessWebView::get_hovered_node_id()
{
    return client().get_hovered_node_id();
}

void OutOfProcessWebView::js_console_input(DeprecatedString const& js_source)
{
    client().async_js_console_input(js_source);
}

void OutOfProcessWebView::js_console_request_messages(i32 start_index)
{
    client().async_js_console_request_messages(start_index);
}

void OutOfProcessWebView::run_javascript(StringView js_source)
{
    client().async_run_javascript(js_source);
}

DeprecatedString OutOfProcessWebView::selected_text()
{
    return client().get_selected_text();
}

void OutOfProcessWebView::select_all()
{
    client().async_select_all();
}

DeprecatedString OutOfProcessWebView::dump_layout_tree()
{
    return client().dump_layout_tree();
}

OrderedHashMap<DeprecatedString, DeprecatedString> OutOfProcessWebView::get_local_storage_entries()
{
    return client().get_local_storage_entries();
}

OrderedHashMap<DeprecatedString, DeprecatedString> OutOfProcessWebView::get_session_storage_entries()
{
    return client().get_session_storage_entries();
}

void OutOfProcessWebView::set_content_filters(Vector<DeprecatedString> filters)
{
    client().async_set_content_filters(filters);
}

void OutOfProcessWebView::set_proxy_mappings(Vector<DeprecatedString> proxies, HashMap<DeprecatedString, size_t> mappings)
{
    client().async_set_proxy_mappings(move(proxies), move(mappings));
}

void OutOfProcessWebView::set_preferred_color_scheme(Web::CSS::PreferredColorScheme color_scheme)
{
    client().async_set_preferred_color_scheme(color_scheme);
}

void OutOfProcessWebView::connect_to_webdriver(DeprecatedString const& webdriver_ipc_path)
{
    client().async_connect_to_webdriver(webdriver_ipc_path);
}

void OutOfProcessWebView::set_window_position(Gfx::IntPoint position)
{
    client().async_set_window_position(position);
}

void OutOfProcessWebView::set_window_size(Gfx::IntSize size)
{
    client().async_set_window_size(size);
}

Gfx::ShareableBitmap OutOfProcessWebView::take_screenshot() const
{
    if (auto* bitmap = m_client_state.has_usable_bitmap ? m_client_state.front_bitmap.bitmap.ptr() : m_backup_bitmap.ptr())
        return bitmap->to_shareable_bitmap();
    return {};
}

Gfx::ShareableBitmap OutOfProcessWebView::take_document_screenshot()
{
    return client().take_document_screenshot();
}

void OutOfProcessWebView::focusin_event(GUI::FocusEvent&)
{
    client().async_set_has_focus(true);
}

void OutOfProcessWebView::focusout_event(GUI::FocusEvent&)
{
    client().async_set_has_focus(false);
}

void OutOfProcessWebView::set_system_visibility_state(bool visible)
{
    client().async_set_system_visibility_state(visible);
}

void OutOfProcessWebView::show_event(GUI::ShowEvent&)
{
    set_system_visibility_state(true);
}

void OutOfProcessWebView::hide_event(GUI::HideEvent&)
{
    set_system_visibility_state(false);
}

void OutOfProcessWebView::enqueue_input_event(InputEvent const& event)
{
    m_pending_input_events.enqueue(event);
    process_next_input_event();
}

void OutOfProcessWebView::process_next_input_event()
{
    if (m_pending_input_events.is_empty())
        return;

    if (m_is_awaiting_response_for_input_event)
        return;
    m_is_awaiting_response_for_input_event = true;

    // Send the next event over to the web content to be handled by JS.
    // We'll later get a message to say whether JS prevented the default event behavior,
    // at which point we either discard or handle that event, then try and process the next one.
    auto event = m_pending_input_events.head();
    event.visit(
        [this](GUI::KeyEvent const& event) {
            switch (event.type()) {
            case GUI::Event::Type::KeyDown:
                client().async_key_down(event.key(), event.modifiers(), event.code_point());
                break;
            case GUI::Event::Type::KeyUp:
                client().async_key_up(event.key(), event.modifiers(), event.code_point());
                break;
            default:
                dbgln("Unrecognized key event type in OOPWV input event queue: {}", event.type());
                VERIFY_NOT_REACHED();
            }
        },
        [this](GUI::MouseEvent const& event) {
            switch (event.type()) {
            case GUI::Event::Type::MouseDown:
                client().async_mouse_down(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
                break;
            case GUI::Event::Type::MouseUp:
                client().async_mouse_up(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
                break;
            case GUI::Event::Type::MouseMove:
                client().async_mouse_move(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
                break;
            case GUI::Event::Type::MouseWheel:
                client().async_mouse_wheel(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers(), event.wheel_delta_x(), event.wheel_delta_y());
                break;
            case GUI::Event::Type::MouseDoubleClick:
                client().async_doubleclick(to_content_position(event.position()), event.button(), event.buttons(), event.modifiers());
                break;
            default:
                dbgln("Unrecognized mouse event type in OOPWV input event queue: {}", event.type());
                VERIFY_NOT_REACHED();
            }
        });
}

void OutOfProcessWebView::notify_server_did_finish_handling_input_event(bool event_was_accepted)
{
    VERIFY(m_is_awaiting_response_for_input_event);

    auto event = m_pending_input_events.dequeue();
    m_is_awaiting_response_for_input_event = false;

    if (!event_was_accepted) {
        // Here we handle events that were not consumed or cancelled by web content.
        // That is, we manually implement the steps that would have happened if the original
        // OutOfProcessWebView::foo_event() had called event.ignore().
        //
        // The first step is to give our superclass a chance to handle the event.
        //
        // Then, if it does not, we dispatch the event to our parent widget, but limited so
        // that it will never bubble up to the Window. (Otherwise, it would then dispatch the
        // event to us since we are the focused widget, and it would go round indefinitely.)
        //
        // Finally, any unhandled KeyDown events are propagated to trigger any Actions.
        event.visit(
            [this](GUI::KeyEvent& event) {
                switch (event.type()) {
                case GUI::Event::Type::KeyDown:
                    Super::keydown_event(event);
                    break;
                case GUI::Event::Type::KeyUp:
                    Super::keyup_event(event);
                    break;
                default:
                    dbgln("Unhandled key event type in OOPWV input event queue: {}", event.type());
                    VERIFY_NOT_REACHED();
                }

                if (!event.is_accepted()) {
                    parent_widget()->dispatch_event(event, window());

                    // NOTE: If other events can ever trigger shortcuts, propagate those here.
                    if (!event.is_accepted() && event.type() == GUI::Event::Type::KeyDown)
                        window()->propagate_shortcuts_up_to_application(event, this);
                }
            },
            [this](GUI::MouseEvent& event) {
                switch (event.type()) {
                case GUI::Event::Type::MouseDown:
                    Super::mousedown_event(event);
                    break;
                case GUI::Event::Type::MouseUp:
                    Super::mouseup_event(event);
                    break;
                case GUI::Event::Type::MouseMove:
                    Super::mousemove_event(event);
                    break;
                case GUI::Event::Type::MouseWheel:
                    Super::mousewheel_event(event);
                    break;
                case GUI::Event::Type::MouseDoubleClick:
                    Super::doubleclick_event(event);
                    break;
                default:
                    dbgln("Unhandled mouse event type in OOPWV input event queue: {}", event.type());
                    VERIFY_NOT_REACHED();
                }

                if (!event.is_accepted())
                    parent_widget()->dispatch_event(event, window());
                // FIXME: Propagate event for mouse-button shortcuts once that is implemented.
            });
    }

    process_next_input_event();
}

void OutOfProcessWebView::inspect_accessibility_tree()
{
    client().async_inspect_accessibility_tree();
}

void OutOfProcessWebView::notify_server_did_get_accessibility_tree(DeprecatedString const& accessibility_tree)
{
    if (on_get_accessibility_tree)
        on_get_accessibility_tree(accessibility_tree);
}

void OutOfProcessWebView::set_content_scales_to_viewport(bool b)
{
    m_content_scales_to_viewport = b;
}

}