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serenity/Ladybird/WebContentView.h
Andreas Kling 26a7ea0e0f Ladybird: Render web content in a separate process :^) 
This patch brings over the WebContent process over from SerenityOS
to Ladybird, along with a new WebContentView widget that renders
web content in a separate process.

There's a lot of jank and FIXME material here, notably I had to re-add
manually pumped Core::EventLoop instances on both sides, in order to get
the IPC protocol running. This introduces a lot of latency and we should
work towards replacing those loops with improved abstractions.

The WebContent process is built separately here (not part of Lagom) and
we provide our own main.cpp for it. Like everything, this can be better
architected, it's just a starting point. :^)
2022-12-25 07:58:58 -07:00

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/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#define AK_DONT_REPLACE_STD
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/OwnPtr.h>
#include <AK/String.h>
#include <AK/URL.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Rect.h>
#include <LibGfx/StandardCursor.h>
#include <LibWebView/ViewImplementation.h>
#include <LibWeb/Forward.h>
#include <QAbstractScrollArea>
#include <QPointer>
class QTextEdit;
class QLineEdit;
namespace WebView {
class WebContentClient;
}
using WebView::WebContentClient;
enum class ColorScheme {
Auto,
Light,
Dark,
};
class Tab;
class WebContentView final
: public QAbstractScrollArea
, public WebView::ViewImplementation {
Q_OBJECT
public:
WebContentView();
virtual ~WebContentView() override;
void load(AK::URL const&);
void load_html(StringView html, AK::URL const&);
void reload();
Function<void(Gfx::IntPoint const& screen_position)> on_context_menu_request;
Function<void(const AK::URL&, String const& target, unsigned modifiers)> on_link_click;
Function<void(const AK::URL&, Gfx::IntPoint const& screen_position)> on_link_context_menu_request;
Function<void(const AK::URL&, Gfx::IntPoint const& screen_position, Gfx::ShareableBitmap const&)> on_image_context_menu_request;
Function<void(const AK::URL&, String const& target, unsigned modifiers)> on_link_middle_click;
Function<void(const AK::URL&)> on_link_hover;
Function<void(String const&)> on_title_change;
Function<void(const AK::URL&)> on_load_start;
Function<void(const AK::URL&)> on_load_finish;
Function<void(Gfx::Bitmap const&)> on_favicon_change;
Function<void(const AK::URL&)> on_url_drop;
Function<void(Web::DOM::Document*)> on_set_document;
Function<void(const AK::URL&, String const&)> on_get_source;
Function<void(String const&)> on_get_dom_tree;
Function<void(i32 node_id, String const& specified_style, String const& computed_style, String const& custom_properties, String const& node_box_sizing)> on_get_dom_node_properties;
Function<void(i32 message_id)> on_js_console_new_message;
Function<void(i32 start_index, Vector<String> const& message_types, Vector<String> const& messages)> on_get_js_console_messages;
Function<String(const AK::URL& url, Web::Cookie::Source source)> on_get_cookie;
Function<void(const AK::URL& url, Web::Cookie::ParsedCookie const& cookie, Web::Cookie::Source source)> on_set_cookie;
Function<void(i32 count_waiting)> on_resource_status_change;
virtual void paintEvent(QPaintEvent*) override;
virtual void resizeEvent(QResizeEvent*) override;
virtual void mouseMoveEvent(QMouseEvent*) override;
virtual void mousePressEvent(QMouseEvent*) override;
virtual void mouseReleaseEvent(QMouseEvent*) override;
virtual void keyPressEvent(QKeyEvent* event) override;
virtual void keyReleaseEvent(QKeyEvent* event) override;
virtual void showEvent(QShowEvent*) override;
virtual void hideEvent(QHideEvent*) override;
void debug_request(String const& request, String const& argument);
void get_source();
void run_javascript(String const& js_source);
void did_output_js_console_message(i32 message_index);
void did_get_js_console_messages(i32 start_index, Vector<String> message_types, Vector<String> messages);
void show_js_console();
void show_inspector();
Gfx::IntPoint to_content(Gfx::IntPoint) const;
Gfx::IntPoint to_widget(Gfx::IntPoint) const;
void set_color_scheme(ColorScheme);
virtual void notify_server_did_layout(Badge<WebContentClient>, Gfx::IntSize const& content_size) override;
virtual void notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id) override;
virtual void notify_server_did_invalidate_content_rect(Badge<WebContentClient>, Gfx::IntRect const&) override;
virtual void notify_server_did_change_selection(Badge<WebContentClient>) override;
virtual void notify_server_did_request_cursor_change(Badge<WebContentClient>, Gfx::StandardCursor cursor) override;
virtual void notify_server_did_change_title(Badge<WebContentClient>, String const&) override;
virtual void notify_server_did_request_scroll(Badge<WebContentClient>, i32, i32) override;
virtual void notify_server_did_request_scroll_to(Badge<WebContentClient>, Gfx::IntPoint const&) override;
virtual void notify_server_did_request_scroll_into_view(Badge<WebContentClient>, Gfx::IntRect const&) override;
virtual void notify_server_did_enter_tooltip_area(Badge<WebContentClient>, Gfx::IntPoint const&, String const&) override;
virtual void notify_server_did_leave_tooltip_area(Badge<WebContentClient>) override;
virtual void notify_server_did_hover_link(Badge<WebContentClient>, const AK::URL&) override;
virtual void notify_server_did_unhover_link(Badge<WebContentClient>) override;
virtual void notify_server_did_click_link(Badge<WebContentClient>, const AK::URL&, String const& target, unsigned modifiers) override;
virtual void notify_server_did_middle_click_link(Badge<WebContentClient>, const AK::URL&, String const& target, unsigned modifiers) override;
virtual void notify_server_did_start_loading(Badge<WebContentClient>, const AK::URL&) override;
virtual void notify_server_did_finish_loading(Badge<WebContentClient>, const AK::URL&) override;
virtual void notify_server_did_request_context_menu(Badge<WebContentClient>, Gfx::IntPoint const&) override;
virtual void notify_server_did_request_link_context_menu(Badge<WebContentClient>, Gfx::IntPoint const&, const AK::URL&, String const& target, unsigned modifiers) override;
virtual void notify_server_did_request_image_context_menu(Badge<WebContentClient>, Gfx::IntPoint const&, const AK::URL&, String const& target, unsigned modifiers, Gfx::ShareableBitmap const&) override;
virtual void notify_server_did_request_alert(Badge<WebContentClient>, String const& message) override;
virtual bool notify_server_did_request_confirm(Badge<WebContentClient>, String const& message) override;
virtual String notify_server_did_request_prompt(Badge<WebContentClient>, String const& message, String const& default_) override;
virtual void notify_server_did_get_source(const AK::URL& url, String const& source) override;
virtual void notify_server_did_get_dom_tree(String const& dom_tree) override;
virtual void notify_server_did_get_dom_node_properties(i32 node_id, String const& specified_style, String const& computed_style, String const& custom_properties, String const& node_box_sizing) override;
virtual void notify_server_did_output_js_console_message(i32 message_index) override;
virtual void notify_server_did_get_js_console_messages(i32 start_index, Vector<String> const& message_types, Vector<String> const& messages) override;
virtual void notify_server_did_change_favicon(Gfx::Bitmap const& favicon) override;
virtual String notify_server_did_request_cookie(Badge<WebContentClient>, const AK::URL& url, Web::Cookie::Source source) override;
virtual void notify_server_did_set_cookie(Badge<WebContentClient>, const AK::URL& url, Web::Cookie::ParsedCookie const& cookie, Web::Cookie::Source source) override;
virtual void notify_server_did_update_resource_count(i32 count_waiting) override;
virtual void notify_server_did_request_file(Badge<WebContentClient>, String const& path, i32) override;
signals:
void link_hovered(QString, int timeout = 0);
void link_unhovered();
void load_started(const URL&);
void title_changed(QString);
void favicon_changed(QIcon);
void got_source(URL, QString);
private:
void request_repaint();
void update_viewport_rect();
void handle_resize();
void ensure_js_console_widget();
void ensure_inspector_widget();
qreal m_inverse_pixel_scaling_ratio { 1.0 };
bool m_should_show_line_box_borders { false };
QPointer<QWidget> m_js_console_widget;
QPointer<QWidget> m_inspector_widget;
QTextEdit* m_js_console_output_edit { nullptr };
QLineEdit* m_js_console_input_edit { nullptr };
Gfx::IntRect m_viewport_rect;
void create_client();
WebContentClient& client();
void handle_web_content_process_crash();
AK::URL m_url;
struct SharedBitmap {
i32 id { -1 };
i32 pending_paints { 0 };
RefPtr<Gfx::Bitmap> bitmap;
};
struct ClientState {
RefPtr<WebContentClient> client;
SharedBitmap front_bitmap;
SharedBitmap back_bitmap;
i32 next_bitmap_id { 0 };
bool has_usable_bitmap { false };
bool got_repaint_requests_while_painting { false };
} m_client_state;
RefPtr<Gfx::Bitmap> m_backup_bitmap;
};
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