Services: Move to Userland/Services/

10 files changed, 676 insertions, 0 deletions

diff --git a/Userland/Services/WebContent/CMakeLists.txt b/Userland/Services/WebContent/CMakeLists.txt
new file mode 100644
index 0000000000..a7e367ff94
--- /dev/null
+++ b/Userland/Services/WebContent/CMakeLists.txt
@@ -0,0 +1,13 @@
+compile_ipc(WebContentServer.ipc WebContentServerEndpoint.h)
+compile_ipc(WebContentClient.ipc WebContentClientEndpoint.h)
+
+set(SOURCES
+    ClientConnection.cpp
+    main.cpp
+    PageHost.cpp
+    WebContentServerEndpoint.h
+    WebContentClientEndpoint.h
+)
+
+serenity_bin(WebContent)
+target_link_libraries(WebContent LibCore LibIPC LibGfx LibWeb)
diff --git a/Userland/Services/WebContent/ClientConnection.cpp b/Userland/Services/WebContent/ClientConnection.cpp
new file mode 100644
index 0000000000..46b38f440b
--- /dev/null
+++ b/Userland/Services/WebContent/ClientConnection.cpp
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/Badge.h>
+#include <AK/SharedBuffer.h>
+#include <LibGfx/Bitmap.h>
+#include <LibGfx/SystemTheme.h>
+#include <WebContent/ClientConnection.h>
+#include <WebContent/PageHost.h>
+#include <WebContent/WebContentClientEndpoint.h>
+
+namespace WebContent {
+
+static HashMap<int, RefPtr<ClientConnection>> s_connections;
+
+ClientConnection::ClientConnection(NonnullRefPtr<Core::LocalSocket> socket, int client_id)
+    : IPC::ClientConnection<WebContentClientEndpoint, WebContentServerEndpoint>(*this, move(socket), client_id)
+    , m_page_host(PageHost::create(*this))
+{
+    s_connections.set(client_id, *this);
+    m_paint_flush_timer = Core::Timer::create_single_shot(0, [this] { flush_pending_paint_requests(); });
+}
+
+ClientConnection::~ClientConnection()
+{
+}
+
+void ClientConnection::die()
+{
+    s_connections.remove(client_id());
+    if (s_connections.is_empty())
+        Core::EventLoop::current().quit(0);
+}
+
+Web::Page& ClientConnection::page()
+{
+    return m_page_host->page();
+}
+
+const Web::Page& ClientConnection::page() const
+{
+    return m_page_host->page();
+}
+
+OwnPtr<Messages::WebContentServer::GreetResponse> ClientConnection::handle(const Messages::WebContentServer::Greet& message)
+{
+    set_client_pid(message.client_pid());
+    return make<Messages::WebContentServer::GreetResponse>(client_id(), getpid());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::UpdateSystemTheme& message)
+{
+    auto shared_buffer = SharedBuffer::create_from_shbuf_id(message.shbuf_id());
+    if (!shared_buffer) {
+        dbgln("WebContentServer::UpdateSystemTheme: SharedBuffer already gone! Ignoring :^)");
+        return;
+    }
+    Gfx::set_system_theme(*shared_buffer);
+    auto impl = Gfx::PaletteImpl::create_with_shared_buffer(*shared_buffer);
+    m_page_host->set_palette_impl(*impl);
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::LoadURL& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentServer::LoadURL: url=" << message.url();
+#endif
+    page().load(message.url());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::LoadHTML& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentServer::LoadHTML: html=" << message.html() << ", url=" << message.url();
+#endif
+    page().load_html(message.html(), message.url());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::SetViewportRect& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentServer::SetViewportRect: rect=" << message.rect();
+#endif
+    m_page_host->set_viewport_rect(message.rect());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::Paint& message)
+{
+#ifdef DEBUG_SPAM
+    dbg() << "handle: WebContentServer::Paint: content_rect=" << message.content_rect() << ", shbuf_id=" << message.shbuf_id();
+#endif
+
+    for (auto& pending_paint : m_pending_paint_requests) {
+        if (pending_paint.bitmap->shbuf_id() == message.shbuf_id()) {
+            pending_paint.content_rect = message.content_rect();
+            return;
+        }
+    }
+
+    auto shared_buffer = SharedBuffer::create_from_shbuf_id(message.shbuf_id());
+    if (!shared_buffer) {
+#ifdef DEBUG_SPAM
+        dbgln("WebContentServer::Paint: SharedBuffer already gone! Ignoring :^)");
+#endif
+        return;
+    }
+    auto shared_bitmap = Gfx::Bitmap::create_with_shared_buffer(Gfx::BitmapFormat::RGB32, shared_buffer.release_nonnull(), message.content_rect().size());
+    if (!shared_bitmap) {
+        did_misbehave("WebContentServer::Paint: Cannot create Gfx::Bitmap wrapper around SharedBuffer");
+        return;
+    }
+
+    m_pending_paint_requests.append({ message.content_rect(), shared_bitmap.release_nonnull() });
+    m_paint_flush_timer->start();
+}
+
+void ClientConnection::flush_pending_paint_requests()
+{
+    for (auto& pending_paint : m_pending_paint_requests) {
+        m_page_host->paint(pending_paint.content_rect, *pending_paint.bitmap);
+        post_message(Messages::WebContentClient::DidPaint(pending_paint.content_rect, pending_paint.bitmap->shbuf_id()));
+    }
+    m_pending_paint_requests.clear();
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::MouseDown& message)
+{
+    page().handle_mousedown(message.position(), message.button(), message.modifiers());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::MouseMove& message)
+{
+    page().handle_mousemove(message.position(), message.buttons(), message.modifiers());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::MouseUp& message)
+{
+    page().handle_mouseup(message.position(), message.button(), message.modifiers());
+}
+
+void ClientConnection::handle(const Messages::WebContentServer::KeyDown& message)
+{
+    page().handle_keydown((KeyCode)message.key(), message.modifiers(), message.code_point());
+}
+
+}
diff --git a/Userland/Services/WebContent/ClientConnection.h b/Userland/Services/WebContent/ClientConnection.h
new file mode 100644
index 0000000000..42e2ab8313
--- /dev/null
+++ b/Userland/Services/WebContent/ClientConnection.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/HashMap.h>
+#include <LibIPC/ClientConnection.h>
+#include <LibWeb/Forward.h>
+#include <WebContent/Forward.h>
+#include <WebContent/WebContentClientEndpoint.h>
+#include <WebContent/WebContentServerEndpoint.h>
+
+namespace WebContent {
+
+class ClientConnection final
+    : public IPC::ClientConnection<WebContentClientEndpoint, WebContentServerEndpoint>
+    , public WebContentServerEndpoint {
+    C_OBJECT(ClientConnection);
+
+public:
+    explicit ClientConnection(NonnullRefPtr<Core::LocalSocket>, int client_id);
+    ~ClientConnection() override;
+
+    virtual void die() override;
+
+private:
+    Web::Page& page();
+    const Web::Page& page() const;
+
+    virtual OwnPtr<Messages::WebContentServer::GreetResponse> handle(const Messages::WebContentServer::Greet&) override;
+    virtual void handle(const Messages::WebContentServer::UpdateSystemTheme&) override;
+    virtual void handle(const Messages::WebContentServer::LoadURL&) override;
+    virtual void handle(const Messages::WebContentServer::LoadHTML&) override;
+    virtual void handle(const Messages::WebContentServer::Paint&) override;
+    virtual void handle(const Messages::WebContentServer::SetViewportRect&) override;
+    virtual void handle(const Messages::WebContentServer::MouseDown&) override;
+    virtual void handle(const Messages::WebContentServer::MouseMove&) override;
+    virtual void handle(const Messages::WebContentServer::MouseUp&) override;
+    virtual void handle(const Messages::WebContentServer::KeyDown&) override;
+
+    void flush_pending_paint_requests();
+
+    NonnullOwnPtr<PageHost> m_page_host;
+
+    struct PaintRequest {
+        Gfx::IntRect content_rect;
+        NonnullRefPtr<Gfx::Bitmap> bitmap;
+    };
+    Vector<PaintRequest> m_pending_paint_requests;
+    RefPtr<Core::Timer> m_paint_flush_timer;
+};
+
+}
diff --git a/Userland/Services/WebContent/Documentation.txt b/Userland/Services/WebContent/Documentation.txt
new file mode 100644
index 0000000000..e82190106a
--- /dev/null
+++ b/Userland/Services/WebContent/Documentation.txt
@@ -0,0 +1,27 @@
+=====================
+Multi-process model:
+=====================
+
+Server                                                 Client
+
+WebContent                                             GUI process (OutOfProcessWebView embedder) 
+
+                                                       OutOfProcessWebView (this is a GUI::Widget)
+WebContent::ClientConnection               <--->         WebContentClient
+  WebContent::PageHost (Web::PageClient)
+    Web::Page
+      Web::Frame
+        Web::Document
+          ..
+
+
+=====================
+Single process model:
+=====================
+
+Web::InProcessWebView (this is a GUI::Widget, and also a Web::PageClient)
+  Web::Page
+    Web::Frame
+      Web::Document
+        ..
+
diff --git a/Userland/Services/WebContent/Forward.h b/Userland/Services/WebContent/Forward.h
new file mode 100644
index 0000000000..e43ca83960
--- /dev/null
+++ b/Userland/Services/WebContent/Forward.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+namespace WebContent {
+
+class ClientConnection;
+class PageHost;
+
+}
diff --git a/Userland/Services/WebContent/PageHost.cpp b/Userland/Services/WebContent/PageHost.cpp
new file mode 100644
index 0000000000..11641235eb
--- /dev/null
+++ b/Userland/Services/WebContent/PageHost.cpp
@@ -0,0 +1,182 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "PageHost.h"
+#include "ClientConnection.h"
+#include <AK/SharedBuffer.h>
+#include <LibGfx/Painter.h>
+#include <LibGfx/SystemTheme.h>
+#include <LibWeb/Layout/InitialContainingBlockBox.h>
+#include <LibWeb/Page/Frame.h>
+#include <WebContent/WebContentClientEndpoint.h>
+
+namespace WebContent {
+
+PageHost::PageHost(ClientConnection& client)
+    : m_client(client)
+    , m_page(make<Web::Page>(*this))
+{
+    setup_palette();
+}
+
+PageHost::~PageHost()
+{
+}
+
+void PageHost::setup_palette()
+{
+    // FIXME: Get the proper palette from our peer somehow
+    auto buffer = SharedBuffer::create_with_size(sizeof(Gfx::SystemTheme));
+    auto* theme = buffer->data<Gfx::SystemTheme>();
+    theme->color[(int)Gfx::ColorRole::Window] = Color::Magenta;
+    theme->color[(int)Gfx::ColorRole::WindowText] = Color::Cyan;
+    m_palette_impl = Gfx::PaletteImpl::create_with_shared_buffer(*buffer);
+}
+
+Gfx::Palette PageHost::palette() const
+{
+    return Gfx::Palette(*m_palette_impl);
+}
+
+void PageHost::set_palette_impl(const Gfx::PaletteImpl& impl)
+{
+    m_palette_impl = impl;
+}
+
+Web::Layout::InitialContainingBlockBox* PageHost::layout_root()
+{
+    auto* document = page().main_frame().document();
+    if (!document)
+        return nullptr;
+    return document->layout_node();
+}
+
+void PageHost::paint(const Gfx::IntRect& content_rect, Gfx::Bitmap& target)
+{
+    Gfx::Painter painter(target);
+    Gfx::IntRect bitmap_rect { {}, content_rect.size() };
+
+    auto* layout_root = this->layout_root();
+    if (!layout_root) {
+        painter.fill_rect(bitmap_rect, Color::White);
+        return;
+    }
+
+    painter.fill_rect(bitmap_rect, layout_root->document().background_color(palette()));
+
+    if (auto background_bitmap = layout_root->document().background_image()) {
+        painter.draw_tiled_bitmap(bitmap_rect, *background_bitmap);
+    }
+
+    painter.translate(-content_rect.x(), -content_rect.y());
+
+    Web::PaintContext context(painter, palette(), Gfx::IntPoint());
+    context.set_viewport_rect(content_rect);
+    layout_root->paint_all_phases(context);
+}
+
+void PageHost::set_viewport_rect(const Gfx::IntRect& rect)
+{
+    page().main_frame().set_size(rect.size());
+    if (page().main_frame().document())
+        page().main_frame().document()->update_layout();
+    page().main_frame().set_viewport_scroll_offset(rect.location());
+}
+
+void PageHost::page_did_invalidate(const Gfx::IntRect& content_rect)
+{
+    m_client.post_message(Messages::WebContentClient::DidInvalidateContentRect(content_rect));
+}
+
+void PageHost::page_did_change_selection()
+{
+    m_client.post_message(Messages::WebContentClient::DidChangeSelection());
+}
+
+void PageHost::page_did_layout()
+{
+    auto* layout_root = this->layout_root();
+    ASSERT(layout_root);
+    auto content_size = enclosing_int_rect(layout_root->absolute_rect()).size();
+    m_client.post_message(Messages::WebContentClient::DidLayout(content_size));
+}
+
+void PageHost::page_did_change_title(const String& title)
+{
+    m_client.post_message(Messages::WebContentClient::DidChangeTitle(title));
+}
+
+void PageHost::page_did_request_scroll_into_view(const Gfx::IntRect& rect)
+{
+    m_client.post_message(Messages::WebContentClient::DidRequestScrollIntoView(rect));
+}
+
+void PageHost::page_did_hover_link(const URL& url)
+{
+    m_client.post_message(Messages::WebContentClient::DidHoverLink(url));
+}
+
+void PageHost::page_did_unhover_link()
+{
+    m_client.post_message(Messages::WebContentClient::DidUnhoverLink());
+}
+
+void PageHost::page_did_click_link(const URL& url, const String& target, unsigned modifiers)
+{
+    m_client.post_message(Messages::WebContentClient::DidClickLink(url, target, modifiers));
+}
+
+void PageHost::page_did_middle_click_link(const URL& url, [[maybe_unused]] const String& target, [[maybe_unused]] unsigned modifiers)
+{
+    m_client.post_message(Messages::WebContentClient::DidMiddleClickLink(url, target, modifiers));
+}
+
+void PageHost::page_did_start_loading(const URL& url)
+{
+    m_client.post_message(Messages::WebContentClient::DidStartLoading(url));
+}
+
+void PageHost::page_did_finish_loading(const URL& url)
+{
+    m_client.post_message(Messages::WebContentClient::DidFinishLoading(url));
+}
+
+void PageHost::page_did_request_context_menu(const Gfx::IntPoint& content_position)
+{
+    m_client.post_message(Messages::WebContentClient::DidRequestContextMenu(content_position));
+}
+
+void PageHost::page_did_request_link_context_menu(const Gfx::IntPoint& content_position, const URL& url, const String& target, unsigned modifiers)
+{
+    m_client.post_message(Messages::WebContentClient::DidRequestLinkContextMenu(content_position, url, target, modifiers));
+}
+
+void PageHost::page_did_request_alert(const String& message)
+{
+    m_client.send_sync<Messages::WebContentClient::DidRequestAlert>(message);
+}
+
+}
diff --git a/Userland/Services/WebContent/PageHost.h b/Userland/Services/WebContent/PageHost.h
new file mode 100644
index 0000000000..0ee9e393d9
--- /dev/null
+++ b/Userland/Services/WebContent/PageHost.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibWeb/Page/Page.h>
+
+namespace WebContent {
+
+class ClientConnection;
+
+class PageHost final : public Web::PageClient {
+    AK_MAKE_NONCOPYABLE(PageHost);
+    AK_MAKE_NONMOVABLE(PageHost);
+
+public:
+    static NonnullOwnPtr<PageHost> create(ClientConnection& client) { return adopt_own(*new PageHost(client)); }
+    virtual ~PageHost();
+
+    Web::Page& page() { return *m_page; }
+    const Web::Page& page() const { return *m_page; }
+
+    void paint(const Gfx::IntRect& content_rect, Gfx::Bitmap&);
+
+    void set_palette_impl(const Gfx::PaletteImpl&);
+    void set_viewport_rect(const Gfx::IntRect&);
+
+private:
+    // ^PageClient
+    virtual Gfx::Palette palette() const override;
+    virtual void page_did_invalidate(const Gfx::IntRect&) override;
+    virtual void page_did_change_selection() override;
+    virtual void page_did_layout() override;
+    virtual void page_did_change_title(const String&) override;
+    virtual void page_did_request_scroll_into_view(const Gfx::IntRect&) override;
+    virtual void page_did_hover_link(const URL&) override;
+    virtual void page_did_unhover_link() override;
+    virtual void page_did_click_link(const URL&, const String& target, unsigned modifiers) override;
+    virtual void page_did_middle_click_link(const URL&, const String& target, unsigned modifiers) override;
+    virtual void page_did_request_context_menu(const Gfx::IntPoint&) override;
+    virtual void page_did_request_link_context_menu(const Gfx::IntPoint&, const URL&, const String& target, unsigned modifiers) override;
+    virtual void page_did_start_loading(const URL&) override;
+    virtual void page_did_finish_loading(const URL&) override;
+    virtual void page_did_request_alert(const String&) override;
+
+    explicit PageHost(ClientConnection&);
+
+    Web::Layout::InitialContainingBlockBox* layout_root();
+    void setup_palette();
+
+    ClientConnection& m_client;
+    NonnullOwnPtr<Web::Page> m_page;
+    RefPtr<Gfx::PaletteImpl> m_palette_impl;
+};
+
+}
diff --git a/Userland/Services/WebContent/WebContentClient.ipc b/Userland/Services/WebContent/WebContentClient.ipc
new file mode 100644
index 0000000000..10008a765c
--- /dev/null
+++ b/Userland/Services/WebContent/WebContentClient.ipc
@@ -0,0 +1,18 @@
+endpoint WebContentClient = 90
+{
+    DidStartLoading(URL url) =|
+    DidFinishLoading(URL url) =|
+    DidPaint(Gfx::IntRect content_rect, i32 shbuf_id) =|
+    DidInvalidateContentRect(Gfx::IntRect content_rect) =|
+    DidChangeSelection() =|
+    DidLayout(Gfx::IntSize content_size) =|
+    DidChangeTitle(String title) =|
+    DidRequestScrollIntoView(Gfx::IntRect rect) =|
+    DidHoverLink(URL url) =|
+    DidUnhoverLink() =|
+    DidClickLink(URL url, String target, unsigned modifiers) =|
+    DidMiddleClickLink(URL url, String target, unsigned modifiers) =|
+    DidRequestContextMenu(Gfx::IntPoint content_position) =|
+    DidRequestLinkContextMenu(Gfx::IntPoint content_position, URL url, String target, unsigned modifiers) =|
+    DidRequestAlert(String message) => ()
+}
diff --git a/Userland/Services/WebContent/WebContentServer.ipc b/Userland/Services/WebContent/WebContentServer.ipc
new file mode 100644
index 0000000000..143650dab7
--- /dev/null
+++ b/Userland/Services/WebContent/WebContentServer.ipc
@@ -0,0 +1,18 @@
+endpoint WebContentServer = 89
+{
+    Greet(i32 client_pid) => (i32 client_id, i32 server_pid)
+
+    UpdateSystemTheme(i32 shbuf_id) =|
+
+    LoadURL(URL url) =|
+    LoadHTML(String html, URL url) =|
+
+    Paint(Gfx::IntRect content_rect, i32 shbuf_id) =|
+    SetViewportRect(Gfx::IntRect rect) =|
+
+    MouseDown(Gfx::IntPoint position, unsigned button, unsigned buttons, unsigned modifiers) =|
+    MouseMove(Gfx::IntPoint position, unsigned button, unsigned buttons, unsigned modifiers) =|
+    MouseUp(Gfx::IntPoint position, unsigned button, unsigned buttons, unsigned modifiers) =|
+
+    KeyDown(i32 key, unsigned modifiers, u32 code_point) =|
+}
diff --git a/Userland/Services/WebContent/main.cpp b/Userland/Services/WebContent/main.cpp
new file mode 100644
index 0000000000..5367f2cce3
--- /dev/null
+++ b/Userland/Services/WebContent/main.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibCore/EventLoop.h>
+#include <LibCore/LocalServer.h>
+#include <LibIPC/ClientConnection.h>
+#include <WebContent/ClientConnection.h>
+
+int main(int, char**)
+{
+    Core::EventLoop event_loop;
+    if (pledge("stdio shared_buffer accept unix rpath recvfd", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+    if (unveil("/res", "r") < 0) {
+        perror("unveil");
+        return 1;
+    }
+    if (unveil("/tmp/portal/protocol", "rw") < 0) {
+        perror("unveil");
+        return 1;
+    }
+    if (unveil("/tmp/portal/image", "rw") < 0) {
+        perror("unveil");
+        return 1;
+    }
+    if (unveil(nullptr, nullptr) < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    auto socket = Core::LocalSocket::take_over_accepted_socket_from_system_server();
+    ASSERT(socket);
+    IPC::new_client_connection<WebContent::ClientConnection>(socket.release_nonnull(), 1);
+    return event_loop.exec();
+}