LibWeb+WebContent: Add set_preferred_color_scheme IPC call

This allows the owner of a WebView to override whether to use a dark
theme or not, instead of just using the system theme's IsDark property.

Userland/Libraries/LibWeb/InProcessWebView.cpp

@@ -51,6 +51,13 @@ String InProcessWebView::selected_text() const
     return page().focused_context().selected_text();
 }
 
+void InProcessWebView::set_preferred_color_scheme(CSS::PreferredColorScheme color_scheme)
+{
+    m_preferred_color_scheme = color_scheme;
+    if (auto* document = page().top_level_browsing_context().active_document())
+        document->invalidate_style();
+}
+
 void InProcessWebView::page_did_layout()
 {
     VERIFY(layout_root());

Userland/Libraries/LibWeb/InProcessWebView.h

@@ -40,6 +40,7 @@ public:
 
     AK::URL url() const;
 
+    void set_preferred_color_scheme(CSS::PreferredColorScheme);
     void set_should_show_line_box_borders(bool value) { m_should_show_line_box_borders = value; }
 
     String selected_text() const;
@@ -65,6 +66,7 @@ private:
     // ^Web::PageClient
     virtual Gfx::Palette palette() const override { return GUI::AbstractScrollableWidget::palette(); }
     virtual Gfx::IntRect screen_rect() const override { return GUI::Desktop::the().rect(); }
+    virtual CSS::PreferredColorScheme preferred_color_scheme() const override { return m_preferred_color_scheme; }
     virtual void page_did_change_title(const String&) override;
     virtual void page_did_set_document_in_top_level_browsing_context(DOM::Document*) override;
     virtual void page_did_start_loading(const AK::URL&) override;
@@ -95,6 +97,7 @@ private:
     bool m_should_show_line_box_borders { false };
 
     NonnullOwnPtr<Page> m_page;
+    CSS::PreferredColorScheme m_preferred_color_scheme { CSS::PreferredColorScheme::Auto };
 };
 
 }

Userland/Libraries/LibWeb/OutOfProcessWebView.cpp

@@ -489,4 +489,9 @@ void OutOfProcessWebView::set_content_filters(Vector<String> filters)
     client().async_set_content_filters(filters);
 }
 
+void OutOfProcessWebView::set_preferred_color_scheme(Web::CSS::PreferredColorScheme color_scheme)
+{
+    client().async_set_preferred_color_scheme(color_scheme);
+}
+
 }

Userland/Libraries/LibWeb/OutOfProcessWebView.h

@@ -9,6 +9,7 @@
 #include <AK/URL.h>
 #include <LibGUI/AbstractScrollableWidget.h>
 #include <LibGUI/Widget.h>
+#include <LibWeb/Page/Page.h>
 #include <LibWeb/WebViewHooks.h>
 
 namespace Web {
@@ -52,6 +53,7 @@ public:
     String dump_layout_tree();
 
     void set_content_filters(Vector<String>);
+    void set_preferred_color_scheme(Web::CSS::PreferredColorScheme);
 
     void notify_server_did_layout(Badge<WebContentClient>, const Gfx::IntSize& content_size);
     void notify_server_did_paint(Badge<WebContentClient>, i32 bitmap_id);

Userland/Libraries/LibWeb/Page/Page.cpp

@@ -56,6 +56,11 @@ Gfx::IntRect Page::screen_rect() const
     return m_client.screen_rect();
 }
 
+CSS::PreferredColorScheme Page::preferred_color_scheme() const
+{
+    return m_client.preferred_color_scheme();
+}
+
 bool Page::handle_mousewheel(const Gfx::IntPoint& position, unsigned button, unsigned modifiers, int wheel_delta)
 {
     return top_level_browsing_context().event_handler().handle_mousewheel(position, button, modifiers, wheel_delta);

Userland/Libraries/LibWeb/Page/Page.h

@@ -16,6 +16,7 @@
 #include <LibGfx/Forward.h>
 #include <LibGfx/Palette.h>
 #include <LibGfx/StandardCursor.h>
+#include <LibWeb/CSS/PreferredColorScheme.h>
 #include <LibWeb/Forward.h>
 
 namespace Web {
@@ -56,6 +57,7 @@ public:
 
     Gfx::Palette palette() const;
     Gfx::IntRect screen_rect() const;
+    CSS::PreferredColorScheme preferred_color_scheme() const;
 
     bool is_same_origin_policy_enabled() const { return m_same_origin_policy_enabled; }
     void set_same_origin_policy_enabled(bool b) { m_same_origin_policy_enabled = b; }
@@ -74,6 +76,7 @@ class PageClient {
 public:
     virtual Gfx::Palette palette() const = 0;
     virtual Gfx::IntRect screen_rect() const = 0;
+    virtual CSS::PreferredColorScheme preferred_color_scheme() const = 0;
     virtual void page_did_set_document_in_top_level_browsing_context(DOM::Document*) { }
     virtual void page_did_change_title(const String&) { }
     virtual void page_did_start_loading(const AK::URL&) { }

Userland/Services/WebContent/ClientConnection.cpp

@@ -351,4 +351,9 @@ void ClientConnection::set_content_filters(Vector<String> const& filters)
         Web::ContentFilter::the().add_pattern(filter);
 }
 
+void ClientConnection::set_preferred_color_scheme(Web::CSS::PreferredColorScheme const& color_scheme)
+{
+    m_page_host->set_preferred_color_scheme(color_scheme);
+}
+
 }

Userland/Services/WebContent/ClientConnection.h

@@ -10,6 +10,7 @@
 #include <LibIPC/ClientConnection.h>
 #include <LibJS/Forward.h>
 #include <LibJS/Heap/Handle.h>
+#include <LibWeb/CSS/PreferredColorScheme.h>
 #include <LibWeb/Cookie/ParsedCookie.h>
 #include <LibWeb/Forward.h>
 #include <WebContent/Forward.h>
@@ -57,6 +58,7 @@ private:
     virtual Messages::WebContentServer::GetHoveredNodeIdResponse get_hovered_node_id() override;
     virtual Messages::WebContentServer::DumpLayoutTreeResponse dump_layout_tree() override;
     virtual void set_content_filters(Vector<String> const&) override;
+    virtual void set_preferred_color_scheme(Web::CSS::PreferredColorScheme const&) override;
 
     virtual void js_console_input(String const&) override;
     virtual void run_javascript(String const&) override;

Userland/Services/WebContent/PageHost.cpp

@@ -51,6 +51,13 @@ void PageHost::set_palette_impl(const Gfx::PaletteImpl& impl)
     m_palette_impl = impl;
 }
 
+void PageHost::set_preferred_color_scheme(Web::CSS::PreferredColorScheme color_scheme)
+{
+    m_preferred_color_scheme = color_scheme;
+    if (auto* document = page().top_level_browsing_context().active_document())
+        document->invalidate_style();
+}
+
 Web::Layout::InitialContainingBlock* PageHost::layout_root()
 {
     auto* document = page().top_level_browsing_context().active_document();

Userland/Services/WebContent/PageHost.h

@@ -29,6 +29,7 @@ public:
     void set_palette_impl(const Gfx::PaletteImpl&);
     void set_viewport_rect(const Gfx::IntRect&);
     void set_screen_rects(const Vector<Gfx::IntRect, 4>& rects, size_t main_screen_index) { m_screen_rect = rects[main_screen_index]; };
+    void set_preferred_color_scheme(Web::CSS::PreferredColorScheme);
 
     void set_should_show_line_box_borders(bool b) { m_should_show_line_box_borders = b; }
 
@@ -36,6 +37,7 @@ private:
     // ^PageClient
     virtual Gfx::Palette palette() const override;
     virtual Gfx::IntRect screen_rect() const override { return m_screen_rect; }
+    virtual Web::CSS::PreferredColorScheme preferred_color_scheme() const override { return m_preferred_color_scheme; }
     virtual void page_did_invalidate(const Gfx::IntRect&) override;
     virtual void page_did_change_selection() override;
     virtual void page_did_request_cursor_change(Gfx::StandardCursor) override;
@@ -75,6 +77,7 @@ private:
 
     RefPtr<Core::Timer> m_invalidation_coalescing_timer;
     Gfx::IntRect m_invalidation_rect;
+    Web::CSS::PreferredColorScheme m_preferred_color_scheme { Web::CSS::PreferredColorScheme::Auto };
 };
 
 }

Userland/Services/WebContent/WebContentServer.ipc

@@ -1,6 +1,7 @@
 #include <AK/URL.h>
 #include <LibCore/AnonymousBuffer.h>
 #include <LibGfx/ShareableBitmap.h>
+#include <LibWeb/CSS/PreferredColorScheme.h>
 
 endpoint WebContentServer
 {
@@ -41,5 +42,6 @@ endpoint WebContentServer
     select_all() =|
 
     set_content_filters(Vector<String> filters) =|
+    set_preferred_color_scheme(Web::CSS::PreferredColorScheme color_scheme) =|
 
 }