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LibWeb/CSS: Implement the color-scheme CSS property

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This commit is contained in:
Gingeh 2025-01-02 12:59:09 +11:00 • committed by Sam Atkins
commit ce5cd012b9
Notes: github-actions[bot] 2025-01-08 11:19:41 +00:00
36 changed files with 618 additions and 370 deletions
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45
Libraries/LibWeb/DOM/Document.cpp
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@ -1769,25 +1769,19 @@ void Document::release_events()
// Do nothing
}
Color Document::normal_link_color() const
Optional<Color> Document::normal_link_color() const
{
if (m_normal_link_color.has_value())
return m_normal_link_color.value();
return CSS::SystemColor::link_text();
return m_normal_link_color;
}
Color Document::active_link_color() const
Optional<Color> Document::active_link_color() const
{
if (m_active_link_color.has_value())
return m_active_link_color.value();
return CSS::SystemColor::active_text();
return m_active_link_color;
}
Color Document::visited_link_color() const
Optional<Color> Document::visited_link_color() const
{
if (m_visited_link_color.has_value())
return m_visited_link_color.value();
return CSS::SystemColor::visited_text();
return m_visited_link_color;
}
// https://html.spec.whatwg.org/multipage/webappapis.html#relevant-settings-object
@ -5912,13 +5906,38 @@ RefPtr<Painting::DisplayList> Document::record_display_list(PaintConfig config)
auto display_list = Painting::DisplayList::create();
Painting::DisplayListRecorder display_list_recorder(display_list);
// https://drafts.csswg.org/css-color-adjust-1/#color-scheme-effect
// On the root element, the used color scheme additionally must affect the surface color of the canvas, and the viewport’s scrollbars.
auto color_scheme = CSS::PreferredColorScheme::Light;
if (auto* html_element = this->html_element(); html_element && html_element->layout_node()) {
if (html_element->layout_node()->computed_values().color_scheme() == CSS::PreferredColorScheme::Dark)
color_scheme = CSS::PreferredColorScheme::Dark;
}
// .. in the case of embedded documents typically rendered over a transparent canvas
// (such as provided via an HTML iframe element), if the used color scheme of the element
// and the used color scheme of the embedded document’s root element do not match,
// then the UA must use an opaque canvas of the Canvas color appropriate to the
// embedded document’s used color scheme instead of a transparent canvas.
bool opaque_canvas = false;
if (auto container_element = navigable()->container(); container_element && container_element->layout_node()) {
auto container_scheme = container_element->layout_node()->computed_values().color_scheme();
if (container_scheme == CSS::PreferredColorScheme::Auto)
container_scheme = CSS::PreferredColorScheme::Light;
opaque_canvas = container_scheme != color_scheme;
}
if (config.canvas_fill_rect.has_value()) {
display_list_recorder.fill_rect(config.canvas_fill_rect.value(), CSS::SystemColor::canvas());
display_list_recorder.fill_rect(config.canvas_fill_rect.value(), CSS::SystemColor::canvas(color_scheme));
}
auto viewport_rect = page().css_to_device_rect(this->viewport_rect());
Gfx::IntRect bitmap_rect { {}, viewport_rect.size().to_type<int>() };
if (opaque_canvas)
display_list_recorder.fill_rect(bitmap_rect, CSS::SystemColor::canvas(color_scheme));
display_list_recorder.fill_rect(bitmap_rect, background_color());
if (!paintable()) {
VERIFY_NOT_REACHED();