/*
* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/HTMLHtmlElementPrototype.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/CSS/ComputedProperties.h>
#include <LibWeb/HTML/HTMLBodyElement.h>
#include <LibWeb/HTML/HTMLHtmlElement.h>
#include <LibWeb/Layout/Node.h>
namespace Web::HTML {
GC_DEFINE_ALLOCATOR(HTMLHtmlElement);
HTMLHtmlElement::HTMLHtmlElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: HTMLElement(document, move(qualified_name))
{
}
HTMLHtmlElement::~HTMLHtmlElement() = default;
void HTMLHtmlElement::initialize(JS::Realm& realm)
{
WEB_SET_PROTOTYPE_FOR_INTERFACE(HTMLHtmlElement);
Base::initialize(realm);
}
bool HTMLHtmlElement::should_use_body_background_properties() const
{
// https://drafts.csswg.org/css-contain-2/#contain-property
// Additionally, when any containments are active on either the HTML <html> or <body> elements, propagation of
// properties from the <body> element to the initial containing block, the viewport, or the canvas background, is
// disabled. Notably, this affects:
// - 'background' and its longhands (see CSS Backgrounds 3 § 2.11.2 The Canvas Background and the HTML <body> Element)
if (!computed_properties()->contain().is_empty())
return false;
auto* body_element = first_child_of_type<HTML::HTMLBodyElement>();
if (body_element && !body_element->computed_properties()->contain().is_empty())
return false;
auto background_color = layout_node()->computed_values().background_color();
auto const& background_layers = layout_node()->background_layers();
for (auto& layer : background_layers) {
if (layer.background_image)
return false;
}
return (background_color == Color::Transparent);
}
}