/* * Copyright (c) 2018-2020, Andreas Kling * * SPDX-License-Identifier: BSD-2-Clause */ #include #include #include #include #include #include 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) { Base::initialize(realm); WEB_SET_PROTOTYPE_FOR_INTERFACE(HTMLHtmlElement); } 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 or elements, propagation of // properties from the 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 Element) if (!computed_properties()->contain().is_empty()) return false; auto* body_element = first_child_of_type(); 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); } }