mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2026-04-19 02:10:26 +00:00
a146225331
Add unsafe_layout_node(), unsafe_paintable(), and unsafe_paintable_box() accessors that skip layout-staleness verification. These are for use in contexts where accessing layout/paintable data is legitimate despite layout not being up to date: tree construction, style recalculation, painting, animation interpolation, DOM mutation, and invalidation propagation. Also add wrapper APIs on Node to centralize common patterns: - set_needs_display() wraps if (unsafe_paintable()) ...set_needs_display - set_needs_paint_only_properties_update() wraps similar - set_needs_layout_update() wraps if (unsafe_layout_node()) ... And add Document::layout_is_up_to_date() which checks whether layout tree update flags are all clear.
52 lines
1.8 KiB
C++
52 lines
1.8 KiB
C++
/*
|
||
* 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;
|
||
|
||
// NB: Called during rendering, reading background properties.
|
||
auto background_color = unsafe_layout_node()->computed_values().background_color();
|
||
auto const& background_layers = unsafe_layout_node()->background_layers();
|
||
|
||
return background_layers.is_empty() && background_color == Color::Transparent;
|
||
}
|
||
|
||
}
|