mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-10 01:51:03 +09:00
981ede900a
This is the simplest fix I could find that resolves a buggy interaction between this and the CSS fetch algorithms, which also doesn't regress anything. (As far as I can tell.)
105 lines
4.5 KiB
C++
105 lines
4.5 KiB
C++
/*
|
|
* Copyright (c) 2023, Preston Taylor <PrestonLeeTaylor@proton.me>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibWeb/CSS/Parser/Parser.h>
|
|
#include <LibWeb/CSS/StyleComputer.h>
|
|
#include <LibWeb/DOM/Document.h>
|
|
#include <LibWeb/DOM/ShadowRoot.h>
|
|
#include <LibWeb/DOM/StyleElementUtils.h>
|
|
#include <LibWeb/Infra/Strings.h>
|
|
|
|
namespace Web::DOM {
|
|
|
|
// The user agent must run the "update a style block" algorithm whenever one of the following conditions occur:
|
|
// FIXME: The element is popped off the stack of open elements of an HTML parser or XML parser.
|
|
//
|
|
// NOTE: This is basically done by children_changed() today:
|
|
// The element's children changed steps run.
|
|
//
|
|
// NOTE: This is basically done by inserted() and removed_from() today:
|
|
// The element is not on the stack of open elements of an HTML parser or XML parser, and it becomes connected or disconnected.
|
|
//
|
|
// https://html.spec.whatwg.org/multipage/semantics.html#update-a-style-block
|
|
void StyleElementUtils::update_a_style_block(DOM::Element& style_element)
|
|
{
|
|
// OPTIMIZATION: Skip parsing CSS if we're in the middle of parsing a HTML fragment.
|
|
// The style block will be parsed upon insertion into a proper document.
|
|
if (style_element.document().is_temporary_document_for_fragment_parsing())
|
|
return;
|
|
|
|
// 1. Let element be the style element.
|
|
// 2. If element has an associated CSS style sheet, remove the CSS style sheet in question.
|
|
|
|
if (m_associated_css_style_sheet) {
|
|
m_style_sheet_list->remove_a_css_style_sheet(*m_associated_css_style_sheet);
|
|
m_style_sheet_list = nullptr;
|
|
|
|
// FIXME: This should probably be handled by StyleSheet::set_owner_node().
|
|
m_associated_css_style_sheet = nullptr;
|
|
}
|
|
|
|
// 3. If element is not connected, then return.
|
|
if (!style_element.is_connected())
|
|
return;
|
|
|
|
// 4. If element's type attribute is present and its value is neither the empty string nor an ASCII case-insensitive match for "text/css", then return.
|
|
auto type_attribute = style_element.attribute(HTML::AttributeNames::type);
|
|
if (type_attribute.has_value() && !type_attribute->is_empty() && !Infra::is_ascii_case_insensitive_match(type_attribute->bytes_as_string_view(), "text/css"sv))
|
|
return;
|
|
|
|
// FIXME: 5. If the Should element's inline behavior be blocked by Content Security Policy? algorithm returns "Blocked" when executed upon the style element, "style", and the style element's child text content, then return. [CSP]
|
|
|
|
// 6. Create a CSS style sheet with the following properties:
|
|
// type
|
|
// text/css
|
|
// owner node
|
|
// element
|
|
// media
|
|
// The media attribute of element.
|
|
// title
|
|
// The title attribute of element, if element is in a document tree, or the empty string otherwise.
|
|
// alternate flag
|
|
// Unset.
|
|
// origin-clean flag
|
|
// Set.
|
|
// location
|
|
// parent CSS style sheet
|
|
// owner CSS rule
|
|
// null
|
|
// disabled flag
|
|
// Left at its default value.
|
|
// CSS rules
|
|
// Left uninitialized.
|
|
m_style_sheet_list = style_element.document_or_shadow_root_style_sheets();
|
|
m_associated_css_style_sheet = m_style_sheet_list->create_a_css_style_sheet(
|
|
style_element.text_content().value_or(String {}),
|
|
"text/css"_string,
|
|
&style_element,
|
|
style_element.attribute(HTML::AttributeNames::media).value_or({}),
|
|
style_element.in_a_document_tree()
|
|
? style_element.attribute(HTML::AttributeNames::title).value_or({})
|
|
: String {},
|
|
CSS::StyleSheetList::Alternate::No,
|
|
CSS::StyleSheetList::OriginClean::Yes,
|
|
// AD-HOC: Use the document's base URL as the location instead. Spec issue: https://github.com/whatwg/html/issues/11281
|
|
style_element.document().base_url(),
|
|
nullptr,
|
|
nullptr);
|
|
|
|
// 7. If element contributes a script-blocking style sheet, append element to its node document's script-blocking style sheet set.
|
|
if (style_element.contributes_a_script_blocking_style_sheet())
|
|
style_element.document().script_blocking_style_sheet_set().set(style_element);
|
|
|
|
// FIXME: 8. If element's media attribute's value matches the environment and element is potentially render-blocking, then block rendering on element.
|
|
}
|
|
|
|
void StyleElementUtils::visit_edges(JS::Cell::Visitor& visitor)
|
|
{
|
|
visitor.visit(m_associated_css_style_sheet);
|
|
visitor.visit(m_style_sheet_list);
|
|
}
|
|
|
|
}
|