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LibWeb: Handle disabling of StyleSheet HTMLLinkElements

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We now can handle dynamic updating of the disabled attribute of a <link>
of the stylesheet type.

We do this by hooking the adding and removing attribute's handlers and
dynamically loading/removing the stylesheet if it has been
enabled/disabled.
This commit is contained in:
Baitinq 2022-11-20 01:46:25 +01:00 • committed by Andreas Kling
parent c884aa3f25
commit d6bb110d89
2 changed files with 36 additions and 3 deletions
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34
Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp
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@ -29,6 +29,9 @@ HTMLLinkElement::~HTMLLinkElement() = default;
void HTMLLinkElement::inserted()
{
if (has_attribute(AttributeNames::disabled) && (m_relationship & Relationship::Stylesheet))
return;
HTMLElement::inserted();
if (m_relationship & Relationship::Stylesheet && !(m_relationship & Relationship::Alternate)) {
@ -92,6 +95,9 @@ void HTMLLinkElement::parse_attribute(FlyString const& name, String const& value
m_relationship |= Relationship::Icon;
}
}
if (name == HTML::AttributeNames::disabled && (m_relationship & Relationship::Stylesheet) && m_loaded_style_sheet)
document().style_sheets().remove_sheet(*m_loaded_style_sheet);
}
void HTMLLinkElement::resource_did_fail()
@ -112,6 +118,16 @@ void HTMLLinkElement::resource_did_load()
resource_did_load_favicon();
}
void HTMLLinkElement::did_remove_attribute(FlyString const& attr)
{
if (attr == HTML::AttributeNames::disabled && (m_relationship & Relationship::Stylesheet)) {
if (!resource())
inserted();
else
resource_did_load_stylesheet();
}
}
void HTMLLinkElement::resource_did_load_stylesheet()
{
VERIFY(m_relationship & Relationship::Stylesheet);
@ -128,10 +144,16 @@ void HTMLLinkElement::resource_did_load_stylesheet()
}
}
auto* sheet = parse_css_stylesheet(CSS::Parser::ParsingContext(document(), resource()->url()), resource()->encoded_data());
CSS::CSSStyleSheet* sheet = m_loaded_style_sheet;
if (!sheet) {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Failed to parse stylesheet: {}", resource()->url());
return;
sheet = parse_css_stylesheet(CSS::Parser::ParsingContext(document(), resource()->url()), resource()->encoded_data());
if (!sheet) {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Failed to parse stylesheet: {}", resource()->url());
return;
}
m_loaded_style_sheet = sheet;
}
sheet->set_owner_node(this);
@ -179,4 +201,10 @@ bool HTMLLinkElement::load_favicon_and_use_if_window_is_active()
return false;
}
void HTMLLinkElement::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_loaded_style_sheet);
}
}