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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, the SerenityOS developers.
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <AK/Debug.h>
#include <AK/URL.h>
#include <LibWeb/CSS/Parser/Parser.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/HTMLLinkElement.h>
#include <LibWeb/Loader/ResourceLoader.h>
namespace Web::HTML {
HTMLLinkElement::HTMLLinkElement(DOM::Document& document, DOM::QualifiedName qualified_name)
: HTMLElement(document, move(qualified_name))
{
}
HTMLLinkElement::~HTMLLinkElement() = default;
void HTMLLinkElement::inserted()
{
HTMLElement::inserted();
if (m_relationship & Relationship::Stylesheet && !(m_relationship & Relationship::Alternate)) {
auto url = document().parse_url(href());
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Loading import URL: {}", url);
auto request = LoadRequest::create_for_url_on_page(url, document().page());
// NOTE: Mark this element as delaying the document load event *before* calling set_resource()
// as it may trigger a synchronous resource_did_load() callback.
m_document_load_event_delayer.emplace(document());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
// NOTE: If we ended up not loading a resource for whatever reason, don't delay the load event.
if (!resource())
m_document_load_event_delayer.clear();
}
if (m_relationship & Relationship::Preload) {
// FIXME: Respect the "as" attribute.
LoadRequest request;
request.set_url(document().parse_url(attribute(HTML::AttributeNames::href)));
m_preload_resource = ResourceLoader::the().load_resource(Resource::Type::Generic, request);
} else if (m_relationship & Relationship::DNSPrefetch) {
ResourceLoader::the().prefetch_dns(document().parse_url(attribute(HTML::AttributeNames::href)));
} else if (m_relationship & Relationship::Preconnect) {
ResourceLoader::the().preconnect(document().parse_url(attribute(HTML::AttributeNames::href)));
}
}
void HTMLLinkElement::parse_attribute(FlyString const& name, String const& value)
{
if (name == HTML::AttributeNames::rel) {
m_relationship = 0;
auto parts = value.split_view(' ');
for (auto& part : parts) {
if (part == "stylesheet"sv)
m_relationship |= Relationship::Stylesheet;
else if (part == "alternate"sv)
m_relationship |= Relationship::Alternate;
else if (part == "preload"sv)
m_relationship |= Relationship::Preload;
else if (part == "dns-prefetch"sv)
m_relationship |= Relationship::DNSPrefetch;
else if (part == "preconnect"sv)
m_relationship |= Relationship::Preconnect;
}
}
}
void HTMLLinkElement::resource_did_fail()
{
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did fail. URL: {}", resource()->url());
m_document_load_event_delayer.clear();
}
void HTMLLinkElement::resource_did_load()
{
VERIFY(resource());
m_document_load_event_delayer.clear();
if (!resource()->has_encoded_data()) {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, no encoded data. URL: {}", resource()->url());
} else {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, has encoded data. URL: {}", resource()->url());
if (resource()->mime_type() != "text/css"sv) {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Resource did load, but MIME type was {} instead of text/css. URL: {}", resource()->mime_type(), resource()->url());
return;
}
}
auto sheet = parse_css_stylesheet(CSS::ParsingContext(document(), resource()->url()), resource()->encoded_data());
if (!sheet) {
dbgln_if(CSS_LOADER_DEBUG, "HTMLLinkElement: Failed to parse stylesheet: {}", resource()->url());
return;
}
sheet->set_owner_node(this);
document().style_sheets().add_sheet(sheet.release_nonnull());
}
}
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