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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/URL.h>
#include <LibWeb/CSS/Parser/Parser.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Loader/CSSLoader.h>
#include <LibWeb/Loader/ResourceLoader.h>
namespace Web {
CSSLoader::CSSLoader(DOM::Element& owner_element)
: m_owner_element(owner_element)
{
}
void CSSLoader::load_from_text(const String& text)
{
m_style_sheet = parse_css(CSS::ParsingContext(m_owner_element.document()), text);
if (!m_style_sheet) {
m_style_sheet = CSS::CSSStyleSheet::create({});
m_style_sheet->set_owner_node(&m_owner_element);
}
load_next_import_if_needed();
}
void CSSLoader::load_from_url(const URL& url)
{
m_style_sheet = CSS::CSSStyleSheet::create({});
m_style_sheet->set_owner_node(&m_owner_element);
auto request = LoadRequest::create_for_url_on_page(url, m_owner_element.document().page());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
}
void CSSLoader::resource_did_load()
{
VERIFY(resource());
if (!resource()->has_encoded_data()) {
dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did load, no encoded data. URL: {}", resource()->url());
} else {
dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did load, has encoded data. URL: {}", resource()->url());
}
auto sheet = parse_css(CSS::ParsingContext(m_owner_element.document()), resource()->encoded_data());
if (!sheet) {
dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Failed to parse stylesheet: {}", resource()->url());
return;
}
bool was_imported = m_style_sheet->for_first_not_loaded_import_rule([&](auto& rule) {
rule.set_style_sheet(sheet);
});
// Transfer the rules from the successfully parsed sheet into the sheet we've already inserted.
if (!was_imported) {
m_style_sheet->rules() = sheet->rules();
}
if (on_load)
on_load();
load_next_import_if_needed();
}
void CSSLoader::resource_did_fail()
{
dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did fail. URL: {}", resource()->url());
load_next_import_if_needed();
}
void CSSLoader::load_next_import_if_needed()
{
// Create load request for the first import which isn't loaded.
// TODO: We need to somehow handle infinite cycles in imports.
m_style_sheet->for_first_not_loaded_import_rule([&](auto& rule) {
dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Loading @import {}", rule.url());
LoadRequest request;
request.set_url(rule.url());
set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
});
}
}
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