ddbfac38b0
You can now build with STYLE_INVALIDATION_DEBUG and get a debug stream of reasons why style invalidations are happening and where. I've rewritten this code many times, so instead of throwing it away once again, I figured we should at least have it behind a flag.
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Debug.h>
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#include <LibURL/URL.h>
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#include <LibWeb/Bindings/CSSImportRulePrototype.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/CSS/CSSImportRule.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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#include <LibWeb/CSS/StyleComputer.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/Loader/ResourceLoader.h>
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namespace Web::CSS {
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JS_DEFINE_ALLOCATOR(CSSImportRule);
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JS::NonnullGCPtr<CSSImportRule> CSSImportRule::create(URL::URL url, DOM::Document& document)
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{
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auto& realm = document.realm();
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return realm.heap().allocate<CSSImportRule>(realm, move(url), document);
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}
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CSSImportRule::CSSImportRule(URL::URL url, DOM::Document& document)
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: CSSRule(document.realm())
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, m_url(move(url))
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, m_document(document)
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{
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dbgln_if(CSS_LOADER_DEBUG, "CSSImportRule: Loading import URL: {}", m_url);
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auto request = LoadRequest::create_for_url_on_page(m_url, &document.page());
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// NOTE: Mark this rule as delaying the document load event *before* calling set_resource()
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// as it may trigger a synchronous resource_did_load() callback.
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m_document_load_event_delayer.emplace(document);
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set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
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}
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void CSSImportRule::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSImportRule);
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}
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void CSSImportRule::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_document);
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visitor.visit(m_style_sheet);
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}
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// https://www.w3.org/TR/cssom/#serialize-a-css-rule
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String CSSImportRule::serialized() const
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{
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StringBuilder builder;
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// The result of concatenating the following:
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// 1. The string "@import" followed by a single SPACE (U+0020).
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builder.append("@import "sv);
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// 2. The result of performing serialize a URL on the rule’s location.
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serialize_a_url(builder, MUST(m_url.to_string()));
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// FIXME: 3. If the rule’s associated media list is not empty, a single SPACE (U+0020) followed by the result of performing serialize a media query list on the media list.
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// 4. The string ";", i.e., SEMICOLON (U+003B).
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builder.append(';');
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return MUST(builder.to_string());
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}
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void CSSImportRule::resource_did_fail()
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{
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dbgln_if(CSS_LOADER_DEBUG, "CSSImportRule: Resource did fail. URL: {}", resource()->url());
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m_document_load_event_delayer.clear();
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}
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void CSSImportRule::resource_did_load()
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{
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VERIFY(resource());
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if (!m_document)
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return;
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m_document_load_event_delayer.clear();
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if (!resource()->has_encoded_data()) {
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dbgln_if(CSS_LOADER_DEBUG, "CSSImportRule: Resource did load, no encoded data. URL: {}", resource()->url());
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} else {
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dbgln_if(CSS_LOADER_DEBUG, "CSSImportRule: Resource did load, has encoded data. URL: {}", resource()->url());
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}
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auto* sheet = parse_css_stylesheet(CSS::Parser::ParsingContext(*m_document, resource()->url()), resource()->encoded_data(), resource()->url());
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if (!sheet) {
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dbgln_if(CSS_LOADER_DEBUG, "CSSImportRule: Failed to parse stylesheet: {}", resource()->url());
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return;
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}
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m_style_sheet = sheet;
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m_style_sheet->set_owner_css_rule(this);
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m_document->style_computer().invalidate_rule_cache();
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m_document->style_computer().load_fonts_from_sheet(*m_style_sheet);
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m_document->invalidate_style(DOM::StyleInvalidationReason::CSSImportRule);
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}
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}
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