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9f02afd8fe
If we try to @import a stylesheet that was already cached, we'll get a synchronous resource_did_load() callback. Because of this, it's necessary to set up the document load event delayer *before* calling set_resource(), as otherwise we'd be stuck without a load event forever.
89 lines
2.7 KiB
C++
89 lines
2.7 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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*
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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 <AK/URL.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/DOM/Document.h>
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#include <LibWeb/Loader/ResourceLoader.h>
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namespace Web::CSS {
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CSSImportRule::CSSImportRule(AK::URL url, DOM::Document& document)
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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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CSSImportRule::~CSSImportRule()
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{
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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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// FIXME: Look into the correctness of this serialization
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builder.append("url("sv);
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builder.append(m_url.to_string());
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builder.append(')');
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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 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(CSS::ParsingContext(*m_document), resource()->encoded_data());
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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 = move(sheet);
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}
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}
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