mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 03:22:43 +00:00
115 lines
4 KiB
C++
115 lines
4 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/DeprecatedCSSParser.h>
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#include <LibWeb/CSS/StyleSheet.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/Loader/CSSLoader.h>
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#include <LibWeb/Loader/ResourceLoader.h>
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namespace Web {
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CSSLoader::CSSLoader(DOM::Element& owner_element)
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: m_owner_element(owner_element)
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{
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}
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void CSSLoader::load_from_text(const String& text)
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{
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m_style_sheet = parse_css(CSS::ParsingContext(m_owner_element.document()), text);
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if (!m_style_sheet) {
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m_style_sheet = CSS::CSSStyleSheet::create({});
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m_style_sheet->set_owner_node(&m_owner_element);
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}
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load_next_import_if_needed();
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}
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void CSSLoader::load_from_url(const URL& url)
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{
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m_style_sheet = CSS::CSSStyleSheet::create({});
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m_style_sheet->set_owner_node(&m_owner_element);
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LoadRequest request;
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request.set_url(url);
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set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
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}
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void CSSLoader::resource_did_load()
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{
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VERIFY(resource());
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if (!resource()->has_encoded_data()) {
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dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did load, no encoded data. URL: {}", resource()->url());
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} else {
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dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did load, has encoded data. URL: {}", resource()->url());
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}
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auto sheet = parse_css(CSS::ParsingContext(m_owner_element.document()), resource()->encoded_data());
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if (!sheet) {
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dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Failed to parse stylesheet: {}", resource()->url());
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return;
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}
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bool was_imported = m_style_sheet->for_first_not_loaded_import_rule([&](auto& rule) {
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rule.set_style_sheet(sheet);
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});
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// Transfer the rules from the successfully parsed sheet into the sheet we've already inserted.
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if (!was_imported) {
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m_style_sheet->rules() = sheet->rules();
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}
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if (on_load)
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on_load();
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load_next_import_if_needed();
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}
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void CSSLoader::resource_did_fail()
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{
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dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Resource did fail. URL: {}", resource()->url());
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load_next_import_if_needed();
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}
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void CSSLoader::load_next_import_if_needed()
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{
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// Create load request for the first import which isn't loaded.
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// TODO: We need to somehow handle infinite cycles in imports.
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m_style_sheet->for_first_not_loaded_import_rule([&](auto& rule) {
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dbgln_if(CSS_LOADER_DEBUG, "CSSLoader: Loading @import {}", rule.url());
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LoadRequest request;
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request.set_url(rule.url());
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set_resource(ResourceLoader::the().load_resource(Resource::Type::Generic, request));
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});
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}
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}
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