f7ff1fd985
This relied on pulling the current realm from the main thread VM, which requires an execution context to be on the VM's stack. This heavily relied on the dummy execution context that is always on the stack, for example, when parsing the UA style sheets where no JavaScript is running.
133 lines
4.6 KiB
C++
133 lines
4.6 KiB
C++
/*
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* Copyright (c) 2019-2022, 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 <LibWeb/Bindings/CSSStyleSheetPrototype.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/CSS/CSSStyleSheet.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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#include <LibWeb/CSS/StyleSheetList.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::CSS {
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WebIDL::ExceptionOr<JS::NonnullGCPtr<CSSStyleSheet>> CSSStyleSheet::create(JS::Realm& realm, CSSRuleList& rules, MediaList& media, Optional<AK::URL> location)
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{
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return MUST_OR_THROW_OOM(realm.heap().allocate<CSSStyleSheet>(realm, realm, rules, media, move(location)));
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}
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CSSStyleSheet::CSSStyleSheet(JS::Realm& realm, CSSRuleList& rules, MediaList& media, Optional<AK::URL> location)
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: StyleSheet(realm, media)
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, m_rules(&rules)
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{
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if (location.has_value())
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set_location(location->to_deprecated_string());
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for (auto& rule : *m_rules)
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rule.set_parent_style_sheet(this);
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}
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JS::ThrowCompletionOr<void> CSSStyleSheet::initialize(JS::Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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set_prototype(&Bindings::ensure_web_prototype<Bindings::CSSStyleSheetPrototype>(realm, "CSSStyleSheet"));
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return {};
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}
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void CSSStyleSheet::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_style_sheet_list.ptr());
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visitor.visit(m_rules);
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visitor.visit(m_owner_css_rule);
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}
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// https://www.w3.org/TR/cssom/#dom-cssstylesheet-insertrule
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WebIDL::ExceptionOr<unsigned> CSSStyleSheet::insert_rule(StringView rule, unsigned index)
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{
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// FIXME: 1. If the origin-clean flag is unset, throw a SecurityError exception.
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// FIXME: 2. If the disallow modification flag is set, throw a NotAllowedError DOMException.
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// 3. Let parsed rule be the return value of invoking parse a rule with rule.
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auto context = m_style_sheet_list ? CSS::Parser::ParsingContext { m_style_sheet_list->document() } : CSS::Parser::ParsingContext { realm() };
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auto parsed_rule = parse_css_rule(context, rule);
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// 4. If parsed rule is a syntax error, return parsed rule.
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if (!parsed_rule)
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return WebIDL::SyntaxError::create(realm(), "Unable to parse CSS rule.");
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// FIXME: 5. If parsed rule is an @import rule, and the constructed flag is set, throw a SyntaxError DOMException.
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// 6. Return the result of invoking insert a CSS rule rule in the CSS rules at index.
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auto result = m_rules->insert_a_css_rule(parsed_rule, index);
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if (!result.is_exception()) {
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// NOTE: The spec doesn't say where to set the parent style sheet, so we'll do it here.
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parsed_rule->set_parent_style_sheet(this);
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if (m_style_sheet_list) {
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m_style_sheet_list->document().style_computer().invalidate_rule_cache();
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m_style_sheet_list->document().invalidate_style();
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}
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}
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return result;
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}
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// https://www.w3.org/TR/cssom/#dom-cssstylesheet-deleterule
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WebIDL::ExceptionOr<void> CSSStyleSheet::delete_rule(unsigned index)
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{
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// FIXME: 1. If the origin-clean flag is unset, throw a SecurityError exception.
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// FIXME: 2. If the disallow modification flag is set, throw a NotAllowedError DOMException.
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// 3. Remove a CSS rule in the CSS rules at index.
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auto result = m_rules->remove_a_css_rule(index);
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if (!result.is_exception()) {
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if (m_style_sheet_list) {
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m_style_sheet_list->document().style_computer().invalidate_rule_cache();
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m_style_sheet_list->document().invalidate_style();
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}
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}
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return result;
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}
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// https://www.w3.org/TR/cssom/#dom-cssstylesheet-removerule
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WebIDL::ExceptionOr<void> CSSStyleSheet::remove_rule(unsigned index)
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{
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// The removeRule(index) method must run the same steps as deleteRule().
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return delete_rule(index);
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}
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void CSSStyleSheet::for_each_effective_style_rule(Function<void(CSSStyleRule const&)> const& callback) const
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{
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if (m_media.matches()) {
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m_rules->for_each_effective_style_rule(callback);
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}
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}
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bool CSSStyleSheet::evaluate_media_queries(HTML::Window const& window)
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{
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bool any_media_queries_changed_match_state = false;
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bool did_match = m_media.matches();
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bool now_matches = m_media.evaluate(window);
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if (did_match != now_matches)
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any_media_queries_changed_match_state = true;
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if (now_matches && m_rules->evaluate_media_queries(window))
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any_media_queries_changed_match_state = true;
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return any_media_queries_changed_match_state;
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}
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void CSSStyleSheet::set_style_sheet_list(Badge<StyleSheetList>, StyleSheetList* list)
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{
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m_style_sheet_list = list;
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}
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}
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