2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
132 lines
4.4 KiB
C++
132 lines
4.4 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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CSSStyleSheet* CSSStyleSheet::create(JS::Realm& realm, CSSRuleList& rules, MediaList& media, Optional<AK::URL> location)
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{
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return 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 parsed_rule = parse_css_rule(CSS::Parser::ParsingContext {}, 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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