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LibWeb: Only invalidate styles if a @media
rule changes match status
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parent
144ef3eb9f
commit
fd24782d85
5 changed files with 26 additions and 15 deletions
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@ -103,34 +103,42 @@ void CSSRuleList::for_each_effective_style_rule(Function<void(CSSStyleRule const
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}
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}
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void CSSRuleList::evaluate_media_queries(DOM::Window const& window)
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bool CSSRuleList::evaluate_media_queries(DOM::Window const& window)
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{
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bool any_media_queries_changed_match_state = false;
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for (auto& rule : m_rules) {
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switch (rule.type()) {
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case CSSRule::Type::Style:
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break;
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case CSSRule::Type::Import: {
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auto& import_rule = verify_cast<CSSImportRule>(rule);
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if (import_rule.has_import_result())
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import_rule.loaded_style_sheet()->evaluate_media_queries(window);
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if (import_rule.has_import_result() && import_rule.loaded_style_sheet()->evaluate_media_queries(window))
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any_media_queries_changed_match_state = true;
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break;
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}
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case CSSRule::Type::Media: {
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auto& media_rule = verify_cast<CSSMediaRule>(rule);
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if (media_rule.evaluate(window))
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media_rule.css_rules().evaluate_media_queries(window);
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bool did_match = media_rule.condition_matches();
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bool now_matches = media_rule.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 && media_rule.css_rules().evaluate_media_queries(window))
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any_media_queries_changed_match_state = true;
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break;
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}
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case CSSRule::Type::Supports: {
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auto& supports_rule = verify_cast<CSSSupportsRule>(rule);
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if (supports_rule.condition_matches())
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supports_rule.css_rules().evaluate_media_queries(window);
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if (supports_rule.condition_matches() && supports_rule.css_rules().evaluate_media_queries(window))
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any_media_queries_changed_match_state = true;
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break;
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}
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case CSSRule::Type::__Count:
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VERIFY_NOT_REACHED();
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}
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}
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return any_media_queries_changed_match_state;
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}
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}
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