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58bade25dd
Running a StyleInvalidator for every attribute set in a new document was making it impossible to load larger sites. :^)
74 lines
3.2 KiB
C++
74 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Linus Groh <mail@linusgroh.de>
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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 <LibWeb/CSS/StyleInvalidator.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Element.h>
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namespace Web::CSS {
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StyleInvalidator::StyleInvalidator(DOM::Document& document)
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: m_document(document)
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{
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if (!m_document.should_invalidate_styles_on_attribute_changes())
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return;
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auto& style_resolver = m_document.style_resolver();
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m_document.for_each_in_subtree_of_type<DOM::Element>([&](auto& element) {
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m_elements_and_matching_rules_before.set(&element, style_resolver.collect_matching_rules(element));
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return IterationDecision::Continue;
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});
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}
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StyleInvalidator::~StyleInvalidator()
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{
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if (!m_document.should_invalidate_styles_on_attribute_changes())
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return;
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auto& style_resolver = m_document.style_resolver();
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m_document.for_each_in_subtree_of_type<DOM::Element>([&](auto& element) {
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auto maybe_matching_rules_before = m_elements_and_matching_rules_before.get(&element);
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if (!maybe_matching_rules_before.has_value()) {
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element.set_needs_style_update(true);
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return IterationDecision::Continue;
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}
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auto& matching_rules_before = maybe_matching_rules_before.value();
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auto matching_rules_after = style_resolver.collect_matching_rules(element);
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if (matching_rules_before.size() != matching_rules_after.size()) {
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element.set_needs_style_update(true);
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return IterationDecision::Continue;
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}
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style_resolver.sort_matching_rules(matching_rules_before);
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style_resolver.sort_matching_rules(matching_rules_after);
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for (size_t i = 0; i < matching_rules_before.size(); ++i) {
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if (matching_rules_before[i].rule != matching_rules_after[i].rule) {
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element.set_needs_style_update(true);
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break;
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}
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}
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return IterationDecision::Continue;
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});
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}
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}
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