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5e7945e26f
This patch adds a simple, naive & inefficient class for document-wide style invalidation, e.g. after element attribute updates. During construction it collects a HashMap of a document's elements and their matching rules, during destruction it does the same and then compares the results; dirtying all elements that have a different number or order of matching rules afterwards. Much room for improvement, but it solves the problem of stale element styling after attribute updates for now :^) Fixes #4404.
46 lines
1.8 KiB
C++
46 lines
1.8 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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#pragma once
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#include <AK/HashMap.h>
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#include <LibWeb/CSS/StyleResolver.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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class StyleInvalidator {
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public:
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explicit StyleInvalidator(DOM::Document&);
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~StyleInvalidator();
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private:
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DOM::Document& m_document;
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HashMap<DOM::Element*, Vector<MatchingRule>> m_elements_and_matching_rules_before;
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};
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}
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