bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
/*
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* Copyright (c) 2020-2022, 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 <AK/QuickSort.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/StyleSheetListPrototype.h>
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#include <LibWeb/CSS/StyleComputer.h>
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#include <LibWeb/CSS/StyleSheetList.h>
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#include <LibWeb/DOM/Document.h>
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namespace Web::CSS {
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JS_DEFINE_ALLOCATOR(StyleSheetList);
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void StyleSheetList::add_sheet(CSSStyleSheet& sheet)
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{
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sheet.set_style_sheet_list({}, this);
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if (m_sheets.is_empty()) {
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// This is the first sheet, append it to the list.
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m_sheets.append(sheet);
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} else {
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// We have sheets from before. Insert the new sheet in the correct position (DOM tree order).
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bool did_insert = false;
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for (ssize_t i = m_sheets.size() - 1; i >= 0; --i) {
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auto& existing_sheet = *m_sheets[i];
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auto position = existing_sheet.owner_node()->compare_document_position(sheet.owner_node());
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if (position & DOM::Node::DocumentPosition::DOCUMENT_POSITION_FOLLOWING) {
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m_sheets.insert(i + 1, sheet);
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did_insert = true;
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break;
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}
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}
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if (!did_insert)
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m_sheets.prepend(sheet);
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}
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if (sheet.rules().length() == 0) {
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// NOTE: If the added sheet has no rules, we don't have to invalidate anything.
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return;
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}
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m_document->style_computer().invalidate_rule_cache();
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m_document->style_computer().load_fonts_from_sheet(sheet);
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m_document->invalidate_style();
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}
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void StyleSheetList::remove_sheet(CSSStyleSheet& sheet)
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{
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sheet.set_style_sheet_list({}, nullptr);
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m_sheets.remove_first_matching([&](auto& entry) { return entry.ptr() == &sheet; });
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if (sheet.rules().length() == 0) {
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// NOTE: If the removed sheet had no rules, we don't have to invalidate anything.
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return;
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}
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sort_sheets();
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m_document->style_computer().invalidate_rule_cache();
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m_document->invalidate_style();
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}
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JS::NonnullGCPtr<StyleSheetList> StyleSheetList::create(DOM::Document& document)
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{
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auto& realm = document.realm();
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return realm.heap().allocate<StyleSheetList>(realm, document);
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}
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StyleSheetList::StyleSheetList(DOM::Document& document)
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: Bindings::LegacyPlatformObject(document.realm())
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, m_document(document)
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{
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}
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void StyleSheetList::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::StyleSheetListPrototype>(realm, "StyleSheetList"));
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}
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void StyleSheetList::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_document);
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for (auto sheet : m_sheets)
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visitor.visit(sheet);
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}
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// https://www.w3.org/TR/cssom/#ref-for-dfn-supported-property-indices%E2%91%A1
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bool StyleSheetList::is_supported_property_index(u32 index) const
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{
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// The object’s supported property indices are the numbers in the range zero to one less than the number of CSS style sheets represented by the collection.
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// If there are no such CSS style sheets, then there are no supported property indices.
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if (m_sheets.is_empty())
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return false;
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return index < m_sheets.size();
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}
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WebIDL::ExceptionOr<JS::Value> StyleSheetList::item_value(size_t index) const
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{
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if (index >= m_sheets.size())
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return JS::js_undefined();
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return m_sheets[index].ptr();
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}
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void StyleSheetList::sort_sheets()
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{
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quick_sort(m_sheets, [](JS::NonnullGCPtr<StyleSheet> a, JS::NonnullGCPtr<StyleSheet> b) {
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return a->owner_node()->is_before(*b->owner_node());
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});
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}
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}
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